v1.8.2: tool loop cap-hit summary + tool call UI compaction

Old hardcoded MAX_TOOL_LOOP_DEPTH=15 replaced by per-agent
max_tool_calls (1-100, AGENTS.md frontmatter) with defaults: 30 for
read-only-only agents, 10 for agents that include any non-read-only
tool, 15 for raw chat. When the loop hits cap, fire one final summary
call with tools disabled, stream the wrap-up into the in-flight
assistant message, then insert a system sentinel with
metadata.kind='cap_hit'. The sentinel renders an amber bubble with a
Continue button (latest sentinel only) that POSTs to a new
/api/chats/:id/continue route to extend. Hard ceiling: 3 cap-hits per
chat (2 continues max) — third sentinel reports can_continue=false.

Error frames carry a machine-readable reason code alongside human
error text. Failed messages persist the reason via
metadata.kind='error' so the bubble renders specifics on reload (WS
error frame is one-shot).

Tool call UI rewired: ToolCallLine renders inline (↳ name args
spinner/check/✗, expand-on-tap for args+result); ToolCallGroup
collapses 3+ consecutive same-tool runs into a compact card.
MessageList owns a three-pass pre-render (flatten + fold tool
results onto matching runs by id + group same-tool runs + number
sentinels). MessageBubble drops tool rendering and adds the
sentinel / error-reason branches. ToolCallCard deleted.

Roadmap follow-up logged: add explicit max_tool_calls: 30 to the 6
agents in /data/AGENTS.md and /opt/boocode/AGENTS.md post-ship for
discoverability (defaults handle behavior identically).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -6,3 +6,4 @@ dist
 .vite
 coverage
 secrets/
+data/

AGENTS.md

@@ -0,0 +1,197 @@
+# Agents
+
+## Code Reviewer
+---
+temperature: 0.3
+tools: [view_file, list_dir, grep, find_files]
+description: Reviews code for bugs, security issues, and maintainability. Read-only.
+---
+You review code. Find real problems, not style nits.
+
+Process:
+1. Read the file(s) in question with view_file. If a diff is provided, read surrounding context too.
+2. Use grep/find_files to check how changed symbols are used elsewhere.
+3. Cite every finding as file:line.
+
+Prioritize in order:
+1. Bugs and logic errors
+2. Security issues (injection, auth bypass, secret leakage, unsafe deserialization, SSRF, path traversal)
+3. Race conditions, error handling, resource leaks
+4. Performance issues with measurable impact
+5. Maintainability (only if it blocks future work)
+
+Skip: formatting, naming preferences, "consider extracting", "add a comment here". The user has a linter.
+
+Output format:
+- Critical: <file:line> — <issue> — <fix>
+- Major: <file:line> — <issue> — <fix>
+- Minor: <file:line> — <issue> — <fix>
+
+If nothing critical or major, say so in one line. Do not pad.
+
+
+## Debugger
+---
+temperature: 0.2
+tools: [view_file, list_dir, grep, find_files]
+description: Diagnoses bugs from error messages, logs, or described symptoms.
+---
+You diagnose bugs. Form a hypothesis, prove it with evidence from the code.
+
+Process:
+1. Restate the symptom in one line. Confirm you understand it.
+2. Read the error/stacktrace. Identify the exact frame where things go wrong.
+3. view_file on that frame. Read 50 lines around it.
+4. grep for callers, related state, recent changes that could explain it.
+5. State the root cause with file:line evidence.
+6. Propose the minimal fix. Note any side effects.
+
+Rules:
+- Never guess. If evidence is missing, say what you need (specific log line, specific file, specific repro step).
+- Distinguish symptom from cause. A null check fixes the symptom; missing init causes it.
+- Off-by-one, race conditions, and silent except blocks are common — check for them.
+- If two plausible causes exist, name both and say what would discriminate.
+
+Output:
+- Symptom: <one line>
+- Root cause: <file:line> — <explanation>
+- Fix: <minimal diff or description>
+- Risk: <what could break>
+
+
+## Refactorer
+---
+temperature: 0.3
+tools: [view_file, list_dir, grep, find_files]
+description: Proposes refactors for clarity, deduplication, or decoupling. Read-only — outputs plans, not edits.
+---
+You propose refactors. You do not apply them. The user applies via OpenCode or Claude Code.
+
+Process:
+1. Read the target file(s).
+2. grep for callers, duplicates, and similar patterns elsewhere in the repo.
+3. Identify the smallest refactor that delivers the goal.
+
+Prioritize:
+1. Deduplication where 3+ sites have near-identical logic
+2. Extracting a function/module when one is doing two unrelated jobs
+3. Decoupling when a change in A forces a change in B unnecessarily
+4. Renaming when a name actively misleads
+
+Reject:
+- Refactors that touch 10+ files for marginal gain
+- "Modernization" with no concrete benefit
+- Abstraction for future flexibility that may never come
+- Style-only changes
+
+Output:
+- Goal: <one line>
+- Scope: <files affected, count of lines roughly>
+- Plan: numbered steps, each one self-contained
+- Risk: <what tests must pass, what could regress>
+- Skip if: <conditions under which this refactor is not worth doing>
+
+
+## Architect
+---
+temperature: 0.5
+tools: [view_file, list_dir, grep, find_files]
+description: Designs new features, modules, or architectural changes. Outputs a build plan.
+---
+You design. You produce build plans, not code.
+
+Process:
+1. Restate the goal in your own words. Confirm constraints (perf, deploy, deps).
+2. list_dir the relevant areas. Read existing patterns — match them unless there's a reason not to.
+3. Decide: extend existing code or add new module. Justify.
+4. Sketch the data flow: inputs → transforms → outputs → side effects.
+5. Identify integration points: DB schema, API surface, env vars, container boundaries.
+6. List failure modes and how the design handles them.
+
+Rules:
+- Reuse before inventing. If a service/lib in the repo already does this, say so.
+- Prefer boring tech. New deps require justification.
+- Tailscale IPs for internal routing. No 0.0.0.0 binds.
+- Least privilege: separate read/write paths, explicit auth gates.
+- State assumptions inline. Do not ask clarifying questions mid-design unless blocked.
+
+Output:
+- Goal
+- Existing code to reuse: <file paths>
+- New code: <file paths, one-line purpose each>
+- Data model changes: <SQL or schema diff>
+- API surface: <endpoints, request/response shapes>
+- Failure modes: <list>
+- Build order: numbered, each step 30-90 min
+
+
+## Security Auditor
+---
+temperature: 0.2
+tools: [view_file, list_dir, grep, find_files]
+description: Audits code for security vulnerabilities. Read-only.
+---
+You audit for security issues. Concrete findings only, no generic warnings.
+
+Process:
+1. Identify the trust boundary: where does untrusted input enter? Where does it leave?
+2. Trace input flow with grep. Mark every transformation.
+3. Check each finding against a real attack scenario.
+
+Look for:
+- Injection: SQL (raw queries, string concat into queries), command (subprocess with shell=True, unescaped args), XSS (unescaped output in HTML/JSX), template injection, NoSQL injection
+- AuthN/AuthZ: missing checks on routes, IDOR (user-supplied IDs without ownership check), JWT misuse (alg=none, weak secret, no expiry), session fixation
+- Secrets: hardcoded keys/passwords, .env in repo, secrets in logs, secrets in error messages
+- Crypto: weak hashes (MD5, SHA1 for passwords), missing salt, predictable randomness (Math.random for tokens), ECB mode, custom crypto
+- Network: SSRF (user URL → server fetch), open CORS, missing CSRF on state-changing requests, plaintext over public network
+- File: path traversal, unrestricted upload type/size, zip slip
+- Deserialization: pickle, yaml.load, eval, exec on user input
+- Resource: missing rate limits on auth/expensive endpoints, unbounded query results
+
+For each finding:
+- Severity: Critical / High / Medium / Low
+- Location: file:line
+- Attack scenario: one sentence describing how an attacker exploits this
+- Fix: minimal change
+
+Skip:
+- Generic "use HTTPS" advice
+- "Consider adding rate limiting" without a specific endpoint
+- CVE-of-the-week scares without proof the code is affected
+
+If the code is clean, say so. Do not invent findings.
+
+
+## Prompt Builder
+---
+temperature: 0.4
+tools: [view_file, list_dir, grep, find_files]
+description: Builds prompts for OpenCode, Claude Code, or BooCode dispatch.
+---
+You write prompts that another coding agent will execute. Your output is the prompt, not the work.
+
+Process:
+1. Ask the user (or read context) for: goal, target repo, target files if known, constraints.
+2. list_dir and view_file the target area. Confirm files exist and are roughly the shape you think.
+3. Identify imports, exports, and conventions in the repo (component layout, error handling style, test framework).
+4. Write the prompt.
+
+Prompt structure:
+- One-line goal at the top
+- Constraints block: don't commit, don't push, don't pull. Use `#careful` and `#nofluff` style hashtags if the target agent honors them
+- Pre-flight: list_dir or grep commands the agent must run before writing (e.g. "run: ls frontend/src/components/ui/ and only import primitives that exist")
+- Files to modify: explicit paths
+- Files to create: explicit paths with one-line purpose
+- Behavior spec: numbered, testable
+- Backup rule: `cp file file.bak-$(date +%Y%m%d)` before any destructive edit
+- Verification: `py_compile`, `tsc --noEmit`, `docker compose up --build -d` — whichever applies
+- Stop conditions: when to halt and report instead of pressing on
+
+Rules:
+- Tailored to the target agent: OpenCode honors hashtag snippets and skills; Claude Code honors CLAUDE.md and slash commands; BooCode batches are written as user-facing markdown
+- Never include credentials or secrets
+- Never instruct the agent to commit or push
+- Include the exact model the user wants if dispatch is via Paseo or BooCode batch
+- For BooLab frontend prompts, always include the "verify shadcn primitives exist" preflight
+
+Output: the prompt, ready to paste. Nothing else.

CLAUDE.md

@@ -31,7 +31,7 @@ npx tsc -p apps/web/tsconfig.app.json --noEmit  # web app specifically
 docker compose build --no-cache boocode && docker compose up -d
 ```
 
-There are no tests or linters configured.
+Tests: `pnpm -C apps/server test` runs 23 vitest tests. No test harness on `apps/web` (adding it requires installing vitest as a new devDep). Vitest pinned to `^3` because Vite 5 / vitest 4 are incompatible. No linters configured.
 
 ## Architecture
 
@@ -44,7 +44,7 @@ There are no tests or linters configured.
 - **Zod** for request validation and config parsing.
 
 Key services:
-- **`services/inference.ts`** — Streams LLM responses, executes tool loops (max 5 depth), flushes to DB every 500ms. Publishes `InferenceFrame` events through the broker.
+- **`services/inference.ts`** — Streams LLM responses, executes tool loops (max depth 15, see `MAX_TOOL_LOOP_DEPTH`), flushes to DB every 500ms. Publishes `InferenceFrame` events through the broker.
 - **`services/broker.ts`** — In-memory pub/sub with two channel types: per-session (message streaming) and per-user (sidebar updates). No persistence; clients reconnect on restart.
 - **`services/tools.ts`** — Four read-only file tools exposed as OpenAI function-calling schemas. All file access goes through `path_guard.ts` which resolves against project root.
 - **`services/file_ops.ts`** — Shared file operation implementations used by both inference tools and HTTP routes.
@@ -57,6 +57,7 @@ Route registration: all routes registered in `index.ts` via `register*Routes(app
 - **React 18** + React Router v6 + **Tailwind v4** + shadcn/radix-ui primitives.
 - **Shiki** for syntax highlighting (async `codeToHtml` in `CodeBlock.tsx` and `FileViewer` in `FileBrowserPane.tsx`).
 - Path alias: `@/` maps to `src/`.
+- **Mobile interaction primitives** (post-v1.6): `useViewport` (matchMedia, breakpoints mobile <768 / tablet 768–1023 / desktop ≥1024), `useSidebarDrawer` / `useRightRailDrawer` (Context + auto-close on `useLocation().pathname` change), `useLongPress` (500ms timer, dispatches synthetic `contextmenu` on `[data-tab-id]`), `usePullToRefresh` (80px threshold, 600ms hold), `SwipeablePaneTab` (60px close, 30px vertical bail). Tap-target convention: `max-md:min-h-[44px] max-md:min-w-[44px]`. Mobile headers: `border-b px-3 sm:px-4 py-2` + `style={{ paddingTop: 'max(0.5rem, env(safe-area-inset-top))' }}`. Hamburger left, FolderTree right.
 
 Key patterns:
 - **`hooks/sessionEvents.ts`** — Module-singleton event bus (Set of listeners). Used for cross-component communication: session renames, file-open events, attachment dispatch. 9 event types in the discriminated union. When adding a new event type to the `SessionEvent` union, you must also add a case to the `applyEvent` switch in `useSidebar.ts` (even if it's a no-op `return prev`).
@@ -76,7 +77,7 @@ Key patterns:
 
 ### Multi-pane workspace
 
-Sessions hold 1–5 panes (chat / empty / placeholder terminal+agent). Workspace pane state is **client-side only** (localStorage keyed by sessionId); the legacy `session_panes` table is deprecated. Each chat lives in at most one pane; tab strip is per-pane and tracks `chatIds[]` + `activeChatIdx`. Sessions 1:N chats; chats own messages. Tab reorder via native HTML5 drag events.
+Sessions hold 1–5 panes (chat / empty / placeholder terminal+agent). Workspace pane state is **client-side only** (localStorage key `boocode.workspace.panes.<sessionId>`); the legacy `session_panes` table and its REST endpoints are deprecated — no `/api/panes/*` routes exist. Each chat lives in at most one pane; tab strip is per-pane and tracks `chatIds[]` + `activeChatIdx`. Sessions 1:N chats; chats own messages. Tab reorder via native HTML5 drag events.
 
 ## Database
 
@@ -94,6 +95,7 @@ Required: `DATABASE_URL`, `LLAMA_SWAP_URL`. Optional: `PORT` (3000), `HOST` (0.0
 
 - Sam reviews all diffs and commits manually. Do not commit unless explicitly asked.
 - 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.
 - 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).

apps/server/src/index.ts

@@ -14,6 +14,7 @@ import { registerChatRoutes } from './routes/chats.js';
 import { registerSidebarRoutes } from './routes/sidebar.js';
 import { registerWebSocket } from './routes/ws.js';
 import { registerModelRoutes } from './routes/models.js';
+import { registerAgentRoutes } from './routes/agents.js';
 import { createInferenceRunner } from './services/inference.js';
 import { createBroker } from './services/broker.js';
 
@@ -57,6 +58,7 @@ async function main() {
   registerSessionRoutes(app, sql, config, broker);
   registerSettingsRoutes(app, sql);
   registerModelRoutes(app, config);
+  registerAgentRoutes(app, sql);
   registerSidebarRoutes(app, sql);
   registerChatRoutes(app, sql, broker);
 

apps/server/src/routes/__tests__/projects.test.ts

@@ -71,22 +71,14 @@ describe('resolveProjectPath', () => {
     expect(result.error.toLowerCase()).toContain('path must be under');
   });
 
-  it('BEHAVIOR GAP: currently accepts the whitelist itself as a project root', async () => {
-    // SPEC says: the whitelist directory itself should be rejected — a
-    // project's parent can't be the project. The current implementation does
-    // NOT enforce this: the scope check is
-    //   if (real !== whitelistReal && !real.startsWith(whitelistReal + sep))
-    // which evaluates to false when real === whitelistReal, so the whitelist
-    // path falls through and is accepted as a valid project root.
-    //
-    // This test documents the ACTUAL current behavior. Reported as a bug in
-    // the harness report; not silently fixed here. To tighten the check,
-    // change the condition to:
-    //   if (!real.startsWith(whitelistReal + sep))
+  it('rejects the whitelist directory itself as a project root', async () => {
+    // A project's parent can't be the project. The scope check must require
+    // the candidate path to be strictly below the whitelist (whitelist + sep
+    // prefix), not just equal to it.
     const result = await resolveProjectPath(whitelist, whitelist);
-    expect('error' in result).toBe(false);
-    if ('error' in result) return;
-    expect(result.real).toBe(whitelist);
+    expect('error' in result).toBe(true);
+    if (!('error' in result)) return;
+    expect(result.error.toLowerCase()).toContain('path must be under');
   });
 
   it('rejects non-directory targets (file under whitelist)', async () => {

apps/server/src/routes/agents.ts

@@ -0,0 +1,20 @@
+import type { FastifyInstance } from 'fastify';
+import type { Sql } from '../db.js';
+import { getAgentsForProject } from '../services/agents.js';
+
+export function registerAgentRoutes(app: FastifyInstance, sql: Sql): void {
+  app.get<{ Params: { id: string } }>(
+    '/api/projects/:id/agents',
+    async (req, reply) => {
+      const rows = await sql<{ path: string }[]>`
+        SELECT path FROM projects WHERE id = ${req.params.id}
+      `;
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'project not found' };
+      }
+      // getAgentsForProject handles AGENTS.md presence/parse/cache; never throws.
+      return await getAgentsForProject(rows[0]!.path);
+    }
+  );
+}

apps/server/src/routes/chats.ts

@@ -231,7 +231,7 @@ export function registerChatRoutes(
           INSERT INTO messages (
             session_id, chat_id, role, content, kind, tool_calls, tool_results,
             status, tokens_used, ctx_used, ctx_max, started_at, finished_at,
-            created_at
+            created_at, metadata
           )
           SELECT
             ${source.session_id}, ${chat!.id}, role, content, kind,
@@ -239,7 +239,8 @@ export function registerChatRoutes(
             tokens_used, ctx_used, ctx_max, started_at, finished_at,
             clock_timestamp() + (
               ROW_NUMBER() OVER (ORDER BY created_at ASC, id ASC) * INTERVAL '1 microsecond'
-            )
+            ),
+            metadata
           FROM messages
           WHERE chat_id = ${source.id}
             AND created_at <= ${target.created_at}::timestamptz
@@ -268,7 +269,7 @@ export function registerChatRoutes(
       }
       const rows = await sql<Message[]>`
         SELECT id, session_id, chat_id, role, content, kind, tool_calls, tool_results, status, last_seq,
-               tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at
+               tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at, metadata
         FROM messages
         WHERE chat_id = ${req.params.id}
         ORDER BY created_at ASC, id ASC

apps/server/src/routes/messages.ts

@@ -7,6 +7,13 @@ const SendBody = z.object({
   content: z.string().min(1).max(64_000),
 });
 
+// v1.8.2: Continue extends an inference loop that hit the tool budget. Caller
+// passes the sentinel message it's continuing from; server validates shape
+// and the per-chat hard ceiling before resuming.
+const ContinueBody = z.object({
+  sentinel_message_id: z.string().uuid(),
+});
+
 interface MessageHandlers {
   enqueueInference: (sessionId: string, chatId: string, assistantMessageId: string, user: string) => void;
   enqueueCompact: (sessionId: string, chatId: string, compactMessageId: string, user: string) => void;
@@ -36,7 +43,7 @@ export function registerMessageRoutes(
       }
       const rows = await sql<Message[]>`
         SELECT id, session_id, chat_id, role, content, kind, tool_calls, tool_results, status, last_seq,
-               tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at
+               tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at, metadata
         FROM messages
         WHERE session_id = ${req.params.id}
         ORDER BY created_at ASC, id ASC
@@ -253,6 +260,76 @@ export function registerMessageRoutes(
     }
   );
 
+  app.post<{ Params: { id: string } }>(
+    '/api/chats/:id/continue',
+    async (req, reply) => {
+      const parsed = ContinueBody.safeParse(req.body);
+      if (!parsed.success) {
+        reply.code(400);
+        return { error: 'invalid body', details: parsed.error.flatten() };
+      }
+
+      const chatRows = await sql<Chat[]>`
+        SELECT id, session_id FROM chats WHERE id = ${req.params.id} AND status = 'open'
+      `;
+      if (chatRows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const chat = chatRows[0]!;
+      const sessionId = chat.session_id;
+
+      // Cap-hit sentinels are only ever inserted after a turn completes, so
+      // there must not be an active inference at this moment. If there is,
+      // the client is racing the cap-hit summary that just emitted the
+      // sentinel — bail rather than enqueue a parallel run.
+      if (handlers.hasActiveInference(chat.id)) {
+        reply.code(409);
+        return { error: 'chat is currently streaming' };
+      }
+
+      const sentinel = await sql<{ metadata: { kind?: unknown; can_continue?: unknown } | null }[]>`
+        SELECT metadata
+        FROM messages
+        WHERE id = ${parsed.data.sentinel_message_id}
+          AND chat_id = ${chat.id}
+          AND role = 'system'
+      `;
+      if (sentinel.length === 0) {
+        reply.code(404);
+        return { error: 'sentinel not found' };
+      }
+      const meta = sentinel[0]!.metadata;
+      if (!meta || meta.kind !== 'cap_hit') {
+        reply.code(400);
+        return { error: 'message is not a cap-hit sentinel' };
+      }
+      // Server-side hard ceiling check. UI already disables the button when
+      // can_continue is false; defending against a stale tab or a direct
+      // API hit is the only reason this lives on the server too.
+      if (meta.can_continue !== true) {
+        reply.code(409);
+        return { error: 'hard limit reached for this chat' };
+      }
+
+      const result = await sql.begin(async (tx) => {
+        const [assistantMsg] = await tx<{ id: string }[]>`
+          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+          VALUES (${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 { assistant_message_id: assistantMsg!.id };
+      });
+
+      handlers.enqueueInference(sessionId, chat.id, result.assistant_message_id, 'default');
+
+      reply.code(202);
+      return result;
+    }
+  );
+
   app.post<{ Params: { id: string } }>(
     '/api/chats/:id/force_send',
     async (req, reply) => {

apps/server/src/routes/projects.ts

@@ -9,6 +9,7 @@ import type { Project, AvailableProject } from '../types/api.js';
 import { resolveProjectRoot, PathScopeError } from '../services/path_guard.js';
 import { listDir, viewFile } from '../services/file_ops.js';
 import { getProjectFiles } from '../services/file_index.js';
+import { getGitMeta } from '../services/git_meta.js';
 import {
   bootstrapProject,
   BootstrapNameError,
@@ -53,7 +54,7 @@ export async function resolveProjectPath(
     return { error: 'path does not exist' };
   }
   const whitelistReal = await realpath(whitelist);
-  if (real !== whitelistReal && !real.startsWith(whitelistReal + sep)) {
+  if (!real.startsWith(whitelistReal + sep)) {
     return { error: `path must be under ${whitelist}` };
   }
   if (!(await isDir(real))) return { error: 'path is not a directory' };
@@ -381,6 +382,38 @@ export function registerProjectRoutes(
     }
   );
 
+  // GET /api/projects/:id/git
+  // v1.8 mobile-tabs: feeds the header branch indicator and is the same
+  // resolver the model's git_status tool uses. Returns 200 with branch=null
+  // for non-git directories (not 404) so the UI can degrade gracefully.
+  app.get<{ Params: { id: string } }>(
+    '/api/projects/:id/git',
+    async (req, reply) => {
+      const { id } = req.params;
+      const rows = await sql<Project[]>`
+        SELECT id, name, path, added_at, last_session_id, status, gitea_remote
+        FROM projects WHERE id = ${id}
+      `;
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'not found' };
+      }
+      const project = rows[0]!;
+      let projectRoot: string;
+      try {
+        projectRoot = await resolveProjectRoot(project.path);
+      } catch (err) {
+        if (err instanceof PathScopeError) {
+          reply.code(404);
+          return { error: err.message };
+        }
+        throw err;
+      }
+      const meta = await getGitMeta(projectRoot);
+      return meta ?? { branch: null, is_dirty: false, ahead: 0, behind: 0 };
+    }
+  );
+
   // GET /api/projects/:id/files
   app.get<{ Params: { id: string } }>(
     '/api/projects/:id/files',

apps/server/src/routes/sessions.ts

@@ -5,17 +5,20 @@ import type { Config } from '../config.js';
 import type { Broker } from '../services/broker.js';
 import type { Session } from '../types/api.js';
 import { getSetting } from './settings.js';
+import { getAgentsForProject } from '../services/agents.js';
 
 const CreateBody = z.object({
   name: z.string().min(1).max(200).optional(),
   model: z.string().min(1).max(200).optional(),
   system_prompt: z.string().max(8000).optional(),
+  agent_id: z.string().min(1).max(200).nullable().optional(),
 });
 
 const PatchBody = z.object({
   name: z.string().min(1).max(200).optional(),
   model: z.string().min(1).max(200).optional(),
   system_prompt: z.string().max(8000).optional(),
+  agent_id: z.string().min(1).max(200).nullable().optional(),
 });
 
 async function resolveDefaultModel(sql: Sql, config: Config): Promise<string> {
@@ -24,6 +27,13 @@ async function resolveDefaultModel(sql: Sql, config: Config): Promise<string> {
   return config.DEFAULT_MODEL;
 }
 
+// First agent in the project's effective list (file-defined or builtin),
+// or null if somehow none exist.
+async function resolveDefaultAgent(projectPath: string): Promise<string | null> {
+  const { agents } = await getAgentsForProject(projectPath);
+  return agents[0]?.id ?? null;
+}
+
 export function registerSessionRoutes(
   app: FastifyInstance,
   sql: Sql,
@@ -40,7 +50,7 @@ export function registerSessionRoutes(
       }
       const status = req.query.status === 'archived' ? 'archived' : 'open';
       const rows = await sql<Session[]>`
-        SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at
+        SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
         FROM sessions
         WHERE project_id = ${req.params.id} AND status = ${status}
         ORDER BY updated_at DESC
@@ -57,11 +67,14 @@ export function registerSessionRoutes(
         reply.code(400);
         return { error: 'invalid body', details: parsed.error.flatten() };
       }
-      const project = await sql`SELECT id FROM projects WHERE id = ${req.params.id}`;
+      const project = await sql<{ id: string; path: string }[]>`
+        SELECT id, path FROM projects WHERE id = ${req.params.id}
+      `;
       if (project.length === 0) {
         reply.code(404);
         return { error: 'project not found' };
       }
+      const projectPath = project[0]!.path;
 
       let model = parsed.data.model;
       if (!model) {
@@ -76,12 +89,18 @@ export function registerSessionRoutes(
 
       const name = parsed.data.name ?? 'New session';
       const systemPrompt = parsed.data.system_prompt ?? '';
+      // If the client provided agent_id (string or null), use it; otherwise
+      // resolve to the project's first agent (file-defined or builtin), or null.
+      const agentId =
+        parsed.data.agent_id !== undefined
+          ? parsed.data.agent_id
+          : await resolveDefaultAgent(projectPath);
 
       const row = await sql.begin(async (tx) => {
         const [session] = await tx<Session[]>`
-          INSERT INTO sessions (project_id, name, model, system_prompt)
-          VALUES (${req.params.id}, ${name}, ${model}, ${systemPrompt})
-          RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
+          INSERT INTO sessions (project_id, name, model, system_prompt, agent_id)
+          VALUES (${req.params.id}, ${name}, ${model}, ${systemPrompt}, ${agentId})
+          RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
         `;
         await tx`
           INSERT INTO chats (session_id, name, status)
@@ -101,7 +120,7 @@ export function registerSessionRoutes(
 
   app.get<{ Params: { id: string } }>('/api/sessions/:id', async (req, reply) => {
     const rows = await sql<Session[]>`
-      SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at
+      SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
       FROM sessions WHERE id = ${req.params.id}
     `;
     if (rows.length === 0) {
@@ -120,22 +139,36 @@ export function registerSessionRoutes(
         return { error: 'invalid body', details: parsed.error.flatten() };
       }
       const { name, model, system_prompt } = parsed.data;
+      // agent_id is tri-state on the wire: omitted = no change, null = clear,
+      // string = set. CASE WHEN inside SET handles all three atomically.
+      const agentIdProvided = parsed.data.agent_id !== undefined;
+      const newAgentId = parsed.data.agent_id ?? null;
+      // Read the prior name so the post-update publish can skip no-op renames
+      // (PATCH { name: "Foo" } where the session is already "Foo"). The window
+      // between SELECT and UPDATE is sub-millisecond in the same request handler;
+      // a concurrent rename in that gap would just mean one stale publish, which
+      // existing clients dedup by id.
+      const before = await sql<{ name: string }[]>`
+        SELECT name FROM sessions WHERE id = ${req.params.id}
+      `;
+      const priorName = before[0]?.name;
       const rows = await sql<Session[]>`
         UPDATE sessions
         SET
           name = COALESCE(${name ?? null}, name),
           model = COALESCE(${model ?? null}, model),
           system_prompt = COALESCE(${system_prompt ?? null}, system_prompt),
+          agent_id = CASE WHEN ${agentIdProvided} THEN ${newAgentId} ELSE agent_id END,
           updated_at = clock_timestamp()
         WHERE id = ${req.params.id}
-        RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
+        RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
       `;
       if (rows.length === 0) {
         reply.code(404);
         return { error: 'session not found' };
       }
       const session = rows[0]!;
-      if (name !== undefined) {
+      if (name !== undefined && session.name !== priorName) {
         broker.publishUser('default', {
           type: 'session_renamed',
           session_id: session.id,
@@ -174,7 +207,7 @@ export function registerSessionRoutes(
       const rows = await sql<Session[]>`
         UPDATE sessions SET status = 'open', updated_at = clock_timestamp()
         WHERE id = ${req.params.id} AND status = 'archived'
-        RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
+        RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
       `;
       if (rows.length === 0) {
         reply.code(404);

apps/server/src/routes/ws.ts

@@ -23,7 +23,7 @@ export function registerWebSocket(
 
       const messages = await sql<Message[]>`
         SELECT id, session_id, chat_id, role, content, kind, tool_calls, tool_results, status, last_seq,
-               tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at
+               tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at, metadata
         FROM messages
         WHERE session_id = ${sessionId}
         ORDER BY created_at ASC, id ASC

apps/server/src/schema.sql

@@ -153,3 +153,15 @@ BEGIN
       CHECK (status IN ('open', 'archived'));
   END IF;
 END $$;
+
+-- v1.x-batch9: per-session agent reference. Agent definitions are not stored in
+-- the DB; they live in builtins (services/agents.ts) and a per-project AGENTS.md.
+-- agent_id is the slugified agent name. NULL means "use BooCode defaults".
+ALTER TABLE sessions ADD COLUMN IF NOT EXISTS agent_id TEXT;
+
+-- v1.8.2: per-message metadata for sentinels (cap-hit) and structured error
+-- reasons. JSONB so future kinds can extend without further schema churn.
+-- Shape for cap_hit:  { kind: 'cap_hit', used: number, limit: number,
+--                       agent_name: string|null, can_continue: boolean }
+-- Shape for errors:   { error_reason: 'llm_provider_error'|..., error_text: string }
+ALTER TABLE messages ADD COLUMN IF NOT EXISTS metadata JSONB;

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

@@ -21,6 +21,7 @@ function makeSession(overrides: Partial<Session> = {}): Session {
     status: 'open',
     created_at: new Date(0).toISOString(),
     updated_at: new Date(0).toISOString(),
+    agent_id: null,
     ...overrides,
   };
 }
@@ -62,6 +63,7 @@ function makeMessage(
     started_at: null,
     finished_at: null,
     created_at: new Date(counter * 1000).toISOString(),
+    metadata: null,
     ...overrides,
   };
 }

apps/server/src/services/agents.ts

@@ -0,0 +1,320 @@
+import { promises as fs } from 'node:fs';
+import { join } from 'node:path';
+import type { Agent, AgentsResponse, AgentParseError } from '../types/api.js';
+
+// v1.8.1: global agents live at /data/AGENTS.md inside the container
+// (./data:/data:ro mount on the host). Per-project AGENTS.md at the project
+// root overrides global by name. In-code builtins are gone — the seed file is
+// the contents of the previous BUILTIN_AGENTS list, copied into /data/AGENTS.md
+// once on first deploy.
+const GLOBAL_AGENTS_PATH = '/data/AGENTS.md';
+const CACHE_TTL_MS = 60_000;
+
+// Tools whitelist universe matches services/tools.ts ALL_TOOLS. Keep in sync.
+const ALL_TOOL_NAMES = ['view_file', 'list_dir', 'grep', 'find_files', 'git_status'] as const;
+const DEFAULT_TOOLS: string[] = [...ALL_TOOL_NAMES];
+const DEFAULT_TEMPERATURE = 0.7;
+
+export function slugify(name: string): string {
+  return name
+    .toLowerCase()
+    .replace(/[^a-z0-9]+/g, '-')
+    .replace(/^-+|-+$/g, '');
+}
+
+// ---- AGENTS.md parser ------------------------------------------------------
+
+interface ParsedFrontmatter {
+  temperature?: number;
+  tools?: string[];
+  description?: string;
+  model?: string;
+  // v1.8.2: optional per-agent tool-loop budget. Absent → inference resolves
+  // from the agent's toolset at runtime.
+  max_tool_calls?: number;
+}
+
+function stripQuotes(s: string): string {
+  if (
+    s.length >= 2 &&
+    (s[0] === '"' || s[0] === "'") &&
+    s[0] === s[s.length - 1]
+  ) {
+    return s.slice(1, -1);
+  }
+  return s;
+}
+
+function parseFrontmatter(yaml: string): { data: ParsedFrontmatter; errors: string[] } {
+  const data: ParsedFrontmatter = {};
+  const errors: string[] = [];
+  const lines = yaml.split('\n');
+  let arrayKey: 'tools' | null = null;
+
+  for (const rawLine of lines) {
+    const line = rawLine.trim();
+    if (line.length === 0) continue;
+
+    // Block-list continuation: "- value" under a key that was set to empty
+    if (arrayKey && line.startsWith('- ')) {
+      data[arrayKey]!.push(line.slice(2).trim());
+      continue;
+    }
+    arrayKey = null;
+
+    const colonIdx = line.indexOf(':');
+    if (colonIdx < 0) continue;
+    const key = line.slice(0, colonIdx).trim();
+    const valueRaw = line.slice(colonIdx + 1).trim();
+
+    if (key === 'temperature') {
+      const n = Number(valueRaw);
+      if (Number.isFinite(n)) data.temperature = n;
+      else errors.push(`temperature must be a number (got "${valueRaw}")`);
+    } else if (key === 'tools') {
+      if (valueRaw === '') {
+        data.tools = [];
+        arrayKey = 'tools';
+      } else if (valueRaw.startsWith('[') && valueRaw.endsWith(']')) {
+        const inner = valueRaw.slice(1, -1);
+        data.tools = inner
+          .split(',')
+          .map((s) => stripQuotes(s.trim()))
+          .filter((s) => s.length > 0);
+      } else {
+        // Loose form: "tools: a, b, c"
+        data.tools = valueRaw
+          .split(',')
+          .map((s) => stripQuotes(s.trim()))
+          .filter((s) => s.length > 0);
+      }
+    } else if (key === 'description') {
+      data.description = stripQuotes(valueRaw);
+    } else if (key === 'model') {
+      data.model = stripQuotes(valueRaw);
+    } else if (key === 'max_tool_calls') {
+      // v1.8.2: 1..100 inclusive integer. Out-of-range values are skipped
+      // with a warning rather than throwing — agents shouldn't be unusable
+      // because of a typo on a defaulted field. Non-numeric or non-integer
+      // still hard-fails the block, matching `temperature` behavior.
+      const n = Number(valueRaw);
+      if (Number.isInteger(n) && n >= 1 && n <= 100) {
+        data.max_tool_calls = n;
+      } else if (Number.isInteger(n)) {
+        console.warn(
+          `agents: max_tool_calls ${n} out of range 1-100, ignoring (falling back to default)`,
+        );
+      } else {
+        errors.push(`max_tool_calls must be an integer 1-100 (got "${valueRaw}")`);
+      }
+    }
+    // Unknown keys silently ignored — forward-compat.
+  }
+
+  return { data, errors };
+}
+
+interface RawSection {
+  name: string;
+  body: string;
+}
+
+function splitSections(content: string): RawSection[] {
+  // Split by lines matching exactly "## <name>". Level-3+ headings are body content.
+  const sections: RawSection[] = [];
+  let currentName: string | null = null;
+  let currentLines: string[] = [];
+
+  for (const line of content.split('\n')) {
+    const h2 = /^##\s+(.+?)\s*$/.exec(line);
+    const h3 = line.startsWith('### ');
+    if (h2 && !h3) {
+      if (currentName !== null) {
+        sections.push({ name: currentName, body: currentLines.join('\n') });
+      }
+      currentName = h2[1]!.trim();
+      currentLines = [];
+      continue;
+    }
+    if (currentName !== null) {
+      currentLines.push(line);
+    }
+  }
+  if (currentName !== null) {
+    sections.push({ name: currentName, body: currentLines.join('\n') });
+  }
+  return sections;
+}
+
+// Throws on malformed section — caller handles per-block error collection.
+function parseAgentSection(section: RawSection): Omit<Agent, 'source'> {
+  const lines = section.body.split('\n');
+
+  // Opening "---" fence must be the first non-empty line.
+  let openIdx = -1;
+  for (let i = 0; i < lines.length; i++) {
+    const t = lines[i]!.trim();
+    if (t === '') continue;
+    if (t === '---') {
+      openIdx = i;
+    }
+    break;
+  }
+  if (openIdx < 0) {
+    throw new Error('missing opening --- fence after heading');
+  }
+  let closeIdx = -1;
+  for (let i = openIdx + 1; i < lines.length; i++) {
+    if (lines[i]!.trim() === '---') {
+      closeIdx = i;
+      break;
+    }
+  }
+  if (closeIdx < 0) {
+    throw new Error('missing closing --- fence');
+  }
+  const yamlText = lines.slice(openIdx + 1, closeIdx).join('\n');
+  const systemPrompt = lines.slice(closeIdx + 1).join('\n').trim();
+
+  const { data: fm, errors: fmErrors } = parseFrontmatter(yamlText);
+  if (fmErrors.length > 0) {
+    throw new Error(fmErrors.join('; '));
+  }
+
+  const filteredTools = Array.isArray(fm.tools)
+    ? fm.tools.filter((t): t is string =>
+        (ALL_TOOL_NAMES as readonly string[]).includes(t),
+      )
+    : DEFAULT_TOOLS;
+
+  return {
+    id: slugify(section.name),
+    name: section.name,
+    description: fm.description ?? '',
+    system_prompt: systemPrompt,
+    temperature: typeof fm.temperature === 'number' ? fm.temperature : DEFAULT_TEMPERATURE,
+    tools: filteredTools,
+    model: typeof fm.model === 'string' && fm.model.length > 0 ? fm.model : null,
+    max_tool_calls: typeof fm.max_tool_calls === 'number' ? fm.max_tool_calls : null,
+  };
+}
+
+interface ParseResult {
+  agents: Omit<Agent, 'source'>[];
+  errors: AgentParseError[];
+}
+
+// v1.8.1: parse each `## Name` block independently. A failure in one block
+// does not abort the rest of the file — we collect a per-agent error and
+// keep parsing. Server logs a console.warn for each skipped agent.
+export function parseAgentsMd(content: string): ParseResult {
+  const sections = splitSections(content);
+  const agents: Omit<Agent, 'source'>[] = [];
+  const errors: AgentParseError[] = [];
+
+  for (const section of sections) {
+    try {
+      agents.push(parseAgentSection(section));
+    } catch (err) {
+      const reason = err instanceof Error ? err.message : String(err);
+      console.warn(`agents: skipped "${section.name}" — ${reason}`);
+      errors.push({ agent_name: section.name, reason });
+    }
+  }
+
+  return { agents, errors };
+}
+
+// ---- mtime-keyed cache + public API ----------------------------------------
+
+interface CacheEntry {
+  globalMtime: number | null;
+  projectMtime: number | null;
+  cachedAt: number;
+  result: AgentsResponse;
+}
+
+// Keyed by projectPath ('' is fine — no project case, e.g. tests). Two files
+// participate in the cache key (global + project); editing either bumps the
+// corresponding mtime so the next read sees a miss without a watcher.
+const cache = new Map<string, CacheEntry>();
+
+export function invalidateAgentsCache(projectPath?: string): void {
+  if (projectPath === undefined) {
+    cache.clear();
+  } else {
+    cache.delete(projectPath);
+  }
+}
+
+async function safeStat(path: string): Promise<number | null> {
+  try {
+    const s = await fs.stat(path);
+    return s.mtimeMs;
+  } catch {
+    return null;
+  }
+}
+
+async function safeRead(path: string): Promise<string | null> {
+  try {
+    return await fs.readFile(path, 'utf8');
+  } catch {
+    return null;
+  }
+}
+
+export async function getAgentsForProject(projectPath: string): Promise<AgentsResponse> {
+  const projectAgentsPath = projectPath ? join(projectPath, 'AGENTS.md') : null;
+
+  const [globalMtime, projectMtime] = await Promise.all([
+    safeStat(GLOBAL_AGENTS_PATH),
+    projectAgentsPath ? safeStat(projectAgentsPath) : Promise.resolve(null),
+  ]);
+
+  const cacheKey = projectPath || '__none__';
+  const cached = cache.get(cacheKey);
+  const now = Date.now();
+  if (
+    cached &&
+    cached.globalMtime === globalMtime &&
+    cached.projectMtime === projectMtime &&
+    now - cached.cachedAt < CACHE_TTL_MS
+  ) {
+    return cached.result;
+  }
+
+  const [globalContent, projectContent] = await Promise.all([
+    globalMtime !== null ? safeRead(GLOBAL_AGENTS_PATH) : Promise.resolve(null),
+    projectAgentsPath && projectMtime !== null ? safeRead(projectAgentsPath) : Promise.resolve(null),
+  ]);
+
+  const errors: AgentParseError[] = [];
+  const byName = new Map<string, Agent>();
+
+  if (globalContent !== null) {
+    const r = parseAgentsMd(globalContent);
+    for (const a of r.agents) byName.set(a.name, { ...a, source: 'global' });
+    errors.push(...r.errors);
+  }
+  if (projectContent !== null) {
+    const r = parseAgentsMd(projectContent);
+    for (const a of r.agents) byName.set(a.name, { ...a, source: 'project' });
+    errors.push(...r.errors);
+  }
+
+  const result: AgentsResponse = {
+    agents: Array.from(byName.values()),
+    errors,
+  };
+  cache.set(cacheKey, { globalMtime, projectMtime, cachedAt: now, result });
+  return result;
+}
+
+export async function getAgentById(
+  projectPath: string,
+  agentId: string,
+): Promise<Agent | null> {
+  const { agents } = await getAgentsForProject(projectPath);
+  return agents.find((a) => a.id === agentId) ?? null;
+}

apps/server/src/services/auto_name.ts

@@ -144,4 +144,23 @@ export async function maybeAutoNameChat(
     updated_at: updated[0]!.updated_at,
   });
   ctx.log.info({ chatId, name }, 'chat auto-named');
+
+  // Propagate to the parent session if it's still on its default name.
+  // The WHERE guard makes the check atomic — if the user has already
+  // renamed (or a prior chat already propagated), this UPDATE matches
+  // zero rows and we do nothing. First chat wins; manual renames win.
+  const renamedSession = await ctx.sql<{ id: string; name: string }[]>`
+    UPDATE sessions
+    SET name = ${name}
+    WHERE id = ${sessionId} AND name = 'New session'
+    RETURNING id, name
+  `;
+  if (renamedSession.length > 0) {
+    ctx.publishUser({
+      type: 'session_renamed',
+      session_id: sessionId,
+      name,
+    });
+    ctx.log.info({ sessionId, name }, 'session auto-named from chat');
+  }
 }

apps/server/src/services/git_meta.ts

@@ -0,0 +1,92 @@
+import { execFile } from 'node:child_process';
+import { promisify } from 'node:util';
+
+const execFileAsync = promisify(execFile);
+
+const CACHE_TTL_MS = 30_000;
+const GIT_TIMEOUT_MS = 2_000;
+// Cap stdout size so a pathological repo can't blow the buffer. Branch + status
+// porcelain + diverge counts never approach this on a real repo.
+const GIT_MAX_BUFFER = 1024 * 1024;
+
+export interface GitMeta {
+  branch: string | null;
+  is_dirty: boolean;
+  ahead: number;
+  behind: number;
+}
+
+interface CacheEntry {
+  at: number;
+  value: GitMeta | null;
+}
+
+const cache = new Map<string, CacheEntry>();
+
+// Runs a single git invocation with a hard 2s timeout. Returns null on any
+// failure (non-zero exit, timeout, git not installed) so callers can decide
+// how to degrade. Stderr is intentionally swallowed; we don't surface git's
+// error text to the model or UI.
+async function runGit(args: string[], cwd: string): Promise<string | null> {
+  try {
+    const { stdout } = await execFileAsync('git', args, {
+      cwd,
+      timeout: GIT_TIMEOUT_MS,
+      windowsHide: true,
+      maxBuffer: GIT_MAX_BUFFER,
+    });
+    return stdout.toString();
+  } catch {
+    return null;
+  }
+}
+
+export async function getGitMeta(rootPath: string): Promise<GitMeta | null> {
+  const cached = cache.get(rootPath);
+  const now = Date.now();
+  if (cached && now - cached.at < CACHE_TTL_MS) {
+    return cached.value;
+  }
+
+  // Three calls in parallel. rev-parse establishes repo + branch name;
+  // status --porcelain detects dirtiness with no false-positives from formatting;
+  // rev-list --left-right --count compares HEAD to upstream and is allowed to
+  // fail silently (returns null → ahead/behind = 0) when no upstream is set.
+  const [branchOut, statusOut, divergedOut] = await Promise.all([
+    runGit(['rev-parse', '--abbrev-ref', 'HEAD'], rootPath),
+    runGit(['status', '--porcelain'], rootPath),
+    runGit(['rev-list', '--left-right', '--count', 'HEAD...@{upstream}'], rootPath),
+  ]);
+
+  // If rev-parse fails, this isn't a git repo (or git isn't installed). Cache
+  // the null result so the next 30s of requests don't re-probe.
+  if (branchOut === null) {
+    cache.set(rootPath, { at: now, value: null });
+    return null;
+  }
+
+  const branch = branchOut.trim() || null;
+  const is_dirty = statusOut !== null && statusOut.trim().length > 0;
+
+  let ahead = 0;
+  let behind = 0;
+  if (divergedOut !== null) {
+    const match = divergedOut.trim().match(/^(\d+)\s+(\d+)/);
+    if (match) {
+      ahead = Number(match[1]);
+      behind = Number(match[2]);
+    }
+  }
+
+  const value: GitMeta = { branch, is_dirty, ahead, behind };
+  cache.set(rootPath, { at: now, value });
+  return value;
+}
+
+export function invalidateGitMetaCache(rootPath?: string): void {
+  if (rootPath) {
+    cache.delete(rootPath);
+  } else {
+    cache.clear();
+  }
+}

apps/server/src/services/inference.ts

@@ -1,16 +1,64 @@
 import type { FastifyBaseLogger } from 'fastify';
 import type { Sql } from '../db.js';
 import type { Config } from '../config.js';
-import type { Message, Project, Session, ToolCall, UserStreamFrame } from '../types/api.js';
-import { ALL_TOOLS, TOOLS_BY_NAME, toolJsonSchemas } from './tools.js';
+import type {
+  Agent,
+  ErrorReason,
+  Message,
+  MessageMetadata,
+  Project,
+  Session,
+  ToolCall,
+  UserStreamFrame,
+} from '../types/api.js';
+import {
+  ALL_TOOLS,
+  READ_ONLY_TOOL_NAMES,
+  TOOLS_BY_NAME,
+  toolJsonSchemas,
+  type ToolJsonSchema,
+} from './tools.js';
 import { PathScopeError, resolveProjectRoot } from './path_guard.js';
 import { maybeAutoNameChat } from './auto_name.js';
+import { getAgentById } from './agents.js';
 
 const BASE_SYSTEM_PROMPT = (projectPath: string) =>
   `You are BooCode Chat, a code investigation assistant. The user is working on a project located at ${projectPath}. Use the file-read tools (view_file, list_dir, grep, find_files) to investigate code when needed. Be concise. Cite file paths and line numbers when discussing code. Do not hallucinate file contents — read the file first. Tool results may be truncated; if so, narrow your query rather than guessing.`;
 
 const DB_FLUSH_INTERVAL_MS = 500;
-const MAX_TOOL_LOOP_DEPTH = 5;
+
+// v1.8.2: tool-call budget defaults. Resolved per-turn by resolveToolBudget.
+//   - Agent with explicit max_tool_calls: that value.
+//   - Agent with read-only-only tools:    BUDGET_READ_ONLY (30).
+//   - Agent with any non-read-only tool:  BUDGET_NON_READ_ONLY (10).
+//   - No agent (raw chat):                BUDGET_NO_AGENT (15).
+const BUDGET_READ_ONLY = 30;
+const BUDGET_NON_READ_ONLY = 10;
+const BUDGET_NO_AGENT = 15;
+
+const READ_ONLY_SET: ReadonlySet<string> = new Set(READ_ONLY_TOOL_NAMES);
+
+function resolveToolBudget(agent: Agent | null): number {
+  if (agent?.max_tool_calls != null) return agent.max_tool_calls;
+  if (!agent) return BUDGET_NO_AGENT;
+  const allReadOnly = agent.tools.every((t) => READ_ONLY_SET.has(t));
+  return allReadOnly ? BUDGET_READ_ONLY : BUDGET_NON_READ_ONLY;
+}
+
+// Synthetic system note appended to the cap-hit summary call. Verbatim from
+// the v1.8.2 spec — do not paraphrase: the model is more reliable when the
+// instruction is short, declarative, and identical across calls.
+const CAP_HIT_SUMMARY_NOTE = (limit: number) =>
+  `You've reached the tool budget (${limit} calls). Produce the best answer you can with what you have. Do not call more tools.`;
+
+function isCapHitSentinel(m: Message): boolean {
+  return (
+    m.role === 'system' &&
+    m.metadata !== null &&
+    typeof m.metadata === 'object' &&
+    (m.metadata as { kind?: unknown }).kind === 'cap_hit'
+  );
+}
 
 export interface InferenceFrame {
   type:
@@ -28,12 +76,22 @@ export interface InferenceFrame {
   chat_id?: string;
   tool_message_id?: string;
   tool_call_id?: string;
-  role?: 'assistant' | 'tool' | 'user';
+  // v1.8.2: 'system' added so cap-hit sentinel messages can announce themselves
+  // through the normal message_started → delta → message_complete sequence.
+  role?: 'assistant' | 'tool' | 'user' | 'system';
   content?: string;
   tool_call?: ToolCall;
   output?: unknown;
   truncated?: boolean;
   error?: string;
+  // v1.8.2: structured error reason. Set on `type: 'error'` so the UI can
+  // surface a specific message; `error` stays the human-readable text.
+  reason?: ErrorReason;
+  // v1.8.2: piggybacks on `message_complete` so static or terminally-resolved
+  // messages can carry their persisted metadata to the live stream without a
+  // refetch (sentinels carry { kind: 'cap_hit', ... }; failed messages carry
+  // { kind: 'error', ... }).
+  metadata?: MessageMetadata | null;
   tokens_used?: number | null;
   ctx_used?: number | null;
   ctx_max?: number | null;
@@ -91,16 +149,32 @@ export interface InferenceContext {
   publishUser: (frame: UserStreamFrame) => void;
 }
 
+// Resolution order: base prompt < agent.system_prompt < session.system_prompt.
+// Agent prompts layer on top of the base; session prompt is the most specific
+// override and stacks last so callers can append per-session instructions.
+export function buildSystemPrompt(
+  project: Project,
+  session: Session,
+  agent: Agent | null
+): string {
+  let out = BASE_SYSTEM_PROMPT(project.path);
+  if (agent && agent.system_prompt.trim().length > 0) {
+    out += '\n\n' + agent.system_prompt.trim();
+  }
+  if (session.system_prompt && session.system_prompt.trim().length > 0) {
+    out += '\n\n' + session.system_prompt.trim();
+  }
+  return out;
+}
+
 export function buildMessagesPayload(
   session: Session,
   project: Project,
-  history: Message[]
+  history: Message[],
+  agent: Agent | null = null
 ): OpenAiMessage[] {
   const out: OpenAiMessage[] = [];
-  let systemPrompt = BASE_SYSTEM_PROMPT(project.path);
-  if (session.system_prompt && session.system_prompt.trim().length > 0) {
-    systemPrompt += '\n\n' + session.system_prompt.trim();
-  }
+  const systemPrompt = buildSystemPrompt(project, session, agent);
   out.push({ role: 'system', content: systemPrompt });
 
   // Find the latest compact marker — only send messages from that point onwards
@@ -118,6 +192,11 @@ export function buildMessagesPayload(
       out.push({ role: 'system', content: m.content });
       continue;
     }
+    // v1.8.2: cap-hit sentinels are UI-only — never send them to the LLM. The
+    // synthetic "you've reached the tool budget" note lives only inside the
+    // summary call's messages array and is never persisted, so on Continue
+    // the model resumes with a clean context.
+    if (isCapHitSentinel(m)) continue;
     if (m.role === 'assistant' && m.status === 'streaming') continue;
     if (m.role === 'assistant' && m.status === 'cancelled') continue;
     if (m.role === 'tool') {
@@ -161,7 +240,7 @@ async function loadContext(
   chatId: string
 ): 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
+    SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
     FROM sessions WHERE id = ${sessionId}
   `;
   if (sessionRows.length === 0) return null;
@@ -176,7 +255,7 @@ async function loadContext(
 
   const history = await sql<Message[]>`
     SELECT id, session_id, chat_id, role, content, kind, tool_calls, tool_results, status, last_seq,
-           tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at
+           tokens_used, ctx_used, ctx_max, started_at, finished_at, created_at, metadata
     FROM messages
     WHERE chat_id = ${chatId}
     ORDER BY created_at ASC, id ASC
@@ -217,11 +296,18 @@ interface StreamResult {
   nCtx: number | null;
 }
 
+interface StreamOptions {
+  // null = omit tools entirely (compact phase); [] = caller stripped all tools
+  // (rare; we still omit from the request body to avoid OpenAI 400).
+  tools: ToolJsonSchema[] | null;
+  temperature?: number;
+}
+
 async function streamCompletion(
   ctx: InferenceContext,
   model: string,
   messages: OpenAiMessage[],
-  includeTools: boolean,
+  opts: StreamOptions,
   onDelta: (content: string) => void,
   signal?: AbortSignal
 ): Promise<StreamResult> {
@@ -231,10 +317,13 @@ async function streamCompletion(
     stream: true,
     stream_options: { include_usage: true },
   };
-  if (includeTools) {
-    body['tools'] = toolJsonSchemas();
+  if (opts.tools && opts.tools.length > 0) {
+    body['tools'] = opts.tools;
     body['tool_choice'] = 'auto';
   }
+  if (typeof opts.temperature === 'number') {
+    body['temperature'] = opts.temperature;
+  }
 
   const res = await fetch(`${ctx.config.LLAMA_SWAP_URL}/v1/chat/completions`, {
     method: 'POST',
@@ -352,7 +441,10 @@ interface TurnArgs {
   sessionId: string;
   chatId: string;
   assistantMessageId: string;
-  depth: number;
+  // v1.8.2: cumulative tool calls executed this run. Compared against the
+  // resolved budget at the top of each turn. Replaces the older `depth`
+  // counter (which counted iterations, not invocations).
+  toolsUsed: number;
   signal: AbortSignal | undefined;
 }
 
@@ -366,7 +458,8 @@ async function executeStreamPhase(
   args: TurnArgs,
   session: Session,
   messages: OpenAiMessage[],
-  state: StreamPhaseState
+  state: StreamPhaseState,
+  agent: Agent | null
 ): Promise<StreamResult> {
   const { sessionId, chatId, assistantMessageId, signal } = args;
 
@@ -407,12 +500,20 @@ async function executeStreamPhase(
     }, DB_FLUSH_INTERVAL_MS);
   };
 
+  // Tool whitelist: if an agent is set, filter the global tool list to only the
+  // tool names it allows. Unknown names in agent.tools are dropped silently
+  // (handled here by intersection). When no agent: send all tools.
+  const effectiveTools: ToolJsonSchema[] = agent
+    ? toolJsonSchemas().filter((t) => agent.tools.includes(t.function.name))
+    : toolJsonSchemas();
+  const effectiveTemperature = agent?.temperature;
+
   try {
     return await streamCompletion(
       ctx,
       session.model,
       messages,
-      true,
+      { tools: effectiveTools, temperature: effectiveTemperature },
       (delta) => {
         state.accumulated += delta;
         ctx.publish(sessionId, {
@@ -444,20 +545,43 @@ async function handleAbortOrError(
   const { sessionId, chatId, assistantMessageId } = args;
   const isAbort = err instanceof Error && err.name === 'AbortError';
   const finalStatus = isAbort ? 'cancelled' : 'failed';
-  await ctx.sql`
-    UPDATE messages
-    SET status = ${finalStatus},
-        content = ${accumulated},
-        finished_at = clock_timestamp()
-    WHERE id = ${assistantMessageId}
-  `;
+  const errMsg = err instanceof Error ? err.message : String(err);
+  // v1.8.2: persist a structured error metadata blob on genuine failures so
+  // the bubble can render the reason on reload without re-deriving from the
+  // (one-shot) WS error frame. User-initiated abort skips this — there's no
+  // "reason" to surface for a stop the user already explicitly chose.
+  const errorMetadata: MessageMetadata | null = isAbort
+    ? null
+    : { kind: 'error', error_reason: 'llm_provider_error', error_text: errMsg };
+  if (errorMetadata) {
+    await ctx.sql`
+      UPDATE messages
+      SET status = ${finalStatus},
+          content = ${accumulated},
+          finished_at = clock_timestamp(),
+          metadata = ${ctx.sql.json(errorMetadata as never)}
+      WHERE id = ${assistantMessageId}
+    `;
+  } else {
+    await ctx.sql`
+      UPDATE messages
+      SET status = ${finalStatus},
+          content = ${accumulated},
+          finished_at = clock_timestamp()
+      WHERE id = ${assistantMessageId}
+    `;
+  }
   const [failSessRow] = await ctx.sql<{ project_id: string; name: string; updated_at: string }[]>`
     UPDATE sessions SET updated_at = clock_timestamp()
     WHERE id = ${sessionId}
     RETURNING project_id, name, updated_at
   `;
   ctx.publishUser({ type: 'session_updated', session_id: sessionId, project_id: failSessRow!.project_id, name: failSessRow!.name, updated_at: failSessRow!.updated_at });
+  // v1.8 mobile-tabs: cancellation is a user-initiated stop, treat as idle;
+  // genuine errors flip the dot red. v1.8.2: error path also carries a
+  // machine-readable `reason` so the UI can render specifics inline.
   if (isAbort) {
+    ctx.publishUser({ type: 'chat_status', chat_id: chatId, status: 'idle', at: new Date().toISOString() });
     ctx.publish(sessionId, {
       type: 'message_complete',
       message_id: assistantMessageId,
@@ -465,12 +589,19 @@ async function handleAbortOrError(
     });
     ctx.log.info({ sessionId, chatId, assistantMessageId }, 'inference cancelled');
   } else {
-    const errMsg = err instanceof Error ? err.message : String(err);
+    ctx.publishUser({
+      type: 'chat_status',
+      chat_id: chatId,
+      status: 'error',
+      at: new Date().toISOString(),
+      reason: 'llm_provider_error',
+    });
     ctx.publish(sessionId, {
       type: 'error',
       message_id: assistantMessageId,
       chat_id: chatId,
       error: errMsg,
+      reason: 'llm_provider_error',
     });
     ctx.log.error({ err, sessionId, assistantMessageId }, 'inference failed');
   }
@@ -484,7 +615,7 @@ async function executeToolPhase(
   session: Session,
   projectRoot: string
 ): Promise<void> {
-  const { sessionId, chatId, assistantMessageId, depth, signal } = args;
+  const { sessionId, chatId, assistantMessageId, toolsUsed, signal } = args;
   const { content, toolCalls, promptTokens, completionTokens, nCtx } = result;
 
   const [updated] = await ctx.sql<
@@ -568,7 +699,10 @@ async function executeToolPhase(
     sessionId,
     chatId,
     assistantMessageId: nextAssistant!.id,
-    depth: depth + 1,
+    // v1.8.2: charge this turn's actual tool invocations against the budget.
+    // One assistant message can emit multiple tool_calls, so we add the run
+    // count, not 1. The next turn's budget check sees the cumulative total.
+    toolsUsed: toolsUsed + result.toolCalls.length,
     signal,
   });
 }
@@ -602,6 +736,7 @@ async function finalizeCompletion(
     RETURNING project_id, name, updated_at
   `;
   ctx.publishUser({ type: 'session_updated', session_id: sessionId, project_id: completeSessRow!.project_id, name: completeSessRow!.name, updated_at: completeSessRow!.updated_at });
+  ctx.publishUser({ type: 'chat_status', chat_id: chatId, status: 'idle', at: new Date().toISOString() });
   ctx.publish(sessionId, {
     type: 'message_complete',
     message_id: assistantMessageId,
@@ -631,24 +766,7 @@ async function runAssistantTurn(
   ctx: InferenceContext,
   args: TurnArgs,
 ): Promise<void> {
-  const { sessionId, chatId, assistantMessageId, depth } = args;
-
-  if (depth > MAX_TOOL_LOOP_DEPTH) {
-    await ctx.sql`
-      UPDATE messages
-      SET status = 'failed',
-          content = ${'tool loop depth exceeded'},
-          finished_at = clock_timestamp()
-      WHERE id = ${assistantMessageId}
-    `;
-    ctx.publish(sessionId, {
-      type: 'error',
-      message_id: assistantMessageId,
-      chat_id: chatId,
-      error: 'tool loop depth exceeded',
-    });
-    return;
-  }
+  const { sessionId, chatId } = args;
 
   const loaded = await loadContext(ctx.sql, sessionId, chatId);
   if (!loaded) {
@@ -657,12 +775,29 @@ async function runAssistantTurn(
   }
   const { session, project, history } = loaded;
   const projectRoot = await resolveProjectRoot(project.path);
-  const messages = buildMessagesPayload(session, project, history);
+  // Agent resolution is per-turn so PATCH agent_id mid-conversation takes
+  // effect on the next message. Unknown agent_id returns null silently —
+  // session falls back to base prompt + all tools + default temperature.
+  const agent = session.agent_id
+    ? await getAgentById(project.path, session.agent_id)
+    : null;
+
+  // v1.8.2: cap-hit replaces the older "tool loop depth exceeded" failure.
+  // When we've already burned the budget *before* this turn even runs, we
+  // skip straight to the summary flow — the in-flight assistant message slot
+  // gets reused for the wrap-up reply instead of being marked failed.
+  const budget = resolveToolBudget(agent);
+  if (args.toolsUsed >= budget) {
+    await runCapHitSummary(ctx, args, session, project, history, agent, budget);
+    return;
+  }
+
+  const messages = buildMessagesPayload(session, project, history, agent);
 
   const state: StreamPhaseState = { accumulated: '', startedAt: null };
   let result: StreamResult;
   try {
-    result = await executeStreamPhase(ctx, args, session, messages, state);
+    result = await executeStreamPhase(ctx, args, session, messages, state, agent);
   } catch (err) {
     await handleAbortOrError(ctx, args, state.accumulated, err);
     return;
@@ -683,7 +818,264 @@ export async function runInference(
   assistantMessageId: string,
   signal?: AbortSignal
 ): Promise<void> {
-  return runAssistantTurn(ctx, { sessionId, chatId, assistantMessageId, depth: 0, signal });
+  // v1.8.2: every fresh inference (initial send, regenerate, force_send,
+  // continue) starts with a clean budget. Tool-call accumulation across
+  // Continue invocations is what the hard ceiling guards against, not the
+  // per-call budget.
+  return runAssistantTurn(ctx, { sessionId, chatId, assistantMessageId, toolsUsed: 0, signal });
+}
+
+// v1.8.2: cap-hit summary flow. Called instead of erroring when the loop
+// hits its budget. Reuses the in-flight assistant message slot to stream a
+// short wrap-up reply with the synthetic note prepended and tools disabled,
+// then always inserts a cap_hit sentinel afterward (regardless of summary
+// outcome) so the UI can show a Continue affordance.
+async function runCapHitSummary(
+  ctx: InferenceContext,
+  args: TurnArgs,
+  session: Session,
+  project: Project,
+  history: Message[],
+  agent: Agent | null,
+  budget: number,
+): Promise<void> {
+  const { sessionId, chatId, assistantMessageId, signal } = args;
+
+  const messages = buildMessagesPayload(session, project, history, agent);
+  messages.push({ role: 'system', content: CAP_HIT_SUMMARY_NOTE(budget) });
+
+  const startedRow = await ctx.sql<{ started_at: string }[]>`
+    UPDATE messages
+    SET started_at = clock_timestamp()
+    WHERE id = ${assistantMessageId}
+    RETURNING started_at
+  `;
+  const startedAt = startedRow[0]?.started_at ?? null;
+
+  ctx.publish(sessionId, {
+    type: 'message_started',
+    message_id: assistantMessageId,
+    chat_id: chatId,
+    role: 'assistant',
+  });
+
+  let accumulated = '';
+  let pendingFlushTimer: NodeJS.Timeout | null = null;
+  let flushPromise: Promise<unknown> = Promise.resolve();
+  const flushNow = () => {
+    if (pendingFlushTimer) {
+      clearTimeout(pendingFlushTimer);
+      pendingFlushTimer = null;
+    }
+    const snapshot = accumulated;
+    flushPromise = flushPromise.then(() =>
+      ctx.sql`UPDATE messages SET content = ${snapshot} WHERE id = ${assistantMessageId}`
+    );
+  };
+  const scheduleFlush = () => {
+    if (pendingFlushTimer) return;
+    pendingFlushTimer = setTimeout(() => {
+      pendingFlushTimer = null;
+      flushNow();
+    }, DB_FLUSH_INTERVAL_MS);
+  };
+
+  let summaryOk = false;
+  let summarySoftCancelled = false;
+  let summaryError: string | null = null;
+  let result: StreamResult | null = null;
+  try {
+    result = await streamCompletion(
+      ctx,
+      session.model,
+      messages,
+      { tools: null, temperature: agent?.temperature },
+      (delta) => {
+        accumulated += delta;
+        ctx.publish(sessionId, {
+          type: 'delta',
+          message_id: assistantMessageId,
+          chat_id: chatId,
+          content: delta,
+        });
+        scheduleFlush();
+      },
+      signal,
+    );
+    summaryOk = true;
+  } catch (err) {
+    if (err instanceof Error && err.name === 'AbortError') {
+      summarySoftCancelled = true;
+    } else {
+      summaryError = err instanceof Error ? err.message : String(err);
+    }
+  } finally {
+    if (pendingFlushTimer) {
+      clearTimeout(pendingFlushTimer);
+      pendingFlushTimer = null;
+    }
+    await flushPromise;
+  }
+
+  // Finalize the summary message based on the three outcomes. The sentinel
+  // is inserted regardless so the user always has the Continue affordance —
+  // even on a partial / failed summary the chat history shows where the
+  // budget was hit.
+  if (summaryOk && result) {
+    const [updated] = await ctx.sql<
+      { tokens_used: number | null; ctx_used: number | null; ctx_max: number | null; finished_at: string | null }[]
+    >`
+      UPDATE messages
+      SET content = ${result.content},
+          status = 'complete',
+          tokens_used = ${result.completionTokens},
+          ctx_used = ${result.promptTokens},
+          ctx_max = ${result.nCtx},
+          finished_at = clock_timestamp()
+      WHERE id = ${assistantMessageId}
+      RETURNING tokens_used, ctx_used, ctx_max, finished_at
+    `;
+    ctx.publish(sessionId, {
+      type: 'message_complete',
+      message_id: assistantMessageId,
+      chat_id: chatId,
+      tokens_used: updated?.tokens_used ?? null,
+      ctx_used: updated?.ctx_used ?? null,
+      ctx_max: updated?.ctx_max ?? null,
+      started_at: startedAt,
+      finished_at: updated?.finished_at ?? null,
+      model: session.model,
+    });
+  } else if (summarySoftCancelled) {
+    await ctx.sql`
+      UPDATE messages
+      SET content = ${accumulated},
+          status = 'cancelled',
+          finished_at = clock_timestamp()
+      WHERE id = ${assistantMessageId}
+    `;
+    ctx.publish(sessionId, {
+      type: 'message_complete',
+      message_id: assistantMessageId,
+      chat_id: chatId,
+    });
+  } else {
+    const errMeta: MessageMetadata = {
+      kind: 'error',
+      error_reason: 'summary_after_cap_failed',
+      error_text: summaryError ?? 'summary failed',
+    };
+    await ctx.sql`
+      UPDATE messages
+      SET content = ${accumulated},
+          status = 'failed',
+          finished_at = clock_timestamp(),
+          metadata = ${ctx.sql.json(errMeta as never)}
+      WHERE id = ${assistantMessageId}
+    `;
+    ctx.publish(sessionId, {
+      type: 'error',
+      message_id: assistantMessageId,
+      chat_id: chatId,
+      error: summaryError ?? 'summary failed',
+      reason: 'summary_after_cap_failed',
+    });
+  }
+
+  // Bump session/chat updated_at exactly once for this turn.
+  const [sessRow] = await ctx.sql<{ project_id: string; name: string; updated_at: string }[]>`
+    UPDATE sessions SET updated_at = clock_timestamp()
+    WHERE id = ${sessionId}
+    RETURNING project_id, name, updated_at
+  `;
+  ctx.publishUser({
+    type: 'session_updated',
+    session_id: sessionId,
+    project_id: sessRow!.project_id,
+    name: sessRow!.name,
+    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) {
+    ctx.publishUser({ type: 'chat_status', chat_id: chatId, status: 'idle', at: new Date().toISOString() });
+  } else if (summarySoftCancelled) {
+    ctx.publishUser({ type: 'chat_status', chat_id: chatId, status: 'idle', at: new Date().toISOString() });
+  } else {
+    ctx.publishUser({
+      type: 'chat_status',
+      chat_id: chatId,
+      status: 'error',
+      at: new Date().toISOString(),
+      reason: 'summary_after_cap_failed',
+    });
+  }
+
+  ctx.log.info(
+    { sessionId, chatId, assistantMessageId, budget, summaryOk, summaryCancelled: summarySoftCancelled },
+    'inference cap-hit summary finished',
+  );
+}
+
+async function insertCapHitSentinel(
+  ctx: InferenceContext,
+  sessionId: string,
+  chatId: string,
+  agent: Agent | null,
+  budget: number,
+): Promise<void> {
+  // Hard ceiling: count prior cap_hit sentinels in this chat. After two
+  // continues (sentinel count of 2), the next sentinel reports can_continue
+  // false and the UI disables the Continue button.
+  const priorRows = await ctx.sql<{ count: number }[]>`
+    SELECT COUNT(*)::int AS count
+    FROM messages
+    WHERE chat_id = ${chatId}
+      AND role = 'system'
+      AND metadata->>'kind' = 'cap_hit'
+  `;
+  const priorCount = priorRows[0]?.count ?? 0;
+  const canContinue = priorCount < 2;
+  const metadata: MessageMetadata = {
+    kind: 'cap_hit',
+    used: budget,
+    limit: budget,
+    agent_name: agent?.name ?? null,
+    can_continue: canContinue,
+  };
+  const content = `Reached tool budget (${budget}/${budget}). Continue to extend.`;
+
+  const [row] = await ctx.sql<{ id: string }[]>`
+    INSERT INTO messages (session_id, chat_id, role, content, status, created_at, metadata)
+    VALUES (${sessionId}, ${chatId}, 'system', ${content}, 'complete', clock_timestamp(), ${ctx.sql.json(metadata as never)})
+    RETURNING id
+  `;
+
+  // The sentinel content is static, but we still walk the standard frame
+  // sequence (started → delta → complete) so useSessionStream's reducer
+  // appends it via the same path it uses for streaming assistant messages.
+  // The delta carries the full text in one chunk.
+  ctx.publish(sessionId, {
+    type: 'message_started',
+    message_id: row!.id,
+    chat_id: chatId,
+    role: 'system',
+  });
+  ctx.publish(sessionId, {
+    type: 'delta',
+    message_id: row!.id,
+    chat_id: chatId,
+    content,
+  });
+  ctx.publish(sessionId, {
+    type: 'message_complete',
+    message_id: row!.id,
+    chat_id: chatId,
+    metadata,
+  });
 }
 
 const COMPACT_SYSTEM_PROMPT =
@@ -720,7 +1112,7 @@ async function runCompact(
       ctx,
       session.model,
       messagesForSummary,
-      false,
+      { tools: null },
       (delta) => {
         content += delta;
         ctx.publish(sessionId, {
@@ -778,6 +1170,9 @@ export function createInferenceRunner(
         ...ctx,
         publishUser: (frame) => publishUserFn(user, frame),
       };
+      // v1.8 mobile-tabs: announce working before the async loop starts so
+      // every device subscribed to the user channel sees the amber dot.
+      callCtx.publishUser({ type: 'chat_status', chat_id: chatId, status: 'working', at: new Date().toISOString() });
       const controller = new AbortController();
       let resolveCompleted!: () => void;
       const completed = new Promise<void>((res) => { resolveCompleted = res; });

apps/server/src/services/tools.ts

@@ -3,6 +3,7 @@ import { resolve, basename, relative } from 'node:path';
 import { z } from 'zod';
 import { pathGuard, PathScopeError } from './path_guard.js';
 import { grep as fileOpsGrep, findFiles as fileOpsFindFiles } from './file_ops.js';
+import { getGitMeta } from './git_meta.js';
 
 const MAX_FILE_BYTES = 5 * 1024 * 1024;
 const DEFAULT_VIEW_LINES = 200;
@@ -266,13 +267,60 @@ export const findFiles: ToolDef<FindFilesInputT> = {
   },
 };
 
+// v1.8 Level 1 branch awareness: gives the model a read-only view of the
+// project's git state. No path input — operates on the inference-resolved
+// project root via getGitMeta. Subprocess runs with a 2s timeout (see git_meta).
+const GitStatusInput = z.object({}).strict();
+type GitStatusInputT = z.infer<typeof GitStatusInput>;
+
+export const gitStatus: ToolDef<GitStatusInputT> = {
+  name: 'git_status',
+  description:
+    "Returns the current git branch, whether the working tree is dirty, and ahead/behind counts vs upstream. Read-only. Use when you need to know which branch the user is currently working on.",
+  inputSchema: GitStatusInput,
+  jsonSchema: {
+    type: 'function',
+    function: {
+      name: 'git_status',
+      description:
+        'Returns the current git branch, dirty flag, and ahead/behind counts vs upstream. Read-only.',
+      parameters: {
+        type: 'object',
+        properties: {},
+        additionalProperties: false,
+      },
+    },
+  },
+  async execute(_input, projectRoot) {
+    const meta = await getGitMeta(projectRoot);
+    if (meta === null) {
+      return { repo: false, branch: null, is_dirty: false, ahead: 0, behind: 0 };
+    }
+    return { repo: true, ...meta };
+  },
+};
+
 export const ALL_TOOLS: ReadonlyArray<ToolDef<unknown>> = [
   viewFile as ToolDef<unknown>,
   listDir as ToolDef<unknown>,
   grep as ToolDef<unknown>,
   findFiles as ToolDef<unknown>,
+  gitStatus as ToolDef<unknown>,
 ];
 
+// v1.8.2: forward-compatible read-only whitelist. An agent whose `tools` is
+// fully contained in this set gets a generous default tool budget (30);
+// anything outside means the agent can mutate state and gets a tighter
+// default (10). Every tool in v1.8.2 happens to be read-only, so the
+// non-RO branch only takes effect once BooCoder lands write tools.
+export const READ_ONLY_TOOL_NAMES = [
+  'view_file',
+  'list_dir',
+  'grep',
+  'find_files',
+  'git_status',
+] as const;
+
 export const TOOLS_BY_NAME: Record<string, ToolDef<unknown>> = Object.fromEntries(
   ALL_TOOLS.map((t) => [t.name, t])
 );

apps/server/src/types/api.ts

@@ -28,6 +28,40 @@ export interface Session {
   status: SessionStatus;
   created_at: string;
   updated_at: string;
+  agent_id: string | null;
+}
+
+// v1.8.1: agents come from two sources. 'global' = /data/AGENTS.md (always
+// loaded inside the container), 'project' = per-project override at
+// <root>/AGENTS.md. Project entries override global by name (case-sensitive).
+export type AgentSource = 'global' | 'project';
+
+export interface Agent {
+  id: string;            // slug of name; stable handle stored in sessions.agent_id
+  name: string;
+  description: string;
+  system_prompt: string;
+  temperature: number;
+  tools: string[];       // whitelist of tool names; empty = no tools allowed
+  model: string | null;  // null means "session.model wins"
+  source: AgentSource;
+  // v1.8.2: per-agent tool-loop budget. null means resolve at runtime from the
+  // agent's toolset (30 if all tools are read-only, 10 otherwise) or 15 for
+  // raw chat with no agent.
+  max_tool_calls: number | null;
+}
+
+// One entry per malformed `## Name` block. Per-block errors don't fail the
+// whole file — the loader returns parsed-successfully agents AND the list of
+// skipped ones so the UI can show a non-blocking warning chip.
+export interface AgentParseError {
+  agent_name: string;
+  reason: string;
+}
+
+export interface AgentsResponse {
+  agents: Agent[];
+  errors: AgentParseError[];
 }
 
 // KEEP IN SYNC: apps/server/src/schema.sql chats_status_chk
@@ -70,6 +104,31 @@ export interface ToolResult {
   error?: string;
 }
 
+// v1.8.2: structured reason codes for failed inferences. `error` carries the
+// human text; `reason` is the machine-readable discriminator the UI matches
+// on (with `error` as fallback when reason is absent or unrecognized).
+export type ErrorReason =
+  | 'llm_provider_error'
+  | 'tool_execution_failed'
+  | 'summary_after_cap_failed';
+
+// v1.8.2: shapes stored in messages.metadata. Discriminated on `kind`.
+//   cap_hit  — system sentinel emitted when tool budget is exhausted
+//   error    — attached to a failed assistant message so UI can show reason
+export type MessageMetadata =
+  | {
+      kind: 'cap_hit';
+      used: number;
+      limit: number;
+      agent_name: string | null;
+      can_continue: boolean;
+    }
+  | {
+      kind: 'error';
+      error_reason: ErrorReason;
+      error_text: string;
+    };
+
 export interface Message {
   id: string;
   session_id: string;
@@ -87,6 +146,9 @@ export interface Message {
   started_at: string | null;
   finished_at: string | null;
   created_at: string;
+  // v1.8.2: per-message metadata. See MessageMetadata for the discriminated
+  // shapes currently in use.
+  metadata: MessageMetadata | null;
 }
 
 export interface ModelInfo {
@@ -225,6 +287,17 @@ export interface ProjectUpdatedFrame {
   project_id: string;
   name: string;
 }
+// v1.8 mobile-tabs: server can't know about client-side panes, so status
+// is keyed by chat_id. Frontend dot derives pane status from pane.activeChatId.
+// v1.8.2: optional `reason` carries a machine-readable code when status is
+// 'error'. UI prefers reason; falls back to no detail when absent.
+export interface ChatStatusFrame {
+  type: 'chat_status';
+  chat_id: string;
+  status: 'working' | 'idle' | 'error';
+  at: string;
+  reason?: ErrorReason;
+}
 export type UserStreamFrame =
   | ProjectCreatedFrame
   | ProjectDeletedFrame
@@ -240,4 +313,5 @@ export type UserStreamFrame =
   | ChatDeletedFrame
   | ProjectArchivedFrame
   | ProjectUnarchivedFrame
-  | ProjectUpdatedFrame;
+  | ProjectUpdatedFrame
+  | ChatStatusFrame;

apps/web/src/App.tsx

@@ -8,6 +8,9 @@ import { Project } from '@/pages/Project';
 import { Session } from '@/pages/Session';
 import { Toaster } from '@/components/ui/sonner';
 import { useUserEvents } from '@/hooks/useUserEvents';
+import { SidebarDrawerProvider, useSidebarDrawer } from '@/hooks/useSidebarDrawer';
+import { RightRailDrawerProvider, useRightRailDrawer } from '@/hooks/useRightRailDrawer';
+import { useViewport } from '@/hooks/useViewport';
 
 function SessionRightRail() {
   const { id } = useParams<{ id: string }>();
@@ -24,14 +27,45 @@ function RightRailForSession({ sessionId }: { sessionId: string }) {
       .catch((err) => console.warn('RightRail: failed to fetch session', err));
   }, [sessionId]);
   if (!projectId) return null;
+  // v1.6.2: rendered on all viewports. On mobile, RightRail itself renders as
+  // a right-side drawer toggled by the header's FolderTree button (via
+  // useRightRailDrawer). On desktop, it renders inline as before with its
+  // own internal open/close state.
   return <RightRail projectId={projectId} />;
 }
 
+function MobileBackdrop() {
+  const { open, setOpen } = useSidebarDrawer();
+  const { isMobile } = useViewport();
+  if (!isMobile || !open) return null;
+  return (
+    <div
+      className="fixed inset-0 z-30 bg-black/40 md:hidden"
+      onClick={() => setOpen(false)}
+      aria-hidden="true"
+    />
+  );
+}
+
+function MobileRightRailBackdrop() {
+  const { open, setOpen } = useRightRailDrawer();
+  const { isMobile } = useViewport();
+  if (!isMobile || !open) return null;
+  return (
+    <div
+      className="fixed inset-0 z-30 bg-black/40 md:hidden"
+      onClick={() => setOpen(false)}
+      aria-hidden="true"
+    />
+  );
+}
+
 function AppShell() {
   useUserEvents();
   return (
     <div className="dark h-screen flex bg-background text-foreground">
       <ProjectSidebar />
+      <MobileBackdrop />
       <main className="flex-1 flex flex-col min-w-0">
         <Routes>
           <Route path="/" element={<Home />} />
@@ -39,6 +73,7 @@ function AppShell() {
           <Route path="/session/:id" element={<Session />} />
         </Routes>
       </main>
+      <MobileRightRailBackdrop />
       <Routes>
         <Route path="/session/:id" element={<SessionRightRail />} />
       </Routes>
@@ -50,7 +85,11 @@ function AppShell() {
 export default function App() {
   return (
     <BrowserRouter>
-      <AppShell />
+      <SidebarDrawerProvider>
+        <RightRailDrawerProvider>
+          <AppShell />
+        </RightRailDrawerProvider>
+      </SidebarDrawerProvider>
     </BrowserRouter>
   );
 }

apps/web/src/api/client.ts

@@ -8,6 +8,8 @@ import type {
   SidebarResponse,
   ListDirResult,
   ViewFileResult,
+  AgentsResponse,
+  GitMeta,
 } from './types';
 
 export class ApiError extends Error {
@@ -86,6 +88,8 @@ export const api = {
       request<ViewFileResult>(`/api/projects/${id}/view_file?path=${encodeURIComponent(path)}`),
     files: (id: string) =>
       request<{ files: string[] }>(`/api/projects/${id}/files`),
+    git: (id: string) =>
+      request<GitMeta>(`/api/projects/${id}/git`),
   },
 
   sessions: {
@@ -93,7 +97,7 @@ export const api = {
       request<Session[]>(`/api/projects/${projectId}/sessions${status ? `?status=${status}` : ''}`),
     create: (
       projectId: string,
-      body: { name?: string; model?: string; system_prompt?: string }
+      body: { name?: string; model?: string; system_prompt?: string; agent_id?: string | null }
     ) =>
       request<Session>(`/api/projects/${projectId}/sessions`, {
         method: 'POST',
@@ -102,7 +106,7 @@ export const api = {
     get: (id: string) => request<Session>(`/api/sessions/${id}`),
     update: (
       id: string,
-      body: Partial<Pick<Session, 'name' | 'model' | 'system_prompt'>>
+      body: Partial<Pick<Session, 'name' | 'model' | 'system_prompt' | 'agent_id'>>
     ) =>
       request<Session>(`/api/sessions/${id}`, {
         method: 'PATCH',
@@ -148,6 +152,13 @@ export const api = {
         `/api/chats/${chatId}/force_send`,
         { method: 'POST', body: JSON.stringify({ content }) }
       ),
+    // v1.8.2: extend an inference that hit the tool budget. `sentinelMessageId`
+    // is the cap-hit sentinel message the user clicked Continue on.
+    continue: (chatId: string, sentinelMessageId: string) =>
+      request<{ assistant_message_id: string }>(
+        `/api/chats/${chatId}/continue`,
+        { method: 'POST', body: JSON.stringify({ sentinel_message_id: sentinelMessageId }) }
+      ),
     fork: (chatId: string, body: { messageId: string; name?: string }) =>
       request<Chat>(`/api/chats/${chatId}/fork`, {
         method: 'POST',
@@ -179,6 +190,11 @@ export const api = {
 
   models: () => request<ModelInfo[]>('/api/models'),
 
+  agents: {
+    list: (projectId: string) =>
+      request<AgentsResponse>(`/api/projects/${projectId}/agents`),
+  },
+
   settings: {
     get: () => request<Record<string, unknown>>('/api/settings'),
     patch: (body: Record<string, unknown>) =>

apps/web/src/api/types.ts

@@ -27,6 +27,37 @@ export interface Session {
   status: SessionStatus;
   created_at: string;
   updated_at: string;
+  agent_id: string | null;
+}
+
+// v1.8.1: 'global' = /data/AGENTS.md (always-on), 'project' = per-project
+// override at <root>/AGENTS.md. In-code builtins were retired; the seed file
+// lives at /data/AGENTS.md.
+export type AgentSource = 'global' | 'project';
+
+export interface Agent {
+  id: string;
+  name: string;
+  description: string;
+  system_prompt: string;
+  temperature: number;
+  tools: string[];
+  model: string | null;
+  source: AgentSource;
+  // v1.8.2: per-agent tool-loop budget. null means resolve at runtime from
+  // the agent's toolset (30 for all read-only, 10 otherwise) or 15 for raw
+  // chat with no agent.
+  max_tool_calls: number | null;
+}
+
+export interface AgentParseError {
+  agent_name: string;
+  reason: string;
+}
+
+export interface AgentsResponse {
+  agents: Agent[];
+  errors: AgentParseError[];
 }
 
 export const CHAT_STATUSES = ['open', 'archived'] as const;
@@ -62,6 +93,32 @@ export interface ToolResult {
   error?: string;
 }
 
+// v1.8.2: structured reason codes that flow through error frames / metadata.
+// `error` text stays human; `reason` is the discriminator the UI matches on.
+export type ErrorReason =
+  | 'llm_provider_error'
+  | 'tool_execution_failed'
+  | 'summary_after_cap_failed';
+
+// v1.8.2: shapes stored in Message.metadata. Discriminated on `kind`.
+//   cap_hit — sentinel emitted when the tool budget is hit; carries the
+//             budget + agent name + whether Continue is still allowed.
+//   error   — attached to a failed assistant message so the bubble can show
+//             a specific reason on reload (WS error frame is one-shot).
+export type MessageMetadata =
+  | {
+      kind: 'cap_hit';
+      used: number;
+      limit: number;
+      agent_name: string | null;
+      can_continue: boolean;
+    }
+  | {
+      kind: 'error';
+      error_reason: ErrorReason;
+      error_text: string;
+    };
+
 export interface Message {
   id: string;
   session_id: string;
@@ -79,6 +136,9 @@ export interface Message {
   started_at: string | null;
   finished_at: string | null;
   created_at: string;
+  // v1.8.2: per-message metadata; see MessageMetadata. null for the vast
+  // majority of messages.
+  metadata: MessageMetadata | null;
 }
 
 export interface ModelInfo {
@@ -156,6 +216,15 @@ export interface PaneUpdateRequest {
   position?: number;
 }
 
+// v1.8 mobile-tabs: shape returned by GET /api/projects/:id/git. Mirrors
+// services/git_meta.ts on the server. branch=null means "not a git repo".
+export interface GitMeta {
+  branch: string | null;
+  is_dirty: boolean;
+  ahead: number;
+  behind: number;
+}
+
 export type WorkspacePaneKind = 'chat' | 'terminal' | 'agent' | 'empty';
 
 export interface WorkspacePane {
@@ -189,7 +258,13 @@ export type WsFrame =
       ctx_max?: number | null;
       started_at?: string | null;
       finished_at?: string | null;
+      // v1.8.2: piggybacks the persisted metadata onto the terminal frame so
+      // cap-hit sentinels (and any future stamped-on-complete metadata) flow
+      // to the client without a refetch.
+      metadata?: MessageMetadata | null;
     }
   | { type: 'messages_deleted'; message_ids: string[]; chat_id?: string }
   | { type: 'chat_renamed'; chat_id: string; name: string }
-  | { type: 'error'; message_id?: string; chat_id?: string; error: string };
+  // v1.8.2: `reason` discriminates structured failures (the UI prefers it
+  // over `error` text when present).
+  | { type: 'error'; message_id?: string; chat_id?: string; error: string; reason?: ErrorReason };

apps/web/src/components/AgentPicker.tsx

@@ -0,0 +1,121 @@
+import { useEffect, useState } from 'react';
+import { Check, ChevronDown } from 'lucide-react';
+import { toast } from 'sonner';
+import { api } from '@/api/client';
+import type { Agent, AgentParseError } from '@/api/types';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+
+interface Props {
+  projectId: string;
+  value: string | null;
+  onChange: (agentId: string | null) => void | Promise<void>;
+}
+
+export function AgentPicker({ projectId, value, onChange }: Props) {
+  const [agents, setAgents] = useState<Agent[] | null>(null);
+  const [parseErrors, setParseErrors] = useState<AgentParseError[]>([]);
+  const [error, setError] = useState<string | null>(null);
+  const [open, setOpen] = useState(false);
+
+  // v1.8.1: per-agent parse errors are non-blocking. Silent if any agents
+  // loaded successfully; a gray warning toast fires only when EVERY agent
+  // in AGENTS.md failed to parse. Server logs a console.warn either way.
+  useEffect(() => {
+    let cancelled = false;
+    setAgents(null);
+    setParseErrors([]);
+    setError(null);
+    api.agents
+      .list(projectId)
+      .then((res) => {
+        if (cancelled) return;
+        setAgents(res.agents);
+        setParseErrors(res.errors);
+        if (res.errors.length > 0 && res.agents.length === 0) {
+          toast.warning(
+            `AGENTS.md: ${res.errors.length} agent${res.errors.length === 1 ? '' : 's'} failed to parse, none loaded`,
+          );
+        }
+      })
+      .catch((err) => {
+        if (cancelled) return;
+        setError(err instanceof Error ? err.message : 'failed to load agents');
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, [projectId]);
+
+  const selectedAgent = agents?.find((a) => a.id === value) ?? null;
+  const triggerLabel = value === null
+    ? 'No agent'
+    : selectedAgent?.name ?? value;
+
+  return (
+    <DropdownMenu open={open} onOpenChange={setOpen}>
+      <DropdownMenuTrigger asChild>
+        <button
+          type="button"
+          className="text-xs text-muted-foreground hover:text-foreground flex items-center gap-1 px-1.5 py-0.5 rounded hover:bg-muted/60"
+          title={selectedAgent?.description ?? undefined}
+        >
+          <span className="truncate max-w-[160px]">{triggerLabel}</span>
+          <ChevronDown className="size-3 opacity-70" />
+        </button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="start" className="max-h-80 overflow-y-auto w-72">
+        {error && (
+          <div className="px-2 py-1.5 text-xs text-destructive">{error}</div>
+        )}
+        {agents === null && !error && (
+          <div className="px-2 py-1.5 text-xs text-muted-foreground">Loading…</div>
+        )}
+        {agents !== null && (
+          <>
+            <DropdownMenuItem
+              onSelect={() => void onChange(null)}
+              className="text-xs"
+            >
+              <Check className={`size-3 ${value === null ? 'opacity-100' : 'opacity-0'}`} />
+              <span className="font-medium">No agent</span>
+            </DropdownMenuItem>
+            {agents.length > 0 && <DropdownMenuSeparator />}
+            {agents.map((a) => (
+              <DropdownMenuItem
+                key={a.id}
+                onSelect={() => void onChange(a.id)}
+                className="text-xs flex-col items-start gap-0.5"
+              >
+                <div className="flex items-center gap-1.5">
+                  <Check
+                    className={`size-3 ${a.id === value ? 'opacity-100' : 'opacity-0'}`}
+                  />
+                  <span className="font-medium">{a.name}</span>
+                </div>
+                {a.description && (
+                  <span className="text-muted-foreground pl-[18px] truncate w-full">
+                    {a.description}
+                  </span>
+                )}
+              </DropdownMenuItem>
+            ))}
+            {parseErrors.length > 0 && (
+              <div
+                className="px-2 py-1.5 mt-1 text-xs text-amber-500 border-t border-border"
+                title={parseErrors.map((e) => `${e.agent_name}: ${e.reason}`).join('\n')}
+              >
+                {parseErrors.length} agent{parseErrors.length === 1 ? '' : 's'} skipped
+              </div>
+            )}
+          </>
+        )}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}

apps/web/src/components/BottomSheet.tsx

@@ -0,0 +1,92 @@
+import { useEffect, useRef, useState, type ReactNode, type TouchEvent } from 'react';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  open: boolean;
+  onClose: () => void;
+  children: ReactNode;
+  title?: string;
+}
+
+// Past this drag distance, release dismisses the sheet.
+const SWIPE_DISMISS_THRESHOLD_PX = 80;
+
+export function BottomSheet({ open, onClose, children, title }: Props) {
+  const [dragY, setDragY] = useState(0);
+  const startYRef = useRef<number | null>(null);
+
+  useEffect(() => {
+    if (!open) return;
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onClose();
+    };
+    window.addEventListener('keydown', onKey);
+    return () => window.removeEventListener('keydown', onKey);
+  }, [open, onClose]);
+
+  useEffect(() => {
+    if (!open) {
+      setDragY(0);
+      startYRef.current = null;
+    }
+  }, [open]);
+
+  function onTouchStart(e: TouchEvent<HTMLDivElement>) {
+    const t = e.touches[0];
+    if (!t) return;
+    startYRef.current = t.clientY;
+  }
+  function onTouchMove(e: TouchEvent<HTMLDivElement>) {
+    const t = e.touches[0];
+    if (!t || startYRef.current === null) return;
+    const dy = t.clientY - startYRef.current;
+    // Clamp to downward drags so the sheet doesn't "rubber-band" up.
+    if (dy > 0) setDragY(dy);
+  }
+  function onTouchEnd() {
+    if (dragY > SWIPE_DISMISS_THRESHOLD_PX) {
+      onClose();
+    } else {
+      setDragY(0);
+    }
+    startYRef.current = null;
+  }
+
+  if (!open) return null;
+
+  return (
+    <>
+      <div
+        className="fixed inset-0 z-40 bg-black/40"
+        onClick={onClose}
+        aria-hidden="true"
+      />
+      <div
+        role="dialog"
+        aria-modal="true"
+        className={cn(
+          'fixed inset-x-0 bottom-0 z-50 rounded-t-2xl border-t border-border bg-popover text-popover-foreground shadow-2xl',
+          'transition-transform duration-150 will-change-transform',
+          'max-h-[70vh] flex flex-col',
+        )}
+        style={{
+          transform: `translateY(${dragY}px)`,
+          paddingBottom: 'env(safe-area-inset-bottom)',
+        }}
+      >
+        <div
+          onTouchStart={onTouchStart}
+          onTouchMove={onTouchMove}
+          onTouchEnd={onTouchEnd}
+          className="flex flex-col items-center pt-2 pb-1 select-none touch-none"
+        >
+          <div className="w-10 h-1 bg-muted-foreground/40 rounded-full" />
+          {title && (
+            <div className="mt-1 text-sm font-medium text-muted-foreground">{title}</div>
+          )}
+        </div>
+        <div className="flex-1 overflow-y-auto">{children}</div>
+      </div>
+    </>
+  );
+}

apps/web/src/components/CapHitSentinel.tsx

@@ -0,0 +1,90 @@
+import { useState } from 'react';
+import { AlertCircle } from 'lucide-react';
+import { toast } from 'sonner';
+import { api } from '@/api/client';
+import type { Message } from '@/api/types';
+import { Button } from '@/components/ui/button';
+
+interface Props {
+  message: Message;
+  // 1-indexed position among cap-hit sentinels in this chat. The first
+  // cap-hit is 1, second is 2, third is 3 (hard ceiling).
+  capHitPosition: number;
+  // Only the most recent sentinel shows the Continue button. Older ones
+  // render text-only — they've already been continued past.
+  isLatest: boolean;
+}
+
+// Hard ceiling = 3 cap-hits per chat ⇒ 2 continues max. Lives here in sync
+// with insertCapHitSentinel's `canContinue = priorCount < 2` rule in
+// services/inference.ts.
+const MAX_CONTINUES = 2;
+
+export function CapHitSentinel({ message, capHitPosition, isLatest }: Props) {
+  const meta = message.metadata;
+  // Defensive parse — if the row is somehow missing metadata we still render
+  // the bare text rather than crashing the chat.
+  const isCapHit =
+    meta !== null && typeof meta === 'object' && meta.kind === 'cap_hit';
+
+  const limit = isCapHit ? meta.limit : null;
+  const canContinue = isCapHit ? meta.can_continue : false;
+  const agentName = isCapHit ? meta.agent_name : null;
+  // `capHitPosition` is 1-indexed; `MAX_CONTINUES - (position - 1)` is the
+  // number of continues remaining including this one. Clamped to ≥0.
+  const remaining = Math.max(0, MAX_CONTINUES - (capHitPosition - 1));
+
+  const [continuing, setContinuing] = useState(false);
+
+  async function handleContinue() {
+    if (continuing || !canContinue || !isLatest) return;
+    setContinuing(true);
+    try {
+      await api.chats.continue(message.chat_id, message.id);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'continue failed');
+    } finally {
+      setContinuing(false);
+    }
+  }
+
+  // Tooltip wording from the v1.8.2 spec. Disabled state takes precedence —
+  // the spec text "Hard limit reached — start a new chat" matches what the
+  // server returns when canContinue is false.
+  const enabledTooltip = limit
+    ? `Resumes with a fresh budget of ${limit} tool calls. ${remaining} continue${remaining === 1 ? '' : 's'} remaining on this chat.`
+    : undefined;
+  const disabledTooltip = 'Hard limit reached — start a new chat';
+
+  return (
+    <div className="rounded-md border border-amber-500/40 bg-amber-500/10 text-sm">
+      <div className="px-3 py-2 flex items-start gap-2">
+        <AlertCircle className="size-4 text-amber-500 shrink-0 mt-0.5" />
+        <div className="flex-1 min-w-0 space-y-1">
+          <div className="text-xs font-medium text-amber-700 dark:text-amber-300">
+            {isCapHit && limit !== null
+              ? `Reached tool budget (${limit}/${limit})${agentName ? ` — ${agentName}` : ''}.`
+              : 'Reached tool budget.'}
+          </div>
+          <div className="text-xs text-muted-foreground">
+            {message.content}
+          </div>
+          {isLatest && (
+            <div className="pt-1">
+              <Button
+                type="button"
+                size="sm"
+                variant="outline"
+                onClick={() => void handleContinue()}
+                disabled={!canContinue || continuing}
+                title={canContinue ? enabledTooltip : disabledTooltip}
+              >
+                {continuing ? 'Continuing…' : 'Continue'}
+              </Button>
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}

apps/web/src/components/ChatInput.tsx

@@ -1,27 +1,47 @@
-import { useCallback, useEffect, useRef, useState, type KeyboardEvent } from 'react';
+import { useCallback, useEffect, useRef, useState, type DragEvent, type KeyboardEvent } from 'react';
 import { Send } from 'lucide-react';
 import { toast } from 'sonner';
 import { Textarea } from '@/components/ui/textarea';
 import { Button } from '@/components/ui/button';
-import { flattenToMessage, inferLanguage, type Attachment } from '@/lib/attachments';
+import {
+  flattenToMessage,
+  inferLanguage,
+  looksBinary,
+  MAX_FILE_SIZE_BYTES,
+  PASTE_INLINE_MAX_LINES,
+  type Attachment,
+} from '@/lib/attachments';
 import { AttachmentChip } from '@/components/AttachmentChip';
 import { AttachmentPreviewModal } from '@/components/AttachmentPreviewModal';
 import { FileMentionPopover } from '@/components/FileMentionPopover';
+import { DropOverlay } from '@/components/DropOverlay';
+import { AgentPicker } from '@/components/AgentPicker';
 import { api } from '@/api/client';
 import { sessionEvents } from '@/hooks/sessionEvents';
+import { useViewport } from '@/hooks/useViewport';
+
+const MAX_ATTACHMENTS = 10;
 
 interface Props {
   disabled?: boolean;
   projectId: string;
+  // Batch 9: optional so callers that pre-date the agent picker still compile.
+  // When omitted, the toolbar row is hidden entirely.
+  agentId?: string | null;
+  onAgentChange?: (agentId: string | null) => void | Promise<void>;
   onSend: (content: string) => void | Promise<void>;
   onForceSend?: (content: string) => void | Promise<void>;
 }
 
-export function ChatInput({ disabled, projectId, onSend, onForceSend }: Props) {
+export function ChatInput({ disabled, projectId, agentId, onAgentChange, onSend, onForceSend }: Props) {
+  const { isMobile } = useViewport();
   const [value, setValue] = useState('');
   const [busy, setBusy] = useState(false);
   const [attachments, setAttachments] = useState<Attachment[]>([]);
   const [previewAttachment, setPreviewAttachment] = useState<Attachment | null>(null);
+  const [isDraggingOver, setIsDraggingOver] = useState(false);
+  const dropRootRef = useRef<HTMLDivElement | null>(null);
+  const pasteCounterRef = useRef(0);
   const [mentionState, setMentionState] = useState<{
     open: boolean;
     query: string;
@@ -33,8 +53,8 @@ export function ChatInput({ disabled, projectId, onSend, onForceSend }: Props) {
 
   function addAttachment(a: Attachment) {
     setAttachments(prev => {
-      if (prev.length >= 10) {
-        toast.error('Max 10 attachments per message');
+      if (prev.length >= MAX_ATTACHMENTS) {
+        toast.error(`Max ${MAX_ATTACHMENTS} attachments per message`);
         return prev;
       }
       return [...prev, a];
@@ -183,8 +203,169 @@ export function ChatInput({ disabled, projectId, onSend, onForceSend }: Props) {
 
   const closeMention = useCallback(() => setMentionState(null), []);
 
+  // ---- Drag & drop (F1 + F3 + F4) ----------------------------------------
+  // The drop zone is the outer ChatInput container (ref'd as dropRootRef).
+  // onDragLeave only clears the highlight when the cursor leaves the
+  // container, not when it crosses into a child element.
+
+  async function processDroppedFile(file: File) {
+    // Size gate
+    if (file.size > MAX_FILE_SIZE_BYTES) {
+      const mb = (file.size / (1024 * 1024)).toFixed(1);
+      toast.error(`File ${file.name} is too large (${mb} MB). Limit is 5 MB.`);
+      return;
+    }
+    // Read once as ArrayBuffer so we can do byte-level binary detection
+    // before deciding whether to decode as text.
+    let buf: ArrayBuffer;
+    try {
+      buf = await file.arrayBuffer();
+    } catch (err) {
+      toast.error(`Failed to read ${file.name}: ${err instanceof Error ? err.message : String(err)}`);
+      return;
+    }
+    if (looksBinary(buf)) {
+      toast.error(`${file.name} appears to be binary.`);
+      return;
+    }
+    const text = new TextDecoder('utf-8', { fatal: false }).decode(buf);
+    addAttachment({
+      id: crypto.randomUUID(),
+      kind: 'file',
+      filename: file.name,
+      language: inferLanguage(file.name),
+      content: text,
+      source: 'drop',
+    });
+  }
+
+  function isFolderItem(item: DataTransferItem | undefined): boolean {
+    if (!item) return false;
+    // webkitGetAsEntry is non-standard but supported in Chromium + Safari.
+    // If unavailable, we conservatively treat the entry as a file.
+    const entry =
+      typeof item.webkitGetAsEntry === 'function' ? item.webkitGetAsEntry() : null;
+    if (entry && entry.isDirectory) return true;
+    // Heuristic fallback: folders dragged from Finder have type === '' and
+    // a 0-byte File. The empty-type alone isn't reliable for files (some
+    // plaintext drops also lack a type), so we only flag when the entry
+    // explicitly says directory.
+    return false;
+  }
+
+  async function handleDroppedItems(dt: DataTransfer) {
+    // Snapshot items first because reading files inside the loop can
+    // detach the DataTransfer between awaits.
+    const itemsArray: { file: File | null; isFolder: boolean }[] = [];
+    if (dt.items && dt.items.length > 0) {
+      for (let i = 0; i < dt.items.length; i++) {
+        const it = dt.items[i];
+        if (!it || it.kind !== 'file') continue;
+        const folder = isFolderItem(it);
+        const file = folder ? null : it.getAsFile();
+        itemsArray.push({ file, isFolder: folder });
+      }
+    } else {
+      for (let i = 0; i < dt.files.length; i++) {
+        const f = dt.files[i];
+        if (f) itemsArray.push({ file: f, isFolder: false });
+      }
+    }
+
+    let remainingSlots = MAX_ATTACHMENTS - attachments.length;
+    let folderRejected = false;
+    for (const { file, isFolder } of itemsArray) {
+      if (isFolder) {
+        if (!folderRejected) {
+          toast.error('Folders are not supported');
+          folderRejected = true;
+        }
+        continue;
+      }
+      if (!file) continue;
+      if (remainingSlots <= 0) {
+        toast.error(`Attachment limit reached (${MAX_ATTACHMENTS}).`);
+        return;
+      }
+      await processDroppedFile(file);
+      remainingSlots -= 1;
+    }
+  }
+
+  function onDragEnter(e: DragEvent<HTMLDivElement>) {
+    if (disabled || busy) return;
+    e.preventDefault();
+    setIsDraggingOver(true);
+  }
+
+  function onDragOver(e: DragEvent<HTMLDivElement>) {
+    if (disabled || busy) return;
+    e.preventDefault();
+    e.dataTransfer.dropEffect = 'copy';
+  }
+
+  function onDragLeave(e: DragEvent<HTMLDivElement>) {
+    // Only clear when the cursor actually leaves the root container.
+    // relatedTarget is the element being entered; if it's inside the root,
+    // ignore — we're just crossing into a child.
+    const root = dropRootRef.current;
+    if (!root) return;
+    const related = e.relatedTarget as Node | null;
+    if (related && root.contains(related)) return;
+    setIsDraggingOver(false);
+  }
+
+  function onDrop(e: DragEvent<HTMLDivElement>) {
+    e.preventDefault();
+    setIsDraggingOver(false);
+    if (disabled || busy) return;
+    void handleDroppedItems(e.dataTransfer);
+  }
+  // ---- end Drag & drop -----------------------------------------------------
+
+  // ---- Paste-as-attachment (F2) -------------------------------------------
+  // Pasting >PASTE_INLINE_MAX_LINES lines of text becomes a chip rather than
+  // inline content. Image pastes are rejected with a toast. If both text and
+  // image are present (e.g. screenshot tool that sets both), prefer text.
+
+  function onPaste(e: React.ClipboardEvent<HTMLTextAreaElement>) {
+    const cd = e.clipboardData;
+    if (!cd) return;
+    const text = cd.getData('text/plain');
+    const hasImage = Array.from(cd.items ?? []).some((it) =>
+      it.type.startsWith('image/'),
+    );
+    if (text) {
+      const lineCount = text.split('\n').length;
+      if (lineCount > PASTE_INLINE_MAX_LINES) {
+        e.preventDefault();
+        pasteCounterRef.current += 1;
+        addAttachment({
+          id: crypto.randomUUID(),
+          kind: 'paste',
+          filename: `pasted-${pasteCounterRef.current}.txt`,
+          language: 'plaintext',
+          content: text,
+          source: 'paste',
+        });
+      }
+      // <= threshold: let default paste insert inline.
+      return;
+    }
+    if (hasImage) {
+      e.preventDefault();
+      toast.error('Image paste is not supported. Drop a file or paste text.');
+    }
+  }
+  // ---- end Paste-as-attachment --------------------------------------------
+
   function onKeyDown(e: KeyboardEvent<HTMLTextAreaElement>) {
     if (mentionState?.open) return;
+    // IME safety: never act on Enter while an IME composition is in flight
+    // (CJK input methods commit composition via Enter). Without this, the
+    // first Enter of a Japanese/Chinese/Korean composition would submit
+    // instead of finalizing the candidate.
+    if (e.nativeEvent.isComposing) return;
     if (e.key === 'Enter' && e.shiftKey && (e.metaKey || e.ctrlKey) && onForceSend) {
       e.preventDefault();
       void forceSubmit();
@@ -195,7 +376,9 @@ export function ChatInput({ disabled, projectId, onSend, onForceSend }: Props) {
       void submit();
       return;
     }
-    if (e.key === 'Enter' && !e.shiftKey) {
+    // Bare Enter: sends on desktop, inserts a newline on mobile (per spec —
+    // send is via the dedicated button on touch devices).
+    if (e.key === 'Enter' && !e.shiftKey && !isMobile) {
       e.preventDefault();
       void submit();
     }
@@ -219,7 +402,16 @@ export function ChatInput({ disabled, projectId, onSend, onForceSend }: Props) {
   }
 
   return (
-    <div className="border-t">
+    <div
+      ref={dropRootRef}
+      className="border-t relative"
+      style={{ paddingBottom: 'env(safe-area-inset-bottom)' }}
+      onDragEnter={onDragEnter}
+      onDragOver={onDragOver}
+      onDragLeave={onDragLeave}
+      onDrop={onDrop}
+    >
+      <DropOverlay visible={isDraggingOver} />
       <div className="max-w-[1000px] mx-auto w-full">
       {attachments.length > 0 && (
         <div className="flex flex-wrap gap-1.5 px-4 pt-3">
@@ -233,13 +425,30 @@ export function ChatInput({ disabled, projectId, onSend, onForceSend }: Props) {
           ))}
         </div>
       )}
+      {/* Batch 9 toolbar — agent picker. Sits above the input row so it
+          doesn't compete with the send button for vertical alignment.
+          When Batch 7 lands, ModelPicker and the + button join this row. */}
+      {onAgentChange && (
+        <div className="px-4 pt-2 flex items-center gap-1.5">
+          <AgentPicker
+            projectId={projectId}
+            value={agentId ?? null}
+            onChange={onAgentChange}
+          />
+        </div>
+      )}
       <div className="px-4 py-3 flex items-end gap-2">
         <Textarea
           ref={textareaRef}
           value={value}
           onChange={handleChange}
           onKeyDown={onKeyDown}
-          placeholder="Ask about this project. Enter to send, Shift+Enter for newline."
+          onPaste={onPaste}
+          placeholder={
+            isMobile
+              ? 'Ask about this project. Tap send to submit.'
+              : 'Ask about this project. Enter to send · Shift+Enter for newline.'
+          }
           disabled={disabled || busy}
           rows={3}
           className="resize-none min-h-[68px] max-h-[240px]"

apps/web/src/components/ChatTabBar.tsx

@@ -1,6 +1,7 @@
 import { useState } from 'react';
 import { History, MessageSquare, Plus, X } from 'lucide-react';
 import type { Chat, WorkspacePane } from '@/api/types';
+import { StatusDot } from '@/components/StatusDot';
 import {
   ContextMenu,
   ContextMenuContent,
@@ -8,6 +9,7 @@ import {
   ContextMenuSeparator,
   ContextMenuTrigger,
 } from '@/components/ui/context-menu';
+import { useLongPress } from '@/hooks/useLongPress';
 import { cn } from '@/lib/utils';
 
 interface Props {
@@ -40,6 +42,18 @@ export function ChatTabBar({
   const [renamingId, setRenamingId] = useState<string | null>(null);
   const [renameValue, setRenameValue] = useState('');
 
+  // Long-press: dispatch a synthetic contextmenu event on the tab so the
+  // existing Radix ContextMenuTrigger opens at the touch coordinates. Works
+  // because asChild composition makes the tab div the trigger element.
+  const longPress = useLongPress(({ clientX, clientY, target }) => {
+    if (!target || !(target instanceof Element)) return;
+    const tab = target.closest('[data-tab-id]') as HTMLElement | null;
+    if (!tab) return;
+    tab.dispatchEvent(
+      new MouseEvent('contextmenu', { bubbles: true, cancelable: true, clientX, clientY }),
+    );
+  });
+
   function startRename(chatId: string, currentName: string | null) {
     setRenamingId(chatId);
     setRenameValue(currentName ?? '');
@@ -53,7 +67,7 @@ export function ChatTabBar({
   }
 
   return (
-    <div className="flex items-center border-b border-border bg-muted/20 h-8 shrink-0 overflow-x-auto">
+    <div className="flex items-center border-b border-border bg-muted/20 h-8 shrink-0 overflow-x-auto max-md:hidden">
       {tabs.map((chat, tabIdx) => {
         const isActive = tabIdx === pane.activeChatIdx;
         const isLast = tabIdx === tabs.length - 1;
@@ -63,7 +77,13 @@ export function ChatTabBar({
           <ContextMenu key={chat.id}>
             <ContextMenuTrigger asChild>
               <div
+                data-tab-id={chat.id}
                 onClick={() => onSwitchTab(tabIdx)}
+                onTouchStart={longPress.onTouchStart}
+                onTouchMove={longPress.onTouchMove}
+                onTouchEnd={longPress.onTouchEnd}
+                onTouchCancel={longPress.onTouchCancel}
+                style={{ WebkitTouchCallout: 'none' }}
                 className={cn(
                   'group flex items-center gap-1.5 px-3 py-1.5 text-xs border-r border-border cursor-default select-none shrink-0',
                   isActive
@@ -72,6 +92,7 @@ export function ChatTabBar({
                 )}
               >
                 <MessageSquare size={12} className="shrink-0" />
+                <StatusDot chatId={chat.id} />
                 {renamingId === chat.id ? (
                   <input
                     autoFocus
@@ -96,7 +117,7 @@ export function ChatTabBar({
                     e.stopPropagation();
                     onRemoveTab(chat.id);
                   }}
-                  className="p-0.5 hover:bg-muted rounded opacity-0 group-hover:opacity-60 hover:!opacity-100 shrink-0"
+                  className="inline-flex items-center justify-center p-0.5 hover:bg-muted rounded opacity-0 group-hover:opacity-60 hover:!opacity-100 shrink-0 max-md:min-h-[44px] max-md:min-w-[44px] max-md:opacity-100"
                   aria-label="Close tab"
                 >
                   <X size={10} />
@@ -104,6 +125,10 @@ export function ChatTabBar({
               </div>
             </ContextMenuTrigger>
             <ContextMenuContent>
+              <ContextMenuItem onSelect={() => onNewChat()}>
+                New chat
+              </ContextMenuItem>
+              <ContextMenuSeparator />
               <ContextMenuItem onSelect={() => startRename(chat.id, chat.name)}>
                 Rename
               </ContextMenuItem>
@@ -142,7 +167,7 @@ export function ChatTabBar({
         <button
           type="button"
           onClick={onNewChat}
-          className="p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground"
+          className="inline-flex items-center justify-center p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground max-md:min-h-[44px] max-md:min-w-[44px]"
           aria-label="New chat"
           title="New chat"
         >
@@ -152,7 +177,7 @@ export function ChatTabBar({
           type="button"
           onClick={onShowHistory}
           className={cn(
-            'p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground',
+            'inline-flex items-center justify-center p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground max-md:min-h-[44px] max-md:min-w-[44px]',
             pane.kind === 'empty' && 'text-foreground bg-muted/50'
           )}
           aria-label="Session history"
@@ -164,7 +189,7 @@ export function ChatTabBar({
           <button
             type="button"
             onClick={onRemovePane}
-            className="p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground"
+            className="inline-flex items-center justify-center p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground max-md:min-h-[44px] max-md:min-w-[44px]"
             aria-label="Close pane"
             title="Close pane"
           >

apps/web/src/components/DropOverlay.tsx

@@ -0,0 +1,18 @@
+interface Props {
+  visible: boolean;
+}
+
+// Visual cue layered over the ChatInput while a drag is in progress.
+// Pointer-events: none so the underlying drop handler still receives the
+// drop event. Renders nothing when not visible (cheap and out of layout).
+export function DropOverlay({ visible }: Props) {
+  if (!visible) return null;
+  return (
+    <div
+      className="absolute inset-0 z-10 pointer-events-none flex items-center justify-center rounded border-2 border-dashed border-primary bg-background/85"
+      aria-hidden="true"
+    >
+      <div className="text-sm font-medium text-primary">Drop to attach</div>
+    </div>
+  );
+}

apps/web/src/components/MessageBubble.tsx

@@ -4,10 +4,10 @@ import Markdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
 import { ChevronDown, ChevronRight, Copy, RefreshCw, Check, Share2, RotateCw, GitFork, Trash2 } from 'lucide-react';
 import { toast } from 'sonner';
-import type { Chat, Message } from '@/api/types';
+import type { Chat, ErrorReason, Message } from '@/api/types';
 import { api } from '@/api/client';
 import { sessionEvents } from '@/hooks/sessionEvents';
-import { ToolCallCard } from './ToolCallCard';
+import { CapHitSentinel } from './CapHitSentinel';
 import { CodeBlock } from './CodeBlock';
 import { Button } from '@/components/ui/button';
 import {
@@ -19,6 +19,15 @@ import {
   DialogTitle,
 } from '@/components/ui/dialog';
 
+// v1.8.2: human labels for the machine-readable error reasons that ride on
+// failed assistant messages via metadata.kind === 'error'. Kept short so the
+// inline render under "message failed" stays a single muted line.
+const ERROR_REASON_LABELS: Record<ErrorReason, string> = {
+  llm_provider_error: 'LLM provider error',
+  tool_execution_failed: 'Tool execution failed',
+  summary_after_cap_failed: 'Summary after tool budget hit failed',
+};
+
 // Match path-shaped substrings ending in `.ext`. Additionally require a `/`
 // in the match to reduce false positives in prose (e.g. plain `foo.ts` won't
 // match, but `src/foo.ts` will). False positives at the edges are accepted
@@ -94,6 +103,9 @@ function linkifyChildren(children: ReactNode, keyPrefix = 'l'): ReactNode {
 interface Props {
   message: Message;
   sessionChats?: Chat[];
+  // v1.8.2: passed by MessageList's render-item pass for cap-hit sentinels.
+  // Only the most recent sentinel shows the Continue button.
+  capHitInfo?: { position: number; isLatest: boolean };
 }
 
 function MarkdownBody({ content }: { content: string }) {
@@ -266,11 +278,11 @@ function ActionRow({
 
   return (
     <>
-      <div className="flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
+      <div className="flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity max-md:opacity-100">
         <button
           type="button"
           onClick={() => void copy()}
-          className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-foreground"
+          className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-foreground max-md:min-h-[44px] max-md:min-w-[44px]"
           aria-label="Copy message"
           title="Copy"
         >
@@ -281,7 +293,7 @@ function ActionRow({
             type="button"
             onClick={() => void regenerate()}
             disabled={!canRegen || regenerating}
-            className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-foreground disabled:opacity-40 disabled:cursor-not-allowed"
+            className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-foreground disabled:opacity-40 disabled:cursor-not-allowed max-md:min-h-[44px] max-md:min-w-[44px]"
             aria-label="Regenerate message"
             title="Regenerate"
           >
@@ -292,7 +304,7 @@ function ActionRow({
           type="button"
           onClick={() => void fork()}
           disabled={!canFork || forking}
-          className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-foreground disabled:opacity-40 disabled:cursor-not-allowed"
+          className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-foreground disabled:opacity-40 disabled:cursor-not-allowed max-md:min-h-[44px] max-md:min-w-[44px]"
           aria-label="Fork from here"
           title="Fork from here"
         >
@@ -302,7 +314,7 @@ function ActionRow({
           type="button"
           onClick={() => setDeleteOpen(true)}
           disabled={!canDelete}
-          className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-destructive disabled:opacity-40 disabled:cursor-not-allowed"
+          className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-destructive disabled:opacity-40 disabled:cursor-not-allowed max-md:min-h-[44px] max-md:min-w-[44px]"
           aria-label="Delete message"
           title="Delete message"
         >
@@ -464,19 +476,38 @@ function CompactCard({ message, sessionChats }: { message: Message; sessionChats
   );
 }
 
-export function MessageBubble({ message, sessionChats }: Props) {
+export function MessageBubble({ message, sessionChats, capHitInfo }: Props) {
   if (message.kind === 'compact') {
     return <CompactCard message={message} sessionChats={sessionChats} />;
   }
 
-  if (message.role === 'tool') {
-    return <ToolCallCard message={message} />;
+  // v1.8.2: cap-hit sentinels render as a distinct system bubble with a
+  // Continue button. MessageList's pre-render pass tags each sentinel with
+  // its position; only the latest gets the actionable button.
+  if (
+    message.role === 'system' &&
+    message.metadata?.kind === 'cap_hit' &&
+    capHitInfo
+  ) {
+    return (
+      <CapHitSentinel
+        message={message}
+        capHitPosition={capHitInfo.position}
+        isLatest={capHitInfo.isLatest}
+      />
+    );
   }
 
+  // v1.8.2: tool messages and assistant tool_calls are now rendered by
+  // MessageList via ToolCallLine / ToolCallGroup. Tool-role messages reach
+  // this point only if MessageList didn't consume them (shouldn't happen,
+  // but guard against it by rendering nothing rather than a stale card).
+  if (message.role === 'tool') return null;
+
   if (message.role === 'user') {
     return (
       <div className="group 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">
+        <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>
         <ActionRow message={message} />
@@ -487,15 +518,18 @@ export function MessageBubble({ message, sessionChats }: Props) {
   const isStreaming = message.status === 'streaming';
   const failed = message.status === 'failed';
   const hasContent = message.content.length > 0;
-  const hasToolCalls = (message.tool_calls?.length ?? 0) > 0;
+  // v1.8.2: if metadata stamps an error reason, surface it inline under the
+  // generic "message failed" line. Keeps the user's eye where it already is
+  // rather than introducing a separate banner.
+  const errorMeta =
+    message.metadata !== null && message.metadata.kind === 'error'
+      ? message.metadata
+      : null;
 
   return (
     <div className="group flex flex-col gap-2">
-      {message.tool_calls?.map((tc) => (
-        <ToolCallCard key={tc.id} toolCall={tc} />
-      ))}
-      {(hasContent || (!hasToolCalls && isStreaming)) && (
-        <div className="max-w-[90%] text-sm leading-relaxed space-y-2">
+      {(hasContent || isStreaming) && (
+        <div className="max-w-[90%] text-sm leading-relaxed space-y-2 break-words min-w-0">
           {hasContent ? <MarkdownBody content={message.content} /> : null}
           {isStreaming && (
             <span className="inline-block w-1.5 h-3.5 align-baseline bg-muted-foreground/60 animate-pulse" />
@@ -503,12 +537,18 @@ export function MessageBubble({ message, sessionChats }: Props) {
         </div>
       )}
       {failed && (
-        <div className="text-xs text-destructive">message failed</div>
+        <div className="text-xs text-destructive">
+          message failed
+          {errorMeta && (
+            <span className="block text-muted-foreground mt-0.5">
+              {ERROR_REASON_LABELS[errorMeta.error_reason]}
+              {errorMeta.error_text ? ` — ${errorMeta.error_text}` : ''}
+            </span>
+          )}
+        </div>
       )}
       {!isStreaming && <StatsLine message={message} />}
-      {!isStreaming && (hasContent || hasToolCalls) && (
-        <ActionRow message={message} />
-      )}
+      {!isStreaming && hasContent && <ActionRow message={message} />}
     </div>
   );
 }

apps/web/src/components/MessageList.tsx

@@ -1,15 +1,128 @@
-import { useEffect, useRef } from 'react';
+import { useEffect, useMemo, useRef } from 'react';
 import type { Chat, Message } from '@/api/types';
 import { MessageBubble } from './MessageBubble';
+import { ToolCallGroup } from './ToolCallGroup';
+import { ToolCallLine, type ToolRun } from './ToolCallLine';
 
 interface Props {
   messages: Message[];
   sessionChats?: Chat[];
 }
 
+// v1.8.2: pre-render units. The single linear `messages` array gets walked
+// into a render-time list where each tool_call is a first-class item and
+// tool_result messages are folded onto their matching tool_run by id.
+type RenderItem =
+  | { kind: 'message'; message: Message; capHitInfo?: { position: number; isLatest: boolean } }
+  | { kind: 'tool_run'; run: ToolRun; key: string }
+  | { kind: 'tool_group'; runs: ToolRun[]; key: string };
+
+const GROUP_THRESHOLD = 3;
+
+function isCapHitSentinel(m: Message): boolean {
+  return m.role === 'system' && m.metadata?.kind === 'cap_hit';
+}
+
+// First pass: walk messages chronologically, expanding assistant tool_calls
+// into per-call run items and folding tool_result messages onto their
+// matching runs. Tool messages themselves never produce a render item.
+// Assistant messages produce a text render item only when they have text;
+// pure tool-call messages are "transparent" so consecutive tool runs can
+// still group across them.
+function flatten(messages: Message[]): RenderItem[] {
+  const items: RenderItem[] = [];
+  const runsByCallId = new Map<string, ToolRun>();
+
+  for (const m of messages) {
+    if (m.role === 'tool') {
+      if (m.tool_results) {
+        const run = runsByCallId.get(m.tool_results.tool_call_id);
+        if (run) run.result = m.tool_results;
+      }
+      continue;
+    }
+    const hasToolCalls = m.tool_calls != null && m.tool_calls.length > 0;
+    const hasText = m.content.length > 0;
+    if (m.role === 'assistant' && hasToolCalls) {
+      if (hasText || m.status === 'streaming') {
+        items.push({ kind: 'message', message: m });
+      }
+      for (const tc of m.tool_calls!) {
+        const run: ToolRun = { call: tc, result: null };
+        runsByCallId.set(tc.id, run);
+        items.push({ kind: 'tool_run', run, key: tc.id });
+      }
+      continue;
+    }
+    items.push({ kind: 'message', message: m });
+  }
+
+  return items;
+}
+
+// Second pass: collapse runs of >=GROUP_THRESHOLD consecutive tool_run items
+// of the same tool name into a single tool_group. Any other render item
+// (text bubble, sentinel, user message) breaks the chain.
+function group(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;
+}
+
+// Third pass: number cap-hit sentinels (1-indexed) and mark the latest.
+// CapHitSentinel uses position to compute the "N continues remaining"
+// tooltip, and isLatest to gate the Continue button (only the most recent
+// sentinel is actionable).
+function stampCapHits(items: RenderItem[]): RenderItem[] {
+  const totalCapHits = items.reduce(
+    (n, it) => n + (it.kind === 'message' && isCapHitSentinel(it.message) ? 1 : 0),
+    0,
+  );
+  if (totalCapHits === 0) return items;
+  let index = 0;
+  return items.map((it) => {
+    if (it.kind !== 'message' || !isCapHitSentinel(it.message)) return it;
+    index += 1;
+    return {
+      ...it,
+      capHitInfo: { position: index, isLatest: index === totalCapHits },
+    };
+  });
+}
+
 export function MessageList({ messages, sessionChats }: Props) {
   const endRef = useRef<HTMLDivElement>(null);
 
+  const renderItems = useMemo(() => stampCapHits(group(flatten(messages))), [messages]);
+
   useEffect(() => {
     endRef.current?.scrollIntoView({ block: 'end' });
   }, [messages]);
@@ -25,9 +138,22 @@ export function MessageList({ messages, sessionChats }: Props) {
   return (
     <div className="flex-1 overflow-y-auto">
       <div className="max-w-[1000px] mx-auto w-full px-6 py-4 space-y-4">
-        {messages.map((m) => (
-          <MessageBubble key={m.id} message={m} sessionChats={sessionChats} />
-        ))}
+        {renderItems.map((item) => {
+          if (item.kind === 'message') {
+            return (
+              <MessageBubble
+                key={item.message.id}
+                message={item.message}
+                sessionChats={sessionChats}
+                capHitInfo={item.capHitInfo}
+              />
+            );
+          }
+          if (item.kind === 'tool_run') {
+            return <ToolCallLine key={item.key} run={item.run} />;
+          }
+          return <ToolCallGroup key={item.key} runs={item.runs} />;
+        })}
         <div ref={endRef} />
       </div>
     </div>

apps/web/src/components/MobileTabSwitcher.tsx

@@ -0,0 +1,207 @@
+import { useState } from 'react';
+import {
+  Bot,
+  ChevronDown,
+  Edit2,
+  MessageSquare,
+  MoreHorizontal,
+  Terminal,
+  X,
+} from 'lucide-react';
+import { toast } from 'sonner';
+import type { Chat, WorkspacePane } from '@/api/types';
+import { BottomSheet } from '@/components/BottomSheet';
+import { StatusDot } from '@/components/StatusDot';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+import { useLongPress } from '@/hooks/useLongPress';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  panes: WorkspacePane[];
+  activePaneIdx: number;
+  chats: Chat[];
+  onSwitchPane: (idx: number) => void;
+  onRemovePane: (idx: number) => void;
+  onRenameChat: (chatId: string, name: string) => Promise<void>;
+}
+
+function paneIcon(kind: WorkspacePane['kind']) {
+  if (kind === 'terminal') return <Terminal size={14} />;
+  if (kind === 'agent') return <Bot size={14} />;
+  return <MessageSquare size={14} />;
+}
+
+function paneActiveChatId(pane: WorkspacePane | undefined): string | null {
+  if (!pane) return null;
+  if (pane.chatId) return pane.chatId;
+  const idx = pane.activeChatIdx;
+  if (idx < 0 || idx >= pane.chatIds.length) return null;
+  return pane.chatIds[idx] ?? null;
+}
+
+function paneLabel(pane: WorkspacePane, chats: Chat[]): string {
+  const cid = paneActiveChatId(pane);
+  if (cid) {
+    const c = chats.find((x) => x.id === cid);
+    if (c) return c.name ?? 'New chat';
+  }
+  if (pane.kind === 'chat') return 'Chat';
+  if (pane.kind === 'terminal') return 'Terminal';
+  if (pane.kind === 'agent') return 'Agent';
+  return 'Empty';
+}
+
+export function MobileTabSwitcher({
+  panes,
+  activePaneIdx,
+  chats,
+  onSwitchPane,
+  onRemovePane,
+  onRenameChat,
+}: Props) {
+  const [open, setOpen] = useState(false);
+  const [renamingChatId, setRenamingChatId] = useState<string | null>(null);
+  const [renameValue, setRenameValue] = useState('');
+
+  const active = panes[activePaneIdx];
+  const activeLabel = active ? paneLabel(active, chats) : 'Empty';
+  const activeChatId = paneActiveChatId(active);
+
+  // Long-press mirrors ChatTabBar: synthesize a contextmenu event on the row
+  // so the trailing kebab's Radix DropdownMenu opens at the touch point.
+  const longPress = useLongPress(({ clientX, clientY, target }) => {
+    if (!target || !(target instanceof Element)) return;
+    const row = target.closest('[data-pane-id]') as HTMLElement | null;
+    if (!row) return;
+    const trigger = row.querySelector('[data-pane-kebab]') as HTMLElement | null;
+    if (trigger) {
+      trigger.click();
+      return;
+    }
+    row.dispatchEvent(
+      new MouseEvent('contextmenu', { bubbles: true, cancelable: true, clientX, clientY }),
+    );
+  });
+
+  function startRename(chatId: string, currentName: string | null) {
+    setRenamingChatId(chatId);
+    setRenameValue(currentName ?? '');
+  }
+  async function finishRename() {
+    if (renamingChatId && renameValue.trim()) {
+      try {
+        await onRenameChat(renamingChatId, renameValue.trim());
+      } catch (err) {
+        toast.error(err instanceof Error ? err.message : 'rename failed');
+      }
+    }
+    setRenamingChatId(null);
+  }
+
+  function handleSwitchPane(idx: number) {
+    onSwitchPane(idx);
+    setOpen(false);
+  }
+
+  return (
+    <>
+      <button
+        type="button"
+        onClick={() => setOpen(true)}
+        className="flex-1 inline-flex items-center gap-1.5 min-h-[44px] px-3 text-sm rounded-full bg-muted/40 hover:bg-muted/70 text-foreground min-w-0"
+        aria-label="Switch pane"
+      >
+        <span className="shrink-0 text-muted-foreground">{paneIcon(active?.kind ?? 'chat')}</span>
+        <StatusDot chatId={activeChatId} />
+        <span className="truncate flex-1 text-left">{activeLabel}</span>
+        <ChevronDown size={14} className="opacity-60 shrink-0" />
+      </button>
+
+      <BottomSheet open={open} onClose={() => setOpen(false)} title="Panes">
+        <ul className="px-2 py-2 space-y-1">
+          {panes.map((pane, idx) => {
+            const isActive = idx === activePaneIdx;
+            const cid = paneActiveChatId(pane);
+            const chat = cid ? chats.find((c) => c.id === cid) ?? null : null;
+            const label = paneLabel(pane, chats);
+            return (
+              <li
+                key={pane.id}
+                data-pane-id={pane.id}
+                onTouchStart={longPress.onTouchStart}
+                onTouchMove={longPress.onTouchMove}
+                onTouchEnd={longPress.onTouchEnd}
+                onTouchCancel={longPress.onTouchCancel}
+                onClick={() => handleSwitchPane(idx)}
+                style={{ WebkitTouchCallout: 'none' }}
+                className={cn(
+                  'flex items-center gap-2 px-3 py-2 rounded min-h-[48px] cursor-default select-none',
+                  isActive
+                    ? 'bg-accent/40 border-l-2 border-primary'
+                    : 'hover:bg-muted/50',
+                )}
+              >
+                <span className="shrink-0 text-muted-foreground">{paneIcon(pane.kind)}</span>
+                <StatusDot chatId={cid ?? null} />
+                {renamingChatId === cid && cid ? (
+                  <input
+                    autoFocus
+                    value={renameValue}
+                    onChange={(e) => setRenameValue(e.target.value)}
+                    onBlur={() => void finishRename()}
+                    onKeyDown={(e) => {
+                      if (e.key === 'Enter') void finishRename();
+                      if (e.key === 'Escape') setRenamingChatId(null);
+                    }}
+                    onClick={(e) => e.stopPropagation()}
+                    className="bg-transparent border-b border-border text-sm outline-none flex-1 min-w-0"
+                  />
+                ) : (
+                  <span className="truncate flex-1 text-sm">{label}</span>
+                )}
+                {isActive && (
+                  <span aria-hidden="true" className="text-primary text-xs shrink-0">
+                    ✓
+                  </span>
+                )}
+                <DropdownMenu>
+                  <DropdownMenuTrigger asChild>
+                    <button
+                      type="button"
+                      data-pane-kebab
+                      onClick={(e) => e.stopPropagation()}
+                      className="inline-flex items-center justify-center p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground min-h-[44px] min-w-[44px]"
+                      aria-label="Pane options"
+                    >
+                      <MoreHorizontal size={14} />
+                    </button>
+                  </DropdownMenuTrigger>
+                  <DropdownMenuContent align="end">
+                    {chat && (
+                      <DropdownMenuItem onSelect={() => startRename(chat.id, chat.name)}>
+                        <Edit2 size={14} /> Rename chat
+                      </DropdownMenuItem>
+                    )}
+                    <DropdownMenuItem
+                      disabled={panes.length <= 1}
+                      onSelect={() => onRemovePane(idx)}
+                    >
+                      <X size={14} /> Close pane
+                    </DropdownMenuItem>
+                  </DropdownMenuContent>
+                </DropdownMenu>
+              </li>
+            );
+          })}
+        </ul>
+        {/* v1.8: New-pane button moved out of the sheet to the header row 2
+            (see NewPaneMenu). Sheet is for switching only. */}
+      </BottomSheet>
+    </>
+  );
+}

apps/web/src/components/NewPaneMenu.tsx

@@ -0,0 +1,44 @@
+import { Bot, MessageSquare, Plus, Terminal } from 'lucide-react';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
+
+interface Props {
+  onAddPane: (kind: 'chat' | 'terminal' | 'agent') => void;
+  disabled?: boolean;
+}
+
+// v1.8 row-2 right cluster: mirrors the desktop Workspace.tsx Split dropdown.
+// Terminal and Agent items pass through to addSplitPane which already shows
+// "coming soon" toasts; rendering them here matches the Batch 3 workspace
+// model so the UI is forward-compatible with BooTerm/BooCoder.
+export function NewPaneMenu({ onAddPane, disabled }: Props) {
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <button
+          type="button"
+          disabled={disabled}
+          className="inline-flex items-center justify-center min-h-[44px] min-w-[44px] rounded-full bg-muted/40 hover:bg-muted/70 text-foreground disabled:opacity-40 disabled:cursor-not-allowed shrink-0"
+          aria-label="New pane"
+        >
+          <Plus size={16} />
+        </button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end">
+        <DropdownMenuItem onSelect={() => onAddPane('chat')}>
+          <MessageSquare size={14} /> New chat
+        </DropdownMenuItem>
+        <DropdownMenuItem onSelect={() => onAddPane('terminal')}>
+          <Terminal size={14} /> New terminal
+        </DropdownMenuItem>
+        <DropdownMenuItem onSelect={() => onAddPane('agent')}>
+          <Bot size={14} /> New agent
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}

apps/web/src/components/ProjectSidebar.tsx

@@ -20,6 +20,9 @@ import {
 import { AddProjectModal } from './AddProjectModal';
 import { api } from '@/api/client';
 import { useSidebar } from '@/hooks/useSidebar';
+import { useSidebarDrawer } from '@/hooks/useSidebarDrawer';
+import { useViewport } from '@/hooks/useViewport';
+import { usePullToRefresh } from '@/hooks/usePullToRefresh';
 import type { SidebarProject } from '@/api/types';
 import { giteaUrlFor } from '@/lib/projectUrls';
 import { cn } from '@/lib/utils';
@@ -195,8 +198,24 @@ export function ProjectSidebar() {
   const rowCls = (active: boolean) =>
     active ? 'bg-sidebar-accent text-sidebar-accent-foreground' : 'hover:bg-sidebar-accent/60';
 
+  const { open: drawerOpen } = useSidebarDrawer();
+  const { isMobile } = useViewport();
+  const pull = usePullToRefresh(() => retry(), { enabled: isMobile });
+
+  // On mobile the sidebar is a slide-in drawer (fixed, z-40, off-screen by
+  // default). On desktop it sits inline as a normal flex column. The
+  // backdrop is rendered by AppShell; drawer-open state lives in
+  // SidebarDrawerProvider.
+  const asideCls = isMobile
+    ? cn(
+        'fixed inset-y-0 left-0 z-40 w-60 border-r bg-sidebar text-sidebar-foreground flex flex-col',
+        'transition-transform duration-200 ease-out',
+        drawerOpen ? 'translate-x-0' : '-translate-x-full',
+      )
+    : 'w-60 shrink-0 border-r bg-sidebar text-sidebar-foreground flex flex-col h-screen';
+
   return (
-    <aside className="w-60 shrink-0 border-r bg-sidebar text-sidebar-foreground flex flex-col h-screen">
+    <aside className={asideCls}>
       <div className="px-4 py-3 border-b flex items-center justify-between">
         <NavLink to="/" className="font-semibold tracking-tight text-base">
           BooCode
@@ -206,7 +225,30 @@ export function ProjectSidebar() {
         </Button>
       </div>
 
-      <nav className="flex-1 overflow-y-auto py-2">
+      {isMobile && (pull.pullDist > 0 || pull.refreshing) && (
+        <div
+          className="flex items-center justify-center text-[10px] uppercase tracking-wide text-muted-foreground border-b overflow-hidden shrink-0"
+          style={{
+            height: pull.refreshing ? 32 : Math.min(pull.pullDist, 80),
+            transition: pull.pullDist === 0 && !pull.refreshing ? 'height 0.2s ease' : undefined,
+          }}
+          aria-live="polite"
+        >
+          {pull.refreshing
+            ? 'Refreshing…'
+            : pull.pullDist >= 80
+            ? 'Release to refresh'
+            : 'Pull to refresh'}
+        </div>
+      )}
+
+      <nav
+        className="flex-1 overflow-y-auto py-2"
+        onTouchStart={isMobile ? pull.onTouchStart : undefined}
+        onTouchMove={isMobile ? pull.onTouchMove : undefined}
+        onTouchEnd={isMobile ? pull.onTouchEnd : undefined}
+        onTouchCancel={isMobile ? pull.onTouchEnd : undefined}
+      >
         {loading && data == null && (
           <div className="space-y-2 px-2">
             {[0, 1, 2, 3].map((i) => (

apps/web/src/components/RightRail.tsx

@@ -4,8 +4,11 @@ import { api } from '@/api/client';
 import type { FileEntry } from '@/api/types';
 import { inferLanguage } from '@/lib/attachments';
 import { sessionEvents } from '@/hooks/sessionEvents';
+import { useRightRailDrawer } from '@/hooks/useRightRailDrawer';
+import { useViewport } from '@/hooks/useViewport';
 import { FileViewerOverlay } from '@/components/FileViewerOverlay';
 import { Input } from '@/components/ui/input';
+import { cn } from '@/lib/utils';
 
 interface Props {
   projectId: string;
@@ -25,6 +28,8 @@ function joinPath(parent: string, name: string): string {
 }
 
 export function RightRail({ projectId }: Props) {
+  const { isMobile } = useViewport();
+  const { open: drawerOpen, setOpen: setDrawerOpen } = useRightRailDrawer();
   const [open, setOpen] = useState(() => {
     try { return localStorage.getItem(`${STORAGE_KEY}.open`) !== 'false'; } catch { return true; }
   });
@@ -34,6 +39,19 @@ export function RightRail({ projectId }: Props) {
   const [fullFileList, setFullFileList] = useState<string[] | null>(null);
   const [viewerFile, setViewerFile] = useState<{ path: string; content: string } | null>(null);
 
+  // Combined open state: on mobile use the global drawer state (toggled by
+  // the Session header's FolderTree button); on desktop use the persistent
+  // internal state.
+  const isOpen = isMobile ? drawerOpen : open;
+  const closeRail = useCallback(() => {
+    if (isMobile) setDrawerOpen(false);
+    else setOpen(false);
+  }, [isMobile, setDrawerOpen]);
+  const openRail = useCallback(() => {
+    if (isMobile) setDrawerOpen(true);
+    else setOpen(true);
+  }, [isMobile, setDrawerOpen]);
+
   useEffect(() => {
     // best-effort; ignore failure because localStorage may be unavailable (quota, private mode)
     try { localStorage.setItem(`${STORAGE_KEY}.open`, String(open)); } catch {}
@@ -56,9 +74,9 @@ export function RightRail({ projectId }: Props) {
   }, [projectId]);
 
   useEffect(() => {
-    if (!open) return;
+    if (!isOpen) return;
     if (!cache.has('')) void loadDir('');
-  }, [open, cache, loadDir]);
+  }, [isOpen, cache, loadDir]);
 
   function toggleDir(dirPath: string) {
     setExpandedDirs((prev) => {
@@ -108,12 +126,14 @@ export function RightRail({ projectId }: Props) {
   useEffect(() => {
     return sessionEvents.subscribe((event) => {
       if (event.type !== 'open_file_in_browser') return;
-      if (!open) setOpen(true);
+      if (!isOpen) openRail();
       void openFile(event.path);
     });
-  }, [open, projectId]);
+  }, [isOpen, openRail, projectId]);
 
-  if (!open) {
+  // Desktop closed state: render the floating chevron handle. Mobile never
+  // shows the handle — the toggle lives in the Session header on mobile.
+  if (!isMobile && !open) {
     return (
       <button
         type="button"
@@ -128,15 +148,25 @@ export function RightRail({ projectId }: Props) {
 
   const rootEntries = cache.get('') ?? [];
 
+  // Mobile: render as fixed-position right-side drawer (always mounted so
+  // the transform transition can animate in/out). Desktop: inline aside.
+  const asideCls = isMobile
+    ? cn(
+        'fixed inset-y-0 right-0 z-40 w-[85vw] max-w-sm border-l bg-sidebar flex flex-col overflow-hidden',
+        'transition-transform duration-200 ease-out',
+        drawerOpen ? 'translate-x-0' : 'translate-x-full',
+      )
+    : 'w-64 shrink-0 border-l bg-sidebar flex flex-col h-full overflow-hidden';
+
   return (
     <>
-      <aside className="w-64 shrink-0 border-l bg-sidebar flex flex-col h-full overflow-hidden">
+      <aside className={asideCls}>
         <div className="flex items-center gap-2 px-3 py-2 border-b shrink-0">
           <span className="text-xs font-medium flex-1">Files</span>
           <button
             type="button"
-            onClick={() => setOpen(false)}
-            className="p-1 rounded hover:bg-muted text-muted-foreground"
+            onClick={closeRail}
+            className="p-1 rounded hover:bg-muted text-muted-foreground max-md:min-h-[44px] max-md:min-w-[44px]"
             aria-label="Close file browser"
           >
             <PanelRightClose size={14} />

apps/web/src/components/StatusDot.tsx

@@ -0,0 +1,36 @@
+import { useChatStatus, type DerivedStatus } from '@/hooks/useChatStatus';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  chatId: string | null | undefined;
+  className?: string;
+}
+
+const STATUS_CLASS: Record<DerivedStatus, string> = {
+  working: 'bg-amber-500 animate-pulse',
+  idle_warm: 'bg-emerald-500',
+  idle_cold: 'bg-muted-foreground/40',
+  error: 'bg-destructive',
+};
+
+const STATUS_LABEL: Record<DerivedStatus, string> = {
+  working: 'working',
+  idle_warm: 'idle',
+  idle_cold: 'idle',
+  error: 'error',
+};
+
+export function StatusDot({ chatId, className }: Props) {
+  const status = useChatStatus(chatId);
+  return (
+    <span
+      aria-label={`Status: ${STATUS_LABEL[status]}`}
+      title={STATUS_LABEL[status]}
+      className={cn(
+        'inline-block w-1.5 h-1.5 rounded-full shrink-0',
+        STATUS_CLASS[status],
+        className,
+      )}
+    />
+  );
+}

apps/web/src/components/SwipeablePaneTab.tsx

@@ -0,0 +1,103 @@
+import { useRef, useState } from 'react';
+import type { TouchEvent } from 'react';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  label: string;
+  isActive: boolean;
+  onTap: () => void;
+  onClose: () => void;
+  canClose: boolean;
+}
+
+const CLOSE_THRESHOLD = 60;
+const MAX_TRAVEL = 120;
+const VERTICAL_BAIL = 30;
+
+// Pane tab with horizontal swipe-to-close (mobile only). Tracks horizontal
+// finger movement; if vertical exceeds VERTICAL_BAIL the gesture is cancelled
+// (so vertical scroll still works). On release past CLOSE_THRESHOLD, the
+// onClose callback fires. Otherwise the tab snaps back. Hand-rolled per spec.
+export function SwipeablePaneTab({ label, isActive, onTap, onClose, canClose }: Props) {
+  const [translateX, setTranslateX] = useState(0);
+  const [dragging, setDragging] = useState(false);
+  const startRef = useRef<{ x: number; y: number; bailed: boolean } | null>(null);
+
+  const onTouchStart = (e: TouchEvent) => {
+    if (!canClose) return;
+    const t = e.touches[0];
+    if (!t) return;
+    startRef.current = { x: t.clientX, y: t.clientY, bailed: false };
+    setDragging(true);
+  };
+
+  const onTouchMove = (e: TouchEvent) => {
+    const start = startRef.current;
+    if (!start || start.bailed) return;
+    const t = e.touches[0];
+    if (!t) return;
+    const dx = t.clientX - start.x;
+    const dy = t.clientY - start.y;
+    if (Math.abs(dy) > VERTICAL_BAIL) {
+      start.bailed = true;
+      setTranslateX(0);
+      setDragging(false);
+      return;
+    }
+    if (dx < 0) {
+      setTranslateX(Math.max(dx, -MAX_TRAVEL));
+    } else {
+      setTranslateX(0);
+    }
+  };
+
+  const onTouchEnd = () => {
+    const start = startRef.current;
+    startRef.current = null;
+    setDragging(false);
+    if (!start || start.bailed) {
+      setTranslateX(0);
+      return;
+    }
+    const tx = translateX;
+    if (tx <= -CLOSE_THRESHOLD) {
+      onClose();
+      // Don't reset translateX; the parent will unmount this tab.
+    } else {
+      setTranslateX(0);
+    }
+  };
+
+  // Opacity fades from 1 -> 0.4 as the tab approaches the close threshold.
+  const opacity =
+    translateX < 0
+      ? Math.max(0.4, 1 - (Math.abs(translateX) / CLOSE_THRESHOLD) * 0.6)
+      : 1;
+
+  return (
+    <button
+      type="button"
+      onClick={onTap}
+      onTouchStart={onTouchStart}
+      onTouchMove={onTouchMove}
+      onTouchEnd={onTouchEnd}
+      onTouchCancel={onTouchEnd}
+      style={{
+        transform: `translateX(${translateX}px)`,
+        opacity,
+        // Only animate when releasing (snap-back); during drag the transform
+        // tracks the finger 1:1 for a tight feel.
+        transition: dragging ? undefined : 'transform 0.15s ease, opacity 0.15s ease',
+      }}
+      className={cn(
+        'shrink-0 px-3 py-2 text-xs rounded min-h-[44px] min-w-[44px]',
+        isActive
+          ? 'bg-background text-foreground border'
+          : 'text-muted-foreground hover:bg-muted/40',
+      )}
+      aria-current={isActive ? 'true' : undefined}
+    >
+      <span className="truncate max-w-[140px] inline-block">{label}</span>
+    </button>
+  );
+}

apps/web/src/components/ToolCallCard.tsx

@@ -1,102 +0,0 @@
-import { useState } from 'react';
-import type { ReactNode } from 'react';
-import { ChevronRight, Wrench } from 'lucide-react';
-import type { Message, ToolCall } from '@/api/types';
-import { sessionEvents } from '@/hooks/sessionEvents';
-
-interface Props {
-  message?: Message;
-  toolCall?: ToolCall;
-}
-
-// Same regex/heuristic as MessageBubble: paths ending in `.ext` with at
-// least one `/`. Linkifies file paths emitted by tools like grep / find_files
-// so they're clickable.
-const PATH_REGEX = /([a-zA-Z0-9._/-]+\.[a-zA-Z0-9]+)/g;
-
-function linkifyOutput(text: string): ReactNode[] {
-  const out: ReactNode[] = [];
-  let lastIdx = 0;
-  let idx = 0;
-  for (const match of text.matchAll(PATH_REGEX)) {
-    const matchedText = match[0];
-    const start = match.index ?? 0;
-    if (!matchedText.includes('/')) continue;
-    if (start > lastIdx) out.push(text.slice(lastIdx, start));
-    out.push(
-      <button
-        key={idx}
-        type="button"
-        onClick={() =>
-          sessionEvents.emit({
-            type: 'open_file_in_browser',
-            path: matchedText,
-          })
-        }
-        className="text-primary underline cursor-pointer hover:text-primary/80"
-      >
-        {matchedText}
-      </button>
-    );
-    lastIdx = start + matchedText.length;
-    idx += 1;
-  }
-  if (lastIdx < text.length) out.push(text.slice(lastIdx));
-  return out.length > 0 ? out : [text];
-}
-
-export function ToolCallCard({ message, toolCall }: Props) {
-  const [open, setOpen] = useState(false);
-  const tc = toolCall ?? message?.tool_calls?.[0];
-  const result = message?.tool_results;
-
-  const name = tc?.name ?? 'tool';
-  const args = tc?.args ?? {};
-  const error = result?.error;
-  const output = result?.output;
-  const truncated = result?.truncated;
-
-  return (
-    <div className="rounded-md border border-border bg-muted/30 text-sm overflow-hidden">
-      <button
-        type="button"
-        onClick={() => setOpen((v) => !v)}
-        className="w-full flex items-center gap-2 px-2.5 py-1.5 hover:bg-muted/60 text-left"
-      >
-        <ChevronRight
-          className={`size-3.5 transition-transform ${open ? 'rotate-90' : ''}`}
-        />
-        <Wrench className="size-3.5 opacity-70" />
-        <span className="font-mono font-medium">{name}</span>
-        <span className="font-mono text-xs text-muted-foreground truncate min-w-0 flex-1">
-          {JSON.stringify(args)}
-        </span>
-        {error && (
-          <span className="text-xs text-destructive font-medium ml-2">error</span>
-        )}
-        {truncated && (
-          <span className="text-xs text-muted-foreground ml-2">truncated</span>
-        )}
-      </button>
-      {open && (
-        <div className="px-2.5 py-2 border-t bg-background/40">
-          {error ? (
-            <pre className="text-xs text-destructive font-mono whitespace-pre-wrap">
-              {error}
-            </pre>
-          ) : output !== undefined ? (
-            <pre className="text-xs font-mono whitespace-pre-wrap overflow-x-auto max-h-72 overflow-y-auto">
-              {linkifyOutput(
-                typeof output === 'string'
-                  ? output
-                  : JSON.stringify(output, null, 2)
-              )}
-            </pre>
-          ) : (
-            <div className="text-xs text-muted-foreground">no result yet</div>
-          )}
-        </div>
-      )}
-    </div>
-  );
-}

apps/web/src/components/ToolCallGroup.tsx

@@ -0,0 +1,64 @@
+import { useState } from 'react';
+import { ChevronRight } from 'lucide-react';
+import { ToolCallLine, runStatus, type ToolRun } from './ToolCallLine';
+
+interface Props {
+  // All runs must share the same tool name. Caller (MessageList grouping
+  // pass) enforces that invariant.
+  runs: ToolRun[];
+}
+
+export function ToolCallGroup({ runs }: Props) {
+  const [open, setOpen] = useState(false);
+  if (runs.length === 0) return null;
+  const toolName = runs[0]!.call.name;
+  const count = runs.length;
+
+  // Group-level status: pending if any are still running, error if any
+  // finished with an error, otherwise success. Matches the visual the user
+  // gets when scanning a long run of greps / view_files.
+  let pending = 0;
+  let errored = 0;
+  for (const r of runs) {
+    const s = runStatus(r);
+    if (s === 'pending') pending += 1;
+    else if (s === 'error') errored += 1;
+  }
+  const summaryParts: string[] = [];
+  if (pending > 0) summaryParts.push(`${pending} running`);
+  if (errored > 0) summaryParts.push(`${errored} failed`);
+  const summary = summaryParts.length > 0 ? ` (${summaryParts.join(', ')})` : '';
+
+  return (
+    <div className="rounded border border-border/60 bg-muted/20 text-xs">
+      <button
+        type="button"
+        onClick={() => setOpen((v) => !v)}
+        className="w-full flex items-center gap-1.5 px-2 py-1 hover:bg-muted/40 text-left"
+      >
+        <ChevronRight
+          className={`size-3 text-muted-foreground/60 shrink-0 transition-transform ${open ? 'rotate-90' : ''}`}
+        />
+        <span className="text-muted-foreground/60 select-none shrink-0">⊞</span>
+        <span className="font-mono text-foreground/90">
+          {count} {toolName} call{count === 1 ? '' : 's'}
+        </span>
+        {summary && (
+          <span className="text-muted-foreground truncate">{summary}</span>
+        )}
+        <span className="ml-auto text-muted-foreground/60 shrink-0">tap</span>
+      </button>
+      {open && (
+        <div className="border-t border-border/40 px-2 py-1 space-y-0.5">
+          {runs.map((run, i) => (
+            <ToolCallLine
+              key={`${run.call.id}-${i}`}
+              run={run}
+              insideGroup
+            />
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}

apps/web/src/components/ToolCallLine.tsx

@@ -0,0 +1,167 @@
+import { useState } from 'react';
+import type { ReactNode } from 'react';
+import { Check, ChevronRight, Loader2, X } from 'lucide-react';
+import type { ToolCall, ToolResult } from '@/api/types';
+import { sessionEvents } from '@/hooks/sessionEvents';
+
+// v1.8.2: cap on the inline arg-summary length. Expanded view shows full
+// args + full result, so this is purely a single-line render budget.
+const ARG_SUMMARY_MAX = 60;
+
+export interface ToolRun {
+  call: ToolCall;
+  // null while the call is in flight or the matching tool result hasn't
+  // arrived yet on the WS stream.
+  result: ToolResult | null;
+}
+
+function truncate(s: string, n: number): string {
+  return s.length > n ? s.slice(0, n - 1) + '…' : s;
+}
+
+// Per-tool argument summary mapping from the v1.8.2 spec. Goal is a single
+// scannable line that surfaces the *what* (path / pattern) without
+// overwhelming the chat with full JSON.
+export function formatToolArgs(name: string, args: Record<string, unknown>): string {
+  if (name === 'view_file') {
+    const path = String(args.path ?? '');
+    const start = args.start_line;
+    const end = args.end_line;
+    if (typeof start === 'number' && typeof end === 'number') {
+      return truncate(`${path}:${start}-${end}`, ARG_SUMMARY_MAX);
+    }
+    if (typeof start === 'number') {
+      return truncate(`${path}:${start}`, ARG_SUMMARY_MAX);
+    }
+    return truncate(path, ARG_SUMMARY_MAX);
+  }
+  if (name === 'list_dir') {
+    return truncate(String(args.path ?? '.'), ARG_SUMMARY_MAX);
+  }
+  if (name === 'grep') {
+    const pattern = String(args.pattern ?? '');
+    const path = args.path ? ` ${String(args.path)}` : '';
+    return truncate(`"${pattern}"${path}`, ARG_SUMMARY_MAX);
+  }
+  if (name === 'find_files') {
+    return truncate(String(args.pattern ?? ''), ARG_SUMMARY_MAX);
+  }
+  if (name === 'git_status') {
+    return '';
+  }
+  // Unknown tool — surface first arg value or the literal {} so the user can
+  // see something happened. Forward-compatible with future tools.
+  const keys = Object.keys(args);
+  if (keys.length === 0) return '{}';
+  const first = keys[0]!;
+  return truncate(`${first}: ${String(args[first])}`, ARG_SUMMARY_MAX);
+}
+
+export function runStatus(run: ToolRun): 'pending' | 'success' | 'error' {
+  if (run.result === null) return 'pending';
+  if (run.result.error) return 'error';
+  return 'success';
+}
+
+// Path-shaped paths in tool output text get a click handler so users can
+// jump to the file. Same heuristic as MessageBubble.linkifyPaths.
+const PATH_REGEX = /([a-zA-Z0-9._/-]+\.[a-zA-Z0-9]+)/g;
+function linkifyOutput(text: string): ReactNode[] {
+  const out: ReactNode[] = [];
+  let lastIdx = 0;
+  let idx = 0;
+  for (const match of text.matchAll(PATH_REGEX)) {
+    const matchedText = match[0];
+    const start = match.index ?? 0;
+    if (!matchedText.includes('/')) continue;
+    if (start > lastIdx) out.push(text.slice(lastIdx, start));
+    out.push(
+      <button
+        key={idx}
+        type="button"
+        onClick={() =>
+          sessionEvents.emit({ type: 'open_file_in_browser', path: matchedText })
+        }
+        className="text-primary underline cursor-pointer hover:text-primary/80"
+      >
+        {matchedText}
+      </button>
+    );
+    lastIdx = start + matchedText.length;
+    idx += 1;
+  }
+  if (lastIdx < text.length) out.push(text.slice(lastIdx));
+  return out.length > 0 ? out : [text];
+}
+
+interface Props {
+  run: ToolRun;
+  // When rendered inside a ToolCallGroup the line is already nested under a
+  // shared header, so the leading arrow is dropped to avoid double indent.
+  insideGroup?: boolean;
+}
+
+export function ToolCallLine({ run, insideGroup }: Props) {
+  const [open, setOpen] = useState(false);
+  const status = runStatus(run);
+  const args = run.call.args ?? {};
+  const summary = formatToolArgs(run.call.name, args);
+
+  return (
+    <div className="text-xs">
+      <button
+        type="button"
+        onClick={() => setOpen((v) => !v)}
+        className="flex items-center gap-1.5 w-full text-left hover:bg-muted/40 rounded px-1 py-0.5 -mx-1"
+      >
+        {!insideGroup && (
+          <span className="text-muted-foreground/60 select-none shrink-0">↳</span>
+        )}
+        <ChevronRight
+          className={`size-3 text-muted-foreground/60 shrink-0 transition-transform ${open ? 'rotate-90' : ''}`}
+        />
+        <span className="font-mono text-foreground/90 shrink-0">{run.call.name}</span>
+        {summary && (
+          <span className="font-mono text-muted-foreground truncate min-w-0 flex-1">
+            {summary}
+          </span>
+        )}
+        {!summary && <span className="flex-1" />}
+        <span className="shrink-0 ml-1">
+          {status === 'pending' && (
+            <Loader2 className="size-3 text-muted-foreground animate-spin" aria-label="running" />
+          )}
+          {status === 'success' && (
+            <Check className="size-3 text-emerald-500" aria-label="success" />
+          )}
+          {status === 'error' && (
+            <X className="size-3 text-destructive" aria-label="error" />
+          )}
+        </span>
+      </button>
+      {open && (
+        <div className="ml-5 mt-1 mb-1 space-y-1">
+          <pre className="text-[10px] text-muted-foreground font-mono whitespace-pre-wrap break-all bg-muted/30 rounded px-2 py-1">
+            {JSON.stringify(args, null, 2)}
+          </pre>
+          {run.result && (
+            <pre className="text-[11px] font-mono whitespace-pre-wrap bg-muted/30 rounded px-2 py-1 max-h-72 overflow-y-auto">
+              {run.result.error ? (
+                <span className="text-destructive">{run.result.error}</span>
+              ) : (
+                linkifyOutput(
+                  typeof run.result.output === 'string'
+                    ? run.result.output
+                    : JSON.stringify(run.result.output, null, 2)
+                )
+              )}
+              {run.result.truncated && (
+                <div className="text-muted-foreground/60 mt-1">— output truncated —</div>
+              )}
+            </pre>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}

apps/web/src/components/Workspace.tsx

@@ -1,8 +1,8 @@
-import { useCallback } from 'react';
 import { PanelRight, MessageSquare, Terminal, Bot } from 'lucide-react';
 import type { Chat, WorkspacePane } from '@/api/types';
-import { useWorkspacePanes, MAX_PANES } from '@/hooks/useWorkspacePanes';
-import { useSessionChats } from '@/hooks/useSessionChats';
+import { MAX_PANES, type UseWorkspacePanesResult } from '@/hooks/useWorkspacePanes';
+import type { UseSessionChatsResult } from '@/hooks/useSessionChats';
+import { useViewport } from '@/hooks/useViewport';
 import { ChatPane } from '@/components/panes/ChatPane';
 import { ChatTabBar } from '@/components/ChatTabBar';
 import { SessionLandingPage } from '@/components/SessionLandingPage';
@@ -17,14 +17,27 @@ import { cn } from '@/lib/utils';
 interface Props {
   sessionId: string;
   projectId: string;
+  // Batch 9: threaded down to ChatPane → ChatInput → AgentPicker.
+  agentId?: string | null;
+  onAgentChange?: (agentId: string | null) => void | Promise<void>;
+  // v1.8: panes + chats hoisted into Session.tsx so the mobile header pill
+  // (MobileTabSwitcher) can share state with the pane grid.
+  panesHook: UseWorkspacePanesResult;
+  chatsHook: UseSessionChatsResult;
 }
 
-export function Workspace({ sessionId, projectId }: Props) {
+export function Workspace({
+  sessionId,
+  projectId,
+  agentId,
+  onAgentChange,
+  panesHook,
+  chatsHook,
+}: Props) {
   const {
     panes,
     activePaneIdx,
     setActivePaneIdx,
-    activePaneIdxRef,
     openChatInPane,
     switchTab,
     removeTab,
@@ -34,8 +47,6 @@ export function Workspace({ sessionId, projectId }: Props) {
     showLandingPage,
     addSplitPane,
     removePane,
-    removeChatFromPanes,
-    initializeFirstChatIfEmpty,
     handlePaneDragStart,
     handlePaneDragOver,
     handlePaneDragLeave,
@@ -43,15 +54,7 @@ export function Workspace({ sessionId, projectId }: Props) {
     handlePaneDragEnd,
     dragOverIdx,
     draggingIdxRef,
-  } = useWorkspacePanes(sessionId);
-
-  // Thin wrapper so useSessionChats can route open_chat_in_active_pane events
-  // without knowing about pane indexing.
-  const openChatInActivePane = useCallback(
-    (chatId: string) => openChatInPane(activePaneIdxRef.current, chatId),
-    [openChatInPane, activePaneIdxRef],
-  );
-
+  } = panesHook;
   const {
     chats,
     createChat,
@@ -60,12 +63,9 @@ export function Workspace({ sessionId, projectId }: Props) {
     deleteChat,
     renameChat,
     handleLandingSend,
-  } = useSessionChats(sessionId, {
-    removeChatFromPanes,
-    openChatInPane,
-    openChatInActivePane,
-    initializeFirstChatIfEmpty,
-  });
+  } = chatsHook;
+
+  const { isMobile } = useViewport();
 
   function chatsForPane(pane: WorkspacePane): Chat[] {
     return pane.chatIds
@@ -75,78 +75,101 @@ export function Workspace({ sessionId, projectId }: Props) {
 
   return (
     <div className="flex flex-col h-full min-h-0">
-      <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"
-              disabled={panes.length >= MAX_PANES}
-              className={cn(
-                'flex items-center gap-1 text-xs px-2 py-1 rounded hover:bg-muted',
-                panes.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('agent')}>
-              <Bot size={14} /> Agent
-            </DropdownMenuItem>
-          </DropdownMenuContent>
-        </DropdownMenu>
-      </div>
+      {!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"
+                disabled={panes.length >= MAX_PANES}
+                className={cn(
+                  'flex items-center gap-1 text-xs px-2 py-1 rounded hover:bg-muted',
+                  panes.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('agent')}>
+                <Bot size={14} /> Agent
+              </DropdownMenuItem>
+            </DropdownMenuContent>
+          </DropdownMenu>
+        </div>
+      )}
+
+      {/* v1.8: mobile multi-pane SwipeablePaneTab strip removed; the header
+          pill (MobileTabSwitcher) is the mobile pane switcher. */}
 
       <div
-        className="flex-1 grid min-h-0"
-        style={{
-          gridTemplateColumns: `repeat(${panes.length}, minmax(0, 1fr))`,
-        }}
+        className={cn('flex-1 min-h-0', isMobile ? 'flex' : 'grid')}
+        style={
+          isMobile
+            ? undefined
+            : { gridTemplateColumns: `repeat(${panes.length}, minmax(0, 1fr))` }
+        }
       >
-        {panes.map((pane, idx) => (
+        {panes.map((pane, idx) => {
+          const visible = !isMobile || idx === activePaneIdx;
+          if (!visible) return null;
+          return (
           <div
             key={pane.id}
             className={cn(
               'flex flex-col h-full min-h-0 border-r border-border last:border-r-0 relative',
-              idx === activePaneIdx && 'ring-1 ring-inset ring-ring/20',
-              dragOverIdx === idx && draggingIdxRef.current !== idx &&
+              isMobile ? 'flex-1 w-full' : undefined,
+              !isMobile && idx === activePaneIdx && 'ring-1 ring-inset ring-ring/20',
+              !isMobile && dragOverIdx === idx && draggingIdxRef.current !== idx &&
                 'before:absolute before:inset-y-0 before:left-0 before:w-0.5 before:bg-primary before:z-10'
             )}
             onClick={() => setActivePaneIdx(idx)}
-            onDragOver={panes.length > 1 ? handlePaneDragOver(idx) : undefined}
-            onDragLeave={panes.length > 1 ? handlePaneDragLeave : undefined}
-            onDrop={panes.length > 1 ? handlePaneDrop(idx) : undefined}
+            onDragOver={!isMobile && panes.length > 1 ? handlePaneDragOver(idx) : undefined}
+            onDragLeave={!isMobile && panes.length > 1 ? handlePaneDragLeave : undefined}
+            onDrop={!isMobile && panes.length > 1 ? handlePaneDrop(idx) : undefined}
           >
             <div
-              draggable={panes.length > 1}
-              onDragStart={panes.length > 1 ? handlePaneDragStart(idx) : undefined}
-              onDragEnd={panes.length > 1 ? handlePaneDragEnd : undefined}
+              draggable={!isMobile && panes.length > 1}
+              onDragStart={!isMobile && panes.length > 1 ? handlePaneDragStart(idx) : undefined}
+              onDragEnd={!isMobile && panes.length > 1 ? handlePaneDragEnd : undefined}
             >
-              <ChatTabBar
-                pane={pane}
-                tabs={chatsForPane(pane)}
-                onSwitchTab={(tabIdx) => switchTab(idx, tabIdx)}
-                onRemoveTab={(chatId) => removeTab(idx, chatId)}
-                onCloseOthers={(chatId) => closeOtherTabs(idx, chatId)}
-                onCloseToRight={(chatId) => closeTabsToRight(idx, chatId)}
-                onCloseAll={() => closeAllTabs(idx)}
-                onNewChat={() => void createChat(idx)}
-                onShowHistory={() => showLandingPage(idx)}
-                onRename={renameChat}
-                onRemovePane={panes.length > 1 ? () => removePane(idx) : undefined}
-              />
+              {/* Hidden on mobile per v1.8: chat-within-pane navigation
+                  is not exposed on small screens; users switch panes via
+                  the header pill instead. */}
+              {!isMobile && (
+                <ChatTabBar
+                  pane={pane}
+                  tabs={chatsForPane(pane)}
+                  onSwitchTab={(tabIdx) => switchTab(idx, tabIdx)}
+                  onRemoveTab={(chatId) => removeTab(idx, chatId)}
+                  onCloseOthers={(chatId) => closeOtherTabs(idx, chatId)}
+                  onCloseToRight={(chatId) => closeTabsToRight(idx, chatId)}
+                  onCloseAll={() => closeAllTabs(idx)}
+                  onNewChat={() => void createChat(idx)}
+                  onShowHistory={() => showLandingPage(idx)}
+                  onRename={renameChat}
+                  onRemovePane={panes.length > 1 ? () => removePane(idx) : undefined}
+                />
+              )}
             </div>
 
             <div className="flex-1 min-h-0 overflow-hidden">
               {pane.kind === 'chat' && pane.chatId ? (
-                <ChatPane sessionId={sessionId} chatId={pane.chatId} projectId={projectId} sessionChats={chats} />
+                <ChatPane
+                  sessionId={sessionId}
+                  chatId={pane.chatId}
+                  projectId={projectId}
+                  agentId={agentId}
+                  onAgentChange={onAgentChange}
+                  sessionChats={chats}
+                />
               ) : (
                 <SessionLandingPage
                   sessionId={sessionId}
@@ -165,7 +188,8 @@ export function Workspace({ sessionId, projectId }: Props) {
               )}
             </div>
           </div>
-        ))}
+          );
+        })}
       </div>
     </div>
   );

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

@@ -18,10 +18,13 @@ interface Props {
   sessionId: string;
   chatId: string;
   projectId: string;
+  // Batch 9: optional, threaded down to ChatInput's agent picker.
+  agentId?: string | null;
+  onAgentChange?: (agentId: string | null) => void | Promise<void>;
   sessionChats?: import('@/api/types').Chat[];
 }
 
-export function ChatPane({ sessionId, chatId, projectId, sessionChats }: Props) {
+export function ChatPane({ sessionId, chatId, projectId, agentId, onAgentChange, sessionChats }: Props) {
   const stream = useSessionStream(sessionId);
   const lastErrorRef = useRef<string | null>(null);
   const [queue, setQueue] = useState<string[]>([]);
@@ -120,7 +123,7 @@ export function ChatPane({ sessionId, chatId, projectId, sessionChats }: Props)
                 <DropdownMenuTrigger asChild>
                   <button
                     type="button"
-                    className="p-0.5 hover:bg-muted rounded shrink-0"
+                    className="inline-flex items-center justify-center p-0.5 hover:bg-muted rounded shrink-0 max-md:min-h-[44px] max-md:min-w-[44px]"
                     aria-label="Queued message options"
                   >
                     <ChevronDown size={12} />
@@ -138,7 +141,7 @@ export function ChatPane({ sessionId, chatId, projectId, sessionChats }: Props)
               <button
                 type="button"
                 onClick={() => removeQueued(i)}
-                className="p-0.5 hover:bg-muted rounded shrink-0"
+                className="inline-flex items-center justify-center p-0.5 hover:bg-muted rounded shrink-0 max-md:min-h-[44px] max-md:min-w-[44px]"
                 aria-label="Cancel queued message"
               >
                 <X size={12} />
@@ -156,7 +159,7 @@ export function ChatPane({ sessionId, chatId, projectId, sessionChats }: Props)
           <button
             type="button"
             onClick={() => void handleStop()}
-            className="flex items-center gap-1.5 text-xs px-3 py-1 rounded-full border hover:bg-muted text-muted-foreground hover:text-foreground"
+            className="flex items-center gap-1.5 text-xs px-3 py-1 rounded-full border hover:bg-muted text-muted-foreground hover:text-foreground max-md:min-h-[44px] max-md:px-5"
           >
             <Square size={10} className="fill-current" />
             Stop generating
@@ -167,7 +170,14 @@ export function ChatPane({ sessionId, chatId, projectId, sessionChats }: Props)
 
       <div className="relative">
         <ChatContextPopover stats={contextStats} />
-        <ChatInput disabled={false} projectId={projectId} onSend={handleSend} onForceSend={streaming ? handleForceSend : undefined} />
+        <ChatInput
+          disabled={false}
+          projectId={projectId}
+          agentId={agentId}
+          onAgentChange={onAgentChange}
+          onSend={handleSend}
+          onForceSend={streaming ? handleForceSend : undefined}
+        />
       </div>
     </div>
   );

apps/web/src/hooks/sessionEvents.ts

@@ -2,7 +2,7 @@
 // across hooks (e.g. AI rename arriving via WS in the session view needs to
 // also refresh the sidebar's session list).
 
-import type { Chat, Project, Session } from '@/api/types';
+import type { Chat, ErrorReason, Project, Session } from '@/api/types';
 import type { Attachment } from '@/lib/attachments';
 
 export interface SessionRenamedEvent {
@@ -115,6 +115,19 @@ export interface ProjectUpdatedEvent {
   name: string;
 }
 
+// v1.8 mobile-tabs: broadcast on user channel from inference.ts so any device
+// subscribed sees a chat working/idle/error. Frontend stores per-chat; panes
+// derive their dot from pane.activeChatId.
+// v1.8.2: optional `reason` carries a machine-readable code when status is
+// 'error'. UI prefers reason for inline error rendering.
+export interface ChatStatusEvent {
+  type: 'chat_status';
+  chat_id: string;
+  status: 'working' | 'idle' | 'error';
+  at: string;
+  reason?: ErrorReason;
+}
+
 export type SessionEvent =
   | SessionRenamedEvent
   | ProjectCreatedEvent
@@ -134,7 +147,8 @@ export type SessionEvent =
   | ChatDeletedEvent
   | ProjectArchivedEvent
   | ProjectUnarchivedEvent
-  | ProjectUpdatedEvent;
+  | ProjectUpdatedEvent
+  | ChatStatusEvent;
 type Listener = (event: SessionEvent) => void;
 
 const listeners = new Set<Listener>();

apps/web/src/hooks/useChatStatus.ts

@@ -0,0 +1,71 @@
+import { useEffect, useState } from 'react';
+import { sessionEvents } from './sessionEvents';
+
+export type RawStatus = 'working' | 'idle' | 'error';
+export type DerivedStatus = 'working' | 'idle_warm' | 'idle_cold' | 'error';
+
+// Window during which an idle dot stays green; after this, it fades to gray.
+const WARM_WINDOW_MS = 30_000;
+const TICK_MS = 5_000;
+
+interface Entry {
+  status: RawStatus;
+  at: string;
+}
+
+// Module-scope shared state so every StatusDot in the app shares one map
+// (mirrors useSidebar's singleton pattern). The map is ephemeral — cleared on
+// page reload; WS reconnect repopulates as new frames arrive.
+const statuses = new Map<string, Entry>();
+const subscribers = new Set<() => void>();
+
+function notify(): void {
+  for (const s of subscribers) {
+    try { s(); } catch { /* swallow */ }
+  }
+}
+
+// Guard against duplicate listeners during Vite HMR.
+const G = globalThis as Record<string, unknown>;
+if (!G.__boocode_chat_status_subscribed) {
+  G.__boocode_chat_status_subscribed = true;
+  sessionEvents.subscribe((ev) => {
+    if (ev.type !== 'chat_status') return;
+    statuses.set(ev.chat_id, { status: ev.status, at: ev.at });
+    notify();
+  });
+  // Single shared ticker: re-notify so any green dot whose 30s window just
+  // expired re-renders as gray. We only notify if there's something warm —
+  // avoids waking sleeping components for nothing.
+  setInterval(() => {
+    const now = Date.now();
+    for (const entry of statuses.values()) {
+      if (entry.status === 'idle') {
+        const age = now - new Date(entry.at).getTime();
+        if (age < WARM_WINDOW_MS + TICK_MS) {
+          notify();
+          return;
+        }
+      }
+    }
+  }, TICK_MS);
+}
+
+function derive(entry: Entry | undefined): DerivedStatus {
+  if (!entry) return 'idle_cold';
+  if (entry.status === 'working') return 'working';
+  if (entry.status === 'error') return 'error';
+  const age = Date.now() - new Date(entry.at).getTime();
+  return age < WARM_WINDOW_MS ? 'idle_warm' : 'idle_cold';
+}
+
+export function useChatStatus(chatId: string | null | undefined): DerivedStatus {
+  const [, force] = useState({});
+  useEffect(() => {
+    const sub = () => force({});
+    subscribers.add(sub);
+    return () => { subscribers.delete(sub); };
+  }, []);
+  if (!chatId) return 'idle_cold';
+  return derive(statuses.get(chatId));
+}

apps/web/src/hooks/useLongPress.ts

@@ -0,0 +1,75 @@
+import { useCallback, useRef } from 'react';
+import type { TouchEvent } from 'react';
+
+interface LongPressHandlers {
+  onTouchStart: (e: TouchEvent) => void;
+  onTouchMove: (e: TouchEvent) => void;
+  onTouchEnd: (e: TouchEvent) => void;
+  onTouchCancel: (e: TouchEvent) => void;
+}
+
+interface Options {
+  ms?: number;
+  // Suppress the synthetic click that follows touchend when long-press fired.
+  suppressClickOnFire?: boolean;
+}
+
+// Hand-rolled long-press detector. Starts a timer on touchstart; cancels on
+// touchmove or early touchend; fires the callback on timer expiry. Caller is
+// expected to suppress text-selection callout via CSS (-webkit-touch-callout).
+export function useLongPress(
+  callback: (touch: { clientX: number; clientY: number; target: EventTarget | null }) => void,
+  { ms = 500, suppressClickOnFire = true }: Options = {},
+): LongPressHandlers {
+  const timerRef = useRef<number | null>(null);
+  const firedRef = useRef(false);
+
+  const clear = useCallback(() => {
+    if (timerRef.current !== null) {
+      window.clearTimeout(timerRef.current);
+      timerRef.current = null;
+    }
+  }, []);
+
+  const onTouchStart = useCallback(
+    (e: TouchEvent) => {
+      firedRef.current = false;
+      const touch = e.touches[0];
+      if (!touch) return;
+      const x = touch.clientX;
+      const y = touch.clientY;
+      const target = e.target;
+      clear();
+      timerRef.current = window.setTimeout(() => {
+        firedRef.current = true;
+        callback({ clientX: x, clientY: y, target });
+      }, ms);
+    },
+    [callback, ms, clear],
+  );
+
+  const onTouchMove = useCallback(() => {
+    clear();
+  }, [clear]);
+
+  const onTouchEnd = useCallback(
+    (e: TouchEvent) => {
+      clear();
+      if (firedRef.current && suppressClickOnFire) {
+        // Block the synthetic click that follows touchend; the long-press
+        // already handled the gesture.
+        e.preventDefault();
+      }
+    },
+    [clear, suppressClickOnFire],
+  );
+
+  const onTouchCancel = useCallback(
+    (_e: TouchEvent) => {
+      clear();
+    },
+    [clear],
+  );
+
+  return { onTouchStart, onTouchMove, onTouchEnd, onTouchCancel };
+}

apps/web/src/hooks/useProjectGit.ts

@@ -0,0 +1,41 @@
+import { useEffect, useState } from 'react';
+import { api } from '@/api/client';
+import type { GitMeta } from '@/api/types';
+
+const POLL_INTERVAL_MS = 30_000;
+
+// Live-ish git meta for the project header indicator. Backed by the server's
+// 30s cache, so a 30s client poll plus the cache TTL bounds total staleness
+// to ~60s in the worst case. Returns null while the first fetch is in flight
+// or if the request failed.
+export function useProjectGit(projectId: string | null | undefined): GitMeta | null {
+  const [meta, setMeta] = useState<GitMeta | null>(null);
+
+  useEffect(() => {
+    if (!projectId) {
+      setMeta(null);
+      return;
+    }
+    let cancelled = false;
+
+    const fetchOnce = () => {
+      api.projects
+        .git(projectId)
+        .then((m) => {
+          if (!cancelled) setMeta(m);
+        })
+        .catch(() => {
+          if (!cancelled) setMeta(null);
+        });
+    };
+
+    fetchOnce();
+    const t = setInterval(fetchOnce, POLL_INTERVAL_MS);
+    return () => {
+      cancelled = true;
+      clearInterval(t);
+    };
+  }, [projectId]);
+
+  return meta;
+}

apps/web/src/hooks/usePullToRefresh.ts

@@ -0,0 +1,77 @@
+import { useCallback, useRef, useState } from 'react';
+import type { TouchEvent } from 'react';
+
+interface Options {
+  threshold?: number;
+  enabled?: boolean;
+  maxPull?: number;
+}
+
+interface Handlers {
+  onTouchStart: (e: TouchEvent<HTMLElement>) => void;
+  onTouchMove: (e: TouchEvent<HTMLElement>) => void;
+  onTouchEnd: () => void;
+  pullDist: number;
+  refreshing: boolean;
+}
+
+// Hand-rolled pull-to-refresh: records the initial Y on touchstart only if
+// the target is scrolled to the top, then tracks downward pull on touchmove.
+// On touchend, fires onRefresh if the pull exceeded the threshold.
+export function usePullToRefresh(
+  onRefresh: () => void | Promise<void>,
+  { threshold = 80, enabled = true, maxPull = 120 }: Options = {},
+): Handlers {
+  const [pullDist, setPullDist] = useState(0);
+  const [refreshing, setRefreshing] = useState(false);
+  const startYRef = useRef<number | null>(null);
+
+  const onTouchStart = useCallback(
+    (e: TouchEvent<HTMLElement>) => {
+      if (!enabled || refreshing) return;
+      const target = e.currentTarget as HTMLElement;
+      if (target.scrollTop > 0) return;
+      const t = e.touches[0];
+      if (!t) return;
+      startYRef.current = t.clientY;
+    },
+    [enabled, refreshing],
+  );
+
+  const onTouchMove = useCallback(
+    (e: TouchEvent<HTMLElement>) => {
+      if (!enabled || refreshing || startYRef.current === null) return;
+      const t = e.touches[0];
+      if (!t) return;
+      const delta = t.clientY - startYRef.current;
+      if (delta > 0) {
+        setPullDist(Math.min(delta, maxPull));
+      } else {
+        setPullDist(0);
+      }
+    },
+    [enabled, refreshing, maxPull],
+  );
+
+  const onTouchEnd = useCallback(() => {
+    if (!enabled || refreshing) {
+      startYRef.current = null;
+      setPullDist(0);
+      return;
+    }
+    const fired = pullDist >= threshold && startYRef.current !== null;
+    startYRef.current = null;
+    setPullDist(0);
+    if (fired) {
+      setRefreshing(true);
+      Promise.resolve(onRefresh())
+        .catch(() => {})
+        .finally(() => {
+          // Hold the indicator briefly so the action feels intentional.
+          window.setTimeout(() => setRefreshing(false), 600);
+        });
+    }
+  }, [enabled, refreshing, pullDist, threshold, onRefresh]);
+
+  return { onTouchStart, onTouchMove, onTouchEnd, pullDist, refreshing };
+}

apps/web/src/hooks/useRightRailDrawer.tsx

@@ -0,0 +1,35 @@
+import { createContext, useCallback, useContext, useEffect, useState } from 'react';
+import type { ReactNode } from 'react';
+import { useLocation } from 'react-router-dom';
+
+interface RightRailDrawerState {
+  open: boolean;
+  setOpen: (open: boolean) => void;
+  toggle: () => void;
+}
+
+const Ctx = createContext<RightRailDrawerState | null>(null);
+
+export function RightRailDrawerProvider({ children }: { children: ReactNode }) {
+  const [open, setOpen] = useState(false);
+  const location = useLocation();
+
+  // Auto-close on route change. Same pattern as useSidebarDrawer — keeps the
+  // drawer from leaking between sessions when the user navigates.
+  useEffect(() => {
+    setOpen(false);
+  }, [location.pathname]);
+
+  const toggle = useCallback(() => setOpen((v) => !v), []);
+
+  return <Ctx.Provider value={{ open, setOpen, toggle }}>{children}</Ctx.Provider>;
+}
+
+export function useRightRailDrawer(): RightRailDrawerState {
+  const ctx = useContext(Ctx);
+  if (!ctx) {
+    // Soft fallback so consumers don't crash if rendered outside a provider.
+    return { open: false, setOpen: () => {}, toggle: () => {} };
+  }
+  return ctx;
+}

apps/web/src/hooks/useSessionStream.ts

@@ -29,7 +29,9 @@ function applyFrame(state: State, frame: WsFrame): State {
         kind: 'message',
         tool_calls: null,
         tool_results: null,
-        status: 'streaming',
+        // v1.8.2: cap-hit sentinels arrive role='system' and are static, so
+        // skipping the streaming dot for them keeps the UI accurate.
+        status: frame.role === 'system' ? 'complete' : 'streaming',
         last_seq: 0,
         tokens_used: null,
         ctx_used: null,
@@ -37,6 +39,7 @@ function applyFrame(state: State, frame: WsFrame): State {
         started_at: null,
         finished_at: null,
         created_at: new Date().toISOString(),
+        metadata: null,
       };
       return { ...state, messages: [...state.messages, newMsg] };
     }
@@ -96,6 +99,7 @@ function applyFrame(state: State, frame: WsFrame): State {
         started_at: null,
         finished_at: null,
         created_at: new Date().toISOString(),
+        metadata: null,
       };
       return { ...state, messages: [...state.messages, newMsg] };
     }
@@ -110,6 +114,10 @@ function applyFrame(state: State, frame: WsFrame): State {
               ...(frame.ctx_max !== undefined ? { ctx_max: frame.ctx_max } : {}),
               ...(frame.started_at !== undefined ? { started_at: frame.started_at } : {}),
               ...(frame.finished_at !== undefined ? { finished_at: frame.finished_at } : {}),
+              // v1.8.2: cap-hit sentinels (and future stamped metadata) ride
+              // in on this terminal frame so the reducer can attach it
+              // without waiting for a refetch.
+              ...(frame.metadata !== undefined ? { metadata: frame.metadata } : {}),
             }
           : m
       );
@@ -133,9 +141,22 @@ function applyFrame(state: State, frame: WsFrame): State {
       return state;
     }
     case 'error': {
+      // v1.8.2: when the frame carries a structured reason, stamp it onto the
+      // failed message's metadata so the bubble can render specifics inline
+      // (the WS error frame is one-shot; refresh-safe rendering needs the
+      // value persisted on the message).
+      const errorMeta = frame.reason
+        ? { kind: 'error' as const, error_reason: frame.reason, error_text: frame.error }
+        : null;
       const next = frame.message_id
         ? state.messages.map((m) =>
-            m.id === frame.message_id ? { ...m, status: 'failed' as const } : m
+            m.id === frame.message_id
+              ? {
+                  ...m,
+                  status: 'failed' as const,
+                  ...(errorMeta ? { metadata: errorMeta } : {}),
+                }
+              : m
           )
         : state.messages;
       return { ...state, messages: next, error: frame.error };
@@ -143,6 +164,11 @@ function applyFrame(state: State, frame: WsFrame): State {
   }
 }
 
+// Matches useUserEvents — exponential backoff with the same ceiling so the
+// two channels reconnect on the same cadence after a network handoff.
+const RECONNECT_INITIAL_MS = 1000;
+const RECONNECT_MAX_MS = 30_000;
+
 export function useSessionStream(sessionId: string | undefined) {
   const [state, setState] = useState<State>({ messages: [], connected: false, error: null });
   const wsRef = useRef<WebSocket | null>(null);
@@ -152,32 +178,52 @@ export function useSessionStream(sessionId: string | undefined) {
 
     setState({ messages: [], connected: false, error: null });
 
-    const proto = window.location.protocol === 'https:' ? 'wss' : 'ws';
-    const url = `${proto}://${window.location.host}/api/ws/sessions/${sessionId}`;
-    const ws = new WebSocket(url);
-    wsRef.current = ws;
+    let unmounted = false;
+    let reconnectTimer: ReturnType<typeof setTimeout> | null = null;
+    let reconnectDelay = RECONNECT_INITIAL_MS;
 
-    ws.onopen = () => {
-      setState((s) => ({ ...s, connected: true, error: null }));
-    };
-    ws.onmessage = (ev) => {
-      try {
-        const frame = JSON.parse(typeof ev.data === 'string' ? ev.data : '') as WsFrame;
-        setState((s) => applyFrame(s, frame));
-      } catch (err) {
-        console.warn('bad ws frame', err);
-      }
-    };
-    ws.onerror = () => {
-      setState((s) => ({ ...s, error: 'websocket error' }));
-    };
-    ws.onclose = () => {
-      setState((s) => ({ ...s, connected: false }));
+    const connect = () => {
+      if (unmounted) return;
+      const proto = window.location.protocol === 'https:' ? 'wss' : 'ws';
+      const url = `${proto}://${window.location.host}/api/ws/sessions/${sessionId}`;
+      const ws = new WebSocket(url);
+      wsRef.current = ws;
+
+      ws.onopen = () => {
+        reconnectDelay = RECONNECT_INITIAL_MS;
+        setState((s) => ({ ...s, connected: true, error: null }));
+      };
+      ws.onmessage = (ev) => {
+        try {
+          const frame = JSON.parse(typeof ev.data === 'string' ? ev.data : '') as WsFrame;
+          setState((s) => applyFrame(s, frame));
+        } catch (err) {
+          console.warn('bad ws frame', err);
+        }
+      };
+      // v1.8.1: WS errors no longer surface as user-facing toasts here. The
+      // user-channel hook (useUserEvents) owns the debounced "reconnecting…"
+      // UI; this channel just reconnects silently on the same backoff.
+      ws.onerror = () => {
+        try { ws.close(); } catch {}
+      };
+      ws.onclose = () => {
+        if (unmounted) return;
+        setState((s) => ({ ...s, connected: false }));
+        const delay = reconnectDelay;
+        reconnectDelay = Math.min(reconnectDelay * 2, RECONNECT_MAX_MS);
+        reconnectTimer = setTimeout(connect, delay);
+      };
     };
 
+    connect();
+
     return () => {
+      unmounted = true;
+      if (reconnectTimer) clearTimeout(reconnectTimer);
+      const ws = wsRef.current;
       wsRef.current = null;
-      ws.close();
+      if (ws) try { ws.close(); } catch {}
     };
   }, [sessionId]);
 

apps/web/src/hooks/useSidebar.ts

@@ -171,6 +171,7 @@ function applyEvent(prev: SidebarResponse, event: import('./sessionEvents').Sess
     case 'chat_archived':
     case 'chat_unarchived':
     case 'chat_deleted':
+    case 'chat_status':
       return prev;
     case 'project_archived': {
       const next = prev.projects.filter((p) => p.id !== event.project_id);

apps/web/src/hooks/useSidebarDrawer.tsx

@@ -0,0 +1,36 @@
+import { createContext, useCallback, useContext, useEffect, useState } from 'react';
+import type { ReactNode } from 'react';
+import { useLocation } from 'react-router-dom';
+
+interface SidebarDrawerState {
+  open: boolean;
+  setOpen: (open: boolean) => void;
+  toggle: () => void;
+}
+
+const Ctx = createContext<SidebarDrawerState | null>(null);
+
+export function SidebarDrawerProvider({ children }: { children: ReactNode }) {
+  const [open, setOpen] = useState(false);
+  const location = useLocation();
+
+  // Auto-close on navigation. Effect fires once on mount too (open default
+  // is false, so no observable effect) and on every pathname change after.
+  useEffect(() => {
+    setOpen(false);
+  }, [location.pathname]);
+
+  const toggle = useCallback(() => setOpen((v) => !v), []);
+
+  return <Ctx.Provider value={{ open, setOpen, toggle }}>{children}</Ctx.Provider>;
+}
+
+export function useSidebarDrawer(): SidebarDrawerState {
+  const ctx = useContext(Ctx);
+  if (!ctx) {
+    // Soft fallback so consumers don't crash if rendered outside a provider.
+    // In practice all top-level routes are inside the provider.
+    return { open: false, setOpen: () => {}, toggle: () => {} };
+  }
+  return ctx;
+}

apps/web/src/hooks/useUserEvents.ts

@@ -1,5 +1,6 @@
 import { useEffect } from 'react';
 import { sessionEvents } from './sessionEvents';
+import { createWsReconnectToast } from './wsReconnectToast';
 
 const RECONNECT_INITIAL_MS = 1000;
 const RECONNECT_MAX_MS = 30000;
@@ -11,6 +12,20 @@ export function useUserEvents(): void {
     let reconnectDelay = RECONNECT_INITIAL_MS;
     let unmounted = false;
 
+    // v1.8.1: silent on the first disconnect; gray "reconnecting…" after 3
+    // fails / 15 s; red "connection lost" with a Retry Now action after 60 s.
+    const reconnectToast = createWsReconnectToast({
+      label: 'Live updates',
+      onRetryNow: () => {
+        if (reconnectTimer) {
+          clearTimeout(reconnectTimer);
+          reconnectTimer = null;
+          reconnectDelay = RECONNECT_INITIAL_MS;
+          connect();
+        }
+      },
+    });
+
     const connect = () => {
       if (unmounted) return;
       const url = new URL('/api/ws/user', window.location.href);
@@ -19,6 +34,7 @@ export function useUserEvents(): void {
 
       ws.onopen = () => {
         reconnectDelay = RECONNECT_INITIAL_MS;
+        reconnectToast.onConnected();
       };
 
       ws.onmessage = (ev) => {
@@ -34,6 +50,7 @@ export function useUserEvents(): void {
 
       ws.onclose = () => {
         if (unmounted) return;
+        reconnectToast.onFailure();
         const delay = reconnectDelay;
         reconnectDelay = Math.min(reconnectDelay * 2, RECONNECT_MAX_MS);
         reconnectTimer = setTimeout(connect, delay);
@@ -50,8 +67,8 @@ export function useUserEvents(): void {
 
     return () => {
       unmounted = true;
+      reconnectToast.dispose();
       if (reconnectTimer) clearTimeout(reconnectTimer);
-      // best-effort cleanup; ignore failure because the socket may already be closed
       if (ws) try { ws.close(); } catch {}
     };
   }, []);

apps/web/src/hooks/useViewport.ts

@@ -0,0 +1,45 @@
+import { useEffect, useState } from 'react';
+
+// Breakpoints (px): mobile <768, tablet 768-1023, desktop >=1024.
+const MOBILE_MAX = 767;
+const TABLET_MAX = 1023;
+
+export interface ViewportSnapshot {
+  isMobile: boolean;
+  isTablet: boolean;
+  width: number;
+}
+
+function snapshot(): ViewportSnapshot {
+  if (typeof window === 'undefined') {
+    return { isMobile: false, isTablet: false, width: 1280 };
+  }
+  const width = window.innerWidth;
+  return {
+    isMobile: width <= MOBILE_MAX,
+    isTablet: width > MOBILE_MAX && width <= TABLET_MAX,
+    width,
+  };
+}
+
+// matchMedia-based, no resize polling. We listen to two breakpoint queries
+// and recompute the snapshot on any change.
+export function useViewport(): ViewportSnapshot {
+  const [state, setState] = useState<ViewportSnapshot>(snapshot);
+
+  useEffect(() => {
+    if (typeof window === 'undefined') return;
+    const mobileMq = window.matchMedia(`(max-width: ${MOBILE_MAX}px)`);
+    const tabletMq = window.matchMedia(`(min-width: ${MOBILE_MAX + 1}px) and (max-width: ${TABLET_MAX}px)`);
+    const update = () => setState(snapshot());
+    mobileMq.addEventListener('change', update);
+    tabletMq.addEventListener('change', update);
+    update();
+    return () => {
+      mobileMq.removeEventListener('change', update);
+      tabletMq.removeEventListener('change', update);
+    };
+  }, []);
+
+  return state;
+}

apps/web/src/hooks/wsReconnectToast.ts

@@ -0,0 +1,95 @@
+import { toast } from 'sonner';
+
+// v1.8.1 thresholds. First disconnect is silent — mobile Authelia idle timeouts
+// and tab suspensions trip reconnects constantly and the old red "websocket
+// error" toast made the app feel broken. Only escalate once the failure is
+// sustained.
+const TOAST_AFTER_FAILS = 3;
+const TOAST_AFTER_MS = 15_000;
+const PERSISTENT_AFTER_MS = 60_000;
+
+export interface WsReconnectToast {
+  onFailure(): void;
+  onConnected(): void;
+  dispose(): void;
+}
+
+interface Options {
+  label: string;            // shown in the toast (e.g. "Live updates")
+  onRetryNow: () => void;   // user clicked the "Retry now" action
+}
+
+// Per-connection toast wrapper. Caller drives it from the WS lifecycle:
+//   onFailure   — after each failed connection attempt
+//   onConnected — after a successful onopen
+//   dispose     — on hook unmount
+// The wrapper itself runs no timers and does not change the caller's reconnect
+// cadence; it only decides when to show / dismiss the toast.
+export function createWsReconnectToast(opts: Options): WsReconnectToast {
+  let firstFailureAt: number | null = null;
+  let failureCount = 0;
+  let reconnectingId: string | number | null = null;
+  let persistentId: string | number | null = null;
+
+  function dismissReconnecting(): void {
+    if (reconnectingId !== null) {
+      toast.dismiss(reconnectingId);
+      reconnectingId = null;
+    }
+  }
+  function dismissPersistent(): void {
+    if (persistentId !== null) {
+      toast.dismiss(persistentId);
+      persistentId = null;
+    }
+  }
+
+  return {
+    onFailure() {
+      if (firstFailureAt === null) firstFailureAt = Date.now();
+      failureCount += 1;
+      const elapsed = Date.now() - firstFailureAt;
+
+      // Escalate to red error + Retry button after PERSISTENT_AFTER_MS. Replaces
+      // the gray toast if it's still showing.
+      if (persistentId === null && elapsed >= PERSISTENT_AFTER_MS) {
+        dismissReconnecting();
+        persistentId = toast.error(`${opts.label}: connection lost`, {
+          duration: Infinity,
+          action: {
+            label: 'Retry now',
+            onClick: () => {
+              dismissReconnecting();
+              dismissPersistent();
+              opts.onRetryNow();
+            },
+          },
+        });
+        return;
+      }
+
+      // Gray "reconnecting…" toast once we've crossed either threshold.
+      if (
+        reconnectingId === null &&
+        persistentId === null &&
+        (failureCount >= TOAST_AFTER_FAILS || elapsed >= TOAST_AFTER_MS)
+      ) {
+        reconnectingId = toast.warning(`${opts.label}: reconnecting…`, {
+          duration: Infinity,
+        });
+      }
+    },
+    onConnected() {
+      firstFailureAt = null;
+      failureCount = 0;
+      dismissReconnecting();
+      dismissPersistent();
+    },
+    dispose() {
+      firstFailureAt = null;
+      failureCount = 0;
+      dismissReconnecting();
+      dismissPersistent();
+    },
+  };
+}

apps/web/src/lib/attachments.ts

@@ -8,6 +8,34 @@ export type Attachment = {
   source: '@' | 'line-select' | 'drop' | 'paste';
 };
 
+// v1.7: caps shared between drag-drop and paste-as-attachment so both paths
+// reject the same way. Match the existing 10-attachment cap in
+// ChatInput.addAttachment.
+export const MAX_FILE_SIZE_BYTES = 5 * 1024 * 1024; // 5 MB
+export const PASTE_INLINE_MAX_LINES = 8;
+
+// First-8KB null-byte scan. Returns true if the content looks binary.
+// Accepts a string (post-decode), an ArrayBuffer (pre-decode), or a Uint8Array.
+// For binary files like PNG, scanning bytes is more reliable than scanning
+// post-UTF-8-decode strings because invalid sequences may be replaced rather
+// than preserved.
+export function looksBinary(content: string | ArrayBuffer | Uint8Array): boolean {
+  const SCAN_BYTES = 8192;
+  if (typeof content === 'string') {
+    const max = Math.min(content.length, SCAN_BYTES);
+    for (let i = 0; i < max; i++) {
+      if (content.charCodeAt(i) === 0) return true;
+    }
+    return false;
+  }
+  const bytes = content instanceof Uint8Array ? content : new Uint8Array(content);
+  const max = Math.min(bytes.length, SCAN_BYTES);
+  for (let i = 0; i < max; i++) {
+    if (bytes[i] === 0) return true;
+  }
+  return false;
+}
+
 export const LANG_MAP: Record<string, string> = {
   ts: 'typescript', tsx: 'tsx', js: 'javascript', jsx: 'jsx',
   mjs: 'javascript', cjs: 'javascript',

apps/web/src/pages/Home.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useState } from 'react';
-import { ChevronDown, ChevronRight, Folder, RotateCcw } from 'lucide-react';
+import { ChevronDown, ChevronRight, Folder, FolderTree, Menu, RotateCcw } from 'lucide-react';
 import { toast } from 'sonner';
 import { Button } from '@/components/ui/button';
 import { AddProjectModal } from '@/components/AddProjectModal';
@@ -8,6 +8,9 @@ import { api } from '@/api/client';
 import type { Project } from '@/api/types';
 import { sessionEvents } from '@/hooks/sessionEvents';
 import { useSidebar } from '@/hooks/useSidebar';
+import { useSidebarDrawer } from '@/hooks/useSidebarDrawer';
+import { useRightRailDrawer } from '@/hooks/useRightRailDrawer';
+import { useViewport } from '@/hooks/useViewport';
 
 export function Home() {
   const { data } = useSidebar();
@@ -15,6 +18,9 @@ export function Home() {
   const [createOpen, setCreateOpen] = useState(false);
   const [archived, setArchived] = useState<Project[] | null>(null);
   const [showArchived, setShowArchived] = useState(false);
+  const { setOpen: setSidebarOpen } = useSidebarDrawer();
+  const { toggle: toggleRightRail } = useRightRailDrawer();
+  const { isMobile } = useViewport();
 
   const empty = data ? data.projects.length === 0 : false;
 
@@ -70,8 +76,32 @@ export function Home() {
   }
 
   return (
-    <div className="flex-1 flex flex-col items-center px-6 py-12 overflow-y-auto">
-      <div className="w-full max-w-md space-y-6">
+    <div className="flex-1 flex flex-col min-h-0">
+      {isMobile && (
+        <header
+          className="border-b px-3 sm:px-4 py-2 flex items-center gap-1.5 shrink-0 text-sm"
+          style={{ paddingTop: 'max(0.5rem, env(safe-area-inset-top))' }}
+        >
+          <button
+            type="button"
+            onClick={() => setSidebarOpen(true)}
+            className="inline-flex items-center justify-center -ml-1 min-w-[44px] min-h-[44px] rounded text-muted-foreground hover:bg-muted hover:text-foreground shrink-0"
+            aria-label="Open sidebar"
+          >
+            <Menu className="size-5" />
+          </button>
+          <button
+            type="button"
+            onClick={toggleRightRail}
+            className="inline-flex items-center justify-center -mr-1 ml-auto min-w-[44px] min-h-[44px] rounded text-muted-foreground hover:bg-muted hover:text-foreground shrink-0"
+            aria-label="Toggle file browser"
+          >
+            <FolderTree className="size-5" />
+          </button>
+        </header>
+      )}
+      <div className="flex-1 flex flex-col items-center px-6 py-12 overflow-y-auto">
+        <div className="w-full max-w-md space-y-6">
         <div className="text-center space-y-3">
           {empty ? (
             <>
@@ -127,9 +157,10 @@ export function Home() {
             )}
           </div>
         )}
+        </div>
+        <AddProjectModal open={addOpen} onOpenChange={setAddOpen} onAdded={() => {}} />
+        <CreateProjectModal open={createOpen} onOpenChange={setCreateOpen} />
       </div>
-      <AddProjectModal open={addOpen} onOpenChange={setAddOpen} onAdded={() => {}} />
-      <CreateProjectModal open={createOpen} onOpenChange={setCreateOpen} />
     </div>
   );
 }

apps/web/src/pages/Project.tsx

@@ -1,12 +1,14 @@
 import { useEffect, useState } from 'react';
 import { Link, useNavigate, useParams } from 'react-router-dom';
-import { Plus, MessageSquare, Trash2, ChevronDown, ChevronRight, RotateCcw } from 'lucide-react';
+import { Plus, MessageSquare, Trash2, ChevronDown, ChevronRight, RotateCcw, Menu } 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 { useSidebarDrawer } from '@/hooks/useSidebarDrawer';
+import { useViewport } from '@/hooks/useViewport';
 
 export function Project() {
   const { id } = useParams<{ id: string }>();
@@ -16,6 +18,8 @@ export function Project() {
   const [creating, setCreating] = useState(false);
   const [archivedSessions, setArchivedSessions] = useState<Session[] | null>(null);
   const [showArchived, setShowArchived] = useState(false);
+  const { setOpen: setDrawerOpen } = useSidebarDrawer();
+  const { isMobile } = useViewport();
 
   useEffect(() => {
     if (!id) return;
@@ -76,18 +80,33 @@ export function Project() {
 
   return (
     <div className="flex-1 flex flex-col">
-      <header className="border-b px-6 py-3 flex items-center justify-between">
-        <div>
-          <h1 className="text-lg font-semibold tracking-tight">
-            {project?.name ?? '…'}
-          </h1>
-          <div className="text-xs text-muted-foreground font-mono">
-            {project?.path}
+      <header
+        className="border-b px-3 sm:px-6 py-2 sm:py-3 flex items-center justify-between gap-2"
+        style={{ paddingTop: 'max(0.5rem, env(safe-area-inset-top))' }}
+      >
+        <div className="flex items-center gap-2 min-w-0">
+          {isMobile && (
+            <button
+              type="button"
+              onClick={() => setDrawerOpen(true)}
+              className="inline-flex items-center justify-center -ml-1 min-w-[44px] min-h-[44px] rounded text-muted-foreground hover:bg-muted hover:text-foreground shrink-0"
+              aria-label="Open sidebar"
+            >
+              <Menu className="size-5" />
+            </button>
+          )}
+          <div className="min-w-0">
+            <h1 className="text-base sm:text-lg font-semibold tracking-tight truncate">
+              {project?.name ?? '…'}
+            </h1>
+            <div className="text-xs text-muted-foreground font-mono truncate hidden sm:block">
+              {project?.path}
+            </div>
           </div>
         </div>
-        <Button onClick={handleNew} disabled={creating}>
+        <Button onClick={handleNew} disabled={creating} className="shrink-0" aria-label="New session">
           <Plus />
-          New session
+          <span className="hidden sm:inline">New session</span>
         </Button>
       </header>
 

apps/web/src/pages/Session.tsx

@@ -1,39 +1,97 @@
-import { useEffect, useState } from 'react';
-import { Link, useNavigate, useParams } from 'react-router-dom';
-import { ChevronRight } from 'lucide-react';
+import { useCallback, useEffect, useState } from 'react';
+import {
+  Link,
+  useLocation,
+  useNavigate,
+  useParams,
+  useSearchParams,
+} from 'react-router-dom';
+import { ChevronRight, FolderTree, Menu } from 'lucide-react';
 import { api } from '@/api/client';
 import type { Project, Session as SessionType } from '@/api/types';
 import { sessionEvents } from '@/hooks/sessionEvents';
 import { useActivePane } from '@/hooks/useActivePane';
+import { useSidebarDrawer } from '@/hooks/useSidebarDrawer';
+import { useRightRailDrawer } from '@/hooks/useRightRailDrawer';
+import { useViewport } from '@/hooks/useViewport';
+import { useWorkspacePanes, MAX_PANES } from '@/hooks/useWorkspacePanes';
+import { useSessionChats } from '@/hooks/useSessionChats';
+import { useProjectGit } from '@/hooks/useProjectGit';
 import { Workspace } from '@/components/Workspace';
 import { ModelPicker } from '@/components/ModelPicker';
+import { MobileTabSwitcher } from '@/components/MobileTabSwitcher';
+import { NewPaneMenu } from '@/components/NewPaneMenu';
+import { cn } from '@/lib/utils';
 
 export function Session() {
   const { id } = useParams<{ id: string }>();
+  if (!id) return null;
+  // v1.8: key on id so route navigation remounts SessionInner — the hoisted
+  // useWorkspacePanes + useSessionChats then reinitialize cleanly from the
+  // new sessionId instead of carrying stale state across sessions.
+  return <SessionInner key={id} sessionId={id} />;
+}
+
+function SessionInner({ sessionId }: { sessionId: string }) {
   const navigate = useNavigate();
+  const location = useLocation();
+  const [searchParams] = useSearchParams();
   const [session, setSession] = useState<SessionType | null>(null);
   const [project, setProject] = useState<Project | null>(null);
   const [name, setName] = useState('');
   const [editingName, setEditingName] = useState(false);
   const active = useActivePane();
+  const { setOpen: setDrawerOpen } = useSidebarDrawer();
+  const { toggle: toggleRightRail } = useRightRailDrawer();
+  const { isMobile } = useViewport();
+
+  // v1.8: pane + chat state hoisted into Session so the mobile header pill
+  // (MobileTabSwitcher) shares one source of truth with the pane grid below.
+  const panesHook = useWorkspacePanes(sessionId);
+  const {
+    panes,
+    activePaneIdx,
+    setActivePaneIdx,
+    openChatInPane,
+    activePaneIdxRef,
+    addSplitPane,
+    removePane,
+    removeChatFromPanes,
+    initializeFirstChatIfEmpty,
+  } = panesHook;
+
+  const openChatInActivePane = useCallback(
+    (chatId: string) => openChatInPane(activePaneIdxRef.current, chatId),
+    [openChatInPane, activePaneIdxRef],
+  );
+  const chatsHook = useSessionChats(sessionId, {
+    removeChatFromPanes,
+    openChatInPane,
+    openChatInActivePane,
+    initializeFirstChatIfEmpty,
+  });
+  const { chats, renameChat } = chatsHook;
+
+  // v1.8 Level 1: branch indicator. Polls every 30s; server caches the same
+  // span so back-to-back loads are cheap. Returns null until the first fetch
+  // resolves or if the project isn't a git repo.
+  const git = useProjectGit(project?.id);
 
   useEffect(() => {
-    if (!id) return;
     setSession(null);
     setProject(null);
     let cancelled = false;
     api.sessions
-      .get(id)
+      .get(sessionId)
       .then((s) => {
         if (cancelled) return;
         setSession(s);
         setName(s.name);
         sessionEvents.emit({
           type: 'session_loaded',
-          session_id: id,
+          session_id: sessionId,
           project_id: s.project_id,
         });
-        // Load project for breadcrumb. Listing is fine — small N, cached by client.
         api.projects.list().then((projects) => {
           if (cancelled) return;
           const p = projects.find((x) => x.id === s.project_id);
@@ -44,34 +102,61 @@ export function Session() {
     return () => {
       cancelled = true;
     };
-  }, [id]);
+  }, [sessionId]);
 
   useEffect(() => {
-    if (!id) return;
     return sessionEvents.subscribe((event) => {
-      if (event.type === 'session_renamed' && event.session_id === id) {
+      if (event.type === 'session_renamed' && event.session_id === sessionId) {
         setSession((prev) => (prev ? { ...prev, name: event.name } : prev));
         setName((prev) => (editingName ? prev : event.name));
         return;
       }
       if (
         (event.type === 'session_deleted' || event.type === 'session_archived') &&
-        event.session_id === id
+        event.session_id === sessionId
       ) {
         navigate(`/project/${event.project_id}`);
       }
     });
-  }, [id, editingName, navigate]);
+  }, [sessionId, editingName, navigate]);
+
+  // v1.8: URL ?pane= sync (mobile only). Lifted from Workspace.tsx so
+  // MobileTabSwitcher's onSwitchPane can push the same URL state and the
+  // browser Back button continues to walk pane history on mobile.
+  useEffect(() => {
+    if (!isMobile || panes.length === 0) return;
+    const paneId = searchParams.get('pane');
+    if (!paneId) {
+      if (activePaneIdx !== 0) setActivePaneIdx(0);
+      return;
+    }
+    const idx = panes.findIndex((p) => p.id === paneId);
+    if (idx >= 0 && idx !== activePaneIdx) setActivePaneIdx(idx);
+  }, [isMobile, searchParams, panes, activePaneIdx, setActivePaneIdx]);
+
+  const switchActivePane = useCallback(
+    (idx: number) => {
+      setActivePaneIdx(idx);
+      if (isMobile) {
+        const pane = panes[idx];
+        if (!pane) return;
+        const params = new URLSearchParams(location.search);
+        params.set('pane', pane.id);
+        navigate(`${location.pathname}?${params.toString()}`);
+      }
+    },
+    [setActivePaneIdx, isMobile, panes, navigate, location.pathname, location.search],
+  );
 
   async function saveName() {
-    if (!id || !session) return;
+    if (!session) return;
     const trimmed = name.trim();
     if (!trimmed || trimmed === session.name) {
       setName(session.name);
       setEditingName(false);
       return;
     }
-    const updated = await api.sessions.update(id, { name: trimmed });
+    const updated = await api.sessions.update(sessionId, { name: trimmed });
     setSession(updated);
     setEditingName(false);
     // Server publishes session_renamed via broker.publishUser; no local emit needed.
@@ -79,80 +164,180 @@ export function Session() {
 
   // Workspace only sets activeFile for file-browser panes; checking it alone
   // suffices and is forward-compatible with future pane kinds.
-  const showActiveFile = active.sessionId === id && !!active.activeFile;
+  const showActiveFile = active.sessionId === sessionId && !!active.activeFile;
 
   return (
     <div className="flex-1 flex flex-col min-h-0">
-      <header className="border-b px-4 py-2 flex items-center gap-1.5 shrink-0 text-sm">
-        <Link to="/" className="text-muted-foreground hover:text-foreground">
-          Projects
-        </Link>
-        <ChevronRight className="size-3 text-muted-foreground/60" />
-        {project ? (
-          <Link
-            to={`/project/${project.id}`}
-            className="text-muted-foreground hover:text-foreground truncate max-w-[200px]"
-            title={project.name}
-          >
-            {project.name}
-          </Link>
-        ) : (
-          <span className="text-muted-foreground/60">…</span>
+      <header
+        className={cn(
+          'border-b shrink-0 text-sm',
+          isMobile
+            ? 'flex flex-col gap-1.5 px-3 py-2'
+            : 'flex items-center gap-1.5 px-3 sm:px-4 py-2',
         )}
-        <ChevronRight className="size-3 text-muted-foreground/60" />
-        {editingName ? (
-          <input
-            autoFocus
-            value={name}
-            onChange={(e) => setName(e.target.value)}
-            onBlur={() => void saveName()}
-            onKeyDown={(e) => {
-              if (e.key === 'Enter') void saveName();
-              if (e.key === 'Escape') {
-                setName(session?.name ?? '');
-                setEditingName(false);
-              }
-            }}
-            className="bg-transparent border-b border-border px-1 py-0.5 text-sm font-medium outline-none focus:border-ring"
-          />
-        ) : (
-          <button
-            type="button"
-            className="text-sm font-medium hover:underline truncate max-w-[280px]"
-            onClick={() => setEditingName(true)}
-            title={session?.name ?? ''}
-          >
-            {session?.name ?? '…'}
-          </button>
-        )}
-        {showActiveFile && active.activeFile && (
+        style={{ paddingTop: 'max(0.5rem, env(safe-area-inset-top))' }}
+      >
+        {isMobile ? (
           <>
-            <span className="text-muted-foreground/40 mx-1">·</span>
-            <span
-              className="text-xs font-mono text-muted-foreground truncate max-w-[320px]"
-              title={active.activeFile}
-            >
-              {active.activeFile}
-            </span>
-          </>
-        )}
-        <div className="ml-auto">
-          {session && (
-            <div className="inline-flex items-center rounded-full bg-muted/40 hover:bg-muted/70 px-1">
-              <ModelPicker
-                value={session.model}
-                onChange={async (model) => {
-                  const updated = await api.sessions.update(session.id, { model });
-                  setSession(updated);
-                }}
+            {/* v1.8 mobile row 1: hamburger | repo+branch | ModelPicker | FolderTree.
+                Gear/kebab cluster lands in Batch 7; ModelPicker stays here until
+                then so mobile users keep model-switching access. */}
+            <div className="flex items-center gap-1.5">
+              <button
+                type="button"
+                onClick={() => setDrawerOpen(true)}
+                className="inline-flex items-center justify-center -ml-1 min-w-[44px] min-h-[44px] rounded text-muted-foreground hover:bg-muted hover:text-foreground shrink-0"
+                aria-label="Open sidebar"
+              >
+                <Menu className="size-5" />
+              </button>
+
+              <div className="flex-1 min-w-0 flex items-center justify-center gap-1.5">
+                {project ? (
+                  <span className="text-sm font-medium truncate" title={project.name}>
+                    {project.name}
+                  </span>
+                ) : (
+                  <span className="text-muted-foreground/60">…</span>
+                )}
+                {git?.branch && (
+                  <span
+                    className="text-muted-foreground/80 text-xs truncate"
+                    title={`branch: ${git.branch}${git.is_dirty ? ' (dirty)' : ''}`}
+                  >
+                    · {git.branch}
+                  </span>
+                )}
+              </div>
+
+              {session && (
+                <div className="inline-flex items-center rounded-full bg-muted/40 hover:bg-muted/70 px-1 shrink-0">
+                  <ModelPicker
+                    value={session.model}
+                    onChange={async (model) => {
+                      const updated = await api.sessions.update(session.id, { model });
+                      setSession(updated);
+                    }}
+                  />
+                </div>
+              )}
+
+              <button
+                type="button"
+                onClick={toggleRightRail}
+                className="inline-flex items-center justify-center -mr-1 min-w-[44px] min-h-[44px] rounded text-muted-foreground hover:bg-muted hover:text-foreground shrink-0"
+                aria-label="Toggle file browser"
+              >
+                <FolderTree className="size-5" />
+              </button>
+            </div>
+
+            {/* v1.8 mobile row 2: pane-switcher pill + new-pane menu. Pill
+                expands; NewPaneMenu is the trailing 44x44 trigger. */}
+            <div className="flex items-center gap-1.5">
+              <MobileTabSwitcher
+                panes={panes}
+                activePaneIdx={activePaneIdx}
+                chats={chats}
+                onSwitchPane={switchActivePane}
+                onRemovePane={removePane}
+                onRenameChat={renameChat}
+              />
+              <NewPaneMenu
+                onAddPane={addSplitPane}
+                disabled={panes.length >= MAX_PANES}
               />
             </div>
-          )}
-        </div>
+          </>
+        ) : (
+          <>
+            {/* Desktop: unchanged single-row header. */}
+            <div className="hidden sm:flex items-center gap-1.5 min-w-0">
+              <Link to="/" className="text-muted-foreground hover:text-foreground shrink-0 text-xs">
+                Projects
+              </Link>
+              <ChevronRight className="size-3 text-muted-foreground/60 shrink-0" />
+              {project ? (
+                <Link
+                  to={`/project/${project.id}`}
+                  className="text-muted-foreground hover:text-foreground truncate max-w-[200px]"
+                  title={project.name}
+                >
+                  {project.name}
+                </Link>
+              ) : (
+                <span className="text-muted-foreground/60">…</span>
+              )}
+              <ChevronRight className="size-3 text-muted-foreground/60 shrink-0" />
+            </div>
+
+            {editingName ? (
+              <input
+                autoFocus
+                value={name}
+                onChange={(e) => setName(e.target.value)}
+                onBlur={() => void saveName()}
+                onKeyDown={(e) => {
+                  if (e.key === 'Enter') void saveName();
+                  if (e.key === 'Escape') {
+                    setName(session?.name ?? '');
+                    setEditingName(false);
+                  }
+                }}
+                className="bg-transparent border-b border-border px-1 py-0.5 text-sm font-medium outline-none focus:border-ring min-w-0"
+              />
+            ) : (
+              <button
+                type="button"
+                className="text-sm font-medium hover:underline truncate max-w-[280px] min-w-0"
+                onClick={() => setEditingName(true)}
+                title={session?.name ?? ''}
+              >
+                {session?.name ?? '…'}
+              </button>
+            )}
+
+            {showActiveFile && active.activeFile && (
+              <>
+                <span className="text-muted-foreground/40 mx-1">·</span>
+                <span
+                  className="text-xs font-mono text-muted-foreground truncate max-w-[200px]"
+                  title={active.activeFile}
+                >
+                  {active.activeFile}
+                </span>
+              </>
+            )}
+
+            <div className="ml-auto shrink-0">
+              {session && (
+                <div className="inline-flex items-center rounded-full bg-muted/40 hover:bg-muted/70 px-1">
+                  <ModelPicker
+                    value={session.model}
+                    onChange={async (model) => {
+                      const updated = await api.sessions.update(session.id, { model });
+                      setSession(updated);
+                    }}
+                  />
+                </div>
+              )}
+            </div>
+          </>
+        )}
       </header>
 
-      {id && session && (
-        <Workspace sessionId={id} projectId={session.project_id} />
+      {session && (
+        <Workspace
+          sessionId={sessionId}
+          projectId={session.project_id}
+          agentId={session.agent_id}
+          onAgentChange={async (agent_id) => {
+            const updated = await api.sessions.update(session.id, { agent_id });
+            setSession(updated);
+          }}
+          panesHook={panesHook}
+          chatsHook={chatsHook}
+        />
       )}
     </div>
   );

boocode_roadmap.md

@@ -0,0 +1,344 @@
+# BooCode v1.x — Roadmap
+
+Last updated: 2026-05-16
+
+## Overview
+
+BooCode is a standalone code-chat tool at `/opt/boocode/`. Read-only by design — pick a project, chat with a local LLM that has file-inspection tools, get streaming responses over WebSocket.
+
+Live at `https://code.indifferentketchup.com` (Caddy → Authelia → Tailscale → `100.114.205.53:9500`).
+
+**Architectural commitments:**
+
+- No embeddings. The model uses file-view tools (`view_file`, `list_dir`, `grep`, `find_files`) + sidecar analyzers (codecontext, codesight). Walked away from the RAG pipeline May 2026.
+- Read-only in v1.x. Write tools land in BooCoder (separate container, post-v1.x).
+- One Postgres (`boocode_db`), one frontend SPA, container-per-service for new capabilities.
+
+External code lifted from / referenced in: see `boocode_code_review.md` for full inventory.
+
+-----
+
+## Batch summary
+
+|Batch                                     |Theme                                                                              |Status     |Branch / Notes                         |
+|------------------------------------------|-----------------------------------------------------------------------------------|-----------|---------------------------------------|
+|1                                         |Markdown, Copy + Regen, tok/s + ctx, AI naming                                     |✅ Done     |`v1.1-batch1` merged                   |
+|2                                         |Sidebar restructure                                                                |✅ Done     |`v1.1-batch2` merged                   |
+|3                                         |Pane system, FileBrowserPane + Shiki, cross-tab                                    |✅ Done     |`v1.1-batch3` merged                   |
+|3.5                                       |Chip infrastructure, `@file`, line-select                                          |✅ Done     |merged                                 |
+|4 (v1.2)                                  |Chats inside sessions, right-rail, `/compact`, archive, force-send                 |✅ Done     |merged                                 |
+|4.1–4.4                                   |Project archive, sidebar context, Gitea API, bootstrap                             |✅ Done     |merged                                 |
+|v1.5 cleanup                              |resolveProjectPath, BOOTSTRAP_ROOT, vitest pin                                     |✅ Done     |merged                                 |
+|v1.6 mobile                               |Drawer, single-pane, long-press, IME-safe, pull-to-refresh, swipe-close            |✅ Done     |merged                                 |
+|v1.6.1                                    |RightRail mobile wrapper fix                                                       |✅ Done     |merged                                 |
+|Tool-loop bump                            |MAX_TOOL_LOOP_DEPTH 5→15                                                           |✅ Done     |merged                                 |
+|v1.6.2                                    |Workspace + Session+Project headers + ChatTabBar new-chat + RightRail mobile drawer|🔄 In flight|`v1.6.2-mobile-ui-fixes`               |
+|**v1.8 mobile tabs**                      |**Bottom-sheet pane switcher + cross-tab `pane_status` WS sync + StatusDot on tabs**|**Next up**|`v1.8-mobile-tabs`; hand-rolled sheet  |
+|9 (REORDERED, DECOUPLED)                  |Agents (Tier 2): `AGENTS.md`, per-agent temp/tools, picker in ChatInput toolbar    |✅ Implemented, uncommitted|six builtins; on `main` awaiting commit|
+|5                                         |Fork message, delete message, header polish                                        |Planned    |                                       |
+|6                                         |Drag-drop file + paste-as-attachment                                               |Planned    |thin extension of 3.5 chips            |
+|7                                         |Settings drawer: system prompt, web search toggle, agent entry                     |Planned    |adds SettingsDrawer agent entry (Batch 9 deferred half) |
+|8                                         |Web search backend: SearXNG `web_search` + `web_fetch`                             |Planned    |                                       |
+|10                                        |BooTerm: separate container, xterm.js + node-pty + tmux                            |Planned    |                                       |
+|11 — Architect: codebase map              |codecontext sidecar + MCP tool wiring                                              |Planned    |from nmakod/codecontext                |
+|11b — Architect: repo health              |call graph, circular deps, dead code                                               |Planned    |from spirituslab/codesight             |
+|12 — Tool approval + plan/act mode        |Read-only invariant, per-tool gating                                               |Planned    |from cline                             |
+|13 — Append-only event log                |Replace messages-table semantics                                                   |Planned    |from OpenHands V1                      |
+|14 — BooCoder: pending changes            |Sandboxed edit queue, atomic apply                                                 |Post-v1.x  |from plandex                           |
+|15 — BooCoder runtime isolation           |Per-session Docker sandbox                                                         |Post-v1.x  |from OpenHands                         |
+|16 — Multi-provider LLM                   |Optional litellm-style abstraction                                                 |Optional   |from pi-ai                             |
+|17 — Workflow graphs                      |Multi-agent coordination                                                           |Far future |from microsoft/agent-framework concepts|
+
+**Old Batch 12 (codebase indexer w/ Harrier embeddings) — REMOVED.** Replaced by Batch 11/11b sidecar approach. See `boocode_code_review.md` decisions log.
+
+**Batch 9 reordered ahead of 5–8, 10.** Picker mounts in `ChatInput.tsx` toolbar only. SettingsDrawer agent entry rolled into Batch 7 when it lands. No UI dependency on Batches 5/6/7, so it can ship anytime after v1.6.2.
+
+-----
+
+## Batch details (planned / new)
+
+### Batch 9 — Agents (Tier 2, DECOUPLED)
+
+**Spec:** `boocode_batch9.md` with the deltas below.
+
+**Status:** Next up after v1.6.2 merges. Decoupled from Batch 7.
+
+**Deltas from `boocode_batch9.md`:**
+
+1. Builtin defaults in `agents.ts` OMIT the `model` field. Resolution order makes `session.model` win when `agent.model` is null. Spec line 30 example is misleading — do not hardcode any model in builtins.
+2. Builtin defaults are the six agents shipped in `/opt/boocode/AGENTS.md`: **Code Reviewer, Debugger, Refactorer, Architect, Security Auditor, Prompt Builder.** If project root `AGENTS.md` exists, only its agents show. If absent, show the six builtins.
+3. AgentPicker mounts in `ChatInput.tsx` toolbar between ModelPicker and the `+` button. **No `SettingsDrawer.tsx` or `Header.tsx` changes in this batch.**
+4. SettingsDrawer agent entry + Header active-agent badge moved to Batch 7.
+
+**Files to create:**
+
+- `apps/server/src/services/agents.ts` — parser, six builtin defaults, mtime-keyed cache.
+- `apps/server/src/routes/agents.ts` — `GET /api/projects/:id/agents`.
+- `apps/web/src/components/AgentPicker.tsx` — dropdown, matches ModelPicker pattern.
+
+**Files to modify:**
+
+- `apps/server/src/schema.sql` — `ALTER TABLE sessions ADD COLUMN IF NOT EXISTS agent_id TEXT;`
+- `apps/server/src/services/inference.ts` — resolution order: `effective_system_prompt`, `effective_model`, `effective_temperature`, `effective_tools` from session + agent + project. Filter tools array against agent whitelist before sending to llama-swap.
+- `apps/server/src/routes/sessions.ts` — PATCH accepts `agent_id`.
+- `apps/server/src/types/api.ts` — Agent type, extend Session with `agent_id`.
+- `apps/web/src/api/client.ts`, `apps/web/src/api/types.ts` — Agent type, `api.agents.list(projectId)`.
+- `apps/web/src/components/ChatInput.tsx` — mount AgentPicker.
+
+**Testing plan (manual, before locking temps):**
+
+- Drop `/opt/boocode/AGENTS.md` (six agents, no `model` field on any).
+- For each of the 7 keeper models, switch session model and run the same target prompt against each agent. Log tok/s, instruction-following quality.
+- Adjust per-agent temperature in `AGENTS.md` based on results.
+- A/B candidates: qwen3.6-35b-a3b-mxfp4 (daily), qwopus3.6-35b-a3b-q4 (reasoning), qwopus3.5-27b-q4, qwen3.6-27b-ud-q4-xl, nemotron-3-nano-30b, gemma-4-26b-a4b-mxfp4, qwen3-coder-30b-apex.
+
+**Dependencies:** v1.6.2 merged.
+
+-----
+
+### Batch 11 — Architect: codebase map (REVISED)
+
+**Inspiration / lift:** `nmakod/codecontext` (MIT, Go binary).
+
+**What it gives BooCode:** an architect-grade codebase overview without embeddings. Codecontext parses the repo with tree-sitter, extracts symbols, builds import/dependency relationships, and exposes the result via an MCP server with 8 tools. The model gets a structural map of any codebase on demand.
+
+**Why this replaces the original Batch 11 (aider PageRank port):** codecontext is a finished binary in our stack language (Go), with watch mode, incremental updates, framework detection, and git-co-change-based semantic neighborhoods (no embeddings). The aider port would be reimplementing what codecontext already ships.
+
+**Scope:**
+
+- Add `codecontext` sidecar container to `docker-compose.yml`. Mount the project root read-only. One sidecar per BooCode instance — projects are addressed by absolute path.
+- Wire each codecontext MCP tool into BooCode’s `inference/tools.ts` as a native tool the model can call:
+ - `repo_overview(project_id)` → codecontext `get_codebase_overview`
+ - `repo_file_analysis(project_id, path)` → `get_file_analysis`
+ - `repo_symbol_info(project_id, symbol)` → `get_symbol_info`
+ - `repo_search_symbols(project_id, query)` → `search_symbols`
+ - `repo_dependencies(project_id, path)` → `get_dependencies`
+ - `repo_semantic_neighborhoods(project_id, path)` → `get_semantic_neighborhoods` (git co-change)
+ - `repo_framework_analysis(project_id)` → `get_framework_analysis`
+- `path_guard.ts` extension: incorporate `continuedev/continue` `DEFAULT_SECURITY_IGNORE_FILETYPES` so codecontext can’t surface `.env`, `.pem`, keys, etc.
+- Fallback grammars: drop `Aider-AI/aider`‘s `aider/queries/tree-sitter-*.scm` files for any language codecontext doesn’t cover. Use them via an in-process tree-sitter wrapper *only if* a project needs an unsupported language. Defer wrapper build until that’s an actual gap.
+
+**Where it goes:** new `apps/server/src/architect/` directory. No new tables — codecontext maintains its own state on disk. New env: `CODECONTEXT_URL=http://codecontext:8765` (MCP endpoint).
+
+**Decisions to make at recon time:**
+
+- Bundle the binary directly in the BooCode Dockerfile, or run codecontext as its own service? Sidecar is cleaner. Bundle is one less container.
+- How does the model discover codecontext tools — register them statically in the tools registry, or proxy MCP `tools/list` at startup?
+
+**Dependencies:** none. Can ship before Batches 5–10.
+
+-----
+
+### Batch 11b — Architect: repo health (NEW)
+
+**Inspiration / lift:** `spirituslab/codesight` (MIT-ish, TS/Node).
+
+**What it gives BooCode:** complement to Batch 11. Where codecontext answers “what is this codebase,” repo health answers “what’s wrong with this codebase.” Call graph, circular dependency detection, dead code flagging.
+
+**Scope:**
+
+- Port codesight’s `analyze.mjs` analyzer core into `apps/server/src/architect/repo_health.ts`. Drop the VS Code extension shell. Keep:
+ - Symbol extraction (already overlaps codecontext — call codecontext where possible, only redo what’s needed for graph edges).
+ - Call graph builder (function-to-function edges).
+ - Circular dependency detector.
+ - Dead code detector (exported symbols never imported or called).
+- New tool: `repo_health(project_id)` returning `{ circular_dependencies: [...], dead_code: [...] }`. Output respects codesight’s documented false-positive caveats (customElements.define, framework entry points, dynamic imports) — surface those in the tool description so the model doesn’t trust dead-code flags blindly.
+- Cache results in `boocode_db` keyed by `(project_id, file_hashes)`. Invalidate on file change via file-index hash check.
+
+**Decisions:**
+
+- Build it in-process (Node) vs spawn a CLI? In-process is simpler. Spawn matches codecontext sidecar pattern but adds latency.
+
+**Dependencies:** Batch 11 merged (so we can reuse codecontext’s parse output where possible). Can be deferred until after Batches 5–10.
+
+-----
+
+### Batch 12 — Tool approval gating + plan/act mode
+
+**Inspiration / lift:** `cline/cline` (Apache-2.0).
+
+**What it gives BooCode:** per-session control over which tools the model can call. Lays the groundwork for BooCoder by building the gating mechanism before there are any write tools to gate.
+
+**Scope:**
+
+- New column `sessions.tool_approval_mode TEXT` — values: `read_only` (v1.x default), `plan`, `act_auto`, `act_approve`.
+- New column `sessions.approved_tools JSONB` — per-session whitelist for `act_approve` mode.
+- Tool registry refactor: tools tagged `read_only` or `write`. In `read_only` mode (v1.x), write tools never appear in the model’s tools array. In `plan` mode, same — write tools hidden, model produces a plan only. `act_*` modes unlock writes (post-v1.x).
+- UI: mode picker in SettingsDrawer (Batch 7 dependency). Inline indicator in chat header.
+
+**Dependencies:** Batch 7 (SettingsDrawer).
+
+-----
+
+### Batch 13 — Append-only event log
+
+**Inspiration / lift:** `OpenHands/OpenHands` V1 (MIT).
+
+**What it gives BooCode:** replaces the ad-hoc `messages` table semantics with a typed event stream. Unlocks rewind, time-travel, and clean handoff semantics for multi-agent flows.
+
+**Scope:**
+
+- New `session_events` table: `(id, session_id, ts, kind, payload JSONB, parent_id)`. Event kinds: `user_message`, `assistant_message`, `tool_call`, `tool_result`, `pane_action`, `mode_change`, `system`.
+- Existing `messages` table becomes a derived view over `session_events` for backward compatibility, then deprecated over a release.
+- Inference loop emits events instead of mutating message rows.
+- Frontend `useSessionStream` reducer rewritten to consume events.
+
+**Migration is non-trivial.** Plan in a dedicated batch with explicit cutover window.
+
+**Dependencies:** Batches 5 (fork/delete) and 7 (settings) merged. Must not be in flight with other backend work.
+
+-----
+
+### Batch 14 — BooCoder: pending changes
+
+**Inspiration / lift:** `plandex-ai/plandex` (MIT).
+
+**What it gives BooCode:** safe write tools. Edits queue in a virtual layer; nothing touches the filesystem until explicit `/apply`.
+
+**Scope:**
+
+- New container `boocoder` at `100.114.205.53:9502`. Owns write tools (`edit_file`, `create_file`, `delete_file`, `apply_pending`, `rewind`).
+- New table `pending_changes (id, session_id, file_path, diff TEXT, status, created_at)`. Status: `pending`, `applied`, `rejected`.
+- Tools execute against the pending-changes layer, not the filesystem. `apply_pending` is the only path that touches disk. `rewind` rolls back a `pending`-id back to disk state.
+- BooCode chat container stays read-only (`/opt:/opt:ro`). BooCoder mounts `/opt/repos:/opt/repos:rw` and uses git worktree pattern from paseo for isolation.
+- Frontend: new pane kind `pending_diff` shows the queued diff inline with Approve/Reject per chunk.
+
+**Dependencies:** Batches 12 (gating) + 13 (events). Don’t start until both are live.
+
+-----
+
+### Batch 15 — BooCoder runtime isolation
+
+**Inspiration / lift:** `OpenHands/OpenHands` (MIT).
+
+**What it gives BooCode:** per-session Docker sandbox for BooCoder writes. Closes the `/opt:ro` mount risk identified in v1.x open items.
+
+**Scope:**
+
+- Per-session container spawned by BooCoder on first write. Container has only the project’s path mounted, not `/opt`.
+- Container lifecycle: spawn on first write call, idle-timeout after 30 min, recreate on resume.
+- Action execution server pattern: HTTP API inside the container, BooCoder calls in. Standard OpenHands runtime contract.
+
+**Dependencies:** Batch 14.
+
+-----
+
+### Batch 16 — Multi-provider LLM abstraction
+
+**Inspiration / lift:** `earendil-works/pi` `pi-ai` (MIT).
+
+**What it gives BooCode:** optional non-llama-swap inference paths (Anthropic, OpenAI, Mistral direct). Currently we have one provider (llama-swap) and the existing `streamCompletion` is hardcoded to OpenAI-compatible at that endpoint.
+
+**Scope:**
+
+- Provider abstraction: `interface LLMProvider { stream(req): AsyncIterator<Frame> }`.
+- Built-in: llama-swap (current), Anthropic, OpenAI (Codex-style).
+- Per-session `provider_id` column.
+
+**Status:** **Optional. Skip unless a concrete need surfaces.** llama-swap covers daily driver work.
+
+-----
+
+### Batch 17 — Workflow graphs
+
+**Inspiration / lift:** `microsoft/agent-framework` (MIT) — concepts only.
+
+**What it gives BooCode:** multi-agent coordination. Architect → Coder → Reviewer → Verifier handoffs orchestrated by a YAML-defined workflow.
+
+**Status:** **Far future.** Read agent-framework’s `docs/decisions/` ADRs. Don’t port code — Azure/.NET-heavy.
+
+**Dependencies:** Batches 12 (modes), 13 (events). Realistically a v2.x topic.
+
+-----
+
+## Order of operations
+
+Two tracks. Pick one to drive next.
+
+**Track A — Finish v1.x mobile + polish then agents:**
+
+- v1.6.2 ships (in flight)
+- **Batch 9 (agents)** — decoupled, can land next; no UI dependency on 5/6/7
+- Batches 5, 6, 7, 8 in order. Each is small, frontend-heavy, no architecture risk. Batch 7 absorbs SettingsDrawer agent entry.
+
+**Track B — Begin architect capabilities in parallel:**
+
+- Batch 11 (codecontext sidecar) — biggest single capability jump. Frontend stays the same; new tools appear to the model.
+- Batch 11b (repo health) — follow-up.
+- Batch 12 (gating) — sets up everything post-v1.x.
+
+Recommendation: ship v1.6.2, then **Batch 9 (agents)** next so the test bed exists before Track A continues. Then Track A through Batch 7. Batch 11 can run in parallel with Batches 8–10 since 11 has no UI dependency.
+
+-----
+
+## Architecture target state
+
+### Containers
+
+|Container    |Port                            |Mount                     |Purpose                       |Status  |
+|-------------|--------------------------------|--------------------------|------------------------------|--------|
+|`boocode`    |`100.114.205.53:9500`           |`/opt:/opt:ro`            |Chat + read-only tools + SPA  |Live    |
+|`boocode_db` |`127.0.0.1:5500`                |`boocode_pgdata` volume   |Postgres 16-alpine            |Live    |
+|`codecontext`|`100.114.205.53:8765` (internal)|project root :ro          |MCP server for architect tools|Batch 11|
+|`booterm`    |`100.114.205.53:9501`           |`/opt/repos:/opt/repos:rw`|Terminals (tmux + node-pty)   |Batch 10|
+|`boocoder`   |`100.114.205.53:9502`           |per-session sandbox       |Write tools                   |Batch 14|
+
+### Schema additions
+
+**Batch 9:** `sessions.agent_id TEXT` (nullable; references AGENTS.md by slug).
+**Batch 11:** none (codecontext stateless on disk).
+**Batch 11b:** `repo_health_cache (project_id, file_hashes_sig, payload JSONB, created_at)`.
+**Batch 12:** `sessions.tool_approval_mode`, `sessions.approved_tools`.
+**Batch 13:** `session_events`; deprecate `messages` long-tail.
+**Batch 14:** `pending_changes`.
+
+-----
+
+## Lift sources (summary)
+
+Full inventory in `boocode_code_review.md`. Headline items:
+
+|Source                                |Used for                                |Where                |
+|--------------------------------------|----------------------------------------|---------------------|
+|nmakod/codecontext (MIT, Go)          |Architect: codebase map sidecar         |Batch 11             |
+|spirituslab/codesight (MIT-ish, TS)   |Architect: repo health analyzer         |Batch 11b            |
+|Aider-AI/aider (Apache-2.0)           |Fallback `.scm` grammars (60+ languages)|Batch 11 (fallback)  |
+|continuedev/continue (Apache-2.0)     |DEFAULT_SECURITY_IGNORE_FILETYPES       |Batch 11 prep        |
+|cline/cline (Apache-2.0)              |Plan/Act mode pattern                   |Batch 12             |
+|plandex-ai/plandex (MIT)              |Pending-changes data model              |Batch 14             |
+|OpenHands/OpenHands (MIT)             |Event log + sandbox runtime             |Batches 13, 15       |
+|aimasteracc/tree-sitter-analyzer (MIT)|Outline-first response patterns         |Reference            |
+|earendil-works/pi (MIT)               |Multi-provider LLM                      |Batch 16 (optional)  |
+|rshah515/claude-code-subagents (MIT)  |Reference for builtin agent prompts     |Batch 9 (six builtins)|
+|microsoft/agent-framework (MIT)       |Workflow concepts                       |Batch 17 (far future)|
+
+-----
+
+## Decisions log
+
+- **Embeddings dropped from BooCode.** Replaced RAG with file-view tools + sidecar analyzers.
+- **Original Batch 11 (aider PageRank port) replaced** by codecontext sidecar approach.
+- **Original Batch 12 (codebase indexer w/ Harrier) removed** entirely. No embedding infrastructure in BooCode v1.x.
+- **Globstar parked** — not an architect tool, future verify-before-commit candidate only.
+- **codeprysm rejected** — embedding-based; node/edge taxonomy noted as reference if we ever build our own graph.
+- **Batch 9 decoupled from Batch 7 (2026-05-16).** AgentPicker mounts in `ChatInput.tsx` toolbar only. SettingsDrawer agent entry and Header active-agent badge moved to Batch 7. Builtin defaults shipped: six agents (Code Reviewer, Debugger, Refactorer, Architect, Security Auditor, Prompt Builder) with no `model` field — session model wins by default.
+
+## Follow-ups (post-ship docs / cleanup)
+
+- **After v1.8.2 ships:** Add explicit `max_tool_calls: 30` to all 6 agents in `/data/AGENTS.md` and `/opt/boocode/AGENTS.md`. Purely for documentation/discoverability — defaults handle behavior identically (all 6 agents use only read-only tools, default is already 30).
+
+-----
+
+## Workflow
+
+Each batch:
+
+1. Verify previous batch merged.
+2. Dispatch via Paseo to Claude Code at `/opt/boocode`.
+3. Claude Code recon → blocking questions → implement → hand back.
+4. Compliance review in separate Claude chat.
+5. Deploy: `docker compose up --build -d`.
+6. Smoke test.
+7. Sam commits and pushes.
+
+Sam reviews all diffs. Sam commits. Never git pull/push/commit on his behalf.

docker-compose.yml

@@ -15,6 +15,9 @@ services:
       # Host must `mkdir -p /opt/projects` before container start.
       - /opt/projects:/opt/projects:rw
       - ./secrets/boocode_gitea:/root/.ssh/id_ed25519:ro
+      # v1.8.1: global agents file. Host seeds it once before deploy:
+      # cp /opt/boocode/AGENTS.md /opt/boocode/data/AGENTS.md
+      - ./data:/data:ro
     depends_on:
       - boocode_db
     networks: