v2.1.0-provider-picker: BooCoder systemd migration + provider picker

- BooCoder moves from Docker to host systemd service (boocoder.service)
- Agent dispatch (ACP + PTY) switches from SSH to direct spawn/exec
- SSH helpers marked @deprecated (kept for one release cycle)
- Provider registry (5 providers: boocode, opencode, goose, claude, qwen)
- Agent probe with direct which/exec + model discovery (qwen settings, static claude models)
- GET /api/providers route with installed status, models, transport fallback
- ProviderPicker frontend component in CoderPane header
- External provider messages route through tasks row instead of inference enqueue
- Smart scroll: MessageList only auto-scrolls when near bottom (150px threshold)
- DB: available_agents gets models, label, transport columns
- Bug fix: loadContext SELECT includes allowed_read_paths
- Bug fix: cap hit sentinel inserted before buildMessagesPayload
- docker-compose.yml: boocoder service commented out, BOOCODER_URL env var added
- CLAUDE.md: updated docs for systemd, provider registry, JSONB gotcha, loadContext

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 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.
 
+## v2.1.0-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.
+
 ## v2.0.4-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).

CLAUDE.md

@@ -66,16 +66,24 @@ 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. Separate Fastify server at port 9502, same docker network (`boocode_net`).
-- **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 (Dockerfile builds server → coder).
+- 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 `http://boocoder:3000/api/*`. WS connects directly to `:9502`.
+- 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/`)
 
@@ -122,7 +130,11 @@ Schema CHECK migration order when renaming allowed values: (1) `ALTER TABLE ...
 
 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`. Same Tailscale IP binding as BooChat. Health reports tool count: `{"ok":true,"db":true,"tools":30}`.
+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; dispatch via SSH). 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
 
@@ -133,7 +145,7 @@ BooCoder at port 9502: `curl http://100.114.205.53:9502/api/health`. Same Tailsc
 - 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).
@@ -169,4 +181,5 @@ BooCoder at port 9502: `curl http://100.114.205.53:9502/api/health`. Same Tailsc
 - 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.
-- **Docker build order for workspace deps**: the Dockerfile must `COPY` + `RUN pnpm build` the provider app BEFORE the consumer app. `apps/coder/Dockerfile` builds `apps/server` first, then `apps/coder`.
+- **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.

apps/coder/.env.host

@@ -0,0 +1,14 @@
+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

apps/coder/src/index.ts

@@ -28,6 +28,7 @@ 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';
@@ -145,6 +146,7 @@ async function main() {
   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/messages.ts

@@ -6,7 +6,9 @@ import type { WsFrame } from '@boocode/server/ws-frames';
 
 const SendBody = z.object({
   content: z.string().min(1).max(64_000),
-  chat_id: z.string().uuid(),
+  chat_id: z.string().uuid().optional(),
+  provider: z.string().max(100).optional(),
+  model: z.string().max(200).optional(),
 });
 
 interface InferenceApi {
@@ -32,73 +34,104 @@ export function registerMessageRoutes(
       }
 
       const sessionId = req.params.sessionId;
-      const { content, chat_id: chatId } = parsed.data;
+      const { content, chat_id: explicitChatId, provider, model } = 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'
+      // Resolve chat_id: use explicit value or find/create a default chat
+      let chatId: string;
+      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;
+      } else {
+        const existing = await sql<{ id: string }[]>`
+          SELECT id FROM chats WHERE session_id = ${sessionId} AND status = 'open' ORDER BY created_at LIMIT 1
+        `;
+        if (existing.length > 0) {
+          chatId = existing[0]!.id;
+        } else {
+          const [newChat] = await sql<{ id: string }[]>`
+            INSERT INTO chats (session_id, name, status)
+            VALUES (${sessionId}, 'Chat', 'open')
+            RETURNING id
+          `;
+          chatId = newChat!.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' };
+        }
+      }
+
+      // 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
       `;
-      if (chatRows.length === 0) {
-        reply.code(404);
-        return { error: 'chat not found or not open in this session' };
-      }
+      await sql`UPDATE sessions SET updated_at = clock_timestamp() WHERE id = ${sessionId}`;
+      await sql`UPDATE chats SET updated_at = clock_timestamp() WHERE id = ${chatId}`;
 
-      // Reject if inference is already running on this chat
-      if (inference.hasActive(chatId)) {
-        reply.code(409);
-        return { error: 'inference already running on this chat' };
-      }
-
-      // 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 };
-      });
-
-      // Publish user message frames so WS subscribers see it immediately
+      // 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, session_id)
+          VALUES (${projectId}, ${content}, ${provider}, ${model ?? 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 +1,80 @@
+import type { FastifyInstance } from 'fastify';
+import type { Sql } from '../db.js';
+import type { Config } from '../config.js';
+import { PROVIDERS } from '../services/provider-registry.js';
+
+interface ProviderModel {
+  id: string;
+  label: string;
+}
+
+interface ProviderResponse {
+  name: string;
+  label: string;
+  transport: string;
+  installed: boolean;
+  models: ProviderModel[];
+}
+
+interface LlamaSwapModel {
+  id: string;
+  [key: string]: unknown;
+}
+
+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?: LlamaSwapModel[] };
+    return (parsed.data ?? []).map((m) => ({ id: m.id, label: m.id }));
+  } catch {
+    return [];
+  }
+}
+
+export function registerProviderRoutes(app: FastifyInstance, sql: Sql, config: Config): void {
+  app.get('/api/providers', async (_req, _reply) => {
+    const llamaModels = await fetchLlamaSwapModels(config);
+
+    const agents = await sql<{ name: string; models: ProviderModel[]; label: string | null; transport: string | null; supports_acp: boolean }[]>`
+      SELECT name, models, label, transport, supports_acp FROM available_agents
+    `;
+    const agentMap = new Map(agents.map((a) => [a.name, a]));
+
+    const result: ProviderResponse[] = [];
+
+    for (const provider of PROVIDERS) {
+      const isNative = provider.name === 'boocode';
+      const agentRow = agentMap.get(provider.name);
+      const installed = isNative || !!agentRow;
+
+      if (!installed) continue;
+
+      let models: ProviderModel[];
+      if (provider.modelSource === 'llama-swap') {
+        models = llamaModels;
+      } else if (agentRow?.models && agentRow.models.length > 0) {
+        models = agentRow.models;
+      } else if (provider.staticModels) {
+        models = provider.staticModels;
+      } else {
+        models = [];
+      }
+
+      let transport: string = provider.transport;
+      if (agentRow) {
+        transport = provider.transport === 'acp' && !agentRow.supports_acp ? 'pty' : provider.transport;
+      }
+
+      result.push({
+        name: provider.name,
+        label: agentRow?.label ?? provider.label,
+        transport,
+        installed,
+        models,
+      });
+    }
+
+    return result;
+  });
+}

apps/coder/src/schema.sql

@@ -61,3 +61,8 @@ 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';

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

@@ -1,12 +1,12 @@
 /**
- * ACP dispatch — runs ACP-capable agents (opencode, goose) on the host via SSH.
+ * ACP dispatch — runs ACP-capable agents (opencode, goose) directly on the host.
  *
- * Uses the @agentclientprotocol/sdk to establish a structured JSON-RPC session
- * with the agent subprocess. The SSH tunnel provides stdio transport.
+ * v2.1.1: BooCoder runs on the host now — agents are spawned directly,
+ * no SSH needed. Uses @agentclientprotocol/sdk for structured JSON-RPC.
  *
  * Flow:
- * 1. SSH to host, start `opencode acp` (or `goose acp`) in the worktree
- * 2. Wrap SSH child's stdin/stdout into NDJSON streams
+ * 1. Spawn `opencode acp` (or `goose acp`) in the worktree
+ * 2. Wrap child's stdin/stdout into NDJSON streams
  * 3. Create a ClientSideConnection from the SDK
  * 4. Initialize → newSession → prompt(task)
  * 5. Collect session updates (tool calls, text output)
@@ -28,7 +28,7 @@ import {
   type CreateTerminalRequest,
   type CreateTerminalResponse,
 } from '@agentclientprotocol/sdk';
-import { sshSpawn } from './ssh.js';
+import { spawn } from 'node:child_process';
 
 export interface AcpDispatchResult {
   exitCode: number;
@@ -42,17 +42,17 @@ export interface AcpDispatchOpts {
   task: string;
   worktreePath: string;
   model?: string;
+  installPath?: string;
   signal?: AbortSignal;
   log: FastifyBaseLogger;
 }
 
-/** Map agent name to the ACP command it exposes. */
-function acpCommand(agent: string): string | null {
+function acpArgs(agent: string): string[] | null {
   switch (agent) {
     case 'opencode':
-      return 'opencode acp';
+      return ['acp'];
     case 'goose':
-      return 'goose acp';
+      return ['acp'];
     default:
       return null;
   }
@@ -114,10 +114,10 @@ function nodeWritableToWeb(nodeStream: NodeJS.WritableStream): WritableStream<Ui
  * all session updates. Returns the collected output and tool calls.
  */
 export async function dispatchViaAcp(opts: AcpDispatchOpts): Promise<AcpDispatchResult> {
-  const { agent, task, worktreePath, signal, log } = opts;
+  const { agent, task, worktreePath, installPath, signal, log } = opts;
 
-  const cmd = acpCommand(agent);
-  if (!cmd) {
+  const args = acpArgs(agent);
+  if (!args) {
     return {
       exitCode: 1,
       output: `Agent '${agent}' does not support ACP.`,
@@ -126,12 +126,13 @@ export async function dispatchViaAcp(opts: AcpDispatchOpts): Promise<AcpDispatch
     };
   }
 
-  // Spawn SSH with the ACP command running in the worktree
-  const escapedPath = worktreePath.replace(/'/g, "'\\''");
-  const fullCommand = `cd '${escapedPath}' && ${cmd}`;
-
-  log.info({ agent, worktreePath }, 'acp-dispatch: spawning');
-  const child = sshSpawn(fullCommand);
+  const binary = installPath ?? agent;
+  log.info({ agent, binary, worktreePath }, 'acp-dispatch: spawning');
+  const child = spawn(binary, args, {
+    cwd: worktreePath,
+    stdio: ['pipe', 'pipe', 'pipe'],
+    env: { ...process.env },
+  });
 
   // Wire up abort
   let killed = false;

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

@@ -1,69 +1,91 @@
 import type { Sql } from '../db.js';
 import type { FastifyBaseLogger } from 'fastify';
-import { sshExec } from './ssh.js';
+import { exec as execCb } from 'node:child_process';
+import { promisify } from 'node:util';
+import { PROVIDERS_BY_NAME } from './provider-registry.js';
 
-const KNOWN_AGENTS: Array<{ name: string; supportsAcp: boolean }> = [
-  { name: 'opencode', supportsAcp: true },
-  { name: 'goose', supportsAcp: true },
-  { name: 'claude', supportsAcp: false },
-  { name: 'pi', supportsAcp: false },
-  { name: 'qwen', supportsAcp: false },
-];
+const exec = promisify(execCb);
+
+const KNOWN_AGENTS = ['opencode', 'goose', 'claude', 'qwen'].map((name) => ({
+  name,
+  supportsAcp: PROVIDERS_BY_NAME.get(name)?.transport === 'acp',
+}));
 
 /**
- * Probe for available agents on the HOST via SSH.
+ * Probe for available agents on the HOST.
  *
- * The boocoder container can't run agents locally — they live on the host.
- * We SSH to the host (same mechanism BooTerm uses) and check which agent
- * binaries are on PATH.
+ * v2.1.1: BooCoder runs on the host now — agents are local binaries,
+ * no SSH needed. Direct `which` / `exec` calls.
  */
 export async function probeAgents(sql: Sql, log: FastifyBaseLogger): Promise<void> {
-  log.info('agent-probe: scanning HOST for known agents via SSH');
+  log.info('agent-probe: scanning for known agents');
 
   for (const agent of KNOWN_AGENTS) {
     try {
-      // Check if the agent binary is on the host's PATH
-      const whichResult = await sshExec(`which ${agent.name}`, { timeoutMs: 10_000 });
-      const installPath = whichResult.stdout.trim();
-      if (whichResult.exitCode !== 0 || !installPath) continue;
+      const { stdout: whichOut } = await exec(`which ${agent.name}`, { timeout: 10_000 });
+      const installPath = whichOut.trim();
+      if (!installPath) continue;
 
-      // Get version
       let version: string | null = null;
       try {
-        const verResult = await sshExec(`${agent.name} --version`, { timeoutMs: 15_000 });
-        if (verResult.exitCode === 0) {
-          version = verResult.stdout.trim().slice(0, 100);
-        }
+        const { stdout: verOut } = await exec(`${agent.name} --version`, { timeout: 15_000 });
+        version = verOut.trim().slice(0, 100);
       } catch {
-        // Some agents may not support --version — that's fine
+        // Some agents may not support --version
       }
 
-      // For ACP-capable agents, verify ACP mode actually works
       let supportsAcp = agent.supportsAcp;
       if (supportsAcp) {
         try {
-          const acpCheck = await sshExec(`${agent.name} acp --help`, { timeoutMs: 10_000 });
-          supportsAcp = acpCheck.exitCode === 0;
+          await exec(`${agent.name} acp --help`, { timeout: 10_000 });
         } catch {
           supportsAcp = false;
         }
       }
 
-      // UPSERT into available_agents
+      let models: Array<{ id: string; label: string }> = [];
+      const providerDef = PROVIDERS_BY_NAME.get(agent.name);
+
+      if (providerDef?.modelSource === 'static' && providerDef.staticModels) {
+        models = providerDef.staticModels;
+      }
+
+      if (agent.name === 'qwen') {
+        try {
+          const { stdout: catOut } = await exec('cat ~/.qwen/settings.json', { timeout: 10_000 });
+          if (catOut.trim()) {
+            const settings = JSON.parse(catOut) as {
+              modelProviders?: { openai?: Array<{ id: string }> };
+            };
+            const openaiModels = settings?.modelProviders?.openai;
+            if (Array.isArray(openaiModels)) {
+              models = openaiModels.map((m) => ({ id: m.id, label: m.id }));
+            }
+          }
+        } catch {
+          // ~/.qwen/settings.json missing or unparseable
+        }
+      }
+
+      const label = providerDef?.label ?? agent.name;
+      const transport = providerDef?.transport ?? 'pty';
+
       await sql`
-        INSERT INTO available_agents (name, install_path, version, supports_acp, last_probed_at)
-        VALUES (${agent.name}, ${installPath}, ${version}, ${supportsAcp}, clock_timestamp())
+        INSERT INTO available_agents (name, install_path, version, supports_acp, last_probed_at, models, label, transport)
+        VALUES (${agent.name}, ${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
+          last_probed_at = EXCLUDED.last_probed_at,
+          models = EXCLUDED.models,
+          label = EXCLUDED.label,
+          transport = EXCLUDED.transport
       `;
-      log.info({ agent: agent.name, version, installPath, supportsAcp }, 'agent-probe: found on host');
+      log.info({ agent: agent.name, version, installPath, supportsAcp, modelCount: models.length }, 'agent-probe: found');
     } catch (err) {
-      // SSH failed or agent not found — skip silently
       const msg = err instanceof Error ? err.message : String(err);
-      log.debug({ agent: agent.name, err: msg }, 'agent-probe: not found or SSH failed');
+      log.debug({ agent: agent.name, err: msg }, 'agent-probe: not found');
     }
   }
 

apps/coder/src/services/dispatcher.ts

@@ -34,8 +34,8 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
     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 }[]>`
-      SELECT id, project_id, input, agent, model
+    const rows = await sql<{ id: string; project_id: string; input: string; agent: string | null; model: string | null; session_id: string | null }[]>`
+      SELECT id, project_id, input, agent, model, session_id
       FROM tasks
       WHERE state = 'pending'
       ORDER BY created_at
@@ -51,16 +51,16 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
     });
   }
 
-  async function runTask(task: { id: string; project_id: string; input: string; agent: string | null; model: string | null }): Promise<void> {
+  async function runTask(task: { id: string; project_id: string; input: string; agent: string | null; model: 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 }[]>`
-        SELECT name, supports_acp FROM available_agents WHERE name = ${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);
+        await runExternalAgent(task, agentRow.supports_acp, agentRow.install_path);
         return;
       }
       // Agent specified but not available — fall through to Path A with a warning
@@ -73,7 +73,7 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
 
   // ─── Path A: Native Inference ───────────────────────────────────────────────
 
-  async function runNativeInference(task: { id: string; project_id: string; input: string; agent: string | null; model: string | null }): Promise<void> {
+  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)');
 
@@ -179,8 +179,9 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
   // ─── 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 },
+    task: { id: string; project_id: string; input: string; agent: string | null; model: string | null; session_id: string | null },
     supportsAcp: boolean,
+    installPath: string | null,
   ): Promise<void> {
     const taskId = task.id;
     const agent = task.agent!;
@@ -189,14 +190,14 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
     log.info({ taskId, agent, executionPath }, 'dispatcher: starting task (path B — external)');
 
     // Resolve the project's root path
-    const [project] = await sql<{ root_path: string | null }[]>`
-      SELECT root_path FROM projects WHERE id = ${task.project_id}
+    const [project] = await sql<{ path: string | null }[]>`
+      SELECT path FROM projects WHERE id = ${task.project_id}
     `;
-    const projectPath = project?.root_path;
+    const projectPath = project?.path;
     if (!projectPath) {
       await sql`
         UPDATE tasks
-        SET state = 'failed', ended_at = clock_timestamp(), output_summary = 'Project has no root_path — cannot create worktree'
+        SET state = 'failed', ended_at = clock_timestamp(), output_summary = 'Project has no path — cannot create worktree'
         WHERE id = ${taskId}
       `;
       return;
@@ -213,30 +214,49 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
         WHERE id = ${taskId}
       `;
 
-      // Create session + chat for this task (same as Path A — for output tracking)
-      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
-      `;
-      const sessionId = session!.id;
+      let sessionId: string;
+      let chatId: string;
 
-      const [chat] = await sql<{ id: string }[]>`
-        INSERT INTO chats (session_id, name, status)
-        VALUES (${sessionId}, 'External agent execution', 'open')
-        RETURNING id
-      `;
-      const chatId = chat!.id;
+      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;
 
-      // Link task to session
-      await sql`UPDATE tasks SET session_id = ${sessionId} WHERE id = ${taskId}`;
+        const [chat] = await sql<{ id: string }[]>`
+          INSERT INTO chats (session_id, name, status)
+          VALUES (${sessionId}, 'External agent execution', 'open')
+          RETURNING id
+        `;
+        chatId = chat!.id;
 
-      // Create user message for the task input
-      await sql`
-        INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
-        VALUES (${sessionId}, ${chatId}, 'user', ${task.input}, 'complete', clock_timestamp())
-      `;
+        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');
@@ -251,6 +271,7 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
           agent,
           task: task.input,
           worktreePath,
+          installPath: installPath ?? undefined,
           model: task.model ?? undefined,
           signal: ac.signal,
           log,
@@ -267,6 +288,7 @@ export function createDispatcher(deps: Deps): { start(): void; stop(): Promise<v
           agent,
           task: task.input,
           worktreePath,
+          installPath: installPath ?? undefined,
           model: task.model ?? undefined,
           signal: ac.signal,
           log,

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

@@ -0,0 +1,46 @@
+export interface ProviderDef {
+  name: string;
+  label: string;
+  transport: 'native' | 'acp' | 'pty';
+  modelSource: 'llama-swap' | 'static';
+  staticModels?: Array<{ id: string; label: string }>;
+}
+
+export const PROVIDERS: ProviderDef[] = [
+  {
+    name: 'boocode',
+    label: 'BooCoder',
+    transport: 'native',
+    modelSource: 'llama-swap',
+  },
+  {
+    name: 'opencode',
+    label: 'OpenCode',
+    transport: 'acp',
+    modelSource: 'llama-swap',
+  },
+  {
+    name: 'goose',
+    label: 'Goose',
+    transport: 'acp',
+    modelSource: 'llama-swap',
+  },
+  {
+    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: 'pty',
+    modelSource: 'static',
+  },
+];
+
+export const PROVIDERS_BY_NAME = new Map(PROVIDERS.map((p) => [p.name, p]));

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

@@ -1,19 +1,18 @@
 /**
- * PTY dispatch — runs external agents on the host via SSH.
+ * PTY dispatch — runs external agents directly on the host.
  *
- * For agents without ACP support (claude, pi), we pipe the task into their
- * non-interactive mode and capture stdout/stderr. The agent runs in a git
- * worktree so it can modify files freely.
+ * v2.1.3: Spawns agent binaries directly (no sh -c wrapper) using the
+ * install_path from agent-probe. Follows Paseo's pattern: direct binary
+ * path + args array + cwd.
  *
  * Supported agents:
  * - claude: `claude -p --model <model>` (print mode, reads task from stdin)
- * - opencode: `echo <task> | opencode` (stdin pipe — exact flags TBD)
- * - qwen: `qwen -p <task> --output-format stream-json` (NDJSON structured output)
- * - goose: stub (not yet supported)
- * - pi: stub (not yet supported)
+ * - opencode: `opencode --model <model>` (stdin pipe)
+ * - qwen: `qwen -p <task> --output-format stream-json`
+ * - goose: `goose run --text <task>`
  */
 import type { FastifyBaseLogger } from 'fastify';
-import { sshSpawnWithStdin } from './ssh.js';
+import { spawn } from 'node:child_process';
 
 export interface DispatchResult {
   exitCode: number;
@@ -26,62 +25,61 @@ export interface PtyDispatchOpts {
   task: string;
   worktreePath: string;
   model?: string;
+  installPath?: string;
   signal?: AbortSignal;
   log: FastifyBaseLogger;
 }
 
-/**
- * Build the shell command that runs the agent non-interactively.
- * The command will be executed inside `cd <worktreePath> && ...`.
- */
-function buildAgentCommand(agent: string, task: string, model?: string): string | null {
-  // Escape the task for embedding in a shell command
-  const escapedTask = task.replace(/'/g, "'\\''");
+interface AgentCommand {
+  binary: string;
+  args: string[];
+  stdin?: string;
+}
+
+function buildAgentCommand(agent: string, task: string, model?: string, installPath?: string): AgentCommand | null {
+  const binary = installPath ?? agent;
 
   switch (agent) {
     case 'claude':
-      // Claude Code's print mode: reads prompt from stdin, runs autonomously, prints result
-      return model
-        ? `echo '${escapedTask}' | claude -p --model '${model}'`
-        : `echo '${escapedTask}' | claude -p`;
+      return {
+        binary,
+        args: model ? ['-p', '--model', model] : ['-p'],
+        stdin: task,
+      };
 
     case 'opencode':
-      // opencode non-interactive: pipe task via stdin
-      // NOTE: exact flags may vary — opencode may need --non-interactive or --pipe
-      return model
-        ? `echo '${escapedTask}' | opencode --model '${model}'`
-        : `echo '${escapedTask}' | opencode`;
+      return {
+        binary,
+        args: model ? ['--model', model] : [],
+        stdin: task,
+      };
 
     case 'qwen':
-      // Qwen Code: structured JSON output mode for parseable events
-      return model
-        ? `qwen -p '${escapedTask}' --model '${model}' --output-format stream-json`
-        : `qwen -p '${escapedTask}' --output-format stream-json`;
+      return {
+        binary,
+        args: model
+          ? ['-p', task, '--model', model, '--output-format', 'stream-json']
+          : ['-p', task, '--output-format', 'stream-json'],
+      };
 
     case 'goose':
-      // Not yet verified for non-interactive use
-      return null;
-
-    case 'pi':
-      // Not yet verified for non-interactive use
-      return null;
+      return {
+        binary,
+        args: model
+          ? ['run', '--text', task, '--model', model]
+          : ['run', '--text', task],
+      };
 
     default:
       return null;
   }
 }
 
-/**
- * Dispatch a task to an external agent via SSH.
- *
- * The agent runs in the worktree directory on the host. stdout/stderr are
- * captured in full and returned. The SSH process is killed on abort signal.
- */
 export async function dispatchViaPty(opts: PtyDispatchOpts): Promise<DispatchResult> {
-  const { agent, task, worktreePath, model, signal, log } = opts;
+  const { agent, task, worktreePath, model, installPath, signal, log } = opts;
 
-  const agentCmd = buildAgentCommand(agent, task, model);
-  if (!agentCmd) {
+  const cmd = buildAgentCommand(agent, task, model, installPath);
+  if (!cmd) {
     return {
       exitCode: 1,
       stdout: '',
@@ -89,22 +87,19 @@ export async function dispatchViaPty(opts: PtyDispatchOpts): Promise<DispatchRes
     };
   }
 
-  // Wrap in cd to the worktree
-  const fullCommand = `cd '${worktreePath.replace(/'/g, "'\\''")}' && ${agentCmd}`;
-
-  log.info({ agent, worktreePath }, 'pty-dispatch: starting');
+  log.info({ agent, binary: cmd.binary, worktreePath }, 'pty-dispatch: starting');
 
   return new Promise<DispatchResult>((resolve, reject) => {
-    const child = sshSpawnWithStdin(fullCommand, '');
-    // Note: sshSpawnWithStdin already closes stdin. For agents that read from
-    // stdin via echo piping, the command itself handles the piping on the remote
-    // side. We just need the SSH tunnel.
+    const child = spawn(cmd.binary, cmd.args, {
+      cwd: worktreePath,
+      stdio: ['pipe', 'pipe', 'pipe'],
+      env: { ...process.env },
+    });
 
-    // Actually, re-think: sshSpawnWithStdin writes input and closes stdin on the
-    // LOCAL ssh process. But the remote command is `echo '...' | agent`, which
-    // provides its own stdin. So we should use sshSpawn (no local stdin needed)
-    // or just let the empty stdin close — the remote shell handles piping internally.
-    // This is fine as-is because the echo piping happens WITHIN the remote shell command.
+    if (cmd.stdin) {
+      child.stdin!.write(cmd.stdin);
+    }
+    child.stdin!.end();
 
     let stdout = '';
     let stderr = '';
@@ -117,7 +112,6 @@ export async function dispatchViaPty(opts: PtyDispatchOpts): Promise<DispatchRes
       if (!killed) {
         killed = true;
         child.kill('SIGTERM');
-        // Give it a moment then force-kill
         setTimeout(() => child.kill('SIGKILL'), 5_000);
       }
     };

apps/coder/src/services/ssh.ts

@@ -1,4 +1,7 @@
 /**
+ * @deprecated v2.1.1 — BooCoder runs on the host now. Use direct spawn/exec instead.
+ * Kept for one release cycle in case of rollback.
+ *
  * SSH helper — spawns commands on the host via SSH.
  *
  * BooCode's container cannot directly spawn host processes (opencode, goose, claude, pi).

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

@@ -142,7 +142,7 @@ 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/web/src/api/client.ts

@@ -13,6 +13,7 @@ import type {
   Skill,
   AskUserAnswer,
   ToolCostStat,
+  Provider,
 } from './types';
 
 export class ApiError extends Error {
@@ -298,6 +299,10 @@ export const api = {
 
   models: () => request<ModelInfo[]>('/api/models'),
 
+  coder: {
+    providers: () => request<Provider[]>('/api/coder/providers'),
+  },
+
   agents: {
     list: (projectId: string) =>
       request<AgentsResponse>(`/api/projects/${projectId}/agents`),

apps/web/src/api/types.ts

@@ -206,6 +206,19 @@ export interface ModelInfo {
   [key: string]: unknown;
 }
 
+export interface ProviderModel {
+  id: string;
+  label: string;
+}
+
+export interface Provider {
+  name: string;
+  label: string;
+  transport: string;
+  installed: boolean;
+  models: ProviderModel[];
+}
+
 export interface SidebarSession {
   id: string;
   name: string;

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/ProviderPicker.tsx

@@ -0,0 +1,178 @@
+import { useEffect, useState } from 'react';
+import { Check, ChevronDown, Cpu } from 'lucide-react';
+import { api } from '@/api/client';
+import type { Provider } from '@/api/types';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+import { BottomSheet } from '@/components/BottomSheet';
+import { useViewport } from '@/hooks/useViewport';
+
+interface Props {
+  provider: string;
+  model: string;
+  onChange: (provider: string, model: string) => void | Promise<void>;
+}
+
+function ProviderModelList({
+  providers,
+  error,
+  currentProvider,
+  currentModel,
+  onPick,
+}: {
+  providers: Provider[] | null;
+  error: string | null;
+  currentProvider: string;
+  currentModel: string;
+  onPick: (provider: string, model: string) => void;
+}) {
+  if (error) {
+    return <div className="px-2 py-1.5 text-xs text-destructive">{error}</div>;
+  }
+  if (providers === null) {
+    return <div className="px-2 py-1.5 text-xs text-muted-foreground">Loading...</div>;
+  }
+
+  const singleProvider = providers.length === 1;
+
+  return (
+    <>
+      {providers.map((p) => (
+        <div key={p.name}>
+          {!singleProvider && (
+            <div className="px-2 pt-2 pb-1 text-[10px] font-medium uppercase tracking-wider text-muted-foreground/70">
+              {p.label}
+            </div>
+          )}
+          {p.models.map((m) => (
+            <button
+              key={`${p.name}:${m.id}`}
+              type="button"
+              onClick={() => onPick(p.name, m.id)}
+              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={`size-3 shrink-0 ${
+                  p.name === currentProvider && m.id === currentModel
+                    ? 'opacity-100'
+                    : 'opacity-0'
+                }`}
+              />
+              <span className="truncate">{m.label}</span>
+            </button>
+          ))}
+        </div>
+      ))}
+    </>
+  );
+}
+
+export function ProviderPicker({ provider, model, onChange }: Props) {
+  const { isMobile } = useViewport();
+  const [providers, setProviders] = useState<Provider[] | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [open, setOpen] = useState(false);
+
+  useEffect(() => {
+    if (!open || providers !== null) return;
+    api.coder
+      .providers()
+      .then(setProviders)
+      .catch((err) =>
+        setError(err instanceof Error ? err.message : 'failed to load providers'),
+      );
+  }, [open, providers]);
+
+  function handlePick(prov: string, mod: string) {
+    setOpen(false);
+    void onChange(prov, mod);
+  }
+
+  const currentProviderLabel =
+    providers?.find((p) => p.name === provider)?.label ?? provider;
+
+  const triggerText = providers && providers.length > 1
+    ? `${currentProviderLabel} / ${model}`
+    : model;
+
+  if (isMobile) {
+    return (
+      <>
+        <button
+          type="button"
+          onClick={() => setOpen(true)}
+          aria-label={`Provider: ${currentProviderLabel}, Model: ${model}`}
+          title={`${currentProviderLabel} / ${model}`}
+          className="inline-flex items-center justify-center min-h-[44px] min-w-[44px] rounded text-muted-foreground hover:text-foreground"
+        >
+          <Cpu className="size-4" />
+        </button>
+        <BottomSheet open={open} onClose={() => setOpen(false)} title="Provider / Model">
+          <div className="px-2 py-2 space-y-1">
+            <ProviderModelList
+              providers={providers}
+              error={error}
+              currentProvider={provider}
+              currentModel={model}
+              onPick={handlePick}
+            />
+          </div>
+        </BottomSheet>
+      </>
+    );
+  }
+
+  return (
+    <DropdownMenu open={open} onOpenChange={setOpen}>
+      <DropdownMenuTrigger asChild>
+        <button
+          type="button"
+          className="text-xs font-mono text-muted-foreground hover:text-foreground flex items-center gap-1 px-1.5 py-0.5 rounded hover:bg-muted/60 max-w-[260px]"
+        >
+          <span className="truncate">{triggerText}</span>
+          <ChevronDown className="size-3 opacity-70 shrink-0" />
+        </button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="max-h-80 overflow-y-auto min-w-[200px]">
+        {error && (
+          <div className="px-2 py-1.5 text-xs text-destructive">{error}</div>
+        )}
+        {providers === null && !error && (
+          <div className="px-2 py-1.5 text-xs text-muted-foreground">Loading...</div>
+        )}
+        {providers && providers.map((p) => {
+          const singleProvider = providers.length === 1;
+          return (
+            <div key={p.name}>
+              {!singleProvider && (
+                <div className="px-2 pt-2 pb-1 text-[10px] font-medium uppercase tracking-wider text-muted-foreground/70 select-none">
+                  {p.label}
+                </div>
+              )}
+              {p.models.map((m) => (
+                <DropdownMenuItem
+                  key={`${p.name}:${m.id}`}
+                  onSelect={() => handlePick(p.name, m.id)}
+                  className="font-mono text-xs"
+                >
+                  <Check
+                    className={`size-3 shrink-0 ${
+                      p.name === provider && m.id === model
+                        ? 'opacity-100'
+                        : 'opacity-0'
+                    }`}
+                  />
+                  {m.label}
+                </DropdownMenuItem>
+              ))}
+            </div>
+          );
+        })}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}

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

@@ -10,6 +10,7 @@
 import { useCallback, useEffect, useRef, useState } from 'react';
 import { Code, Send, Check, X, RefreshCw } from 'lucide-react';
 import { MarkdownRenderer } from '@/components/MarkdownRenderer';
+import { ProviderPicker } from '@/components/ProviderPicker';
 import { cn } from '@/lib/utils';
 
 // ---------------------------------------------------------------------------
@@ -300,6 +301,8 @@ export function CoderPane({ sessionId }: Props) {
   const { changes, loading, refresh, approve, reject } = usePendingChanges(sessionId);
   const [input, setInput] = useState('');
   const [sending, setSending] = useState(false);
+  const [provider, setProvider] = useState('boocode');
+  const [model, setModel] = useState('qwen3.6-35b-a3b-mxfp4');
   const messagesEndRef = useRef<HTMLDivElement>(null);
   const inputRef = useRef<HTMLTextAreaElement>(null);
 
@@ -331,7 +334,11 @@ export function CoderPane({ sessionId }: Props) {
       const res = await fetch(`/api/coder/sessions/${sessionId}/messages`, {
         method: 'POST',
         headers: { 'content-type': 'application/json' },
-        body: JSON.stringify({ content: text }),
+        body: JSON.stringify({
+          content: text,
+          provider: provider !== 'boocode' ? provider : undefined,
+          model: model || undefined,
+        }),
       });
       if (res.ok) {
         const data = await res.json();
@@ -347,7 +354,7 @@ export function CoderPane({ sessionId }: Props) {
     } finally {
       setSending(false);
     }
-  }, [input, sending, sessionId, setMessages]);
+  }, [input, sending, sessionId, provider, model, setMessages]);
 
   const handleKeyDown = useCallback(
     (e: React.KeyboardEvent) => {
@@ -363,11 +370,18 @@ export function CoderPane({ sessionId }: Props) {
     <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>
+        <Code size={14} className="text-muted-foreground shrink-0" />
+        <ProviderPicker
+          provider={provider}
+          model={model}
+          onChange={(prov, mod) => {
+            setProvider(prov);
+            setModel(mod);
+          }}
+        />
         <span
           className={cn(
-            'inline-block w-1.5 h-1.5 rounded-full ml-auto',
+            'inline-block w-1.5 h-1.5 rounded-full ml-auto shrink-0',
             connected ? 'bg-green-500' : 'bg-red-500'
           )}
           title={connected ? 'Connected' : 'Disconnected'}

docker-compose.yml

@@ -10,6 +10,7 @@ services:
       CODECONTEXT_URL: http://codecontext:8080
       CONTAINER_GUIDANCE_FILE: /app/BOOCHAT.md
       DATABASE_URL: postgres://boocode:${POSTGRES_PASSWORD}@boocode_db:5432/boochat
+      BOOCODER_URL: http://100.114.205.53:9502
     volumes:
       - /opt:/opt
       - /opt/projects:/opt/projects:rw
@@ -50,27 +51,29 @@ services:
     networks:
       - boocode_net
 
-  boocoder:
-    build:
-      context: .
-      dockerfile: apps/coder/Dockerfile
-    container_name: boocoder
-    restart: unless-stopped
-    ports:
-      - "100.114.205.53:9502:3000"
-    env_file: .env
-    environment:
-      CONTAINER_GUIDANCE_FILE: /app/BOOCODER.md
-      DATABASE_URL: postgres://boocode:${POSTGRES_PASSWORD}@boocode_db:5432/boochat
-    volumes:
-      - /opt:/opt:rw
-      - /opt/projects:/opt/projects:rw
-      - ./data:/data
-      - /opt/boocode/BOOCODER.md:/app/BOOCODER.md:ro
-    depends_on:
-      - boocode_db
-    networks:
-      - boocode_net
+  # v2.1.1: boocoder moved to systemd service on host (boocoder.service).
+  # Kept commented for rollback reference.
+  # boocoder:
+  #   build:
+  #     context: .
+  #     dockerfile: apps/coder/Dockerfile
+  #   container_name: boocoder
+  #   restart: unless-stopped
+  #   ports:
+  #     - "100.114.205.53:9502:3000"
+  #   env_file: .env
+  #   environment:
+  #     CONTAINER_GUIDANCE_FILE: /app/BOOCODER.md
+  #     DATABASE_URL: postgres://boocode:${POSTGRES_PASSWORD}@boocode_db:5432/boochat
+  #   volumes:
+  #     - /opt:/opt:rw
+  #     - /opt/projects:/opt/projects:rw
+  #     - ./data:/data
+  #     - /opt/boocode/BOOCODER.md:/app/BOOCODER.md:ro
+  #   depends_on:
+  #     - boocode_db
+  #   networks:
+  #     - boocode_net
 
   boocode_db:
     image: postgres:16-alpine