v2.2-paseo-providers: Paseo provider stack + v2.2.1 pane-scoped chat fixes

Ship Paseo-equivalent provider snapshot, AgentComposerBar, ACP dispatch
rewrite with streaming/persist, permission prompts, and agent commands.
Follow-up: pane-scoped chat resolution, CoderMessageList tool timeline,
WS user-delta replace, and inference orphan tool_call stripping.
Archive openspec v2-2; update CHANGELOG and CURRENT.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -1,6 +1,6 @@
 NODE_ENV=production
 PORT=3000
-DATABASE_URL=postgres://boocode:CHANGE_ME@boocode_db:5432/boocode
+DATABASE_URL=postgres://boocode:CHANGE_ME@boocode_db:5432/boochat
 LLAMA_SWAP_URL=http://100.101.41.16:8401
 PROJECT_ROOT_WHITELIST=/opt
 BOOTSTRAP_ROOT=/opt/projects

.gitignore

@@ -1,6 +1,11 @@
 node_modules
 dist
 .env
+
+# Claude / Cursor (local agent & IDE config — CLAUDE.md and AGENTS.md stay tracked)
+.claude/
+.cursor/
+.cursorignore
 CLAUDE.local.md
 *.log
 .DS_Store

AGENTS.md

@@ -0,0 +1,109 @@
+# Agent navigation
+
+Cursor/agent entry point for the BooCode monorepo. **Deep engineering reference:** `CLAUDE.md` (Claude Code). This file is navigation + task routing only.
+
+Last updated: 2026-05-25
+
+## Doc map
+
+| Need | Read |
+|------|------|
+| Commands, gotchas, inference, DB, env | `CLAUDE.md` |
+| Read-only chat behavior | `BOOCHAT.md` |
+| Write tools, dispatch, pending changes | `BOOCODER.md` |
+| Shipped vs planned, version order | `boocode_roadmap.md` |
+| Latest release truth | `CHANGELOG.md` (top entry = current) |
+| System diagram + data flow | `docs/ARCHITECTURE.md` |
+| Current focus / blockers | `CURRENT.md` |
+| Batch convention | `openspec/README.md` |
+| Shipped batch snapshots | `openspec/changes/archived/` |
+| Chat agent personas + tool lists | `data/AGENTS.md` |
+| External repo lift inventory | `boocode_code_review.md` |
+
+## Monorepo layout (actual)
+
+Three **surfaces**, four **packages**. There is no `apps/chat/` directory.
+
+| Surface | Packages | Port | Deploy |
+|---------|----------|------|--------|
+| **BooChat** | `apps/server` (API + inference) + `apps/web` (SPA) | `100.114.205.53:9500` | Docker `boocode` container |
+| **BooTerm** | `apps/booterm` | `100.114.205.53:9501` | Docker `booterm` container |
+| **BooCoder** | `apps/coder` | host `:9502` | systemd `boocoder.service` (not Docker since v2.1.0) |
+
+Shared: Postgres 16 — Docker service `boocode_db`, **database name `boochat`**, host port `127.0.0.1:5500`.
+
+## Task routing
+
+| Task type | Start here |
+|-----------|------------|
+| Chat inference / tools / compaction | `apps/server/src/services/inference/` |
+| WS frames | `apps/server/src/types/ws-frames.ts` + `apps/web/src/api/ws-frames.ts` (keep in sync) |
+| Frontend chat UI | `apps/web/src/components/`, hooks in `apps/web/src/hooks/` |
+| BooCoder write tools / dispatch | `apps/coder/src/` — build server first (`pnpm -C apps/server build`) |
+| Provider picker / external agents | `apps/coder/src/services/provider-registry.ts`, `dispatcher.ts`, `agent-probe.ts` |
+| Terminal panes | `apps/booterm/src/`, frontend `TerminalPane.tsx` |
+| Schema changes | `apps/server/src/schema.sql` + sync `*_STATUSES` in `apps/server/src/types/api.ts` |
+| New batch / feature | `openspec/changes/<slug>/proposal.md` + `tasks.md` (see below) |
+
+## Verification (before claiming done)
+
+```bash
+pnpm -C apps/server test && pnpm -C apps/server build
+npx tsc -p apps/web/tsconfig.app.json --noEmit   # root tsc can miss web errors
+curl http://100.114.205.53:9500/api/health       # Tailscale IP, not localhost:9500
+curl http://100.114.205.53:9502/api/health       # BooCoder on host
+```
+
+Deploy truth beats source-only reads — check running health + `git log --oneline -3`.
+
+## Hard rules (from CLAUDE.md)
+
+- **Do not commit or push** unless Sam explicitly asks.
+- **No app-layer auth** — Authelia at the reverse proxy.
+- **Parts table is source of truth** — read message tool fields from `messages_with_parts` view, write via `insertParts`.
+- **New WS frame type** — update server + web schemas; publish via `publishFrame` / `publishUserFrame` only.
+- **New tool** — own file in `services/`, register in `tools.ts` `ALL_TOOLS`; whitelists derive from there, never hardcoded.
+- **Typecheck web with per-app tsconfig** — root `tsc --noEmit` uses project references and can miss errors.
+- **`includeUsage: true`** on `createOpenAICompatible` in `provider.ts` — do not remove.
+- **Agent dispatch** — direct `spawn`/`exec` on host via `install_path` (v2.1.0+); SSH helpers deprecated.
+- **Event dedup** — server publishes via broker; frontend must not duplicate `sessionEvents.emit` after API calls that already WS-broadcast.
+
+## Using openspec with Cursor
+
+Openspec is a **folder convention**, not a CLI. Use it to give agents a scoped brief before coding.
+
+### When starting a batch
+
+1. Create `openspec/changes/<slug>/` (lowercase-hyphenated, e.g. `v2-2-arena-ui`).
+2. Write `proposal.md` — why, scope, non-goals, dependencies.
+3. Write `tasks.md` — numbered checkbox steps (build + smoke).
+4. Optional `design.md` — schema/API decisions that outlive the batch.
+
+See `openspec/README.md` for the full shape. Shipped pre-v1.13.15 batches live in `openspec/changes/archived/` as snapshots only.
+
+### Prompting an agent
+
+```
+@openspec/changes/<slug>/proposal.md @openspec/changes/<slug>/tasks.md
+Implement tasks 1–3. Server tests must pass. Do not commit.
+```
+
+Attach the spec files with `@` so they load into context. Point at specific code paths when known:
+
+```
+@openspec/changes/v2-x/proposal.md
+Extend apps/coder/src/routes/providers.ts — follow provider-registry.ts patterns.
+```
+
+### After shipping
+
+- Tag: `vMAJOR.MINOR.PATCH-slug`
+- Add entry to top of `CHANGELOG.md`
+- Move or snapshot the openspec folder to `archived/` if you want history preserved
+- Update `CURRENT.md` and `boocode_roadmap.md` shipped table if the batch was roadmap-tracked
+
+### What not to use openspec for
+
+- One-line bug fixes — just describe the bug + file.
+- Exploratory questions — Ask mode + `@CLAUDE.md` is enough.
+- Duplicating `CLAUDE.md` — openspec is per-batch scope, not permanent conventions.

CHANGELOG.md

@@ -2,6 +2,62 @@
 
 All notable changes per release tag. Most recent on top, ordered by tag creation date (which matches the git history). Tag names follow `vMAJOR.MINOR.PATCH-slug` — the slug describes what shipped, so the tag name alone is enough to recall the batch.
 
+## v2.2.1-pane-scoped-chats — 2026-05-26
+
+Follow-up fixes on the v2.2 Paseo provider stack. Pane-scoped chat resolution: `resolveChatId(sql, sessionId, paneId)` reads `sessions.workspace_panes`, requires `pane_id` on coder POST routes, and creates a scoped chat per coder/terminal pane instead of falling back to the session's first open chat (which fused BooCoder writes into the BooChat pane). Client `useWorkspacePanes` seeds new coder/terminal panes with dedicated chats on create, hydrate, and workspace sync; `CoderPane` blocks send until seeded and filters WS frames + `GET /messages?chat_id=` to that chat. External-agent tool UI: new `CoderMessageList` renders BooChat-style `ToolCallLine` timeline (tools before answer text on combined ACP rows). WS user-delta handling replaces content instead of appending (fixes garbled duplicate user messages when optimistic UI met full-body deltas). BooChat inference: `buildMessagesPayload` strips orphan assistant `tool_calls` without matching `tool` rows and skips stray tool rows when the owning assistant turn is incomplete (fixes "Tool results are missing for tool calls" on shared chats with ACP history). Pairs with `v2.2-paseo-providers`.
+
+## v2.2-paseo-providers — 2026-05-26
+
+Paseo-equivalent provider stack for BooCoder. Seven providers (boocode, cursor, claude, opencode, goose, qwen, copilot) with snapshot API (`provider-snapshot.ts`, ACP cold probe, per-provider model merge, cursor models from ACP). Frontend `AgentComposerBar` replaces `ProviderPicker` — provider / mode / model / thinking in the coder composer; `SlashCommandPicker` + `useProviderSnapshot` hook. ACP dispatch rewritten (`acp-dispatch.ts`, `acp-stream.ts`, `acp-spawn.ts`, `agent-turn-persist.ts`, `acp-tool-snapshot.ts`) with Paseo merge/stream/persist pattern, inline `PermissionCard` prompts, and `reasoning_delta` WS frames. Agent slash-command hints via ACP `available_commands_update` cached in `agent-commands-cache.ts` + `AgentCommandsHint`. Arena and MCP entry points accept `mode_id` / `thinking_option_id`. SSH helpers removed; all host exec via `host-exec.ts` direct spawn. Server adds coder proxy route + shared skill invoke. New tests: acp-derive, acp-tool-snapshot, cursor-models, provider-commands, provider-snapshot, agents. Docs: `AGENTS.md`, `docs/ARCHITECTURE.md`, openspec `v2-2-paseo-providers`.
+
+## v2.1.1-roadmap-cleanup — 2026-05-25
+
+Roadmap reconciliation, README updates, and openspec archive housekeeping. No runtime behavior changes.
+
+## v2.1.0-provider-picker — 2026-05-25
+
+Provider picker: BooCoder moves from Docker container to host systemd service (`boocoder.service`). All agent dispatch (ACP + PTY) switches from SSH tunnel to direct `spawn`/`exec` — no more `sshSpawn`/`sshExec`/`sshSpawnWithStdin` (marked `@deprecated`). New provider registry (`provider-registry.ts`) with 5 providers (boocode, opencode, goose, claude, qwen), per-provider model discovery (llama-swap for ACP agents, `~/.qwen/settings.json` for qwen, static for claude), and `agent-probe.ts` runs direct `which`/`exec` instead of SSH. `GET /api/providers` route assembles the provider list with installed status, models, and transport (ACP→PTY fallback if `supports_acp` is false). Frontend `ProviderPicker` component in CoderPane header lets users pick provider/model per message; messages route through `tasks` row for external providers instead of inference enqueue. Smart scroll: `MessageList` only auto-scrolls when user is near bottom (150px threshold). DB schema adds `models`, `label`, `transport` columns to `available_agents`. Bug fixes: `loadContext` SELECT now includes `allowed_read_paths` (cross-repo read grants were silently failing), cap hit sentinel insertion moved before `buildMessagesPayload` call.
+
+## v2.0.5 — 2026-05-25
+
+FAST_MODEL routing: optional `FAST_MODEL` env var routes cheaper models (titles, summaries, labeling) to a small model on llama-swap (e.g. `nemotron-nano-4b`) instead of loading the 35B for 20-token calls. Falls back to session model or DEFAULT_MODEL. Tool-use summaries: `runCapHitSummary` now writes the cap_hit sentinel before building the summary payload (bug fix — sentinel was written after, causing it to appear after the summary text in the message list). Qwen Code dispatch: `qwen -p "<task>" --output-format stream-json` via PTY (non-interactive mode, no `--yolo` flag needed). Arena: `POST /api/arena` dispatches the same task to N models/agents in parallel, each with its own task + worktree; `GET /api/arena/:id` for results; `POST /api/arena/:id/select/:task_id` picks winner.
+
+## v2.0.4-hardening — 2026-05-25
+
+Path-guard fuzz suite: 25+ traversal-attack tests covering ../ sequences (all depths), encoded traversal (%2e%2e), null byte injection, absolute path escape, prefix-without-separator, backslash traversal, and the full secret-file deny list (.env, *.pem, id_rsa*, *.key, credentials.json, *.kdbx, .netrc). Plus 5 valid-path positive tests confirming normal writes aren't blocked and 5 edge-case tests (empty, whitespace-only, very long path, triple-dot, multiple slashes). Null-byte and whitespace-only guards added to `resolveWritePath` (previously only checked empty string). DB-integration test skeleton for pending_changes full-cycle (queue create/edit/delete, apply, rewind) gated on DATABASE_URL via `describe.runIf`. Production readiness verified: all services healthy, all builds clean, 57 tests passing (23 existing + 34 new).
+
+## v2.0.3 — 2026-05-25
+
+CLI client (`apps/coder/src/cli.ts`, 249 lines) for headless agent interaction. Human inbox view (`human_inbox` view) surfaces tasks in `blocked`/`failed` state. Cost tracking: `tool_cost_stats` view with per-tool 100-call rolling window. `new_task` tool (Boomerang pattern): creates tasks with project context and optional arena contestants. `check_task_status` and `list_tasks` tools for task lifecycle management. Stats routes (`GET /api/stats`) for cost aggregation. Dispatcher extended to support new task states.
+
+## v2.0.2 — 2026-05-25
+
+BooCoder MCP server (`mcp-server.ts`, 201 lines) exposing 6 write-capable tools over stdio: `edit_file`, `create_file`, `delete_file`, `view_pending_changes`, `apply_pending`, `rewind`. Registered in `apps/coder/src/index.ts` as an MCP stdio server. Enables external agents (opencode, claude, qwen) to call BooCoder's write tools through the MCP protocol.
+
+## v2.0.1 — 2026-05-25
+
+ACP dispatch (`acp-dispatch.ts`, 271 lines): runs ACP-capable agents (opencode, goose) via SSH tunnel wrapping stdio into NDJSON streams for `@agentclientprotocol/sdk` JSON-RPC sessions. PTY dispatch (`pty-dispatch.ts`, 139 lines): runs non-ACP agents (claude, qwen) via SSH with stdin pipe for non-interactive mode. Worktree management (`worktrees.ts`, 118 lines): per-task git worktree creation and cleanup. SSH helper (`ssh.ts`, 126 lines): `sshSpawn`, `sshExec`, `sshSpawnWithStdin` for host command execution. Dispatcher extended to route tasks to ACP vs PTY based on agent capability. Agent probe updated to verify ACP support.
+
+## v2.0.0-final — 2026-05-25
+
+Dispatcher (`dispatcher.ts`, 191 lines): task queue with polling loop, Path A (native inference) and Path B (external agent dispatch). Task routes (`tasks.ts`, 138 lines): CRUD for tasks with state transitions. Agent probe (`agent-probe.ts`, 51 lines): startup scan of host for installed agents (opencode, goose, claude, pi, qwen), version detection, ACP capability verification. Schema adds `tasks` table. CLAUDE.md updated with v2.0.0 architecture docs covering BooCoder, DB rename, MCP config, workspace deps.
+
+## v2.0.0 — 2026-05-25
+
+BooCoder frontend: `CoderPane.tsx` (432 lines) as a `'coder'` pane type within BooChat's SPA — chat pane + diff pane (pending changes) + session picker. Standalone fallback SPA in `apps/coder/web/` (Vite + React) served at `:9502` directly. Session streaming via `useSessionStream` WS hook. API client with typed endpoints. Workspace pane persistence via `useWorkspacePanes`. Server routes for pending changes (`PATCH/POST /api/coder/sessions/:id/pending`). Verification discipline rules + chat naming from assistant response.
+
+## v2.0.0-beta — 2026-05-25
+
+Write tools: `edit_file`, `create_file`, `delete_file`, `apply_pending`, `rewind` — queue in `pending_changes` table, nothing hits disk until applied. `write_guard.ts` validates paths (resolve + prefix-check, no realpath for creates). Inference loop integration via `inference_context.ts` (bridges inference turn state to tool execution). API routes: `messages.ts` (POST /api/coder/sessions/:id/messages), `pending.ts` (GET/POST /api/coder/sessions/:id/pending). WebSocket support (`ws.ts`) for real-time pending changes updates. Tool adapter (`adapter.ts`) converts inference tool calls to tool execution. Write guard tests (115 lines). Server-side inference loop wired to BooCoder tools.
+
+## v2.0.0-alpha — 2026-05-25
+
+BooCoder foundation: Docker container (`apps/coder/Dockerfile`), docker-compose service, host env file. Schema: `sessions`, `chats`, `messages`, `pending_changes`, `tasks`, `message_parts` tables. DB renamed from `boocode` to `boochat`. Config module, PostgreSQL connection (porsager/postgres). Initial Fastify server with health endpoint. BOOCODER.md guidance file. Implementation plan (8 phases). Proposal updated with AGENTS.md extensions, Boomerang pattern, observation hooks.
+
+## v2.0-proposal — 2026-05-24
+
+v2.0 proposal: BooCoder write tools, pending-changes queue, ACP dispatch, MCP server. Openspec proposal (`proposal.md`, 274 lines) and task breakdown (`tasks.md`, 130 lines) defining the v2.0 feature scope — write-capable coding agent with file operations, external agent dispatch via ACP/PTY, and MCP server for tool exposure.
+
 ## v1.16.0-codesight-merge — 2026-05-24
 
 Ports codesight's highest-value analysis capabilities into the codecontext sidecar as 4 new MCP tools. Tier 1 (graph queries on existing edges, no re-parsing): `get_blast_radius` (BFS reverse-edge traversal — "what breaks if I change this file?", with depth tracking) and `get_hot_files` (most-imported files ranked by incoming edge count — change-risk indicators). Tier 2 (tree-sitter AST re-parsing on demand): `get_routes` (Fastify/Express HTTP route extraction with method, path, file, line, inferred tags for db/auth/cache) and `get_middleware` (middleware registration detection via import-name heuristics and app.register/addHook/setErrorHandler patterns, classifying as auth/cors/rate-limit/security/error-handler/logging/validation). All 4 tools use `defer s.graphMu.RUnlock()` for consistent mutex discipline (reviewer caught that the initial implementation released the lock early on the Tier 2 tools). Route object-property extraction delegates to `extractStringValue` for template-literal handling (reviewer catch). codecontext sidecar rebuilt from `/opt/forks/codecontext` commit `b19e646`, tagged `v1.16.0-codesight-merge`. BooCode wrapper tools follow the existing codecontext pattern — 4 new files in `apps/server/src/services/tools/codecontext/`, registered in ALL_TOOLS. 29 new Go tests + 363/363 BooCode server tests passing. No schema changes, no frontend changes.

CLAUDE.md

@@ -2,6 +2,8 @@
 
 This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
 
+**Cursor agents:** start with `AGENTS.md` (navigation) and `docs/ARCHITECTURE.md` (diagram). This file is the deep engineering reference.
+
 ## What is BooCode
 
 Self-hosted single-user developer chat app. AI assistant with read-only file tools (view_file, list_dir, grep, find_files) running against a local llama-swap inference server. Sessions organized by project, with a multi-pane workspace (chat + file browser side by side).
@@ -66,9 +68,25 @@ Key services:
 - **`messages_with_parts` view** (v1.13.1-B; `schema.sql`). Read sites that need `tool_calls` / `tool_results` / `reasoning_parts` SELECT from this view, NOT `messages` directly. v1.13.20 dropped the legacy `messages.tool_calls` / `messages.tool_results` JSON columns; the view now reads parts-only subselects. Writes target `message_parts` exclusively via `insertParts` (or via the helpers `partsFromAssistantMessage` / `partsFromToolMessage`). The `Message` wire type still carries `tool_calls?` / `tool_results?` because the view synthesizes them from parts — frontend reads are unchanged. Shapes: `tool_calls jsonb[]`, `tool_results jsonb` single object, `reasoning_parts jsonb[]` of `{text}`. If you ever need to UPDATE a message and return its full Message shape, do a two-step UPDATE returning `id` followed by SELECT from the view — RETURNING off the bare `messages` table no longer carries the tool fields.
 - **`services/file_ops.ts`** — Shared file operation implementations used by both inference tools and HTTP routes.
 - **`services/auto_name.ts`** — Non-streaming LLM call to generate 4-word session titles after first assistant reply.
+- **`services/provider-registry.ts`** — Static registry of provider metadata (label, transport, model source). `PROVIDERS` array, `PROVIDERS_BY_NAME` map. 5 providers: boocode (native), opencode (acp), goose (pty), claude (pty), qwen (pty).
+- **`services/agent-probe.ts`** — Startup probe using direct `exec()` (not SSH). Discovers installed agents on host, their versions, ACP support, and models. Qwen models read from `~/.qwen/settings.json`. Claude models are static from the registry. Results persisted to `available_agents` table.
+- **`routes/providers.ts`** — `GET /api/providers` returns installed providers with models. Transport field reflects actual capability (checks `supports_acp` from DB, not just registry preference).
+- **Provider picker dispatch**: when `provider !== 'boocode'`, the message route creates a `tasks` row (with `session_id` set) instead of calling `inference.enqueue`. The dispatcher picks it up and dispatches via ACP or PTY using the agent's `install_path`.
 
 Route registration: all routes registered in `index.ts` via `register*Routes(app, sql, ...)` functions. Routes are in `routes/*.ts`.
 
+### BooCoder (`apps/coder/src/`)
+
+- Write-capable coding agent. Runs as a **systemd service on the host** (`boocoder.service`), NOT in Docker. Fastify server at port 9502, connects to postgres at `127.0.0.1:5500`.
+- **Workspace dependency on `@boocode/server`**: imports `createInferenceRunner`, `createBroker`, `ALL_TOOLS`, `appendMcpTools` from the server's compiled `dist/`. apps/server's `package.json` has an `exports` map with `types` conditions for NodeNext resolution. apps/server must build FIRST.
+- Build + deploy: `pnpm -C apps/server build && pnpm -C apps/coder build && sudo systemctl restart boocoder`. Env file at `apps/coder/.env.host`. Service file at `/etc/systemd/system/boocoder.service`.
+- Agent dispatch spawns binaries directly using `install_path` from `available_agents` — no `spawn('sh', ['-c', ...])` (fails under systemd). Follows Paseo's pattern: `spawn(fullBinaryPath, argsArray, { cwd })`.
+- systemd hardening: only `NoNewPrivileges=true` is safe. `ProtectSystem`, `ProtectHome`, `PrivateTmp` all break agent dispatch (agents need full filesystem access to read configs, write to worktrees).
+- `apps/server/tsconfig.json` has `declaration: true` so `.d.ts` files exist for workspace consumers.
+- Write tools (`edit_file`, `create_file`, `delete_file`, `apply_pending`, `rewind`) queue in `pending_changes` table. Nothing hits disk until `apply_pending` is called. `write_guard.ts` validates paths (resolve + prefix-check, no realpath since files may not exist for creates).
+- Frontend: NOT a separate SPA. BooCoder is a `'coder'` pane type within BooChat's SPA (`apps/web/`). `CoderPane.tsx` in `apps/web/src/components/panes/`. API requests go through `/api/coder/*` proxy (Vite dev + Fastify production) which rewrites to the boocoder host service (`BOOCODER_URL` env var, default `http://100.114.205.53:9502`). WS connects directly to `:9502`.
+- `apps/coder/web/` is a STANDALONE fallback SPA served at `:9502` directly. The PRIMARY BooCoder frontend is the `CoderPane` in BooChat's SPA (`apps/web/src/components/panes/CoderPane.tsx`), accessible via the "Coder" pane in the workspace at `code.indifferentketchup.com`. Both exist; the pane is what Sam uses.
+
 ### Frontend (`apps/web/src/`)
 
 - **React 18** + React Router v6 + **Tailwind v4** + shadcn/radix-ui primitives.
@@ -105,14 +123,20 @@ Sessions hold 1–5 panes (chat / empty / placeholder terminal+agent). v1.12.1 m
 
 ## Database
 
-PostgreSQL 16. Tables: `projects`, `sessions`, `chats`, `messages`, `settings`, `message_parts` (v1.13.0). Views: `messages_with_parts` (v1.13.1-B parts-merge read path), `tool_cost_stats` (v1.13.10 per-tool 100-call rolling window). (`session_panes` was dropped in v1.12.1; workspace pane state lives in `sessions.workspace_panes jsonb`.) Schema applied idempotently on startup via `applySchema()`. Use `clock_timestamp()` (not `NOW()`) inside transactions. CHECK constraints in place: `projects_status_chk` ('open'|'archived'), `sessions_status_chk` (same), `chats_status_chk` (same), `messages_role_chk`, `messages_status_chk` — keep in sync with the `*_STATUSES` const arrays in `apps/server/src/types/api.ts`. The older anonymous `messages_status_check` (without 'cancelled') and `messages_role_check` (without 'system') were dropped in v1.12.1; only the `_chk` variants remain.
+PostgreSQL 16. Database name: `boochat` (renamed from `boocode` in v2.0.0-alpha; Docker service name stays `boocode_db`). Tables: `projects`, `sessions`, `chats`, `messages`, `settings`, `message_parts` (v1.13.0), `pending_changes` (v2.0.0), `tasks` (v2.0.0), `available_agents` (v2.0.0). Views: `messages_with_parts` (v1.13.1-B parts-merge read path), `tool_cost_stats` (v1.13.10 per-tool 100-call rolling window), `human_inbox` (v2.0.0 — tasks WHERE state IN blocked/failed). (`session_panes` was dropped in v1.12.1; workspace pane state lives in `sessions.workspace_panes jsonb`.) Schema applied idempotently on startup via `applySchema()`. Use `clock_timestamp()` (not `NOW()`) inside transactions. CHECK constraints in place: `projects_status_chk` ('open'|'archived'), `sessions_status_chk` (same), `chats_status_chk` (same), `messages_role_chk`, `messages_status_chk` — keep in sync with the `*_STATUSES` const arrays in `apps/server/src/types/api.ts`. The older anonymous `messages_status_check` (without 'cancelled') and `messages_role_check` (without 'system') were dropped in v1.12.1; only the `_chk` variants remain.
 
 Schema CHECK migration order when renaming allowed values: (1) `ALTER TABLE ... DROP CONSTRAINT IF EXISTS <system_name>` (inline `CREATE TABLE` checks get `<table>_<column>_check`), (2) `UPDATE` rows to new values, (3) wrap new constraint ADD in `DO $$ ... pg_constraint` guard — that block is the only way to get `ADD CONSTRAINT IF NOT EXISTS`.
 
 
 ## Environment
 
-Required: `DATABASE_URL`, `LLAMA_SWAP_URL`. Optional: `PORT` (3000), `HOST` (0.0.0.0), `PROJECT_ROOT_WHITELIST` (/opt, read-only scope for add-existing path resolution), `BOOTSTRAP_ROOT` (/opt/projects, writable scope for create-new-project bootstrap mkdir target — host must `mkdir -p /opt/projects` before container start), `DEFAULT_MODEL`, `LOG_LEVEL`, `SEARXNG_URL` (default `http://100.114.205.53:8888` — internal Tailscale Fathom; the public `search.indifferentketchup.com` is behind Authelia and unusable from server context), `BOOCODE_TOOLS` (`core` | `standard` | `all`, default `all`; v1.13.15-tools tier filter — ceiling, never expands an agent's whitelist).
+Required: `DATABASE_URL`, `LLAMA_SWAP_URL`. Optional: `PORT` (3000), `HOST` (0.0.0.0), `PROJECT_ROOT_WHITELIST` (/opt, read-only scope for add-existing path resolution), `BOOTSTRAP_ROOT` (/opt/projects, writable scope for create-new-project bootstrap mkdir target — host must `mkdir -p /opt/projects` before container start), `DEFAULT_MODEL`, `LOG_LEVEL`, `SEARXNG_URL` (default `http://100.114.205.53:8888` — internal Tailscale Fathom; the public `search.indifferentketchup.com` is behind Authelia and unusable from server context), `BOOCODE_TOOLS` (`core` | `standard` | `all`, default `all`; v1.13.15-tools tier filter — ceiling, never expands an agent's whitelist), `MCP_CONFIG_PATH` (optional; default `/data/mcp.json` — JSON config for MCP servers matching opencode's `mcpServers` shape; file missing = no MCP).
+
+BooCoder at port 9502: `curl http://100.114.205.53:9502/api/health`. Runs as `boocoder.service` on the host (not Docker). Deploy: `pnpm -C apps/server build && pnpm -C apps/coder build && sudo systemctl restart boocoder`. Health reports tool count: `{"ok":true,"db":true,"tools":33}`.
+
+- `FAST_MODEL` (optional) — cheaper model for titles, summaries, labeling (auto_name.ts, tool-summaries.ts). Falls back to session model or DEFAULT_MODEL when unset. Set to a small model on llama-swap (e.g. `nemotron-nano-4b`) to avoid loading the 35B for 20-token calls.
+- Qwen Code dispatch: `OPENAI_BASE_URL=http://100.101.41.16:8401/v1 OPENAI_API_KEY=dummy qwen -p "<task>" --output-format stream-json`. Install: `npm install -g @qwen-code/qwen-code@latest`. Node ≥22 required on host (container stays Node 20; BooCoder dispatches via direct spawn on host). No `--yolo` flag — non-interactive mode (`-p`) runs autonomously without approval prompts. ACP bridge is HTTP daemon (not stdio); use PTY dispatch.
+- Arena (v2.0.5): `POST /api/arena {project_id, input, contestants: [{agent?, model?}]}` dispatches the same task to N models/agents in parallel. Each contestant gets its own task + worktree. `GET /api/arena/:id` for results. `POST /api/arena/:id/select/:task_id` picks winner.
 
 ## Workflow
 
@@ -123,7 +147,7 @@ Required: `DATABASE_URL`, `LLAMA_SWAP_URL`. Optional: `PORT` (3000), `HOST` (0.0
 - Deploy: `cd /opt/boocode && docker compose up --build -d` (or `docker compose build --no-cache boocode && docker compose up -d` if you suspect a layer-cache issue).
 - Git push to Gitea: `GIT_SSH_COMMAND="ssh -i /opt/boocode/secrets/boocode_gitea -o IdentitiesOnly=yes" git push origin <branch>`. The default agent identity is rejected; the in-repo deploy key (`secrets/`, gitignored) is the working one. Transient `Connection reset by peer` retries cleanly after `sleep 5`.
 - Don't accumulate `.bak-*` files. Clean them up in the same batch or immediately after merge.
-- DB-integration tests opt-in via env var: `DATABASE_URL='postgres://boocode:devpass@localhost:5500/boocode' pnpm -C apps/server test`. Host port is 5500 (mapped from `boocode_db:5432`); password is `${POSTGRES_PASSWORD}` from `.env` (`devpass`), NOT the literal in `.env`'s `DATABASE_URL=postgres://boocode:Ketchup1479@boocode_db:5432/...` line. Pattern: `describe.runIf(!!process.env.DATABASE_URL)(...)` with a `beforeAll` that applies the schema via `sql.unsafe(readFileSync(schemaPath))`. Tests skip cleanly when var is unset. `tool_cost_stats.test.ts` is the reference.
+- DB-integration tests opt-in via env var: `DATABASE_URL='postgres://boocode:devpass@localhost:5500/boochat' pnpm -C apps/server test`. Host port is 5500 (mapped from `boocode_db:5432`); password is `${POSTGRES_PASSWORD}` from `.env` (`devpass`), NOT the literal in `.env`'s `DATABASE_URL=postgres://boocode:Ketchup1479@boocode_db:5432/...` line. Pattern: `describe.runIf(!!process.env.DATABASE_URL)(...)` with a `beforeAll` that applies the schema via `sql.unsafe(readFileSync(schemaPath))`. Tests skip cleanly when var is unset. `tool_cost_stats.test.ts` is the reference.
 - Host-side smoke endpoint: `curl http://100.114.205.53:9500/api/...`. The boocode container's port mapping binds to the Tailscale IP, not `0.0.0.0`, so `localhost:9500` doesn't work from the host shell. Same for booterm at `:9501`.
 - Fastify global JSON parser tolerates empty bodies (overridden in `index.ts`); bodyless POSTs (archive, unarchive, stop) work without setting `Content-Type` tricks on the client.
 - Event dedup discipline: for any mutation the server publishes via `broker.publishUser`, do NOT add a local `sessionEvents.emit(...)` after the API call — `useUserEvents` forwards the WS frame onto the bus. Frontend mutation handlers must be idempotent (dedup by id, no-op on already-present).
@@ -134,6 +158,8 @@ Required: `DATABASE_URL`, `LLAMA_SWAP_URL`. Optional: `PORT` (3000), `HOST` (0.0
 - `/opt/boolab` hosts a working sibling BooCode terminal at `boocode.indifferentketchup.com`. Useful for visual side-by-side comparison on the same iPhone when debugging booterm rendering. Boolab uses Tailwind v3 (`@tailwind base`); boocode uses v4 — many subtle build differences. Don't assume parity.
 - booterm SSHs to the host as `samkintop@100.114.205.53` (the Tailscale IP). The hostname `ubuntu-homelab` (shown in the bash prompt after login) does NOT resolve from inside the container — only the host's `/etc/hosts` knows it. Override via `BOOTERM_SSH_HOST` / `BOOTERM_SSH_USER` env vars in docker-compose if you ever move the shell to a different machine.
 - codecontext sidecar lives at `/opt/boocode/codecontext/`. Sidecar HTTP API at `http://codecontext:8080/v1/<tool_name>` over the `boocode_net` bridge (no host port). BooCode wrappers in `apps/server/src/services/tools/codecontext/`. The `.codecontextignore.template` documents recommended ignore patterns; users copy and adapt to project root manually.
+- codecontext fork at `/opt/forks/codecontext/` — separate git repo (branch `boocode-ts`), pushed via the same boocode_gitea SSH key to `indifferentketchup/codecontext`. Build: `go build ./...`. Test: `go test ./...`. Docker rebuild: `docker compose build --no-cache codecontext`.
+- Go binary: `/snap/go/current/bin/go` (not on PATH by default). Use `export PATH=$PATH:/snap/go/current/bin` or full path for Go commands.
 - `os/exec` child supervisors must explicitly call `child.Wait()` in a goroutine and `os.Exit` on child death. `Signal(0)` returns nil on zombies and is NOT a liveness check. Without `Wait()`, docker's `restart: unless-stopped` policy never fires because the parent stays alive. The `codecontext/shim.go` implementation is the reference pattern.
 
 ## Conventions
@@ -156,3 +182,6 @@ Required: `DATABASE_URL`, `LLAMA_SWAP_URL`. Optional: `PORT` (3000), `HOST` (0.0
 - Tool-name whitelists must derive from `ALL_TOOLS` in `services/tools.ts`, never hardcoded. `services/agents.ts` `ALL_TOOL_NAMES` had this drift class until v1.12 — same pattern applies to any future tool-aware code.
 - Agent registry lives at `data/AGENTS.md` (global, bind-mounted at `/data/AGENTS.md`). No per-project `AGENTS.md` in this repo — removed in v1.12 to eliminate the two-files-must-stay-in-sync drift. The `getAgentsForProject` per-project override mechanism remains for *other* projects.
 - MCP stdio transport uses newline-delimited JSON (NDJSON), NOT LSP-style `Content-Length` headers. The `codecontext/shim.go` framing implementation is the reference; per the MCP spec (modelcontextprotocol.io/specification/server/transports).
+- **Workspace dependency pattern** (`apps/coder` → `@boocode/server`): the consuming package adds `"@boocode/server": "workspace:*"` in `package.json`. The provider's `package.json` needs `exports` with `types` + `default` conditions per subpath: `"./inference": { "types": "./dist/.../index.d.ts", "default": "./dist/.../index.js" }`. Without the `types` condition, NodeNext resolution can't find `.d.ts` files and tsc fails with "Cannot find module" in the consumer.
+- **JSONB columns**: use `sql.json(value as never)` — NOT `${JSON.stringify(value)}::jsonb` which double-serializes (stores a JSON string instead of a JSON object/array). Pattern established in `parts.ts`, `settings.ts`.
+- **`payload.ts:loadContext` SELECT**: must include every `Session` field that downstream code reads. The tool phase reads `session.allowed_read_paths`; if the SELECT omits it, cross-repo read grants silently fail. The `Session` TypeScript type doesn't catch this because `sql<Session[]>` doesn't enforce column coverage.

CURRENT.md

@@ -0,0 +1,10 @@
+# Current focus
+
+Last updated: 2026-05-26
+
+- **Batch:** v2.3-provider-lifecycle (openspec drafted; not started)
+- **Branch:** `main`
+- **Blockers:** none
+- **Last shipped:** `v2.2.1-pane-scoped-chats` (pairs with `v2.2-paseo-providers` on same commit)
+
+Update this file when starting or finishing a batch. Agents: read this first for session intent; if stale vs `CHANGELOG.md`, trust CHANGELOG for shipped state.

README.md

@@ -1,6 +1,8 @@
 # boocode
 
-Self-hosted single-user developer chat app. v1: chat only.
+Self-hosted single-user developer chat app. 3-app monorepo: BooChat (read-only chat), BooCoder (write tools + agent dispatch), BooTerm (PTY terminals).
+
+**Agent navigation:** [`AGENTS.md`](AGENTS.md) · **Architecture:** [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md) · **Engineering reference:** [`CLAUDE.md`](CLAUDE.md)
 
 ## Stack
 
@@ -13,6 +15,8 @@ Self-hosted single-user developer chat app. v1: chat only.
 
 - `apps/server` — Fastify API + WebSocket + inference loop + file-read tools
 - `apps/web` — React frontend; served by Fastify in production, Vite in dev
+- `apps/booterm` — Fastify + node-pty + tmux for in-browser terminal panes
+- `apps/coder` — Fastify write tools + ACP/PTY dispatcher + MCP server (BooCoder)
 
 ## Local dev
 
@@ -28,7 +32,7 @@ cp .env.example .env
 docker compose up -d boocode_db
 
 # run server (port 3000) and web (port 5173) in two shells
-DATABASE_URL=postgres://boocode:devpass@127.0.0.1:5500/boocode \
+DATABASE_URL=postgres://boocode:devpass@127.0.0.1:5500/boochat \
 LLAMA_SWAP_URL=http://100.101.41.16:8401 \
 pnpm dev:server
 
@@ -49,11 +53,18 @@ docker compose up --build -d
 Binds to `100.114.205.53:9500` (Tailscale). Authelia is expected to gate the
 upstream and inject `Remote-User`. Postgres binds loopback only.
 
-## What v1 has
+## Services
 
-Project sidebar, sessions per project, chat with streaming responses over
-WebSocket, four file-read tools scoped to the project root (`view_file`,
-`list_dir`, `grep`, `find_files`), and a model picker driven by llama-swap's
-`/v1/models`.
+|Service|Port|Description|
+|---|---|---|
+|BooChat|`100.114.205.53:9500`|Read-only chat + SPA |
+|BooTerm|`100.114.205.53:9501`|PTY/tmux terminal panes |
+|BooCoder|host:9502|Write tools + agent dispatch + MCP server (systemd service, not Docker) |
+|Postgres|`127.0.0.1:5500`|Shared database (`boochat`; Docker service `boocode_db`) |
+|codecontext|internal `:8080`|Code graph sidecar (Docker network only) |
 
-What v1 does not have lives in v2 (terminal pane) and v3 (Coder pane).
+## What's shipped
+
+- **BooChat**: streaming chat, file-read tools, compaction, reasoning support, HTML/Markdown artifact panes, cross-repo read grants, MCP client (Context7 + multi-server), tool-cost tracking, skills system, agent registry, provider picker with model discovery
+- **BooTerm**: in-browser terminal panes via tmux + xterm.js, per-session tmux sessions, SSH-out support
+- **BooCoder**: write tools (`edit_file`, `create_file`, `delete_file`, `apply_pending`, `rewind`), pending-changes queue with diff UI, ACP/PTY dual-path agent dispatch, MCP server (6 tools, stdio), CLI client, human inbox, Boomerang orchestration, path-guard fuzz suite

apps/coder/.env.host

@@ -0,0 +1,15 @@
+NODE_ENV=production
+PORT=9502
+HOST=100.114.205.53
+DATABASE_URL=postgres://boocode:devpass@127.0.0.1:5500/boochat
+LLAMA_SWAP_URL=http://100.101.41.16:8401
+PROJECT_ROOT_WHITELIST=/opt
+BOOTSTRAP_ROOT=/opt/projects
+DEFAULT_MODEL=qwen3.6-35b-a3b-mxfp4
+LOG_LEVEL=info
+SEARXNG_URL=http://100.114.205.53:8888
+GITEA_BASE_URL=https://git.indifferentketchup.com
+GITEA_USER=indifferentketchup
+GITEA_SSH_HOST=100.114.205.53:2222
+MCP_CONFIG_PATH=/data/mcp.json
+SKILLS_ROOT=/opt/boocode/data/skills

apps/coder/Dockerfile

@@ -23,7 +23,7 @@ RUN pnpm deploy --filter=@boocode/coder --prod --legacy /out/coder
 
 
 FROM node:20-bookworm-slim AS runtime
-RUN apt-get update && apt-get install -y --no-install-recommends ripgrep git && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ripgrep git openssh-client && rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 
 COPY --from=builder /out/coder ./

apps/coder/package.json

@@ -8,19 +8,24 @@
     "dev": "tsx watch src/index.ts",
     "build": "tsc && node -e \"import('node:fs').then(fs=>fs.copyFileSync('src/schema.sql','dist/schema.sql'))\"",
     "start": "node dist/index.js",
+    "cli": "tsx src/cli.ts",
     "typecheck": "tsc --noEmit",
     "test": "vitest run"
   },
   "dependencies": {
+    "@agentclientprotocol/sdk": "^0.22.1",
     "@boocode/server": "workspace:*",
     "@fastify/static": "^7.0.4",
     "@fastify/websocket": "^10.0.1",
+    "@modelcontextprotocol/sdk": "^1.29.0",
     "fastify": "^4.28.1",
     "postgres": "^3.4.4",
+    "ws": "^8.18.0",
     "zod": "^3.23.8"
   },
   "devDependencies": {
     "@types/node": "^20.14.10",
+    "@types/ws": "^8.5.10",
     "tsx": "^4.16.2",
     "typescript": "^5.5.0",
     "vitest": "^3.0.0"

apps/coder/src/cli.ts

@@ -0,0 +1,249 @@
+#!/usr/bin/env node
+/**
+ * BooCoder CLI client.
+ *
+ * Usage:
+ *   boocode run "task description" [--agent opencode] [--model claude-opus-4-7] [--project <id>]
+ *   boocode ls [--state pending|running|completed|failed]
+ *   boocode attach <task-id>
+ *   boocode send <task-id> "message"
+ */
+import { WebSocket } from 'ws';
+
+const BASE_URL = process.env.BOOCODER_URL ?? 'http://100.114.205.53:9502';
+
+// ─── Arg parsing ─────────────────────────────────────────────────────────────
+
+function getFlag(args: string[], name: string): string | undefined {
+  const idx = args.indexOf(name);
+  if (idx === -1 || idx + 1 >= args.length) return undefined;
+  return args[idx + 1];
+}
+
+function hasFlag(args: string[], name: string): boolean {
+  return args.includes(name);
+}
+
+// ─── HTTP helpers ────────────────────────────────────────────────────────────
+
+async function api(method: string, path: string, body?: unknown): Promise<unknown> {
+  const url = `${BASE_URL}${path}`;
+  const res = await fetch(url, {
+    method,
+    headers: body ? { 'Content-Type': 'application/json' } : undefined,
+    body: body ? JSON.stringify(body) : undefined,
+  });
+  if (!res.ok) {
+    const text = await res.text().catch(() => '');
+    throw new Error(`${method} ${path} → ${res.status}: ${text}`);
+  }
+  return res.json();
+}
+
+// ─── WS streaming ────────────────────────────────────────────────────────────
+
+function streamSession(sessionId: string): void {
+  const wsUrl = BASE_URL.replace(/^http/, 'ws') + `/api/ws/sessions/${sessionId}`;
+  const ws = new WebSocket(wsUrl);
+
+  ws.on('message', (data) => {
+    try {
+      const frame = JSON.parse(data.toString()) as { type: string; content?: string; name?: string; arguments?: string };
+      if (frame.type === 'delta' && frame.content) {
+        process.stdout.write(frame.content);
+      } else if (frame.type === 'tool_call') {
+        process.stdout.write(`\n[tool: ${frame.name ?? '?'}(${(frame.arguments ?? '').slice(0, 80)})]\n`);
+      } else if (frame.type === 'tool_result') {
+        process.stdout.write(`[tool_result]\n`);
+      } else if (frame.type === 'status' || frame.type === 'chat_status') {
+        // Silent
+      }
+    } catch {
+      // Non-JSON frame, ignore
+    }
+  });
+
+  ws.on('error', (err) => {
+    process.stderr.write(`WS error: ${err.message}\n`);
+  });
+
+  ws.on('close', () => {
+    process.stdout.write('\n');
+    process.exit(0);
+  });
+
+  process.on('SIGINT', () => {
+    ws.close();
+    process.exit(0);
+  });
+}
+
+// ─── Commands ────────────────────────────────────────────────────────────────
+
+async function cmdRun(args: string[]): Promise<void> {
+  const input = args.find((a) => !a.startsWith('--'));
+  if (!input) {
+    process.stderr.write('Usage: boocode run "task description" [--agent X] [--model X] [--project X]\n');
+    process.exit(1);
+  }
+
+  const agent = getFlag(args, '--agent');
+  const model = getFlag(args, '--model');
+  const project_id = getFlag(args, '--project');
+
+  if (!project_id) {
+    process.stderr.write('Error: --project <uuid> is required\n');
+    process.exit(1);
+  }
+
+  const result = (await api('POST', '/api/tasks', {
+    project_id,
+    input,
+    ...(agent && { agent }),
+    ...(model && { model }),
+  })) as { id: string; state: string };
+
+  process.stdout.write(`Task created: ${result.id} (state: ${result.state})\n`);
+
+  // Poll until task has session_id, then stream; or poll until terminal state
+  const POLL_MS = 2000;
+  for (;;) {
+    await sleep(POLL_MS);
+    const task = (await api('GET', `/api/tasks/${result.id}`)) as {
+      id: string; state: string; session_id?: string; output_summary?: string;
+    };
+
+    if (task.session_id) {
+      process.stdout.write(`Streaming session ${task.session_id}...\n`);
+      streamSession(task.session_id);
+      return; // streamSession handles exit
+    }
+
+    if (task.state === 'completed') {
+      process.stdout.write(`\nCompleted: ${task.output_summary ?? '(no summary)'}\n`);
+      return;
+    }
+    if (task.state === 'failed') {
+      process.stderr.write(`\nFailed: ${task.output_summary ?? '(no summary)'}\n`);
+      process.exit(1);
+    }
+    if (task.state === 'cancelled') {
+      process.stderr.write(`\nCancelled.\n`);
+      process.exit(1);
+    }
+  }
+}
+
+async function cmdLs(args: string[]): Promise<void> {
+  const state = getFlag(args, '--state');
+  const query = state ? `?state=${state}` : '';
+  const tasks = (await api('GET', `/api/tasks${query}`)) as Array<{
+    id: string; state: string; agent: string | null; input: string; created_at: string;
+  }>;
+
+  if (tasks.length === 0) {
+    process.stdout.write('No tasks.\n');
+    return;
+  }
+
+  // Table header
+  process.stdout.write(
+    pad('ID', 38) + pad('STATE', 12) + pad('AGENT', 14) + pad('INPUT', 52) + 'CREATED\n',
+  );
+  process.stdout.write('-'.repeat(120) + '\n');
+
+  for (const t of tasks) {
+    process.stdout.write(
+      pad(t.id, 38) +
+      pad(t.state, 12) +
+      pad(t.agent ?? '-', 14) +
+      pad(t.input.slice(0, 50), 52) +
+      (t.created_at?.slice(0, 19) ?? '') + '\n',
+    );
+  }
+}
+
+async function cmdAttach(args: string[]): Promise<void> {
+  const taskId = args[0];
+  if (!taskId) {
+    process.stderr.write('Usage: boocode attach <task-id>\n');
+    process.exit(1);
+  }
+
+  const task = (await api('GET', `/api/tasks/${taskId}`)) as { session_id?: string };
+  if (!task.session_id) {
+    process.stderr.write('Task has no session yet (still pending?).\n');
+    process.exit(1);
+  }
+
+  streamSession(task.session_id);
+}
+
+async function cmdSend(args: string[]): Promise<void> {
+  const taskId = args[0];
+  const message = args[1];
+  if (!taskId || !message) {
+    process.stderr.write('Usage: boocode send <task-id> "message"\n');
+    process.exit(1);
+  }
+
+  const task = (await api('GET', `/api/tasks/${taskId}`)) as { session_id?: string };
+  if (!task.session_id) {
+    process.stderr.write('Task has no session yet.\n');
+    process.exit(1);
+  }
+
+  // Find active chat
+  const sessionId = task.session_id;
+  // POST message to the session's chat (the messages route expects session_id in path)
+  await api('POST', `/api/sessions/${sessionId}/messages`, { content: message });
+
+  // Then attach to stream the response
+  streamSession(sessionId);
+}
+
+// ─── Utils ───────────────────────────────────────────────────────────────────
+
+function pad(s: string, width: number): string {
+  return s.length >= width ? s.slice(0, width) : s + ' '.repeat(width - s.length);
+}
+
+function sleep(ms: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+// ─── Main ────────────────────────────────────────────────────────────────────
+
+const [cmd, ...rest] = process.argv.slice(2);
+
+switch (cmd) {
+  case 'run':
+    cmdRun(rest).catch(fatal);
+    break;
+  case 'ls':
+    cmdLs(rest).catch(fatal);
+    break;
+  case 'attach':
+    cmdAttach(rest).catch(fatal);
+    break;
+  case 'send':
+    cmdSend(rest).catch(fatal);
+    break;
+  default:
+    process.stdout.write(
+      'BooCoder CLI\n\n' +
+      'Commands:\n' +
+      '  run "task"  [--agent X] [--model X] [--project <id>]   Create and stream a task\n' +
+      '  ls          [--state pending|running|completed|failed]   List tasks\n' +
+      '  attach      <task-id>                                    Stream a running task\n' +
+      '  send        <task-id> "message"                          Send input to a task\n' +
+      '\n' +
+      `Base URL: ${BASE_URL} (set BOOCODER_URL to override)\n`,
+    );
+    if (cmd && cmd !== '--help' && cmd !== '-h') process.exit(1);
+}
+
+function fatal(err: unknown): void {
+  process.stderr.write(`Error: ${err instanceof Error ? err.message : String(err)}\n`);
+  process.exit(1);
+}

apps/coder/src/config.ts

@@ -23,6 +23,11 @@ const ConfigSchema = z.object({
   GITEA_TOKEN: z.string().optional(),
   GITEA_SSH_HOST: z.string().default('100.114.205.53:2222'),
   MCP_CONFIG_PATH: z.string().optional(),
+  // v2.0.5: cheaper model for titles, summaries, labeling.
+  FAST_MODEL: z.string().optional(),
+  // SSH access to the host for external agent dispatch (Phase 5)
+  BOOCODER_SSH_HOST: z.string().default('100.114.205.53'),
+  BOOCODER_SSH_USER: z.string().default('samkintop'),
 });
 
 export type Config = z.infer<typeof ConfigSchema>;

apps/coder/src/index.ts

@@ -9,6 +9,7 @@ const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 import { loadConfig } from './config.js';
 import { getSql, applySchema, pingDb, closeDb } from './db.js';
+import { startMcpServer } from './services/mcp-server.js';
 // v2.0.0 Phase 2B: workspace dependency on @boocode/server — reuse the
 // inference loop, broker, and tool registry without duplication.
 import { createInferenceRunner } from '@boocode/server/inference';
@@ -22,10 +23,31 @@ import { adaptWriteTool } from './services/tools/adapter.js';
 import { setInferenceContext, clearInferenceContext } from './services/tools/inference_context.js';
 // Routes
 import { registerMessageRoutes } from './routes/messages.js';
+import { registerSkillRoutes } from './routes/skills.js';
 import { registerPendingRoutes } from './routes/pending.js';
+import { registerTaskRoutes } from './routes/tasks.js';
+import { registerInboxRoutes } from './routes/inbox.js';
+import { registerStatsRoutes } from './routes/stats.js';
+import { registerArenaRoutes } from './routes/arena.js';
+import { registerProviderRoutes } from './routes/providers.js';
 import { registerWebSocket } from './routes/ws.js';
+// Phase 4: dispatcher + agent probe
+import { createDispatcher } from './services/dispatcher.js';
+import { probeAgents } from './services/agent-probe.js';
+import { getProviderSnapshot, persistProbedModels } from './services/provider-snapshot.js';
+import { setPermissionHooks } from './services/permission-waiter.js';
+import { homedir } from 'node:os';
 
 async function main() {
+  // MCP mode: stdio transport, no HTTP server
+  if (process.argv.includes('--mcp')) {
+    const config = loadConfig();
+    const sql = getSql(config);
+    await applySchema(sql);
+    await startMcpServer(sql);
+    return;
+  }
+
   const config = loadConfig();
 
   const app = Fastify({
@@ -54,6 +76,31 @@ async function main() {
   // Broker: in-memory pub/sub for session + user channel streaming.
   const broker = createBroker(app.log);
 
+  setPermissionHooks({
+    onPrompt: async (prompt) => {
+      await sql`
+        UPDATE tasks SET state = 'blocked' WHERE id = ${prompt.taskId} AND state = 'running'
+      `;
+      broker.publishFrame(prompt.sessionId, {
+        type: 'permission_requested',
+        task_id: prompt.taskId,
+        session_id: prompt.sessionId,
+        tool_title: prompt.toolTitle,
+        options: prompt.options.map((o) => ({ option_id: o.optionId, label: o.label })),
+      } as WsFrame);
+    },
+    onResolved: async (taskId, sessionId) => {
+      await sql`
+        UPDATE tasks SET state = 'running' WHERE id = ${taskId} AND state = 'blocked'
+      `;
+      broker.publishFrame(sessionId, {
+        type: 'permission_resolved',
+        task_id: taskId,
+        session_id: sessionId,
+      } as WsFrame);
+    },
+  });
+
   // --- Tool registry extension ---
   // Append BooCoder write tools (adapted to BooChat's ToolDef interface) to
   // the shared ALL_TOOLS registry. appendMcpTools re-sorts and rebuilds
@@ -113,9 +160,33 @@ async function main() {
     });
   });
 
+  // Phase 4: probe available agents on startup
+  await probeAgents(sql, app.log);
+
+  // Warm provider snapshot in background (ACP cold probes + model merges)
+  void getProviderSnapshot(sql, config, homedir(), true)
+    .then((entries) => persistProbedModels(sql, entries, app.log))
+    .catch((err) => {
+      app.log.warn(
+        { err: err instanceof Error ? err.message : String(err) },
+        'provider-snapshot: warm failed',
+      );
+    });
+
+  // Phase 4: dispatcher — polls tasks table and runs inference
+  const dispatcher = createDispatcher({ sql, inference: inferenceApi, broker, log: app.log, config });
+  dispatcher.start();
+  app.addHook('onClose', () => dispatcher.stop());
+
   // Register routes
   registerMessageRoutes(app, sql, broker, inferenceApi);
+  registerSkillRoutes(app, sql, broker, inferenceApi);
   registerPendingRoutes(app, sql);
+  registerTaskRoutes(app, sql, inferenceApi);
+  registerInboxRoutes(app, sql);
+  registerStatsRoutes(app, sql);
+  registerArenaRoutes(app, sql);
+  registerProviderRoutes(app, sql, config);
   registerWebSocket(app, sql, broker);
 
   // Serve static frontend (built web app). In production, the dist/ is

apps/coder/src/routes/arena.ts

@@ -0,0 +1,136 @@
+/**
+ * v2.0.5: Arena routes — competitive dispatch of the same task to multiple agents.
+ *
+ * POST /api/arena        — create an arena with 2-5 contestants
+ * GET  /api/arena/:id    — get all tasks in an arena
+ * POST /api/arena/:id/select/:task_id — mark a task as the arena winner
+ */
+import type { FastifyInstance } from 'fastify';
+import { z } from 'zod';
+import type { Sql } from '../db.js';
+
+const ContestantSchema = z.object({
+  agent: z.string().max(100).optional(),
+  model: z.string().max(200).optional(),
+  mode_id: z.string().max(200).optional(),
+  thinking_option_id: z.string().max(200).optional(),
+});
+
+const CreateArenaBody = z.object({
+  project_id: z.string().uuid(),
+  input: z.string().min(1).max(64_000),
+  contestants: z.array(ContestantSchema).min(2).max(5),
+});
+
+interface TaskRow {
+  id: string;
+  agent: string | null;
+  model: string | null;
+  mode_id: string | null;
+  thinking_option_id: string | null;
+  state: string;
+}
+
+export function registerArenaRoutes(app: FastifyInstance, sql: Sql): void {
+  // POST /api/arena — create a new arena
+  app.post('/api/arena', async (req, reply) => {
+    const parsed = CreateArenaBody.safeParse(req.body);
+    if (!parsed.success) {
+      reply.code(400);
+      return { error: 'invalid body', details: parsed.error.flatten() };
+    }
+
+    const { project_id, input, contestants } = parsed.data;
+    const arenaId = crypto.randomUUID();
+
+    const tasks: TaskRow[] = [];
+    for (const contestant of contestants) {
+      const [task] = await sql<TaskRow[]>`
+        INSERT INTO tasks (project_id, input, agent, model, mode_id, thinking_option_id, arena_id)
+        VALUES (
+          ${project_id},
+          ${input},
+          ${contestant.agent ?? null},
+          ${contestant.model ?? null},
+          ${contestant.mode_id ?? null},
+          ${contestant.thinking_option_id ?? null},
+          ${arenaId}
+        )
+        RETURNING id, agent, model, mode_id, thinking_option_id, state
+      `;
+      tasks.push(task!);
+    }
+
+    reply.code(201);
+    return {
+      arena_id: arenaId,
+      tasks: tasks.map((t) => ({
+        id: t.id,
+        agent: t.agent,
+        model: t.model,
+        mode_id: t.mode_id,
+        thinking_option_id: t.thinking_option_id,
+        state: t.state,
+      })),
+    };
+  });
+
+  // GET /api/arena/:arena_id — list all tasks in an arena
+  app.get<{ Params: { arena_id: string } }>('/api/arena/:arena_id', async (req, reply) => {
+    const { arena_id } = req.params;
+
+    // Validate UUID format
+    const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+    if (!uuidRegex.test(arena_id)) {
+      reply.code(400);
+      return { error: 'invalid arena_id format' };
+    }
+
+    const tasks = await sql`
+      SELECT id, project_id, state, input, output_summary, agent, model, mode_id, thinking_option_id, execution_path, session_id, started_at, ended_at, created_at, arena_id
+      FROM tasks
+      WHERE arena_id = ${arena_id}
+      ORDER BY created_at
+    `;
+
+    if (tasks.length === 0) {
+      reply.code(404);
+      return { error: 'arena not found' };
+    }
+
+    return { arena_id, tasks };
+  });
+
+  // POST /api/arena/:arena_id/select/:task_id — mark the winner
+  app.post<{ Params: { arena_id: string; task_id: string } }>(
+    '/api/arena/:arena_id/select/:task_id',
+    async (req, reply) => {
+      const { arena_id, task_id } = req.params;
+
+      // Verify the task belongs to this arena
+      const rows = await sql<{ id: string; state: string; arena_id: string | null }[]>`
+        SELECT id, state, arena_id FROM tasks WHERE id = ${task_id}
+      `;
+
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'task not found' };
+      }
+
+      const task = rows[0]!;
+      if (task.arena_id !== arena_id) {
+        reply.code(409);
+        return { error: 'task does not belong to this arena' };
+      }
+
+      // Mark as selected via output_summary prefix (lightweight — no schema change)
+      await sql`
+        UPDATE tasks
+        SET output_summary = COALESCE('[SELECTED] ' || output_summary, '[SELECTED]')
+        WHERE id = ${task_id}
+      `;
+
+      return { selected: true, task_id, arena_id };
+    }
+  );
+}

apps/coder/src/routes/chat-resolve.ts

@@ -0,0 +1,81 @@
+import type { Sql } from '../db.js';
+
+interface WorkspacePaneRow {
+  id: string;
+  kind: string;
+  chatId?: string;
+  chatIds?: string[];
+  activeChatIdx?: number;
+}
+
+function chatNameForKind(kind: string): string {
+  if (kind === 'coder' || kind === 'agent') return 'BooCoder';
+  if (kind === 'terminal') return 'Terminal';
+  return 'Chat';
+}
+
+function activeChatIdForPane(pane: WorkspacePaneRow): string | undefined {
+  const chatIds = pane.chatIds ?? [];
+  const idx = pane.activeChatIdx ?? 0;
+  if (idx >= 0 && idx < chatIds.length) return chatIds[idx];
+  return pane.chatId;
+}
+
+/** Resolve the active chat for a workspace pane; auto-seed when empty. */
+export async function resolveChatId(
+  sql: Sql,
+  sessionId: string,
+  paneId: string,
+): Promise<string | null> {
+  return sql.begin(async (tx) => {
+    const sessionRows = await tx<{ workspace_panes: WorkspacePaneRow[] }[]>`
+      SELECT workspace_panes FROM sessions WHERE id = ${sessionId} FOR UPDATE
+    `;
+    if (sessionRows.length === 0) return null;
+
+    const panes = sessionRows[0]!.workspace_panes ?? [];
+    const paneIdx = panes.findIndex((p) => p.id === paneId);
+    if (paneIdx < 0) return null;
+
+    const pane = panes[paneIdx]!;
+    const existingChatId = activeChatIdForPane(pane);
+    if (existingChatId) {
+      const chatRows = await tx<{ id: string }[]>`
+        SELECT id FROM chats
+        WHERE id = ${existingChatId}
+          AND session_id = ${sessionId}
+          AND status = 'open'
+      `;
+      if (chatRows.length > 0) return existingChatId;
+    }
+
+    const [newChat] = await tx<{ id: string }[]>`
+      INSERT INTO chats (session_id, name, status)
+      VALUES (${sessionId}, ${chatNameForKind(pane.kind)}, 'open')
+      RETURNING id
+    `;
+    if (!newChat) return null;
+
+    const nextChatIds = [...(pane.chatIds ?? []), newChat.id];
+    const nextActiveIdx = nextChatIds.length - 1;
+    const nextPanes = panes.map((p, i) =>
+      i === paneIdx
+        ? {
+            ...p,
+            chatIds: nextChatIds,
+            activeChatIdx: nextActiveIdx,
+            chatId: newChat.id,
+          }
+        : p,
+    );
+
+    await tx`
+      UPDATE sessions
+      SET workspace_panes = ${tx.json(nextPanes as never)},
+          updated_at = clock_timestamp()
+      WHERE id = ${sessionId}
+    `;
+
+    return newChat.id;
+  });
+}

apps/coder/src/routes/inbox.ts

@@ -0,0 +1,33 @@
+import type { FastifyInstance } from 'fastify';
+import type { Sql } from '../db.js';
+
+export function registerInboxRoutes(app: FastifyInstance, sql: Sql): void {
+  // GET /api/inbox — tasks needing human attention (blocked or failed)
+  app.get('/api/inbox', async () => {
+    return sql`
+      SELECT id, project_id, parent_task_id, state, input, output_summary, agent, model, session_id, started_at, ended_at, created_at
+      FROM human_inbox
+      ORDER BY created_at DESC
+      LIMIT 100
+    `;
+  });
+
+  // POST /api/inbox/:id/retry — reset a blocked/failed task to pending for re-dispatch
+  app.post<{ Params: { id: string } }>('/api/inbox/:id/retry', async (req, reply) => {
+    const taskId = req.params.id;
+
+    const result = await sql`
+      UPDATE tasks
+      SET state = 'pending', started_at = NULL, ended_at = NULL, output_summary = NULL
+      WHERE id = ${taskId} AND state IN ('blocked', 'failed')
+      RETURNING id, state
+    `;
+
+    if (result.length === 0) {
+      reply.code(404);
+      return { error: 'task not found or not in retryable state' };
+    }
+
+    return { id: result[0]!.id, state: result[0]!.state };
+  });
+}

apps/coder/src/routes/messages.ts

@@ -3,10 +3,16 @@ import { z } from 'zod';
 import type { Sql } from '../db.js';
 import type { Broker } from '@boocode/server/broker';
 import type { WsFrame } from '@boocode/server/ws-frames';
+import { resolveChatId } from './chat-resolve.js';
 
 const SendBody = z.object({
   content: z.string().min(1).max(64_000),
-  chat_id: z.string().uuid(),
+  pane_id: z.string().min(1).max(200),
+  chat_id: z.string().uuid().optional(),
+  provider: z.string().max(100).optional(),
+  model: z.string().max(200).optional(),
+  mode_id: z.string().max(200).optional(),
+  thinking_option_id: z.string().max(200).optional(),
 });
 
 interface InferenceApi {
@@ -15,12 +21,100 @@ interface InferenceApi {
   hasActive: (chatId: string) => boolean;
 }
 
+interface MessageRow {
+  id: string;
+  role: string;
+  content: string | null;
+  status: string | null;
+  tool_calls: Array<{ id: string; name: string; args?: Record<string, unknown> }> | null;
+  tool_results: {
+    tool_call_id: string;
+    output: unknown;
+    truncated?: boolean;
+    error?: string;
+  } | null;
+  reasoning_parts: Array<{ text?: string }> | null;
+}
+
+function mapCoderMessageRow(row: MessageRow) {
+  if (row.role === 'tool') {
+    if (!row.tool_results?.tool_call_id) return null;
+    return {
+      id: row.id,
+      role: 'tool' as const,
+      tool_results: row.tool_results,
+    };
+  }
+  if (row.role !== 'user' && row.role !== 'assistant' && row.role !== 'system') {
+    return null;
+  }
+  const tool_calls = row.tool_calls?.map((tc) => ({
+    id: tc.id,
+    function: {
+      name: tc.name,
+      arguments: JSON.stringify(tc.args ?? {}),
+    },
+  }));
+  const reasoningText = row.reasoning_parts?.map((p) => p.text ?? '').join('') ?? '';
+  return {
+    id: row.id,
+    role: row.role as 'user' | 'assistant' | 'system',
+    content: row.content ?? '',
+    status: (row.status ?? 'complete') as 'streaming' | 'complete' | 'failed',
+    ...(reasoningText ? { reasoning_text: reasoningText } : {}),
+    ...(tool_calls?.length ? { tool_calls } : {}),
+  };
+}
+
 export function registerMessageRoutes(
   app: FastifyInstance,
   sql: Sql,
   broker: Broker,
   inference: InferenceApi,
 ): void {
+  // GET /api/sessions/:sessionId/messages — hydrate CoderPane on load / reconnect
+  app.get<{ Params: { sessionId: string }; Querystring: { chat_id?: string } }>(
+    '/api/sessions/:sessionId/messages',
+    async (req, reply) => {
+      const sessionId = req.params.sessionId;
+      const chatId = req.query.chat_id;
+      const sessionRows = await sql<{ id: string }[]>`
+        SELECT id FROM sessions WHERE id = ${sessionId}
+      `;
+      if (sessionRows.length === 0) {
+        reply.code(404);
+        return { error: 'session not found' };
+      }
+
+      if (chatId) {
+        const chatRows = await sql<{ id: string }[]>`
+          SELECT id FROM chats
+          WHERE id = ${chatId} AND session_id = ${sessionId} AND status = 'open'
+        `;
+        if (chatRows.length === 0) {
+          reply.code(404);
+          return { error: 'chat not found or not open in this session' };
+        }
+      }
+
+      const rows = chatId
+        ? await sql<MessageRow[]>`
+            SELECT id, role, content, status, tool_calls, tool_results, reasoning_parts
+            FROM messages_with_parts
+            WHERE session_id = ${sessionId} AND chat_id = ${chatId}
+            ORDER BY created_at ASC, id ASC
+          `
+        : await sql<MessageRow[]>`
+            SELECT id, role, content, status, tool_calls, tool_results, reasoning_parts
+            FROM messages_with_parts
+            WHERE session_id = ${sessionId}
+            ORDER BY created_at ASC, id ASC
+          `;
+
+      return rows.map(mapCoderMessageRow).filter((m) => m !== null);
+    },
+  );
+
   // POST /api/sessions/:sessionId/messages — send a user message + kick off inference
   app.post<{ Params: { sessionId: string } }>(
     '/api/sessions/:sessionId/messages',
@@ -32,73 +126,96 @@ export function registerMessageRoutes(
       }
 
       const sessionId = req.params.sessionId;
-      const { content, chat_id: chatId } = parsed.data;
+      const { content, pane_id, chat_id: explicitChatId, provider, model, mode_id, thinking_option_id } =
+        parsed.data;
+      const isExternal = provider && provider !== 'boocode';
 
       // Validate session exists
-      const sessionRows = await sql<{ id: string }[]>`
-        SELECT id FROM sessions WHERE id = ${sessionId}
+      const sessionRows = await sql<{ id: string; project_id: string }[]>`
+        SELECT id, project_id FROM sessions WHERE id = ${sessionId}
       `;
       if (sessionRows.length === 0) {
         reply.code(404);
         return { error: 'session not found' };
       }
 
-      // Validate chat belongs to session and is open
-      const chatRows = await sql<{ id: string; session_id: string }[]>`
-        SELECT id, session_id FROM chats WHERE id = ${chatId} AND session_id = ${sessionId} AND status = 'open'
-      `;
-      if (chatRows.length === 0) {
+      const resolved = await resolveChatId(sql, sessionId, pane_id);
+      if (!resolved) {
         reply.code(404);
-        return { error: 'chat not found or not open in this session' };
+        return { error: 'pane not found' };
       }
 
-      // Reject if inference is already running on this chat
-      if (inference.hasActive(chatId)) {
-        reply.code(409);
-        return { error: 'inference already running on this chat' };
+      let chatId = resolved;
+      if (explicitChatId) {
+        const chatRows = await sql<{ id: string }[]>`
+          SELECT id FROM chats WHERE id = ${explicitChatId} AND session_id = ${sessionId} AND status = 'open'
+        `;
+        if (chatRows.length === 0) {
+          reply.code(404);
+          return { error: 'chat not found or not open in this session' };
+        }
+        chatId = explicitChatId;
       }
 
-      // Create user message + streaming assistant row in a transaction
-      const result = await sql.begin(async (tx) => {
-        const [userMsg] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
-          VALUES (${sessionId}, ${chatId}, 'user', ${content}, 'complete', clock_timestamp())
-          RETURNING id
-        `;
-        const [assistantMsg] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
-          VALUES (${sessionId}, ${chatId}, 'assistant', '', 'streaming', clock_timestamp())
-          RETURNING id
-        `;
-        await tx`UPDATE sessions SET updated_at = clock_timestamp() WHERE id = ${sessionId}`;
-        await tx`UPDATE chats SET updated_at = clock_timestamp() WHERE id = ${chatId}`;
-        return { user_message_id: userMsg!.id, assistant_message_id: assistantMsg!.id };
-      });
+      if (!isExternal) {
+        // Reject if inference is already running on this chat
+        if (inference.hasActive(chatId)) {
+          reply.code(409);
+          return { error: 'inference already running on this chat' };
+        }
+      }
 
-      // Publish user message frames so WS subscribers see it immediately
+      // Create user message
+      const [userMsg] = await sql<{ id: string }[]>`
+        INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+        VALUES (${sessionId}, ${chatId}, 'user', ${content}, 'complete', clock_timestamp())
+        RETURNING id
+      `;
+      await sql`UPDATE sessions SET updated_at = clock_timestamp() WHERE id = ${sessionId}`;
+      await sql`UPDATE chats SET updated_at = clock_timestamp() WHERE id = ${chatId}`;
+
+      // Publish user message frames
       broker.publishFrame(sessionId, {
         type: 'message_started',
-        message_id: result.user_message_id,
+        message_id: userMsg!.id,
         chat_id: chatId,
         role: 'user',
       } as unknown as WsFrame);
       broker.publishFrame(sessionId, {
         type: 'delta',
-        message_id: result.user_message_id,
+        message_id: userMsg!.id,
         chat_id: chatId,
         content,
       } as unknown as WsFrame);
       broker.publishFrame(sessionId, {
         type: 'message_complete',
-        message_id: result.user_message_id,
+        message_id: userMsg!.id,
         chat_id: chatId,
       } as unknown as WsFrame);
 
-      // Enqueue inference — the runner will stream assistant deltas via broker
-      inference.enqueue(sessionId, chatId, result.assistant_message_id, 'default');
+      if (isExternal) {
+        // External provider: create a task for the dispatcher
+        const projectId = sessionRows[0]!.project_id;
+        const [task] = await sql<{ id: string; state: string }[]>`
+          INSERT INTO tasks (project_id, input, agent, model, mode_id, thinking_option_id, session_id)
+          VALUES (${projectId}, ${content}, ${provider}, ${model ?? null}, ${mode_id ?? null}, ${thinking_option_id ?? null}, ${sessionId})
+          RETURNING id, state
+        `;
+        reply.code(202);
+        return { user_message_id: userMsg!.id, task_id: task!.id, dispatched: true };
+      }
+
+      // Native provider: create streaming assistant row + enqueue inference
+      const [assistantMsg] = await sql<{ id: string }[]>`
+        INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+        VALUES (${sessionId}, ${chatId}, 'assistant', '', 'streaming', clock_timestamp())
+        RETURNING id
+      `;
+
+      inference.enqueue(sessionId, chatId, assistantMsg!.id, 'default');
 
       reply.code(202);
-      return result;
+      return { user_message_id: userMsg!.id, assistant_message_id: assistantMsg!.id };
     },
   );
 

apps/coder/src/routes/providers.ts

@@ -0,0 +1,17 @@
+import type { FastifyInstance } from 'fastify';
+import type { Sql } from '../db.js';
+import type { Config } from '../config.js';
+import { getProviderSnapshot, clearProviderSnapshotCache } from '../services/provider-snapshot.js';
+
+export function registerProviderRoutes(app: FastifyInstance, sql: Sql, config: Config): void {
+  app.get<{ Querystring: { cwd?: string } }>('/api/providers/snapshot', async (req, _reply) => {
+    const cwd = req.query.cwd;
+    return getProviderSnapshot(sql, config, cwd);
+  });
+
+  app.post('/api/providers/refresh', async (_req, _reply) => {
+    clearProviderSnapshotCache();
+    const entries = await getProviderSnapshot(sql, config, undefined, true);
+    return { refreshed: entries.length };
+  });
+}

apps/coder/src/routes/skills.ts

@@ -0,0 +1,93 @@
+import type { FastifyInstance } from 'fastify';
+import { z } from 'zod';
+import type { Sql } from '../db.js';
+import type { Broker } from '@boocode/server/broker';
+import type { WsFrame } from '@boocode/server/ws-frames';
+import { getSkillBody } from '@boocode/server/skills';
+import {
+  buildSkillInvokeSyntheticFrames,
+  buildSkillInvokeUserFrames,
+  DEFAULT_SKILL_USER_MESSAGE,
+  runSkillInvokeTransaction,
+} from '@boocode/server/skill-invoke';
+import { resolveChatId } from './chat-resolve.js';
+
+const SkillInvokeBody = z.object({
+  pane_id: z.string().min(1).max(200),
+  skill_name: z.string().min(1),
+  user_message: z.string().max(64_000).nullable().optional(),
+});
+
+interface InferenceApi {
+  enqueue: (sessionId: string, chatId: string, assistantId: string, user: string) => void;
+  hasActive: (chatId: string) => boolean;
+}
+
+export function registerSkillRoutes(
+  app: FastifyInstance,
+  sql: Sql,
+  broker: Broker,
+  inference: InferenceApi,
+): void {
+  app.post<{ Params: { sessionId: string } }>(
+    '/api/sessions/:sessionId/skill_invoke',
+    async (req, reply) => {
+      const parsed = SkillInvokeBody.safeParse(req.body);
+      if (!parsed.success) {
+        reply.code(400);
+        return { error: 'invalid body', details: parsed.error.flatten() };
+      }
+
+      const sessionId = req.params.sessionId;
+      const { pane_id, skill_name } = parsed.data;
+      const sessionRows = await sql<{ id: string }[]>`
+        SELECT id FROM sessions WHERE id = ${sessionId}
+      `;
+      if (sessionRows.length === 0) {
+        reply.code(404);
+        return { error: 'session not found' };
+      }
+
+      const chatId = await resolveChatId(sql, sessionId, pane_id);
+      if (!chatId) {
+        reply.code(404);
+        return { error: 'pane not found' };
+      }
+
+      if (inference.hasActive(chatId)) {
+        reply.code(409);
+        return { error: 'inference already running on this chat' };
+      }
+
+      const userText = parsed.data.user_message?.trim()
+        ? parsed.data.user_message
+        : DEFAULT_SKILL_USER_MESSAGE;
+
+      const body = await getSkillBody(skill_name);
+      if (body === null) {
+        reply.code(404);
+        return { error: 'unknown_skill', message: `unknown skill: ${skill_name}` };
+      }
+
+      const { result, toolCall } = await runSkillInvokeTransaction(sql, {
+        sessionId,
+        chatId,
+        skillName: skill_name,
+        skillBody: body,
+        userText,
+      });
+
+      for (const frame of buildSkillInvokeSyntheticFrames(chatId, result, toolCall, body)) {
+        broker.publishFrame(sessionId, frame as WsFrame);
+      }
+      for (const frame of buildSkillInvokeUserFrames(chatId, result.user_message_id, userText)) {
+        broker.publishFrame(sessionId, frame as WsFrame);
+      }
+
+      inference.enqueue(sessionId, chatId, result.assistant_message_id, 'default');
+
+      reply.code(202);
+      return result;
+    },
+  );
+}

apps/coder/src/routes/stats.ts

@@ -0,0 +1,48 @@
+import type { FastifyInstance } from 'fastify';
+import { z } from 'zod';
+import type { Sql } from '../db.js';
+
+const CostQuery = z.object({
+  group_by: z.enum(['project', 'agent', 'day']).default('project'),
+});
+
+export function registerStatsRoutes(app: FastifyInstance, sql: Sql): void {
+  // GET /api/stats/costs — aggregate cost_tokens by project, agent, or day
+  app.get('/api/stats/costs', async (req, reply) => {
+    const parsed = CostQuery.safeParse(req.query);
+    if (!parsed.success) {
+      reply.code(400);
+      return { error: 'invalid query', details: parsed.error.flatten() };
+    }
+
+    const { group_by } = parsed.data;
+
+    switch (group_by) {
+      case 'project':
+        return sql`
+          SELECT project_id, COUNT(*)::int AS task_count, COALESCE(SUM(cost_tokens), 0)::int AS total_tokens
+          FROM tasks
+          WHERE cost_tokens IS NOT NULL
+          GROUP BY project_id
+          ORDER BY total_tokens DESC
+        `;
+      case 'agent':
+        return sql`
+          SELECT COALESCE(agent, 'native') AS agent, COUNT(*)::int AS task_count, COALESCE(SUM(cost_tokens), 0)::int AS total_tokens
+          FROM tasks
+          WHERE cost_tokens IS NOT NULL
+          GROUP BY agent
+          ORDER BY total_tokens DESC
+        `;
+      case 'day':
+        return sql`
+          SELECT DATE(created_at) AS day, COUNT(*)::int AS task_count, COALESCE(SUM(cost_tokens), 0)::int AS total_tokens
+          FROM tasks
+          WHERE cost_tokens IS NOT NULL
+          GROUP BY DATE(created_at)
+          ORDER BY day DESC
+          LIMIT 90
+        `;
+    }
+  });
+}

apps/coder/src/routes/tasks.ts

@@ -0,0 +1,184 @@
+import type { FastifyInstance } from 'fastify';
+import { z } from 'zod';
+import type { Sql } from '../db.js';
+import { getPendingPermission, respondToPermission, cancelPendingPermission } from '../services/permission-waiter.js';
+import { getTaskCommands } from '../services/agent-commands-cache.js';
+
+interface InferenceApi {
+  cancel: (sessionId: string, chatId: string) => Promise<boolean>;
+}
+
+const CreateBody = z.object({
+  project_id: z.string().uuid(),
+  input: z.string().min(1).max(64_000),
+  agent: z.string().max(100).optional(),
+  model: z.string().max(200).optional(),
+  mode_id: z.string().max(200).optional(),
+  thinking_option_id: z.string().max(200).optional(),
+});
+
+const PermissionBody = z.object({
+  option_id: z.string().max(200).nullable(),
+});
+
+const ListQuery = z.object({
+  state: z.enum(['pending', 'running', 'completed', 'failed', 'blocked', 'cancelled']).optional(),
+  project_id: z.string().uuid().optional(),
+});
+
+export function registerTaskRoutes(app: FastifyInstance, sql: Sql, inference: InferenceApi): void {
+  // POST /api/tasks — create a new task
+  app.post('/api/tasks', async (req, reply) => {
+    const parsed = CreateBody.safeParse(req.body);
+    if (!parsed.success) {
+      reply.code(400);
+      return { error: 'invalid body', details: parsed.error.flatten() };
+    }
+
+    const { project_id, input, agent, model, mode_id, thinking_option_id } = parsed.data;
+
+    const [task] = await sql<{ id: string; state: string }[]>`
+      INSERT INTO tasks (project_id, input, agent, model, mode_id, thinking_option_id)
+      VALUES (${project_id}, ${input}, ${agent ?? null}, ${model ?? null}, ${mode_id ?? null}, ${thinking_option_id ?? null})
+      RETURNING id, state
+    `;
+
+    reply.code(201);
+    return { id: task!.id, state: task!.state };
+  });
+
+  // GET /api/tasks — list tasks with optional filters
+  app.get('/api/tasks', async (req, _reply) => {
+    const parsed = ListQuery.safeParse(req.query);
+    if (!parsed.success) {
+      return { error: 'invalid query', details: parsed.error.flatten() };
+    }
+
+    const { state, project_id } = parsed.data;
+
+    // Build query with optional filters
+    if (state && project_id) {
+      return sql`
+        SELECT id, project_id, state, input, output_summary, agent, model, execution_path, session_id, started_at, ended_at, created_at
+        FROM tasks
+        WHERE state = ${state} AND project_id = ${project_id}
+        ORDER BY created_at DESC
+        LIMIT 100
+      `;
+    } else if (state) {
+      return sql`
+        SELECT id, project_id, state, input, output_summary, agent, model, execution_path, session_id, started_at, ended_at, created_at
+        FROM tasks
+        WHERE state = ${state}
+        ORDER BY created_at DESC
+        LIMIT 100
+      `;
+    } else if (project_id) {
+      return sql`
+        SELECT id, project_id, state, input, output_summary, agent, model, execution_path, session_id, started_at, ended_at, created_at
+        FROM tasks
+        WHERE project_id = ${project_id}
+        ORDER BY created_at DESC
+        LIMIT 100
+      `;
+    } else {
+      return sql`
+        SELECT id, project_id, state, input, output_summary, agent, model, execution_path, session_id, started_at, ended_at, created_at
+        FROM tasks
+        ORDER BY created_at DESC
+        LIMIT 100
+      `;
+    }
+  });
+
+  // GET /api/tasks/:id — single task detail
+  app.get<{ Params: { id: string } }>('/api/tasks/:id', async (req, reply) => {
+    const rows = await sql`
+      SELECT id, project_id, parent_task_id, state, input, output_summary, agent, model, execution_path, worktree_path, session_id, cost_tokens, started_at, ended_at, created_at
+      FROM tasks
+      WHERE id = ${req.params.id}
+    `;
+    if (rows.length === 0) {
+      reply.code(404);
+      return { error: 'task not found' };
+    }
+    return rows[0];
+  });
+
+  // POST /api/tasks/:id/cancel — cancel a pending or running task
+  app.post<{ Params: { id: string } }>('/api/tasks/:id/cancel', async (req, reply) => {
+    const taskId = req.params.id;
+
+    // Get current task state + session info
+    const rows = await sql<{ id: string; state: string; session_id: string | null }[]>`
+      SELECT id, state, session_id FROM tasks WHERE id = ${taskId}
+    `;
+    if (rows.length === 0) {
+      reply.code(404);
+      return { error: 'task not found' };
+    }
+
+    const task = rows[0]!;
+    if (task.state !== 'pending' && task.state !== 'running' && task.state !== 'blocked') {
+      reply.code(409);
+      return { error: `cannot cancel task in state '${task.state}'` };
+    }
+
+    cancelPendingPermission(taskId);
+
+    // If running, try to cancel inference
+    if ((task.state === 'running' || task.state === 'blocked') && task.session_id) {
+      // Find active chat in the task's session
+      const chats = await sql<{ id: string }[]>`
+        SELECT id FROM chats WHERE session_id = ${task.session_id} AND status = 'open'
+      `;
+      for (const chat of chats) {
+        await inference.cancel(task.session_id, chat.id);
+      }
+    }
+
+    await sql`
+      UPDATE tasks
+      SET state = 'cancelled', ended_at = clock_timestamp()
+      WHERE id = ${taskId} AND state IN ('pending', 'running', 'blocked')
+    `;
+
+    return { cancelled: true };
+  });
+
+  // GET /api/tasks/:id/permission — pending permission prompt (if any)
+  app.get<{ Params: { id: string } }>('/api/tasks/:id/permission', async (req, reply) => {
+    const prompt = getPendingPermission(req.params.id);
+    if (!prompt) {
+      reply.code(404);
+      return { error: 'no pending permission' };
+    }
+    return prompt;
+  });
+
+  // POST /api/tasks/:id/permission — respond to a pending permission prompt
+  app.post<{ Params: { id: string } }>('/api/tasks/:id/permission', async (req, reply) => {
+    const parsed = PermissionBody.safeParse(req.body);
+    if (!parsed.success) {
+      reply.code(400);
+      return { error: 'invalid body', details: parsed.error.flatten() };
+    }
+
+    const ok = respondToPermission(req.params.id, parsed.data.option_id);
+    if (!ok) {
+      reply.code(404);
+      return { error: 'no pending permission' };
+    }
+    return { ok: true };
+  });
+
+  // GET /api/tasks/:id/commands — cached ACP slash commands (if any)
+  app.get<{ Params: { id: string } }>('/api/tasks/:id/commands', async (req, reply) => {
+    const commands = getTaskCommands(req.params.id);
+    if (!commands?.length) {
+      reply.code(404);
+      return { error: 'no commands cached' };
+    }
+    return { taskId: req.params.id, commands };
+  });
+}

apps/coder/src/routes/ws.ts

@@ -25,7 +25,7 @@ export function registerWebSocket(
 
       // Send snapshot of existing messages so client can hydrate
       const messages = await sql<Record<string, unknown>[]>`
-        SELECT id, session_id, chat_id, role, content, kind, tool_calls, tool_results, status, last_seq,
+        SELECT id, session_id, chat_id, role, content, kind, tool_calls, tool_results, reasoning_parts, status, last_seq,
                tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at, metadata,
                summary, tail_start_id, compacted_at
         FROM messages_with_parts

apps/coder/src/schema.sql

@@ -31,7 +31,7 @@ CREATE TABLE IF NOT EXISTS tasks (
   ended_at TIMESTAMPTZ,
   created_at TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp(),
   CONSTRAINT tasks_state_chk CHECK (state IN ('pending', 'running', 'completed', 'failed', 'blocked', 'cancelled')),
-  CONSTRAINT tasks_execution_path_chk CHECK (execution_path IS NULL OR execution_path IN ('native', 'acp', 'pty'))
+  CONSTRAINT tasks_execution_path_chk CHECK (execution_path IS NULL OR execution_path IN ('native', 'acp', 'pty', 'qwen'))
 );
 
 CREATE TABLE IF NOT EXISTS available_agents (
@@ -43,6 +43,31 @@ CREATE TABLE IF NOT EXISTS available_agents (
   last_probed_at TIMESTAMPTZ
 );
 
+-- v2.0.0 Phase 4: link tasks to their inference sessions.
+ALTER TABLE tasks ADD COLUMN IF NOT EXISTS session_id UUID REFERENCES sessions(id);
+
+-- v2.0.5: add 'qwen' to execution_path CHECK + arena_id column.
+ALTER TABLE tasks DROP CONSTRAINT IF EXISTS tasks_execution_path_chk;
+DO $$ BEGIN
+  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'tasks_execution_path_chk') THEN
+    ALTER TABLE tasks ADD CONSTRAINT tasks_execution_path_chk
+      CHECK (execution_path IS NULL OR execution_path IN ('native', 'acp', 'pty', 'qwen'));
+  END IF;
+END $$;
+
+-- v2.0.5: arena support — group tasks into competitive arenas.
+ALTER TABLE tasks ADD COLUMN IF NOT EXISTS arena_id UUID;
+
 -- Human inbox: tasks needing attention
 CREATE OR REPLACE VIEW human_inbox AS
   SELECT * FROM tasks WHERE state IN ('blocked', 'failed');
+
+-- v2.1.0: provider picker — extend available_agents with model discovery.
+ALTER TABLE available_agents ADD COLUMN IF NOT EXISTS models JSONB DEFAULT '[]'::jsonb;
+ALTER TABLE available_agents ADD COLUMN IF NOT EXISTS label TEXT;
+ALTER TABLE available_agents ADD COLUMN IF NOT EXISTS transport TEXT DEFAULT 'pty';
+
+-- v2.2.0: Paseo-style session config on tasks.
+ALTER TABLE tasks ADD COLUMN IF NOT EXISTS mode_id TEXT;
+ALTER TABLE tasks ADD COLUMN IF NOT EXISTS thinking_option_id TEXT;
+ALTER TABLE tasks ADD COLUMN IF NOT EXISTS feature_values JSONB;

apps/coder/src/services/__tests__/acp-derive.test.ts

@@ -0,0 +1,154 @@
+import { describe, it, expect } from 'vitest';
+import type { SessionConfigOption } from '@agentclientprotocol/sdk';
+import {
+  deriveModesFromACP,
+  deriveModelDefinitionsFromACP,
+  findThoughtLevelConfigId,
+} from '../acp-derive.js';
+
+describe('deriveModesFromACP', () => {
+  it('prefers modeState.availableModes when present', () => {
+    const { modes, currentModeId } = deriveModesFromACP(
+      [{ id: 'fallback', label: 'Fallback' }],
+      {
+        currentModeId: 'plan',
+        availableModes: [
+          { id: 'plan', name: 'Plan', description: 'Read-only planning' },
+          { id: 'code', name: 'Code' },
+        ],
+      },
+    );
+
+    expect(modes).toEqual([
+      { id: 'plan', label: 'Plan', description: 'Read-only planning' },
+      { id: 'code', label: 'Code', description: undefined },
+    ]);
+    expect(currentModeId).toBe('plan');
+  });
+
+  it('falls back to configOptions mode select', () => {
+    const configOptions: SessionConfigOption[] = [
+      {
+        type: 'select',
+        id: 'mode',
+        category: 'mode',
+        currentValue: 'auto',
+        options: [
+          { value: 'auto', name: 'Auto' },
+          { value: 'manual', name: 'Manual', description: 'Ask first' },
+        ],
+      },
+    ];
+
+    const { modes, currentModeId } = deriveModesFromACP([], null, configOptions);
+
+    expect(modes).toEqual([
+      { id: 'auto', label: 'Auto', description: undefined },
+      { id: 'manual', label: 'Manual', description: 'Ask first' },
+    ]);
+    expect(currentModeId).toBe('auto');
+  });
+
+  it('uses static fallback when no ACP mode data', () => {
+    const fallback = [{ id: 'default', label: 'Default' }];
+    const { modes, currentModeId } = deriveModesFromACP(fallback, null, null);
+
+    expect(modes).toEqual(fallback);
+    expect(currentModeId).toBeNull();
+  });
+});
+
+describe('deriveModelDefinitionsFromACP', () => {
+  it('maps availableModels with thought_level options', () => {
+    const configOptions: SessionConfigOption[] = [
+      {
+        type: 'select',
+        id: 'thought',
+        category: 'thought_level',
+        currentValue: 'medium',
+        options: [
+          { value: 'low', name: 'Low' },
+          { value: 'medium', name: 'Medium' },
+        ],
+      },
+    ];
+
+    const models = deriveModelDefinitionsFromACP(
+      {
+        currentModelId: 'gpt-4',
+        availableModels: [
+          { modelId: 'gpt-4', name: 'GPT-4' },
+          { modelId: 'gpt-4-mini', name: 'Mini', description: 'Cheaper' },
+        ],
+      },
+      configOptions,
+    );
+
+    expect(models).toEqual([
+      {
+        id: 'gpt-4',
+        label: 'GPT-4',
+        description: undefined,
+        isDefault: true,
+        thinkingOptions: [
+          { id: 'low', label: 'Low', isDefault: false },
+          { id: 'medium', label: 'Medium', isDefault: true },
+        ],
+        defaultThinkingOptionId: 'medium',
+      },
+      {
+        id: 'gpt-4-mini',
+        label: 'Mini',
+        description: 'Cheaper',
+        isDefault: false,
+        thinkingOptions: [
+          { id: 'low', label: 'Low', isDefault: false },
+          { id: 'medium', label: 'Medium', isDefault: true },
+        ],
+        defaultThinkingOptionId: 'medium',
+      },
+    ]);
+  });
+
+  it('falls back to model select config when no availableModels', () => {
+    const configOptions: SessionConfigOption[] = [
+      {
+        type: 'select',
+        id: 'model',
+        category: 'model',
+        currentValue: 'sonnet',
+        options: [
+          { value: 'sonnet', name: 'Sonnet' },
+          { value: 'opus', name: 'Opus' },
+        ],
+      },
+    ];
+
+    const models = deriveModelDefinitionsFromACP(null, configOptions);
+
+    expect(models).toEqual([
+      { id: 'sonnet', label: 'Sonnet', isDefault: true, defaultThinkingOptionId: undefined },
+      { id: 'opus', label: 'Opus', isDefault: false, defaultThinkingOptionId: undefined },
+    ]);
+  });
+});
+
+describe('findThoughtLevelConfigId', () => {
+  it('returns thought_level select id', () => {
+    const configOptions: SessionConfigOption[] = [
+      {
+        type: 'select',
+        id: 'effort',
+        category: 'thought_level',
+        currentValue: 'high',
+        options: [{ value: 'high', name: 'High' }],
+      },
+    ];
+
+    expect(findThoughtLevelConfigId(configOptions)).toBe('effort');
+  });
+
+  it('returns null when missing', () => {
+    expect(findThoughtLevelConfigId(null)).toBeNull();
+  });
+});

apps/coder/src/services/__tests__/acp-tool-snapshot.test.ts

@@ -0,0 +1,66 @@
+import { describe, it, expect } from 'vitest';
+import {
+  mergeToolSnapshot,
+  mapToolLifecycleStatus,
+  snapshotToWireToolCall,
+  synthesizeCanceledSnapshots,
+} from '../acp-tool-snapshot.js';
+
+describe('mergeToolSnapshot', () => {
+  it('preserves stable toolCallId across updates', () => {
+    const first = mergeToolSnapshot('tc-1', {
+      toolCallId: 'tc-1',
+      title: 'Read file',
+      kind: 'read',
+      status: 'in_progress',
+      rawInput: { path: 'foo.ts' },
+    });
+    const merged = mergeToolSnapshot(
+      'tc-1',
+      {
+        toolCallId: 'tc-1',
+        title: 'Read file',
+        status: 'completed',
+        rawOutput: { content: 'hello' },
+      },
+      first,
+    );
+    expect(merged.toolCallId).toBe('tc-1');
+    expect(merged.rawInput).toEqual({ path: 'foo.ts' });
+    expect(merged.status).toBe('completed');
+    expect(merged.rawOutput).toEqual({ content: 'hello' });
+  });
+});
+
+describe('snapshotToWireToolCall', () => {
+  it('embeds ACP lifecycle meta for UI merge', () => {
+    const wire = snapshotToWireToolCall({
+      toolCallId: 'tc-42',
+      title: 'Edit',
+      kind: 'edit',
+      status: 'completed',
+      rawInput: { path: 'a.ts' },
+      rawOutput: 'ok',
+    });
+    expect(wire.id).toBe('tc-42');
+    expect(wire.name).toBe('edit');
+    expect(wire.args._acp).toMatchObject({ status: 'completed', title: 'Edit', output: 'ok' });
+  });
+
+  it('maps synthesized cancel to canceled lifecycle', () => {
+    const [canceled] = synthesizeCanceledSnapshots([
+      { toolCallId: 'tc-1', title: 'Run', status: 'in_progress' },
+    ]);
+    const wire = snapshotToWireToolCall(canceled!);
+    expect(wire.args._acp).toMatchObject({ status: 'canceled' });
+  });
+});
+
+describe('mapToolLifecycleStatus', () => {
+  it('maps ACP statuses to UI lifecycle', () => {
+    expect(mapToolLifecycleStatus('completed')).toBe('completed');
+    expect(mapToolLifecycleStatus('failed')).toBe('failed');
+    expect(mapToolLifecycleStatus('in_progress')).toBe('running');
+    expect(mapToolLifecycleStatus(undefined, 'canceled')).toBe('canceled');
+  });
+});

apps/coder/src/services/__tests__/cursor-models.test.ts

@@ -0,0 +1,47 @@
+import { describe, it, expect } from 'vitest';
+import { parseCursorAgentModelsOutput } from '../cursor-models.js';
+
+describe('parseCursorAgentModelsOutput', () => {
+  it('parses cursor-agent models output with default marker', () => {
+    const output = `
+Available models
+claude-4-sonnet - Claude 4 Sonnet (default)
+gpt-4.1 - GPT-4.1
+Tip: use cursor-agent models for full list
+`.trim();
+
+    const models = parseCursorAgentModelsOutput(output);
+
+    expect(models).toEqual([
+      { id: 'claude-4-sonnet', label: 'Claude 4 Sonnet', isDefault: true },
+      { id: 'gpt-4.1', label: 'GPT-4.1', isDefault: false },
+    ]);
+  });
+
+  it('uses current marker when no default', () => {
+    const output = `
+model-a - Model A (current)
+model-b - Model B
+`.trim();
+
+    const models = parseCursorAgentModelsOutput(output);
+
+    expect(models.find((m) => m.id === 'model-a')?.isDefault).toBe(true);
+    expect(models.find((m) => m.id === 'model-b')?.isDefault).toBe(false);
+  });
+
+  it('defaults to first model when no markers', () => {
+    const output = 'alpha - Alpha\nbeta - Beta';
+    const models = parseCursorAgentModelsOutput(output);
+
+    expect(models[0]?.isDefault).toBe(true);
+    expect(models[1]?.isDefault).toBe(false);
+  });
+
+  it('skips malformed lines', () => {
+    const output = 'no-separator\nvalid - Valid';
+    const models = parseCursorAgentModelsOutput(output);
+
+    expect(models).toEqual([{ id: 'valid', label: 'Valid', isDefault: true }]);
+  });
+});

apps/coder/src/services/__tests__/pending_changes_integration.test.ts

@@ -0,0 +1,96 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { readFileSync, existsSync } from 'node:fs';
+import { readFile, rm, mkdir } from 'node:fs/promises';
+import { resolve } from 'node:path';
+import postgres from 'postgres';
+import { queueCreate, queueEdit, queueDelete, applyOne, rewindOne, listPending } from '../pending_changes.js';
+
+/**
+ * Integration test for the full pending-changes lifecycle.
+ * Requires DATABASE_URL env var pointing to a running postgres instance.
+ * Skips cleanly when DATABASE_URL is not set.
+ *
+ * Run with:
+ *   DATABASE_URL='postgres://boocode:devpass@localhost:5500/boocode' pnpm -C apps/coder test
+ */
+describe.runIf(!!process.env.DATABASE_URL)('pending_changes integration', () => {
+  let sql: ReturnType<typeof postgres>;
+  const testDir = '/tmp/boocode-pending-changes-test-' + Date.now();
+  const projectRoot = testDir;
+  const testSessionId = '00000000-0000-0000-0000-000000000001';
+
+  beforeAll(async () => {
+    sql = postgres(process.env.DATABASE_URL!, { max: 3 });
+
+    // Apply schema
+    const schemaPath = resolve(__dirname, '../../schema.sql');
+    const ddl = readFileSync(schemaPath, 'utf8');
+    await sql.unsafe(ddl);
+
+    // Create temp project directory
+    await mkdir(testDir, { recursive: true });
+  });
+
+  afterAll(async () => {
+    // Cleanup test data
+    await sql`DELETE FROM pending_changes WHERE session_id = ${testSessionId}`;
+    await sql.end({ timeout: 5 });
+    // Remove temp directory
+    await rm(testDir, { recursive: true, force: true });
+  });
+
+  it('queueCreate → listPending → applyOne → verify file exists', async () => {
+    const change = await queueCreate(sql, testSessionId, null, 'hello.txt', 'hello world', projectRoot);
+    expect(change.status).toBe('pending');
+    expect(change.operation).toBe('create');
+
+    const pending = await listPending(sql, testSessionId);
+    expect(pending.some((p) => p.id === change.id)).toBe(true);
+
+    const result = await applyOne(sql, change.id, projectRoot);
+    expect(result.success).toBe(true);
+
+    const content = await readFile(resolve(testDir, 'hello.txt'), 'utf8');
+    expect(content).toBe('hello world');
+  });
+
+  it('queueEdit → apply → verify content changed', async () => {
+    // Setup: create a file first
+    const createChange = await queueCreate(sql, testSessionId, null, 'editable.txt', 'original content here', projectRoot);
+    await applyOne(sql, createChange.id, projectRoot);
+
+    // Queue an edit
+    const editChange = await queueEdit(sql, testSessionId, null, 'editable.txt', 'original', 'modified', projectRoot);
+    expect(editChange.operation).toBe('edit');
+
+    const result = await applyOne(sql, editChange.id, projectRoot);
+    expect(result.success).toBe(true);
+
+    const content = await readFile(resolve(testDir, 'editable.txt'), 'utf8');
+    expect(content).toBe('modified content here');
+  });
+
+  it('queueDelete → apply → verify file gone', async () => {
+    // Setup: create a file
+    const createChange = await queueCreate(sql, testSessionId, null, 'deleteme.txt', 'goodbye', projectRoot);
+    await applyOne(sql, createChange.id, projectRoot);
+    expect(existsSync(resolve(testDir, 'deleteme.txt'))).toBe(true);
+
+    // Queue a delete
+    const deleteChange = await queueDelete(sql, testSessionId, null, 'deleteme.txt', projectRoot);
+    const result = await applyOne(sql, deleteChange.id, projectRoot);
+    expect(result.success).toBe(true);
+    expect(existsSync(resolve(testDir, 'deleteme.txt'))).toBe(false);
+  });
+
+  it('rewindOne → verify reverted', async () => {
+    // Setup: create and apply a file
+    const createChange = await queueCreate(sql, testSessionId, null, 'rewindable.txt', 'initial', projectRoot);
+    await applyOne(sql, createChange.id, projectRoot);
+
+    // Rewind the create (should delete the file)
+    const result = await rewindOne(sql, createChange.id, projectRoot);
+    expect(result.success).toBe(true);
+    expect(existsSync(resolve(testDir, 'rewindable.txt'))).toBe(false);
+  });
+});

apps/coder/src/services/__tests__/provider-commands.test.ts

@@ -0,0 +1,26 @@
+import { describe, it, expect } from 'vitest';
+import { getManifestCommands, mergeCommands, PROVIDER_COMMANDS } from '../provider-commands.js';
+
+describe('provider-commands', () => {
+  it('defines commands for every external harness', () => {
+    for (const name of ['claude', 'opencode', 'cursor', 'goose', 'qwen', 'copilot']) {
+      expect(getManifestCommands(name).length, name).toBeGreaterThan(0);
+    }
+  });
+
+  it('boocode uses frontend skills — empty manifest', () => {
+    expect(getManifestCommands('boocode')).toEqual([]);
+    expect(PROVIDER_COMMANDS.boocode).toEqual([]);
+  });
+
+  it('mergeCommands dedupes by name with later override', () => {
+    const merged = mergeCommands(
+      [{ name: 'help', description: 'a' }],
+      [{ name: 'help', description: 'b' }, { name: 'clear' }],
+    );
+    expect(merged).toEqual([
+      { name: 'clear' },
+      { name: 'help', description: 'b' },
+    ]);
+  });
+});

apps/coder/src/services/__tests__/provider-snapshot.test.ts

@@ -0,0 +1,168 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import {
+  mergeModels,
+  prefixLlamaSwapModels,
+  clearProviderSnapshotCache,
+  getProviderSnapshot,
+} from '../provider-snapshot.js';
+
+vi.mock('../acp-probe.js', () => ({
+  probeAcpProvider: vi.fn(),
+}));
+
+import { probeAcpProvider } from '../acp-probe.js';
+
+const mockProbe = vi.mocked(probeAcpProvider);
+
+function mockSql(agents: Array<{
+  name: string;
+  install_path: string | null;
+  supports_acp: boolean;
+  models: Array<{ id: string; label: string }> | null;
+  label: string | null;
+  transport: string | null;
+}>) {
+  return vi.fn((strings: TemplateStringsArray) => {
+    const query = strings.join('');
+    if (query.includes('FROM available_agents')) {
+      return Promise.resolve(agents);
+    }
+    if (query.includes('UPDATE available_agents')) {
+      return Promise.resolve([]);
+    }
+    return Promise.resolve([]);
+  }) as unknown as import('../db.js').Sql;
+}
+
+const config = {
+  LLAMA_SWAP_URL: 'http://llama-swap.test',
+} as import('../config.js').Config;
+
+describe('prefixLlamaSwapModels', () => {
+  it('prefixes bare ids', () => {
+    expect(prefixLlamaSwapModels([{ id: 'qwen3', label: 'qwen3' }])).toEqual([
+      { id: 'llama-swap/qwen3', label: 'qwen3' },
+    ]);
+  });
+
+  it('leaves already-prefixed ids unchanged', () => {
+    expect(prefixLlamaSwapModels([{ id: 'llama-swap/qwen3', label: 'qwen3' }])).toEqual([
+      { id: 'llama-swap/qwen3', label: 'qwen3' },
+    ]);
+  });
+});
+
+describe('mergeModels', () => {
+  it('dedupes by id preserving first occurrence', () => {
+    const merged = mergeModels(
+      [{ id: 'a', label: 'A' }],
+      [{ id: 'a', label: 'A2' }, { id: 'b', label: 'B' }],
+    );
+    expect(merged).toEqual([
+      { id: 'a', label: 'A' },
+      { id: 'b', label: 'B' },
+    ]);
+  });
+});
+
+describe('getProviderSnapshot', () => {
+  beforeEach(() => {
+    clearProviderSnapshotCache();
+    vi.restoreAllMocks();
+    vi.stubGlobal(
+      'fetch',
+      vi.fn().mockResolvedValue({
+        ok: true,
+        json: async () => ({
+          data: [{ id: 'local-model' }, { id: 'llama-swap/existing' }],
+        }),
+      }),
+    );
+  });
+
+  it('merges opencode ACP models with prefixed llama-swap models', async () => {
+    mockProbe.mockResolvedValue({
+      ok: true,
+      models: [{ id: 'opencode/big-pickle', label: 'Big Pickle', isDefault: true }],
+      modes: [{ id: 'build', label: 'Build' }],
+      defaultModeId: 'build',
+      commands: [{ name: 'custom', description: 'From ACP probe' }],
+    });
+
+    const sql = mockSql([
+      {
+        name: 'opencode',
+        install_path: '/usr/bin/opencode',
+        supports_acp: true,
+        models: null,
+        label: 'OpenCode',
+        transport: 'acp',
+      },
+    ]);
+
+    const entries = await getProviderSnapshot(sql, config, '/tmp/project', true);
+    const opencode = entries.find((e) => e.name === 'opencode');
+
+    expect(opencode?.models.map((m) => m.id)).toEqual([
+      'opencode/big-pickle',
+      'llama-swap/local-model',
+      'llama-swap/existing',
+    ]);
+    expect(opencode?.commands.some((c) => c.name === 'help')).toBe(true);
+    expect(opencode?.commands.some((c) => c.name === 'custom')).toBe(true);
+  });
+
+  it('combines qwen-shaped probe and settings model lists via mergeModels', () => {
+    const merged = mergeModels(
+      [{ id: 'qwen-probed', label: 'Qwen Probed' }],
+      [{ id: 'from-settings', label: 'from-settings' }],
+    );
+    expect(merged.map((m) => m.id)).toEqual(['qwen-probed', 'from-settings']);
+  });
+
+  it('returns cached entries on second call within TTL', async () => {
+    mockProbe.mockResolvedValue({
+      ok: true,
+      models: [{ id: 'm1', label: 'M1' }],
+      modes: [],
+      defaultModeId: null,
+      commands: [],
+    });
+
+    const sql = mockSql([
+      {
+        name: 'goose',
+        install_path: '/usr/bin/goose',
+        supports_acp: true,
+        models: null,
+        label: 'Goose',
+        transport: 'acp',
+      },
+    ]);
+
+    await getProviderSnapshot(sql, config, '/tmp/cwd', true);
+    await getProviderSnapshot(sql, config, '/tmp/cwd', false);
+
+    expect(mockProbe).toHaveBeenCalledTimes(1);
+  });
+
+  it('attaches claude thinking options', async () => {
+    const sql = mockSql([
+      {
+        name: 'claude',
+        install_path: '/usr/bin/claude',
+        supports_acp: false,
+        models: [{ id: 'claude-sonnet', label: 'Sonnet' }],
+        label: 'Claude Code',
+        transport: 'pty',
+      },
+    ]);
+
+    const entries = await getProviderSnapshot(sql, config, '/tmp/project', true);
+    const claude = entries.find((e) => e.name === 'claude');
+
+    expect(claude?.models[0]?.thinkingOptions?.length).toBeGreaterThan(0);
+    expect(claude?.modes.length).toBeGreaterThan(0);
+    expect(claude?.commands.some((c) => c.name === 'help')).toBe(true);
+  });
+});

apps/coder/src/services/__tests__/write_guard_fuzz.test.ts

@@ -0,0 +1,193 @@
+import { describe, it, expect } from 'vitest';
+import { resolveWritePath } from '../write_guard.js';
+
+const projectRoot = '/opt/testproject';
+
+describe('write_guard fuzz — traversal attacks', () => {
+  // Basic traversal
+  it('rejects ../', () => {
+    expect(() => resolveWritePath(projectRoot, '../etc/passwd')).toThrow();
+  });
+
+  it('rejects ../../', () => {
+    expect(() => resolveWritePath(projectRoot, '../../etc/passwd')).toThrow();
+  });
+
+  it('rejects deeply nested ../../../', () => {
+    expect(() => resolveWritePath(projectRoot, '../../../../../../../etc/shadow')).toThrow();
+  });
+
+  // Encoded traversal — resolve() doesn't decode percent-encoding, so these
+  // stay as literal filenames. The guard must still not let them escape.
+  it('rejects %2e%2e/ (literal percent-encoded dots)', () => {
+    // resolve('/opt/testproject', '%2e%2e/etc/passwd') stays inside root
+    // because Node's resolve treats the literal characters, not decoded.
+    // The file would be /opt/testproject/%2e%2e/etc/passwd which IS inside root.
+    // This test confirms it doesn't throw (it resolves inside) — defense in depth
+    // is that the filesystem won't have this path, but no traversal occurs.
+    const result = resolveWritePath(projectRoot, '%2e%2e/etc/passwd');
+    expect(result).toContain(projectRoot);
+  });
+
+  it('rejects ..%2f (literal percent-encoded slash)', () => {
+    // '../%2fetc/passwd' — the ../ IS real traversal
+    expect(() => resolveWritePath(projectRoot, '../%2fetc/passwd')).toThrow();
+  });
+
+  // Null byte injection
+  it('rejects null bytes', () => {
+    expect(() => resolveWritePath(projectRoot, 'file.txt\x00.jpg')).toThrow();
+  });
+
+  // Absolute path escape
+  it('rejects /etc/passwd', () => {
+    expect(() => resolveWritePath(projectRoot, '/etc/passwd')).toThrow();
+  });
+
+  it('rejects /opt/other-project/file', () => {
+    expect(() => resolveWritePath(projectRoot, '/opt/other-project/file.ts')).toThrow();
+  });
+
+  // Path that starts with project root as prefix but isn't under it
+  it('rejects prefix match without separator', () => {
+    expect(() => resolveWritePath(projectRoot, '/opt/testproject-evil/file.ts')).toThrow();
+  });
+
+  // Double slashes / traversal after valid prefix
+  it('rejects /opt/testproject/../etc/passwd via double-dot after valid prefix', () => {
+    expect(() => resolveWritePath(projectRoot, '/opt/testproject/../etc/passwd')).toThrow();
+  });
+
+  // Windows-style (defense-in-depth on Linux)
+  it('rejects backslash traversal', () => {
+    // On POSIX, backslash is a valid filename char, so '..\\etc\\passwd' resolves
+    // as a single segment inside projectRoot. Not a traversal, but test that it
+    // doesn't crash and stays within root.
+    const result = resolveWritePath(projectRoot, '..\\etc\\passwd');
+    // Node resolve on POSIX treats this as a literal filename segment containing backslashes
+    // that starts with '..' — resolve normalizes: /opt/testproject/..\\etc\\passwd
+    // Wait: resolve('/opt/testproject', '..\\etc\\passwd') — on POSIX backslash
+    // is NOT a separator, so this is a file named '..\\etc\\passwd' inside projectRoot.
+    // Actually no — resolve splits on '/' only on POSIX. '..' at start triggers parent.
+    // Let's check: the string starts with '..' but the next char is '\\' not '/'.
+    // Node's path.resolve on POSIX: the string '..\\etc\\passwd' does NOT contain '/'
+    // so it IS treated as a single path component? No — resolve still splits on '/'.
+    // '..\\etc\\passwd' has no '/', so resolve('/opt/testproject', '..\\etc\\passwd')
+    // = resolve('/opt/testproject/..\\etc\\passwd') — but wait, resolve processes
+    // segments separated by '/'. With no '/', the whole thing is one segment.
+    // Actually wrong: path.resolve calls normalizeString which handles '.' and '..'
+    // only when they are full segments delimited by '/'. Since there's no '/' in
+    // '..\\etc\\passwd', it treats the entire string as one filename.
+    // So: /opt/testproject/..\\etc\\passwd — inside root. No throw.
+    expect(result).toContain(projectRoot);
+  });
+
+  // Secret files (deny list)
+  it('rejects .env', () => {
+    expect(() => resolveWritePath(projectRoot, '.env')).toThrow();
+  });
+
+  it('rejects nested .env', () => {
+    expect(() => resolveWritePath(projectRoot, 'config/.env')).toThrow();
+  });
+
+  it('rejects .env.local', () => {
+    expect(() => resolveWritePath(projectRoot, '.env.local')).toThrow();
+  });
+
+  it('rejects id_rsa', () => {
+    expect(() => resolveWritePath(projectRoot, '.ssh/id_rsa')).toThrow();
+  });
+
+  it('rejects id_ed25519', () => {
+    expect(() => resolveWritePath(projectRoot, '.ssh/id_ed25519')).toThrow();
+  });
+
+  it('rejects *.pem', () => {
+    expect(() => resolveWritePath(projectRoot, 'certs/server.pem')).toThrow();
+  });
+
+  it('rejects *.key', () => {
+    expect(() => resolveWritePath(projectRoot, 'certs/private.key')).toThrow();
+  });
+
+  it('rejects credentials.json', () => {
+    expect(() => resolveWritePath(projectRoot, 'credentials.json')).toThrow();
+  });
+
+  it('rejects *.p12', () => {
+    expect(() => resolveWritePath(projectRoot, 'certs/client.p12')).toThrow();
+  });
+
+  it('rejects .netrc', () => {
+    expect(() => resolveWritePath(projectRoot, '.netrc')).toThrow();
+  });
+
+  it('rejects *.kdbx', () => {
+    expect(() => resolveWritePath(projectRoot, 'secrets/passwords.kdbx')).toThrow();
+  });
+
+  // Valid paths (should NOT throw)
+  it('allows simple relative path', () => {
+    expect(resolveWritePath(projectRoot, 'src/index.ts')).toBe('/opt/testproject/src/index.ts');
+  });
+
+  it('allows nested path', () => {
+    expect(resolveWritePath(projectRoot, 'src/services/tools/edit_file.ts')).toContain(projectRoot);
+  });
+
+  it('allows dotfile that is not in deny list', () => {
+    expect(resolveWritePath(projectRoot, '.gitignore')).toContain(projectRoot);
+  });
+
+  it('allows absolute path inside project', () => {
+    expect(resolveWritePath(projectRoot, '/opt/testproject/new-file.ts')).toBe('/opt/testproject/new-file.ts');
+  });
+
+  it('allows path with safe internal ../', () => {
+    expect(resolveWritePath(projectRoot, 'src/../lib/utils.ts')).toBe('/opt/testproject/lib/utils.ts');
+  });
+});
+
+describe('write_guard fuzz — edge cases', () => {
+  it('throws on empty string', () => {
+    expect(() => resolveWritePath(projectRoot, '')).toThrow();
+  });
+
+  it('throws on whitespace-only', () => {
+    expect(() => resolveWritePath(projectRoot, '   ')).toThrow();
+  });
+
+  it('throws when path IS the project root itself', () => {
+    // Writing to the directory itself makes no sense for a file write
+    expect(() => resolveWritePath(projectRoot, '/opt/testproject')).not.toThrow();
+    // The guard allows it (resolve === projectRoot passes the check).
+    // This is acceptable because the filesystem write will fail on a directory.
+    // If we want to block this, that's a separate concern.
+  });
+
+  it('handles very long path without crashing', () => {
+    const longSegment = 'a'.repeat(255);
+    const longPath = Array(20).fill(longSegment).join('/');
+    // Should not crash — may throw or succeed, but must not buffer-overflow
+    expect(() => resolveWritePath(projectRoot, longPath)).not.toThrow();
+  });
+
+  it('handles path with only dots', () => {
+    // Single dot resolves to projectRoot itself
+    const result = resolveWritePath(projectRoot, './src/file.ts');
+    expect(result).toBe('/opt/testproject/src/file.ts');
+  });
+
+  it('rejects triple-dot trick (... is not special but ../ within is)', () => {
+    // '.../etc' is a literal directory name, not traversal
+    const result = resolveWritePath(projectRoot, '.../etc');
+    expect(result).toContain(projectRoot);
+  });
+
+  it('rejects path with multiple consecutive slashes', () => {
+    // resolve normalizes these; should still be inside root
+    const result = resolveWritePath(projectRoot, 'src///file.ts');
+    expect(result).toBe('/opt/testproject/src/file.ts');
+  });
+});

apps/coder/src/services/acp-client-fs.ts

@@ -0,0 +1,35 @@
+import { promises as fs } from 'node:fs';
+import { dirname, isAbsolute, join, resolve } from 'node:path';
+
+/** Resolve an ACP path against the agent worktree and read a slice of lines. */
+export async function readWorktreeTextFile(
+  worktreePath: string,
+  filePath: string,
+  line?: number | null,
+  limit?: number | null,
+): Promise<string> {
+  const absolute = isAbsolute(filePath) ? filePath : resolve(worktreePath, filePath);
+  if (!absolute.startsWith(resolve(worktreePath))) {
+    throw new Error(`path escapes worktree: ${filePath}`);
+  }
+  const raw = await fs.readFile(absolute, 'utf8');
+  if (!line && !limit) return raw;
+  const lines = raw.split(/\r?\n/);
+  const start = Math.max((line ?? 1) - 1, 0);
+  const end = limit ? start + limit : undefined;
+  return lines.slice(start, end).join('\n');
+}
+
+/** Write a file inside the worktree (creates parent dirs). */
+export async function writeWorktreeTextFile(
+  worktreePath: string,
+  filePath: string,
+  content: string,
+): Promise<void> {
+  const absolute = isAbsolute(filePath) ? filePath : resolve(worktreePath, filePath);
+  if (!absolute.startsWith(resolve(worktreePath))) {
+    throw new Error(`path escapes worktree: ${filePath}`);
+  }
+  await fs.mkdir(dirname(absolute), { recursive: true });
+  await fs.writeFile(absolute, content, 'utf8');
+}

apps/coder/src/services/acp-derive.ts

@@ -0,0 +1,128 @@
+/**
+ * ACP model/mode derivation — adapted from Paseo acp-agent.ts.
+ */
+import type {
+  SessionConfigOption,
+  SessionModelState,
+  SessionModeState,
+} from '@agentclientprotocol/sdk';
+import type { ProviderMode, ProviderModel, ThinkingOption } from './provider-types.js';
+
+type SelectConfigOption = Extract<SessionConfigOption, { type: 'select' }>;
+
+interface SelectConfigChoice {
+  value: string;
+  name: string;
+  description?: string | null;
+  group?: string;
+}
+
+function findSelectConfigOption({
+  configOptions,
+  category,
+  id,
+}: {
+  configOptions: SessionConfigOption[] | null | undefined;
+  category: string;
+  id?: string;
+}): SelectConfigOption | null {
+  const option = configOptions?.find(
+    (entry): entry is SelectConfigOption =>
+      entry.type === 'select' && entry.category === category && (!id || entry.id === id),
+  );
+  return option ?? null;
+}
+
+function flattenSelectOptions(options: SelectConfigOption['options']): SelectConfigChoice[] {
+  const flattened: SelectConfigChoice[] = [];
+  for (const option of options) {
+    if ('value' in option) {
+      flattened.push(option);
+      continue;
+    }
+    for (const groupOption of option.options) {
+      flattened.push({ ...groupOption, group: option.group });
+    }
+  }
+  return flattened;
+}
+
+function deriveSelectorOptions(
+  configOptions: SessionConfigOption[] | null | undefined,
+  category: string,
+): ThinkingOption[] {
+  const option = findSelectConfigOption({ configOptions, category });
+  if (!option) return [];
+
+  return flattenSelectOptions(option.options).map((value) => ({
+    id: value.value,
+    label: value.name,
+    isDefault: value.value === option.currentValue,
+  }));
+}
+
+export function deriveModesFromACP(
+  fallbackModes: ProviderMode[],
+  modeState?: SessionModeState | null,
+  configOptions?: SessionConfigOption[] | null,
+): { modes: ProviderMode[]; currentModeId: string | null } {
+  if (modeState?.availableModes?.length) {
+    return {
+      modes: modeState.availableModes.map((mode) => ({
+        id: mode.id,
+        label: mode.name,
+        description: mode.description ?? undefined,
+      })),
+      currentModeId: modeState.currentModeId ?? null,
+    };
+  }
+
+  const modeOption = findSelectConfigOption({ configOptions, category: 'mode' });
+  if (modeOption) {
+    const flatOptions = flattenSelectOptions(modeOption.options);
+    return {
+      modes: flatOptions.map((option) => ({
+        id: option.value,
+        label: option.name,
+        description: option.description ?? undefined,
+      })),
+      currentModeId: modeOption.currentValue,
+    };
+  }
+
+  return { modes: fallbackModes, currentModeId: null };
+}
+
+export function deriveModelDefinitionsFromACP(
+  models: SessionModelState | null | undefined,
+  configOptions?: SessionConfigOption[] | null,
+): ProviderModel[] {
+  const thinkingOptions = deriveSelectorOptions(configOptions, 'thought_level');
+  const defaultThinkingOptionId = thinkingOptions.find((o) => o.isDefault)?.id;
+
+  if (models?.availableModels?.length) {
+    return models.availableModels.map((model) => ({
+      id: model.modelId,
+      label: model.name,
+      description: model.description ?? undefined,
+      isDefault: model.modelId === models.currentModelId,
+      thinkingOptions: thinkingOptions.length > 0 ? thinkingOptions : undefined,
+      defaultThinkingOptionId: defaultThinkingOptionId ?? undefined,
+    }));
+  }
+
+  const modelOptions = deriveSelectorOptions(configOptions, 'model');
+  return modelOptions.map((option) => ({
+    id: option.id,
+    label: option.label,
+    isDefault: option.isDefault,
+    thinkingOptions: thinkingOptions.length > 0 ? thinkingOptions : undefined,
+    defaultThinkingOptionId: defaultThinkingOptionId ?? undefined,
+  }));
+}
+
+export function findThoughtLevelConfigId(
+  configOptions: SessionConfigOption[] | null | undefined,
+): string | null {
+  return findSelectConfigOption({ configOptions, category: 'thought_level' })?.id ?? null;
+}

apps/coder/src/services/acp-dispatch.ts

@@ -0,0 +1,382 @@
+/**
+ * ACP dispatch — runs ACP-capable agents directly on the host.
+ *
+ * v2.3: Paseo-aligned tool lifecycle — stable toolCallId, merge on
+ * tool_call_update, reasoning stream, worktree FS client, persist-ready snapshots.
+ */
+import type { FastifyBaseLogger } from 'fastify';
+import {
+  ClientSideConnection,
+  type Client,
+  type SessionNotification,
+  type RequestPermissionRequest,
+  type RequestPermissionResponse,
+  type ReadTextFileRequest,
+  type ReadTextFileResponse,
+  type WriteTextFileRequest,
+  type WriteTextFileResponse,
+  type CreateTerminalRequest,
+  type CreateTerminalResponse,
+  type SessionConfigOption,
+  type ClientSideConnection as ConnectionType,
+} from '@agentclientprotocol/sdk';
+import type { Broker } from '@boocode/server/broker';
+import type { WsFrame } from '@boocode/server/ws-frames';
+import { spawn } from 'node:child_process';
+import { findThoughtLevelConfigId } from './acp-derive.js';
+import { resolveAcpSpawnArgs } from './acp-spawn.js';
+import { createAcpNdJsonStream } from './acp-stream.js';
+import { waitForPermissionResponse, cancelPendingPermission } from './permission-waiter.js';
+import { mergeTaskCommands, getTaskCommands } from './agent-commands-cache.js';
+import { readWorktreeTextFile, writeWorktreeTextFile } from './acp-client-fs.js';
+import {
+  type AcpToolSnapshot,
+  mergeToolSnapshot,
+  snapshotToWireToolCall,
+  synthesizeCanceledSnapshots,
+} from './acp-tool-snapshot.js';
+
+export interface AcpDispatchResult {
+  exitCode: number;
+  output: string;
+  toolSnapshots: AcpToolSnapshot[];
+  reasoningText: string;
+  stopReason: string;
+}
+
+export interface AcpDispatchOpts {
+  agent: string;
+  task: string;
+  worktreePath: string;
+  model?: string;
+  modeId?: string;
+  thinkingOptionId?: string;
+  taskId?: string;
+  sessionId?: string;
+  chatId?: string;
+  messageId?: string;
+  broker?: Broker;
+  installPath?: string;
+  signal?: AbortSignal;
+  log: FastifyBaseLogger;
+}
+
+async function applySessionOverrides(
+  connection: ConnectionType,
+  acpSessionId: string,
+  configOptions: SessionConfigOption[] | null | undefined,
+  opts: Pick<AcpDispatchOpts, 'model' | 'modeId' | 'thinkingOptionId' | 'log'>,
+): Promise<void> {
+  const { model, modeId, thinkingOptionId, log } = opts;
+
+  if (modeId) {
+    try {
+      await connection.setSessionMode({ sessionId: acpSessionId, modeId });
+    } catch (err) {
+      log.warn({ modeId, err: err instanceof Error ? err.message : String(err) }, 'acp-dispatch: setSessionMode failed');
+    }
+  }
+
+  if (model) {
+    try {
+      await connection.unstable_setSessionModel({ sessionId: acpSessionId, modelId: model });
+    } catch (err) {
+      log.warn({ model, err: err instanceof Error ? err.message : String(err) }, 'acp-dispatch: setSessionModel failed');
+    }
+  }
+
+  if (thinkingOptionId) {
+    const configId = findThoughtLevelConfigId(configOptions);
+    if (configId) {
+      try {
+        await connection.setSessionConfigOption({
+          sessionId: acpSessionId,
+          configId,
+          value: thinkingOptionId,
+        });
+      } catch (err) {
+        log.warn(
+          { thinkingOptionId, err: err instanceof Error ? err.message : String(err) },
+          'acp-dispatch: setSessionConfigOption failed',
+        );
+      }
+    }
+  }
+}
+
+class AcpStreamContext {
+  readonly textChunks: string[] = [];
+  readonly reasoningChunks: string[] = [];
+  readonly toolSnapshots = new Map<string, AcpToolSnapshot>();
+  private aborted = false;
+
+  constructor(
+    private readonly opts: Pick<
+      AcpDispatchOpts,
+      'broker' | 'sessionId' | 'chatId' | 'messageId' | 'taskId'
+    >,
+    private readonly worktreePath: string,
+  ) {}
+
+  get reasoningText(): string {
+    return this.reasoningChunks.join('');
+  }
+
+  get output(): string {
+    return this.textChunks.join('');
+  }
+
+  get snapshots(): AcpToolSnapshot[] {
+    return [...this.toolSnapshots.values()];
+  }
+
+  markAborted(): void {
+    this.aborted = true;
+    for (const snap of synthesizeCanceledSnapshots(this.toolSnapshots.values())) {
+      this.toolSnapshots.set(snap.toolCallId, snap);
+      this.publishToolSnapshot(snap);
+    }
+  }
+
+  private canStream(): boolean {
+    return !!(this.opts.broker && this.opts.sessionId && this.opts.chatId && this.opts.messageId);
+  }
+
+  private publishToolSnapshot(snapshot: AcpToolSnapshot): void {
+    if (!this.canStream()) return;
+    const wire = snapshotToWireToolCall(snapshot);
+    this.opts.broker!.publishFrame(this.opts.sessionId!, {
+      type: 'tool_call',
+      message_id: this.opts.messageId!,
+      chat_id: this.opts.chatId!,
+      tool_call: wire,
+    } as WsFrame);
+  }
+
+  handleToolUpdate(toolCallId: string, update: Parameters<typeof mergeToolSnapshot>[1]): void {
+    const previous = this.toolSnapshots.get(toolCallId);
+    const snapshot = mergeToolSnapshot(toolCallId, update, previous);
+    this.toolSnapshots.set(toolCallId, snapshot);
+    this.publishToolSnapshot(snapshot);
+  }
+
+  async handleSessionUpdate(params: SessionNotification): Promise<void> {
+    const update = params.update;
+    switch (update.sessionUpdate) {
+      case 'agent_message_chunk': {
+        const content = update.content;
+        if (content.type === 'text' && 'text' in content) {
+          const text = (content as { text: string }).text;
+          this.textChunks.push(text);
+          if (this.canStream()) {
+            this.opts.broker!.publishFrame(this.opts.sessionId!, {
+              type: 'delta',
+              message_id: this.opts.messageId!,
+              chat_id: this.opts.chatId!,
+              content: text,
+            } as WsFrame);
+          }
+        }
+        break;
+      }
+      case 'agent_thought_chunk': {
+        const content = update.content;
+        if (content.type === 'text' && 'text' in content) {
+          const text = (content as { text: string }).text;
+          this.reasoningChunks.push(text);
+          if (this.canStream()) {
+            this.opts.broker!.publishFrame(this.opts.sessionId!, {
+              type: 'reasoning_delta',
+              message_id: this.opts.messageId!,
+              chat_id: this.opts.chatId!,
+              content: text,
+            } as WsFrame);
+          }
+        }
+        break;
+      }
+      case 'tool_call':
+        this.handleToolUpdate(update.toolCallId, update);
+        break;
+      case 'tool_call_update':
+        this.handleToolUpdate(update.toolCallId, update);
+        break;
+      case 'available_commands_update': {
+        const commands = update.availableCommands.map((cmd) => ({
+          name: cmd.name,
+          description: cmd.description ?? undefined,
+        }));
+        if (this.opts.taskId && commands.length > 0) {
+          mergeTaskCommands(this.opts.taskId, commands);
+          if (this.canStream() && this.opts.sessionId) {
+            const all = getTaskCommands(this.opts.taskId) ?? commands;
+            this.opts.broker!.publishFrame(this.opts.sessionId, {
+              type: 'agent_commands',
+              task_id: this.opts.taskId,
+              session_id: this.opts.sessionId,
+              commands: all,
+            } as WsFrame);
+          }
+        }
+        break;
+      }
+      default:
+        break;
+    }
+  }
+
+  buildClient(agent: string, modeId: string | undefined, taskId: string | undefined, sessionId: string | undefined): Client {
+    return {
+      sessionUpdate: (params) => this.handleSessionUpdate(params),
+      requestPermission: async (params: RequestPermissionRequest): Promise<RequestPermissionResponse> => {
+        if (taskId && sessionId) {
+          return waitForPermissionResponse(taskId, sessionId, agent, modeId, params);
+        }
+        const firstOption = params.options[0];
+        if (firstOption) {
+          return { outcome: { outcome: 'selected', optionId: firstOption.optionId } };
+        }
+        return { outcome: { outcome: 'cancelled' } };
+      },
+      readTextFile: async (params: ReadTextFileRequest): Promise<ReadTextFileResponse> => {
+        const content = await readWorktreeTextFile(
+          this.worktreePath,
+          params.path,
+          params.line,
+          params.limit,
+        );
+        return { content };
+      },
+      writeTextFile: async (params: WriteTextFileRequest): Promise<WriteTextFileResponse> => {
+        await writeWorktreeTextFile(this.worktreePath, params.path, params.content);
+        return {};
+      },
+      createTerminal: async (_params: CreateTerminalRequest): Promise<CreateTerminalResponse> => {
+        return { terminalId: 'noop' };
+      },
+    };
+  }
+}
+
+export async function dispatchViaAcp(opts: AcpDispatchOpts): Promise<AcpDispatchResult> {
+  const {
+    agent,
+    task,
+    worktreePath,
+    installPath,
+    signal,
+    log,
+    taskId,
+    modeId,
+    sessionId,
+    chatId,
+    messageId,
+    broker,
+  } = opts;
+
+  const args = resolveAcpSpawnArgs(agent);
+  if (!args) {
+    return {
+      exitCode: 1,
+      output: `Agent '${agent}' does not support ACP.`,
+      toolSnapshots: [],
+      reasoningText: '',
+      stopReason: 'error',
+    };
+  }
+
+  const binary = installPath ?? agent;
+  log.info({ agent, binary, worktreePath, modeId, model: opts.model }, 'acp-dispatch: spawning');
+  const child = spawn(binary, args, {
+    cwd: worktreePath,
+    stdio: ['pipe', 'pipe', 'pipe'],
+    env: { ...process.env },
+  });
+
+  const streamCtx = new AcpStreamContext(
+    { broker, sessionId, chatId, messageId, taskId },
+    worktreePath,
+  );
+
+  let killed = false;
+  const cleanup = () => {
+    if (!killed) {
+      killed = true;
+      streamCtx.markAborted();
+      child.kill('SIGTERM');
+      setTimeout(() => child.kill('SIGKILL'), 5_000);
+    }
+    if (taskId) cancelPendingPermission(taskId);
+  };
+
+  if (signal) {
+    if (signal.aborted) {
+      cleanup();
+      return {
+        exitCode: 130,
+        output: 'Aborted before start',
+        toolSnapshots: streamCtx.snapshots,
+        reasoningText: '',
+        stopReason: 'cancelled',
+      };
+    }
+    signal.addEventListener('abort', cleanup, { once: true });
+  }
+
+  try {
+    const stream = createAcpNdJsonStream(child);
+    const connection = new ClientSideConnection(
+      () => streamCtx.buildClient(agent, modeId, taskId, sessionId),
+      stream,
+    );
+
+    await connection.initialize({
+      protocolVersion: 1,
+      clientInfo: { name: 'boocoder', version: '2.3.0' },
+      clientCapabilities: {},
+    });
+
+    const acpSession = await connection.newSession({ cwd: worktreePath, mcpServers: [] });
+    log.info({ sessionId: acpSession.sessionId }, 'acp-dispatch: session created');
+
+    await applySessionOverrides(connection, acpSession.sessionId, acpSession.configOptions, opts);
+
+    const promptResult = await connection.prompt({
+      sessionId: acpSession.sessionId,
+      prompt: [{ type: 'text', text: task }],
+    });
+
+    const stopReason = promptResult.stopReason ?? 'end_turn';
+    log.info(
+      { agent, stopReason, toolCallCount: streamCtx.snapshots.length, reasoningChars: streamCtx.reasoningText.length },
+      'acp-dispatch: prompt completed',
+    );
+
+    await connection.closeSession({ sessionId: acpSession.sessionId }).catch(() => {});
+
+    return {
+      exitCode: 0,
+      output: streamCtx.output,
+      toolSnapshots: streamCtx.snapshots,
+      reasoningText: streamCtx.reasoningText,
+      stopReason,
+    };
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    log.error({ agent, err: message }, 'acp-dispatch: error');
+    return {
+      exitCode: 1,
+      output: message,
+      toolSnapshots: streamCtx.snapshots,
+      reasoningText: streamCtx.reasoningText,
+      stopReason: 'error',
+    };
+  } finally {
+    if (signal) signal.removeEventListener('abort', cleanup);
+    cleanup();
+    await new Promise<void>((resolve) => {
+      child.on('close', resolve);
+      setTimeout(resolve, 3_000);
+    });
+  }
+}

apps/coder/src/services/acp-probe.ts

@@ -0,0 +1,155 @@
+/**
+ * Short-lived ACP probe — opens a session and reads models/modes from the response.
+ */
+import { spawn } from 'node:child_process';
+import {
+  ClientSideConnection,
+  type Client,
+  type NewSessionResponse,
+  type ReadTextFileRequest,
+  type ReadTextFileResponse,
+  type WriteTextFileRequest,
+  type WriteTextFileResponse,
+  type CreateTerminalRequest,
+  type CreateTerminalResponse,
+  type RequestPermissionRequest,
+  type RequestPermissionResponse,
+} from '@agentclientprotocol/sdk';
+import { deriveModesFromACP, deriveModelDefinitionsFromACP } from './acp-derive.js';
+import { getManifestDefaultModeId, getManifestModes } from './provider-manifest.js';
+import { resolveAcpSpawnArgs } from './acp-spawn.js';
+import { createAcpNdJsonStream } from './acp-stream.js';
+import type { ProviderModel, ProviderMode } from './provider-types.js';
+import type { AgentCommand } from './agent-commands-cache.js';
+
+const PROBE_TIMEOUT_MS = 30_000;
+
+export interface AcpProbeResult {
+  ok: boolean;
+  models: ProviderModel[];
+  modes: ProviderMode[];
+  defaultModeId: string | null;
+  commands: AgentCommand[];
+  error?: string;
+}
+
+function parseSessionResponse(session: NewSessionResponse, agent: string): AcpProbeResult {
+  const fallbackModes = getManifestModes(agent);
+  const { modes, currentModeId } = deriveModesFromACP(
+    fallbackModes,
+    session.modes,
+    session.configOptions,
+  );
+  const models = deriveModelDefinitionsFromACP(session.models, session.configOptions);
+
+  return {
+    ok: true,
+    models,
+    modes,
+    defaultModeId: currentModeId ?? getManifestDefaultModeId(agent),
+    commands: [],
+  };
+}
+
+export async function probeAcpProvider(
+  agent: string,
+  installPath: string,
+  cwd: string,
+): Promise<AcpProbeResult> {
+  const args = resolveAcpSpawnArgs(agent);
+  if (!args) {
+    return {
+      ok: false,
+      models: [],
+      modes: getManifestModes(agent),
+      defaultModeId: getManifestDefaultModeId(agent),
+      commands: [],
+      error: 'no ACP spawn args',
+    };
+  }
+
+  const child = spawn(installPath, args, {
+    cwd,
+    stdio: ['pipe', 'pipe', 'pipe'],
+    env: { ...process.env },
+  });
+
+  let killed = false;
+  const kill = () => {
+    if (!killed) {
+      killed = true;
+      child.kill('SIGTERM');
+      setTimeout(() => child.kill('SIGKILL'), 2_000);
+    }
+  };
+
+  const timeout = setTimeout(kill, PROBE_TIMEOUT_MS);
+
+  const probedCommands: AgentCommand[] = [];
+
+  try {
+    const stream = createAcpNdJsonStream(child);
+
+    const connection = new ClientSideConnection(
+      (_agentInterface): Client => ({
+        async sessionUpdate(params) {
+          const update = params.update;
+          if (update.sessionUpdate === 'available_commands_update') {
+            for (const cmd of update.availableCommands) {
+              probedCommands.push({
+                name: cmd.name,
+                description: cmd.description ?? undefined,
+              });
+            }
+          }
+        },
+        async requestPermission(params: RequestPermissionRequest): Promise<RequestPermissionResponse> {
+          const first = params.options[0];
+          if (first) {
+            return { outcome: { outcome: 'selected', optionId: first.optionId } };
+          }
+          return { outcome: { outcome: 'cancelled' } };
+        },
+        async readTextFile(_params: ReadTextFileRequest): Promise<ReadTextFileResponse> {
+          return { content: '' };
+        },
+        async writeTextFile(_params: WriteTextFileRequest): Promise<WriteTextFileResponse> {
+          return {};
+        },
+        async createTerminal(_params: CreateTerminalRequest): Promise<CreateTerminalResponse> {
+          return { terminalId: 'noop' };
+        },
+      }),
+      stream,
+    );
+
+    await connection.initialize({
+      protocolVersion: 1,
+      clientInfo: { name: 'boocoder-probe', version: '2.2.0' },
+      clientCapabilities: {},
+    });
+
+    const session = await connection.newSession({ cwd, mcpServers: [] });
+    const result = parseSessionResponse(session, agent);
+    result.commands = probedCommands;
+    await connection.closeSession({ sessionId: session.sessionId }).catch(() => {});
+    return result;
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    return {
+      ok: false,
+      models: [],
+      modes: getManifestModes(agent),
+      defaultModeId: getManifestDefaultModeId(agent),
+      commands: probedCommands,
+      error: message,
+    };
+  } finally {
+    clearTimeout(timeout);
+    kill();
+    await new Promise<void>((resolve) => {
+      child.on('close', resolve);
+      setTimeout(resolve, 2_000);
+    });
+  }
+}

apps/coder/src/services/acp-spawn.ts

@@ -0,0 +1,29 @@
+/**
+ * Resolve ACP spawn argv per provider (host-probe verified 2026-05-25).
+ */
+export function resolveAcpSpawnArgs(agent: string): string[] | null {
+  switch (agent) {
+    case 'opencode':
+    case 'goose':
+      return ['acp'];
+    case 'cursor':
+      return ['acp'];
+    case 'copilot':
+      return ['--acp'];
+    case 'qwen':
+      return ['--acp'];
+    default:
+      return null;
+  }
+}
+
+export function resolveAcpProbeBinaries(agent: string): string[] {
+  switch (agent) {
+    case 'cursor':
+      return ['cursor-agent', 'agent'];
+    case 'copilot':
+      return ['copilot'];
+    default:
+      return [agent];
+  }
+}

apps/coder/src/services/acp-stream.ts

@@ -0,0 +1,44 @@
+import { Readable, Writable } from 'node:stream';
+import type { ChildProcess } from 'node:child_process';
+import { ndJsonStream } from '@agentclientprotocol/sdk';
+
+export function nodeReadableToWeb(nodeStream: NodeJS.ReadableStream): ReadableStream<Uint8Array> {
+  return new ReadableStream<Uint8Array>({
+    start(controller) {
+      nodeStream.on('data', (chunk: Buffer) => controller.enqueue(new Uint8Array(chunk)));
+      nodeStream.on('end', () => controller.close());
+      nodeStream.on('error', (err) => controller.error(err));
+    },
+    cancel() {
+      if ('destroy' in nodeStream && typeof (nodeStream as Readable).destroy === 'function') {
+        (nodeStream as Readable).destroy();
+      }
+    },
+  });
+}
+
+export function nodeWritableToWeb(nodeStream: NodeJS.WritableStream): WritableStream<Uint8Array> {
+  return new WritableStream<Uint8Array>({
+    write(chunk) {
+      return new Promise<void>((resolve, reject) => {
+        const ok = (nodeStream as Writable).write(chunk, (err) => {
+          if (err) reject(err);
+        });
+        if (ok) resolve();
+        else (nodeStream as Writable).once('drain', resolve);
+      });
+    },
+    close() {
+      return new Promise<void>((resolve) => {
+        (nodeStream as Writable).end(resolve);
+      });
+    },
+    abort() {
+      (nodeStream as Writable).destroy();
+    },
+  });
+}
+
+export function createAcpNdJsonStream(child: ChildProcess) {
+  return ndJsonStream(nodeWritableToWeb(child.stdin!), nodeReadableToWeb(child.stdout!));
+}

apps/coder/src/services/acp-tool-snapshot.ts

@@ -0,0 +1,120 @@
+/**
+ * ACP tool snapshot merge + wire mapping — lifted from Paseo acp-agent.ts patterns.
+ * Stable toolCallId, merge on tool_call_update, status lifecycle for UI + DB.
+ */
+import type { ToolCall, ToolCallUpdate, ToolCallStatus, ToolKind } from '@agentclientprotocol/sdk';
+
+export type AcpToolLifecycleStatus = 'running' | 'completed' | 'failed' | 'canceled';
+
+export interface AcpToolSnapshot {
+  toolCallId: string;
+  title: string;
+  kind?: ToolKind | null;
+  status?: ToolCallStatus | null;
+  rawInput?: unknown;
+  rawOutput?: unknown;
+}
+
+export interface AcpWireMeta {
+  status: AcpToolLifecycleStatus;
+  kind?: string | null;
+  title?: string;
+  output?: unknown;
+  error?: string;
+}
+
+function coalesceDefined<T>(next: T | null | undefined, previous: T | null | undefined, fallback: T | null): T | null {
+  if (next !== undefined && next !== null) return next;
+  if (previous !== undefined && previous !== null) return previous;
+  return fallback;
+}
+
+export function mergeToolSnapshot(
+  toolCallId: string,
+  update: ToolCall | ToolCallUpdate,
+  previous?: AcpToolSnapshot,
+): AcpToolSnapshot {
+  return {
+    toolCallId,
+    title: update.title ?? previous?.title ?? toolCallId,
+    kind: update.kind ?? previous?.kind ?? null,
+    status: update.status ?? previous?.status ?? null,
+    rawInput: update.rawInput !== undefined ? update.rawInput : previous?.rawInput,
+    rawOutput: update.rawOutput !== undefined ? update.rawOutput : previous?.rawOutput,
+  };
+}
+
+export function mapToolLifecycleStatus(
+  status: ToolCallStatus | null | undefined,
+  rawOutput?: unknown,
+): AcpToolLifecycleStatus {
+  if (rawOutput === 'canceled') return 'canceled';
+  switch (status) {
+    case 'completed':
+      return 'completed';
+    case 'failed':
+      return 'failed';
+    case 'pending':
+    case 'in_progress':
+    default:
+      return 'running';
+  }
+}
+
+function readErrorMessage(rawOutput: unknown): string | undefined {
+  if (typeof rawOutput === 'string' && rawOutput.trim()) return rawOutput;
+  if (rawOutput && typeof rawOutput === 'object' && !Array.isArray(rawOutput)) {
+    const rec = rawOutput as Record<string, unknown>;
+    const msg = rec.message ?? rec.error ?? rec.reason;
+    if (typeof msg === 'string' && msg.trim()) return msg;
+  }
+  return undefined;
+}
+
+function asRecord(value: unknown): Record<string, unknown> {
+  if (value && typeof value === 'object' && !Array.isArray(value)) {
+    return value as Record<string, unknown>;
+  }
+  return {};
+}
+
+export function snapshotToWireToolCall(snapshot: AcpToolSnapshot): {
+  id: string;
+  name: string;
+  args: Record<string, unknown>;
+} {
+  const lifecycle = mapToolLifecycleStatus(snapshot.status, snapshot.rawOutput);
+  const input = asRecord(snapshot.rawInput);
+  const error = lifecycle === 'failed' ? readErrorMessage(snapshot.rawOutput) : undefined;
+  const meta: AcpWireMeta = {
+    status: lifecycle,
+    kind: snapshot.kind ?? null,
+    title: snapshot.title,
+    ...(snapshot.rawOutput !== undefined ? { output: snapshot.rawOutput } : {}),
+    ...(error ? { error } : {}),
+  };
+  return {
+    id: snapshot.toolCallId,
+    name: String(snapshot.kind ?? snapshot.title),
+    args: { ...input, _acp: meta },
+  };
+}
+
+export function snapshotToPartPayload(snapshot: AcpToolSnapshot): {
+  id: string;
+  name: string;
+  args: Record<string, unknown>;
+} {
+  const wire = snapshotToWireToolCall(snapshot);
+  return { id: wire.id, name: wire.name, args: wire.args };
+}
+
+export function synthesizeCanceledSnapshots(snapshots: Iterable<AcpToolSnapshot>): AcpToolSnapshot[] {
+  const out: AcpToolSnapshot[] = [];
+  for (const snapshot of snapshots) {
+    if (mapToolLifecycleStatus(snapshot.status) === 'running') {
+      out.push({ ...snapshot, status: 'failed', rawOutput: snapshot.rawOutput ?? 'canceled' });
+    }
+  }
+  return out;
+}

apps/coder/src/services/agent-commands-cache.ts

@@ -0,0 +1,28 @@
+/** In-memory cache of ACP available_commands_update per task. */
+
+import type { AgentCommand } from './provider-types.js';
+import { mergeCommands } from './provider-commands.js';
+
+export type { AgentCommand };
+
+const commandsByTask = new Map<string, AgentCommand[]>();
+
+export function setTaskCommands(taskId: string, commands: AgentCommand[]): void {
+  if (commands.length === 0) return;
+  commandsByTask.set(taskId, commands);
+}
+
+/** Merge by command name; later lists override earlier entries. */
+export function mergeTaskCommands(taskId: string, commands: AgentCommand[]): void {
+  if (commands.length === 0) return;
+  const merged = mergeCommands(commandsByTask.get(taskId) ?? [], commands);
+  commandsByTask.set(taskId, merged);
+}
+
+export function getTaskCommands(taskId: string): AgentCommand[] | null {
+  return commandsByTask.get(taskId) ?? null;
+}
+
+export function clearTaskCommands(taskId: string): void {
+  commandsByTask.delete(taskId);
+}

apps/coder/src/services/agent-probe.ts

@@ -0,0 +1,115 @@
+import type { Sql } from '../db.js';
+import type { FastifyBaseLogger } from 'fastify';
+import { exec as execCb } from 'node:child_process';
+import { promisify } from 'node:util';
+import { PROVIDERS_BY_NAME, PROBED_AGENT_NAMES } from './provider-registry.js';
+import { resolveAcpProbeBinaries } from './acp-spawn.js';
+import { clearProviderSnapshotCache } from './provider-snapshot.js';
+import { readQwenSettingsModels } from './qwen-settings.js';
+
+const exec = promisify(execCb);
+
+async function resolveInstallPath(agentName: string): Promise<string | null> {
+  const candidates = resolveAcpProbeBinaries(agentName);
+  for (const bin of candidates) {
+    try {
+      const { stdout } = await exec(`which ${bin}`, { timeout: 10_000 });
+      const path = stdout.trim();
+      if (path) return path;
+    } catch {
+      /* try next */
+    }
+  }
+  return null;
+}
+
+async function detectAcpSupport(agentName: string, installPath: string): Promise<boolean> {
+  const transport = PROVIDERS_BY_NAME.get(agentName)?.transport;
+  if (transport !== 'acp') return false;
+
+  if (agentName === 'copilot') {
+    try {
+      const { stdout } = await exec(`"${installPath}" --help`, { timeout: 10_000 });
+      return stdout.includes('--acp');
+    } catch {
+      return false;
+    }
+  }
+
+  if (agentName === 'qwen') {
+    try {
+      const { stdout } = await exec(`"${installPath}" --help`, { timeout: 10_000 });
+      return stdout.includes('--acp');
+    } catch {
+      return false;
+    }
+  }
+
+  try {
+    await exec(`"${installPath}" acp --help`, { timeout: 10_000 });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Probe for available agents on the HOST.
+ */
+export async function probeAgents(sql: Sql, log: FastifyBaseLogger): Promise<void> {
+  clearProviderSnapshotCache();
+  log.info('agent-probe: scanning for known agents');
+
+  for (const agentName of PROBED_AGENT_NAMES) {
+    try {
+      const installPath = await resolveInstallPath(agentName);
+      if (!installPath) continue;
+
+      let version: string | null = null;
+      try {
+        const { stdout: verOut } = await exec(`"${installPath}" --version`, { timeout: 15_000 });
+        version = verOut.trim().slice(0, 100);
+      } catch {
+        /* optional */
+      }
+
+      const providerDef = PROVIDERS_BY_NAME.get(agentName);
+      let supportsAcp = providerDef?.transport === 'acp';
+      if (supportsAcp) {
+        supportsAcp = await detectAcpSupport(agentName, installPath);
+      }
+
+      let models: Array<{ id: string; label: string }> = [];
+      if (providerDef?.modelSource === 'static' && providerDef.staticModels) {
+        models = providerDef.staticModels;
+      }
+
+      if (agentName === 'qwen') {
+        models = await readQwenSettingsModels();
+      }
+
+      const label = providerDef?.label ?? agentName;
+      const transport =
+        providerDef?.transport === 'acp' && !supportsAcp ? 'pty' : (providerDef?.transport ?? 'pty');
+
+      await sql`
+        INSERT INTO available_agents (name, install_path, version, supports_acp, last_probed_at, models, label, transport)
+        VALUES (${agentName}, ${installPath}, ${version}, ${supportsAcp}, clock_timestamp(), ${sql.json(models as never)}, ${label}, ${transport})
+        ON CONFLICT (name) DO UPDATE SET
+          install_path = EXCLUDED.install_path,
+          version = EXCLUDED.version,
+          supports_acp = EXCLUDED.supports_acp,
+          last_probed_at = EXCLUDED.last_probed_at,
+          models = EXCLUDED.models,
+          label = EXCLUDED.label,
+          transport = EXCLUDED.transport
+      `;
+      log.info({ agent: agentName, version, installPath, supportsAcp, modelCount: models.length }, 'agent-probe: found');
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err);
+      log.debug({ agent: agentName, err: msg }, 'agent-probe: not found');
+    }
+  }
+
+  log.info('agent-probe: scan complete');
+}

apps/coder/src/services/agent-turn-persist.ts

@@ -0,0 +1,56 @@
+import type { Sql } from '../db.js';
+import type { AcpToolSnapshot } from './acp-tool-snapshot.js';
+import { snapshotToPartPayload } from './acp-tool-snapshot.js';
+
+interface PartInsert {
+  message_id: string;
+  sequence: number;
+  kind: 'reasoning' | 'tool_call';
+  payload: unknown;
+}
+
+async function insertParts(sql: Sql, parts: PartInsert[]): Promise<void> {
+  if (parts.length === 0) return;
+  await sql`
+    INSERT INTO message_parts ${sql(
+      parts.map((p) => ({
+        message_id: p.message_id,
+        sequence: p.sequence,
+        kind: p.kind,
+        payload: sql.json(p.payload as never),
+      })),
+      'message_id',
+      'sequence',
+      'kind',
+      'payload',
+    )}
+  `;
+}
+
+/** Persist external-agent reasoning + tool calls into message_parts for reload. */
+export async function persistExternalAgentTurn(
+  sql: Sql,
+  assistantMessageId: string,
+  snapshots: AcpToolSnapshot[],
+  reasoningText: string,
+): Promise<void> {
+  const parts: PartInsert[] = [];
+  let seq = 0;
+  if (reasoningText.trim()) {
+    parts.push({
+      message_id: assistantMessageId,
+      sequence: seq++,
+      kind: 'reasoning',
+      payload: { text: reasoningText },
+    });
+  }
+  for (const snapshot of snapshots) {
+    parts.push({
+      message_id: assistantMessageId,
+      sequence: seq++,
+      kind: 'tool_call',
+      payload: snapshotToPartPayload(snapshot),
+    });
+  }
+  await insertParts(sql, parts);
+}

apps/coder/src/services/cursor-models.ts

@@ -0,0 +1,39 @@
+/**
+ * Cursor model list parser — lifted from Paseo cursor-acp-agent.ts
+ */
+import type { ProviderModel } from './provider-types.js';
+
+const CURSOR_MODEL_MARKER_PATTERN = /\s+\((?:default|current)\)$/;
+
+export function parseCursorAgentModelsOutput(output: string): ProviderModel[] {
+  const parsed = output
+    .split(/\r?\n/)
+    .map((line) => line.trim())
+    .filter((line) => line && line !== 'Available models' && !line.startsWith('Tip:'))
+    .map((line) => {
+      const separatorIndex = line.indexOf(' - ');
+      if (separatorIndex <= 0) return null;
+
+      const id = line.slice(0, separatorIndex).trim();
+      const rawLabel = line.slice(separatorIndex + 3).trim();
+      if (!id || !rawLabel) return null;
+
+      let marker: 'default' | 'current' | null = null;
+      if (rawLabel.endsWith(' (default)')) marker = 'default';
+      else if (rawLabel.endsWith(' (current)')) marker = 'current';
+
+      return { id, label: rawLabel.replace(CURSOR_MODEL_MARKER_PATTERN, ''), marker };
+    })
+    .filter((m): m is { id: string; label: string; marker: 'default' | 'current' | null } => m !== null);
+
+  const defaultModelId =
+    parsed.find((m) => m.marker === 'default')?.id ??
+    parsed.find((m) => m.marker === 'current')?.id ??
+    parsed[0]?.id;
+
+  return parsed.map((model) => ({
+    id: model.id,
+    label: model.label,
+    isDefault: model.id === defaultModelId,
+  }));
+}

apps/coder/src/services/dispatcher.ts

@@ -0,0 +1,487 @@
+import type { Sql } from '../db.js';
+import type { FastifyBaseLogger } from 'fastify';
+import type { Broker } from '@boocode/server/broker';
+import type { WsFrame } from '@boocode/server/ws-frames';
+import type { Config } from '../config.js';
+import { createWorktree, diffWorktree, cleanupWorktree } from './worktrees.js';
+import { dispatchViaAcp } from './acp-dispatch.js';
+import { dispatchViaPty } from './pty-dispatch.js';
+import { clearTaskCommands, setTaskCommands } from './agent-commands-cache.js';
+import { getManifestCommands } from './provider-commands.js';
+import { persistExternalAgentTurn } from './agent-turn-persist.js';
+
+interface InferenceRunner {
+  enqueue: (sessionId: string, chatId: string, assistantId: string, user: string) => void;
+  cancel: (sessionId: string, chatId: string) => Promise<boolean>;
+  hasActive: (chatId: string) => boolean;
+}
+
+interface Deps {
+  sql: Sql;
+  inference: InferenceRunner;
+  broker: Broker;
+  log: FastifyBaseLogger;
+  config: Config;
+}
+
+const POLL_INTERVAL_MS = 5_000;
+const COMPLETION_POLL_MS = 2_000;
+
+export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<void> } {
+  const { sql, inference, broker, log, config } = deps;
+  let timer: ReturnType<typeof setInterval> | null = null;
+  let running = false;
+  let stopping = false;
+  let inflightPromise: Promise<void> | null = null;
+
+  async function poll(): Promise<void> {
+    if (running || stopping) return;
+
+    // Grab one pending task
+    const rows = await sql<{
+      id: string;
+      project_id: string;
+      input: string;
+      agent: string | null;
+      model: string | null;
+      mode_id: string | null;
+      thinking_option_id: string | null;
+      session_id: string | null;
+    }[]>`
+      SELECT id, project_id, input, agent, model, mode_id, thinking_option_id, session_id
+      FROM tasks
+      WHERE state = 'pending'
+      ORDER BY created_at
+      LIMIT 1
+    `;
+    if (rows.length === 0) return;
+
+    const task = rows[0]!;
+    running = true;
+    inflightPromise = runTask(task).finally(() => {
+      running = false;
+      inflightPromise = null;
+    });
+  }
+
+  async function runTask(task: {
+    id: string;
+    project_id: string;
+    input: string;
+    agent: string | null;
+    model: string | null;
+    mode_id: string | null;
+    thinking_option_id: string | null;
+    session_id: string | null;
+  }): Promise<void> {
+    const taskId = task.id;
+
+    // Determine execution path: if agent is specified AND exists in available_agents → Path B
+    if (task.agent) {
+      const [agentRow] = await sql<{ name: string; supports_acp: boolean; install_path: string | null }[]>`
+        SELECT name, supports_acp, install_path FROM available_agents WHERE name = ${task.agent}
+      `;
+      if (agentRow) {
+        await runExternalAgent(task, agentRow.supports_acp, agentRow.install_path);
+        return;
+      }
+      // Agent specified but not available — fall through to Path A with a warning
+      log.warn({ taskId, agent: task.agent }, 'dispatcher: specified agent not available, falling back to native');
+    }
+
+    // Path A — native inference (existing behavior)
+    await runNativeInference(task);
+  }
+
+  // ─── Path A: Native Inference ───────────────────────────────────────────────
+
+  async function runNativeInference(task: { id: string; project_id: string; input: string; agent: string | null; model: string | null; session_id: string | null }): Promise<void> {
+    const taskId = task.id;
+    log.info({ taskId }, 'dispatcher: starting task (path A — native)');
+
+    try {
+      // Mark running
+      await sql`
+        UPDATE tasks
+        SET state = 'running', started_at = clock_timestamp(), execution_path = 'native'
+        WHERE id = ${taskId}
+      `;
+
+      // Create session + chat for this task
+      const model = task.model ?? config.DEFAULT_MODEL;
+      const sessionName = 'Task: ' + task.input.slice(0, 40);
+
+      const [session] = await sql<{ id: string }[]>`
+        INSERT INTO sessions (project_id, name, model, status)
+        VALUES (${task.project_id}, ${sessionName}, ${model}, 'open')
+        RETURNING id
+      `;
+      const sessionId = session!.id;
+
+      const [chat] = await sql<{ id: string }[]>`
+        INSERT INTO chats (session_id, name, status)
+        VALUES (${sessionId}, 'Task execution', 'open')
+        RETURNING id
+      `;
+      const chatId = chat!.id;
+
+      // Link task to session
+      await sql`UPDATE tasks SET session_id = ${sessionId} WHERE id = ${taskId}`;
+
+      // Create user message + streaming assistant
+      await sql<{ id: string }[]>`
+        INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+        VALUES (${sessionId}, ${chatId}, 'user', ${task.input}, 'complete', clock_timestamp())
+        RETURNING id
+      `;
+      const [assistantMsg] = await sql<{ id: string }[]>`
+        INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+        VALUES (${sessionId}, ${chatId}, 'assistant', '', 'streaming', clock_timestamp())
+        RETURNING id
+      `;
+      const assistantId = assistantMsg!.id;
+
+      // Enqueue inference
+      inference.enqueue(sessionId, chatId, assistantId, 'default');
+
+      // Wait for inference to complete (poll message status)
+      const finalStatus = await waitForCompletion(assistantId);
+
+      if (stopping) {
+        await sql`
+          UPDATE tasks
+          SET state = 'cancelled', ended_at = clock_timestamp()
+          WHERE id = ${taskId}
+        `;
+        return;
+      }
+
+      // Aggregate token cost for the task's session
+      const [costRow] = await sql<{ total: number | null }[]>`
+        SELECT SUM(tokens_used)::int AS total
+        FROM messages
+        WHERE session_id = ${sessionId} AND tokens_used IS NOT NULL
+      `;
+      const costTokens = costRow?.total ?? null;
+
+      if (finalStatus === 'complete') {
+        const [msg] = await sql<{ content: string | null }[]>`
+          SELECT content FROM messages WHERE id = ${assistantId}
+        `;
+        const summary = (msg?.content ?? '').slice(0, 500);
+        await sql`
+          UPDATE tasks
+          SET state = 'completed', ended_at = clock_timestamp(), output_summary = ${summary}, cost_tokens = ${costTokens}
+          WHERE id = ${taskId}
+        `;
+        log.info({ taskId, costTokens }, 'dispatcher: task completed (native)');
+      } else {
+        const [msg] = await sql<{ content: string | null }[]>`
+          SELECT content FROM messages WHERE id = ${assistantId}
+        `;
+        const summary = (msg?.content ?? 'Inference failed').slice(0, 500);
+        await sql`
+          UPDATE tasks
+          SET state = 'failed', ended_at = clock_timestamp(), output_summary = ${summary}, cost_tokens = ${costTokens}
+          WHERE id = ${taskId}
+        `;
+        log.warn({ taskId, finalStatus }, 'dispatcher: task failed (native)');
+      }
+    } catch (err) {
+      const errMsg = err instanceof Error ? err.message : String(err);
+      log.error({ taskId, err: errMsg }, 'dispatcher: task error (native)');
+      await sql`
+        UPDATE tasks
+        SET state = 'failed', ended_at = clock_timestamp(), output_summary = ${errMsg.slice(0, 500)}
+        WHERE id = ${taskId}
+      `.catch(() => {});
+    }
+  }
+
+  // ─── Path B: External Agent Dispatch ──────<E29480><E29480><EFBFBD>─────────────────────────────────
+
+  async function runExternalAgent(
+    task: {
+      id: string;
+      project_id: string;
+      input: string;
+      agent: string | null;
+      model: string | null;
+      mode_id: string | null;
+      thinking_option_id: string | null;
+      session_id: string | null;
+    },
+    supportsAcp: boolean,
+    installPath: string | null,
+  ): Promise<void> {
+    const taskId = task.id;
+    const agent = task.agent!;
+    const executionPath = supportsAcp ? 'acp' : 'pty';
+
+    log.info({ taskId, agent, executionPath }, 'dispatcher: starting task (path B — external)');
+
+    // Resolve the project's root path
+    const [project] = await sql<{ path: string | null }[]>`
+      SELECT path FROM projects WHERE id = ${task.project_id}
+    `;
+    const projectPath = project?.path;
+    if (!projectPath) {
+      await sql`
+        UPDATE tasks
+        SET state = 'failed', ended_at = clock_timestamp(), output_summary = 'Project has no path — cannot create worktree'
+        WHERE id = ${taskId}
+      `;
+      return;
+    }
+
+    // Create an abort controller for this task
+    const ac = new AbortController();
+
+    try {
+      // Mark running
+      await sql`
+        UPDATE tasks
+        SET state = 'running', started_at = clock_timestamp(), execution_path = ${executionPath}
+        WHERE id = ${taskId}
+      `;
+
+      let sessionId: string;
+      let chatId: string;
+
+      if (task.session_id) {
+        sessionId = task.session_id;
+        const chats = await sql<{ id: string }[]>`
+          SELECT id FROM chats WHERE session_id = ${sessionId} AND status = 'open' ORDER BY created_at DESC LIMIT 1
+        `;
+        if (chats.length === 0) {
+          const [chat] = await sql<{ id: string }[]>`
+            INSERT INTO chats (session_id, name, status)
+            VALUES (${sessionId}, 'External agent execution', 'open')
+            RETURNING id
+          `;
+          chatId = chat!.id;
+        } else {
+          chatId = chats[0]!.id;
+        }
+      } else {
+        const sessionName = `Task [${agent}]: ${task.input.slice(0, 30)}`;
+        const [session] = await sql<{ id: string }[]>`
+          INSERT INTO sessions (project_id, name, model, status)
+          VALUES (${task.project_id}, ${sessionName}, ${task.model ?? config.DEFAULT_MODEL}, 'open')
+          RETURNING id
+        `;
+        sessionId = session!.id;
+
+        const [chat] = await sql<{ id: string }[]>`
+          INSERT INTO chats (session_id, name, status)
+          VALUES (${sessionId}, 'External agent execution', 'open')
+          RETURNING id
+        `;
+        chatId = chat!.id;
+
+        await sql`UPDATE tasks SET session_id = ${sessionId} WHERE id = ${taskId}`;
+      }
+
+      if (!task.session_id) {
+        await sql`
+          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+          VALUES (${sessionId}, ${chatId}, 'user', ${task.input}, 'complete', clock_timestamp())
+        `;
+      }
+
+      // Step 1: Create worktree
+      log.info({ taskId, projectPath }, 'dispatcher: creating worktree');
+      const worktreePath = await createWorktree(projectPath, taskId, { signal: ac.signal });
+      log.info({ taskId, worktreePath }, 'dispatcher: worktree created');
+
+      // Step 2: Dispatch to agent
+      let outputSummary: string;
+      let assistantContent = '';
+      let acpReasoning = '';
+
+      const [assistantMsg] = await sql<{ id: string }[]>`
+        INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+        VALUES (${sessionId}, ${chatId}, 'assistant', '', 'streaming', clock_timestamp())
+        RETURNING id
+      `;
+      const assistantId = assistantMsg!.id;
+
+      broker.publishFrame(sessionId, {
+        type: 'message_started',
+        message_id: assistantId,
+        chat_id: chatId,
+        role: 'assistant',
+      } as WsFrame);
+
+      const manifestCommands = getManifestCommands(agent);
+      if (manifestCommands.length > 0) {
+        setTaskCommands(taskId, manifestCommands);
+        broker.publishFrame(sessionId, {
+          type: 'agent_commands',
+          task_id: taskId,
+          session_id: sessionId,
+          commands: manifestCommands,
+        } as WsFrame);
+      }
+
+      if (supportsAcp) {
+        const result = await dispatchViaAcp({
+          agent,
+          task: task.input,
+          worktreePath,
+          installPath: installPath ?? undefined,
+          model: task.model ?? undefined,
+          modeId: task.mode_id ?? undefined,
+          thinkingOptionId: task.thinking_option_id ?? undefined,
+          taskId,
+          sessionId,
+          chatId,
+          messageId: assistantId,
+          broker,
+          signal: ac.signal,
+          log,
+        });
+        assistantContent = result.output.slice(0, 50_000);
+        acpReasoning = result.reasoningText.slice(0, 200_000);
+        outputSummary = result.output.slice(0, 500);
+        await persistExternalAgentTurn(sql, assistantId, result.toolSnapshots, acpReasoning);
+      } else {
+        const result = await dispatchViaPty({
+          agent,
+          task: task.input,
+          worktreePath,
+          installPath: installPath ?? undefined,
+          model: task.model ?? undefined,
+          modeId: task.mode_id ?? undefined,
+          thinkingOptionId: task.thinking_option_id ?? undefined,
+          signal: ac.signal,
+          log,
+        });
+        assistantContent = (result.stdout || result.stderr || '(no output)').slice(0, 50_000);
+        outputSummary = (result.stdout || result.stderr).slice(0, 500);
+
+        if (assistantContent) {
+          broker.publishFrame(sessionId, {
+            type: 'delta',
+            message_id: assistantId,
+            chat_id: chatId,
+            content: assistantContent,
+          } as WsFrame);
+        }
+      }
+
+      await sql`
+        UPDATE messages
+        SET content = ${assistantContent}, status = 'complete', finished_at = clock_timestamp()
+        WHERE id = ${assistantId}
+      `;
+
+      broker.publishFrame(sessionId, {
+        type: 'message_complete',
+        message_id: assistantId,
+        chat_id: chatId,
+      } as WsFrame);
+
+      if (stopping) {
+        await sql`
+          UPDATE tasks SET state = 'cancelled', ended_at = clock_timestamp() WHERE id = ${taskId}
+        `;
+        await cleanupWorktree(projectPath, taskId);
+        return;
+      }
+
+      // Step 3: Diff the worktree and queue pending changes
+      log.info({ taskId }, 'dispatcher: diffing worktree');
+      const diff = await diffWorktree(worktreePath, projectPath, { signal: ac.signal });
+
+      if (diff) {
+        // Queue a single pending_change entry with the full unified diff
+        await sql`
+          INSERT INTO pending_changes (session_id, task_id, file_path, operation, diff)
+          VALUES (${sessionId}, ${taskId}, ${projectPath}, 'edit', ${diff})
+        `;
+        log.info({ taskId, diffLength: diff.length }, 'dispatcher: diff queued as pending change');
+      } else {
+        log.info({ taskId }, 'dispatcher: no changes detected in worktree');
+      }
+
+      // Step 4: Cleanup worktree
+      await cleanupWorktree(projectPath, taskId);
+
+      // Step 5: Aggregate token cost
+      const [extCostRow] = await sql<{ total: number | null }[]>`
+        SELECT SUM(tokens_used)::int AS total
+        FROM messages
+        WHERE session_id = ${sessionId} AND tokens_used IS NOT NULL
+      `;
+      const extCostTokens = extCostRow?.total ?? null;
+
+      // Step 6: Mark task completed
+      await sql`
+        UPDATE tasks
+        SET state = 'completed', ended_at = clock_timestamp(), output_summary = ${outputSummary}, cost_tokens = ${extCostTokens}
+        WHERE id = ${taskId}
+      `;
+      log.info({ taskId, agent, costTokens: extCostTokens }, 'dispatcher: task completed (external)');
+      clearTaskCommands(taskId);
+
+    } catch (err) {
+      const errMsg = err instanceof Error ? err.message : String(err);
+      log.error({ taskId, agent, err: errMsg }, 'dispatcher: external agent error');
+
+      await sql`
+        UPDATE tasks
+        SET state = 'failed', ended_at = clock_timestamp(), output_summary = ${errMsg.slice(0, 500)}
+        WHERE id = ${taskId}
+      `.catch(() => {});
+
+      // Best-effort cleanup
+      await cleanupWorktree(projectPath, taskId);
+      clearTaskCommands(taskId);
+    }
+  }
+
+  // ─── Helpers ────────────────────────────────────────────────────────────────
+
+  async function waitForCompletion(assistantId: string): Promise<string> {
+    for (;;) {
+      if (stopping) return 'cancelled';
+
+      const [row] = await sql<{ status: string }[]>`
+        SELECT status FROM messages WHERE id = ${assistantId}
+      `;
+      const status = row?.status ?? 'failed';
+      if (status !== 'streaming') return status;
+
+      await sleep(COMPLETION_POLL_MS);
+    }
+  }
+
+  function sleep(ms: number): Promise<void> {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+  }
+
+  return {
+    start() {
+      log.info('dispatcher: starting poll loop');
+      timer = setInterval(() => {
+        poll().catch((err) => {
+          log.error({ err }, 'dispatcher: poll error');
+        });
+      }, POLL_INTERVAL_MS);
+    },
+
+    async stop() {
+      stopping = true;
+      if (timer) {
+        clearInterval(timer);
+        timer = null;
+      }
+      if (inflightPromise) {
+        log.info('dispatcher: waiting for in-flight task');
+        await inflightPromise;
+      }
+      log.info('dispatcher: stopped');
+    },
+  };
+}

apps/coder/src/services/host-exec.ts

@@ -0,0 +1,66 @@
+/**
+ * Local shell exec on the BooCoder host (replaces deprecated ssh.ts for worktrees).
+ */
+import { spawn } from 'node:child_process';
+
+export interface HostExecResult {
+  exitCode: number;
+  stdout: string;
+  stderr: string;
+}
+
+export async function hostExec(
+  command: string,
+  opts?: { signal?: AbortSignal; timeoutMs?: number },
+): Promise<HostExecResult> {
+  return new Promise<HostExecResult>((resolve, reject) => {
+    const child = spawn('bash', ['-lc', command], {
+      stdio: ['pipe', 'pipe', 'pipe'],
+    });
+
+    let stdout = '';
+    let stderr = '';
+    let killed = false;
+
+    child.stdout!.on('data', (chunk: Buffer) => { stdout += chunk.toString(); });
+    child.stderr!.on('data', (chunk: Buffer) => { stderr += chunk.toString(); });
+
+    const cleanup = () => {
+      if (!killed) {
+        killed = true;
+        child.kill('SIGTERM');
+      }
+    };
+
+    if (opts?.signal) {
+      if (opts.signal.aborted) {
+        cleanup();
+        reject(new Error('host exec aborted before start'));
+        return;
+      }
+      opts.signal.addEventListener('abort', cleanup, { once: true });
+    }
+
+    let timer: ReturnType<typeof setTimeout> | undefined;
+    if (opts?.timeoutMs) {
+      timer = setTimeout(() => {
+        cleanup();
+        reject(new Error(`host exec timed out after ${opts.timeoutMs}ms`));
+      }, opts.timeoutMs);
+    }
+
+    child.on('close', (code) => {
+      if (timer) clearTimeout(timer);
+      if (opts?.signal) opts.signal.removeEventListener('abort', cleanup);
+      resolve({ exitCode: code ?? 1, stdout, stderr });
+    });
+
+    child.on('error', (err) => {
+      if (timer) clearTimeout(timer);
+      if (opts?.signal) opts.signal.removeEventListener('abort', cleanup);
+      reject(err);
+    });
+
+    child.stdin!.end();
+  });
+}

apps/coder/src/services/mcp-server.ts

@@ -0,0 +1,232 @@
+/**
+ * BooCoder MCP Server — exposes task primitives as MCP tools.
+ *
+ * Started when `--mcp` flag is passed to the entry point. Runs stdio transport
+ * so external tools (opencode in Termius) can drive the task queue.
+ */
+import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
+import { z } from 'zod';
+import type { Sql } from '../db.js';
+import { applyOne, rejectOne } from './pending_changes.js';
+
+// --- Tool handlers -----------------------------------------------------------
+
+interface TaskRow {
+  id: string;
+  state: string;
+}
+
+interface PendingRow {
+  id: string;
+  file_path: string;
+  operation: string;
+  diff: string;
+  session_id: string;
+}
+
+interface WorktreeRow {
+  id: string;
+  worktree_path: string;
+  agent: string;
+  started_at: string;
+}
+
+interface ProjectPathRow {
+  path: string;
+}
+
+function textResult(data: unknown) {
+  return { content: [{ type: 'text' as const, text: JSON.stringify(data, null, 2) }] };
+}
+
+// --- Public entry ------------------------------------------------------------
+
+export async function startMcpServer(sql: Sql): Promise<void> {
+  const server = new McpServer(
+    { name: 'boocoder', version: '2.0.2' },
+    { capabilities: { tools: {} } },
+  );
+
+  // 1. boocoder.create_task
+  server.tool(
+    'boocoder.create_task',
+    'Create a new task in the BooCoder task queue',
+    {
+      project_id: z.string().describe('Project UUID'),
+      input: z.string().describe('Task description / prompt for the agent'),
+      agent: z.string().optional().describe('Agent name (optional — uses default if omitted)'),
+      model: z.string().optional().describe('Model override (optional)'),
+      mode_id: z.string().optional().describe('Permission/mode id (optional)'),
+      thinking_option_id: z.string().optional().describe('Thinking/effort option id (optional)'),
+    },
+    async (args) => {
+      const [row] = await sql<TaskRow[]>`
+        INSERT INTO tasks (project_id, input, agent, model, mode_id, thinking_option_id, state)
+        VALUES (
+          ${args.project_id},
+          ${args.input},
+          ${args.agent ?? null},
+          ${args.model ?? null},
+          ${args.mode_id ?? null},
+          ${args.thinking_option_id ?? null},
+          'pending'
+        )
+        RETURNING id, state
+      `;
+      return textResult({
+        task_id: row!.id,
+        state: row!.state,
+        mode_id: args.mode_id ?? null,
+        thinking_option_id: args.thinking_option_id ?? null,
+      });
+    },
+  );
+
+  // 2. boocoder.list_pending_changes
+  server.tool(
+    'boocoder.list_pending_changes',
+    'List pending changes awaiting review',
+    {
+      session_id: z.string().optional().describe('Optional session filter'),
+    },
+    async (args) => {
+      let rows: PendingRow[];
+      if (args.session_id) {
+        rows = await sql<PendingRow[]>`
+          SELECT id, file_path, operation, diff, session_id
+          FROM pending_changes
+          WHERE status = 'pending' AND session_id = ${args.session_id}
+          ORDER BY created_at ASC
+        `;
+      } else {
+        rows = await sql<PendingRow[]>`
+          SELECT id, file_path, operation, diff, session_id
+          FROM pending_changes
+          WHERE status = 'pending'
+          ORDER BY created_at ASC
+        `;
+      }
+      const items = rows.map((r) => ({
+        id: r.id,
+        file_path: r.file_path,
+        operation: r.operation,
+        diff_preview: r.diff.slice(0, 200),
+      }));
+      return textResult(items);
+    },
+  );
+
+  // 3. boocoder.apply
+  server.tool(
+    'boocoder.apply',
+    'Apply a pending change (write to disk)',
+    {
+      change_id: z.string().describe('Pending change UUID'),
+    },
+    async (args) => {
+      // Resolve projectRoot from the change's session → project path
+      const [proj] = await sql<ProjectPathRow[]>`
+        SELECT p.path FROM pending_changes pc
+        JOIN sessions s ON pc.session_id = s.id
+        JOIN projects p ON s.project_id = p.id
+        WHERE pc.id = ${args.change_id}
+      `;
+      if (!proj) {
+        return textResult({ success: false, file_path: '', error: 'change not found or project path unresolved' });
+      }
+      const result = await applyOne(sql, args.change_id, proj.path);
+      return textResult({ success: result.success, file_path: result.file_path, error: result.error });
+    },
+  );
+
+  // 4. boocoder.reject
+  server.tool(
+    'boocoder.reject',
+    'Reject a pending change (mark as rejected, no disk write)',
+    {
+      change_id: z.string().describe('Pending change UUID'),
+    },
+    async (args) => {
+      await rejectOne(sql, args.change_id);
+      return textResult({ success: true });
+    },
+  );
+
+  // 5. boocoder.dispatch_external_agent
+  server.tool(
+    'boocoder.dispatch_external_agent',
+    'Create a task targeting a specific external agent (ACP or PTY dispatch)',
+    {
+      project_id: z.string().describe('Project UUID'),
+      input: z.string().describe('Task prompt'),
+      agent: z.string().describe('Agent name (must match available_agents registry)'),
+      model: z.string().optional().describe('Model override (optional)'),
+      mode_id: z.string().optional().describe('Permission/mode id (optional)'),
+      thinking_option_id: z.string().optional().describe('Thinking/effort option id (optional)'),
+    },
+    async (args) => {
+      const [row] = await sql<TaskRow[]>`
+        INSERT INTO tasks (project_id, input, agent, model, mode_id, thinking_option_id, state)
+        VALUES (
+          ${args.project_id},
+          ${args.input},
+          ${args.agent},
+          ${args.model ?? null},
+          ${args.mode_id ?? null},
+          ${args.thinking_option_id ?? null},
+          'pending'
+        )
+        RETURNING id, state
+      `;
+
+      // Determine execution path from available_agents
+      const [agentRow] = await sql<{ supports_acp: boolean }[]>`
+        SELECT supports_acp FROM available_agents WHERE name = ${args.agent}
+      `;
+      const executionPath = agentRow?.supports_acp ? 'acp' : 'pty';
+
+      return textResult({
+        task_id: row!.id,
+        state: row!.state,
+        execution_path: executionPath,
+        mode_id: args.mode_id ?? null,
+        thinking_option_id: args.thinking_option_id ?? null,
+      });
+    },
+  );
+
+  // 6. boocoder.list_worktrees
+  server.tool(
+    'boocoder.list_worktrees',
+    'List active worktrees from running tasks',
+    {},
+    async () => {
+      const rows = await sql<WorktreeRow[]>`
+        SELECT id, worktree_path, agent, started_at
+        FROM tasks
+        WHERE worktree_path IS NOT NULL AND state = 'running'
+        ORDER BY started_at DESC
+      `;
+      const items = rows.map((r) => ({
+        task_id: r.id,
+        worktree_path: r.worktree_path,
+        agent: r.agent,
+        started_at: r.started_at,
+      }));
+      return textResult(items);
+    },
+  );
+
+  // Connect via stdio
+  const transport = new StdioServerTransport();
+  await server.connect(transport);
+
+  // Block until stdin closes (transport handles lifecycle)
+  await new Promise<void>((resolve) => {
+    process.stdin.on('end', resolve);
+    process.stdin.on('close', resolve);
+  });
+
+  await sql.end({ timeout: 5 });
+}

apps/coder/src/services/permission-waiter.ts

@@ -0,0 +1,113 @@
+/**
+ * Blocks ACP dispatch on permission prompts until the user responds via API.
+ */
+import type { RequestPermissionRequest, RequestPermissionResponse } from '@agentclientprotocol/sdk';
+import { isUnattendedMode } from './provider-manifest.js';
+
+const DEFAULT_TIMEOUT_MS = 120_000;
+
+interface PendingPermission {
+  request: RequestPermissionRequest;
+  sessionId: string;
+  resolve: (response: RequestPermissionResponse) => void;
+  reject: (err: Error) => void;
+  timer: ReturnType<typeof setTimeout>;
+}
+
+const pendingByTask = new Map<string, PendingPermission>();
+
+export interface PermissionPrompt {
+  taskId: string;
+  toolTitle?: string;
+  options: Array<{ optionId: string; label: string }>;
+}
+
+export interface PermissionHooks {
+  onPrompt?: (prompt: PermissionPrompt & { sessionId: string }) => void | Promise<void>;
+  onResolved?: (taskId: string, sessionId: string) => void | Promise<void>;
+}
+
+let hooks: PermissionHooks = {};
+
+export function setPermissionHooks(next: PermissionHooks): void {
+  hooks = next;
+}
+
+function toPrompt(taskId: string, params: RequestPermissionRequest): PermissionPrompt {
+  return {
+    taskId,
+    toolTitle: params.toolCall?.title ?? undefined,
+    options: params.options.map((o) => ({
+      optionId: o.optionId,
+      label: o.name,
+    })),
+  };
+}
+
+export function waitForPermissionResponse(
+  taskId: string,
+  sessionId: string,
+  provider: string,
+  modeId: string | undefined,
+  params: RequestPermissionRequest,
+  timeoutMs = DEFAULT_TIMEOUT_MS,
+): Promise<RequestPermissionResponse> {
+  if (isUnattendedMode(provider, modeId)) {
+    const first = params.options[0];
+    if (first) {
+      return Promise.resolve({ outcome: { outcome: 'selected', optionId: first.optionId } });
+    }
+    return Promise.resolve({ outcome: { outcome: 'cancelled' } });
+  }
+
+  return new Promise((resolve, reject) => {
+    const existing = pendingByTask.get(taskId);
+    if (existing) {
+      clearTimeout(existing.timer);
+      existing.reject(new Error('superseded by newer permission request'));
+    }
+
+    const timer = setTimeout(() => {
+      pendingByTask.delete(taskId);
+      void hooks.onResolved?.(taskId, sessionId);
+      resolve({ outcome: { outcome: 'cancelled' } });
+    }, timeoutMs);
+
+    pendingByTask.set(taskId, { request: params, sessionId, resolve, reject, timer });
+
+    const prompt = toPrompt(taskId, params);
+    void hooks.onPrompt?.({ ...prompt, sessionId });
+  });
+}
+
+export function respondToPermission(taskId: string, optionId: string | null): boolean {
+  const pending = pendingByTask.get(taskId);
+  if (!pending) return false;
+
+  clearTimeout(pending.timer);
+  pendingByTask.delete(taskId);
+
+  if (optionId) {
+    pending.resolve({ outcome: { outcome: 'selected', optionId } });
+  } else {
+    pending.resolve({ outcome: { outcome: 'cancelled' } });
+  }
+
+  void hooks.onResolved?.(taskId, pending.sessionId);
+  return true;
+}
+
+export function getPendingPermission(taskId: string): PermissionPrompt | null {
+  const pending = pendingByTask.get(taskId);
+  if (!pending) return null;
+  return toPrompt(taskId, pending.request);
+}
+
+export function cancelPendingPermission(taskId: string): void {
+  const pending = pendingByTask.get(taskId);
+  if (!pending) return;
+  clearTimeout(pending.timer);
+  pendingByTask.delete(taskId);
+  pending.resolve({ outcome: { outcome: 'cancelled' } });
+  void hooks.onResolved?.(taskId, pending.sessionId);
+}

apps/coder/src/services/provider-commands.ts

@@ -0,0 +1,84 @@
+/**
+ * Static slash-command hints per harness (interactive TUI / agent session).
+ * Live ACP `available_commands_update` merges on top during dispatch.
+ */
+import type { AgentCommand } from './provider-types.js';
+
+const CLAUDE_COMMANDS: AgentCommand[] = [
+  { name: 'help', description: 'Show available slash commands' },
+  { name: 'clear', description: 'Clear conversation history' },
+  { name: 'compact', description: 'Compact context window' },
+  { name: 'cost', description: 'Show session cost' },
+  { name: 'memory', description: 'Manage project memory' },
+  { name: 'model', description: 'Switch model' },
+  { name: 'permissions', description: 'View or change permission mode' },
+  { name: 'review', description: 'Review current changes' },
+  { name: 'status', description: 'Show session status' },
+  { name: 'vim', description: 'Toggle vim-style input' },
+];
+
+const OPENCODE_COMMANDS: AgentCommand[] = [
+  { name: 'help', description: 'Show available commands' },
+  { name: 'new', description: 'Start a new session' },
+  { name: 'models', description: 'List or switch models' },
+  { name: 'agents', description: 'List or switch agents' },
+  { name: 'compact', description: 'Compact context' },
+  { name: 'share', description: 'Share session' },
+  { name: 'export', description: 'Export session' },
+];
+
+const CURSOR_COMMANDS: AgentCommand[] = [
+  { name: 'help', description: 'Show available slash commands' },
+  { name: 'clear', description: 'Clear conversation' },
+  { name: 'compact', description: 'Compact context' },
+  { name: 'resume', description: 'Resume a prior session' },
+];
+
+const GOOSE_COMMANDS: AgentCommand[] = [
+  { name: 'help', description: 'Show available commands' },
+  { name: 'clear', description: 'Clear conversation' },
+  { name: 'compact', description: 'Compact context' },
+  { name: 'exit', description: 'Exit session' },
+];
+
+const QWEN_COMMANDS: AgentCommand[] = [
+  { name: 'help', description: 'Show available slash commands' },
+  { name: 'clear', description: 'Clear conversation' },
+  { name: 'memory', description: 'Manage memory' },
+  { name: 'hooks', description: 'Manage hooks' },
+  { name: 'review', description: 'Review changes' },
+];
+
+const COPILOT_COMMANDS: AgentCommand[] = [
+  { name: 'help', description: 'Show available commands' },
+  { name: 'explain', description: 'Explain selected code' },
+  { name: 'fix', description: 'Fix issues in context' },
+  { name: 'tests', description: 'Generate or run tests' },
+  { name: 'doc', description: 'Generate documentation' },
+  { name: 'clear', description: 'Clear conversation' },
+];
+
+/** boocode harness uses /api/skills — merged on the frontend. */
+export const PROVIDER_COMMANDS: Record<string, AgentCommand[]> = {
+  claude: CLAUDE_COMMANDS,
+  opencode: OPENCODE_COMMANDS,
+  cursor: CURSOR_COMMANDS,
+  goose: GOOSE_COMMANDS,
+  qwen: QWEN_COMMANDS,
+  copilot: COPILOT_COMMANDS,
+  boocode: [],
+};
+
+export function getManifestCommands(provider: string): AgentCommand[] {
+  return PROVIDER_COMMANDS[provider] ?? [];
+}
+
+export function mergeCommands(...lists: AgentCommand[][]): AgentCommand[] {
+  const byName = new Map<string, AgentCommand>();
+  for (const list of lists) {
+    for (const cmd of list) {
+      byName.set(cmd.name, cmd);
+    }
+  }
+  return [...byName.values()].sort((a, b) => a.name.localeCompare(b.name));
+}

apps/coder/src/services/provider-manifest.ts

@@ -0,0 +1,108 @@
+/**
+ * Static provider mode metadata — lifted from Paseo provider-manifest.ts patterns.
+ */
+import type { ProviderMode } from './provider-types.js';
+
+export interface ProviderManifestEntry {
+  defaultModeId: string | null;
+  modes: ProviderMode[];
+  /** Claude effort levels exposed as thinking options on models. */
+  thinkingOptions?: Array<{ id: string; label: string }>;
+}
+
+const CLAUDE_MODES: ProviderMode[] = [
+  { id: 'default', label: 'Always Ask', description: 'Prompts for permission the first time a tool is used' },
+  { id: 'auto', label: 'Auto mode', description: 'Model classifier reviews permission prompts automatically' },
+  { id: 'acceptEdits', label: 'Accept File Edits', description: 'Automatically approves edit-focused tools' },
+  { id: 'plan', label: 'Plan Mode', description: 'Analyze without executing tools or edits' },
+  { id: 'bypassPermissions', label: 'Bypass', description: 'Skip all permission prompts', isUnattended: true },
+];
+
+const OPENCODE_MODES: ProviderMode[] = [
+  { id: 'build', label: 'Build', description: 'Allows edits and tool execution' },
+  { id: 'plan', label: 'Plan', description: 'Read-only planning mode' },
+  { id: 'full-access', label: 'Full Access', description: 'Auto-approves all tool prompts', isUnattended: true },
+];
+
+const COPILOT_MODES: ProviderMode[] = [
+  {
+    id: 'https://agentclientprotocol.com/protocol/session-modes#agent',
+    label: 'Agent',
+    description: 'Default agent mode',
+  },
+  {
+    id: 'https://agentclientprotocol.com/protocol/session-modes#plan',
+    label: 'Plan',
+    description: 'Plan mode for multi-step work',
+  },
+  {
+    id: 'allow-all',
+    label: 'Allow All',
+    description: 'Automatically approves all tool, path, and URL requests',
+    isUnattended: true,
+  },
+];
+
+const CURSOR_CLI_MODES: ProviderMode[] = [
+  { id: 'agent', label: 'Agent', description: 'Full agent capabilities with tool access' },
+  { id: 'plan', label: 'Plan', description: 'Read-only planning mode' },
+  { id: 'ask', label: 'Ask', description: 'Q&A read-only mode' },
+];
+
+const QWEN_PTY_MODES: ProviderMode[] = [
+  { id: 'default', label: 'Default', description: 'Prompt for approval' },
+  { id: 'plan', label: 'Plan', description: 'Plan only — no edits' },
+  { id: 'auto-edit', label: 'Auto Edit', description: 'Auto-approve edit tools' },
+  { id: 'auto', label: 'Auto', description: 'LLM classifier auto-approves safe actions' },
+  { id: 'yolo', label: 'YOLO', description: 'Auto-approve all tools', isUnattended: true },
+];
+
+const CLAUDE_THINKING = [
+  { id: 'low', label: 'Low' },
+  { id: 'medium', label: 'Medium' },
+  { id: 'high', label: 'High' },
+  { id: 'xhigh', label: 'Extra High' },
+  { id: 'max', label: 'Max' },
+];
+
+export const PROVIDER_MANIFEST: Record<string, ProviderManifestEntry> = {
+  claude: {
+    defaultModeId: 'default',
+    modes: CLAUDE_MODES,
+    thinkingOptions: CLAUDE_THINKING,
+  },
+  opencode: {
+    defaultModeId: 'build',
+    modes: OPENCODE_MODES,
+  },
+  copilot: {
+    defaultModeId: 'https://agentclientprotocol.com/protocol/session-modes#agent',
+    modes: COPILOT_MODES,
+  },
+  cursor: {
+    defaultModeId: 'agent',
+    modes: CURSOR_CLI_MODES,
+  },
+  goose: {
+    defaultModeId: null,
+    modes: [],
+  },
+  qwen: {
+    defaultModeId: 'default',
+    modes: QWEN_PTY_MODES,
+  },
+};
+
+export function getManifestModes(provider: string): ProviderMode[] {
+  return PROVIDER_MANIFEST[provider]?.modes ?? [];
+}
+
+export function getManifestDefaultModeId(provider: string): string | null {
+  return PROVIDER_MANIFEST[provider]?.defaultModeId ?? null;
+}
+
+export function isUnattendedMode(provider: string, modeId: string | undefined): boolean {
+  if (!modeId) return false;
+  const modes = getManifestModes(provider);
+  return modes.some((m) => m.id === modeId && m.isUnattended);
+}

apps/coder/src/services/provider-registry.ts

@@ -0,0 +1,73 @@
+export interface ProviderDef {
+  name: string;
+  label: string;
+  transport: 'native' | 'acp' | 'pty';
+  modelSource: 'llama-swap' | 'static' | 'probe';
+  staticModels?: Array<{ id: string; label: string }>;
+  /** Merge llama-swap models into probed list (OpenCode). */
+  mergeLlamaSwap?: boolean;
+}
+
+/**
+ * Model discovery rules (see provider-snapshot.ts):
+ * - boocode: llama-swap only
+ * - opencode: ACP probe + mergeLlamaSwap (prefixed llama-swap/* ids)
+ * - qwen: ACP probe + merge ~/.qwen/settings.json; PTY fallback reads settings only
+ * - cursor: ACP probe + cursor-agent models CLI fallback
+ * - goose / copilot: ACP probe only
+ * - claude: static manifest models + thinking options
+ */
+export const PROVIDERS: ProviderDef[] = [
+  {
+    name: 'boocode',
+    label: 'BooCoder',
+    transport: 'native',
+    modelSource: 'llama-swap',
+  },
+  {
+    name: 'cursor',
+    label: 'Cursor Agent',
+    transport: 'acp',
+    modelSource: 'probe',
+  },
+  {
+    name: 'opencode',
+    label: 'OpenCode',
+    transport: 'acp',
+    modelSource: 'probe',
+    mergeLlamaSwap: true,
+  },
+  {
+    name: 'goose',
+    label: 'Goose',
+    transport: 'acp',
+    modelSource: 'probe',
+  },
+  {
+    name: 'claude',
+    label: 'Claude Code',
+    transport: 'pty',
+    modelSource: 'static',
+    staticModels: [
+      { id: 'claude-opus-4-20250514', label: 'Opus 4' },
+      { id: 'claude-sonnet-4-20250514', label: 'Sonnet 4' },
+    ],
+  },
+  {
+    name: 'qwen',
+    label: 'Qwen Code',
+    transport: 'acp',
+    modelSource: 'probe',
+  },
+  {
+    name: 'copilot',
+    label: 'GitHub Copilot',
+    transport: 'acp',
+    modelSource: 'probe',
+  },
+];
+
+export const PROVIDERS_BY_NAME = new Map(PROVIDERS.map((p) => [p.name, p]));
+
+/** External agents probed on host (excludes native boocode). */
+export const PROBED_AGENT_NAMES = PROVIDERS.filter((p) => p.name !== 'boocode').map((p) => p.name);

apps/coder/src/services/provider-snapshot.ts

@@ -0,0 +1,266 @@
+/**
+ * Provider snapshot cache — cold ACP probe per provider + static manifest merge.
+ */
+import { homedir } from 'node:os';
+import { exec as execCb } from 'node:child_process';
+import { promisify } from 'node:util';
+import type { FastifyBaseLogger } from 'fastify';
+import type { Sql } from '../db.js';
+import type { Config } from '../config.js';
+import { PROVIDERS, type ProviderDef } from './provider-registry.js';
+import {
+  getManifestDefaultModeId,
+  getManifestModes,
+  PROVIDER_MANIFEST,
+} from './provider-manifest.js';
+import { probeAcpProvider } from './acp-probe.js';
+import { parseCursorAgentModelsOutput } from './cursor-models.js';
+import type { ProviderModel, ProviderSnapshotEntry } from './provider-types.js';
+import { getManifestCommands, mergeCommands } from './provider-commands.js';
+import { readQwenSettingsModels } from './qwen-settings.js';
+
+const exec = promisify(execCb);
+
+interface AgentRow {
+  name: string;
+  install_path: string | null;
+  supports_acp: boolean;
+  models: ProviderModel[] | null;
+  label: string | null;
+  transport: string | null;
+}
+
+async function fetchLlamaSwapModels(config: Config): Promise<ProviderModel[]> {
+  try {
+    const res = await fetch(`${config.LLAMA_SWAP_URL}/v1/models`);
+    if (!res.ok) return [];
+    const parsed = (await res.json()) as { data?: Array<{ id: string }> };
+    return (parsed.data ?? []).map((m) => ({ id: m.id, label: m.id }));
+  } catch {
+    return [];
+  }
+}
+
+async function fetchCursorModelsCli(installPath: string): Promise<ProviderModel[]> {
+  try {
+    const { stdout } = await exec(`"${installPath}" models`, { timeout: 15_000, maxBuffer: 1024 * 1024 });
+    return parseCursorAgentModelsOutput(stdout);
+  } catch {
+    return [];
+  }
+}
+
+/** Prefix llama-swap model ids so they don't collide with provider-native models. */
+export function prefixLlamaSwapModels(models: ProviderModel[]): ProviderModel[] {
+  return models.map((m) => ({
+    ...m,
+    id: m.id.startsWith('llama-swap/') ? m.id : `llama-swap/${m.id}`,
+  }));
+}
+
+function attachClaudeThinking(models: ProviderModel[]): ProviderModel[] {
+  const thinking = PROVIDER_MANIFEST.claude?.thinkingOptions;
+  if (!thinking?.length) return models;
+  return models.map((m) => ({
+    ...m,
+    thinkingOptions: thinking,
+    defaultThinkingOptionId: 'medium',
+  }));
+}
+
+export function mergeModels(...lists: ProviderModel[][]): ProviderModel[] {
+  const seen = new Set<string>();
+  const out: ProviderModel[] = [];
+  for (const list of lists) {
+    for (const m of list) {
+      if (seen.has(m.id)) continue;
+      seen.add(m.id);
+      out.push(m);
+    }
+  }
+  return out;
+}
+
+async function buildProviderEntry(
+  provider: ProviderDef,
+  agentRow: AgentRow | undefined,
+  llamaModels: ProviderModel[],
+  cwd: string,
+): Promise<ProviderSnapshotEntry | null> {
+  const isNative = provider.name === 'boocode';
+  const installed = isNative || !!agentRow;
+  if (!installed) return null;
+
+  let transport = provider.transport;
+  if (agentRow && provider.transport === 'acp' && !agentRow.supports_acp) {
+    transport = 'pty';
+  }
+
+  const fallbackModes = getManifestModes(provider.name);
+  const defaultModeId = getManifestDefaultModeId(provider.name);
+
+  if (isNative) {
+    return {
+      name: provider.name,
+      label: provider.label,
+      transport,
+      status: 'ready',
+      installed: true,
+      models: llamaModels,
+      modes: [],
+      defaultModeId: null,
+      commands: getManifestCommands(provider.name),
+    };
+  }
+
+  let models: ProviderModel[] = [];
+  if (provider.modelSource === 'llama-swap' && provider.mergeLlamaSwap) {
+    models = llamaModels;
+  } else if (agentRow?.models?.length) {
+    models = agentRow.models;
+  } else if (provider.staticModels) {
+    models = provider.staticModels.map((m) => ({ id: m.id, label: m.label }));
+  }
+
+  if (provider.name === 'claude') {
+    models = attachClaudeThinking(models);
+    return {
+      name: provider.name,
+      label: agentRow?.label ?? provider.label,
+      transport,
+      status: 'ready',
+      installed: true,
+      models,
+      modes: fallbackModes,
+      defaultModeId,
+      commands: getManifestCommands(provider.name),
+    };
+  }
+
+  if (transport === 'acp' && agentRow?.install_path && agentRow.supports_acp) {
+    const probe = await probeAcpProvider(provider.name, agentRow.install_path, cwd);
+    if (probe.models.length > 0) {
+      models = probe.models;
+    } else if (provider.name === 'cursor' && agentRow.install_path) {
+      models = await fetchCursorModelsCli(agentRow.install_path);
+    } else if (provider.modelSource === 'llama-swap') {
+      models = llamaModels;
+    }
+
+    if (provider.name === 'qwen') {
+      const settingsModels = await readQwenSettingsModels();
+      models = mergeModels(models, settingsModels);
+    }
+
+    if (provider.mergeLlamaSwap && provider.modelSource !== 'llama-swap') {
+      const nativeModels = probe.models.length > 0 ? probe.models : models;
+      models = mergeModels(nativeModels, prefixLlamaSwapModels(llamaModels));
+    }
+
+    return {
+      name: provider.name,
+      label: agentRow.label ?? provider.label,
+      transport,
+      status: probe.ok ? 'ready' : 'error',
+      installed: true,
+      models,
+      modes: probe.modes.length > 0 ? probe.modes : fallbackModes,
+      defaultModeId: probe.defaultModeId ?? defaultModeId,
+      commands: mergeCommands(getManifestCommands(provider.name), probe.commands),
+      error: probe.error,
+    };
+  }
+
+  // PTY-only providers (qwen fallback when ACP unavailable)
+  if (provider.name === 'qwen') {
+    if (models.length === 0) {
+      models = await readQwenSettingsModels();
+    }
+  }
+
+  return {
+    name: provider.name,
+    label: agentRow?.label ?? provider.label,
+    transport,
+    status: 'ready',
+    installed: true,
+    models,
+    modes: fallbackModes,
+    defaultModeId,
+    commands: getManifestCommands(provider.name),
+  };
+}
+
+const snapshotCache = new Map<string, { at: number; entries: ProviderSnapshotEntry[] }>();
+const snapshotInflight = new Map<string, Promise<ProviderSnapshotEntry[]>>();
+const CACHE_TTL_MS = 5 * 60_000;
+
+export async function getProviderSnapshot(
+  sql: Sql,
+  config: Config,
+  cwd?: string,
+  force = false,
+): Promise<ProviderSnapshotEntry[]> {
+  const resolvedCwd = cwd?.trim() || homedir();
+  const cacheKey = resolvedCwd;
+  const cached = snapshotCache.get(cacheKey);
+  if (!force && cached && Date.now() - cached.at < CACHE_TTL_MS) {
+    return cached.entries;
+  }
+
+  const inflight = snapshotInflight.get(cacheKey);
+  if (!force && inflight) {
+    return inflight;
+  }
+
+  const build = async (): Promise<ProviderSnapshotEntry[]> => {
+    const llamaModels = await fetchLlamaSwapModels(config);
+    const agents = await sql<AgentRow[]>`
+      SELECT name, install_path, supports_acp, models, label, transport FROM available_agents
+    `;
+    const agentMap = new Map(agents.map((a) => [a.name, a]));
+
+    const built = await Promise.all(
+      PROVIDERS.map((provider) =>
+        buildProviderEntry(provider, agentMap.get(provider.name), llamaModels, resolvedCwd),
+      ),
+    );
+    const entries = built.filter((entry): entry is ProviderSnapshotEntry => entry !== null);
+
+    snapshotCache.set(cacheKey, { at: Date.now(), entries });
+    return entries;
+  };
+
+  const promise = build().finally(() => {
+    snapshotInflight.delete(cacheKey);
+  });
+  snapshotInflight.set(cacheKey, promise);
+  return promise;
+}
+
+export function clearProviderSnapshotCache(): void {
+  snapshotCache.clear();
+  snapshotInflight.clear();
+}
+
+/** Persist probed model lists back to available_agents for fast legacy reads. */
+export async function persistProbedModels(
+  sql: Sql,
+  entries: ProviderSnapshotEntry[],
+  log: FastifyBaseLogger,
+): Promise<void> {
+  let count = 0;
+  for (const entry of entries) {
+    if (entry.name === 'boocode' || entry.models.length === 0) continue;
+    const flatModels = entry.models.map(({ id, label }) => ({ id, label }));
+    await sql`
+      UPDATE available_agents
+      SET models = ${sql.json(flatModels as never)}, last_probed_at = clock_timestamp()
+      WHERE name = ${entry.name}
+    `;
+    count++;
+  }
+  if (count > 0) {
+    log.info({ count }, 'provider-snapshot: persisted models to available_agents');
+  }
+}

apps/coder/src/services/provider-types.ts

@@ -0,0 +1,51 @@
+/** Shared provider / snapshot types (Paseo-shaped, BooCoder-native). */
+
+export interface ProviderMode {
+  id: string;
+  label: string;
+  description?: string;
+  /** Auto-approve tool permissions when this mode is selected. */
+  isUnattended?: boolean;
+}
+
+export interface ThinkingOption {
+  id: string;
+  label: string;
+  isDefault?: boolean;
+}
+
+export interface ProviderModel {
+  id: string;
+  label: string;
+  description?: string;
+  isDefault?: boolean;
+  thinkingOptions?: ThinkingOption[];
+  defaultThinkingOptionId?: string;
+}
+
+export type ProviderSnapshotStatus = 'ready' | 'error';
+
+export interface AgentCommand {
+  name: string;
+  description?: string;
+}
+
+export interface ProviderSnapshotEntry {
+  name: string;
+  label: string;
+  transport: string;
+  status: ProviderSnapshotStatus;
+  installed: boolean;
+  models: ProviderModel[];
+  modes: ProviderMode[];
+  defaultModeId: string | null;
+  commands: AgentCommand[];
+  error?: string;
+}
+
+export interface AgentSessionConfig {
+  provider: string;
+  model?: string;
+  modeId?: string;
+  thinkingOptionId?: string;
+}

apps/coder/src/services/pty-dispatch.ts

@@ -0,0 +1,137 @@
+/**
+ * PTY dispatch — runs external agents directly on the host.
+ */
+import type { FastifyBaseLogger } from 'fastify';
+import { spawn } from 'node:child_process';
+
+export interface DispatchResult {
+  exitCode: number;
+  stdout: string;
+  stderr: string;
+}
+
+export interface PtyDispatchOpts {
+  agent: string;
+  task: string;
+  worktreePath: string;
+  model?: string;
+  modeId?: string;
+  thinkingOptionId?: string;
+  installPath?: string;
+  signal?: AbortSignal;
+  log: FastifyBaseLogger;
+}
+
+interface PtySpawnSpec {
+  binary: string;
+  args: string[];
+  stdin?: string;
+}
+
+function buildPtySpawnSpec(
+  agent: string,
+  task: string,
+  model?: string,
+  modeId?: string,
+  thinkingOptionId?: string,
+  installPath?: string,
+): PtySpawnSpec | null {
+  const binary = installPath ?? agent;
+
+  switch (agent) {
+    case 'claude': {
+      const args = ['-p'];
+      if (model) args.push('--model', model);
+      if (modeId) args.push('--permission-mode', modeId);
+      if (thinkingOptionId) args.push('--effort', thinkingOptionId);
+      return { binary, args, stdin: task };
+    }
+
+    case 'qwen': {
+      const args = ['-p', task, '--output-format', 'stream-json'];
+      if (model) args.push('--model', model);
+      if (modeId) args.push('--approval-mode', modeId);
+      return { binary, args };
+    }
+
+    case 'opencode':
+      return {
+        binary,
+        args: model ? ['--model', model] : [],
+        stdin: task,
+      };
+
+    case 'goose':
+      return {
+        binary,
+        args: model ? ['run', '--text', task, '--model', model] : ['run', '--text', task],
+      };
+
+    default:
+      return null;
+  }
+}
+
+export async function dispatchViaPty(opts: PtyDispatchOpts): Promise<DispatchResult> {
+  const { agent, task, worktreePath, model, modeId, thinkingOptionId, installPath, signal, log } = opts;
+
+  const cmd = buildPtySpawnSpec(agent, task, model, modeId, thinkingOptionId, installPath);
+  if (!cmd) {
+    return {
+      exitCode: 1,
+      stdout: '',
+      stderr: `Agent '${agent}' is not yet supported for PTY dispatch.`,
+    };
+  }
+
+  log.info({ agent, binary: cmd.binary, worktreePath, modeId }, 'pty-dispatch: starting');
+
+  return new Promise<DispatchResult>((resolve, reject) => {
+    const child = spawn(cmd.binary, cmd.args, {
+      cwd: worktreePath,
+      stdio: ['pipe', 'pipe', 'pipe'],
+      env: { ...process.env },
+    });
+
+    if (cmd.stdin) {
+      child.stdin!.write(cmd.stdin);
+    }
+    child.stdin!.end();
+
+    let stdout = '';
+    let stderr = '';
+    let killed = false;
+
+    child.stdout!.on('data', (chunk: Buffer) => { stdout += chunk.toString(); });
+    child.stderr!.on('data', (chunk: Buffer) => { stderr += chunk.toString(); });
+
+    const cleanup = () => {
+      if (!killed) {
+        killed = true;
+        child.kill('SIGTERM');
+        setTimeout(() => child.kill('SIGKILL'), 5_000);
+      }
+    };
+
+    if (signal) {
+      if (signal.aborted) {
+        cleanup();
+        resolve({ exitCode: 130, stdout: '', stderr: 'Aborted before start' });
+        return;
+      }
+      signal.addEventListener('abort', cleanup, { once: true });
+    }
+
+    child.on('close', (code) => {
+      if (signal) signal.removeEventListener('abort', cleanup);
+      log.info({ agent, exitCode: code }, 'pty-dispatch: completed');
+      resolve({ exitCode: code ?? 1, stdout, stderr });
+    });
+
+    child.on('error', (err) => {
+      if (signal) signal.removeEventListener('abort', cleanup);
+      log.error({ agent, err: err.message }, 'pty-dispatch: spawn error');
+      reject(err);
+    });
+  });
+}

apps/coder/src/services/qwen-settings.ts

@@ -0,0 +1,21 @@
+import { readFile } from 'node:fs/promises';
+import { join } from 'node:path';
+import { homedir } from 'node:os';
+import type { ProviderModel } from './provider-types.js';
+
+const QWEN_SETTINGS_PATH = join(homedir(), '.qwen', 'settings.json');
+
+export async function readQwenSettingsModels(): Promise<ProviderModel[]> {
+  try {
+    const raw = await readFile(QWEN_SETTINGS_PATH, 'utf8');
+    if (!raw.trim()) return [];
+    const settings = JSON.parse(raw) as {
+      modelProviders?: { openai?: Array<{ id: string }> };
+    };
+    const openaiModels = settings?.modelProviders?.openai;
+    if (!Array.isArray(openaiModels)) return [];
+    return openaiModels.map((m) => ({ id: m.id, label: m.id }));
+  } catch {
+    return [];
+  }
+}

apps/coder/src/services/tools/check_task_status.ts

@@ -0,0 +1,50 @@
+import { z } from 'zod';
+import type { ToolDef, ToolContext } from './types.js';
+
+const CheckTaskStatusInput = z.object({
+  task_id: z.string().uuid().describe('ID of the task to check'),
+});
+
+type CheckTaskStatusInputT = z.infer<typeof CheckTaskStatusInput>;
+
+export const checkTaskStatusTool: ToolDef<CheckTaskStatusInputT> = {
+  name: 'check_task_status',
+  description: 'Check the status and output of a subtask by ID. Returns state, output_summary, and timing.',
+  inputSchema: CheckTaskStatusInput,
+  jsonSchema: {
+    type: 'function',
+    function: {
+      name: 'check_task_status',
+      description: 'Check the status and output of a subtask by ID.',
+      parameters: {
+        type: 'object',
+        properties: {
+          task_id: { type: 'string', description: 'ID of the task to check' },
+        },
+        required: ['task_id'],
+      },
+    },
+  },
+
+  async execute(input: CheckTaskStatusInputT, _projectRoot: string, context: ToolContext): Promise<unknown> {
+    const { sql } = context;
+
+    const [task] = await sql<{ id: string; state: string; output_summary: string | null; started_at: string | null; ended_at: string | null }[]>`
+      SELECT id, state, output_summary, started_at, ended_at
+      FROM tasks
+      WHERE id = ${input.task_id}
+    `;
+
+    if (!task) {
+      return { error: `Task ${input.task_id} not found` };
+    }
+
+    return {
+      id: task.id,
+      state: task.state,
+      output_summary: task.output_summary,
+      started_at: task.started_at,
+      ended_at: task.ended_at,
+    };
+  },
+};

apps/coder/src/services/tools/index.ts

@@ -4,6 +4,9 @@ import { createFileTool } from './create_file.js';
 import { deleteFileTool } from './delete_file.js';
 import { applyPendingTool } from './apply_pending.js';
 import { rewindTool } from './rewind.js';
+import { newTaskTool } from './new_task.js';
+import { listTasksTool } from './list_tasks.js';
+import { checkTaskStatusTool } from './check_task_status.js';
 
 export type { ToolDef, ToolContext, ToolJsonSchema } from './types.js';
 
@@ -16,6 +19,11 @@ export const WRITE_TOOLS: readonly ToolDef<any>[] = [
   deleteFileTool,
   editFileTool,
   rewindTool,
+  // Boomerang subtask tools — orchestrator agents call these to spawn/monitor child tasks.
+  // An "Orchestrator" agent profile would whitelist [new_task, list_tasks, check_task_status].
+  newTaskTool,
+  listTasksTool,
+  checkTaskStatusTool,
 ];
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -23,4 +31,4 @@ export const WRITE_TOOLS_BY_NAME: ReadonlyMap<string, ToolDef<any>> = new Map(
   WRITE_TOOLS.map((t) => [t.name, t]),
 );
 
-export { editFileTool, createFileTool, deleteFileTool, applyPendingTool, rewindTool };
+export { editFileTool, createFileTool, deleteFileTool, applyPendingTool, rewindTool, newTaskTool, listTasksTool, checkTaskStatusTool };

apps/coder/src/services/tools/list_tasks.ts

@@ -0,0 +1,56 @@
+import { z } from 'zod';
+import type { ToolDef, ToolContext } from './types.js';
+import { getInferenceContext } from './inference_context.js';
+
+const ListTasksInput = z.object({
+  parent_task_id: z.string().uuid().optional().describe('Filter by parent task ID. Omit to list children of current task.'),
+});
+
+type ListTasksInputT = z.infer<typeof ListTasksInput>;
+
+export const listTasksTool: ToolDef<ListTasksInputT> = {
+  name: 'list_tasks',
+  description: 'List child tasks of the current task (or a specified parent). Returns id, state, input preview, and output_summary.',
+  inputSchema: ListTasksInput,
+  jsonSchema: {
+    type: 'function',
+    function: {
+      name: 'list_tasks',
+      description: 'List child tasks of the current task (or a specified parent).',
+      parameters: {
+        type: 'object',
+        properties: {
+          parent_task_id: { type: 'string', description: 'Filter by parent task ID. Omit to list children of current task.' },
+        },
+        required: [],
+      },
+    },
+  },
+
+  async execute(input: ListTasksInputT, _projectRoot: string, context: ToolContext): Promise<unknown> {
+    const { sql } = context;
+    const ctx = getInferenceContext();
+    const parentId = input.parent_task_id ?? ctx.taskId;
+
+    if (!parentId) {
+      return { tasks: [], note: 'No parent task context — not running inside a task.' };
+    }
+
+    const rows = await sql<{ id: string; state: string; input: string; output_summary: string | null }[]>`
+      SELECT id, state, input, output_summary
+      FROM tasks
+      WHERE parent_task_id = ${parentId}
+      ORDER BY created_at DESC
+      LIMIT 50
+    `;
+
+    return {
+      tasks: rows.map((r) => ({
+        id: r.id,
+        state: r.state,
+        input_preview: r.input.slice(0, 100),
+        output_summary: r.output_summary,
+      })),
+    };
+  },
+};

apps/coder/src/services/tools/new_task.ts

@@ -0,0 +1,65 @@
+import { z } from 'zod';
+import type { ToolDef, ToolContext } from './types.js';
+import { getInferenceContext } from './inference_context.js';
+
+const NewTaskInput = z.object({
+  input: z.string().min(1).describe('Task description for the child subtask'),
+  agent: z.string().optional().describe('Optional: dispatch to a specific agent'),
+  model: z.string().optional().describe('Optional: model override for the subtask'),
+});
+
+type NewTaskInputT = z.infer<typeof NewTaskInput>;
+
+export const newTaskTool: ToolDef<NewTaskInputT> = {
+  name: 'new_task',
+  description:
+    'Spawn a subtask that runs in isolation. The subtask gets its own session and ' +
+    'worktree. Use check_task_status to monitor progress. Only the output_summary is ' +
+    'accessible to the parent — full isolation (Boomerang pattern).',
+  inputSchema: NewTaskInput,
+  jsonSchema: {
+    type: 'function',
+    function: {
+      name: 'new_task',
+      description:
+        'Spawn a subtask that runs in isolation. The subtask gets its own session and ' +
+        'worktree. Use check_task_status to monitor progress.',
+      parameters: {
+        type: 'object',
+        properties: {
+          input: { type: 'string', description: 'Task description for the child subtask' },
+          agent: { type: 'string', description: 'Optional: dispatch to a specific agent' },
+          model: { type: 'string', description: 'Optional: model override for the subtask' },
+        },
+        required: ['input'],
+      },
+    },
+  },
+
+  async execute(input: NewTaskInputT, _projectRoot: string, context: ToolContext): Promise<unknown> {
+    const { sql } = context;
+    // Get the current task's project_id from the inference context
+    const ctx = getInferenceContext();
+    const currentTaskId = ctx.taskId;
+
+    // Look up the project_id from the current session
+    const [session] = await sql<{ project_id: string }[]>`
+      SELECT project_id FROM sessions WHERE id = ${ctx.sessionId}
+    `;
+    if (!session) {
+      return { error: 'Cannot determine project_id from current session' };
+    }
+
+    const [task] = await sql<{ id: string; state: string }[]>`
+      INSERT INTO tasks (project_id, parent_task_id, input, agent, model)
+      VALUES (${session.project_id}, ${currentTaskId}, ${input.input}, ${input.agent ?? null}, ${input.model ?? null})
+      RETURNING id, state
+    `;
+
+    return {
+      message: `Subtask created (id: ${task!.id}). It will run in isolation. Use check_task_status to monitor.`,
+      task_id: task!.id,
+      state: task!.state,
+    };
+  },
+};

apps/coder/src/services/worktrees.ts

@@ -0,0 +1,118 @@
+/**
+ * Git worktree management for external agent dispatch.
+ *
+ * Each dispatched task gets its own git worktree so the external agent
+ * can modify files freely without touching the main working tree.
+ * After the agent completes, we diff the worktree against HEAD and
+ * queue the diff into pending_changes.
+ */
+import { hostExec } from './host-exec.js';
+
+const WORKTREE_BASE = '/tmp/booworktrees';
+
+/**
+ * Create a git worktree for a task on the host.
+ * Returns the absolute path to the worktree directory.
+ */
+export async function createWorktree(
+  projectPath: string,
+  taskId: string,
+  opts?: { signal?: AbortSignal },
+): Promise<string> {
+  const worktreePath = `${WORKTREE_BASE}/${taskId}`;
+  const branchName = `task-${taskId}`;
+
+  // Ensure the base directory exists
+  await hostExec(`mkdir -p ${WORKTREE_BASE}`, { signal: opts?.signal });
+
+  // Create the worktree with a new branch from HEAD
+  const result = await hostExec(
+    `git -C ${shellEscape(projectPath)} worktree add ${shellEscape(worktreePath)} -b ${shellEscape(branchName)} HEAD`,
+    { signal: opts?.signal, timeoutMs: 30_000 },
+  );
+
+  if (result.exitCode !== 0) {
+    throw new Error(`Failed to create worktree: ${result.stderr.trim() || result.stdout.trim()}`);
+  }
+
+  return worktreePath;
+}
+
+/**
+ * Get the unified diff of changes made in the worktree vs the parent branch (HEAD).
+ * Returns an empty string if there are no changes.
+ */
+export async function diffWorktree(
+  worktreePath: string,
+  projectPath: string,
+  opts?: { signal?: AbortSignal },
+): Promise<string> {
+  // First, commit any uncommitted changes in the worktree so we can diff branches
+  // Stage all changes
+  const addResult = await hostExec(
+    `cd ${shellEscape(worktreePath)} && git add -A`,
+    { signal: opts?.signal, timeoutMs: 30_000 },
+  );
+  if (addResult.exitCode !== 0) {
+    throw new Error(`Failed to stage worktree changes: ${addResult.stderr.trim()}`);
+  }
+
+  // Check if there are staged changes
+  const statusResult = await hostExec(
+    `cd ${shellEscape(worktreePath)} && git diff --cached --quiet`,
+    { signal: opts?.signal, timeoutMs: 10_000 },
+  );
+
+  if (statusResult.exitCode === 0) {
+    // No changes
+    return '';
+  }
+
+  // Commit staged changes (needed to produce a clean branch diff)
+  await hostExec(
+    `cd ${shellEscape(worktreePath)} && git -c user.email=boocoder@local -c user.name=BooCoder commit -m "task changes" --allow-empty`,
+    { signal: opts?.signal, timeoutMs: 15_000 },
+  );
+
+  // Diff the worktree branch against the parent commit (HEAD of main tree)
+  const diffResult = await hostExec(
+    `git -C ${shellEscape(projectPath)} diff HEAD...$(git -C ${shellEscape(worktreePath)} rev-parse HEAD)`,
+    { signal: opts?.signal, timeoutMs: 60_000 },
+  );
+
+  if (diffResult.exitCode !== 0) {
+    throw new Error(`Failed to diff worktree: ${diffResult.stderr.trim()}`);
+  }
+
+  return diffResult.stdout;
+}
+
+/**
+ * Remove a worktree and its associated branch.
+ * Best-effort — does not throw on failure (task may have already been cleaned up).
+ */
+export async function cleanupWorktree(
+  projectPath: string,
+  taskId: string,
+): Promise<void> {
+  const worktreePath = `${WORKTREE_BASE}/${taskId}`;
+  const branchName = `task-${taskId}`;
+
+  // Remove the worktree (--force handles dirty state)
+  await hostExec(
+    `git -C ${shellEscape(projectPath)} worktree remove ${shellEscape(worktreePath)} --force`,
+    { timeoutMs: 15_000 },
+  ).catch(() => {});
+
+  // Delete the task branch
+  await hostExec(
+    `git -C ${shellEscape(projectPath)} branch -D ${shellEscape(branchName)}`,
+    { timeoutMs: 10_000 },
+  ).catch(() => {});
+}
+
+/** Minimal shell escape for paths (single-quote wrapping). */
+function shellEscape(s: string): string {
+  // Replace single quotes with escaped version, wrap in single quotes
+  return "'" + s.replace(/'/g, "'\\''") + "'";
+}

apps/coder/src/services/write_guard.ts

@@ -54,10 +54,14 @@ export function isSecretPath(filePath: string): boolean {
  * checks the result stays within projectRoot.
  */
 export function resolveWritePath(projectRoot: string, filePath: string): string {
-  if (!filePath || filePath.length === 0) {
+  if (!filePath || filePath.trim().length === 0) {
     throw new WriteGuardError('file path is required');
   }
 
+  if (filePath.includes('\x00')) {
+    throw new WriteGuardError('file path contains null byte');
+  }
+
   const candidate = filePath.startsWith('/') ? filePath : resolve(projectRoot, filePath);
   const normalized = resolve(candidate); // normalizes ../ segments
 

apps/server/package.json

@@ -19,7 +19,9 @@
     "./types": { "types": "./dist/types/api.d.ts", "default": "./dist/types/api.js" },
     "./ws-frames": { "types": "./dist/types/ws-frames.d.ts", "default": "./dist/types/ws-frames.js" },
     "./db": { "types": "./dist/db.d.ts", "default": "./dist/db.js" },
-    "./config": { "types": "./dist/config.d.ts", "default": "./dist/config.js" }
+    "./config": { "types": "./dist/config.d.ts", "default": "./dist/config.js" },
+    "./skills": { "types": "./dist/services/skills.d.ts", "default": "./dist/services/skills.js" },
+    "./skill-invoke": { "types": "./dist/services/skill-invoke.d.ts", "default": "./dist/services/skill-invoke.js" }
   },
   "scripts": {
     "dev": "tsx watch src/index.ts",

apps/server/src/config.ts

@@ -22,6 +22,9 @@ const ConfigSchema = z.object({
   // v1.15.0-mcp-multi: path to the MCP config JSON file. Default /data/mcp.json
   // (bind-mounted alongside AGENTS.md). File missing = no MCP (opt-in).
   MCP_CONFIG_PATH: z.string().optional(),
+  // v2.0.5: cheaper model for titles, summaries, labeling. Falls back to
+  // session model (auto_name) or DEFAULT_MODEL when unset.
+  FAST_MODEL: z.string().optional(),
 });
 
 export type Config = z.infer<typeof ConfigSchema>;

apps/server/src/index.ts

@@ -14,6 +14,7 @@ import { registerArtifactRoutes } from './routes/artifacts.js';
 import { registerChatRoutes } from './routes/chats.js';
 import { registerSidebarRoutes } from './routes/sidebar.js';
 import { registerWebSocket } from './routes/ws.js';
+import { registerCoderProxy } from './routes/coder-proxy.js';
 import { registerModelRoutes } from './routes/models.js';
 import { registerAgentRoutes } from './routes/agents.js';
 import { registerSkillsRoutes } from './routes/skills.js';
@@ -212,36 +213,10 @@ async function main() {
   });
   registerWebSocket(app, sql, broker);
 
-  // v2.0.0: reverse proxy /api/coder/* to the boocoder container. Keeps the
-  // SPA's HTTP requests going through a single origin (avoids CORS). WS for
-  // the coder pane connects directly to boocoder:9502 from the browser (same
-  // Tailscale network — no CORS issue for WebSocket upgrade requests).
+  // v2.0.0: reverse proxy /api/coder/* to boocoder (HTTP + WS). CoderPane
+  // connects WS through /api/coder/ws/sessions/:id on the same origin.
   const BOOCODER_ORIGIN = process.env.BOOCODER_URL ?? 'http://boocoder:3000';
-  app.all('/api/coder/*', async (req, reply) => {
-    const targetPath = req.url.replace('/api/coder', '/api');
-    const targetUrl = `${BOOCODER_ORIGIN}${targetPath}`;
-    const headers: Record<string, string> = {};
-    if (req.headers['content-type']) headers['content-type'] = req.headers['content-type'] as string;
-    if (req.headers['authorization']) headers['authorization'] = req.headers['authorization'] as string;
-
-    try {
-      const res = await fetch(targetUrl, {
-        method: req.method as string,
-        headers,
-        body: req.method !== 'GET' && req.method !== 'HEAD' ? JSON.stringify(req.body) : undefined,
-      });
-      reply.code(res.status);
-      for (const [key, value] of res.headers) {
-        if (key === 'transfer-encoding') continue;
-        reply.header(key, value);
-      }
-      const body = await res.text();
-      return reply.send(body);
-    } catch (err) {
-      app.log.error({ err, targetUrl }, 'coder proxy error');
-      reply.code(502).send({ error: 'boocoder backend unavailable' });
-    }
-  });
+  registerCoderProxy(app, BOOCODER_ORIGIN);
 
   const webDist = process.env.WEB_DIST_PATH ?? resolve(process.cwd(), '../web/dist');
   if (existsSync(webDist)) {

apps/server/src/routes/coder-proxy.ts

@@ -0,0 +1,91 @@
+import type { FastifyInstance } from 'fastify';
+import WebSocket from 'ws';
+
+function boocoderWsUrl(origin: string, path: string): string {
+  const u = new URL(origin);
+  u.protocol = u.protocol === 'https:' ? 'wss:' : 'ws:';
+  u.pathname = path;
+  u.search = '';
+  return u.toString();
+}
+
+/**
+ * Reverse-proxy BooCoder HTTP + WebSocket through BooChat's single origin.
+ * WS must be registered before the HTTP catch-all — fetch() cannot upgrade.
+ */
+export function registerCoderProxy(app: FastifyInstance, boocoderOrigin: string): void {
+  app.get<{ Params: { sessionId: string } }>(
+    '/api/coder/ws/sessions/:sessionId',
+    { websocket: true },
+    (clientSocket, req) => {
+      const sessionId = req.params.sessionId;
+      const target = boocoderWsUrl(boocoderOrigin, `/api/ws/sessions/${sessionId}`);
+      const upstream = new WebSocket(target);
+
+      upstream.on('open', () => {
+        app.log.debug({ sessionId }, 'coder ws proxy: upstream connected');
+      });
+
+      upstream.on('message', (data, isBinary) => {
+        if (clientSocket.readyState !== clientSocket.OPEN) return;
+        clientSocket.send(data, { binary: isBinary });
+      });
+
+      upstream.on('close', (code, reason) => {
+        if (clientSocket.readyState === clientSocket.OPEN) {
+          clientSocket.close(code, reason.toString());
+        }
+      });
+
+      upstream.on('error', (err) => {
+        app.log.warn({ err, sessionId, target }, 'coder ws proxy: upstream error');
+        if (clientSocket.readyState === clientSocket.OPEN) {
+          clientSocket.close(1011, 'upstream error');
+        }
+      });
+
+      clientSocket.on('message', (data, isBinary) => {
+        if (upstream.readyState !== WebSocket.OPEN) return;
+        upstream.send(data, { binary: isBinary });
+      });
+
+      clientSocket.on('close', () => {
+        if (upstream.readyState === WebSocket.OPEN || upstream.readyState === WebSocket.CONNECTING) {
+          upstream.close();
+        }
+      });
+
+      clientSocket.on('error', () => {
+        if (upstream.readyState === WebSocket.OPEN || upstream.readyState === WebSocket.CONNECTING) {
+          upstream.close();
+        }
+      });
+    },
+  );
+
+  app.all('/api/coder/*', async (req, reply) => {
+    const targetPath = req.url.replace('/api/coder', '/api');
+    const targetUrl = `${boocoderOrigin}${targetPath}`;
+    const headers: Record<string, string> = {};
+    if (req.headers['content-type']) headers['content-type'] = req.headers['content-type'] as string;
+    if (req.headers['authorization']) headers['authorization'] = req.headers['authorization'] as string;
+
+    try {
+      const res = await fetch(targetUrl, {
+        method: req.method as string,
+        headers,
+        body: req.method !== 'GET' && req.method !== 'HEAD' ? JSON.stringify(req.body) : undefined,
+      });
+      reply.code(res.status);
+      for (const [key, value] of res.headers) {
+        if (key === 'transfer-encoding') continue;
+        reply.header(key, value);
+      }
+      const body = await res.text();
+      return reply.send(body);
+    } catch (err) {
+      app.log.error({ err, targetUrl }, 'coder proxy error');
+      reply.code(502).send({ error: 'boocoder backend unavailable' });
+    }
+  });
+}

apps/server/src/routes/sessions.ts

@@ -33,7 +33,8 @@ const WorkspacePaneZ = z.object({
   kind: z.enum([
     'chat',
     'terminal',
-    'agent',
+    'coder',
+    'agent', // legacy alias — normalized to coder on write
     'empty',
     'settings',
     'markdown_artifact',
@@ -307,9 +308,12 @@ export function registerSessionRoutes(
         reply.code(400);
         return { error: 'invalid body', details: parsed.error.flatten() };
       }
+      const workspacePanes = parsed.data.workspace_panes.map((pane) =>
+        pane.kind === 'agent' ? { ...pane, kind: 'coder' as const } : pane,
+      );
       const rows = await sql<Session[]>`
         UPDATE sessions
-        SET workspace_panes = ${sql.json(parsed.data.workspace_panes as never)},
+        SET workspace_panes = ${sql.json(workspacePanes as never)},
             updated_at = clock_timestamp()
         WHERE id = ${req.params.id}
         RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at,

apps/server/src/routes/skills.ts

@@ -1,9 +1,13 @@
-import { randomUUID } from 'node:crypto';
 import type { FastifyInstance } from 'fastify';
 import { z } from 'zod';
 import type { Sql } from '../db.js';
 import type { Chat } from '../types/api.js';
 import { getSkillBody, listSkills } from '../services/skills.js';
+import {
+  buildSkillInvokeSyntheticFrames,
+  DEFAULT_SKILL_USER_MESSAGE,
+  runSkillInvokeTransaction,
+} from '../services/skill-invoke.js';
 
 // Batch 9.6 slash-invoke handlers. Mirrors the MessageHandlers shape in
 // routes/messages.ts so index.ts can pass thin adapters around broker +
@@ -35,8 +39,6 @@ const SkillInvokeBody = z.object({
   user_message: z.string().max(64_000).nullable().optional(),
 });
 
-const DEFAULT_USER_MESSAGE = 'Apply this skill.';
-
 export function registerSkillsRoutes(
   app: FastifyInstance,
   sql: Sql,
@@ -62,7 +64,9 @@ export function registerSkillsRoutes(
         return { error: 'invalid body', details: parsed.error.flatten() };
       }
       const { skill_name } = parsed.data;
-      const userText = parsed.data.user_message?.trim() ? parsed.data.user_message : DEFAULT_USER_MESSAGE;
+      const userText = parsed.data.user_message?.trim()
+        ? parsed.data.user_message
+        : DEFAULT_SKILL_USER_MESSAGE;
 
       const chatRows = await sql<Chat[]>`
         SELECT id, session_id FROM chats WHERE id = ${req.params.id} AND status = 'open'
@@ -80,87 +84,20 @@ export function registerSkillsRoutes(
         return { error: 'unknown_skill', message: `unknown skill: ${skill_name}` };
       }
 
-      const toolCallId = randomUUID();
-      const toolCalls = [{ id: toolCallId, name: 'skill_use', args: { name: skill_name } }];
-      const toolResults = { tool_call_id: toolCallId, output: body, truncated: false };
-
-      const result = await sql.begin(async (tx) => {
-        const [synthAssistant] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
-          VALUES (${sessionId}, ${chat.id}, 'assistant', '', 'complete', clock_timestamp())
-          RETURNING id
-        `;
-        // v1.13.20: parts-only write. Single skill_use tool_call, no text
-        // content, so one part at seq 0.
-        await tx`
-          INSERT INTO message_parts (message_id, sequence, kind, payload)
-          VALUES (${synthAssistant!.id}, 0, 'tool_call', ${tx.json({
-            id: toolCallId,
-            name: 'skill_use',
-            args: { name: skill_name },
-          } as never)})
-        `;
-        const [toolMsg] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
-          VALUES (${sessionId}, ${chat.id}, 'tool', '', 'complete', clock_timestamp())
-          RETURNING id
-        `;
-        // v1.13.20: parts-only write of the synthetic tool result (skill body).
-        await tx`
-          INSERT INTO message_parts (message_id, sequence, kind, payload)
-          VALUES (${toolMsg!.id}, 0, 'tool_result', ${tx.json(toolResults as never)})
-        `;
-        const [userMsg] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
-          VALUES (${sessionId}, ${chat.id}, 'user', ${userText}, 'complete', clock_timestamp())
-          RETURNING id
-        `;
-        const [assistantMsg] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
-          VALUES (${sessionId}, ${chat.id}, 'assistant', '', 'streaming', clock_timestamp())
-          RETURNING id
-        `;
-        await tx`UPDATE sessions SET updated_at = clock_timestamp() WHERE id = ${sessionId}`;
-        await tx`UPDATE chats SET updated_at = clock_timestamp() WHERE id = ${chat.id}`;
-        return {
-          synth_assistant_id: synthAssistant!.id,
-          tool_message_id: toolMsg!.id,
-          user_message_id: userMsg!.id,
-          assistant_message_id: assistantMsg!.id,
-        };
+      const { result, toolCall } = await runSkillInvokeTransaction(sql, {
+        sessionId,
+        chatId: chat.id,
+        skillName: skill_name,
+        skillBody: body,
+        userText,
       });
 
       // Synthetic frames so useSessionStream's reducer reflects the new
       // history without a refetch. Frame shapes match the streaming-inference
       // protocol (see services/inference.ts InferenceFrame).
-      handlers.publishSessionFrame(sessionId, {
-        type: 'message_started',
-        message_id: result.synth_assistant_id,
-        chat_id: chat.id,
-        role: 'assistant',
-      });
-      handlers.publishSessionFrame(sessionId, {
-        type: 'tool_call',
-        message_id: result.synth_assistant_id,
-        chat_id: chat.id,
-        tool_call: toolCalls[0]!,
-      });
-      handlers.publishSessionFrame(sessionId, {
-        type: 'message_complete',
-        message_id: result.synth_assistant_id,
-        chat_id: chat.id,
-      });
-      // The tool_result frame's reducer branch creates the tool-role message
-      // in-place when it doesn't already exist — no separate message_started
-      // is needed for the tool side.
-      handlers.publishSessionFrame(sessionId, {
-        type: 'tool_result',
-        tool_message_id: result.tool_message_id,
-        tool_call_id: toolCallId,
-        chat_id: chat.id,
-        output: body,
-        truncated: false,
-      });
+      for (const frame of buildSkillInvokeSyntheticFrames(chat.id, result, toolCall, body)) {
+        handlers.publishSessionFrame(sessionId, frame);
+      }
       handlers.publishUserMessage(sessionId, chat.id, result.user_message_id, userText);
       handlers.enqueueInference(sessionId, chat.id, result.assistant_message_id, 'default');
 

apps/server/src/services/__tests__/agents.test.ts

@@ -0,0 +1,33 @@
+import { describe, it, expect } from 'vitest';
+import { isAgentRegistryMarkdown, parseAgentsMd } from '../agents.js';
+
+describe('isAgentRegistryMarkdown', () => {
+  it('rejects Cursor navigation AGENTS.md at repo root', () => {
+    expect(
+      isAgentRegistryMarkdown('# Agent navigation\n\n## Doc map\n'),
+    ).toBe(false);
+  });
+
+  it('accepts the global data/AGENTS.md registry shape', () => {
+    expect(isAgentRegistryMarkdown('# Agents\n\n## Code Reviewer\n---\n')).toBe(true);
+  });
+});
+
+describe('parseAgentsMd', () => {
+  it('does not emit errors for navigation sections when file is skipped upstream', () => {
+    // When isAgentRegistryMarkdown returns false, getAgentsForProject never calls this.
+    // Sanity: a nav-shaped file would produce six "missing fence" errors if parsed.
+    const nav = `# Agent navigation
+
+## Doc map
+| Need | Read |
+|------|------|
+
+## Task routing
+Start here
+`;
+    const r = parseAgentsMd(nav);
+    expect(r.agents).toHaveLength(0);
+    expect(r.errors.length).toBeGreaterThan(0);
+  });
+});

apps/server/src/services/__tests__/inference.test.ts

@@ -226,6 +226,76 @@ describe('buildMessagesPayload', async () => {
     expect(result[4]).toMatchObject({ role: 'assistant', content: 'here it is' });
   });
 
+  it('strips assistant tool_calls when matching tool results are missing', async () => {
+    const session = makeSession();
+    const project = makeProject();
+    const toolCall: ToolCall = {
+      id: 'call_orphan',
+      name: 'grep',
+      args: { pattern: 'foo' },
+    };
+    const history: Message[] = [
+      makeMessage('user', 'search'),
+      makeMessage('assistant', 'partial answer', { tool_calls: [toolCall] }),
+      makeMessage('assistant', 'final answer'),
+    ];
+    const result = await buildMessagesPayload(session, project, history);
+    // tool_calls stripped from the orphan turn; text content kept.
+    expect(result).toHaveLength(4);
+    expect(result[1]).toMatchObject({ role: 'user', content: 'search' });
+    expect(result[2]).toMatchObject({ role: 'assistant', content: 'partial answer' });
+    expect(result[2]!.tool_calls).toBeUndefined();
+    expect(result[3]).toMatchObject({ role: 'assistant', content: 'final answer' });
+  });
+
+  it('drops tool-call-only assistant rows when tool results never arrived', async () => {
+    const session = makeSession();
+    const project = makeProject();
+    const toolCall: ToolCall = {
+      id: 'call_orphan_only',
+      name: 'grep',
+      args: { pattern: 'foo' },
+    };
+    const history: Message[] = [
+      makeMessage('user', 'search'),
+      makeMessage('assistant', '', { tool_calls: [toolCall] }),
+      makeMessage('assistant', 'final answer'),
+    ];
+    const result = await buildMessagesPayload(session, project, history);
+    expect(result).toHaveLength(3);
+    expect(result[2]).toMatchObject({ role: 'assistant', content: 'final answer' });
+  });
+
+  it('skips stray tool rows when the owning assistant tool_calls were stripped', async () => {
+    const session = makeSession();
+    const project = makeProject();
+    const toolCallA: ToolCall = {
+      id: 'call_a',
+      name: 'grep',
+      args: { pattern: 'foo' },
+    };
+    const toolCallB: ToolCall = {
+      id: 'call_b',
+      name: 'read',
+      args: { path: 'x' },
+    };
+    const toolResult: ToolResult = {
+      tool_call_id: 'call_a',
+      output: 'match',
+      truncated: false,
+    };
+    const history: Message[] = [
+      makeMessage('user', 'search'),
+      makeMessage('assistant', '', { tool_calls: [toolCallA, toolCallB] }),
+      makeMessage('tool', '', { tool_results: toolResult }),
+      makeMessage('assistant', 'final answer'),
+    ];
+    const result = await buildMessagesPayload(session, project, history);
+    expect(result).toHaveLength(3);
+    expect(result.find((m) => m.role === 'tool')).toBeUndefined();
+    expect(result[2]).toMatchObject({ role: 'assistant', content: 'final answer' });
+  });
+
   it('skips tool rows with no tool_results', async () => {
     const session = makeSession();
     const project = makeProject();

apps/server/src/services/agents.ts

@@ -309,6 +309,14 @@ export function parseAgentsMd(content: string): ParseResult {
   return { agents, errors };
 }
 
+/** True when a file at `<project>/AGENTS.md` is an agent registry, not Cursor/doc nav. */
+export function isAgentRegistryMarkdown(content: string): boolean {
+  const firstLine = content.trimStart().split('\n')[0]?.trim() ?? '';
+  // BooCode monorepo root AGENTS.md is navigation only; registry is /data/AGENTS.md.
+  if (firstLine === '# Agent navigation') return false;
+  return true;
+}
+
 // ---- mtime-keyed cache + public API ----------------------------------------
 
 interface CacheEntry {
@@ -397,7 +405,7 @@ export async function getAgentsForProject(projectPath: string): Promise<AgentsRe
     for (const a of r.agents) byName.set(a.name, { ...a, source: 'global' });
     errors.push(...r.errors);
   }
-  if (projectContent !== null) {
+  if (projectContent !== null && isAgentRegistryMarkdown(projectContent)) {
     const r = parseAgentsMd(projectContent);
     for (const a of r.agents) byName.set(a.name, { ...a, source: 'project' });
     errors.push(...r.errors);

apps/server/src/services/auto_name.ts

@@ -67,7 +67,8 @@ export async function maybeAutoNameChat(
   const sessionRows = await ctx.sql<{ model: string }[]>`
     SELECT model FROM sessions WHERE id = ${sessionId}
   `;
-  const model = sessionRows[0]?.model;
+  // v2.0.5: prefer FAST_MODEL for cheap LLM calls (titles, summaries).
+  const model = ctx.config.FAST_MODEL ?? sessionRows[0]?.model;
   if (!model) return;
 
   const assistantMsg = await ctx.sql<{ content: string }[]>`

apps/server/src/services/inference/index.ts

@@ -20,3 +20,5 @@ export type {
 export type { ToolPhaseResult } from './tool-phase.js';
 export { detectDoomLoop, DOOM_LOOP_THRESHOLD } from './sentinels.js';
 export { buildMessagesPayload } from './payload.js';
+export { generateToolUseSummary } from './tool-summaries.js';
+export type { ToolInfo } from './tool-summaries.js';

apps/server/src/services/inference/payload.ts

@@ -37,6 +37,34 @@ export interface OpenAiMessage {
 // omit it and exercise the byte-stability surface directly through
 // buildSystemPromptWithFingerprint. The observer Map in system-prompt.ts
 // updates regardless of whether log is passed.
+function toolResultIdsFollowing(history: Message[], assistantIdx: number): Set<string> {
+  const ids = new Set<string>();
+  for (let j = assistantIdx + 1; j < history.length; j++) {
+    const row = history[j]!;
+    if (row.role === 'user' || row.role === 'assistant') break;
+    if (row.role === 'tool' && row.tool_results?.tool_call_id) {
+      ids.add(row.tool_results.tool_call_id);
+    }
+  }
+  return ids;
+}
+
+function findAssistantOwnerForToolCall(history: Message[], toolIdx: number, callId: string): number | null {
+  for (let k = toolIdx - 1; k >= 0; k--) {
+    const row = history[k]!;
+    if (row.role === 'user') break;
+    if (row.role === 'assistant' && row.tool_calls?.some((tc) => tc.id === callId)) return k;
+  }
+  return null;
+}
+
+function assistantToolCallsArePayloadComplete(history: Message[], assistantIdx: number): boolean {
+  const assistant = history[assistantIdx]!;
+  if (!assistant.tool_calls?.length) return false;
+  const fulfilled = toolResultIdsFollowing(history, assistantIdx);
+  return assistant.tool_calls.every((tc) => fulfilled.has(tc.id));
+}
+
 export async function buildMessagesPayload(
   session: Session,
   project: Project,
@@ -97,6 +125,10 @@ export async function buildMessagesPayload(
     if (m.role === 'tool') {
       const tr = m.tool_results;
       if (!tr) continue;
+      const ownerIdx = findAssistantOwnerForToolCall(history, i, tr.tool_call_id);
+      if (ownerIdx == null || !assistantToolCallsArePayloadComplete(history, ownerIdx)) {
+        continue;
+      }
       const outputText = tr.error
         ? `error: ${tr.error}`
         : typeof tr.output === 'string'
@@ -115,11 +147,15 @@ export async function buildMessagesPayload(
         content: m.content && m.content.length > 0 ? m.content : null,
       };
       if (m.tool_calls && m.tool_calls.length > 0) {
-        msg.tool_calls = m.tool_calls.map((tc) => ({
-          id: tc.id,
-          type: 'function' as const,
-          function: { name: tc.name, arguments: JSON.stringify(tc.args) },
-        }));
+        if (assistantToolCallsArePayloadComplete(history, i)) {
+          msg.tool_calls = m.tool_calls.map((tc) => ({
+            id: tc.id,
+            type: 'function' as const,
+            function: { name: tc.name, arguments: JSON.stringify(tc.args) },
+          }));
+        }
+        // Orphaned tool_calls (no matching tool rows) are stripped so the
+        // upstream API does not reject the payload on the next user turn.
       }
       // v1.13.1-C: collapse reasoning_parts into a single string. The view
       // returns them ordered by sequence; multiple reasoning parts on one
@@ -127,6 +163,11 @@ export async function buildMessagesPayload(
       if (m.reasoning_parts && m.reasoning_parts.length > 0) {
         msg.reasoning = m.reasoning_parts.map((p) => p.text ?? '').join('');
       }
+      const hasPayload =
+        (msg.content != null && msg.content.trim().length > 0) ||
+        (msg.tool_calls != null && msg.tool_calls.length > 0) ||
+        (msg.reasoning != null && msg.reasoning.length > 0);
+      if (!hasPayload) continue;
       out.push(msg);
       continue;
     }
@@ -142,7 +183,7 @@ export async function loadContext(
 ): Promise<{ session: Session; project: Project; history: Message[] } | null> {
   const sessionRows = await sql<Session[]>`
     SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at,
-           agent_id, web_search_enabled
+           agent_id, web_search_enabled, allowed_read_paths
     FROM sessions WHERE id = ${sessionId}
   `;
   if (sessionRows.length === 0) return null;

apps/server/src/services/inference/sentinel-summaries.ts

@@ -36,6 +36,8 @@ export async function runCapHitSummary(
 ): Promise<void> {
   const { sessionId, chatId, assistantMessageId, signal } = args;
 
+  await insertCapHitSentinel(ctx, sessionId, chatId, agent, budget);
+
   const messages = await buildMessagesPayload(session, project, history, agent, ctx.log);
   messages.push({ role: 'system', content: CAP_HIT_SUMMARY_NOTE(budget) });
 
@@ -195,8 +197,6 @@ export async function runCapHitSummary(
     updated_at: sessRow!.updated_at,
   });
 
-  await insertCapHitSentinel(ctx, sessionId, chatId, agent, budget);
-
   // Status frame fires last so the dot color reflects the terminal state.
   // Success → idle, abort → idle (user-driven stop), error → error+reason.
   if (summaryOk) {

apps/server/src/services/inference/tool-summaries.ts

@@ -0,0 +1,81 @@
+/**
+ * v2.0.5: Tool-use summary generation.
+ *
+ * After a batch of tool calls completes, fire a cheap LLM call to generate
+ * a "git-commit-subject-style" one-liner label describing what the tools
+ * accomplished. Ported from the Qwen Code source recon.
+ */
+import type { FastifyBaseLogger } from 'fastify';
+
+const TOOL_SUMMARY_SYSTEM_PROMPT = `Write a short summary label describing what these tool calls accomplished. Think git-commit-subject, not sentence. Past tense, most distinctive noun. Max 30 characters. Output ONLY the label.
+
+Examples:
+- Searched in auth/
+- Fixed NPE in UserService
+- Created signup endpoint
+- Read config.json
+- Ran failing tests`;
+
+const INPUT_TRUNCATE = 300;
+const MAX_SUMMARY_LENGTH = 100;
+
+export interface ToolInfo {
+  name: string;
+  input: string;
+  output: string;
+}
+
+export async function generateToolUseSummary(opts: {
+  tools: ToolInfo[];
+  llamaSwapUrl: string;
+  model: string;
+  log: FastifyBaseLogger;
+  signal?: AbortSignal;
+}): Promise<string | null> {
+  const { tools, llamaSwapUrl, model, log, signal } = opts;
+  if (tools.length === 0) return null;
+  if (signal?.aborted) return null;
+
+  const toolText = tools
+    .map(t => `Tool: ${t.name}\nInput: ${t.input.slice(0, INPUT_TRUNCATE)}\nOutput: ${t.output.slice(0, INPUT_TRUNCATE)}`)
+    .join('\n\n');
+
+  try {
+    const res = await fetch(`${llamaSwapUrl}/v1/chat/completions`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        model,
+        messages: [
+          { role: 'system', content: TOOL_SUMMARY_SYSTEM_PROMPT },
+          { role: 'user', content: toolText },
+        ],
+        max_tokens: 30,
+        temperature: 0.2,
+        stream: false,
+        chat_template_kwargs: { enable_thinking: false },
+      }),
+      signal,
+    });
+    if (!res.ok) {
+      log.debug({ status: res.status }, 'tool-summary: LLM request failed');
+      return null;
+    }
+    const data = await res.json() as { choices?: Array<{ message?: { content?: string } }> };
+    const raw = data.choices?.[0]?.message?.content?.trim() ?? '';
+    if (!raw) return null;
+    // Clean: strip quotes, "Label:" prefix, cap length
+    let cleaned = raw.split('\n')[0]?.trim() ?? '';
+    cleaned = cleaned
+      .replace(/^[-*•]\s+/, '')
+      .replace(/^["'`‘’“”]|["'`‘’“”]$/g, '')
+      .replace(/^(label|summary)\s*:\s*/i, '')
+      .trim();
+    return cleaned.length > MAX_SUMMARY_LENGTH
+      ? cleaned.slice(0, MAX_SUMMARY_LENGTH).trim()
+      : cleaned || null;
+  } catch (err) {
+    log.debug({ err: err instanceof Error ? err.message : String(err) }, 'tool-summary: error');
+    return null;
+  }
+}

apps/server/src/services/skill-invoke.ts

@@ -0,0 +1,148 @@
+import { randomUUID } from 'node:crypto';
+import type { Sql } from '../db.js';
+
+export const DEFAULT_SKILL_USER_MESSAGE = 'Apply this skill.';
+
+export interface SkillInvokeTransactionResult {
+  synth_assistant_id: string;
+  tool_message_id: string;
+  user_message_id: string;
+  assistant_message_id: string;
+}
+
+export interface SkillInvokeToolCall {
+  id: string;
+  name: 'skill_use';
+  args: { name: string };
+}
+
+export type SkillInvokeSessionFrame = Record<string, unknown> & { type: string };
+
+export async function runSkillInvokeTransaction(
+  sql: Sql,
+  args: {
+    sessionId: string;
+    chatId: string;
+    skillName: string;
+    skillBody: string;
+    userText: string;
+  },
+): Promise<{ result: SkillInvokeTransactionResult; toolCall: SkillInvokeToolCall }> {
+  const toolCallId = randomUUID();
+  const toolCall: SkillInvokeToolCall = {
+    id: toolCallId,
+    name: 'skill_use',
+    args: { name: args.skillName },
+  };
+  const toolResults = {
+    tool_call_id: toolCallId,
+    output: args.skillBody,
+    truncated: false,
+  };
+
+  const result = await sql.begin(async (tx) => {
+    const [synthAssistant] = await tx<{ id: string }[]>`
+      INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+      VALUES (${args.sessionId}, ${args.chatId}, 'assistant', '', 'complete', clock_timestamp())
+      RETURNING id
+    `;
+    await tx`
+      INSERT INTO message_parts (message_id, sequence, kind, payload)
+      VALUES (${synthAssistant!.id}, 0, 'tool_call', ${tx.json({
+        id: toolCallId,
+        name: 'skill_use',
+        args: { name: args.skillName },
+      } as never)})
+    `;
+    const [toolMsg] = await tx<{ id: string }[]>`
+      INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+      VALUES (${args.sessionId}, ${args.chatId}, 'tool', '', 'complete', clock_timestamp())
+      RETURNING id
+    `;
+    await tx`
+      INSERT INTO message_parts (message_id, sequence, kind, payload)
+      VALUES (${toolMsg!.id}, 0, 'tool_result', ${tx.json(toolResults as never)})
+    `;
+    const [userMsg] = await tx<{ id: string }[]>`
+      INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+      VALUES (${args.sessionId}, ${args.chatId}, 'user', ${args.userText}, 'complete', clock_timestamp())
+      RETURNING id
+    `;
+    const [assistantMsg] = await tx<{ id: string }[]>`
+      INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+      VALUES (${args.sessionId}, ${args.chatId}, 'assistant', '', 'streaming', clock_timestamp())
+      RETURNING id
+    `;
+    await tx`UPDATE sessions SET updated_at = clock_timestamp() WHERE id = ${args.sessionId}`;
+    await tx`UPDATE chats SET updated_at = clock_timestamp() WHERE id = ${args.chatId}`;
+    return {
+      synth_assistant_id: synthAssistant!.id,
+      tool_message_id: toolMsg!.id,
+      user_message_id: userMsg!.id,
+      assistant_message_id: assistantMsg!.id,
+    };
+  });
+
+  return { result, toolCall };
+}
+
+export function buildSkillInvokeSyntheticFrames(
+  chatId: string,
+  result: SkillInvokeTransactionResult,
+  toolCall: SkillInvokeToolCall,
+  skillBody: string,
+): SkillInvokeSessionFrame[] {
+  return [
+    {
+      type: 'message_started',
+      message_id: result.synth_assistant_id,
+      chat_id: chatId,
+      role: 'assistant',
+    },
+    {
+      type: 'tool_call',
+      message_id: result.synth_assistant_id,
+      chat_id: chatId,
+      tool_call: toolCall,
+    },
+    {
+      type: 'message_complete',
+      message_id: result.synth_assistant_id,
+      chat_id: chatId,
+    },
+    {
+      type: 'tool_result',
+      tool_message_id: result.tool_message_id,
+      tool_call_id: toolCall.id,
+      chat_id: chatId,
+      output: skillBody,
+      truncated: false,
+    },
+  ];
+}
+
+export function buildSkillInvokeUserFrames(
+  chatId: string,
+  userMessageId: string,
+  userText: string,
+): SkillInvokeSessionFrame[] {
+  return [
+    {
+      type: 'message_started',
+      message_id: userMessageId,
+      chat_id: chatId,
+      role: 'user',
+    },
+    {
+      type: 'delta',
+      message_id: userMessageId,
+      chat_id: chatId,
+      content: userText,
+    },
+    {
+      type: 'message_complete',
+      message_id: userMessageId,
+      chat_id: chatId,
+    },
+  ];
+}

apps/server/src/services/skills.ts

@@ -16,7 +16,7 @@ import { pathGuard, PathScopeError } from './path_guard.js';
 // new skills, per-entry mtime check on body access so a hot-edited SKILL.md
 // is re-read without a restart. No watcher.
 
-const SKILLS_ROOT = '/data/skills';
+const SKILLS_ROOT = process.env.SKILLS_ROOT ?? '/data/skills';
 const MAX_RESOURCE_BYTES = 5 * 1024 * 1024;
 const LIST_CACHE_TTL_MS = 60_000;
 

apps/server/src/types/ws-frames.ts

@@ -85,6 +85,13 @@ export const DeltaFrame = z.object({
   content: z.string(),
 });
 
+export const ReasoningDeltaFrame = z.object({
+  type: z.literal('reasoning_delta'),
+  message_id: Uuid,
+  chat_id: Uuid.optional(),
+  content: z.string(),
+});
+
 export const ToolCallFrame = z.object({
   type: z.literal('tool_call'),
   message_id: Uuid,
@@ -256,6 +263,37 @@ export const ProjectDeletedFrame = z.object({
   project_id: Uuid,
 });
 
+const PermissionOptionShape = z.object({
+  option_id: z.string(),
+  label: z.string(),
+});
+
+export const PermissionRequestedFrame = z.object({
+  type: z.literal('permission_requested'),
+  task_id: Uuid,
+  session_id: Uuid,
+  tool_title: z.string().optional(),
+  options: z.array(PermissionOptionShape),
+});
+
+export const PermissionResolvedFrame = z.object({
+  type: z.literal('permission_resolved'),
+  task_id: Uuid,
+  session_id: Uuid,
+});
+
+const AgentCommandShape = z.object({
+  name: z.string(),
+  description: z.string().optional(),
+});
+
+export const AgentCommandsFrame = z.object({
+  type: z.literal('agent_commands'),
+  task_id: Uuid,
+  session_id: Uuid,
+  commands: z.array(AgentCommandShape),
+});
+
 // ---- discriminated union ---------------------------------------------------
 
 export const WsFrameSchema = z.discriminatedUnion('type', [
@@ -263,6 +301,7 @@ export const WsFrameSchema = z.discriminatedUnion('type', [
   SnapshotFrame,
   MessageStartedFrame,
   DeltaFrame,
+  ReasoningDeltaFrame,
   ToolCallFrame,
   ToolResultFrame,
   MessageCompleteFrame,
@@ -271,6 +310,9 @@ export const WsFrameSchema = z.discriminatedUnion('type', [
   ChatRenamedFrame,
   CompactedFrame,
   ErrorFrame,
+  PermissionRequestedFrame,
+  PermissionResolvedFrame,
+  AgentCommandsFrame,
   // per-user
   ChatStatusFrame,
   SessionUpdatedFrame,
@@ -300,6 +342,7 @@ export const KNOWN_FRAME_TYPES: readonly WsFrame['type'][] = [
   'snapshot',
   'message_started',
   'delta',
+  'reasoning_delta',
   'tool_call',
   'tool_result',
   'message_complete',
@@ -308,6 +351,9 @@ export const KNOWN_FRAME_TYPES: readonly WsFrame['type'][] = [
   'chat_renamed',
   'compacted',
   'error',
+  'permission_requested',
+  'permission_resolved',
+  'agent_commands',
   'chat_status',
   'session_updated',
   'session_renamed',

apps/web/src/api/client.ts

@@ -13,6 +13,13 @@ import type {
   Skill,
   AskUserAnswer,
   ToolCostStat,
+  ProviderSnapshotEntry,
+  CoderSendMessageBody,
+  CoderSendMessageResponse,
+  CoderMessageWire,
+  CoderTaskDetail,
+  PermissionPrompt,
+  AgentCommand,
 } from './types';
 
 export class ApiError extends Error {
@@ -298,6 +305,49 @@ export const api = {
 
   models: () => request<ModelInfo[]>('/api/models'),
 
+  coder: {
+    snapshot: (cwd?: string) => {
+      const qs = cwd ? `?cwd=${encodeURIComponent(cwd)}` : '';
+      return request<ProviderSnapshotEntry[]>(`/api/coder/providers/snapshot${qs}`);
+    },
+    refreshProviders: () =>
+      request<{ refreshed: number }>('/api/coder/providers/refresh', { method: 'POST' }),
+    sendMessage: (sessionId: string, body: CoderSendMessageBody) =>
+      request<CoderSendMessageResponse>(`/api/coder/sessions/${sessionId}/messages`, {
+        method: 'POST',
+        body: JSON.stringify(body),
+      }),
+    getTaskPermission: (taskId: string) =>
+      request<PermissionPrompt>(`/api/coder/tasks/${taskId}/permission`),
+    respondTaskPermission: (taskId: string, optionId: string | null) =>
+      request<{ ok: boolean }>(`/api/coder/tasks/${taskId}/permission`, {
+        method: 'POST',
+        body: JSON.stringify({ option_id: optionId }),
+      }),
+    getTaskCommands: (taskId: string) =>
+      request<{ taskId: string; commands: AgentCommand[] }>(`/api/coder/tasks/${taskId}/commands`),
+    getTask: (taskId: string) =>
+      request<CoderTaskDetail>(`/api/coder/tasks/${taskId}`),
+    listMessages: (sessionId: string, chatId?: string) =>
+      request<CoderMessageWire[]>(
+        `/api/coder/sessions/${sessionId}/messages${chatId ? `?chat_id=${encodeURIComponent(chatId)}` : ''}`,
+      ),
+    skillInvoke: (sessionId: string, paneId: string, skillName: string, userMessage: string | null) =>
+      request<{
+        user_message_id: string;
+        assistant_message_id: string;
+        synth_assistant_id: string;
+        tool_message_id: string;
+      }>(`/api/coder/sessions/${sessionId}/skill_invoke`, {
+        method: 'POST',
+        body: JSON.stringify({
+          pane_id: paneId,
+          skill_name: skillName,
+          user_message: userMessage,
+        }),
+      }),
+  },
+
   agents: {
     list: (projectId: string) =>
       request<AgentsResponse>(`/api/projects/${projectId}/agents`),

apps/web/src/api/types.ts

@@ -206,6 +206,100 @@ export interface ModelInfo {
   [key: string]: unknown;
 }
 
+export interface ProviderModel {
+  id: string;
+  label: string;
+  description?: string;
+  isDefault?: boolean;
+  thinkingOptions?: ThinkingOption[];
+  defaultThinkingOptionId?: string;
+}
+
+export interface ProviderMode {
+  id: string;
+  label: string;
+  description?: string;
+  isUnattended?: boolean;
+}
+
+export interface ThinkingOption {
+  id: string;
+  label: string;
+  isDefault?: boolean;
+}
+
+export type ProviderSnapshotStatus = 'ready' | 'error';
+
+export interface ProviderSnapshotEntry {
+  name: string;
+  label: string;
+  transport: string;
+  status: ProviderSnapshotStatus;
+  installed: boolean;
+  models: ProviderModel[];
+  modes: ProviderMode[];
+  defaultModeId: string | null;
+  commands: AgentCommand[];
+  error?: string;
+}
+
+export interface AgentSessionConfig {
+  provider: string;
+  model: string;
+  modeId: string | null;
+  thinkingOptionId: string | null;
+}
+
+export interface PermissionPrompt {
+  taskId: string;
+  toolTitle?: string;
+  options: Array<{ optionId: string; label: string }>;
+}
+
+export interface AgentCommand {
+  name: string;
+  description?: string;
+}
+
+export interface CoderSendMessageBody {
+  content: string;
+  pane_id: string;
+  chat_id?: string;
+  provider?: string;
+  model?: string;
+  mode_id?: string;
+  thinking_option_id?: string;
+}
+
+export interface CoderSendMessageResponse {
+  user_message_id?: string;
+  assistant_message_id?: string;
+  task_id?: string;
+  dispatched?: boolean;
+}
+
+export interface CoderMessageWire {
+  id: string;
+  role: 'user' | 'assistant' | 'system';
+  content: string;
+  status?: 'streaming' | 'complete' | 'failed';
+  reasoning_text?: string;
+  tool_calls?: Array<{
+    id: string;
+    function: { name: string; arguments: string };
+  }>;
+}
+
+export interface CoderTaskDetail {
+  id: string;
+  state: 'pending' | 'running' | 'completed' | 'failed' | 'blocked' | 'cancelled';
+  input: string;
+  output_summary: string | null;
+  agent: string | null;
+  model: string | null;
+  session_id: string | null;
+}
+
 export interface SidebarSession {
   id: string;
   name: string;

apps/web/src/api/ws-frames.ts

@@ -85,6 +85,13 @@ export const DeltaFrame = z.object({
   content: z.string(),
 });
 
+export const ReasoningDeltaFrame = z.object({
+  type: z.literal('reasoning_delta'),
+  message_id: Uuid,
+  chat_id: Uuid.optional(),
+  content: z.string(),
+});
+
 export const ToolCallFrame = z.object({
   type: z.literal('tool_call'),
   message_id: Uuid,
@@ -256,6 +263,37 @@ export const ProjectDeletedFrame = z.object({
   project_id: Uuid,
 });
 
+const PermissionOptionShape = z.object({
+  option_id: z.string(),
+  label: z.string(),
+});
+
+export const PermissionRequestedFrame = z.object({
+  type: z.literal('permission_requested'),
+  task_id: Uuid,
+  session_id: Uuid,
+  tool_title: z.string().optional(),
+  options: z.array(PermissionOptionShape),
+});
+
+export const PermissionResolvedFrame = z.object({
+  type: z.literal('permission_resolved'),
+  task_id: Uuid,
+  session_id: Uuid,
+});
+
+const AgentCommandShape = z.object({
+  name: z.string(),
+  description: z.string().optional(),
+});
+
+export const AgentCommandsFrame = z.object({
+  type: z.literal('agent_commands'),
+  task_id: Uuid,
+  session_id: Uuid,
+  commands: z.array(AgentCommandShape),
+});
+
 // ---- discriminated union ---------------------------------------------------
 
 export const WsFrameSchema = z.discriminatedUnion('type', [
@@ -263,6 +301,7 @@ export const WsFrameSchema = z.discriminatedUnion('type', [
   SnapshotFrame,
   MessageStartedFrame,
   DeltaFrame,
+  ReasoningDeltaFrame,
   ToolCallFrame,
   ToolResultFrame,
   MessageCompleteFrame,
@@ -271,6 +310,9 @@ export const WsFrameSchema = z.discriminatedUnion('type', [
   ChatRenamedFrame,
   CompactedFrame,
   ErrorFrame,
+  PermissionRequestedFrame,
+  PermissionResolvedFrame,
+  AgentCommandsFrame,
   // per-user
   ChatStatusFrame,
   SessionUpdatedFrame,
@@ -300,6 +342,7 @@ export const KNOWN_FRAME_TYPES: readonly WsFrame['type'][] = [
   'snapshot',
   'message_started',
   'delta',
+  'reasoning_delta',
   'tool_call',
   'tool_result',
   'message_complete',
@@ -308,6 +351,9 @@ export const KNOWN_FRAME_TYPES: readonly WsFrame['type'][] = [
   'chat_renamed',
   'compacted',
   'error',
+  'permission_requested',
+  'permission_resolved',
+  'agent_commands',
   'chat_status',
   'session_updated',
   'session_renamed',

apps/web/src/components/AgentCommandsHint.tsx

@@ -0,0 +1,39 @@
+import { ChevronDown } from 'lucide-react';
+import { useState } from 'react';
+import type { AgentCommand } from '@/api/types';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  commands: AgentCommand[];
+}
+
+export function AgentCommandsHint({ commands }: Props) {
+  const [open, setOpen] = useState(false);
+
+  if (commands.length === 0) return null;
+
+  return (
+    <div className="mx-2 mb-1 rounded-md border border-border/60 bg-muted/30 text-xs">
+      <button
+        type="button"
+        onClick={() => setOpen((v) => !v)}
+        className="w-full flex items-center justify-between px-2 py-1.5 text-muted-foreground hover:text-foreground max-md:min-h-[44px]"
+      >
+        <span>Slash commands ({commands.length})</span>
+        <ChevronDown className={cn('size-3.5 transition-transform', open && 'rotate-180')} />
+      </button>
+      {open && (
+        <ul className="px-2 pb-2 space-y-1 border-t border-border/40 max-h-48 overflow-y-auto overscroll-contain touch-pan-y">
+          {commands.map((cmd) => (
+            <li key={cmd.name} className="font-mono">
+              <span className="text-primary/80">/{cmd.name}</span>
+              {cmd.description && (
+                <span className="ml-1.5 text-muted-foreground font-sans line-clamp-1">{cmd.description}</span>
+              )}
+            </li>
+          ))}
+        </ul>
+      )}
+    </div>
+  );
+}

apps/web/src/components/AgentComposerBar.tsx

@@ -0,0 +1,308 @@
+import { useEffect, useMemo, useRef, useState } from 'react';
+import { Check, ChevronDown, RefreshCw, Shield, Cpu, Brain } from 'lucide-react';
+import { api } from '@/api/client';
+import type { AgentSessionConfig, ProviderSnapshotEntry, AgentCommand } from '@/api/types';
+import { useProviderSnapshot, refreshProviderSnapshot } from '@/hooks/useProviderSnapshot';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+import { BottomSheet } from '@/components/BottomSheet';
+import { useViewport } from '@/hooks/useViewport';
+import { cn } from '@/lib/utils';
+
+const PREFS_KEY = 'boocode.coder.agent-prefs';
+
+
+type ProviderPrefs = Record<string, {
+  model: string;
+  modeId: string | null;
+  thinkingOptionId: string | null;
+}>;
+
+function loadPrefs(): ProviderPrefs {
+  try {
+    const raw = localStorage.getItem(PREFS_KEY);
+    return raw ? (JSON.parse(raw) as ProviderPrefs) : {};
+  } catch {
+    return {};
+  }
+}
+
+function savePrefs(prefs: ProviderPrefs): void {
+  localStorage.setItem(PREFS_KEY, JSON.stringify(prefs));
+}
+
+function defaultsForProvider(entry: ProviderSnapshotEntry): AgentSessionConfig {
+  const model =
+    entry.models.find((m) => m.isDefault)?.id ??
+    entry.models[0]?.id ??
+    '';
+  const selectedModel = entry.models.find((m) => m.id === model);
+  const modeId = entry.defaultModeId ?? entry.modes[0]?.id ?? null;
+  const thinkingOptionId =
+    selectedModel?.defaultThinkingOptionId ??
+    selectedModel?.thinkingOptions?.find((t) => t.isDefault)?.id ??
+    selectedModel?.thinkingOptions?.[0]?.id ??
+    null;
+
+  return {
+    provider: entry.name,
+    model,
+    modeId,
+    thinkingOptionId,
+  };
+}
+
+function resolveConfig(
+  entry: ProviderSnapshotEntry,
+  prefs: ProviderPrefs,
+): AgentSessionConfig {
+  const saved = prefs[entry.name];
+  const base = defaultsForProvider(entry);
+
+  const model =
+    saved?.model && entry.models.some((m) => m.id === saved.model)
+      ? saved.model
+      : base.model;
+
+  const selectedModel = entry.models.find((m) => m.id === model);
+  const modeId =
+    saved?.modeId && entry.modes.some((m) => m.id === saved.modeId)
+      ? saved.modeId
+      : base.modeId;
+
+  const thinkingOptions = selectedModel?.thinkingOptions ?? [];
+  const thinkingOptionId =
+    saved?.thinkingOptionId &&
+    thinkingOptions.some((t) => t.id === saved.thinkingOptionId)
+      ? saved.thinkingOptionId
+      : base.thinkingOptionId;
+
+  return { provider: entry.name, model, modeId, thinkingOptionId };
+}
+
+interface PickerProps {
+  label: string;
+  value: string;
+  disabled?: boolean;
+  options: Array<{ id: string; label: string }>;
+  onPick: (id: string) => void;
+  icon?: React.ReactNode;
+}
+
+function CompactPicker({ label, value, disabled, options, onPick, icon }: PickerProps) {
+  const { isMobile } = useViewport();
+  const [open, setOpen] = useState(false);
+  const currentLabel = options.find((o) => o.id === value)?.label ?? (value || label);
+
+  const list = (
+    <div className="py-1">
+      {options.map((o) => (
+        <button
+          key={o.id}
+          type="button"
+          onClick={() => {
+            onPick(o.id);
+            setOpen(false);
+          }}
+          className="w-full text-left flex items-center gap-2 font-mono text-xs px-2 py-1.5 hover:bg-accent rounded"
+        >
+          <Check className={cn('size-3 shrink-0', o.id === value ? 'opacity-100' : 'opacity-0')} />
+          <span className="truncate">{o.label}</span>
+        </button>
+      ))}
+    </div>
+  );
+
+  if (isMobile) {
+    return (
+      <>
+        <button
+          type="button"
+          disabled={disabled}
+          onClick={() => setOpen(true)}
+          aria-label={`${label}: ${currentLabel}`}
+          className="inline-flex items-center justify-center min-h-[44px] min-w-[44px] rounded text-muted-foreground hover:text-foreground disabled:opacity-40"
+        >
+          {icon ?? <Cpu className="size-4" />}
+        </button>
+        <BottomSheet open={open} onClose={() => setOpen(false)} title={label}>
+          <div className="px-2">{list}</div>
+        </BottomSheet>
+      </>
+    );
+  }
+
+  return (
+    <DropdownMenu open={open} onOpenChange={setOpen}>
+      <DropdownMenuTrigger asChild>
+        <button
+          type="button"
+          disabled={disabled}
+          className="text-xs font-mono text-muted-foreground hover:text-foreground flex items-center gap-1 px-1.5 py-0.5 rounded hover:bg-muted/60 disabled:opacity-40 max-w-[140px]"
+        >
+          {icon}
+          <span className="truncate">{currentLabel}</span>
+          <ChevronDown className="size-3 opacity-70 shrink-0" />
+        </button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="start" className="max-h-64 overflow-y-auto min-w-[160px]">
+        {options.map((o) => (
+          <DropdownMenuItem key={o.id} onSelect={() => onPick(o.id)} className="font-mono text-xs">
+            <Check className={cn('size-3 shrink-0', o.id === value ? 'opacity-100' : 'opacity-0')} />
+            {o.label}
+          </DropdownMenuItem>
+        ))}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}
+
+interface Props {
+  projectPath?: string;
+  value: AgentSessionConfig;
+  onChange: (next: AgentSessionConfig) => void;
+  onProviderCommandsChange?: (commands: AgentCommand[]) => void;
+}
+
+export function AgentComposerBar({ projectPath, value, onChange, onProviderCommandsChange }: Props) {
+  const allEntries = useProviderSnapshot(projectPath);
+  const entries = useMemo(
+    () => allEntries?.filter((e) => e.installed && e.status !== 'error') ?? null,
+    [allEntries],
+  );
+  const [refreshing, setRefreshing] = useState(false);
+
+  const hydratedRef = useRef(false);
+
+  useEffect(() => {
+    hydratedRef.current = false;
+  }, [projectPath]);
+
+  useEffect(() => {
+    if (!entries?.length || hydratedRef.current) return;
+    hydratedRef.current = true;
+    const prefs = loadPrefs();
+    const entry =
+      entries.find((e) => e.name === value.provider) ??
+      entries.find((e) => e.name === 'boocode') ??
+      entries[0];
+    if (!entry) return;
+    onChange(resolveConfig(entry, prefs));
+  }, [entries, onChange, value.provider]);
+
+  const currentEntry = useMemo(
+    () => entries?.find((e) => e.name === value.provider),
+    [entries, value.provider],
+  );
+
+  const currentModel = useMemo(
+    () => currentEntry?.models.find((m) => m.id === value.model),
+    [currentEntry, value.model],
+  );
+
+  const thinkingOptions = currentModel?.thinkingOptions ?? [];
+
+  useEffect(() => {
+    onProviderCommandsChange?.(currentEntry?.commands ?? []);
+  }, [currentEntry, onProviderCommandsChange]);
+
+  function persist(next: AgentSessionConfig): void {
+    const prefs = loadPrefs();
+    prefs[next.provider] = {
+      model: next.model,
+      modeId: next.modeId,
+      thinkingOptionId: next.thinkingOptionId,
+    };
+    savePrefs(prefs);
+    onChange(next);
+  }
+
+  function pickProvider(name: string): void {
+    const entry = entries?.find((e) => e.name === name);
+    if (!entry) return;
+    persist(resolveConfig(entry, loadPrefs()));
+  }
+
+  function pickModel(model: string): void {
+    const entry = currentEntry;
+    if (!entry) return;
+    const selected = entry.models.find((m) => m.id === model);
+    const thinkingOptionId =
+      selected?.defaultThinkingOptionId ??
+      selected?.thinkingOptions?.find((t) => t.isDefault)?.id ??
+      selected?.thinkingOptions?.[0]?.id ??
+      null;
+    persist({ ...value, model, thinkingOptionId });
+  }
+
+  async function handleRefresh(): Promise<void> {
+    setRefreshing(true);
+    try {
+      await api.coder.refreshProviders();
+      await refreshProviderSnapshot(projectPath);
+    } finally {
+      setRefreshing(false);
+    }
+  }
+
+  if (!entries) {
+    return (
+      <div className="text-xs text-muted-foreground px-2 py-1">Loading agents…</div>
+    );
+  }
+
+  const providerOptions = entries.map((e) => ({ id: e.name, label: e.label }));
+  const modeOptions = (currentEntry?.modes ?? []).map((m) => ({ id: m.id, label: m.label }));
+  const modelOptions = (currentEntry?.models ?? []).map((m) => ({ id: m.id, label: m.label }));
+  const thinkingOpts = thinkingOptions.map((t) => ({ id: t.id, label: t.label }));
+
+  return (
+    <div className="flex flex-wrap items-center gap-1 px-2 py-1 border-b border-border bg-muted/20 shrink-0">
+      <CompactPicker
+        label="Provider"
+        value={value.provider}
+        options={providerOptions}
+        onPick={pickProvider}
+        icon={<Cpu className="size-3 shrink-0" />}
+      />
+      <CompactPicker
+        label="Mode"
+        value={value.modeId ?? ''}
+        disabled={modeOptions.length === 0}
+        options={modeOptions}
+        onPick={(modeId) => persist({ ...value, modeId })}
+        icon={<Shield className="size-3 shrink-0" />}
+      />
+      <CompactPicker
+        label="Model"
+        value={value.model}
+        disabled={modelOptions.length === 0}
+        options={modelOptions}
+        onPick={pickModel}
+      />
+      {thinkingOpts.length > 0 && (
+        <CompactPicker
+          label="Thinking"
+          value={value.thinkingOptionId ?? ''}
+          options={thinkingOpts}
+          onPick={(thinkingOptionId) => persist({ ...value, thinkingOptionId })}
+          icon={<Brain className="size-3 shrink-0" />}
+        />
+      )}
+      <button
+        type="button"
+        onClick={() => void handleRefresh()}
+        disabled={refreshing}
+        className="ml-auto inline-flex items-center justify-center size-7 max-md:min-h-[44px] max-md:min-w-[44px] rounded text-muted-foreground hover:text-foreground disabled:opacity-40"
+        aria-label="Refresh provider list"
+        title="Refresh providers"
+      >
+        <RefreshCw className={cn('size-3.5', refreshing && 'animate-spin')} />
+      </button>
+    </div>
+  );
+}

apps/web/src/components/ChatInput.tsx

@@ -23,7 +23,8 @@ import { FileMentionPopover } from '@/components/FileMentionPopover';
 import { DropOverlay } from '@/components/DropOverlay';
 import { AgentPicker } from '@/components/AgentPicker';
 import { ContextBar } from '@/components/ContextBar';
-import { SkillSlashCommand } from '@/components/SkillSlashCommand';
+import { SlashCommandPicker } from '@/components/SlashCommandPicker';
+import { isSlashCommandToken, parseSlashInput, slashQuery } from '@/lib/slash-command';
 import { api } from '@/api/client';
 import type { Message } from '@/api/types';
 import { sessionEvents } from '@/hooks/sessionEvents';
@@ -87,10 +88,8 @@ export function ChatInput({ disabled, projectId, agentId, onAgentChange, session
   // Batch 9.6: slash-command dropdown. Opens when `/` is the first char of
   // the input and stays open while the input is `/<word>` with no whitespace.
   // Disabled entirely when the caller doesn't pass onSlashCommand.
-  // v1.12 CP7.5: anchorRect was a snapshot taken at open time. SkillSlashCommand
-  // now reads the live textarea rect via inputRef (textareaRef below) so it can
-  // recompute on visualViewport changes (iOS keyboard open/close), so the
-  // anchorRect field is no longer needed in this state.
+  // SlashCommandPicker reads the live textarea rect via inputRef (textareaRef below)
+  // so it can recompute on visualViewport changes (iOS keyboard open/close).
   const [slashState, setSlashState] = useState<{
     query: string;
   } | null>(null);
@@ -168,13 +167,11 @@ export function ChatInput({ disabled, projectId, agentId, onAgentChange, session
     // input parses to a known skill. Falls through to onSend for unknown
     // slash names (literal text) or when slash dispatch isn't wired.
     if (onSlashCommand && attachments.length === 0 && text.startsWith('/')) {
-      const match = text.match(/^\/(\S+)\s*([\s\S]*)$/);
-      if (match && skillsLookup.has(match[1]!)) {
-        const skillName = match[1]!;
-        const args = (match[2] ?? '').trim();
+      const parsed = parseSlashInput(text);
+      if (parsed && skillsLookup.has(parsed.cmdName)) {
         setBusy(true);
         try {
-          await onSlashCommand(skillName, args);
+          await onSlashCommand(parsed.cmdName, parsed.args);
           setValue('');
           setAttachments([]);
           setSlashState(null);
@@ -268,8 +265,8 @@ export function ChatInput({ disabled, projectId, agentId, onAgentChange, session
     // slash-prefixed token with no whitespace (i.e. user is still typing the
     // skill name). Hand off to args mode the moment a space appears or the
     // slash leaves position 0.
-    if (onSlashCommand && /^\/[^\s]*$/.test(newValue)) {
-      const query = newValue.slice(1);
+    if (onSlashCommand && isSlashCommandToken(newValue)) {
+      const query = slashQuery(newValue);
       if (!slashState) {
         setSlashState({ query });
       } else if (slashState.query !== query) {
@@ -496,7 +493,7 @@ export function ChatInput({ disabled, projectId, agentId, onAgentChange, session
 
   function onKeyDown(e: KeyboardEvent<HTMLTextAreaElement>) {
     if (mentionState?.open) return;
-    // SkillSlashCommand owns Arrow/Enter/Tab/Esc via a document listener; let
+    // SlashCommandPicker owns Arrow/Enter/Tab/Esc via a document listener; let
     // it consume them so the textarea doesn't also submit on Enter.
     if (slashState) return;
     // IME safety: never act on Enter while an IME composition is in flight
@@ -658,12 +655,13 @@ export function ChatInput({ disabled, projectId, agentId, onAgentChange, session
         />
       )}
       {slashState && (
-        <SkillSlashCommand
+        <SlashCommandPicker
           query={slashState.query}
-          skills={skills}
+          items={skills}
           inputRef={textareaRef}
           onSelect={handleSlashSelect}
           onClose={() => setSlashState(null)}
+          emptyLabel="No skills available"
         />
       )}
     </div>

apps/web/src/components/ChatTabBar.tsx

@@ -183,13 +183,13 @@ export function ChatTabBar({
           </DropdownMenuTrigger>
           <DropdownMenuContent align="end" className="min-w-40">
             <DropdownMenuItem onSelect={() => onAddPane('chat')}>
-              <MessageSquare size={14} /> New chat
+              <MessageSquare size={14} /> New BooChat
             </DropdownMenuItem>
             <DropdownMenuItem onSelect={() => onAddPane('terminal')}>
-              <Terminal size={14} /> New terminal
+              <Terminal size={14} /> New BooTerm
             </DropdownMenuItem>
             <DropdownMenuItem onSelect={() => onAddPane('coder')}>
-              <Code size={14} /> New coder
+              <Code size={14} /> New BooCode
             </DropdownMenuItem>
           </DropdownMenuContent>
         </DropdownMenu>

apps/web/src/components/MessageBubble.tsx

@@ -14,6 +14,7 @@ import {
   ContextMenu,
   ContextMenuContent,
   ContextMenuItem,
+  ContextMenuSeparator,
   ContextMenuSub,
   ContextMenuSubContent,
   ContextMenuSubTrigger,
@@ -37,14 +38,15 @@ function useTerminals(): TerminalRegistration[] {
   return list;
 }
 
-// Wrap a message body with a right-click context menu offering "Send to
-// terminal → <pane name>". The submenu is disabled when nothing is selected
-// or no terminal panes are open; clicking a target emits a sendToTerminal
-// event that TerminalPane subscribes to (filtered by pane_id).
+// Wrap a message body with a right-click context menu offering Copy and
+// "Send to terminal → <pane name>". Send is disabled when nothing is
+// selected or no terminal panes are open; clicking a target emits a
+// sendToTerminal event that TerminalPane subscribes to (filtered by pane_id).
 function SendToTerminalMenu({ children }: { children: ReactNode }) {
   const [selection, setSelection] = useState('');
   const terminals = useTerminals();
-  const canSend = selection.length > 0 && terminals.length > 0;
+  const hasSelection = selection.length > 0;
+  const canSend = hasSelection && terminals.length > 0;
 
   return (
     <ContextMenu
@@ -57,6 +59,17 @@ function SendToTerminalMenu({ children }: { children: ReactNode }) {
     >
       <ContextMenuTrigger asChild>{children}</ContextMenuTrigger>
       <ContextMenuContent>
+        <ContextMenuItem
+          disabled={!hasSelection}
+          onSelect={() => {
+            void navigator.clipboard.writeText(selection).catch((err) => {
+              toast.error(err instanceof Error ? err.message : 'copy failed');
+            });
+          }}
+        >
+          Copy
+        </ContextMenuItem>
+        <ContextMenuSeparator />
         <ContextMenuSub>
           <ContextMenuSubTrigger disabled={!canSend}>Send to terminal</ContextMenuSubTrigger>
           <ContextMenuSubContent>

apps/web/src/components/MessageList.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useRef } from 'react';
+import { useCallback, useEffect, useMemo, useRef } from 'react';
 import type { Chat, Message } from '@/api/types';
 import { MessageBubble } from './MessageBubble';
 import { ToolCallGroup } from './ToolCallGroup';
@@ -142,13 +142,26 @@ function stampCapHits(items: RenderItem[]): RenderItem[] {
   });
 }
 
+const SCROLL_THRESHOLD_PX = 150;
+
 export function MessageList({ messages, sessionChats }: Props) {
   const endRef = useRef<HTMLDivElement>(null);
+  const scrollContainerRef = useRef<HTMLDivElement>(null);
+  const isNearBottomRef = useRef(true);
 
   const renderItems = useMemo(() => stampCapHits(group(flatten(messages))), [messages]);
 
+  const handleScroll = useCallback(() => {
+    const el = scrollContainerRef.current;
+    if (!el) return;
+    isNearBottomRef.current =
+      el.scrollHeight - el.scrollTop - el.clientHeight < SCROLL_THRESHOLD_PX;
+  }, []);
+
   useEffect(() => {
-    endRef.current?.scrollIntoView({ block: 'end' });
+    if (isNearBottomRef.current) {
+      endRef.current?.scrollIntoView({ block: 'end' });
+    }
   }, [messages]);
 
   if (messages.length === 0) {
@@ -160,7 +173,7 @@ export function MessageList({ messages, sessionChats }: Props) {
   }
 
   return (
-    <div className="flex-1 overflow-y-auto">
+    <div className="flex-1 overflow-y-auto" ref={scrollContainerRef} onScroll={handleScroll}>
       <div className="max-w-[1000px] mx-auto w-full px-6 py-4 space-y-4">
         {renderItems.map((item) => {
           if (item.kind === 'message') {

apps/web/src/components/NewPaneMenu.tsx

@@ -29,13 +29,13 @@ export function NewPaneMenu({ onAddPane, disabled }: Props) {
       </DropdownMenuTrigger>
       <DropdownMenuContent align="end">
         <DropdownMenuItem onSelect={() => onAddPane('chat')}>
-          <MessageSquare size={14} /> New chat
+          <MessageSquare size={14} /> New BooChat
         </DropdownMenuItem>
         <DropdownMenuItem onSelect={() => onAddPane('terminal')}>
-          <Terminal size={14} /> New terminal
+          <Terminal size={14} /> New BooTerm
         </DropdownMenuItem>
         <DropdownMenuItem onSelect={() => onAddPane('coder')}>
-          <Code size={14} /> New coder
+          <Code size={14} /> New BooCode
         </DropdownMenuItem>
       </DropdownMenuContent>
     </DropdownMenu>

apps/web/src/components/PermissionCard.tsx

@@ -0,0 +1,49 @@
+import { ShieldAlert } from 'lucide-react';
+import type { PermissionPrompt } from '@/api/types';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  prompt: PermissionPrompt;
+  onRespond: (optionId: string | null) => void;
+  busy?: boolean;
+}
+
+export function PermissionCard({ prompt, onRespond, busy }: Props) {
+  return (
+    <div className="mx-3 my-2 rounded-md border border-amber-500/40 bg-amber-500/10 px-3 py-2 text-sm">
+      <div className="flex items-start gap-2">
+        <ShieldAlert className="size-4 text-amber-600 shrink-0 mt-0.5" />
+        <div className="flex-1 min-w-0">
+          <p className="font-medium text-foreground">Permission required</p>
+          {prompt.toolTitle && (
+            <p className="text-xs text-muted-foreground mt-0.5 truncate">{prompt.toolTitle}</p>
+          )}
+          <div className="flex flex-wrap gap-2 mt-2">
+            {prompt.options.map((opt) => (
+              <button
+                key={opt.optionId}
+                type="button"
+                disabled={busy}
+                onClick={() => onRespond(opt.optionId)}
+                className={cn(
+                  'rounded-md border border-input bg-background px-2.5 py-1 text-xs hover:bg-accent',
+                  'max-md:min-h-[44px] disabled:opacity-40',
+                )}
+              >
+                {opt.label}
+              </button>
+            ))}
+            <button
+              type="button"
+              disabled={busy}
+              onClick={() => onRespond(null)}
+              className="rounded-md border border-destructive/40 px-2.5 py-1 text-xs text-destructive hover:bg-destructive/10 max-md:min-h-[44px] disabled:opacity-40"
+            >
+              Deny
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}

apps/web/src/components/ProjectSidebar.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useMemo, useRef, useState } from 'react';
 import { NavLink, useLocation, useNavigate } from 'react-router-dom';
-import { ChevronRight, ExternalLink, Folder, MessageSquare, Plus, Settings as SettingsIcon, X } from 'lucide-react';
+import { ChevronRight, ExternalLink, Folder, MessageSquare, Plus, Settings as SettingsIcon, X, Code } from 'lucide-react';
 import { toast } from 'sonner';
 import { Button } from '@/components/ui/button';
 import { sessionEvents } from '@/hooks/sessionEvents';
@@ -26,6 +26,7 @@ import { useViewport } from '@/hooks/useViewport';
 import { usePullToRefresh } from '@/hooks/usePullToRefresh';
 import type { SidebarProject } from '@/api/types';
 import { giteaUrlFor } from '@/lib/projectUrls';
+import { isCoderSessionName } from '@/lib/coder-session';
 import { cn } from '@/lib/utils';
 
 const EXPANDED_KEY = 'boocode.sidebar.expanded';
@@ -382,7 +383,11 @@ export function ProjectSidebar() {
                               to={`/session/${s.id}`}
                               className={`flex items-center gap-2 rounded-md px-2 py-1 text-sm min-w-0 ${rowCls(activeSession === s.id)}`}
                             >
-                              <MessageSquare className="size-3.5 shrink-0 opacity-70" />
+                              {isCoderSessionName(s.name) ? (
+                                <Code className="size-3.5 shrink-0 opacity-70" />
+                              ) : (
+                                <MessageSquare className="size-3.5 shrink-0 opacity-70" />
+                              )}
                               <span className="truncate flex-1" title={s.name}>{s.name}</span>
                               <span className="text-xs text-muted-foreground shrink-0 tabular-nums">
                                 {relTime(s.updated_at)}

apps/web/src/components/SkillSlashCommand.tsx

@@ -1,221 +0,0 @@
-import { useEffect, useMemo, useRef, useState } from 'react';
-import type { CSSProperties, RefObject } from 'react';
-import { createPortal } from 'react-dom';
-import { cn } from '@/lib/utils';
-import type { Skill } from '@/api/types';
-
-interface Props {
-  query: string;
-  skills: Skill[];
-  // v1.12 CP7.5: was `anchorRect: {top, left}` (snapshot at open time). Now a
-  // live ref so the dropdown can re-stat the input on visualViewport events —
-  // critical on iOS where the keyboard shifts the visual viewport and the
-  // dropdown would otherwise sit in the wrong place (often hidden).
-  inputRef: RefObject<HTMLElement | null>;
-  onSelect: (skillName: string) => void;
-  onClose: () => void;
-}
-
-// max-h-[320px] on the popover — use as the height budget for above/below
-// fit decisions. Slightly under-estimates when the list is short, but the
-// only consequence is we sometimes flip below when we'd fit above; no UX
-// breakage either way.
-const DROPDOWN_HEIGHT_BUDGET = 320;
-
-// Batch 9.6: slash-command dropdown. Models FileMentionPopover's pattern —
-// fixed-positioned popover, keyboard nav, click-outside-to-close. shadcn
-// `Command` (cmdk) isn't installed in this project; per the addendum we use
-// a plain div + Tailwind instead of pulling a new primitive autonomously.
-//
-// v1.12 CP7.5: portalled to document.body (escapes transformed/will-change
-// ancestor stacking contexts that hid the popover inside ChatInput on iOS)
-// + visualViewport-aware positioning (handles keyboard open/close + the iOS
-// "shift layout to keep input visible" auto-scroll).
-
-// Case-insensitive prefix match on `name` only. Description is display-only
-// in v1 (substring search across description is deferred to a polish batch).
-function filterByPrefix(skills: Skill[], query: string): Skill[] {
-  const q = query.toLowerCase();
-  const filtered = q
-    ? skills.filter((s) => s.name.toLowerCase().startsWith(q))
-    : skills;
-  // Stable alphabetical ordering matches the server's cache order (skills.ts
-  // sorts on name asc) but we re-sort here so a stale client cache doesn't
-  // surprise the user.
-  return [...filtered].sort((a, b) => a.name.localeCompare(b.name));
-}
-
-export function SkillSlashCommand({ query, skills, inputRef, onSelect, onClose }: Props) {
-  const [highlightIndex, setHighlightIndex] = useState(0);
-  const popoverRef = useRef<HTMLDivElement>(null);
-  const filtered = useMemo(() => filterByPrefix(skills, query), [skills, query]);
-
-  // Anchor + viewport tracking. `rect` is the input's bounding rect in layout
-  // viewport coords. `vvTick` forces a re-render whenever visualViewport
-  // changes even if the rect itself didn't (e.g. user scrolled the visual
-  // viewport without the input moving in layout space).
-  const [rect, setRect] = useState<DOMRect | null>(
-    () => inputRef.current?.getBoundingClientRect() ?? null,
-  );
-  const [vvTick, setVvTick] = useState(0);
-
-  useEffect(() => { setHighlightIndex(0); }, [query]);
-
-  // v1.12 CP7.5: recalc on viewport changes. iOS Safari fires
-  // visualViewport.resize when the soft keyboard opens/closes; .scroll fires
-  // when the page is shifted to keep the focused input visible above the
-  // keyboard. Both events should trigger a position recompute.
-  useEffect(() => {
-    function recalc() {
-      setRect(inputRef.current?.getBoundingClientRect() ?? null);
-      setVvTick((t) => t + 1);
-    }
-    recalc();
-    const vv = window.visualViewport;
-    vv?.addEventListener('resize', recalc);
-    vv?.addEventListener('scroll', recalc);
-    window.addEventListener('resize', recalc);
-    return () => {
-      vv?.removeEventListener('resize', recalc);
-      vv?.removeEventListener('scroll', recalc);
-      window.removeEventListener('resize', recalc);
-    };
-  }, [inputRef]);
-
-  // Arrow / Enter / Tab / Escape. Bound on document so keystrokes from the
-  // textarea reach the popover even though focus stays in the textarea.
-  useEffect(() => {
-    function handleKeyDown(e: KeyboardEvent) {
-      if (e.key === 'ArrowDown') {
-        e.preventDefault();
-        setHighlightIndex((prev) => (prev < filtered.length - 1 ? prev + 1 : 0));
-      } else if (e.key === 'ArrowUp') {
-        e.preventDefault();
-        setHighlightIndex((prev) => (prev > 0 ? prev - 1 : filtered.length - 1));
-      } else if (e.key === 'Enter' || e.key === 'Tab') {
-        if (filtered.length === 0) return;
-        e.preventDefault();
-        const target = filtered[highlightIndex] ?? filtered[0];
-        if (target) onSelect(target.name);
-      } else if (e.key === 'Escape') {
-        e.preventDefault();
-        onClose();
-      }
-    }
-    document.addEventListener('keydown', handleKeyDown);
-    return () => document.removeEventListener('keydown', handleKeyDown);
-  }, [filtered, highlightIndex, onSelect, onClose]);
-
-  useEffect(() => {
-    function handleMouseDown(e: MouseEvent) {
-      if (popoverRef.current && !popoverRef.current.contains(e.target as Node)) {
-        onClose();
-      }
-    }
-    document.addEventListener('mousedown', handleMouseDown);
-    return () => document.removeEventListener('mousedown', handleMouseDown);
-  }, [onClose]);
-
-  useEffect(() => {
-    const el = popoverRef.current?.querySelector('[data-highlighted="true"]');
-    if (el) el.scrollIntoView({ block: 'nearest' });
-  }, [highlightIndex]);
-
-  // v1.12 CP7.5: visualViewport-corrected positioning. getBoundingClientRect
-  // returns layout-viewport coords; iOS Safari's `position: fixed` positions
-  // relative to the layout viewport too — but the visible area can be offset
-  // (vv.offsetTop/offsetLeft) when iOS scrolls the input above the keyboard.
-  // Subtracting the vv offsets keeps the dropdown locked to the input's
-  // visual position. vvTick is in the dep list to force recompute on
-  // visualViewport events even when the rect itself didn't change.
-  //
-  // Default: position above the input (matches original UX). Flip below if
-  // above doesn't fit (input too close to top of visible viewport). When
-  // below would overlap the keyboard, cap top so the dropdown stays visible.
-  const style = useMemo<CSSProperties>(() => {
-    if (!rect) return { display: 'none' };
-    const vv = window.visualViewport;
-    const vvOffsetTop = vv?.offsetTop ?? 0;
-    const vvOffsetLeft = vv?.offsetLeft ?? 0;
-    const vvHeight = vv?.height ?? window.innerHeight;
-
-    const anchorTop = rect.top - vvOffsetTop;
-    const anchorBottom = rect.bottom - vvOffsetTop;
-    const left = rect.left - vvOffsetLeft;
-
-    const fitsAbove = anchorTop >= DROPDOWN_HEIGHT_BUDGET;
-    if (fitsAbove) {
-      // translate(-100%) on Y so the dropdown grows upward from anchorTop.
-      return {
-        position: 'fixed',
-        top: anchorTop,
-        left,
-        transform: 'translateY(-100%)',
-      };
-    }
-    // Render below; clamp so the bottom edge stays inside the visible viewport.
-    const maxTop = Math.max(0, vvHeight - DROPDOWN_HEIGHT_BUDGET);
-    return {
-      position: 'fixed',
-      top: Math.min(anchorBottom, maxTop),
-      left,
-    };
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [rect, vvTick]);
-
-  const popover = filtered.length === 0 ? (
-    <div
-      ref={popoverRef}
-      className="z-50 bg-popover border border-border rounded-md shadow min-w-[320px] p-2"
-      style={style}
-    >
-      <div className="text-xs text-muted-foreground px-2 py-1">
-        {query ? `No skill starts with "/${query}"` : 'No skills available'}
-      </div>
-    </div>
-  ) : (
-    <div
-      ref={popoverRef}
-      className="z-50 bg-popover border border-border rounded-md shadow min-w-[320px] max-w-[420px] max-h-[320px] overflow-y-auto"
-      style={style}
-    >
-      {filtered.map((skill, i) => (
-        <button
-          key={skill.name}
-          type="button"
-          data-highlighted={i === highlightIndex}
-          className={cn(
-            'w-full text-left px-2.5 py-2 cursor-pointer block',
-            i === highlightIndex && 'bg-muted',
-          )}
-          onMouseEnter={() => setHighlightIndex(i)}
-          onMouseDown={(e) => {
-            // mousedown not click — click runs after blur/focus shuffles which
-            // can race with the textarea's onBlur close path.
-            e.preventDefault();
-            onSelect(skill.name);
-          }}
-        >
-          <div className="font-mono text-xs font-bold text-foreground">/{skill.name}</div>
-          <div
-            className="text-xs text-muted-foreground overflow-hidden"
-            style={{
-              display: '-webkit-box',
-              WebkitLineClamp: 2,
-              WebkitBoxOrient: 'vertical',
-            }}
-          >
-            {skill.description}
-          </div>
-        </button>
-      ))}
-    </div>
-  );
-
-  // v1.12 CP7.5: portal to document.body to escape ChatInput's stacking
-  // context. The original render-in-place rendered the dropdown inside the
-  // composer's transformed/will-change ancestor tree, which on iOS Safari +
-  // Vivaldi caused the popover to either disappear or sit at z-index 0
-  // behind the autofill toolbar. document.body has no transform ancestor.
-  return createPortal(popover, document.body);
-}

apps/web/src/components/SlashCommandPicker.tsx

@@ -0,0 +1,181 @@
+import { useEffect, useMemo, useRef, useState } from 'react';
+import type { CSSProperties, RefObject } from 'react';
+import { createPortal } from 'react-dom';
+import { cn } from '@/lib/utils';
+
+export interface SlashCommandItem {
+  name: string;
+  description?: string;
+}
+
+interface Props {
+  query: string;
+  items: SlashCommandItem[];
+  inputRef: RefObject<HTMLElement | null>;
+  onSelect: (name: string) => void;
+  onClose: () => void;
+  emptyLabel?: string;
+}
+
+const DROPDOWN_HEIGHT_BUDGET = 320;
+
+function filterByPrefix(items: SlashCommandItem[], query: string): SlashCommandItem[] {
+  const q = query.toLowerCase();
+  const filtered = q ? items.filter((s) => s.name.toLowerCase().startsWith(q)) : items;
+  return [...filtered].sort((a, b) => a.name.localeCompare(b.name));
+}
+
+export function SlashCommandPicker({
+  query,
+  items,
+  inputRef,
+  onSelect,
+  onClose,
+  emptyLabel = 'No commands available',
+}: Props) {
+  const [highlightIndex, setHighlightIndex] = useState(0);
+  const popoverRef = useRef<HTMLDivElement>(null);
+  const filtered = useMemo(() => filterByPrefix(items, query), [items, query]);
+
+  const [rect, setRect] = useState<DOMRect | null>(
+    () => inputRef.current?.getBoundingClientRect() ?? null,
+  );
+  const [vvTick, setVvTick] = useState(0);
+
+  useEffect(() => { setHighlightIndex(0); }, [query]);
+
+  useEffect(() => {
+    function recalc() {
+      setRect(inputRef.current?.getBoundingClientRect() ?? null);
+      setVvTick((t) => t + 1);
+    }
+    recalc();
+    const vv = window.visualViewport;
+    vv?.addEventListener('resize', recalc);
+    vv?.addEventListener('scroll', recalc);
+    window.addEventListener('resize', recalc);
+    return () => {
+      vv?.removeEventListener('resize', recalc);
+      vv?.removeEventListener('scroll', recalc);
+      window.removeEventListener('resize', recalc);
+    };
+  }, [inputRef]);
+
+  useEffect(() => {
+    function handleKeyDown(e: KeyboardEvent) {
+      if (e.key === 'ArrowDown') {
+        e.preventDefault();
+        setHighlightIndex((prev) => (prev < filtered.length - 1 ? prev + 1 : 0));
+      } else if (e.key === 'ArrowUp') {
+        e.preventDefault();
+        setHighlightIndex((prev) => (prev > 0 ? prev - 1 : filtered.length - 1));
+      } else if (e.key === 'Enter' || e.key === 'Tab') {
+        if (filtered.length === 0) return;
+        e.preventDefault();
+        const target = filtered[highlightIndex] ?? filtered[0];
+        if (target) onSelect(target.name);
+      } else if (e.key === 'Escape') {
+        e.preventDefault();
+        onClose();
+      }
+    }
+    document.addEventListener('keydown', handleKeyDown);
+    return () => document.removeEventListener('keydown', handleKeyDown);
+  }, [filtered, highlightIndex, onSelect, onClose]);
+
+  useEffect(() => {
+    function handleMouseDown(e: MouseEvent) {
+      if (popoverRef.current && !popoverRef.current.contains(e.target as Node)) {
+        onClose();
+      }
+    }
+    document.addEventListener('mousedown', handleMouseDown);
+    return () => document.removeEventListener('mousedown', handleMouseDown);
+  }, [onClose]);
+
+  useEffect(() => {
+    const el = popoverRef.current?.querySelector('[data-highlighted="true"]');
+    if (el) el.scrollIntoView({ block: 'nearest' });
+  }, [highlightIndex]);
+
+  const style = useMemo<CSSProperties>(() => {
+    if (!rect) return { display: 'none' };
+    const vv = window.visualViewport;
+    const vvOffsetTop = vv?.offsetTop ?? 0;
+    const vvHeight = vv?.height ?? window.innerHeight;
+    // Visible region in layout-viewport coords (what position:fixed uses)
+    const visibleTop = vvOffsetTop;
+    const visibleBottom = vvOffsetTop + vvHeight;
+
+    const spaceAbove = rect.top - visibleTop;
+    const spaceBelow = visibleBottom - rect.bottom;
+
+    if (spaceAbove >= Math.min(DROPDOWN_HEIGHT_BUDGET, spaceBelow)) {
+      // Place above: clamp to visible top
+      const popupTop = Math.max(visibleTop, rect.top - DROPDOWN_HEIGHT_BUDGET);
+      return {
+        position: 'fixed',
+        top: popupTop,
+        left: rect.left,
+        maxHeight: rect.top - popupTop,
+      };
+    }
+    // Place below: clamp to visible bottom
+    return {
+      position: 'fixed',
+      top: rect.bottom,
+      left: rect.left,
+      maxHeight: Math.min(DROPDOWN_HEIGHT_BUDGET, visibleBottom - rect.bottom),
+    };
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [rect, vvTick]);
+
+  const popover = filtered.length === 0 ? (
+    <div
+      ref={popoverRef}
+      className="z-50 bg-popover border border-border rounded-md shadow min-w-[320px] p-2"
+      style={style}
+    >
+      <div className="text-xs text-muted-foreground px-2 py-1">
+        {query ? `No command starts with "/${query}"` : emptyLabel}
+      </div>
+    </div>
+  ) : (
+    <div
+      ref={popoverRef}
+      className="z-50 bg-popover border border-border rounded-md shadow min-w-[320px] max-w-[420px] max-h-[320px] overflow-y-auto overscroll-contain touch-pan-y"
+      style={style}
+    >
+      {filtered.map((item, i) => (
+        <div
+          key={item.name}
+          role="option"
+          aria-selected={i === highlightIndex}
+          data-highlighted={i === highlightIndex}
+          className={cn(
+            'w-full text-left px-2.5 py-2 cursor-pointer block',
+            i === highlightIndex && 'bg-muted',
+          )}
+          onMouseEnter={() => setHighlightIndex(i)}
+          onClick={() => onSelect(item.name)}
+        >
+          <div className="font-mono text-xs font-bold text-foreground">/{item.name}</div>
+          {item.description && (
+            <div
+              className="text-xs text-muted-foreground overflow-hidden"
+              style={{
+                display: '-webkit-box',
+                WebkitLineClamp: 2,
+                WebkitBoxOrient: 'vertical',
+              }}
+            >
+              {item.description}
+            </div>
+          )}
+        </div>
+      ))}
+    </div>
+  );
+
+  return createPortal(popover, document.body);
+}

apps/web/src/components/Workspace.tsx

@@ -1,7 +1,7 @@
 import { useEffect, useMemo, useState } from 'react';
-import { PanelRight, MessageSquare, Terminal, Code, Clipboard, Plus, X } from 'lucide-react';
+import { MessageSquare, Terminal, Code, Clipboard, Plus, X } from 'lucide-react';
 import type { Chat, Project, Session, WorkspacePane } from '@/api/types';
-import { MAX_PANES, type UseWorkspacePanesResult } from '@/hooks/useWorkspacePanes';
+import { MAX_PANES, activePaneChatId, type UseWorkspacePanesResult } from '@/hooks/useWorkspacePanes';
 import type { UseSessionChatsResult } from '@/hooks/useSessionChats';
 import { useViewport } from '@/hooks/useViewport';
 import { terminalsRegistry } from '@/lib/events';
@@ -34,6 +34,8 @@ interface Props {
   // v1.9: passed through to SettingsPane when one is mounted in the grid.
   session: Session;
   project: Project | null;
+  /** New BooCode opens a fresh coder session; chat/terminal split in-place. */
+  onAddPane: (kind: 'chat' | 'terminal' | 'coder') => void;
 }
 
 export function Workspace({
@@ -45,6 +47,7 @@ export function Workspace({
   chatsHook,
   session,
   project,
+  onAddPane,
 }: Props) {
   const {
     panes,
@@ -59,6 +62,7 @@ export function Workspace({
     showLandingPage,
     addSplitPane,
     removePane,
+    isPaneChatPending,
     handlePaneDragStart,
     handlePaneDragOver,
     handlePaneDragLeave,
@@ -134,44 +138,11 @@ export function Workspace({
     return out;
   }, [panes]);
 
+  // Per-coder-pane WS connection (status dot lives in the pane header).
+  const [coderConnected, setCoderConnected] = useState<Record<string, boolean>>({});
+
   return (
     <div className="flex flex-col h-full min-h-0">
-      {!isMobile && (
-        <div className="flex items-center gap-2 border-b border-border bg-muted/20 px-3 py-1.5 shrink-0">
-          <DropdownMenu>
-            <DropdownMenuTrigger asChild>
-              <button
-                type="button"
-                // v1.9: settings panes excluded from the MAX cap (decision c).
-                disabled={panes.filter((p) => p.kind !== 'settings').length >= MAX_PANES}
-                className={cn(
-                  'flex items-center gap-1 text-xs px-2 py-1 rounded hover:bg-muted',
-                  panes.filter((p) => p.kind !== 'settings').length >= MAX_PANES &&
-                    'opacity-40 cursor-not-allowed hover:bg-transparent'
-                )}
-              >
-                <PanelRight size={14} />
-                Split
-              </button>
-            </DropdownMenuTrigger>
-            <DropdownMenuContent>
-              <DropdownMenuItem onSelect={() => addSplitPane('chat')}>
-                <MessageSquare size={14} /> Chat
-              </DropdownMenuItem>
-              <DropdownMenuItem onSelect={() => addSplitPane('terminal')}>
-                <Terminal size={14} /> Terminal
-              </DropdownMenuItem>
-              <DropdownMenuItem onSelect={() => addSplitPane('coder')}>
-                <Code size={14} /> Coder
-              </DropdownMenuItem>
-            </DropdownMenuContent>
-          </DropdownMenu>
-        </div>
-      )}
-
-      {/* v1.8: mobile multi-pane SwipeablePaneTab strip removed; the header
-          pill (MobileTabSwitcher) is the mobile pane switcher. */}
-
       <div
         className={cn('flex-1 min-h-0', isMobile ? 'flex' : 'grid')}
         style={
@@ -185,6 +156,7 @@ export function Workspace({
         {panes.map((pane, idx) => {
           const isSettings = pane.kind === 'settings';
           const isTerminal = pane.kind === 'terminal';
+          const isCoder = pane.kind === 'coder';
           const isArtifact = pane.kind === 'markdown_artifact' || pane.kind === 'html_artifact';
           // v1.9: when maximized, hide every pane except the settings one.
           // display:none keeps the React tree mounted so streams / drafts
@@ -197,9 +169,8 @@ export function Workspace({
             }
             return null;
           }
-          // Terminal panes own their tab strip (no chats, no ChatTabBar) and
-          // are not drag-reorderable for now — keeps the layout grid simple.
-          const isChromeless = isSettings || isTerminal || isArtifact;
+          // Terminal + coder panes own their tab strip (no chats, no ChatTabBar).
+          const isChromeless = isSettings || isTerminal || isCoder || isArtifact;
           return (
           <div
             key={pane.id}
@@ -233,13 +204,66 @@ export function Workspace({
                   onCloseAll={() => closeAllTabs(idx)}
                   onAddPane={(kind) => {
                     if (kind === 'chat') void createChat(idx);
-                    else addSplitPane(kind);
+                    else onAddPane(kind);
                   }}
                   onShowHistory={() => showLandingPage(idx)}
                   onRename={renameChat}
                   onRemovePane={panes.length > 1 ? () => removePane(idx) : undefined}
                 />
               )}
+              {isCoder && (
+                <div className="flex items-center gap-2 border-b border-border bg-muted/30 px-2 py-1 shrink-0">
+                  <Code size={12} className="text-muted-foreground" />
+                  <span className="text-xs text-muted-foreground">BooCode</span>
+                  <div className="ml-auto flex items-center gap-1.5">
+                    <DropdownMenu>
+                      <DropdownMenuTrigger asChild>
+                        <button
+                          type="button"
+                          onClick={(e) => e.stopPropagation()}
+                          className="inline-flex items-center justify-center size-5 rounded text-muted-foreground hover:bg-muted hover:text-foreground max-md:size-7"
+                          aria-label="New pane"
+                          title="New pane"
+                        >
+                          <Plus size={12} />
+                        </button>
+                      </DropdownMenuTrigger>
+                      <DropdownMenuContent align="end" className="min-w-40">
+                        <DropdownMenuItem onSelect={() => onAddPane('chat')}>
+                          <MessageSquare size={14} /> New BooChat
+                        </DropdownMenuItem>
+                        <DropdownMenuItem onSelect={() => onAddPane('terminal')}>
+                          <Terminal size={14} /> New BooTerm
+                        </DropdownMenuItem>
+                        <DropdownMenuItem onSelect={() => onAddPane('coder')}>
+                          <Code size={14} /> New BooCode
+                        </DropdownMenuItem>
+                      </DropdownMenuContent>
+                    </DropdownMenu>
+                    <span
+                      className={cn(
+                        'inline-block w-1.5 h-1.5 rounded-full shrink-0',
+                        coderConnected[pane.id] ? 'bg-green-500' : 'bg-red-500',
+                      )}
+                      title={coderConnected[pane.id] ? 'Connected' : 'Disconnected'}
+                    />
+                    {panes.length > 1 && (
+                      <button
+                        type="button"
+                        onClick={(e) => {
+                          e.stopPropagation();
+                          removePane(idx);
+                        }}
+                        className="inline-flex items-center justify-center size-5 rounded text-muted-foreground hover:bg-muted hover:text-foreground max-md:size-7"
+                        aria-label="Close BooCode pane"
+                        title="Close BooCode pane"
+                      >
+                        <X size={12} />
+                      </button>
+                    )}
+                  </div>
+                </div>
+              )}
               {isTerminal && (
                 <div className="flex items-center gap-2 border-b border-border bg-muted/30 px-2 py-1 shrink-0">
                   <Terminal size={12} className="text-muted-foreground" />
@@ -259,14 +283,14 @@ export function Workspace({
                       </button>
                     </DropdownMenuTrigger>
                     <DropdownMenuContent align="end" className="min-w-40">
-                      <DropdownMenuItem onSelect={() => addSplitPane('chat')}>
-                        <MessageSquare size={14} /> New chat
+                      <DropdownMenuItem onSelect={() => onAddPane('chat')}>
+                        <MessageSquare size={14} /> New BooChat
                       </DropdownMenuItem>
-                      <DropdownMenuItem onSelect={() => addSplitPane('terminal')}>
-                        <Terminal size={14} /> New terminal
+                      <DropdownMenuItem onSelect={() => onAddPane('terminal')}>
+                        <Terminal size={14} /> New BooTerm
                       </DropdownMenuItem>
-                      <DropdownMenuItem onSelect={() => addSplitPane('coder')}>
-                        <Code size={14} /> New coder
+                      <DropdownMenuItem onSelect={() => onAddPane('coder')}>
+                        <Code size={14} /> New BooCode
                       </DropdownMenuItem>
                     </DropdownMenuContent>
                   </DropdownMenu>
@@ -323,7 +347,18 @@ export function Workspace({
                   active={idx === activePaneIdx}
                 />
               ) : pane.kind === 'coder' ? (
-                <CoderPane sessionId={sessionId} />
+                <CoderPane
+                  sessionId={sessionId}
+                  paneId={pane.id}
+                  chatId={activePaneChatId(pane)}
+                  chatPending={isPaneChatPending(pane.id)}
+                  projectPath={project?.path}
+                  onConnectedChange={(connected) =>
+                    setCoderConnected((prev) =>
+                      prev[pane.id] === connected ? prev : { ...prev, [pane.id]: connected },
+                    )
+                  }
+                />
               ) : pane.kind === 'markdown_artifact' && pane.markdown_artifact_state ? (
                 <MarkdownArtifactPane
                   chatId={pane.markdown_artifact_state.chat_id}

apps/web/src/components/panes/CoderMessageList.tsx

@@ -0,0 +1,228 @@
+import { useCallback, useEffect, useMemo, useRef, type ReactNode } from 'react';
+import { MarkdownRenderer } from '@/components/MarkdownRenderer';
+import { ToolCallGroup } from '@/components/ToolCallGroup';
+import { ToolCallLine, type ToolRun } from '@/components/ToolCallLine';
+import { wireToolCallToRun, type CoderToolCallWire } from '@/lib/coder-tools';
+
+export interface CoderMessageWire {
+  id: string;
+  role: 'user' | 'assistant' | 'system';
+  content: string;
+  status?: 'streaming' | 'complete' | 'failed';
+  reasoning_text?: string;
+  tool_calls?: CoderToolCallWire[];
+}
+
+export interface CoderToolMessageWire {
+  id: string;
+  role: 'tool';
+  tool_results: {
+    tool_call_id: string;
+    output: unknown;
+    truncated?: boolean;
+    error?: string;
+  };
+}
+
+export type CoderTimelineWire = CoderMessageWire | CoderToolMessageWire;
+
+function isToolMessage(m: CoderTimelineWire): m is CoderToolMessageWire {
+  return m.role === 'tool';
+}
+
+type RenderItem =
+  | { kind: 'message'; message: CoderMessageWire }
+  | { kind: 'tool_run'; run: ToolRun; key: string }
+  | { kind: 'tool_group'; runs: ToolRun[]; key: string };
+
+const GROUP_THRESHOLD = 3;
+const SCROLL_THRESHOLD_PX = 150;
+
+function flattenCoderMessages(messages: CoderTimelineWire[]): RenderItem[] {
+  const items: RenderItem[] = [];
+  const runsByCallId = new Map<string, ToolRun>();
+
+  for (const m of messages) {
+    if (isToolMessage(m)) {
+      const run = runsByCallId.get(m.tool_results.tool_call_id);
+      if (run) {
+        run.result = {
+          tool_call_id: m.tool_results.tool_call_id,
+          output: m.tool_results.output,
+          truncated: m.tool_results.truncated ?? false,
+          ...(m.tool_results.error ? { error: m.tool_results.error } : {}),
+        };
+      }
+      continue;
+    }
+
+    if (m.role === 'user' || m.role === 'system') {
+      items.push({ kind: 'message', message: m });
+      continue;
+    }
+
+    const hasToolCalls = (m.tool_calls?.length ?? 0) > 0;
+    const hasText = m.content.trim().length > 0;
+    const hasReasoning = (m.reasoning_text?.trim().length ?? 0) > 0;
+    // External agents persist tool calls + final answer on one row. Render tools
+    // before the answer text so the timeline matches BooChat (tools, then reply).
+    const externalCombined = hasToolCalls && (hasText || hasReasoning);
+
+    if (externalCombined) {
+      if (hasReasoning) {
+        items.push({
+          kind: 'message',
+          message: { ...m, content: '', reasoning_text: m.reasoning_text },
+        });
+      }
+      for (const tc of m.tool_calls!) {
+        const run = wireToolCallToRun(tc);
+        runsByCallId.set(tc.id, run);
+        items.push({ kind: 'tool_run', run, key: tc.id });
+      }
+      if (hasText || m.status === 'streaming') {
+        items.push({
+          kind: 'message',
+          message: { ...m, reasoning_text: undefined },
+        });
+      }
+      continue;
+    }
+
+    // Native inference: separate assistant rows per step — mirror MessageList.
+    if (hasText || hasReasoning || m.status === 'streaming') {
+      items.push({ kind: 'message', message: m });
+    }
+    if (hasToolCalls) {
+      for (const tc of m.tool_calls!) {
+        const run = wireToolCallToRun(tc);
+        runsByCallId.set(tc.id, run);
+        items.push({ kind: 'tool_run', run, key: tc.id });
+      }
+    }
+  }
+
+  return items;
+}
+
+function groupToolRuns(items: RenderItem[]): RenderItem[] {
+  const out: RenderItem[] = [];
+  let i = 0;
+  while (i < items.length) {
+    const item = items[i]!;
+    if (item.kind !== 'tool_run') {
+      out.push(item);
+      i += 1;
+      continue;
+    }
+    const name = item.run.call.name;
+    let j = i + 1;
+    while (
+      j < items.length &&
+      items[j]!.kind === 'tool_run' &&
+      (items[j] as { kind: 'tool_run'; run: ToolRun }).run.call.name === name
+    ) {
+      j += 1;
+    }
+    const run = items.slice(i, j) as Array<{ kind: 'tool_run'; run: ToolRun; key: string }>;
+    if (run.length >= GROUP_THRESHOLD) {
+      out.push({ kind: 'tool_group', runs: run.map((r) => r.run), key: `group-${run[0]!.key}` });
+    } else {
+      for (const r of run) out.push(r);
+    }
+    i = j;
+  }
+  return out;
+}
+
+function CoderTextBubble({ message }: { message: CoderMessageWire }) {
+  const isUser = message.role === 'user';
+  const isStreaming = message.status === 'streaming';
+  const hasText = message.content.trim().length > 0;
+  const hasReasoning = (message.reasoning_text?.trim().length ?? 0) > 0;
+
+  if (isUser) {
+    return (
+      <div className="flex flex-col items-end gap-1">
+        <div className="max-w-[80%] rounded-lg bg-primary text-primary-foreground px-3 py-2 text-sm whitespace-pre-wrap break-words min-w-0">
+          {message.content}
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex flex-col gap-2">
+      {hasReasoning && (
+        <details className="rounded border border-border/40 bg-muted/20 px-2 py-1">
+          <summary className="cursor-pointer text-xs text-muted-foreground select-none">Reasoning</summary>
+          <pre className="mt-1 max-h-48 overflow-y-auto whitespace-pre-wrap text-[11px] text-muted-foreground font-mono">
+            {message.reasoning_text}
+          </pre>
+        </details>
+      )}
+      {(hasText || (isStreaming && !hasReasoning)) && (
+        <div className="max-w-[90%] text-sm leading-relaxed space-y-2 break-words min-w-0">
+          {hasText ? <MarkdownRenderer content={message.content} /> : null}
+          {isStreaming && (
+            <span className="inline-block w-1.5 h-3.5 align-baseline bg-muted-foreground/60 animate-pulse" />
+          )}
+        </div>
+      )}
+      {message.status === 'failed' && (
+        <div className="text-xs text-destructive">message failed</div>
+      )}
+    </div>
+  );
+}
+
+interface Props {
+  messages: CoderTimelineWire[];
+  footer?: ReactNode;
+}
+
+export function CoderMessageList({ messages, footer }: Props) {
+  const endRef = useRef<HTMLDivElement>(null);
+  const scrollRef = useRef<HTMLDivElement>(null);
+  const isNearBottomRef = useRef(true);
+
+  const renderItems = useMemo(
+    () => groupToolRuns(flattenCoderMessages(messages)),
+    [messages],
+  );
+
+  const handleScroll = useCallback(() => {
+    const el = scrollRef.current;
+    if (!el) return;
+    isNearBottomRef.current =
+      el.scrollHeight - el.scrollTop - el.clientHeight < SCROLL_THRESHOLD_PX;
+  }, []);
+
+  useEffect(() => {
+    if (isNearBottomRef.current) {
+      endRef.current?.scrollIntoView({ block: 'end' });
+    }
+  }, [messages]);
+
+  if (messages.length === 0) {
+    return null;
+  }
+
+  return (
+    <div className="flex-1 overflow-y-auto" ref={scrollRef} onScroll={handleScroll}>
+      <div className="max-w-[1000px] mx-auto w-full px-6 py-4 space-y-4">
+        {renderItems.map((item) => {
+          if (item.kind === 'message') {
+            return <CoderTextBubble key={item.message.id} message={item.message} />;
+          }
+          if (item.kind === 'tool_run') {
+            return <ToolCallLine key={item.key} run={item.run} />;
+          }
+          return <ToolCallGroup key={item.key} runs={item.runs} />;
+        })}
+        {footer}
+        <div ref={endRef} />
+      </div>
+    </div>
+  );
+}

apps/web/src/components/panes/CoderPane.tsx

@@ -1,15 +1,21 @@
-// v2.0.0: BooCoder pane — renders the BooCoder chat + diff interface inside
-// BooChat's multi-pane workspace.
+// BooCoder pane — chat + diff inside BooChat's multi-pane workspace.
 //
-// Architecture:
-// - REST calls go through /api/coder/* which BooChat's server proxies to
-//   the boocoder container at http://boocoder:3000/api/*
-// - WS connects directly to the boocoder container at :9502 (same Tailscale
-//   network, no CORS for WebSocket). In dev, the Vite proxy handles it.
+// REST: /api/coder/* proxied by BooChat to host boocoder.service (:9502).
+// WS: /api/coder/ws/sessions/:id (Vite dev proxies to :9502).
 
-import { useCallback, useEffect, useRef, useState } from 'react';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { Code, Send, Check, X, RefreshCw } from 'lucide-react';
-import { MarkdownRenderer } from '@/components/MarkdownRenderer';
+import { AgentComposerBar } from '@/components/AgentComposerBar';
+import { PermissionCard } from '@/components/PermissionCard';
+import { AgentCommandsHint } from '@/components/AgentCommandsHint';
+import { SlashCommandPicker } from '@/components/SlashCommandPicker';
+import { api } from '@/api/client';
+import type { AgentSessionConfig, PermissionPrompt, AgentCommand } from '@/api/types';
+import { useSkills } from '@/hooks/useSkills';
+import { toast } from 'sonner';
+import { isSlashCommandToken, mergeCommandsByName, parseSlashInput, slashQuery } from '@/lib/slash-command';
+import { mergeWireToolCall } from '@/lib/coder-tools';
+import { CoderMessageList, type CoderTimelineWire } from '@/components/panes/CoderMessageList';
 import { cn } from '@/lib/utils';
 
 // ---------------------------------------------------------------------------
@@ -21,16 +27,26 @@ interface CoderMessage {
   role: 'user' | 'assistant' | 'system';
   content: string;
   status?: 'streaming' | 'complete' | 'failed';
+  reasoning_text?: string;
   tool_calls?: Array<{
     id: string;
     function: { name: string; arguments: string };
   }>;
-  tool_results?: {
+}
+
+interface CoderToolMessage {
+  id: string;
+  role: 'tool';
+  tool_results: {
     tool_call_id: string;
-    content: string;
+    output: unknown;
+    truncated?: boolean;
+    error?: string;
   };
 }
 
+type CoderTimelineMessage = CoderMessage | CoderToolMessage;
+
 interface PendingChange {
   id: string;
   file_path: string;
@@ -42,24 +58,106 @@ interface PendingChange {
 
 interface Props {
   sessionId: string;
+  paneId: string;
+  chatId?: string;
+  chatPending?: boolean;
+  projectPath?: string;
+  onConnectedChange?: (connected: boolean) => void;
 }
 
-// ---------------------------------------------------------------------------
-// Hooks
-// ---------------------------------------------------------------------------
+interface WsHandlers {
+  onPermissionRequested?: (prompt: PermissionPrompt) => void;
+  onPermissionResolved?: (taskId: string) => void;
+  onAssistantComplete?: () => void;
+  onAgentCommands?: (taskId: string, commands: AgentCommand[]) => void;
+  onConnectedChange?: (connected: boolean) => void;
+}
 
-function useCoderMessages(sessionId: string) {
-  const [messages, setMessages] = useState<CoderMessage[]>([]);
+type RawCoderMessage = {
+  id: string;
+  role: string;
+  chat_id?: string;
+  content?: string | null;
+  status?: string | null;
+  reasoning_text?: string;
+  reasoning_parts?: Array<{ text?: string }> | null;
+  tool_results?: {
+    tool_call_id: string;
+    output: unknown;
+    truncated?: boolean;
+    error?: string;
+  } | null;
+  tool_calls?: Array<
+    | { id: string; name: string; args?: Record<string, unknown> }
+    | { id: string; function: { name: string; arguments: string } }
+  > | null;
+};
+
+function mapCoderTimelineRow(raw: RawCoderMessage): CoderTimelineMessage | null {
+  if (raw.role === 'tool') {
+    if (!raw.tool_results?.tool_call_id) return null;
+    return {
+      id: raw.id,
+      role: 'tool',
+      tool_results: raw.tool_results,
+    };
+  }
+  if (raw.role !== 'user' && raw.role !== 'assistant' && raw.role !== 'system') return null;
+  const tool_calls = raw.tool_calls?.map((tc) => {
+    if ('function' in tc) {
+      return { id: tc.id, function: tc.function };
+    }
+    return {
+      id: tc.id,
+      function: {
+        name: tc.name,
+        arguments: JSON.stringify(tc.args ?? {}),
+      },
+    };
+  });
+  const reasoning_text =
+    raw.reasoning_text ??
+    raw.reasoning_parts?.map((p) => p.text ?? '').join('') ??
+    '';
+  return {
+    id: raw.id,
+    role: raw.role as CoderMessage['role'],
+    content: raw.content ?? '',
+    status: (raw.status ?? 'complete') as CoderMessage['status'],
+    ...(reasoning_text ? { reasoning_text } : {}),
+    ...(tool_calls?.length ? { tool_calls } : {}),
+  };
+}
+
+function useCoderMessages(sessionId: string, chatId: string | undefined, handlers: WsHandlers) {
+  const [messages, setMessages] = useState<CoderTimelineMessage[]>([]);
   const [connected, setConnected] = useState(false);
   const wsRef = useRef<WebSocket | null>(null);
+  const handlersRef = useRef(handlers);
+  handlersRef.current = handlers;
+  const chatIdRef = useRef(chatId);
+  chatIdRef.current = chatId;
+
+  const loadMessages = useCallback(() => {
+    if (!chatId) {
+      setMessages([]);
+      return Promise.resolve();
+    }
+    return api.coder
+      .listMessages(sessionId, chatId)
+      .then((rows) =>
+        setMessages(
+          rows
+            .map(mapCoderTimelineRow)
+            .filter((m): m is CoderTimelineMessage => m !== null),
+        ),
+      )
+      .catch(() => {/* boocoder may be down */});
+  }, [sessionId, chatId]);
 
   useEffect(() => {
-    // Fetch existing messages on mount
-    fetch(`/api/coder/sessions/${sessionId}/messages`)
-      .then((res) => res.ok ? res.json() : [])
-      .then((data: CoderMessage[]) => setMessages(data))
-      .catch(() => {/* noop — coder backend may not be running */});
-  }, [sessionId]);
+    void loadMessages();
+  }, [loadMessages]);
 
   useEffect(() => {
     // WS connects to the coder backend. In production, this goes through the
@@ -76,38 +174,137 @@ function useCoderMessages(sessionId: string) {
     ws.onmessage = (ev) => {
       try {
         const frame = JSON.parse(ev.data as string);
-        if (frame.type === 'message_started') {
-          setMessages((prev) => [
-            ...prev,
-            { id: frame.message_id, role: frame.role ?? 'assistant', content: '', status: 'streaming' },
-          ]);
+        const scopedChatId = chatIdRef.current;
+        if (
+          scopedChatId &&
+          frame.chat_id &&
+          frame.chat_id !== scopedChatId &&
+          frame.type !== 'snapshot'
+        ) {
+          return;
+        }
+        if (frame.type === 'snapshot' && Array.isArray(frame.messages)) {
+          const rawMessages = (frame.messages as RawCoderMessage[]).filter(
+            (m) => !scopedChatId || m.chat_id === scopedChatId,
+          );
+          setMessages(
+            rawMessages
+              .map(mapCoderTimelineRow)
+              .filter((m): m is CoderTimelineMessage => m !== null),
+          );
+        } else if (frame.type === 'message_started') {
+          setMessages((prev) => {
+            if (prev.some((m) => m.id === frame.message_id)) return prev;
+            const role = frame.role ?? 'assistant';
+            const tempIdx =
+              role === 'user'
+                ? prev.findIndex((m) => m.id.startsWith('temp-') && m.role === 'user')
+                : -1;
+            if (tempIdx >= 0) {
+              return prev.map((m, i) =>
+                i === tempIdx ? { ...m, id: frame.message_id, status: 'streaming' } : m,
+              );
+            }
+            return [
+              ...prev,
+              { id: frame.message_id, role, content: '', status: 'streaming' },
+            ];
+          });
         } else if (frame.type === 'delta') {
           setMessages((prev) =>
-            prev.map((m) =>
-              m.id === frame.message_id
-                ? { ...m, content: m.content + (frame.content ?? '') }
-                : m
-            )
+            prev.map((m) => {
+              if (m.id !== frame.message_id || m.role === 'tool') return m;
+              const chunk = frame.content ?? '';
+              if (m.role === 'user') {
+                return { ...m, content: chunk || m.content };
+              }
+              return { ...m, content: m.content + chunk };
+            }),
           );
         } else if (frame.type === 'message_complete') {
-          setMessages((prev) =>
-            prev.map((m) =>
-              m.id === frame.message_id ? { ...m, status: 'complete' } : m
-            )
-          );
+          setMessages((prev) => {
+            const completed = prev.find(
+              (m): m is CoderMessage => m.id === frame.message_id && m.role === 'assistant',
+            );
+            const next = prev.map((m) =>
+              m.id === frame.message_id && m.role !== 'tool'
+                ? { ...m, status: 'complete' as const }
+                : m,
+            );
+            if (completed) {
+              queueMicrotask(() => handlersRef.current.onAssistantComplete?.());
+            }
+            return next;
+          });
         } else if (frame.type === 'tool_call') {
+          const tc = frame.tool_call as { id: string; name: string; args?: Record<string, unknown> } | undefined;
+          if (tc?.id) {
+            setMessages((prev) =>
+              prev.map((m) =>
+                m.role !== 'assistant' || m.id !== frame.message_id
+                  ? m
+                  : { ...m, tool_calls: mergeWireToolCall(m.tool_calls, { ...tc, args: tc.args ?? {} }) },
+              ),
+            );
+          }
+        } else if (frame.type === 'tool_result') {
+          setMessages((prev) => {
+            const exists = prev.some((m) => m.id === frame.tool_message_id);
+            if (exists) {
+              return prev.map((m) =>
+                m.role === 'tool' && m.id === frame.tool_message_id
+                  ? {
+                      ...m,
+                      tool_results: {
+                        tool_call_id: frame.tool_call_id,
+                        output: frame.output,
+                        truncated: frame.truncated,
+                        ...(frame.error ? { error: frame.error } : {}),
+                      },
+                    }
+                  : m,
+              );
+            }
+            return [
+              ...prev,
+              {
+                id: frame.tool_message_id,
+                role: 'tool' as const,
+                tool_results: {
+                  tool_call_id: frame.tool_call_id,
+                  output: frame.output,
+                  truncated: frame.truncated,
+                  ...(frame.error ? { error: frame.error } : {}),
+                },
+              },
+            ];
+          });
+        } else if (frame.type === 'reasoning_delta') {
           setMessages((prev) =>
             prev.map((m) =>
-              m.id === frame.message_id
-                ? {
-                    ...m,
-                    tool_calls: [
-                      ...(m.tool_calls ?? []),
-                      { id: frame.tool_call_id, function: { name: frame.name, arguments: frame.arguments ?? '' } },
-                    ],
-                  }
-                : m
-            )
+              m.id === frame.message_id && m.role === 'assistant'
+                ? { ...m, reasoning_text: (m.reasoning_text ?? '') + (frame.content ?? '') }
+                : m,
+            ),
+          );
+        } else if (frame.type === 'permission_requested') {
+          handlersRef.current.onPermissionRequested?.({
+            taskId: frame.task_id,
+            toolTitle: frame.tool_title,
+            options: (frame.options ?? []).map((o: { option_id: string; label: string }) => ({
+              optionId: o.option_id,
+              label: o.label,
+            })),
+          });
+        } else if (frame.type === 'permission_resolved') {
+          handlersRef.current.onPermissionResolved?.(frame.task_id);
+        } else if (frame.type === 'agent_commands') {
+          handlersRef.current.onAgentCommands?.(
+            frame.task_id,
+            (frame.commands ?? []).map((c: { name: string; description?: string }) => ({
+              name: c.name,
+              description: c.description,
+            })),
           );
         }
       } catch {
@@ -121,7 +318,11 @@ function useCoderMessages(sessionId: string) {
     };
   }, [sessionId]);
 
-  return { messages, setMessages, connected };
+  useEffect(() => {
+    handlersRef.current.onConnectedChange?.(connected);
+  }, [connected]);
+
+  return { messages, setMessages, connected, loadMessages };
 }
 
 function usePendingChanges(sessionId: string) {
@@ -164,48 +365,6 @@ function usePendingChanges(sessionId: string) {
 // Sub-components
 // ---------------------------------------------------------------------------
 
-function CoderMessageBubble({ message }: { message: CoderMessage }) {
-  const isUser = message.role === 'user';
-  return (
-    <div className={cn('flex flex-col gap-1 px-3 py-2', isUser ? 'items-end' : 'items-start')}>
-      <div
-        className={cn(
-          'rounded-lg px-3 py-2 max-w-[85%] text-sm',
-          isUser
-            ? 'bg-primary text-primary-foreground'
-            : 'bg-muted text-foreground'
-        )}
-      >
-        {isUser ? (
-          <p className="whitespace-pre-wrap">{message.content}</p>
-        ) : (
-          <div className="prose prose-sm dark:prose-invert max-w-none">
-            <MarkdownRenderer content={message.content} />
-          </div>
-        )}
-        {message.tool_calls && message.tool_calls.length > 0 && (
-          <div className="mt-2 border-t border-border/50 pt-2 space-y-1">
-            {message.tool_calls.map((tc) => (
-              <div key={tc.id} className="text-xs font-mono text-muted-foreground">
-                <span className="text-primary/70">{tc.function.name}</span>
-                {tc.function.arguments && (
-                  <span className="ml-1 opacity-60">
-                    ({tc.function.arguments.slice(0, 80)}
-                    {tc.function.arguments.length > 80 ? '...' : ''})
-                  </span>
-                )}
-              </div>
-            ))}
-          </div>
-        )}
-        {message.status === 'streaming' && (
-          <span className="inline-block w-2 h-4 bg-current opacity-60 animate-pulse ml-0.5" />
-        )}
-      </div>
-    </div>
-  );
-}
-
 function DiffPanel({
   changes,
   loading,
@@ -295,102 +454,272 @@ function DiffPanel({
 // Main component
 // ---------------------------------------------------------------------------
 
-export function CoderPane({ sessionId }: Props) {
-  const { messages, setMessages, connected } = useCoderMessages(sessionId);
+export function CoderPane({
+  sessionId,
+  paneId,
+  chatId,
+  chatPending = false,
+  projectPath,
+  onConnectedChange,
+}: Props) {
+  const [agentConfig, setAgentConfig] = useState<AgentSessionConfig>({
+    provider: 'boocode',
+    model: '',
+    modeId: null,
+    thinkingOptionId: null,
+  });
+  const [activeTaskId, setActiveTaskId] = useState<string | null>(null);
+  const [permissionPrompt, setPermissionPrompt] = useState<PermissionPrompt | null>(null);
+  const [permissionBusy, setPermissionBusy] = useState(false);
+  const [providerCommands, setProviderCommands] = useState<AgentCommand[]>([]);
+  const [liveTaskCommands, setLiveTaskCommands] = useState<AgentCommand[]>([]);
+  const { skills } = useSkills();
+  const [slashState, setSlashState] = useState<{ query: string } | null>(null);
+
+  const displayedCommands = useMemo(() => {
+    const base =
+      agentConfig.provider === 'boocode'
+        ? skills.map((s) => ({ name: s.name, description: s.description }))
+        : providerCommands;
+    return mergeCommandsByName(base, liveTaskCommands);
+  }, [agentConfig.provider, skills, providerCommands, liveTaskCommands]);
+
+  const skillsByName = useMemo(() => new Set(skills.map((s) => s.name)), [skills]);
+  const commandsByName = useMemo(
+    () => new Set(displayedCommands.map((c) => c.name)),
+    [displayedCommands],
+  );
+
+  const { messages, setMessages, connected, loadMessages } = useCoderMessages(sessionId, chatId, {
+    onConnectedChange,
+    onPermissionRequested: (prompt) => {
+      setActiveTaskId(prompt.taskId);
+      setPermissionPrompt(prompt);
+    },
+    onPermissionResolved: (taskId) => {
+      if (activeTaskId === taskId || permissionPrompt?.taskId === taskId) {
+        setPermissionPrompt(null);
+      }
+    },
+    onAssistantComplete: () => {
+      setActiveTaskId(null);
+      setPermissionPrompt(null);
+      setLiveTaskCommands([]);
+    },
+    onAgentCommands: (_taskId, commands) => {
+      setLiveTaskCommands(commands);
+    },
+  });
   const { changes, loading, refresh, approve, reject } = usePendingChanges(sessionId);
   const [input, setInput] = useState('');
   const [sending, setSending] = useState(false);
-  const messagesEndRef = useRef<HTMLDivElement>(null);
   const inputRef = useRef<HTMLTextAreaElement>(null);
 
-  // Auto-scroll on new messages
-  useEffect(() => {
-    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
-  }, [messages]);
-
   // Refresh pending changes when a message_complete arrives
   useEffect(() => {
-    const lastMsg = messages[messages.length - 1];
-    if (lastMsg?.role === 'assistant' && lastMsg.status === 'complete') {
+    const lastAssistant = [...messages].reverse().find(
+      (m): m is CoderMessage => m.role === 'assistant',
+    );
+    if (lastAssistant?.status === 'complete') {
       refresh();
     }
   }, [messages, refresh]);
 
+  // Poll fallbacks when WS is disconnected (reconnect uses WS as source of truth)
+  useEffect(() => {
+    if (!activeTaskId || connected) return;
+    const interval = setInterval(() => {
+      if (!permissionPrompt) {
+        void api.coder
+          .getTaskPermission(activeTaskId)
+          .then((prompt) => {
+            setPermissionPrompt({
+              taskId: prompt.taskId,
+              toolTitle: prompt.toolTitle,
+              options: prompt.options,
+            });
+          })
+          .catch(() => {/* no pending permission */});
+      }
+      void api.coder
+        .getTaskCommands(activeTaskId)
+        .then((res) => setLiveTaskCommands(res.commands))
+        .catch(() => {/* not cached yet */});
+      void api.coder
+        .getTask(activeTaskId)
+        .then((task) => {
+          if (task.state === 'running' || task.state === 'pending' || task.state === 'blocked') {
+            return;
+          }
+          setActiveTaskId(null);
+          setPermissionPrompt(null);
+          setLiveTaskCommands([]);
+          void loadMessages();
+        })
+        .catch(() => {/* task gone */});
+    }, 2000);
+    return () => clearInterval(interval);
+  }, [activeTaskId, connected, permissionPrompt, loadMessages]);
+
+  const handleProviderCommandsChange = useCallback((commands: AgentCommand[]) => {
+    setProviderCommands(commands);
+  }, []);
+
+  const handlePermissionRespond = useCallback(async (optionId: string | null) => {
+    if (!permissionPrompt) return;
+    setPermissionBusy(true);
+    try {
+      await api.coder.respondTaskPermission(permissionPrompt.taskId, optionId);
+      setPermissionPrompt(null);
+    } finally {
+      setPermissionBusy(false);
+    }
+  }, [permissionPrompt]);
+
   const handleSend = useCallback(async () => {
     const text = input.trim();
-    if (!text || sending) return;
+    if (!text || sending || !chatId) return;
+
+    if (text.startsWith('/')) {
+      const parsed = parseSlashInput(text);
+      if (parsed) {
+        const { cmdName, args } = parsed;
+        if (agentConfig.provider === 'boocode' && skillsByName.has(cmdName)) {
+          setInput('');
+          setSlashState(null);
+          setSending(true);
+          setPermissionPrompt(null);
+          setLiveTaskCommands([]);
+          try {
+            await api.coder.skillInvoke(
+              sessionId,
+              paneId,
+              cmdName,
+              args.length > 0 ? args : null,
+            );
+          } catch (err) {
+            toast.error(err instanceof Error ? err.message : 'skill invocation failed');
+          } finally {
+            setSending(false);
+          }
+          return;
+        }
+        if (!commandsByName.has(cmdName)) {
+          // Unknown slash — fall through and send as literal text.
+        }
+      }
+    }
 
     setInput('');
+    setSlashState(null);
     setSending(true);
+    setPermissionPrompt(null);
+    setLiveTaskCommands([]);
 
-    // Optimistic user message
     const tempId = `temp-${Date.now()}`;
     setMessages((prev) => [...prev, { id: tempId, role: 'user', content: text, status: 'complete' }]);
 
     try {
-      const res = await fetch(`/api/coder/sessions/${sessionId}/messages`, {
-        method: 'POST',
-        headers: { 'content-type': 'application/json' },
-        body: JSON.stringify({ content: text }),
+      const data = await api.coder.sendMessage(sessionId, {
+        content: text,
+        pane_id: paneId,
+        chat_id: chatId,
+        provider: agentConfig.provider !== 'boocode' ? agentConfig.provider : undefined,
+        model: agentConfig.model || undefined,
+        mode_id: agentConfig.modeId ?? undefined,
+        thinking_option_id: agentConfig.thinkingOptionId ?? undefined,
       });
-      if (res.ok) {
-        const data = await res.json();
-        // Replace temp message with real one if server returned it
-        if (data.user_message_id) {
-          setMessages((prev) =>
-            prev.map((m) => m.id === tempId ? { ...m, id: data.user_message_id } : m)
-          );
-        }
+      if (data.user_message_id) {
+        setMessages((prev) =>
+          prev.map((m) => (m.id === tempId ? { ...m, id: data.user_message_id! } : m))
+        );
       }
-    } catch {
-      // The WS will bring the real messages; optimistic is good enough
+      if (data.task_id) {
+        setActiveTaskId(data.task_id);
+      } else {
+        setActiveTaskId(null);
+      }
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'failed to send');
     } finally {
       setSending(false);
     }
-  }, [input, sending, sessionId, setMessages]);
+  }, [
+    input,
+    sending,
+    sessionId,
+    paneId,
+    chatId,
+    agentConfig,
+    skillsByName,
+    commandsByName,
+    setMessages,
+  ]);
+
+  const handleSlashSelect = useCallback((name: string) => {
+    const next = `/${name} `;
+    setInput(next);
+    setSlashState(null);
+    requestAnimationFrame(() => {
+      const ta = inputRef.current;
+      if (ta) {
+        ta.selectionStart = ta.selectionEnd = next.length;
+        ta.focus();
+      }
+    });
+  }, []);
+
+  const handleInputChange = useCallback((e: React.ChangeEvent<HTMLTextAreaElement>) => {
+    const newValue = e.target.value;
+    setInput(newValue);
+    if (isSlashCommandToken(newValue)) {
+      setSlashState({ query: slashQuery(newValue) });
+    } else {
+      setSlashState(null);
+    }
+  }, []);
 
   const handleKeyDown = useCallback(
     (e: React.KeyboardEvent) => {
+      if (slashState) return;
+      if (e.nativeEvent.isComposing) return;
       if (e.key === 'Enter' && !e.shiftKey) {
         e.preventDefault();
         void handleSend();
       }
     },
-    [handleSend]
+    [handleSend, slashState]
   );
 
   return (
     <div className="flex flex-col h-full bg-background">
-      {/* Header */}
-      <div className="flex items-center gap-2 px-3 py-1.5 border-b border-border bg-muted/30 shrink-0">
-        <Code size={14} className="text-muted-foreground" />
-        <span className="text-xs font-medium text-muted-foreground">BooCoder</span>
-        <span
-          className={cn(
-            'inline-block w-1.5 h-1.5 rounded-full ml-auto',
-            connected ? 'bg-green-500' : 'bg-red-500'
-          )}
-          title={connected ? 'Connected' : 'Disconnected'}
-        />
-      </div>
-
-      {/* Chat area */}
-      <div className="flex-1 min-h-0 overflow-y-auto">
+      {/* Chat area — BooChat-style timeline (text + tool runs as siblings) */}
+      <div className="flex-1 min-h-0 flex flex-col">
         {messages.length === 0 ? (
-          <div className="flex flex-col items-center justify-center h-full text-sm text-muted-foreground gap-2">
+          <div className="flex flex-col items-center justify-center flex-1 text-sm text-muted-foreground gap-2">
             <Code size={32} className="opacity-40" />
-            <p>Send a message to start coding</p>
+            <p>{chatPending || !chatId ? 'Preparing pane chat…' : 'Send a message to start coding'}</p>
           </div>
         ) : (
-          <div className="py-2">
-            {messages.map((msg) => (
-              <CoderMessageBubble key={msg.id} message={msg} />
-            ))}
-            <div ref={messagesEndRef} />
-          </div>
+          <CoderMessageList
+            messages={messages as CoderTimelineWire[]}
+            footer={
+              activeTaskId && !permissionPrompt && sending === false ? (
+                <p className="text-xs text-muted-foreground animate-pulse">Agent running…</p>
+              ) : undefined
+            }
+          />
         )}
       </div>
 
+      {permissionPrompt && (
+        <PermissionCard
+          prompt={permissionPrompt}
+          onRespond={(id) => void handlePermissionRespond(id)}
+          busy={permissionBusy}
+        />
+      )}
+
       {/* Diff panel — only shows when there are pending changes */}
       {changes.filter((c) => c.status === 'pending').length > 0 && (
         <div className="h-48 shrink-0">
@@ -404,28 +733,46 @@ export function CoderPane({ sessionId }: Props) {
         </div>
       )}
 
-      {/* Input */}
-      <div className="shrink-0 border-t border-border p-2">
+      {/* Composer + input */}
+      <div className="shrink-0 border-t border-border">
+        {displayedCommands.length > 0 && <AgentCommandsHint commands={displayedCommands} />}
+        <AgentComposerBar
+          projectPath={projectPath}
+          value={agentConfig}
+          onChange={setAgentConfig}
+          onProviderCommandsChange={handleProviderCommandsChange}
+        />
+        <div className="p-2">
         <div className="flex items-end gap-2">
           <textarea
             ref={inputRef}
             value={input}
-            onChange={(e) => setInput(e.target.value)}
+            onChange={handleInputChange}
             onKeyDown={handleKeyDown}
-            placeholder="Ask BooCoder to write code..."
+            placeholder="Type / for commands…"
             rows={1}
             className="flex-1 resize-none rounded-md border border-input bg-background px-3 py-2 text-sm placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring max-h-32 min-h-[36px] max-md:min-h-[44px]"
           />
           <button
             type="button"
             onClick={() => void handleSend()}
-            disabled={!input.trim() || sending}
+            disabled={!input.trim() || sending || !chatId || chatPending}
             className="inline-flex items-center justify-center size-9 max-md:min-h-[44px] max-md:min-w-[44px] rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-40 disabled:cursor-not-allowed shrink-0"
             aria-label="Send message"
           >
             <Send size={16} />
           </button>
         </div>
+        </div>
+        {slashState && (
+          <SlashCommandPicker
+            query={slashState.query}
+            items={displayedCommands}
+            inputRef={inputRef}
+            onSelect={handleSlashSelect}
+            onClose={() => setSlashState(null)}
+          />
+        )}
       </div>
     </div>
   );

apps/web/src/hooks/useProviderSnapshot.ts

@@ -0,0 +1,49 @@
+import { useEffect, useSyncExternalStore } from 'react';
+import { api } from '@/api/client';
+import type { ProviderSnapshotEntry } from '@/api/types';
+
+let cached: ProviderSnapshotEntry[] | null = null;
+let inflight: Promise<ProviderSnapshotEntry[]> | null = null;
+const listeners = new Set<() => void>();
+
+function notify(): void {
+  for (const fn of listeners) fn();
+}
+
+function subscribe(fn: () => void): () => void {
+  listeners.add(fn);
+  return () => listeners.delete(fn);
+}
+
+function getSnapshot(): ProviderSnapshotEntry[] | null {
+  return cached;
+}
+
+async function doFetch(cwd?: string): Promise<ProviderSnapshotEntry[]> {
+  const data = await api.coder.snapshot(cwd);
+  cached = data;
+  inflight = null;
+  notify();
+  return data;
+}
+
+function ensureLoaded(cwd?: string): void {
+  if (cached || inflight) return;
+  inflight = doFetch(cwd).catch((err) => {
+    inflight = null;
+    console.error('provider snapshot fetch failed:', err);
+    return [];
+  });
+}
+
+export function refreshProviderSnapshot(cwd?: string): Promise<ProviderSnapshotEntry[]> {
+  cached = null;
+  inflight = null;
+  return doFetch(cwd);
+}
+
+export function useProviderSnapshot(cwd?: string): ProviderSnapshotEntry[] | null {
+  const entries = useSyncExternalStore(subscribe, getSnapshot);
+  useEffect(() => { ensureLoaded(cwd); }, [cwd]);
+  return entries;
+}

apps/web/src/hooks/useSessionStream.ts

@@ -48,9 +48,14 @@ function applyFrame(state: State, frame: WsFrame): State {
       return { ...state, messages: [...state.messages, newMsg] };
     }
     case 'delta': {
-      const next = state.messages.map((m) =>
-        m.id === frame.message_id ? { ...m, content: m.content + frame.content } : m
-      );
+      const next = state.messages.map((m) => {
+        if (m.id !== frame.message_id) return m;
+        const chunk = frame.content ?? '';
+        if (m.role === 'user') {
+          return { ...m, content: chunk || m.content };
+        }
+        return { ...m, content: m.content + chunk };
+      });
       return { ...state, messages: next };
     }
     case 'tool_call': {

apps/web/src/hooks/useWorkspacePanes.ts

@@ -32,19 +32,19 @@ function chatPane(chatId: string): WorkspacePane {
   return { id: generateId(), kind: 'chat', chatId, chatIds: [chatId], activeChatIdx: 0 };
 }
 
-// v1.10 booterm: terminal panes carry no chats. Their `id` is used as the
-// tmux window key on booterm — see apps/booterm/src/pty/manager.ts. They
-// persist in localStorage along with chat panes so a refresh resumes the
-// same tmux window via the idempotent start endpoint.
-function terminalPane(id: string = generateId()): WorkspacePane {
-  return { id, kind: 'terminal', chatIds: [], activeChatIdx: -1 };
+function chatNameForPaneKind(kind: 'coder' | 'terminal'): string {
+  return kind === 'coder' ? 'BooCoder' : 'Terminal';
 }
 
-// v2.0.0: coder pane — renders the BooCoder interface (chat + diff panel).
-// Like terminal panes, carries no chats — the CoderPane component manages
-// its own session/messages via the /api/coder proxy.
-function coderPane(id: string = generateId()): WorkspacePane {
-  return { id, kind: 'coder', chatIds: [], activeChatIdx: -1 };
+function scopedPane(id: string, kind: 'coder' | 'terminal', chatId: string): WorkspacePane {
+  return { id, kind, chatId, chatIds: [chatId], activeChatIdx: 0 };
+}
+
+/** Active chat id for a pane row (chat / coder / terminal). */
+export function activePaneChatId(pane: WorkspacePane): string | undefined {
+  const idx = pane.activeChatIdx ?? 0;
+  if (idx >= 0 && pane.chatIds?.[idx]) return pane.chatIds[idx];
+  return pane.chatId;
 }
 
 // v1.9: settings pane factory. No chats, no state beyond identity — the
@@ -79,8 +79,20 @@ function htmlArtifactPane(state: HtmlArtifactState): WorkspacePane {
 // v1.9: settings panes are ephemeral. Filter them out before persisting so a
 // page reload always returns to a clean workspace; the user re-opens via the
 // sidebar Settings button when needed.
+function normalizePaneKind(pane: WorkspacePane): WorkspacePane {
+  // v2.3: server once accepted legacy 'agent' before 'coder' landed in the schema.
+  if ((pane.kind as string) === 'agent') {
+    return { ...pane, kind: 'coder' };
+  }
+  return pane;
+}
+
+function normalizePanes(panes: WorkspacePane[]): WorkspacePane[] {
+  return panes.map(normalizePaneKind);
+}
+
 function persistablePanes(panes: WorkspacePane[]): WorkspacePane[] {
-  return panes.filter((p) => p.kind !== 'settings');
+  return normalizePanes(panes).filter((p) => p.kind !== 'settings');
 }
 
 // v1.9: per recon decision (c), settings panes don't count toward MAX_PANES.
@@ -128,6 +140,8 @@ export interface UseWorkspacePanesResult {
   removeChatFromPanes: (chatId: string) => void;
   initializeFirstChatIfEmpty: (chatId: string) => void;
   validatePanes: (validChatIds: Set<string>) => void;
+  /** True while a coder/terminal pane is waiting for its scoped chat row. */
+  isPaneChatPending: (paneId: string) => boolean;
   handlePaneDragStart: (idx: number) => (e: DragEvent<HTMLDivElement>) => void;
   handlePaneDragOver: (idx: number) => (e: DragEvent<HTMLDivElement>) => void;
   handlePaneDragLeave: () => void;
@@ -149,6 +163,54 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
   // Tracks the last value broadcast by another device (or this one's own
   // round-trip). If a PATCH would echo this exact payload, we skip the call.
   const lastRemoteJsonRef = useRef<string>('[]');
+  const pendingPaneChatRef = useRef<Set<string>>(new Set());
+  const [pendingPaneChatIds, setPendingPaneChatIds] = useState<Set<string>>(() => new Set());
+
+  const markPaneChatPending = useCallback((paneId: string, pending: boolean) => {
+    setPendingPaneChatIds((prev) => {
+      const next = new Set(prev);
+      if (pending) next.add(paneId);
+      else next.delete(paneId);
+      pendingPaneChatRef.current = next;
+      return next;
+    });
+  }, []);
+
+  const attachChatToPane = useCallback(
+    (paneId: string, chatId: string, kind: 'coder' | 'terminal') => {
+      setPanes((prev) =>
+        prev.map((p) => (p.id === paneId ? scopedPane(paneId, kind, chatId) : p)),
+      );
+    },
+    [],
+  );
+
+  const seedPaneChat = useCallback(
+    async (paneId: string, kind: 'coder' | 'terminal') => {
+      if (pendingPaneChatRef.current.has(paneId)) return;
+      markPaneChatPending(paneId, true);
+      try {
+        const chat = await api.chats.create(sessionId, { name: chatNameForPaneKind(kind) });
+        attachChatToPane(paneId, chat.id, kind);
+      } catch (err) {
+        toast.error(err instanceof Error ? err.message : 'Failed to create pane chat');
+      } finally {
+        markPaneChatPending(paneId, false);
+      }
+    },
+    [sessionId, attachChatToPane, markPaneChatPending],
+  );
+
+  const seedEmptyScopedPanes = useCallback(
+    (paneList: WorkspacePane[]) => {
+      for (const pane of paneList) {
+        if (pane.kind !== 'coder' && pane.kind !== 'terminal') continue;
+        if ((pane.chatIds?.length ?? 0) > 0 || pane.chatId) continue;
+        void seedPaneChat(pane.id, pane.kind);
+      }
+    },
+    [seedPaneChat],
+  );
 
   // v1.12.1: hydrate from server on mount, then subscribe to remote updates.
   useEffect(() => {
@@ -159,7 +221,7 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
         const session = await api.sessions.get(sessionId);
         if (cancelled) return;
         let initial: WorkspacePane[] = Array.isArray(session.workspace_panes)
-          ? session.workspace_panes
+          ? normalizePanes(session.workspace_panes)
           : [];
         // One-time migration: if server is empty but legacy localStorage has
         // a layout, seed the server and delete the local key.
@@ -180,12 +242,13 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
         lastRemoteJsonRef.current = JSON.stringify(persistablePanes(next));
         setPanes(next);
         setActivePaneIdx(0);
+        seedEmptyScopedPanes(next);
       } finally {
         if (!cancelled) hydratedRef.current = true;
       }
     })();
     return () => { cancelled = true; };
-  }, [sessionId]);
+  }, [sessionId, seedEmptyScopedPanes]);
 
   // v1.12.1: live cross-device sync. Replace local state when another device
   // (or our own write echo) lands a session_workspace_updated frame.
@@ -193,14 +256,17 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
     return sessionEvents.subscribe((ev) => {
       if (ev.type !== 'session_workspace_updated') return;
       if (ev.session_id !== sessionId) return;
-      const incoming = Array.isArray(ev.workspace_panes) ? ev.workspace_panes : [];
+      const incoming = normalizePanes(
+        Array.isArray(ev.workspace_panes) ? ev.workspace_panes : [],
+      );
       const json = JSON.stringify(incoming);
       if (json === lastRemoteJsonRef.current) return;
       lastRemoteJsonRef.current = json;
       setPanes(incoming.length > 0 ? incoming : [emptyPane()]);
       setActivePaneIdx((prev) => Math.min(prev, Math.max(0, incoming.length - 1)));
+      seedEmptyScopedPanes(incoming.length > 0 ? incoming : [emptyPane()]);
     });
-  }, [sessionId]);
+  }, [sessionId, seedEmptyScopedPanes]);
 
   // v1.14.x-html-artifact-panes: ActionRow's "Open in pane" emits one of
   // these per click. If a pane already exists for the same message_id, focus
@@ -388,8 +454,10 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
 
   const showLandingPage = useCallback((paneIdx: number) => {
     setPanes((prev) => {
+      const pane = prev[paneIdx];
+      // Coder/terminal panes are not chat hosts — history button is chat-only.
+      if (!pane || pane.kind === 'coder' || pane.kind === 'terminal') return prev;
       const next = [...prev];
-      const pane = next[paneIdx]!;
       next[paneIdx] = { ...pane, kind: 'empty', chatId: undefined };
       return next;
     });
@@ -408,16 +476,21 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
         return prev;
       }
       const newPane =
-        kind === 'terminal' ? terminalPane(newPaneId) :
-        kind === 'coder' ? coderPane(newPaneId) :
-        emptyPane(newPaneId);
+        kind === 'terminal'
+          ? { id: newPaneId, kind: 'terminal' as const, chatIds: [] as string[], activeChatIdx: -1 }
+          : kind === 'coder'
+            ? { id: newPaneId, kind: 'coder' as const, chatIds: [] as string[], activeChatIdx: -1 }
+            : emptyPane(newPaneId);
       const next = [...prev, newPane];
       setActivePaneIdx(next.length - 1);
       success = true;
+      if (kind === 'terminal' || kind === 'coder') {
+        queueMicrotask(() => void seedPaneChat(newPaneId, kind));
+      }
       return next;
     });
     return success ? newPaneId : null;
-  }, []);
+  }, [seedPaneChat]);
 
   const toggleSettingsPane = useCallback(() => {
     setPanes((prev) => {
@@ -476,19 +549,39 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
   const validatePanes = useCallback((validChatIds: Set<string>) => {
     setPanes((prev) => {
       const cleaned = prev.map((pane) => {
-        if (pane.kind !== 'chat' || pane.chatIds.length === 0) return pane;
+        const usesChat =
+          pane.kind === 'chat' || pane.kind === 'coder' || pane.kind === 'terminal';
+        if (!usesChat || pane.chatIds.length === 0) return pane;
         const nextIds = pane.chatIds.filter((id) => validChatIds.has(id));
         if (nextIds.length === pane.chatIds.length) return pane;
         if (nextIds.length === 0) {
-          return { ...pane, kind: 'empty' as const, chatId: undefined, chatIds: [], activeChatIdx: -1 };
+          if (pane.kind === 'chat') {
+            return { ...pane, kind: 'empty' as const, chatId: undefined, chatIds: [], activeChatIdx: -1 };
+          }
+          return { ...pane, chatId: undefined, chatIds: [], activeChatIdx: -1 };
         }
         const nextActiveIdx = Math.min(pane.activeChatIdx, nextIds.length - 1);
         return { ...pane, chatIds: nextIds, activeChatIdx: nextActiveIdx, chatId: nextIds[nextActiveIdx] };
       });
       const unchanged = cleaned.every((p, i) => p === prev[i]);
-      return unchanged ? prev : cleaned;
+      const next = unchanged ? prev : cleaned;
+      if (!unchanged) {
+        for (const pane of next) {
+          if (pane.kind === 'coder' && !activePaneChatId(pane)) {
+            queueMicrotask(() => void seedPaneChat(pane.id, 'coder'));
+          } else if (pane.kind === 'terminal' && !activePaneChatId(pane)) {
+            queueMicrotask(() => void seedPaneChat(pane.id, 'terminal'));
+          }
+        }
+      }
+      return next;
     });
-  }, []);
+  }, [seedPaneChat]);
+
+  const isPaneChatPending = useCallback(
+    (paneId: string) => pendingPaneChatIds.has(paneId),
+    [pendingPaneChatIds],
+  );
 
   const removeChatFromPanes = useCallback((chatId: string) => {
     setPanes((prev) => prev.map((p) => {
@@ -574,6 +667,7 @@ export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
     removeChatFromPanes,
     initializeFirstChatIfEmpty,
     validatePanes,
+    isPaneChatPending,
     handlePaneDragStart,
     handlePaneDragOver,
     handlePaneDragLeave,

apps/web/src/lib/apply-user-delta.ts

@@ -0,0 +1,11 @@
+/** User messages are inserted atomically — never stream-append like assistant deltas. */
+export function applyMessageDelta(
+  role: 'user' | 'assistant' | 'system' | 'tool',
+  existingContent: string,
+  chunk: string,
+): string {
+  if (role === 'user') {
+    return chunk || existingContent;
+  }
+  return existingContent + chunk;
+}

apps/web/src/lib/coder-session.ts

@@ -0,0 +1,18 @@
+/** Sessions created for BooCoder work (sidebar / project list icons). */
+export function isCoderSessionName(name: string | null | undefined): boolean {
+  if (!name) return false;
+  if (name === 'New BooCode') return true;
+  if (name.startsWith('Task [')) return true;
+  if (name.startsWith('Coder:')) return true;
+  return false;
+}
+
+/** Optimistic coder pane shell before scoped chat id arrives from the server. */
+export function defaultCoderWorkspacePane(id: string = crypto.randomUUID()) {
+  return {
+    id,
+    kind: 'coder' as const,
+    chatIds: [] as string[],
+    activeChatIdx: -1,
+  };
+}

apps/web/src/lib/coder-tools.ts

@@ -0,0 +1,68 @@
+import type { ToolCall, ToolResult } from '@/api/types';
+import type { ToolRun } from '@/components/ToolCallLine';
+
+export interface AcpWireMeta {
+  status?: 'running' | 'completed' | 'failed' | 'canceled';
+  kind?: string | null;
+  title?: string;
+  output?: unknown;
+  error?: string;
+}
+
+export interface CoderToolCallWire {
+  id: string;
+  function: { name: string; arguments: string };
+}
+
+function parseArgs(raw: string): Record<string, unknown> {
+  try {
+    const parsed = JSON.parse(raw) as Record<string, unknown>;
+    return parsed && typeof parsed === 'object' ? parsed : {};
+  } catch {
+    return {};
+  }
+}
+
+export function wireToolCallToRun(wire: CoderToolCallWire): ToolRun {
+  const args = parseArgs(wire.function.arguments);
+  const acp = args._acp as AcpWireMeta | undefined;
+  const { _acp: _ignored, ...rest } = args;
+  const lifecycle = acp?.status ?? 'running';
+  const call: ToolCall = {
+    id: wire.id,
+    name: wire.function.name,
+    args: rest,
+  };
+  if (lifecycle === 'running') {
+    return { call, result: null };
+  }
+  const result: ToolResult = {
+    tool_call_id: wire.id,
+    output: acp?.output ?? null,
+    truncated: false,
+    ...(acp?.error ? { error: acp.error } : {}),
+  };
+  return { call, result };
+}
+
+export function mergeWireToolCall(
+  existing: CoderToolCallWire[] | undefined,
+  incoming: { id: string; name: string; args: Record<string, unknown> },
+): CoderToolCallWire[] {
+  const entry: CoderToolCallWire = {
+    id: incoming.id,
+    function: { name: incoming.name, arguments: JSON.stringify(incoming.args) },
+  };
+  const list = existing ?? [];
+  const idx = list.findIndex((tc) => tc.id === incoming.id);
+  if (idx >= 0) {
+    const next = [...list];
+    next[idx] = entry;
+    return next;
+  }
+  return [...list, entry];
+}
+
+export function wireToolCallsToRuns(wires: CoderToolCallWire[] | undefined): ToolRun[] {
+  return (wires ?? []).map(wireToolCallToRun);
+}

apps/web/src/lib/slash-command.ts

@@ -0,0 +1,29 @@
+export interface SlashCommandItem {
+  name: string;
+  description?: string;
+}
+
+/** True while the user is still typing the command name after `/`. */
+export function isSlashCommandToken(value: string): boolean {
+  return /^\/[^\s]*$/.test(value);
+}
+
+export function slashQuery(value: string): string {
+  return value.slice(1);
+}
+
+export function parseSlashInput(text: string): { cmdName: string; args: string } | null {
+  const match = text.match(/^\/(\S+)\s*([\s\S]*)$/);
+  if (!match) return null;
+  return { cmdName: match[1]!, args: (match[2] ?? '').trim() };
+}
+
+export function mergeCommandsByName(...lists: SlashCommandItem[][]): SlashCommandItem[] {
+  const byName = new Map<string, SlashCommandItem>();
+  for (const list of lists) {
+    for (const cmd of list) {
+      byName.set(cmd.name, cmd);
+    }
+  }
+  return [...byName.values()].sort((a, b) => a.name.localeCompare(b.name));
+}

apps/web/src/pages/Project.tsx

@@ -1,12 +1,13 @@
 import { useEffect, useState } from 'react';
 import { Link, useNavigate, useParams } from 'react-router-dom';
-import { Plus, MessageSquare, Trash2, ChevronDown, ChevronRight, RotateCcw, Menu } from 'lucide-react';
+import { Plus, MessageSquare, Trash2, ChevronDown, ChevronRight, RotateCcw, Menu, Code } from 'lucide-react';
 import { toast } from 'sonner';
 import { api } from '@/api/client';
 import type { Project as ProjectType, Session } from '@/api/types';
 import { Button } from '@/components/ui/button';
 import { sessionEvents } from '@/hooks/sessionEvents';
 import { useSessions } from '@/hooks/useSessions';
+import { isCoderSessionName } from '@/lib/coder-session';
 import { useSidebarDrawer } from '@/hooks/useSidebarDrawer';
 import { useViewport } from '@/hooks/useViewport';
 
@@ -124,7 +125,11 @@ export function Project() {
             {sessions.map((s) => (
               <li key={s.id} className="flex items-center justify-between px-3 py-2 hover:bg-muted/50">
                 <Link to={`/session/${s.id}`} className="flex-1 flex items-center gap-2 min-w-0">
-                  <MessageSquare className="size-3.5 opacity-70 shrink-0" />
+                  {isCoderSessionName(s.name) ? (
+                    <Code className="size-3.5 opacity-70 shrink-0" />
+                  ) : (
+                    <MessageSquare className="size-3.5 opacity-70 shrink-0" />
+                  )}
                   <span className="truncate text-sm">{s.name}</span>
                   <span className="text-xs text-muted-foreground font-mono ml-2 shrink-0">
                     {s.model}