refactor: split FileBrowserPane / Workspace / runAssistantTurn

- FileBrowserPane.tsx: deleted (unreferenced post-v1.4 PaneTab.tsx removal;
  the legacy file_browser pane kind isn't part of the active WorkspacePane
  taxonomy).
- Workspace.tsx (524 -> 172 lines): extracted useWorkspacePanes(sessionId)
  and useSessionChats(sessionId) hooks. Workspace is layout-only composition
  now. localStorage key + WS frame handling + drag semantics unchanged.
- inference.ts runAssistantTurn (~265 -> 48 lines): bundled args into
  TurnArgs interface, extracted executeStreamPhase / executeToolPhase /
  finalizeCompletion / handleAbortOrError. All WS publish ordering preserved
  byte-for-byte (mentally traced for tool / non-tool / abort / error /
  depth-exceeded paths). flushPromise chain + setImmediate + signal
  propagation unchanged.

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

CLAUDE.md

@@ -0,0 +1,109 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## What is BooCode
+
+Self-hosted single-user developer chat app. AI assistant with read-only file tools (view_file, list_dir, grep, find_files) running against a local llama-swap inference server. Sessions organized by project, with a multi-pane workspace (chat + file browser side by side).
+
+## Commands
+
+```bash
+# Development (run in separate terminals)
+pnpm dev:server          # tsx watch, port 3000
+pnpm dev:web             # Vite dev server, port 5173 (proxies /api to :3000)
+
+# Build
+pnpm build               # builds web then server
+pnpm -C apps/server build  # server only (tsc + copy schema.sql)
+pnpm -C apps/web build     # web only (vite)
+
+# Type checking (no emit)
+npx tsc --noEmit                              # project references (root)
+npx tsc -p apps/web/tsconfig.app.json --noEmit  # web app specifically
+
+# IMPORTANT: root tsc --noEmit uses project references and can miss errors
+# that the per-app tsconfig catches. Always verify with the per-app command
+# when editing web code. The server build (pnpm -C apps/server build) is
+# authoritative for server code.
+
+# Production
+docker compose build --no-cache boocode && docker compose up -d
+```
+
+There are no tests or linters configured.
+
+## Architecture
+
+**Monorepo**: pnpm workspaces with `apps/server` (Fastify + postgres) and `apps/web` (React + Vite).
+
+### Server (`apps/server/src/`)
+
+- **Fastify** with `@fastify/websocket` and `@fastify/static` (serves built frontend)
+- **postgres** (porsager/postgres) with tagged-template SQL — no ORM. Schema in `schema.sql`, applied on startup. LSP may false-positive on `sql<Type[]>\`...\`` generics; CLI `tsc` / `pnpm build` is authoritative.
+- **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/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.
+- **`services/auto_name.ts`** — Non-streaming LLM call to generate 4-word session titles after first assistant reply.
+
+Route registration: all routes registered in `index.ts` via `register*Routes(app, sql, ...)` functions. Routes are in `routes/*.ts`.
+
+### Frontend (`apps/web/src/`)
+
+- **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/`.
+
+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`).
+- **`hooks/useSessionStream.ts`** — WebSocket per session, `applyFrame` reducer builds message list from streaming frames.
+- **`hooks/useUserEvents.ts`** — Single app-level WS to `/api/ws/user` with exponential backoff reconnect. Forwards frames onto the sessionEvents bus.
+- **`hooks/useSidebar.ts`** — Module-singleton with Set<setState> subscriber pattern; one bus subscription guarded by `globalThis.__boocode_sidebar_subscribed` for HMR safety. Every new `SessionEvent` type needs a `case` in the `applyEvent` switch (no-op `return prev` is fine).
+- **`api/client.ts`** — Centralized typed fetch wrapper. All endpoints under `api.*` namespace.
+
+### Data flow for chat
+
+1. User sends message → POST `/api/sessions/:id/messages` creates user + assistant (status=streaming) rows
+2. `inference.enqueue()` starts async streaming loop
+3. LLM deltas published via `broker.publish(sessionId, frame)`
+4. Client's `useSessionStream` WS receives frames, `applyFrame` reducer updates message list
+5. Tool calls: inference executes tools server-side, publishes tool_call/tool_result frames, loops back to LLM
+6. Terminal states (complete/error): DB updated with final content + token counts, `session_updated` frame published on user channel
+
+### 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.
+
+## Database
+
+PostgreSQL 16. Tables: `projects`, `sessions`, `chats`, `messages`, `settings`, `session_panes` (deprecated). Schema applied idempotently on startup via `applySchema()`. Use `clock_timestamp()` (not `NOW()`) inside transactions. CHECK constraints in place: `projects_status_chk` ('open'|'archived'), `sessions_status_chk` (same), `chats_status_chk` (same), `messages_role_chk`, `messages_status_chk` — keep in sync with the `*_STATUSES` const arrays in `apps/server/src/types/api.ts`.
+
+Schema CHECK migration order when renaming allowed values: (1) `ALTER TABLE ... DROP CONSTRAINT IF EXISTS <system_name>` (inline `CREATE TABLE` checks get `<table>_<column>_check`), (2) `UPDATE` rows to new values, (3) wrap new constraint ADD in `DO $$ ... pg_constraint` guard — that block is the only way to get `ADD CONSTRAINT IF NOT EXISTS`.
+
+Position-shift pattern for panes (legacy `session_panes` table): negate-and-restore to avoid UNIQUE(session_id, position) collisions during reorder/insert/delete. Sentinel value -100 for the moving pane.
+
+## Environment
+
+Required: `DATABASE_URL`, `LLAMA_SWAP_URL`. Optional: `PORT` (3000), `HOST` (0.0.0.0), `PROJECT_ROOT_WHITELIST` (/opt), `DEFAULT_MODEL`, `LOG_LEVEL`.
+
+## Workflow
+
+- 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).
+- 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).
+
+## Conventions
+
+- `overflowWrap` not `wordWrap` — TypeScript's CSSStyleDeclaration marks `wordWrap` as deprecated (error 6385).
+- No app-layer auth. Authelia handles auth at the reverse proxy. All `broker.publishUser`/`subscribeUser` calls use `'default'` as the user key.
+- TypeScript strict mode. Both apps share `tsconfig.base.json`.
+- Server uses NodeNext module resolution (`.js` extensions in imports).
+- Discriminated unions for type narrowing: `Pane` (by `kind`), `SessionEvent` (by `type`), `InferenceFrame` (by `type`).
+- shadcn primitives live in `components/ui/`. Don't modify them unless adding a new primitive.
+- `inferLanguage()` from `lib/attachments.ts` is the canonical file-extension-to-language map. `CodeBlock.tsx` keeps its own `LANG_MAP` because it also resolves markdown fence names.

apps/server/src/auth.ts

@@ -1,31 +0,0 @@
-import type { FastifyInstance, FastifyRequest } from 'fastify';
-
-declare module 'fastify' {
-  interface FastifyRequest {
-    user?: string;
-  }
-}
-
-const PUBLIC_PATHS = new Set<string>(['/api/health']);
-
-export function registerAuth(app: FastifyInstance): void {
-  app.addHook('onRequest', async (req, reply) => {
-    if (!req.url.startsWith('/api')) return;
-    if (PUBLIC_PATHS.has(req.routeOptions.url ?? req.url.split('?')[0]!)) return;
-
-    const header = req.headers['remote-user'];
-    const user = Array.isArray(header) ? header[0] : header;
-    if (!user || user.trim() === '') {
-      reply.code(401).send({ error: 'unauthenticated' });
-      return reply;
-    }
-    req.user = user.trim();
-  });
-}
-
-export function requireUser(req: FastifyRequest): string {
-  if (!req.user) {
-    throw new Error('user not set on request — auth hook must run first');
-  }
-  return req.user;
-}

apps/server/src/config.ts

@@ -9,6 +9,10 @@ const ConfigSchema = z.object({
   PROJECT_ROOT_WHITELIST: z.string().default('/opt'),
   DEFAULT_MODEL: z.string().default('qwen3.6-35b-a3b-mxfp4'),
   LOG_LEVEL: z.string().default('info'),
+  GITEA_BASE_URL: z.string().url().default('https://git.indifferentketchup.com'),
+  GITEA_USER: z.string().default('indifferentketchup'),
+  GITEA_TOKEN: z.string().optional(),
+  GITEA_SSH_HOST: z.string().default('100.114.205.53:2222'),
 });
 
 export type Config = z.infer<typeof ConfigSchema>;

apps/server/src/index.ts

@@ -5,15 +5,15 @@ import { existsSync } from 'node:fs';
 import { resolve } from 'node:path';
 import { loadConfig } from './config.js';
 import { getSql, applySchema, pingDb, closeDb } from './db.js';
-import { registerAuth } from './auth.js';
+
 import { registerProjectRoutes } from './routes/projects.js';
 import { registerSessionRoutes } from './routes/sessions.js';
 import { registerSettingsRoutes } from './routes/settings.js';
 import { registerMessageRoutes } from './routes/messages.js';
+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 { registerPaneRoutes } from './routes/panes.js';
 import { createInferenceRunner } from './services/inference.js';
 import { createBroker } from './services/broker.js';
 
@@ -24,14 +24,28 @@ async function main() {
     logger: { level: config.LOG_LEVEL },
   });
 
+  // Allow empty JSON bodies on POSTs that don't take a body (archive, unarchive, stop, etc.).
+  // Default Fastify parser throws FST_ERR_CTP_EMPTY_JSON_BODY on empty string.
+  app.removeContentTypeParser(['application/json']);
+  app.addContentTypeParser('application/json', { parseAs: 'string' }, (_req, body, done) => {
+    const str = (body as string) ?? '';
+    if (str.trim().length === 0) {
+      done(null, {});
+      return;
+    }
+    try {
+      done(null, JSON.parse(str));
+    } catch (err) {
+      done(err as Error, undefined);
+    }
+  });
+
   const sql = getSql(config);
   await applySchema(sql);
   app.log.info('database schema applied');
 
   await app.register(fastifyWebsocket);
 
-  registerAuth(app);
-
   app.get('/api/health', async () => {
     const dbOk = await pingDb(sql);
     return { status: dbOk ? 'ok' : 'degraded', db: dbOk };
@@ -44,7 +58,7 @@ async function main() {
   registerSettingsRoutes(app, sql);
   registerModelRoutes(app, config);
   registerSidebarRoutes(app, sql);
-  registerPaneRoutes(app, sql);
+  registerChatRoutes(app, sql, broker);
 
   const inference = createInferenceRunner(
     {
@@ -60,29 +74,40 @@ async function main() {
     }
   );
   registerMessageRoutes(app, sql, {
-    enqueueInference: (sessionId, assistantId, user) => {
-      inference.enqueue(sessionId, assistantId, user);
+    enqueueInference: (sessionId, chatId, assistantId, user) => {
+      inference.enqueue(sessionId, chatId, assistantId, user);
     },
-    publishUserMessage: (sessionId, userMessageId, content) => {
+    enqueueCompact: (sessionId, chatId, compactId, user) => {
+      inference.enqueueCompact(sessionId, chatId, compactId, user);
+    },
+    cancelInference: async (sessionId, chatId) => {
+      return inference.cancel(sessionId, chatId);
+    },
+    hasActiveInference: (chatId) => inference.hasActive(chatId),
+    publishUserMessage: (sessionId, chatId, userMessageId, content) => {
       broker.publish(sessionId, {
         type: 'message_started',
         message_id: userMessageId,
+        chat_id: chatId,
         role: 'user',
       });
       broker.publish(sessionId, {
         type: 'delta',
         message_id: userMessageId,
+        chat_id: chatId,
         content,
       });
       broker.publish(sessionId, {
         type: 'message_complete',
         message_id: userMessageId,
+        chat_id: chatId,
       });
     },
-    publishMessagesDeleted: (sessionId, messageIds) => {
+    publishMessagesDeleted: (sessionId, chatId, messageIds) => {
       broker.publish(sessionId, {
         type: 'messages_deleted',
         message_ids: messageIds,
+        chat_id: chatId,
       });
     },
   });
@@ -120,6 +145,9 @@ async function main() {
   process.on('SIGINT', () => void shutdown('SIGINT'));
   process.on('SIGTERM', () => void shutdown('SIGTERM'));
 
+  // Bound to 0.0.0.0 intentionally. Public access goes through Caddy → Authelia.
+  // Direct Tailscale access (100.114.205.53:9500) is unauthenticated by design;
+  // the threat model treats Tailnet membership as the trust boundary.
   await app.listen({ port: config.PORT, host: config.HOST });
   app.log.info(`boocode server listening on http://${config.HOST}:${config.PORT}`);
 }

apps/server/src/routes/chats.ts

@@ -0,0 +1,279 @@
+import type { FastifyInstance } from 'fastify';
+import { z } from 'zod';
+import type { Sql } from '../db.js';
+import type { Broker } from '../services/broker.js';
+import type { Chat, Message } from '../types/api.js';
+
+const CreateBody = z.object({
+  name: z.string().min(1).max(200).optional(),
+});
+
+const PatchBody = z.object({
+  name: z.string().min(1).max(200),
+});
+
+const ForkBody = z.object({
+  message_id: z.string().uuid(),
+  name: z.string().min(1).max(200).optional(),
+});
+
+export function registerChatRoutes(
+  app: FastifyInstance,
+  sql: Sql,
+  broker: Broker
+): void {
+  app.get<{ Params: { id: string }; Querystring: { status?: string } }>(
+    '/api/sessions/:id/chats',
+    async (req, reply) => {
+      const session = await sql`SELECT id FROM sessions WHERE id = ${req.params.id}`;
+      if (session.length === 0) {
+        reply.code(404);
+        return { error: 'session not found' };
+      }
+      const status = req.query.status === 'archived' ? 'archived' : 'open';
+      // Enriched list: computed per-chat fields via LATERAL joins.
+      const rows = await sql<Chat[]>`
+        SELECT
+          c.id, c.session_id, c.name, c.status, c.created_at, c.updated_at,
+          COALESCE(mc.cnt, 0)::int AS message_count,
+          lp.preview AS last_message_preview,
+          ec.tokens AS effective_context_tokens
+        FROM chats c
+        LEFT JOIN LATERAL (
+          SELECT COUNT(*) AS cnt FROM messages WHERE chat_id = c.id
+        ) mc ON TRUE
+        LEFT JOIN LATERAL (
+          SELECT LEFT(BTRIM(REGEXP_REPLACE(content, E'[\\n\\r]+', ' ', 'g')), 80) AS preview
+          FROM messages
+          WHERE chat_id = c.id AND kind = 'message' AND content <> ''
+          ORDER BY created_at DESC
+          LIMIT 1
+        ) lp ON TRUE
+        LEFT JOIN LATERAL (
+          SELECT ctx_used AS tokens
+          FROM messages
+          WHERE chat_id = c.id AND kind = 'message' AND role = 'assistant'
+            AND status = 'complete' AND ctx_used IS NOT NULL
+          ORDER BY created_at DESC
+          LIMIT 1
+        ) ec ON TRUE
+        WHERE c.session_id = ${req.params.id} AND c.status = ${status}
+        ORDER BY c.updated_at DESC
+      `;
+      return rows;
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/sessions/:id/chats',
+    async (req, reply) => {
+      const parsed = CreateBody.safeParse(req.body ?? {});
+      if (!parsed.success) {
+        reply.code(400);
+        return { error: 'invalid body', details: parsed.error.flatten() };
+      }
+      const session = await sql`SELECT id FROM sessions WHERE id = ${req.params.id}`;
+      if (session.length === 0) {
+        reply.code(404);
+        return { error: 'session not found' };
+      }
+      const [chat] = await sql<Chat[]>`
+        INSERT INTO chats (session_id, name, status)
+        VALUES (${req.params.id}, ${parsed.data.name ?? null}, 'open')
+        RETURNING id, session_id, name, status, created_at, updated_at
+      `;
+      broker.publishUser('default', {
+        type: 'chat_created',
+        chat: chat!,
+        session_id: req.params.id,
+      });
+      reply.code(201);
+      return chat;
+    }
+  );
+
+  app.patch<{ Params: { id: string } }>(
+    '/api/chats/:id',
+    async (req, reply) => {
+      const parsed = PatchBody.safeParse(req.body ?? {});
+      if (!parsed.success) {
+        reply.code(400);
+        return { error: 'invalid body', details: parsed.error.flatten() };
+      }
+      const rows = await sql<Chat[]>`
+        UPDATE chats
+        SET name = ${parsed.data.name},
+            updated_at = clock_timestamp()
+        WHERE id = ${req.params.id}
+        RETURNING id, session_id, name, status, created_at, updated_at
+      `;
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const chat = rows[0]!;
+      broker.publishUser('default', {
+        type: 'chat_updated',
+        chat_id: chat.id,
+        session_id: chat.session_id,
+        name: chat.name,
+        updated_at: chat.updated_at,
+      });
+      return chat;
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/chats/:id/archive',
+    async (req, reply) => {
+      const rows = await sql<{ id: string; session_id: string }[]>`
+        UPDATE chats SET status = 'archived', updated_at = clock_timestamp()
+        WHERE id = ${req.params.id} AND status = 'open'
+        RETURNING id, session_id
+      `;
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found or already archived' };
+      }
+      const row = rows[0]!;
+      broker.publishUser('default', {
+        type: 'chat_archived',
+        chat_id: row.id,
+        session_id: row.session_id,
+      });
+      reply.code(204);
+      return null;
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/chats/:id/unarchive',
+    async (req, reply) => {
+      const rows = await sql<Chat[]>`
+        UPDATE chats SET status = 'open', updated_at = clock_timestamp()
+        WHERE id = ${req.params.id} AND status = 'archived'
+        RETURNING id, session_id, name, status, created_at, updated_at
+      `;
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found or not archived' };
+      }
+      const chat = rows[0]!;
+      broker.publishUser('default', { type: 'chat_unarchived', chat });
+      return chat;
+    }
+  );
+
+  app.delete<{ Params: { id: string } }>(
+    '/api/chats/:id',
+    async (req, reply) => {
+      const result = await sql<{ id: string; session_id: string }[]>`
+        DELETE FROM chats WHERE id = ${req.params.id}
+        RETURNING id, session_id
+      `;
+      if (result.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const row = result[0]!;
+      broker.publishUser('default', {
+        type: 'chat_deleted',
+        chat_id: row.id,
+        session_id: row.session_id,
+      });
+      reply.code(204);
+      return null;
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/chats/:id/fork',
+    async (req, reply) => {
+      const parsed = ForkBody.safeParse(req.body ?? {});
+      if (!parsed.success) {
+        reply.code(400);
+        return { error: 'invalid body', details: parsed.error.flatten() };
+      }
+
+      const sourceRows = await sql<Chat[]>`
+        SELECT id, session_id, name, status, created_at, updated_at
+        FROM chats WHERE id = ${req.params.id}
+      `;
+      if (sourceRows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const source = sourceRows[0]!;
+
+      const targetRows = await sql<{ created_at: string; status: string }[]>`
+        SELECT created_at, status FROM messages
+        WHERE chat_id = ${source.id} AND id = ${parsed.data.message_id}
+      `;
+      if (targetRows.length === 0) {
+        reply.code(404);
+        return { error: 'message not found in chat' };
+      }
+      const target = targetRows[0]!;
+      if (target.status !== 'complete') {
+        reply.code(400);
+        return { error: 'can only fork from completed messages' };
+      }
+
+      const newName = parsed.data.name ?? `${source.name ?? 'Chat'} (fork)`;
+
+      const newChat = await sql.begin(async (tx) => {
+        const [chat] = await tx<Chat[]>`
+          INSERT INTO chats (session_id, name, status)
+          VALUES (${source.session_id}, ${newName}, 'open')
+          RETURNING id, session_id, name, status, created_at, updated_at
+        `;
+        await tx`
+          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
+          )
+          SELECT
+            ${source.session_id}, ${chat!.id}, role, content, kind,
+            tool_calls, tool_results, status,
+            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'
+            )
+          FROM messages
+          WHERE chat_id = ${source.id}
+            AND created_at <= ${target.created_at}::timestamptz
+            AND status = 'complete'
+        `;
+        return chat!;
+      });
+
+      broker.publishUser('default', {
+        type: 'chat_created',
+        chat: newChat,
+        session_id: source.session_id,
+      });
+      reply.code(201);
+      return newChat;
+    }
+  );
+
+  app.get<{ Params: { id: string } }>(
+    '/api/chats/:id/messages',
+    async (req, reply) => {
+      const chat = await sql`SELECT id FROM chats WHERE id = ${req.params.id}`;
+      if (chat.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      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
+        FROM messages
+        WHERE chat_id = ${req.params.id}
+        ORDER BY created_at ASC, id ASC
+      `;
+      return rows;
+    }
+  );
+}

apps/server/src/routes/messages.ts

@@ -1,21 +1,24 @@
 import type { FastifyInstance } from 'fastify';
 import { z } from 'zod';
 import type { Sql } from '../db.js';
-import type { Message, Session } from '../types/api.js';
-import { requireUser } from '../auth.js';
+import type { Chat, Message, Session } from '../types/api.js';
 
 const SendBody = z.object({
   content: z.string().min(1).max(64_000),
 });
 
 interface MessageHandlers {
-  enqueueInference: (sessionId: string, assistantMessageId: string, user: string) => void;
+  enqueueInference: (sessionId: string, chatId: string, assistantMessageId: string, user: string) => void;
+  enqueueCompact: (sessionId: string, chatId: string, compactMessageId: string, user: string) => void;
   publishUserMessage: (
     sessionId: string,
+    chatId: string,
     userMessageId: string,
     content: string
   ) => void;
-  publishMessagesDeleted: (sessionId: string, messageIds: string[]) => void;
+  publishMessagesDeleted: (sessionId: string, chatId: string, messageIds: string[]) => void;
+  cancelInference: (sessionId: string, chatId: string) => Promise<boolean>;
+  hasActiveInference: (chatId: string) => boolean;
 }
 
 export function registerMessageRoutes(
@@ -32,7 +35,7 @@ export function registerMessageRoutes(
         return { error: 'session not found' };
       }
       const rows = await sql<Message[]>`
-        SELECT id, session_id, role, content, tool_calls, tool_results, status, last_seq,
+        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
         FROM messages
         WHERE session_id = ${req.params.id}
@@ -43,7 +46,7 @@ export function registerMessageRoutes(
   );
 
   app.post<{ Params: { id: string } }>(
-    '/api/sessions/:id/messages',
+    '/api/chats/:id/messages',
     async (req, reply) => {
       const parsed = SendBody.safeParse(req.body);
       if (!parsed.success) {
@@ -51,33 +54,39 @@ export function registerMessageRoutes(
         return { error: 'invalid body', details: parsed.error.flatten() };
       }
 
-      const session = await sql<Session[]>`SELECT id FROM sessions WHERE id = ${req.params.id}`;
-      if (session.length === 0) {
+      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: 'session not found' };
+        return { error: 'chat not found' };
       }
+      const chat = chatRows[0]!;
+      const sessionId = chat.session_id;
 
       const result = await sql.begin(async (tx) => {
         const [userMsg] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, role, content, status, created_at)
-          VALUES (${req.params.id}, 'user', ${parsed.data.content}, 'complete', clock_timestamp())
+          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+          VALUES (${sessionId}, ${chat.id}, 'user', ${parsed.data.content}, 'complete', clock_timestamp())
           RETURNING id
         `;
         const [assistantMsg] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, role, content, status, created_at)
-          VALUES (${req.params.id}, 'assistant', '', 'streaming', clock_timestamp())
+          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 = NOW() WHERE id = ${req.params.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 { user_message_id: userMsg!.id, assistant_message_id: assistantMsg!.id };
       });
 
       handlers.publishUserMessage(
-        req.params.id,
+        sessionId,
+        chat.id,
         result.user_message_id,
         parsed.data.content
       );
-      handlers.enqueueInference(req.params.id, result.assistant_message_id, requireUser(req));
+      handlers.enqueueInference(sessionId, chat.id, result.assistant_message_id, 'default');
 
       reply.code(202);
       return result;
@@ -85,14 +94,24 @@ export function registerMessageRoutes(
   );
 
   app.post<{ Params: { id: string; message_id: string } }>(
-    '/api/sessions/:id/messages/:message_id/regenerate',
+    '/api/chats/:id/messages/:message_id/regenerate',
     async (req, reply) => {
-      const { id: sessionId, message_id: targetId } = req.params;
+      const { id: chatId, message_id: targetId } = req.params;
+
+      const chatRows = await sql<Chat[]>`
+        SELECT id, session_id FROM chats WHERE id = ${chatId}
+      `;
+      if (chatRows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const chat = chatRows[0]!;
+      const sessionId = chat.session_id;
 
       const target = await sql<{ id: string; role: string; status: string }[]>`
         SELECT id, role, status
         FROM messages
-        WHERE session_id = ${sessionId} AND id = ${targetId}
+        WHERE chat_id = ${chatId} AND id = ${targetId}
       `;
       if (target.length === 0) {
         reply.code(404);
@@ -109,34 +128,188 @@ export function registerMessageRoutes(
       }
 
       const { newAssistantId, deletedIds } = await sql.begin(async (tx) => {
-        // Subquery keeps created_at in postgres at TIMESTAMPTZ µs precision.
-        // Round-tripping through JS Date loses sub-ms precision and can pull
-        // earlier rows (e.g. the triggering user message) into the >= bound.
         const deletedRows = await tx<{ id: string }[]>`
           DELETE FROM messages
-          WHERE session_id = ${sessionId}
+          WHERE chat_id = ${chatId}
             AND created_at >= (
               SELECT created_at FROM messages WHERE id = ${targetId}
             )
           RETURNING id
         `;
         const [row] = await tx<{ id: string }[]>`
-          INSERT INTO messages (session_id, role, content, status, created_at)
-          VALUES (${sessionId}, 'assistant', '', 'streaming', clock_timestamp())
+          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+          VALUES (${sessionId}, ${chatId}, 'assistant', '', 'streaming', clock_timestamp())
           RETURNING id
         `;
-        await tx`UPDATE sessions SET updated_at = NOW() WHERE id = ${sessionId}`;
+        await tx`UPDATE sessions SET updated_at = clock_timestamp() WHERE id = ${sessionId}`;
+        await tx`UPDATE chats SET updated_at = clock_timestamp() WHERE id = ${chatId}`;
         return {
           newAssistantId: row!.id,
           deletedIds: deletedRows.map((r) => r.id),
         };
       });
 
-      handlers.publishMessagesDeleted(sessionId, deletedIds);
-      handlers.enqueueInference(sessionId, newAssistantId, requireUser(req));
+      handlers.publishMessagesDeleted(sessionId, chatId, deletedIds);
+      handlers.enqueueInference(sessionId, chatId, newAssistantId, 'default');
 
       reply.code(202);
       return { assistant_message_id: newAssistantId };
     }
   );
+
+  app.delete<{ Params: { id: string; message_id: string } }>(
+    '/api/chats/:id/messages/:message_id',
+    async (req, reply) => {
+      const { id: chatId, message_id: messageId } = req.params;
+
+      const chatRows = await sql<Chat[]>`
+        SELECT id, session_id FROM chats WHERE id = ${chatId}
+      `;
+      if (chatRows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const chat = chatRows[0]!;
+
+      if (handlers.hasActiveInference(chatId)) {
+        reply.code(409);
+        return { error: 'chat is currently streaming; stop it first' };
+      }
+
+      const deletedIds = await sql.begin(async (tx) => {
+        const deletedRows = await tx<{ id: string }[]>`
+          DELETE FROM messages
+          WHERE chat_id = ${chatId}
+            AND created_at >= (
+              SELECT created_at FROM messages
+              WHERE id = ${messageId} AND chat_id = ${chatId}
+            )
+          RETURNING id
+        `;
+        if (deletedRows.length > 0) {
+          await tx`UPDATE chats SET updated_at = clock_timestamp() WHERE id = ${chatId}`;
+        }
+        return deletedRows.map((r) => r.id);
+      });
+
+      if (deletedIds.length === 0) {
+        reply.code(404);
+        return { error: 'message not found' };
+      }
+
+      handlers.publishMessagesDeleted(chat.session_id, chatId, deletedIds);
+
+      reply.code(204);
+      return null;
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/chats/:id/compact',
+    async (req, reply) => {
+      const chatRows = await sql<Chat[]>`
+        SELECT id, session_id FROM chats WHERE id = ${req.params.id} AND status = 'open'
+      `;
+      if (chatRows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const chat = chatRows[0]!;
+      const sessionId = chat.session_id;
+
+      const [compactMsg] = await sql<{ id: string }[]>`
+        INSERT INTO messages (session_id, chat_id, role, content, kind, status, created_at)
+        VALUES (${sessionId}, ${chat.id}, 'system', '', 'compact', 'streaming', clock_timestamp())
+        RETURNING id
+      `;
+
+      handlers.enqueueCompact(sessionId, chat.id, compactMsg!.id, 'default');
+
+      reply.code(202);
+      return { compact_message_id: compactMsg!.id };
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/chats/:id/stop',
+    async (req, reply) => {
+      const chatRows = await sql<Chat[]>`
+        SELECT id, session_id FROM chats WHERE id = ${req.params.id}
+      `;
+      if (chatRows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const chat = chatRows[0]!;
+
+      const cancelled = await handlers.cancelInference(chat.session_id, chat.id);
+      if (!cancelled) {
+        reply.code(409);
+        return { error: 'no active generation to stop' };
+      }
+
+      reply.code(200);
+      return { stopped: true };
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/chats/:id/force_send',
+    async (req, reply) => {
+      const parsed = SendBody.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 = ${req.params.id} AND status = 'open'
+      `;
+      if (chatRows.length === 0) {
+        reply.code(404);
+        return { error: 'chat not found' };
+      }
+      const chat = chatRows[0]!;
+      const sessionId = chat.session_id;
+
+      // Await actual cancellation completion (catch block persists state).
+      // 5s timeout guards against llama-swap stalls; if hit, proceed anyway.
+      await Promise.race([
+        handlers.cancelInference(sessionId, chat.id).then(() => undefined),
+        new Promise<void>((_, rej) =>
+          setTimeout(() => rej(new Error('cancel-timeout')), 5000)
+        ),
+      ]).catch((e: Error) => {
+        if (e.message !== 'cancel-timeout') throw e;
+        req.log.warn({ chatId: chat.id }, 'cancel timeout exceeded, proceeding with force-send');
+      });
+
+      const result = await sql.begin(async (tx) => {
+        const [userMsg] = await tx<{ id: string }[]>`
+          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+          VALUES (${sessionId}, ${chat.id}, 'user', ${parsed.data.content}, 'complete', clock_timestamp())
+          RETURNING id
+        `;
+        const [assistantMsg] = await tx<{ id: string }[]>`
+          INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+          VALUES (${sessionId}, ${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 { user_message_id: userMsg!.id, assistant_message_id: assistantMsg!.id };
+      });
+
+      handlers.publishUserMessage(
+        sessionId,
+        chat.id,
+        result.user_message_id,
+        parsed.data.content
+      );
+      handlers.enqueueInference(sessionId, chat.id, result.assistant_message_id, 'default');
+
+      reply.code(202);
+      return result;
+    }
+  );
 }

apps/server/src/routes/panes.ts

@@ -1,217 +0,0 @@
-import type { FastifyInstance } from 'fastify';
-import type { TransactionSql } from 'postgres';
-import type { Sql } from '../db.js';
-import type { Pane, PaneCreateRequest, PaneUpdateRequest } from '../types/api.js';
-
-const VALID_KINDS = new Set(['chat', 'file_browser']);
-const MAX_PANES = 5;
-
-async function movePane(
-  tx: TransactionSql,
-  paneId: string,
-  sid: string,
-  oldPos: number,
-  newPos: number
-): Promise<void> {
-  if (oldPos === newPos) return;
-  // Move target pane to a sentinel well outside the negate range [-MAX_PANES, -1]
-  // so it never collides with negated rows during the shift steps.
-  await tx`UPDATE session_panes SET position = -100 WHERE id = ${paneId}`;
-  if (newPos > oldPos) {
-    await tx`UPDATE session_panes SET position = -position
-              WHERE session_id = ${sid} AND position > ${oldPos} AND position <= ${newPos}`;
-    await tx`UPDATE session_panes SET position = -position - 1
-              WHERE session_id = ${sid} AND position < 0 AND id != ${paneId}`;
-  } else {
-    await tx`UPDATE session_panes SET position = -position - 2
-              WHERE session_id = ${sid} AND position >= ${newPos} AND position < ${oldPos}`;
-    await tx`UPDATE session_panes SET position = -position - 1
-              WHERE session_id = ${sid} AND position < 0 AND id != ${paneId}`;
-  }
-  await tx`UPDATE session_panes SET position = ${newPos} WHERE id = ${paneId}`;
-}
-
-export function registerPaneRoutes(app: FastifyInstance, sql: Sql): void {
-  // GET /api/sessions/:id/panes — list panes ordered by position ASC
-  app.get<{ Params: { id: string } }>(
-    '/api/sessions/:id/panes',
-    async (req, reply) => {
-      const sessionRows = await sql`SELECT id FROM sessions WHERE id = ${req.params.id}`;
-      if (sessionRows.length === 0) {
-        reply.code(404);
-        return { error: 'session not found' };
-      }
-      const panes = await sql<Pane[]>`
-        SELECT id, session_id, position, kind, state, created_at
-        FROM session_panes
-        WHERE session_id = ${req.params.id}
-        ORDER BY position ASC
-      `;
-      return { panes };
-    }
-  );
-
-  // POST /api/sessions/:id/panes — create a new pane
-  app.post<{ Params: { id: string } }>(
-    '/api/sessions/:id/panes',
-    async (req, reply) => {
-      const body = (req.body ?? {}) as PaneCreateRequest;
-      const { kind, position } = body;
-
-      if (!kind || !VALID_KINDS.has(kind)) {
-        reply.code(400);
-        return { error: 'kind must be "chat" or "file_browser"' };
-      }
-
-      const sessionRows = await sql`SELECT id FROM sessions WHERE id = ${req.params.id}`;
-      if (sessionRows.length === 0) {
-        reply.code(404);
-        return { error: 'session not found' };
-      }
-
-      const sid = req.params.id;
-      const state = {};
-
-      let insertError: string | null = null;
-      const inserted = await sql.begin(async (tx) => {
-        const countResult = await tx<{ n: number }[]>`
-          SELECT COUNT(*)::int AS n FROM session_panes WHERE session_id = ${sid}
-        `;
-        const n = countResult[0]!.n;
-        if (n >= MAX_PANES) {
-          throw new Error('MAX_PANES_EXCEEDED');
-        }
-        let insertPos: number;
-        if (position === undefined || position === null) {
-          insertPos = n;
-        } else {
-          if (position < 0 || position > n) {
-            throw new Error('OUT_OF_BOUNDS');
-          }
-          insertPos = position;
-        }
-        await tx`UPDATE session_panes SET position = -position - 1
-                  WHERE session_id = ${sid} AND position >= ${insertPos}`;
-        const [row] = await tx<Pane[]>`
-          INSERT INTO session_panes (session_id, position, kind, state)
-          VALUES (${sid}, ${insertPos}, ${kind}, ${JSON.stringify(state)}::jsonb)
-          RETURNING id, session_id, position, kind, state, created_at
-        `;
-        await tx`UPDATE session_panes SET position = -position
-                  WHERE session_id = ${sid} AND position < 0`;
-        return row;
-      }).catch((err: Error) => {
-        insertError = err.message;
-        return null;
-      });
-
-      if (insertError === 'MAX_PANES_EXCEEDED') {
-        reply.code(400);
-        return { error: `session already has ${MAX_PANES} panes (maximum)` };
-      }
-      if (insertError === 'OUT_OF_BOUNDS') {
-        reply.code(400);
-        return { error: `position out of bounds` };
-      }
-      if (insertError) {
-        reply.code(500);
-        return { error: 'internal error' };
-      }
-
-      reply.code(201);
-      return inserted as Pane;
-    }
-  );
-
-  // PATCH /api/panes/:id — update state and/or position
-  app.patch<{ Params: { id: string } }>(
-    '/api/panes/:id',
-    async (req, reply) => {
-      const body = (req.body ?? {}) as PaneUpdateRequest;
-      const { state, position } = body;
-
-      if (state === undefined && position === undefined) {
-        reply.code(400);
-        return { error: 'must provide at least one of: state, position' };
-      }
-
-      const paneRows = await sql<Pane[]>`
-        SELECT id, session_id, position, kind, state, created_at
-        FROM session_panes WHERE id = ${req.params.id}
-      `;
-      if (paneRows.length === 0) {
-        reply.code(404);
-        return { error: 'pane not found' };
-      }
-      const pane = paneRows[0]!;
-      const sid = pane.session_id;
-      const oldPos = pane.position;
-
-      // Apply position and/or state changes atomically
-      let patchError: string | null = null;
-      await sql.begin(async (tx) => {
-        if (position !== undefined) {
-          const countRows = await tx<{ n: number }[]>`
-            SELECT COUNT(*)::int AS n FROM session_panes WHERE session_id = ${sid}
-          `;
-          const count = countRows[0]?.n ?? 0;
-          if (position < 0 || position >= count) {
-            throw `position must be between 0 and ${count - 1}`;
-          }
-        }
-        if (position !== undefined && position !== oldPos) {
-          await movePane(tx, req.params.id, sid, oldPos, position);
-        }
-        if (state !== undefined) {
-          await tx`
-            UPDATE session_panes SET state = ${JSON.stringify(state)}::jsonb
-            WHERE id = ${req.params.id}
-          `;
-        }
-      }).catch((err: unknown) => {
-        if (typeof err === 'string') {
-          patchError = err;
-        } else {
-          throw err;
-        }
-      });
-
-      if (patchError !== null) {
-        reply.code(400);
-        return { error: patchError };
-      }
-
-      const [updated] = await sql<Pane[]>`
-        SELECT id, session_id, position, kind, state, created_at
-        FROM session_panes WHERE id = ${req.params.id}
-      `;
-      return updated as Pane;
-    }
-  );
-
-  // DELETE /api/panes/:id — delete a pane, shift remaining down
-  app.delete<{ Params: { id: string } }>(
-    '/api/panes/:id',
-    async (req, reply) => {
-      const paneRows = await sql<{ id: string; session_id: string; position: number }[]>`
-        SELECT id, session_id, position FROM session_panes WHERE id = ${req.params.id}
-      `;
-      if (paneRows.length === 0) {
-        reply.code(404);
-        return { error: 'pane not found' };
-      }
-      const { session_id: sid, position: P } = paneRows[0]!;
-
-      await sql.begin(async (tx) => {
-        await tx`DELETE FROM session_panes WHERE id = ${req.params.id}`;
-        await tx`UPDATE session_panes SET position = -position
-                  WHERE session_id = ${sid} AND position > ${P}`;
-        await tx`UPDATE session_panes SET position = -position - 1
-                  WHERE session_id = ${sid} AND position < 0`;
-      });
-
-      reply.code(204);
-      return null;
-    }
-  );
-}

apps/server/src/routes/projects.ts

@@ -6,16 +6,32 @@ import type { Sql } from '../db.js';
 import type { Config } from '../config.js';
 import type { Broker } from '../services/broker.js';
 import type { Project, AvailableProject } from '../types/api.js';
-import { requireUser } from '../auth.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 {
+  bootstrapProject,
+  BootstrapNameError,
+  BootstrapCollisionError,
+  BootstrapPathError,
+} from '../services/project_bootstrap.js';
 
 const AddProjectBody = z.object({
   path: z.string().min(1),
   name: z.string().min(1).optional(),
 });
 
+const PatchProjectBody = z.object({
+  name: z.string().min(1).max(200),
+});
+
+const CreateProjectBody = z.object({
+  name: z.string().min(1).max(64),
+  commit_message: z.string().min(1).max(200).optional(),
+  visibility: z.enum(['private', 'public']).optional(),
+  create_gitea_remote: z.boolean().optional(),
+});
+
 async function isDir(path: string): Promise<boolean> {
   try {
     const s = await stat(path);
@@ -50,15 +66,83 @@ export function registerProjectRoutes(
   config: Config,
   broker: Broker
 ): void {
-  app.get('/api/projects', async () => {
+  app.get<{ Querystring: { status?: string } }>('/api/projects', async (req) => {
+    const status = req.query.status === 'archived' ? 'archived' : 'open';
     const rows = await sql<Project[]>`
-      SELECT id, name, path, added_at, last_session_id
+      SELECT id, name, path, added_at, last_session_id, status, gitea_remote
       FROM projects
+      WHERE status = ${status}
       ORDER BY added_at DESC
     `;
     return rows;
   });
 
+  app.post('/api/projects/create', async (req, reply) => {
+    const parsed = CreateProjectBody.safeParse(req.body);
+    if (!parsed.success) {
+      reply.code(400);
+      return { error: 'invalid body', details: parsed.error.flatten() };
+    }
+    const visibility = parsed.data.visibility ?? 'private';
+    const createRemote = parsed.data.create_gitea_remote ?? true;
+    const commitMessage = parsed.data.commit_message ?? 'Initial commit';
+
+    let bootstrap;
+    try {
+      bootstrap = await bootstrapProject(config, app.log, {
+        name: parsed.data.name,
+        commitMessage,
+        visibility,
+        createGiteaRemote: createRemote,
+      });
+    } catch (err) {
+      if (err instanceof BootstrapNameError) {
+        reply.code(400);
+        return { error: `invalid project name: ${err.message}` };
+      }
+      if (err instanceof BootstrapCollisionError) {
+        reply.code(409);
+        return { error: err.message };
+      }
+      if (err instanceof BootstrapPathError) {
+        reply.code(400);
+        return { error: err.message };
+      }
+      app.log.error({ err }, 'bootstrap failed');
+      reply.code(500);
+      return { error: err instanceof Error ? err.message : 'bootstrap failed' };
+    }
+
+    // Insert into projects table only after bootstrap succeeded.
+    try {
+      const [row] = await sql<Project[]>`
+        INSERT INTO projects (name, path, gitea_remote)
+        VALUES (${parsed.data.name}, ${bootstrap.folder_real_path}, ${bootstrap.gitea_remote_url})
+        RETURNING id, name, path, added_at, last_session_id, status, gitea_remote
+      `;
+      broker.publishUser('default', { type: 'project_created', project: row as unknown as Project });
+      reply.code(201);
+      return {
+        project: row,
+        bootstrap: {
+          folder_created: bootstrap.folder_created,
+          git_initialized: bootstrap.git_initialized,
+          first_commit: bootstrap.first_commit,
+          gitea_remote_created: bootstrap.gitea_remote_created,
+          gitea_pushed: bootstrap.gitea_pushed,
+          warnings: bootstrap.warnings,
+        },
+      };
+    } catch (err) {
+      app.log.error({ err, folder: bootstrap.folder_real_path }, 'project insert failed after bootstrap');
+      reply.code(500);
+      return {
+        error: 'project created on disk but DB insert failed',
+        folder: bootstrap.folder_real_path,
+      };
+    }
+  });
+
   app.post('/api/projects', async (req, reply) => {
     const parsed = AddProjectBody.safeParse(req.body);
     if (!parsed.success) {
@@ -71,22 +155,88 @@ export function registerProjectRoutes(
       return { error: resolved.error };
     }
     const name = parsed.data.name?.trim() || resolved.name;
-    try {
-      const [row] = await sql<Project[]>`
-        INSERT INTO projects (name, path)
-        VALUES (${name}, ${resolved.real})
-        RETURNING id, name, path, added_at, last_session_id
-      `;
-      broker.publishUser(requireUser(req), { type: 'project_created', project: row as unknown as Project });
-      reply.code(201);
-      return row;
-    } catch (err) {
-      if (err instanceof Error && err.message.includes('duplicate key')) {
-        reply.code(409);
-        return { error: 'project already exists' };
-      }
-      throw err;
+
+    // Pre-check the current row (if any) so we can distinguish three cases:
+    //   - no row            → INSERT fresh, 201, project_created
+    //   - row archived      → ON CONFLICT UPDATE flips to 'open', 200, project_unarchived
+    //   - row already open  → 409 (true duplicate)
+    const existing = await sql<{ status: string }[]>`
+      SELECT status FROM projects WHERE path = ${resolved.real}
+    `;
+    if (existing.length > 0 && existing[0]!.status === 'open') {
+      reply.code(409);
+      return { error: 'project already exists' };
     }
+
+    const [row] = await sql<Project[]>`
+      INSERT INTO projects (name, path)
+      VALUES (${name}, ${resolved.real})
+      ON CONFLICT (path) DO UPDATE SET status = 'open'
+      RETURNING id, name, path, added_at, last_session_id, status, gitea_remote
+    `;
+
+    if (existing.length === 0) {
+      broker.publishUser('default', { type: 'project_created', project: row as unknown as Project });
+      reply.code(201);
+    } else {
+      // existing.status was 'archived' — row has been restored.
+      broker.publishUser('default', { type: 'project_unarchived', project: row as unknown as Project });
+      reply.code(200);
+    }
+    return row;
+  });
+
+  app.patch<{ Params: { id: string } }>('/api/projects/:id', async (req, reply) => {
+    const parsed = PatchProjectBody.safeParse(req.body);
+    if (!parsed.success) {
+      reply.code(400);
+      return { error: 'invalid body', details: parsed.error.flatten() };
+    }
+    const rows = await sql<Project[]>`
+      UPDATE projects SET name = ${parsed.data.name}
+      WHERE id = ${req.params.id}
+      RETURNING id, name, path, added_at, last_session_id, status, gitea_remote
+    `;
+    if (rows.length === 0) {
+      reply.code(404);
+      return { error: 'not found' };
+    }
+    const project = rows[0]!;
+    broker.publishUser('default', {
+      type: 'project_updated',
+      project_id: project.id,
+      name: project.name,
+    });
+    return project;
+  });
+
+  app.post<{ Params: { id: string } }>('/api/projects/:id/archive', async (req, reply) => {
+    const result = await sql`
+      UPDATE projects SET status = 'archived'
+      WHERE id = ${req.params.id} AND status = 'open'
+    `;
+    if (result.count === 0) {
+      reply.code(404);
+      return { error: 'not found or already archived' };
+    }
+    broker.publishUser('default', { type: 'project_archived', project_id: req.params.id });
+    reply.code(204);
+    return null;
+  });
+
+  app.post<{ Params: { id: string } }>('/api/projects/:id/unarchive', async (req, reply) => {
+    const rows = await sql<Project[]>`
+      UPDATE projects SET status = 'open'
+      WHERE id = ${req.params.id} AND status = 'archived'
+      RETURNING id, name, path, added_at, last_session_id, status, gitea_remote
+    `;
+    if (rows.length === 0) {
+      reply.code(404);
+      return { error: 'not found or not archived' };
+    }
+    const project = rows[0]!;
+    broker.publishUser('default', { type: 'project_unarchived', project });
+    return project;
   });
 
   app.delete<{ Params: { id: string } }>('/api/projects/:id', async (req, reply) => {
@@ -96,7 +246,7 @@ export function registerProjectRoutes(
       reply.code(404);
       return { error: 'not found' };
     }
-    broker.publishUser(requireUser(req), { type: 'project_deleted', project_id: id });
+    broker.publishUser('default', { type: 'project_deleted', project_id: id });
     reply.code(204);
     return null;
   });
@@ -110,7 +260,12 @@ export function registerProjectRoutes(
       return [] as AvailableProject[];
     }
 
-    const existing = await sql<{ path: string }[]>`SELECT path FROM projects`;
+    // Only exclude paths registered with status='open'. Archived projects'
+    // folders should reappear as available so re-add via the picker restores
+    // the existing row (see POST /api/projects ON CONFLICT below).
+    const existing = await sql<{ path: string }[]>`
+      SELECT path FROM projects WHERE status = 'open'
+    `;
     const existingSet = new Set(existing.map((r) => r.path));
 
     const out: AvailableProject[] = [];
@@ -144,7 +299,7 @@ export function registerProjectRoutes(
       const relPath = req.query.path ?? '.';
 
       const rows = await sql<Project[]>`
-        SELECT id, name, path, added_at, last_session_id
+        SELECT id, name, path, added_at, last_session_id, status, gitea_remote
         FROM projects WHERE id = ${id}
       `;
       if (rows.length === 0) {
@@ -189,7 +344,7 @@ export function registerProjectRoutes(
       }
 
       const rows = await sql<Project[]>`
-        SELECT id, name, path, added_at, last_session_id
+        SELECT id, name, path, added_at, last_session_id, status, gitea_remote
         FROM projects WHERE id = ${id}
       `;
       if (rows.length === 0) {
@@ -233,7 +388,7 @@ export function registerProjectRoutes(
       const { id } = req.params;
 
       const rows = await sql<Project[]>`
-        SELECT id, name, path, added_at, last_session_id
+        SELECT id, name, path, added_at, last_session_id, status, gitea_remote
         FROM projects WHERE id = ${id}
       `;
       if (rows.length === 0) {

apps/server/src/routes/sessions.ts

@@ -5,7 +5,6 @@ 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 { requireUser } from '../auth.js';
 
 const CreateBody = z.object({
   name: z.string().min(1).max(200).optional(),
@@ -31,7 +30,7 @@ export function registerSessionRoutes(
   config: Config,
   broker: Broker
 ): void {
-  app.get<{ Params: { id: string } }>(
+  app.get<{ Params: { id: string }; Querystring: { status?: string } }>(
     '/api/projects/:id/sessions',
     async (req, reply) => {
       const project = await sql`SELECT id FROM projects WHERE id = ${req.params.id}`;
@@ -39,10 +38,11 @@ export function registerSessionRoutes(
         reply.code(404);
         return { error: 'project not found' };
       }
+      const status = req.query.status === 'archived' ? 'archived' : 'open';
       const rows = await sql<Session[]>`
-        SELECT id, project_id, name, model, system_prompt, created_at, updated_at
+        SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at
         FROM sessions
-        WHERE project_id = ${req.params.id}
+        WHERE project_id = ${req.params.id} AND status = ${status}
         ORDER BY updated_at DESC
       `;
       return rows;
@@ -81,15 +81,15 @@ export function registerSessionRoutes(
         const [session] = await tx<Session[]>`
           INSERT INTO sessions (project_id, name, model, system_prompt)
           VALUES (${req.params.id}, ${name}, ${model}, ${systemPrompt})
-          RETURNING id, project_id, name, model, system_prompt, created_at, updated_at
+          RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
         `;
         await tx`
-          INSERT INTO session_panes (session_id, position, kind, state)
-          VALUES (${session!.id}, 0, 'chat', '{}'::jsonb)
+          INSERT INTO chats (session_id, name, status)
+          VALUES (${session!.id}, NULL, 'open')
         `;
         return session!;
       });
-      broker.publishUser(requireUser(req), {
+      broker.publishUser('default', {
         type: 'session_created',
         session: row,
         project_id: row.project_id,
@@ -101,7 +101,7 @@ 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, created_at, updated_at
+      SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at
       FROM sessions WHERE id = ${req.params.id}
     `;
     if (rows.length === 0) {
@@ -128,13 +128,66 @@ export function registerSessionRoutes(
           system_prompt = COALESCE(${system_prompt ?? null}, system_prompt),
           updated_at = clock_timestamp()
         WHERE id = ${req.params.id}
-        RETURNING id, project_id, name, model, system_prompt, created_at, updated_at
+        RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
       `;
       if (rows.length === 0) {
         reply.code(404);
         return { error: 'session not found' };
       }
-      return rows[0];
+      const session = rows[0]!;
+      if (name !== undefined) {
+        broker.publishUser('default', {
+          type: 'session_renamed',
+          session_id: session.id,
+          name: session.name,
+        });
+      }
+      return session;
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/sessions/:id/archive',
+    async (req, reply) => {
+      const rows = await sql<{ id: string; project_id: string }[]>`
+        UPDATE sessions SET status = 'archived', updated_at = clock_timestamp()
+        WHERE id = ${req.params.id} AND status = 'open'
+        RETURNING id, project_id
+      `;
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'session not found or already archived' };
+      }
+      broker.publishUser('default', {
+        type: 'session_archived',
+        session_id: rows[0]!.id,
+        project_id: rows[0]!.project_id,
+      });
+      reply.code(204);
+      return null;
+    }
+  );
+
+  app.post<{ Params: { id: string } }>(
+    '/api/sessions/:id/unarchive',
+    async (req, reply) => {
+      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
+      `;
+      if (rows.length === 0) {
+        reply.code(404);
+        return { error: 'session not found or not archived' };
+      }
+      const session = rows[0]!;
+      broker.publishUser('default', {
+        type: 'session_created',
+        session: session,
+        project_id: session.project_id,
+      });
+      reply.code(200);
+      return session;
     }
   );
 
@@ -150,7 +203,7 @@ export function registerSessionRoutes(
         return { error: 'not found' };
       }
       const project_id = deleted[0]!.project_id;
-      broker.publishUser(requireUser(req), { type: 'session_deleted', session_id: id, project_id });
+      broker.publishUser('default', { type: 'session_deleted', session_id: id, project_id });
       reply.code(204);
       return null;
     }

apps/server/src/routes/sidebar.ts

@@ -8,9 +8,10 @@ import type {
 
 export function registerSidebarRoutes(app: FastifyInstance, sql: Sql): void {
   app.get('/api/sidebar', async (): Promise<SidebarResponse> => {
-    const projects = await sql<{ id: string; name: string }[]>`
-      SELECT id, name
+    const projects = await sql<{ id: string; name: string; path: string; gitea_remote: string | null }[]>`
+      SELECT id, name, path, gitea_remote
       FROM projects
+      WHERE status = 'open'
       ORDER BY added_at DESC
     `;
 
@@ -20,19 +21,21 @@ export function registerSidebarRoutes(app: FastifyInstance, sql: Sql): void {
           sql<SidebarSession[]>`
             SELECT id, project_id, name, model, updated_at
             FROM sessions
-            WHERE project_id = ${p.id}
+            WHERE project_id = ${p.id} AND status = 'open'
             ORDER BY updated_at DESC
             LIMIT 6
           `,
           sql<{ n: number }[]>`
             SELECT COUNT(*)::int AS n
             FROM sessions
-            WHERE project_id = ${p.id}
+            WHERE project_id = ${p.id} AND status = 'open'
           `,
         ]);
         return {
           id: p.id,
           name: p.name,
+          path: p.path,
+          gitea_remote: p.gitea_remote,
           recent_sessions,
           total_sessions: countRows[0]?.n ?? 0,
         };

apps/server/src/routes/ws.ts

@@ -22,7 +22,7 @@ export function registerWebSocket(
       }
 
       const messages = await sql<Message[]>`
-        SELECT id, session_id, role, content, tool_calls, tool_results, status, last_seq,
+        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
         FROM messages
         WHERE session_id = ${sessionId}
@@ -44,15 +44,8 @@ export function registerWebSocket(
     }
   );
 
-  app.get('/api/ws/user', { websocket: true }, async (socket, req) => {
-    const user = req.user;
-    // defensive: global auth hook (auth.ts) already rejects unauthenticated /api/* requests;
-    // keep the explicit check here to close the WS cleanly (1008) rather than throwing.
-    if (!user) {
-      socket.close(1008, 'unauthenticated');
-      return;
-    }
-    // No snapshot — user channel is purely live updates.
+  app.get('/api/ws/user', { websocket: true }, async (socket) => {
+    const user = 'default';
     const unsubscribe = broker.subscribeUser(user, (frame) => {
       if (socket.readyState !== socket.OPEN) return;
       try {

apps/server/src/schema.sql

@@ -2,7 +2,7 @@ CREATE TABLE IF NOT EXISTS projects (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   name TEXT NOT NULL,
   path TEXT NOT NULL UNIQUE,
-  added_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  added_at TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp(),
   last_session_id UUID
 );
 
@@ -12,8 +12,8 @@ CREATE TABLE IF NOT EXISTS sessions (
   name TEXT NOT NULL,
   model TEXT NOT NULL,
   system_prompt TEXT NOT NULL DEFAULT '',
-  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+  created_at TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp()
 );
 
 CREATE INDEX IF NOT EXISTS idx_sessions_project ON sessions(project_id, updated_at DESC);
@@ -21,13 +21,13 @@ CREATE INDEX IF NOT EXISTS idx_sessions_project ON sessions(project_id, updated_
 CREATE TABLE IF NOT EXISTS messages (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   session_id UUID NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
-  role TEXT NOT NULL CHECK (role IN ('user', 'assistant', 'tool')),
+  role TEXT NOT NULL,
   content TEXT NOT NULL DEFAULT '',
   tool_calls JSONB,
   tool_results JSONB,
-  status TEXT NOT NULL DEFAULT 'complete' CHECK (status IN ('streaming', 'complete', 'failed')),
+  status TEXT NOT NULL DEFAULT 'complete',
   last_seq INT NOT NULL DEFAULT 0,
-  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+  created_at TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp()
 );
 
 CREATE INDEX IF NOT EXISTS idx_messages_session ON messages(session_id, created_at);
@@ -47,6 +47,8 @@ CREATE TABLE IF NOT EXISTS settings (
 
 INSERT INTO settings (key, value) VALUES ('default_model', '"qwen3.6-35b-a3b-mxfp4"') ON CONFLICT (key) DO NOTHING;
 
+-- DEPRECATED: client-side pane state as of v1.2-batch4. Table retained per
+-- additive schema rule; no writes. Drop in a future destructive migration.
 CREATE TABLE IF NOT EXISTS session_panes (
   id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   session_id   UUID NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
@@ -58,11 +60,96 @@ CREATE TABLE IF NOT EXISTS session_panes (
 );
 CREATE INDEX IF NOT EXISTS idx_session_panes_session ON session_panes (session_id);
 
--- Backfill: ensure every session has at least one pane (default Chat).
--- Idempotent: skipped on subsequent runs because session_panes rows already exist.
-INSERT INTO session_panes (session_id, position, kind, state)
-SELECT s.id, 0, 'chat', '{}'::jsonb
+-- v1.4: backfill removed. Pane layout is client-side (localStorage) since v1.2-batch4.
+-- The CREATE TABLE above is retained for additive-schema discipline; drop is a
+-- future destructive migration.
+
+-- v1.2: sessions.status (open | archived)
+ALTER TABLE sessions ADD COLUMN IF NOT EXISTS status TEXT NOT NULL DEFAULT 'open';
+
+-- v1.2: chats table
+CREATE TABLE IF NOT EXISTS chats (
+  id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  session_id   UUID NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
+  name         TEXT,
+  status       TEXT NOT NULL DEFAULT 'open' CHECK (status IN ('open', 'archived')),
+  created_at   TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp(),
+  updated_at   TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp()
+);
+CREATE INDEX IF NOT EXISTS idx_chats_session_status ON chats (session_id, status, updated_at DESC);
+
+-- v1.2: messages.chat_id + messages.kind
+ALTER TABLE messages ADD COLUMN IF NOT EXISTS chat_id UUID REFERENCES chats(id) ON DELETE CASCADE;
+ALTER TABLE messages ADD COLUMN IF NOT EXISTS kind TEXT NOT NULL DEFAULT 'message';
+CREATE INDEX IF NOT EXISTS idx_messages_chat ON messages (chat_id, created_at);
+
+-- Backfill: one chat per existing session that has none yet
+INSERT INTO chats (session_id, name, status, created_at, updated_at)
+SELECT s.id, s.name, 'open', s.created_at, s.updated_at
 FROM sessions s
 WHERE NOT EXISTS (
-  SELECT 1 FROM session_panes p WHERE p.session_id = s.id
+  SELECT 1 FROM chats c WHERE c.session_id = s.id
 );
+
+-- Backfill: link orphaned messages to their session's first chat
+UPDATE messages SET chat_id = (
+  SELECT c.id FROM chats c WHERE c.session_id = messages.session_id ORDER BY c.created_at ASC LIMIT 1
+)
+WHERE chat_id IS NULL;
+
+-- Enforce NOT NULL on chat_id once all rows are backfilled
+DO $$
+BEGIN
+  IF EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_name = 'messages' AND column_name = 'chat_id' AND is_nullable = 'YES'
+  ) AND NOT EXISTS (
+    SELECT 1 FROM messages WHERE chat_id IS NULL
+  ) THEN
+    ALTER TABLE messages ALTER COLUMN chat_id SET NOT NULL;
+  END IF;
+END $$;
+
+-- v1.2.1: CHECK constraints for sessions.status and messages (role, status)
+-- KEEP IN SYNC: apps/server/src/types/api.ts (MESSAGE_ROLES, MESSAGE_STATUSES, SessionStatus)
+DO $$
+BEGIN
+  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'sessions_status_chk') THEN
+    ALTER TABLE sessions ADD CONSTRAINT sessions_status_chk
+      CHECK (status IN ('open', 'archived'));
+  END IF;
+  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'messages_role_chk') THEN
+    ALTER TABLE messages ADD CONSTRAINT messages_role_chk
+      CHECK (role IN ('user', 'assistant', 'system', 'tool'));
+  END IF;
+  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'messages_status_chk') THEN
+    ALTER TABLE messages ADD CONSTRAINT messages_status_chk
+      CHECK (status IN ('streaming', 'complete', 'failed', 'cancelled'));
+  END IF;
+END $$;
+
+-- v1.2-project-ux: projects.status + projects.gitea_remote
+-- KEEP IN SYNC: apps/server/src/types/api.ts PROJECT_STATUSES
+ALTER TABLE projects ADD COLUMN IF NOT EXISTS status TEXT NOT NULL DEFAULT 'open';
+ALTER TABLE projects ADD COLUMN IF NOT EXISTS gitea_remote TEXT;
+DO $$
+BEGIN
+  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'projects_status_chk') THEN
+    ALTER TABLE projects ADD CONSTRAINT projects_status_chk
+      CHECK (status IN ('open', 'archived'));
+  END IF;
+END $$;
+
+-- v1.3-tab-close-chat-archive: align chats.status vocabulary with projects ('archived' not 'closed')
+-- KEEP IN SYNC: apps/server/src/types/api.ts CHAT_STATUSES
+-- Order matters: (1) drop the OLD inline CHECK that only allowed ('open','closed');
+-- (2) migrate existing rows; (3) add new named CHECK allowing ('open','archived').
+ALTER TABLE chats DROP CONSTRAINT IF EXISTS chats_status_check;
+UPDATE chats SET status = 'archived' WHERE status = 'closed';
+DO $$
+BEGIN
+  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'chats_status_chk') THEN
+    ALTER TABLE chats ADD CONSTRAINT chats_status_chk
+      CHECK (status IN ('open', 'archived'));
+  END IF;
+END $$;

apps/server/src/services/auto_name.ts

@@ -5,31 +5,12 @@ const NAMING_SYSTEM_PROMPT =
 
 const MAX_TITLE_CHARS = 60;
 
-// QWEN3 NON-STREAMING UTILITY-CALL PATTERN
-// ----------------------------------------
-// Qwen3-family chat templates default to chain-of-thought reasoning: the
-// model emits a long <think>…</think> block into `reasoning_content` and
-// only finalizes a real reply in `content`. For short utility calls
-// (naming, classification, routing, summarization) with a tight token
-// budget, the model burns the entire budget on reasoning and returns:
-//   - content: ""
-//   - reasoning_content: "Thinking Process: 1. ..." (mid-thought, truncated)
-//   - finish_reason: "length"
-// Fix: pass `chat_template_kwargs: { enable_thinking: false }` to skip the
-// thinking block, and keep `max_tokens` low (~30 is plenty for a 4-word
-// title). The kwarg is a no-op for non-Qwen chat templates, so it's safe
-// to apply unconditionally for any short non-streaming model call.
-// Apply this same pattern to: fork-message (planned), agent-routing
-// (planned), web-search summarization (planned).
-
 function cleanTitle(raw: string): string {
   let name = raw.trim();
-  // Strip surrounding straight or smart quotes (one layer).
   const quotes = ['"', "'", '`', '‘', '’', '“', '”'];
   while (name.length >= 2 && quotes.includes(name[0]!) && quotes.includes(name[name.length - 1]!)) {
     name = name.slice(1, -1).trim();
   }
-  // Drop a leading "Title:" prefix if the model added one despite instructions.
   name = name.replace(/^title\s*:\s*/i, '').trim();
   if (name.length > MAX_TITLE_CHARS) {
     name = name.slice(0, MAX_TITLE_CHARS).trim();
@@ -46,13 +27,10 @@ interface NamingResponse {
   }>;
 }
 
-// Some Qwen-family models emit "thinking" tokens into reasoning_content and
-// only finalize a real reply in content. Pull a sensible candidate string.
 function pickTitleSource(data: NamingResponse): string {
   const choice = data.choices?.[0]?.message;
   if (!choice) return '';
   if (choice.content && choice.content.trim().length > 0) return choice.content;
-  // Fallback: try to extract a last-line title from reasoning, if present.
   const reasoning = choice.reasoning_content ?? '';
   if (reasoning.length === 0) return '';
   const lines = reasoning
@@ -62,40 +40,48 @@ function pickTitleSource(data: NamingResponse): string {
   return lines[lines.length - 1] ?? '';
 }
 
-export async function maybeAutoNameSession(
+export async function maybeAutoNameChat(
   ctx: InferenceContext,
+  chatId: string,
   sessionId: string
 ): Promise<void> {
   const counts = await ctx.sql<{ n: number }[]>`
     SELECT COUNT(*)::int AS n
     FROM messages
-    WHERE session_id = ${sessionId}
+    WHERE chat_id = ${chatId}
       AND role = 'assistant'
       AND status = 'complete'
+      AND content <> ''
   `;
-  if (counts[0]?.n !== 1) return;
+  if ((counts[0]?.n ?? 0) < 1) return;
 
-  const sessionRows = await ctx.sql<
-    { id: string; name: string; model: string }[]
+  const chatRows = await ctx.sql<
+    { id: string; name: string | null; session_id: string }[]
   >`
-    SELECT id, name, model FROM sessions WHERE id = ${sessionId}
+    SELECT id, name, session_id FROM chats WHERE id = ${chatId}
   `;
-  const session = sessionRows[0];
-  if (!session) return;
-  const existingName = session.name ?? '';
-  if (existingName !== '' && existingName !== 'New session') return;
+  const chat = chatRows[0];
+  if (!chat) return;
+  if (chat.name !== null && chat.name !== '') return;
+
+  const sessionRows = await ctx.sql<{ model: string }[]>`
+    SELECT model FROM sessions WHERE id = ${sessionId}
+  `;
+  const model = sessionRows[0]?.model;
+  if (!model) return;
 
   const userMsg = await ctx.sql<{ content: string }[]>`
     SELECT content FROM messages
-    WHERE session_id = ${sessionId} AND role = 'user'
+    WHERE chat_id = ${chatId} AND role = 'user'
     ORDER BY created_at ASC
     LIMIT 1
   `;
   const assistantMsg = await ctx.sql<{ content: string }[]>`
     SELECT content FROM messages
-    WHERE session_id = ${sessionId}
+    WHERE chat_id = ${chatId}
       AND role = 'assistant'
       AND status = 'complete'
+      AND content <> ''
     ORDER BY created_at ASC
     LIMIT 1
   `;
@@ -105,7 +91,7 @@ export async function maybeAutoNameSession(
   const assistantText = assistantMsg[0].content.slice(0, 2000);
 
   const body = {
-    model: session.model,
+    model,
     messages: [
       { role: 'system', content: NAMING_SYSTEM_PROMPT },
       {
@@ -116,9 +102,6 @@ export async function maybeAutoNameSession(
     max_tokens: 30,
     temperature: 0.3,
     stream: false,
-    // Qwen-family models default to chain-of-thought; this template kwarg
-    // tells llama.cpp's chat template renderer to skip the thinking block.
-    // Harmless for non-Qwen models.
     chat_template_kwargs: { enable_thinking: false },
   };
 
@@ -135,23 +118,30 @@ export async function maybeAutoNameSession(
   const raw = pickTitleSource(data);
   const name = cleanTitle(raw);
   if (!name) {
-    ctx.log.warn({ sessionId, raw }, 'auto-name: empty title from model');
+    ctx.log.warn({ chatId, raw }, 'auto-name: empty title from model');
     return;
   }
 
-  const updated = await ctx.sql<{ id: string; name: string }[]>`
-    UPDATE sessions
-    SET name = ${name}, updated_at = NOW()
-    WHERE id = ${sessionId}
-      AND (name IS NULL OR name = '' OR name = 'New session')
-    RETURNING id, name
+  const updated = await ctx.sql<{ id: string; name: string; session_id: string; updated_at: string }[]>`
+    UPDATE chats
+    SET name = ${name}, updated_at = clock_timestamp()
+    WHERE id = ${chatId}
+      AND (name IS NULL OR name = '')
+    RETURNING id, name, session_id, updated_at
   `;
   if (updated.length === 0) return;
 
   ctx.publish(sessionId, {
-    type: 'session_renamed',
-    session_id: sessionId,
+    type: 'chat_renamed',
+    chat_id: chatId,
     name,
   });
-  ctx.log.info({ sessionId, name }, 'session auto-named');
+  ctx.publishUser({
+    type: 'chat_updated',
+    chat_id: chatId,
+    session_id: sessionId,
+    name,
+    updated_at: updated[0]!.updated_at,
+  });
+  ctx.log.info({ chatId, name }, 'chat auto-named');
 }

apps/server/src/services/gitea.ts

@@ -0,0 +1,50 @@
+export interface GiteaConfig {
+  baseUrl: string;
+  user: string;
+  token: string;
+}
+
+export interface GiteaRepo {
+  clone_url: string;
+  ssh_url: string;
+  html_url: string;
+}
+
+export class GiteaRepoExistsError extends Error {
+  constructor() {
+    super('gitea-repo-exists');
+  }
+}
+
+export async function createGiteaRepo(
+  cfg: GiteaConfig,
+  name: string,
+  options: { private: boolean }
+): Promise<GiteaRepo> {
+  const res = await fetch(`${cfg.baseUrl}/api/v1/user/repos`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+      Authorization: `token ${cfg.token}`,
+    },
+    body: JSON.stringify({
+      name,
+      private: options.private,
+      auto_init: false,
+    }),
+  });
+  if (res.status === 409) throw new GiteaRepoExistsError();
+  if (!res.ok) {
+    const text = await res.text().catch(() => '');
+    throw new Error(`gitea-api-${res.status}: ${text.slice(0, 200)}`);
+  }
+  const body = (await res.json()) as { ssh_url?: string; clone_url?: string; html_url?: string };
+  if (!body.ssh_url || !body.html_url || !body.clone_url) {
+    throw new Error(`gitea-api-unexpected-shape: ${JSON.stringify(body).slice(0, 200)}`);
+  }
+  return {
+    ssh_url: body.ssh_url,
+    clone_url: body.clone_url,
+    html_url: body.html_url,
+  };
+}

apps/server/src/services/inference.ts

@@ -4,7 +4,7 @@ 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 { PathScopeError, resolveProjectRoot } from './path_guard.js';
-import { maybeAutoNameSession } from './auto_name.js';
+import { maybeAutoNameChat } from './auto_name.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.`;
@@ -21,9 +21,11 @@ export interface InferenceFrame {
     | 'message_complete'
     | 'messages_deleted'
     | 'session_renamed'
+    | 'chat_renamed'
     | 'error';
   message_id?: string;
   message_ids?: string[];
+  chat_id?: string;
   tool_message_id?: string;
   tool_call_id?: string;
   role?: 'assistant' | 'tool' | 'user';
@@ -101,8 +103,23 @@ export function buildMessagesPayload(
   }
   out.push({ role: 'system', content: systemPrompt });
 
-  for (const m of history) {
+  // Find the latest compact marker — only send messages from that point onwards
+  let startIdx = 0;
+  for (let i = history.length - 1; i >= 0; i--) {
+    if (history[i]!.kind === 'compact') {
+      startIdx = i;
+      break;
+    }
+  }
+
+  for (let i = startIdx; i < history.length; i++) {
+    const m = history[i]!;
+    if (m.kind === 'compact') {
+      out.push({ role: 'system', content: m.content });
+      continue;
+    }
     if (m.role === 'assistant' && m.status === 'streaming') continue;
+    if (m.role === 'assistant' && m.status === 'cancelled') continue;
     if (m.role === 'tool') {
       const tr = m.tool_results;
       if (!tr) continue;
@@ -140,10 +157,11 @@ export function buildMessagesPayload(
 
 async function loadContext(
   sql: Sql,
-  sessionId: string
+  sessionId: string,
+  chatId: string
 ): Promise<{ session: Session; project: Project; history: Message[] } | null> {
   const sessionRows = await sql<Session[]>`
-    SELECT id, project_id, name, model, system_prompt, created_at, updated_at
+    SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at
     FROM sessions WHERE id = ${sessionId}
   `;
   if (sessionRows.length === 0) return null;
@@ -157,10 +175,10 @@ async function loadContext(
   const project = projectRows[0]!;
 
   const history = await sql<Message[]>`
-    SELECT id, session_id, role, content, tool_calls, tool_results, status, last_seq,
+    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
     FROM messages
-    WHERE session_id = ${sessionId}
+    WHERE chat_id = ${chatId}
     ORDER BY created_at ASC, id ASC
   `;
 
@@ -204,7 +222,8 @@ async function streamCompletion(
   model: string,
   messages: OpenAiMessage[],
   includeTools: boolean,
-  onDelta: (content: string) => void
+  onDelta: (content: string) => void,
+  signal?: AbortSignal
 ): Promise<StreamResult> {
   const body: Record<string, unknown> = {
     model,
@@ -221,6 +240,7 @@ async function streamCompletion(
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify(body),
+    signal,
   });
   if (!res.ok || !res.body) {
     const text = await res.text().catch(() => '');
@@ -328,36 +348,27 @@ async function executeToolCall(
   }
 }
 
-async function runAssistantTurn(
-  ctx: InferenceContext,
-  sessionId: string,
-  assistantMessageId: string,
-  depth: number
-): Promise<void> {
-  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,
-      error: 'tool loop depth exceeded',
-    });
-    return;
-  }
+interface TurnArgs {
+  sessionId: string;
+  chatId: string;
+  assistantMessageId: string;
+  depth: number;
+  signal: AbortSignal | undefined;
+}
 
-  const loaded = await loadContext(ctx.sql, sessionId);
-  if (!loaded) {
-    ctx.log.warn({ sessionId }, 'inference: session or project missing');
-    return;
-  }
-  const { session, project, history } = loaded;
-  const projectRoot = await resolveProjectRoot(project.path);
-  const messages = buildMessagesPayload(session, project, history);
+interface StreamPhaseState {
+  accumulated: string;
+  startedAt: string | null;
+}
+
+async function executeStreamPhase(
+  ctx: InferenceContext,
+  args: TurnArgs,
+  session: Session,
+  messages: OpenAiMessage[],
+  state: StreamPhaseState
+): Promise<StreamResult> {
+  const { sessionId, chatId, assistantMessageId, signal } = args;
 
   const startedRow = await ctx.sql<{ started_at: string }[]>`
     UPDATE messages
@@ -365,15 +376,15 @@ async function runAssistantTurn(
     WHERE id = ${assistantMessageId}
     RETURNING started_at
   `;
-  const startedAt = startedRow[0]?.started_at ?? null;
+  state.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();
 
@@ -382,7 +393,7 @@ async function runAssistantTurn(
       clearTimeout(pendingFlushTimer);
       pendingFlushTimer = null;
     }
-    const snapshot = accumulated;
+    const snapshot = state.accumulated;
     flushPromise = flushPromise.then(() =>
       ctx.sql`UPDATE messages SET content = ${snapshot} WHERE id = ${assistantMessageId}`
     );
@@ -396,138 +407,181 @@ async function runAssistantTurn(
     }, DB_FLUSH_INTERVAL_MS);
   };
 
-  let result: StreamResult;
   try {
-    result = await streamCompletion(
+    return await streamCompletion(
       ctx,
       session.model,
       messages,
       true,
       (delta) => {
-        accumulated += delta;
+        state.accumulated += delta;
         ctx.publish(sessionId, {
           type: 'delta',
           message_id: assistantMessageId,
+          chat_id: chatId,
           content: delta,
         });
         ctx.log.debug({ sessionId, delta }, 'inference delta');
         scheduleFlush();
-      }
+      },
+      signal
     );
-  } catch (err) {
+  } finally {
     if (pendingFlushTimer) {
       clearTimeout(pendingFlushTimer);
       pendingFlushTimer = null;
     }
-    const errMsg = err instanceof Error ? err.message : String(err);
-    await ctx.sql`
-      UPDATE messages
-      SET status = 'failed',
-          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 });
-    ctx.publish(sessionId, {
-      type: 'error',
-      message_id: assistantMessageId,
-      error: errMsg,
-    });
-    ctx.log.error({ err, sessionId, assistantMessageId }, 'inference failed');
-    return;
+    await flushPromise;
   }
+}
 
-  if (pendingFlushTimer) {
-    clearTimeout(pendingFlushTimer);
-    pendingFlushTimer = null;
-  }
-  await flushPromise;
-
-  const { content, finishReason, toolCalls, promptTokens, completionTokens, nCtx } = result;
-
-  if (toolCalls.length > 0) {
-    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 = ${content},
-          status = 'complete',
-          tool_calls = ${ctx.sql.json(toolCalls as never)},
-          tokens_used = ${completionTokens},
-          ctx_used = ${promptTokens},
-          ctx_max = ${nCtx},
-          finished_at = clock_timestamp()
-      WHERE id = ${assistantMessageId}
-      RETURNING tokens_used, ctx_used, ctx_max, finished_at
-    `;
-    const [toolSessRow] = 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: toolSessRow!.project_id, name: toolSessRow!.name, updated_at: toolSessRow!.updated_at });
-    for (const tc of toolCalls) {
-      ctx.publish(sessionId, {
-        type: 'tool_call',
-        message_id: assistantMessageId,
-        tool_call: tc,
-      });
-    }
+async function handleAbortOrError(
+  ctx: InferenceContext,
+  args: TurnArgs,
+  accumulated: string,
+  err: unknown
+): Promise<void> {
+  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 [failSessRow] = await ctx.sql<{ project_id: string; name: string; updated_at: string }[]>`
+    UPDATE sessions SET updated_at = clock_timestamp()
+    WHERE id = ${sessionId}
+    RETURNING project_id, name, updated_at
+  `;
+  ctx.publishUser({ type: 'session_updated', session_id: sessionId, project_id: failSessRow!.project_id, name: failSessRow!.name, updated_at: failSessRow!.updated_at });
+  if (isAbort) {
     ctx.publish(sessionId, {
       type: 'message_complete',
       message_id: assistantMessageId,
-      tokens_used: updated?.tokens_used ?? null,
-      ctx_used: updated?.ctx_used ?? null,
-      ctx_max: updated?.ctx_max ?? null,
-      started_at: startedAt,
-      finished_at: updated?.finished_at ?? null,
-      model: session.model,
+      chat_id: chatId,
     });
-
-    await Promise.all(
-      toolCalls.map(async (tc) => {
-        const [toolRow] = await ctx.sql<{ id: string }[]>`
-          INSERT INTO messages (session_id, role, content, status, created_at)
-          VALUES (${sessionId}, 'tool', '', 'complete', clock_timestamp())
-          RETURNING id
-        `;
-        const toolMessageId = toolRow!.id;
-        const tres = await executeToolCall(projectRoot, tc);
-        const stored = {
-          tool_call_id: tc.id,
-          output: tres.output,
-          truncated: tres.truncated,
-          ...(tres.error ? { error: tres.error } : {}),
-        };
-        await ctx.sql`
-          UPDATE messages
-          SET tool_results = ${ctx.sql.json(stored as never)}
-          WHERE id = ${toolMessageId}
-        `;
-        ctx.publish(sessionId, {
-          type: 'tool_result',
-          tool_message_id: toolMessageId,
-          tool_call_id: tc.id,
-          output: tres.output,
-          truncated: tres.truncated,
-          ...(tres.error ? { error: tres.error } : {}),
-        });
-      })
-    );
-
-    const [nextAssistant] = await ctx.sql<{ id: string }[]>`
-      INSERT INTO messages (session_id, role, content, status, created_at)
-      VALUES (${sessionId}, 'assistant', '', 'streaming', clock_timestamp())
-      RETURNING id
-    `;
-    await runAssistantTurn(ctx, sessionId, nextAssistant!.id, depth + 1);
-    return;
+    ctx.log.info({ sessionId, chatId, assistantMessageId }, 'inference cancelled');
+  } else {
+    const errMsg = err instanceof Error ? err.message : String(err);
+    ctx.publish(sessionId, {
+      type: 'error',
+      message_id: assistantMessageId,
+      chat_id: chatId,
+      error: errMsg,
+    });
+    ctx.log.error({ err, sessionId, assistantMessageId }, 'inference failed');
   }
+}
+
+async function executeToolPhase(
+  ctx: InferenceContext,
+  args: TurnArgs,
+  result: StreamResult,
+  startedAt: string | null,
+  session: Session,
+  projectRoot: string
+): Promise<void> {
+  const { sessionId, chatId, assistantMessageId, depth, signal } = args;
+  const { content, toolCalls, promptTokens, completionTokens, nCtx } = 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 = ${content},
+        status = 'complete',
+        tool_calls = ${ctx.sql.json(toolCalls as never)},
+        tokens_used = ${completionTokens},
+        ctx_used = ${promptTokens},
+        ctx_max = ${nCtx},
+        finished_at = clock_timestamp()
+    WHERE id = ${assistantMessageId}
+    RETURNING tokens_used, ctx_used, ctx_max, finished_at
+  `;
+  const [toolSessRow] = await ctx.sql<{ project_id: string; name: string; updated_at: string }[]>`
+    UPDATE sessions SET updated_at = clock_timestamp()
+    WHERE id = ${sessionId}
+    RETURNING project_id, name, updated_at
+  `;
+  ctx.publishUser({ type: 'session_updated', session_id: sessionId, project_id: toolSessRow!.project_id, name: toolSessRow!.name, updated_at: toolSessRow!.updated_at });
+  for (const tc of toolCalls) {
+    ctx.publish(sessionId, {
+      type: 'tool_call',
+      message_id: assistantMessageId,
+      chat_id: chatId,
+      tool_call: tc,
+    });
+  }
+  ctx.publish(sessionId, {
+    type: 'message_complete',
+    message_id: assistantMessageId,
+    chat_id: chatId,
+    tokens_used: updated?.tokens_used ?? null,
+    ctx_used: updated?.ctx_used ?? null,
+    ctx_max: updated?.ctx_max ?? null,
+    started_at: startedAt,
+    finished_at: updated?.finished_at ?? null,
+    model: session.model,
+  });
+
+  await Promise.all(
+    toolCalls.map(async (tc) => {
+      const [toolRow] = await ctx.sql<{ id: string }[]>`
+        INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+        VALUES (${sessionId}, ${chatId}, 'tool', '', 'complete', clock_timestamp())
+        RETURNING id
+      `;
+      const toolMessageId = toolRow!.id;
+      const tres = await executeToolCall(projectRoot, tc);
+      const stored = {
+        tool_call_id: tc.id,
+        output: tres.output,
+        truncated: tres.truncated,
+        ...(tres.error ? { error: tres.error } : {}),
+      };
+      await ctx.sql`
+        UPDATE messages
+        SET tool_results = ${ctx.sql.json(stored as never)}
+        WHERE id = ${toolMessageId}
+      `;
+      ctx.publish(sessionId, {
+        type: 'tool_result',
+        tool_message_id: toolMessageId,
+        chat_id: chatId,
+        tool_call_id: tc.id,
+        output: tres.output,
+        truncated: tres.truncated,
+        ...(tres.error ? { error: tres.error } : {}),
+      });
+    })
+  );
+
+  const [nextAssistant] = await ctx.sql<{ id: string }[]>`
+    INSERT INTO messages (session_id, chat_id, role, content, status, created_at)
+    VALUES (${sessionId}, ${chatId}, 'assistant', '', 'streaming', clock_timestamp())
+    RETURNING id
+  `;
+  await runAssistantTurn(ctx, {
+    sessionId,
+    chatId,
+    assistantMessageId: nextAssistant!.id,
+    depth: depth + 1,
+    signal,
+  });
+}
+
+async function finalizeCompletion(
+  ctx: InferenceContext,
+  args: TurnArgs,
+  result: StreamResult,
+  startedAt: string | null,
+  session: Session
+): Promise<void> {
+  const { sessionId, chatId, assistantMessageId } = args;
+  const { content, finishReason, promptTokens, completionTokens, nCtx } = result;
 
   const [updated] = await ctx.sql<
     { tokens_used: number | null; ctx_used: number | null; ctx_max: number | null; finished_at: string | null }[]
@@ -551,6 +605,7 @@ async function runAssistantTurn(
   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,
@@ -561,6 +616,7 @@ async function runAssistantTurn(
   ctx.log.info(
     {
       sessionId,
+      chatId,
       assistantMessageId,
       finishReason,
       chars: content.length,
@@ -571,39 +627,209 @@ async function runAssistantTurn(
   );
 }
 
+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 loaded = await loadContext(ctx.sql, sessionId, chatId);
+  if (!loaded) {
+    ctx.log.warn({ sessionId }, 'inference: session or project missing');
+    return;
+  }
+  const { session, project, history } = loaded;
+  const projectRoot = await resolveProjectRoot(project.path);
+  const messages = buildMessagesPayload(session, project, history);
+
+  const state: StreamPhaseState = { accumulated: '', startedAt: null };
+  let result: StreamResult;
+  try {
+    result = await executeStreamPhase(ctx, args, session, messages, state);
+  } catch (err) {
+    await handleAbortOrError(ctx, args, state.accumulated, err);
+    return;
+  }
+
+  if (result.toolCalls.length > 0) {
+    await executeToolPhase(ctx, args, result, state.startedAt, session, projectRoot);
+    return;
+  }
+
+  await finalizeCompletion(ctx, args, result, state.startedAt, session);
+}
+
 export async function runInference(
   ctx: InferenceContext,
   sessionId: string,
-  assistantMessageId: string
+  chatId: string,
+  assistantMessageId: string,
+  signal?: AbortSignal
 ): Promise<void> {
-  return runAssistantTurn(ctx, sessionId, assistantMessageId, 0);
+  return runAssistantTurn(ctx, { sessionId, chatId, assistantMessageId, depth: 0, signal });
+}
+
+const COMPACT_SYSTEM_PROMPT =
+  'Summarize the preceding conversation into a dense but complete context paragraph. Preserve all key facts, decisions, file paths, code patterns, and action items. Do not add any new information. Output only the summary paragraph.';
+
+async function runCompact(
+  ctx: InferenceContext,
+  sessionId: string,
+  chatId: string,
+  compactMessageId: string
+): Promise<void> {
+  const loaded = await loadContext(ctx.sql, sessionId, chatId);
+  if (!loaded) return;
+  const { session, project, history } = loaded;
+
+  const messagesForSummary = buildMessagesPayload(session, project,
+    history.filter((m) => m.id !== compactMessageId)
+  );
+  messagesForSummary.push({
+    role: 'system',
+    content: COMPACT_SYSTEM_PROMPT,
+  });
+
+  ctx.publish(sessionId, {
+    type: 'message_started',
+    message_id: compactMessageId,
+    chat_id: chatId,
+    role: 'assistant',
+  });
+
+  let content = '';
+  try {
+    const result = await streamCompletion(
+      ctx,
+      session.model,
+      messagesForSummary,
+      false,
+      (delta) => {
+        content += delta;
+        ctx.publish(sessionId, {
+          type: 'delta',
+          message_id: compactMessageId,
+          chat_id: chatId,
+          content: delta,
+        });
+      }
+    );
+    content = result.content;
+  } catch (err) {
+    const errMsg = err instanceof Error ? err.message : String(err);
+    await ctx.sql`
+      UPDATE messages SET status = 'failed', content = ${content}, finished_at = clock_timestamp()
+      WHERE id = ${compactMessageId}
+    `;
+    ctx.publish(sessionId, {
+      type: 'error',
+      message_id: compactMessageId,
+      chat_id: chatId,
+      error: errMsg,
+    });
+    return;
+  }
+
+  const preCompactCount = history.filter((m) => m.id !== compactMessageId && m.kind !== 'compact').length;
+  const summary = `[Context compacted — ${preCompactCount} messages summarized]\n\n${content}`;
+
+  await ctx.sql`
+    UPDATE messages SET content = ${summary}, status = 'complete', finished_at = clock_timestamp()
+    WHERE id = ${compactMessageId}
+  `;
+  ctx.publish(sessionId, {
+    type: 'message_complete',
+    message_id: compactMessageId,
+    chat_id: chatId,
+  });
+}
+
+interface InferenceRegistration {
+  controller: AbortController;
+  completed: Promise<void>;
 }
 
 export function createInferenceRunner(
   ctx: Omit<InferenceContext, 'publishUser'>,
   publishUserFn: (user: string, frame: UserStreamFrame) => void
 ) {
+  const registry = new Map<string, InferenceRegistration>();
+
   return {
-    enqueue(sessionId: string, assistantMessageId: string, user: string) {
+    enqueue(sessionId: string, chatId: string, assistantMessageId: string, user: string) {
+      const callCtx: InferenceContext = {
+        ...ctx,
+        publishUser: (frame) => publishUserFn(user, frame),
+      };
+      const controller = new AbortController();
+      let resolveCompleted!: () => void;
+      const completed = new Promise<void>((res) => { resolveCompleted = res; });
+      const registration: InferenceRegistration = { controller, completed };
+      registry.set(chatId, registration);
+      void (async () => {
+        try {
+          await runInference(callCtx, sessionId, chatId, assistantMessageId, controller.signal);
+          setImmediate(() => {
+            void maybeAutoNameChat(callCtx, chatId, sessionId).catch((err: Error) => {
+              callCtx.log.warn({ err, chatId }, 'auto-name failed');
+            });
+          });
+        } catch (err) {
+          callCtx.log.error({ err }, 'unhandled inference error');
+        } finally {
+          resolveCompleted();
+          // Only clear our own registration; a force-send may have replaced it.
+          if (registry.get(chatId) === registration) {
+            registry.delete(chatId);
+          }
+        }
+      })();
+    },
+
+    enqueueCompact(sessionId: string, chatId: string, compactMessageId: string, user: string) {
       const callCtx: InferenceContext = {
         ...ctx,
         publishUser: (frame) => publishUserFn(user, frame),
       };
       void (async () => {
         try {
-          await runInference(callCtx, sessionId, assistantMessageId);
-          setImmediate(() => {
-            void maybeAutoNameSession(callCtx, sessionId).catch((err) => {
-              callCtx.log.warn({ err, sessionId }, 'auto-name failed');
-            });
-          });
+          await runCompact(callCtx, sessionId, chatId, compactMessageId);
         } catch (err) {
-          callCtx.log.error({ err }, 'unhandled inference error');
+          callCtx.log.error({ err }, 'unhandled compact error');
         }
       })();
     },
+
+    async cancel(_sessionId: string, chatId: string): Promise<boolean> {
+      const reg = registry.get(chatId);
+      if (!reg) return false;
+      reg.controller.abort();
+      // Swallow — we just need to wait for the catch/finally to persist state.
+      await reg.completed.catch(() => {});
+      return true;
+    },
+
+    hasActive(chatId: string): boolean {
+      return registry.has(chatId);
+    },
   };
 }
 
-// Reference to keep ALL_TOOLS imported for type checks if needed
 export const _toolNames = ALL_TOOLS.map((t) => t.name);

apps/server/src/services/project_bootstrap.ts

@@ -0,0 +1,179 @@
+import { execFile } from 'node:child_process';
+import { promisify } from 'node:util';
+import { mkdir, writeFile, realpath } from 'node:fs/promises';
+import { existsSync } from 'node:fs';
+import { resolve, sep } from 'node:path';
+import type { FastifyBaseLogger } from 'fastify';
+import type { Config } from '../config.js';
+import { createGiteaRepo, GiteaRepoExistsError } from './gitea.js';
+
+const execFileAsync = promisify(execFile);
+
+const GITIGNORE_TEMPLATE = `# OS / editor
+.DS_Store
+*.swp
+*~
+
+# Node
+node_modules/
+dist/
+build/
+.env
+.env.local
+
+# Python
+__pycache__/
+*.pyc
+.venv/
+venv/
+
+# AI agents
+.claude/
+.opencode/
+
+# Backups
+*.bak*
+`;
+
+const GIT_USER_NAME = 'indifferentketchup';
+const GIT_USER_EMAIL = 'samkintop@gmail.com';
+
+export interface BootstrapResult {
+  folder_real_path: string;
+  folder_name: string;
+  gitea_remote_url: string | null;
+  folder_created: boolean;
+  git_initialized: boolean;
+  first_commit: boolean;
+  gitea_remote_created: boolean;
+  gitea_pushed: boolean;
+  warnings: string[];
+}
+
+const SAFE_NAME = /^[a-z0-9][a-z0-9-]{0,63}$/;
+
+export function sanitizeFolderName(raw: string): string {
+  return raw
+    .toLowerCase()
+    .trim()
+    .replace(/\s+/g, '-')
+    .replace(/[^a-z0-9-]/g, '')
+    .replace(/-+/g, '-')
+    .replace(/^-+|-+$/g, '')
+    .slice(0, 64);
+}
+
+export class BootstrapNameError extends Error {}
+export class BootstrapCollisionError extends Error {}
+export class BootstrapPathError extends Error {}
+
+export async function bootstrapProject(
+  config: Config,
+  log: FastifyBaseLogger,
+  options: {
+    name: string;
+    commitMessage: string;
+    visibility: 'private' | 'public';
+    createGiteaRemote: boolean;
+  }
+): Promise<BootstrapResult> {
+  const folder = sanitizeFolderName(options.name);
+  if (folder.length === 0 || !SAFE_NAME.test(folder)) {
+    throw new BootstrapNameError(`invalid name after sanitization: "${folder}"`);
+  }
+
+  // Whitelist resolution
+  const whitelistReal = await realpath(config.PROJECT_ROOT_WHITELIST);
+  const fullPath = resolve(whitelistReal, folder);
+  if (!fullPath.startsWith(whitelistReal + sep)) {
+    throw new BootstrapPathError('path escapes whitelist');
+  }
+  if (existsSync(fullPath)) {
+    throw new BootstrapCollisionError(`path already exists: ${fullPath}`);
+  }
+
+  const warnings: string[] = [];
+  let folder_created = false;
+  let git_initialized = false;
+  let first_commit = false;
+  let gitea_remote_created = false;
+  let gitea_pushed = false;
+  let gitea_remote_url: string | null = null;
+
+  // Step 1: mkdir
+  await mkdir(fullPath, { recursive: false });
+  folder_created = true;
+  log.info({ fullPath }, 'project_bootstrap: folder created');
+
+  // Step 2: write .gitignore
+  await writeFile(resolve(fullPath, '.gitignore'), GITIGNORE_TEMPLATE, 'utf8');
+
+  // Step 3: git init -b main
+  await execFileAsync('git', ['init', '-b', 'main'], { cwd: fullPath });
+  git_initialized = true;
+
+  // Step 4: git add + commit (per-command -c, no global config touch)
+  await execFileAsync('git', ['add', '.gitignore'], { cwd: fullPath });
+  await execFileAsync(
+    'git',
+    [
+      '-c', `user.name=${GIT_USER_NAME}`,
+      '-c', `user.email=${GIT_USER_EMAIL}`,
+      'commit',
+      '-m', options.commitMessage,
+    ],
+    { cwd: fullPath }
+  );
+  first_commit = true;
+  log.info({ folder }, 'project_bootstrap: initial commit');
+
+  // Step 5: optional Gitea remote
+  if (options.createGiteaRemote) {
+    if (!config.GITEA_TOKEN) {
+      warnings.push('Gitea remote skipped — token not configured');
+    } else {
+      try {
+        const repo = await createGiteaRepo(
+          { baseUrl: config.GITEA_BASE_URL, user: config.GITEA_USER, token: config.GITEA_TOKEN },
+          folder,
+          { private: options.visibility === 'private' }
+        );
+        gitea_remote_created = true;
+        gitea_remote_url = repo.html_url;
+        log.info({ folder, html_url: repo.html_url }, 'project_bootstrap: gitea repo created');
+
+        // Step 6: git remote add + push
+        try {
+          await execFileAsync('git', ['remote', 'add', 'origin', repo.ssh_url], { cwd: fullPath });
+          await execFileAsync('git', ['push', '-u', 'origin', 'main'], { cwd: fullPath });
+          gitea_pushed = true;
+          log.info({ folder }, 'project_bootstrap: pushed to gitea');
+        } catch (pushErr) {
+          const msg = pushErr instanceof Error ? pushErr.message : String(pushErr);
+          warnings.push(`Push to Gitea failed: ${msg.slice(0, 200)}`);
+          log.warn({ err: pushErr, folder }, 'project_bootstrap: push failed');
+        }
+      } catch (err) {
+        if (err instanceof GiteaRepoExistsError) {
+          warnings.push('Gitea repo already exists with this name; local repo created without remote');
+        } else {
+          const msg = err instanceof Error ? err.message : String(err);
+          warnings.push(`Gitea remote creation failed: ${msg.slice(0, 200)}`);
+        }
+        log.warn({ err, folder }, 'project_bootstrap: gitea remote step failed');
+      }
+    }
+  }
+
+  return {
+    folder_real_path: fullPath,
+    folder_name: folder,
+    gitea_remote_url,
+    folder_created,
+    git_initialized,
+    first_commit,
+    gitea_remote_created,
+    gitea_pushed,
+    warnings,
+  };
+}

apps/server/src/types/api.ts

@@ -1,9 +1,15 @@
+// KEEP IN SYNC: apps/server/src/schema.sql projects_status_chk
+export const PROJECT_STATUSES = ['open', 'archived'] as const;
+export type ProjectStatus = typeof PROJECT_STATUSES[number];
+
 export interface Project {
   id: string;
   name: string;
   path: string;
   added_at: string;
   last_session_id: string | null;
+  status: ProjectStatus;
+  gitea_remote: string | null;
 }
 
 export interface AvailableProject {
@@ -11,18 +17,45 @@ export interface AvailableProject {
   name: string;
 }
 
+export type SessionStatus = 'open' | 'archived';
+
 export interface Session {
   id: string;
   project_id: string;
   name: string;
   model: string;
   system_prompt: string;
+  status: SessionStatus;
   created_at: string;
   updated_at: string;
 }
 
-export type MessageRole = 'user' | 'assistant' | 'tool';
-export type MessageStatus = 'streaming' | 'complete' | 'failed';
+// KEEP IN SYNC: apps/server/src/schema.sql chats_status_chk
+export const CHAT_STATUSES = ['open', 'archived'] as const;
+export type ChatStatus = typeof CHAT_STATUSES[number];
+
+export interface Chat {
+  id: string;
+  session_id: string;
+  name: string | null;
+  status: ChatStatus;
+  created_at: string;
+  updated_at: string;
+  // Populated by GET /api/sessions/:id/chats only.
+  message_count?: number;
+  last_message_preview?: string | null;
+  effective_context_tokens?: number | null;
+}
+
+// KEEP IN SYNC: apps/server/src/schema.sql messages_role_chk / messages_status_chk
+export const MESSAGE_ROLES = ['user', 'assistant', 'system', 'tool'] as const;
+export type MessageRole = typeof MESSAGE_ROLES[number];
+
+export const MESSAGE_STATUSES = ['streaming', 'complete', 'failed', 'cancelled'] as const;
+export type MessageStatus = typeof MESSAGE_STATUSES[number];
+
+export const MESSAGE_KINDS = ['message', 'compact'] as const;
+export type MessageKind = typeof MESSAGE_KINDS[number];
 
 export interface ToolCall {
   id: string;
@@ -40,8 +73,10 @@ export interface ToolResult {
 export interface Message {
   id: string;
   session_id: string;
+  chat_id: string;
   role: MessageRole;
   content: string;
+  kind: MessageKind;
   tool_calls: ToolCall[] | null;
   tool_results: ToolResult | null;
   status: MessageStatus;
@@ -70,6 +105,8 @@ export interface SidebarSession {
 export interface SidebarProject {
   id: string;
   name: string;
+  path: string;
+  gitea_remote: string | null;
   recent_sessions: SidebarSession[];
   total_sessions: number;
 }
@@ -139,9 +176,68 @@ export interface SessionUpdatedFrame {
   name: string;
   updated_at: string;
 }
+export interface SessionRenamedFrame {
+  type: 'session_renamed';
+  session_id: string;
+  name: string;
+}
+export interface SessionArchivedFrame {
+  type: 'session_archived';
+  session_id: string;
+  project_id: string;
+}
+export interface ChatCreatedFrame {
+  type: 'chat_created';
+  chat: Chat;
+  session_id: string;
+}
+export interface ChatUpdatedFrame {
+  type: 'chat_updated';
+  chat_id: string;
+  session_id: string;
+  name: string | null;
+  updated_at: string;
+}
+export interface ChatArchivedFrame {
+  type: 'chat_archived';
+  chat_id: string;
+  session_id: string;
+}
+export interface ChatUnarchivedFrame {
+  type: 'chat_unarchived';
+  chat: Chat;
+}
+export interface ChatDeletedFrame {
+  type: 'chat_deleted';
+  chat_id: string;
+  session_id: string;
+}
+export interface ProjectArchivedFrame {
+  type: 'project_archived';
+  project_id: string;
+}
+export interface ProjectUnarchivedFrame {
+  type: 'project_unarchived';
+  project: Project;
+}
+export interface ProjectUpdatedFrame {
+  type: 'project_updated';
+  project_id: string;
+  name: string;
+}
 export type UserStreamFrame =
   | ProjectCreatedFrame
   | ProjectDeletedFrame
   | SessionCreatedFrame
   | SessionDeletedFrame
-  | SessionUpdatedFrame;
+  | SessionUpdatedFrame
+  | SessionRenamedFrame
+  | SessionArchivedFrame
+  | ChatCreatedFrame
+  | ChatUpdatedFrame
+  | ChatArchivedFrame
+  | ChatUnarchivedFrame
+  | ChatDeletedFrame
+  | ProjectArchivedFrame
+  | ProjectUnarchivedFrame
+  | ProjectUpdatedFrame;

apps/web/src/App.tsx

@@ -1,11 +1,29 @@
-import { BrowserRouter, Routes, Route } from 'react-router-dom';
+import { useEffect, useState } from 'react';
+import { BrowserRouter, Routes, Route, useParams } from 'react-router-dom';
+import { api } from '@/api/client';
 import { ProjectSidebar } from '@/components/ProjectSidebar';
+import { RightRail } from '@/components/RightRail';
 import { Home } from '@/pages/Home';
 import { Project } from '@/pages/Project';
 import { Session } from '@/pages/Session';
 import { Toaster } from '@/components/ui/sonner';
 import { useUserEvents } from '@/hooks/useUserEvents';
 
+function SessionRightRail() {
+  const { id } = useParams<{ id: string }>();
+  if (!id) return null;
+  return <RightRailForSession sessionId={id} />;
+}
+
+function RightRailForSession({ sessionId }: { sessionId: string }) {
+  const [projectId, setProjectId] = useState<string | null>(null);
+  useEffect(() => {
+    api.sessions.get(sessionId).then((s) => setProjectId(s.project_id)).catch(() => {});
+  }, [sessionId]);
+  if (!projectId) return null;
+  return <RightRail projectId={projectId} />;
+}
+
 function AppShell() {
   useUserEvents();
   return (
@@ -18,6 +36,9 @@ function AppShell() {
           <Route path="/session/:id" element={<Session />} />
         </Routes>
       </main>
+      <Routes>
+        <Route path="/session/:id" element={<SessionRightRail />} />
+      </Routes>
       <Toaster position="bottom-right" />
     </div>
   );

apps/web/src/api/client.ts

@@ -2,14 +2,12 @@ import type {
   Project,
   AvailableProject,
   Session,
+  Chat,
   Message,
   ModelInfo,
   SidebarResponse,
   ListDirResult,
   ViewFileResult,
-  Pane,
-  PaneCreateRequest,
-  PaneUpdateRequest,
 } from './types';
 
 export class ApiError extends Error {
@@ -43,13 +41,43 @@ export const api = {
   health: () => request<{ status: string; db: boolean }>('/api/health'),
 
   projects: {
-    list: () => request<Project[]>('/api/projects'),
+    list: (params?: { status?: 'open' | 'archived' }) =>
+      request<Project[]>(`/api/projects${params?.status ? `?status=${params.status}` : ''}`),
     available: () => request<AvailableProject[]>('/api/projects/available'),
     add: (body: { path: string; name?: string }) =>
       request<Project>('/api/projects', {
         method: 'POST',
         body: JSON.stringify(body),
       }),
+    update: (id: string, body: { name: string }) =>
+      request<Project>(`/api/projects/${id}`, {
+        method: 'PATCH',
+        body: JSON.stringify(body),
+      }),
+    archive: (id: string) =>
+      request<void>(`/api/projects/${id}/archive`, { method: 'POST' }),
+    unarchive: (id: string) =>
+      request<Project>(`/api/projects/${id}/unarchive`, { method: 'POST' }),
+    create: (body: {
+      name: string;
+      commit_message?: string;
+      visibility?: 'private' | 'public';
+      create_gitea_remote?: boolean;
+    }) =>
+      request<{
+        project: Project;
+        bootstrap: {
+          folder_created: boolean;
+          git_initialized: boolean;
+          first_commit: boolean;
+          gitea_remote_created: boolean;
+          gitea_pushed: boolean;
+          warnings: string[];
+        };
+      }>(`/api/projects/create`, {
+        method: 'POST',
+        body: JSON.stringify(body),
+      }),
     remove: (id: string) =>
       request<void>(`/api/projects/${id}`, { method: 'DELETE' }),
     listDir: (id: string, path: string) =>
@@ -61,8 +89,8 @@ export const api = {
   },
 
   sessions: {
-    listForProject: (projectId: string) =>
-      request<Session[]>(`/api/projects/${projectId}/sessions`),
+    listForProject: (projectId: string, status?: 'open' | 'archived') =>
+      request<Session[]>(`/api/projects/${projectId}/sessions${status ? `?status=${status}` : ''}`),
     create: (
       projectId: string,
       body: { name?: string; model?: string; system_prompt?: string }
@@ -82,24 +110,71 @@ export const api = {
       }),
     remove: (id: string) =>
       request<void>(`/api/sessions/${id}`, { method: 'DELETE' }),
+    archive: (id: string) =>
+      request<void>(`/api/sessions/${id}/archive`, { method: 'POST' }),
+    unarchive: (id: string) =>
+      request<Session>(`/api/sessions/${id}/unarchive`, { method: 'POST' }),
+  },
+
+  chats: {
+    listForSession: (sessionId: string, params?: { status?: 'open' | 'archived' }) =>
+      request<Chat[]>(
+        `/api/sessions/${sessionId}/chats${params?.status ? `?status=${params.status}` : ''}`
+      ),
+    create: (sessionId: string, body?: { name?: string }) =>
+      request<Chat>(`/api/sessions/${sessionId}/chats`, {
+        method: 'POST',
+        body: JSON.stringify(body ?? {}),
+      }),
+    update: (chatId: string, body: { name: string }) =>
+      request<Chat>(`/api/chats/${chatId}`, {
+        method: 'PATCH',
+        body: JSON.stringify(body),
+      }),
+    archive: (chatId: string) =>
+      request<void>(`/api/chats/${chatId}/archive`, { method: 'POST' }),
+    unarchive: (chatId: string) =>
+      request<Chat>(`/api/chats/${chatId}/unarchive`, { method: 'POST' }),
+    remove: (chatId: string) =>
+      request<void>(`/api/chats/${chatId}`, { method: 'DELETE' }),
+    messages: (chatId: string) =>
+      request<Message[]>(`/api/chats/${chatId}/messages`),
+    compact: (chatId: string) =>
+      request<{ compact_message_id: string }>(`/api/chats/${chatId}/compact`, { method: 'POST' }),
+    stop: (chatId: string) =>
+      request<{ stopped: boolean }>(`/api/chats/${chatId}/stop`, { method: 'POST' }),
+    forceSend: (chatId: string, content: string) =>
+      request<{ user_message_id: string; assistant_message_id: string }>(
+        `/api/chats/${chatId}/force_send`,
+        { method: 'POST', body: JSON.stringify({ content }) }
+      ),
+    fork: (chatId: string, body: { messageId: string; name?: string }) =>
+      request<Chat>(`/api/chats/${chatId}/fork`, {
+        method: 'POST',
+        body: JSON.stringify({ message_id: body.messageId, name: body.name }),
+      }),
   },
 
   messages: {
     list: (sessionId: string) =>
       request<Message[]>(`/api/sessions/${sessionId}/messages`),
-    send: (sessionId: string, content: string) =>
+    send: (chatId: string, content: string) =>
       request<{ user_message_id: string; assistant_message_id: string }>(
-        `/api/sessions/${sessionId}/messages`,
+        `/api/chats/${chatId}/messages`,
         {
           method: 'POST',
           body: JSON.stringify({ content }),
         }
       ),
-    regenerate: (sessionId: string, messageId: string) =>
+    regenerate: (chatId: string, messageId: string) =>
       request<{ assistant_message_id: string }>(
-        `/api/sessions/${sessionId}/messages/${messageId}/regenerate`,
+        `/api/chats/${chatId}/messages/${messageId}/regenerate`,
         { method: 'POST' }
       ),
+    remove: (chatId: string, messageId: string) =>
+      request<void>(`/api/chats/${chatId}/messages/${messageId}`, {
+        method: 'DELETE',
+      }),
   },
 
   models: () => request<ModelInfo[]>('/api/models'),
@@ -116,21 +191,4 @@ export const api = {
   sidebar: {
     get: () => request<SidebarResponse>('/api/sidebar'),
   },
-
-  panes: {
-    getForSession: (sessionId: string) =>
-      request<{ panes: Pane[] }>(`/api/sessions/${sessionId}/panes`),
-    create: (sessionId: string, body: PaneCreateRequest) =>
-      request<Pane>(`/api/sessions/${sessionId}/panes`, {
-        method: 'POST',
-        body: JSON.stringify(body),
-      }),
-    update: (id: string, body: PaneUpdateRequest) =>
-      request<Pane>(`/api/panes/${id}`, {
-        method: 'PATCH',
-        body: JSON.stringify(body),
-      }),
-    remove: (id: string) =>
-      request<void>(`/api/panes/${id}`, { method: 'DELETE' }),
-  },
 };

apps/web/src/api/types.ts

@@ -1,9 +1,14 @@
+export const PROJECT_STATUSES = ['open', 'archived'] as const;
+export type ProjectStatus = typeof PROJECT_STATUSES[number];
+
 export interface Project {
   id: string;
   name: string;
   path: string;
   added_at: string;
   last_session_id: string | null;
+  status: ProjectStatus;
+  gitea_remote: string | null;
 }
 
 export interface AvailableProject {
@@ -11,18 +16,38 @@ export interface AvailableProject {
   name: string;
 }
 
+export type SessionStatus = 'open' | 'archived';
+
 export interface Session {
   id: string;
   project_id: string;
   name: string;
   model: string;
   system_prompt: string;
+  status: SessionStatus;
   created_at: string;
   updated_at: string;
 }
 
-export type MessageRole = 'user' | 'assistant' | 'tool';
-export type MessageStatus = 'streaming' | 'complete' | 'failed';
+export const CHAT_STATUSES = ['open', 'archived'] as const;
+export type ChatStatus = typeof CHAT_STATUSES[number];
+
+export interface Chat {
+  id: string;
+  session_id: string;
+  name: string | null;
+  status: ChatStatus;
+  created_at: string;
+  updated_at: string;
+  // Populated by GET /api/sessions/:id/chats only.
+  message_count?: number;
+  last_message_preview?: string | null;
+  effective_context_tokens?: number | null;
+}
+
+export type MessageRole = 'user' | 'assistant' | 'tool' | 'system';
+export type MessageStatus = 'streaming' | 'complete' | 'failed' | 'cancelled';
+export type MessageKind = 'message' | 'compact';
 
 export interface ToolCall {
   id: string;
@@ -40,8 +65,10 @@ export interface ToolResult {
 export interface Message {
   id: string;
   session_id: string;
+  chat_id: string;
   role: MessageRole;
   content: string;
+  kind: MessageKind;
   tool_calls: ToolCall[] | null;
   tool_results: ToolResult | null;
   status: MessageStatus;
@@ -70,6 +97,8 @@ export interface SidebarSession {
 export interface SidebarProject {
   id: string;
   name: string;
+  path: string;
+  gitea_remote: string | null;
   recent_sessions: SidebarSession[];
   total_sessions: number;
 }
@@ -127,14 +156,25 @@ export interface PaneUpdateRequest {
   position?: number;
 }
 
+export type WorkspacePaneKind = 'chat' | 'terminal' | 'agent' | 'empty';
+
+export interface WorkspacePane {
+  id: string;
+  kind: WorkspacePaneKind;
+  chatId?: string;
+  chatIds: string[];
+  activeChatIdx: number;
+}
+
 export type WsFrame =
   | { type: 'snapshot'; messages: Message[] }
-  | { type: 'message_started'; message_id: string; role: MessageRole }
-  | { type: 'delta'; message_id: string; content: string }
-  | { type: 'tool_call'; message_id: string; tool_call: ToolCall }
+  | { type: 'message_started'; message_id: string; chat_id?: string; role: MessageRole }
+  | { type: 'delta'; message_id: string; chat_id?: string; content: string }
+  | { type: 'tool_call'; message_id: string; chat_id?: string; tool_call: ToolCall }
   | {
       type: 'tool_result';
       tool_message_id: string;
+      chat_id?: string;
       tool_call_id: string;
       output: unknown;
       truncated: boolean;
@@ -143,12 +183,14 @@ export type WsFrame =
   | {
       type: 'message_complete';
       message_id: string;
+      chat_id?: string;
       tokens_used?: number | null;
       ctx_used?: number | null;
       ctx_max?: number | null;
       started_at?: string | null;
       finished_at?: string | null;
     }
-  | { type: 'messages_deleted'; message_ids: string[] }
-  | { type: 'session_renamed'; session_id: string; name: string }
-  | { type: 'error'; message_id?: string; error: string };
+  | { type: 'messages_deleted'; message_ids: string[]; chat_id?: string }
+  | { type: 'session_renamed'; session_id: string; name: string; chat_id?: string }
+  | { type: 'chat_renamed'; chat_id: string; name: string }
+  | { type: 'error'; message_id?: string; chat_id?: string; error: string };

apps/web/src/components/AddProjectModal.tsx

@@ -1,7 +1,6 @@
 import { useEffect, useState } from 'react';
 import { api } from '@/api/client';
 import type { AvailableProject } from '@/api/types';
-import { sessionEvents } from '@/hooks/sessionEvents';
 import { Button } from '@/components/ui/button';
 import {
   Dialog,
@@ -43,8 +42,8 @@ export function AddProjectModal({ open, onOpenChange, onAdded }: Props) {
     setBusy(true);
     setError(null);
     try {
-      const created = await api.projects.add({ path });
-      sessionEvents.emit({ type: 'project_created', project: created });
+      await api.projects.add({ path });
+      // Server publishes project_created via WS; let useUserEvents deliver it.
       onAdded();
       onOpenChange(false);
     } catch (err) {

apps/web/src/components/AttachmentChip.tsx

@@ -0,0 +1,41 @@
+import { FileText, X } from 'lucide-react';
+import type { Attachment } from '@/lib/attachments';
+
+interface Props {
+  attachment: Attachment;
+  onRemove: (id: string) => void;
+  onPreview: (attachment: Attachment) => void;
+}
+
+export function AttachmentChip({ attachment, onRemove, onPreview }: Props) {
+  const lineCount = attachment.content.split('\n').length;
+
+  const label =
+    attachment.kind === 'lines' && attachment.range
+      ? `${attachment.filename}:${attachment.range[0]}-${attachment.range[1]}`
+      : attachment.filename;
+
+  return (
+    <div className="flex items-center gap-1.5 bg-muted/60 border border-border rounded px-2 py-0.5 text-xs font-mono">
+      <button
+        type="button"
+        onClick={() => onPreview(attachment)}
+        className="flex items-center gap-1.5 hover:bg-muted/60 transition-colors min-w-0"
+      >
+        <FileText className="size-3 shrink-0 text-muted-foreground" />
+        <span className="truncate max-w-[200px]">{label}</span>
+        <span className="text-muted-foreground whitespace-nowrap">
+          +{lineCount} lines
+        </span>
+      </button>
+      <button
+        type="button"
+        onClick={() => onRemove(attachment.id)}
+        className="ml-0.5 rounded hover:bg-muted-foreground/20 p-0.5 shrink-0"
+        aria-label="Remove attachment"
+      >
+        <X className="size-3" />
+      </button>
+    </div>
+  );
+}

apps/web/src/components/AttachmentPreviewModal.tsx

@@ -0,0 +1,37 @@
+import type { Attachment } from '@/lib/attachments';
+import { CodeBlock } from '@/components/CodeBlock';
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
+
+interface Props {
+  attachment: Attachment | null;
+  onClose: () => void;
+}
+
+export function AttachmentPreviewModal({ attachment, onClose }: Props) {
+  const title = attachment
+    ? attachment.kind === 'lines' && attachment.range
+      ? `${attachment.filename}:${attachment.range[0]}-${attachment.range[1]}`
+      : attachment.filename
+    : '';
+
+  return (
+    <Dialog open={attachment !== null} onOpenChange={() => onClose()}>
+      <DialogContent className="sm:max-w-2xl max-h-[80vh] overflow-y-auto">
+        <DialogHeader>
+          <DialogTitle className="font-mono text-sm">{title}</DialogTitle>
+        </DialogHeader>
+        {attachment && (
+          <CodeBlock
+            code={attachment.content}
+            lang={attachment.language ?? undefined}
+          />
+        )}
+      </DialogContent>
+    </Dialog>
+  );
+}

apps/web/src/components/ChatInput.tsx

@@ -1,25 +1,73 @@
-import { useState, type KeyboardEvent } from 'react';
+import { useCallback, useEffect, useRef, useState, 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 { AttachmentChip } from '@/components/AttachmentChip';
+import { AttachmentPreviewModal } from '@/components/AttachmentPreviewModal';
+import { FileMentionPopover } from '@/components/FileMentionPopover';
+import { api } from '@/api/client';
+import { sessionEvents } from '@/hooks/sessionEvents';
 
 interface Props {
   disabled?: boolean;
+  projectId: string;
   onSend: (content: string) => void | Promise<void>;
+  onForceSend?: (content: string) => void | Promise<void>;
 }
 
-export function ChatInput({ disabled, onSend }: Props) {
+export function ChatInput({ disabled, projectId, onSend, onForceSend }: Props) {
   const [value, setValue] = useState('');
   const [busy, setBusy] = useState(false);
+  const [attachments, setAttachments] = useState<Attachment[]>([]);
+  const [previewAttachment, setPreviewAttachment] = useState<Attachment | null>(null);
+  const [mentionState, setMentionState] = useState<{
+    open: boolean;
+    query: string;
+    atIdx: number;
+    anchorRect: { top: number; left: number };
+  } | null>(null);
+  const [fileIndex, setFileIndex] = useState<string[] | null>(null);
+  const textareaRef = useRef<HTMLTextAreaElement | null>(null);
+
+  function addAttachment(a: Attachment) {
+    setAttachments(prev => {
+      if (prev.length >= 10) {
+        toast.error('Max 10 attachments per message');
+        return prev;
+      }
+      return [...prev, a];
+    });
+  }
+
+  const addAttachmentRef = useRef(addAttachment);
+  addAttachmentRef.current = addAttachment;
+
+  useEffect(() => {
+    return sessionEvents.subscribe((event) => {
+      if (event.type !== 'attach_chat_file') return;
+      addAttachmentRef.current({
+        id: crypto.randomUUID(),
+        ...event.attachment,
+      });
+    });
+  }, []);
+
+  function removeAttachment(id: string) {
+    setAttachments(prev => prev.filter(a => a.id !== id));
+  }
 
   async function submit() {
     const text = value.trim();
-    if (!text || disabled || busy) return;
+    if (!text && attachments.length === 0) return;
+    if (disabled || busy) return;
     setBusy(true);
     try {
-      await onSend(text);
+      const body = flattenToMessage(attachments, text);
+      await onSend(body);
       setValue('');
+      setAttachments([]);
     } catch (err) {
       toast.error(err instanceof Error ? err.message : 'failed to send');
     } finally {
@@ -27,32 +75,198 @@ export function ChatInput({ disabled, onSend }: Props) {
     }
   }
 
+  function getCaretCoords(textarea: HTMLTextAreaElement): { top: number; left: number } {
+    const mirror = document.createElement('div');
+    const style = window.getComputedStyle(textarea);
+
+    const properties = [
+      'fontFamily', 'fontSize', 'fontWeight', 'fontStyle',
+      'letterSpacing', 'lineHeight', 'textTransform', 'wordSpacing',
+      'textIndent', 'paddingTop', 'paddingRight', 'paddingBottom', 'paddingLeft',
+      'borderTopWidth', 'borderRightWidth', 'borderBottomWidth', 'borderLeftWidth',
+      'boxSizing', 'whiteSpace', 'overflowWrap',
+    ] as const;
+
+    mirror.style.position = 'absolute';
+    mirror.style.visibility = 'hidden';
+    mirror.style.overflow = 'hidden';
+    mirror.style.width = style.width;
+    for (const prop of properties) {
+      mirror.style[prop] = style[prop];
+    }
+    mirror.style.whiteSpace = 'pre-wrap';
+    mirror.style.overflowWrap = 'break-word';
+
+    const textBefore = textarea.value.slice(0, textarea.selectionStart);
+    mirror.textContent = textBefore;
+
+    const span = document.createElement('span');
+    span.textContent = '​'; // zero-width space
+    mirror.appendChild(span);
+
+    document.body.appendChild(mirror);
+
+    const taRect = textarea.getBoundingClientRect();
+    const spanRect = span.getBoundingClientRect();
+    const mirrorRect = mirror.getBoundingClientRect();
+
+    const top = taRect.top + (spanRect.top - mirrorRect.top) - textarea.scrollTop + span.offsetHeight;
+    const left = taRect.left + (spanRect.left - mirrorRect.left);
+
+    document.body.removeChild(mirror);
+
+    return { top, left };
+  }
+
+  function handleChange(e: React.ChangeEvent<HTMLTextAreaElement>) {
+    const newValue = e.target.value;
+    setValue(newValue);
+
+    const ta = e.target;
+    const pos = ta.selectionStart;
+
+    // Check for @ trigger
+    if (pos > 0 && newValue[pos - 1] === '@') {
+      const charBefore = pos >= 2 ? newValue[pos - 2] : null;
+      if (charBefore === null || charBefore === ' ' || charBefore === '\n') {
+        const coords = getCaretCoords(ta);
+        setMentionState({ open: true, query: '', atIdx: pos - 1, anchorRect: coords });
+        if (!fileIndex) {
+          api.projects.files(projectId).then(r => setFileIndex(r.files)).catch(() => {});
+        }
+        return;
+      }
+    }
+
+    // Update query if popover is open — use stored atIdx
+    if (mentionState?.open) {
+      const { atIdx } = mentionState;
+      if (atIdx < pos && newValue[atIdx] === '@') {
+        const query = newValue.slice(atIdx + 1, pos);
+        setMentionState(prev => prev ? { ...prev, query } : null);
+      } else {
+        setMentionState(null);
+      }
+    }
+  }
+
+  async function handleMentionSelect(path: string) {
+    const atIdx = mentionState?.atIdx ?? -1;
+    const ta = textareaRef.current;
+    const caretPos = ta?.selectionStart ?? value.length;
+    setMentionState(null);
+
+    try {
+      const result = await api.projects.viewFile(projectId, path);
+      if (atIdx >= 0) {
+        const cleaned = value.slice(0, atIdx) + value.slice(caretPos);
+        setValue(cleaned);
+        if (ta) {
+          requestAnimationFrame(() => {
+            ta.selectionStart = ta.selectionEnd = atIdx;
+            ta.focus();
+          });
+        }
+      }
+      addAttachment({
+        id: crypto.randomUUID(),
+        kind: 'file',
+        filename: path,
+        language: inferLanguage(path),
+        content: result.content,
+        source: '@',
+      });
+    } catch {
+      toast.error('Failed to load file');
+    }
+  }
+
+  const closeMention = useCallback(() => setMentionState(null), []);
+
   function onKeyDown(e: KeyboardEvent<HTMLTextAreaElement>) {
-    if ((e.metaKey || e.ctrlKey) && e.key === 'Enter') {
+    if (mentionState?.open) return;
+    if (e.key === 'Enter' && e.shiftKey && (e.metaKey || e.ctrlKey) && onForceSend) {
+      e.preventDefault();
+      void forceSubmit();
+      return;
+    }
+    if (e.key === 'Enter' && (e.metaKey || e.ctrlKey)) {
+      e.preventDefault();
+      void submit();
+      return;
+    }
+    if (e.key === 'Enter' && !e.shiftKey) {
       e.preventDefault();
       void submit();
     }
   }
 
+  async function forceSubmit() {
+    const text = value.trim();
+    if (!text || !onForceSend) return;
+    if (busy) return;
+    setBusy(true);
+    try {
+      const body = flattenToMessage(attachments, text);
+      await onForceSend(body);
+      setValue('');
+      setAttachments([]);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'force send failed');
+    } finally {
+      setBusy(false);
+    }
+  }
+
   return (
-    <div className="border-t px-4 py-3 flex items-end gap-2">
-      <Textarea
-        value={value}
-        onChange={(e) => setValue(e.target.value)}
-        onKeyDown={onKeyDown}
-        placeholder="Ask about this project. Cmd/Ctrl+Enter to send."
-        disabled={disabled || busy}
-        rows={3}
-        className="resize-none min-h-[68px] max-h-[240px]"
+    <div className="border-t">
+      <div className="max-w-[1000px] mx-auto w-full">
+      {attachments.length > 0 && (
+        <div className="flex flex-wrap gap-1.5 px-4 pt-3">
+          {attachments.map(a => (
+            <AttachmentChip
+              key={a.id}
+              attachment={a}
+              onRemove={removeAttachment}
+              onPreview={setPreviewAttachment}
+            />
+          ))}
+        </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."
+          disabled={disabled || busy}
+          rows={3}
+          className="resize-none min-h-[68px] max-h-[240px]"
+        />
+        <Button
+          onClick={() => void submit()}
+          disabled={disabled || busy || (!value.trim() && attachments.length === 0)}
+          size="icon-lg"
+          aria-label="Send"
+        >
+          <Send />
+        </Button>
+      </div>
+      </div>
+      <AttachmentPreviewModal
+        attachment={previewAttachment}
+        onClose={() => setPreviewAttachment(null)}
       />
-      <Button
-        onClick={() => void submit()}
-        disabled={disabled || busy || !value.trim()}
-        size="icon-lg"
-        aria-label="Send"
-      >
-        <Send />
-      </Button>
+      {mentionState?.open && (
+        <FileMentionPopover
+          query={mentionState.query}
+          files={fileIndex ?? []}
+          anchorRect={mentionState.anchorRect}
+          onSelect={handleMentionSelect}
+          onClose={closeMention}
+        />
+      )}
     </div>
   );
 }

apps/web/src/components/ChatTabBar.tsx

@@ -0,0 +1,177 @@
+import { useState } from 'react';
+import { History, MessageSquare, Plus, X } from 'lucide-react';
+import type { Chat, WorkspacePane } from '@/api/types';
+import {
+  ContextMenu,
+  ContextMenuContent,
+  ContextMenuItem,
+  ContextMenuSeparator,
+  ContextMenuTrigger,
+} from '@/components/ui/context-menu';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  pane: WorkspacePane;
+  tabs: Chat[];
+  onSwitchTab: (tabIdx: number) => void;
+  onRemoveTab: (chatId: string) => void;
+  onCloseOthers: (chatId: string) => void;
+  onCloseToRight: (chatId: string) => void;
+  onCloseAll: () => void;
+  onNewChat: () => void;
+  onShowHistory: () => void;
+  onRename: (chatId: string, name: string) => Promise<void>;
+  onRemovePane?: () => void;
+}
+
+export function ChatTabBar({
+  pane,
+  tabs,
+  onSwitchTab,
+  onRemoveTab,
+  onCloseOthers,
+  onCloseToRight,
+  onCloseAll,
+  onNewChat,
+  onShowHistory,
+  onRename,
+  onRemovePane,
+}: Props) {
+  const [renamingId, setRenamingId] = useState<string | null>(null);
+  const [renameValue, setRenameValue] = useState('');
+
+  function startRename(chatId: string, currentName: string | null) {
+    setRenamingId(chatId);
+    setRenameValue(currentName ?? '');
+  }
+
+  async function finishRename() {
+    if (renamingId && renameValue.trim()) {
+      await onRename(renamingId, renameValue.trim());
+    }
+    setRenamingId(null);
+  }
+
+  return (
+    <div className="flex items-center border-b border-border bg-muted/20 h-8 shrink-0 overflow-x-auto">
+      {tabs.map((chat, tabIdx) => {
+        const isActive = tabIdx === pane.activeChatIdx;
+        const isLast = tabIdx === tabs.length - 1;
+        const onlyTab = tabs.length === 1;
+        const label = chat.name ?? 'New chat';
+        return (
+          <ContextMenu key={chat.id}>
+            <ContextMenuTrigger asChild>
+              <div
+                onClick={() => onSwitchTab(tabIdx)}
+                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
+                    ? 'bg-background text-foreground'
+                    : 'bg-muted/30 text-muted-foreground hover:bg-muted/60'
+                )}
+              >
+                <MessageSquare size={12} className="shrink-0" />
+                {renamingId === chat.id ? (
+                  <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') setRenamingId(null);
+                    }}
+                    onClick={(e) => e.stopPropagation()}
+                    className="bg-transparent border-b border-border text-xs outline-none w-28"
+                  />
+                ) : (
+                  <span className="truncate max-w-[140px]" title={label}>
+                    {label}
+                  </span>
+                )}
+                <button
+                  type="button"
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    onRemoveTab(chat.id);
+                  }}
+                  className="p-0.5 hover:bg-muted rounded opacity-0 group-hover:opacity-60 hover:!opacity-100 shrink-0"
+                  aria-label="Close tab"
+                >
+                  <X size={10} />
+                </button>
+              </div>
+            </ContextMenuTrigger>
+            <ContextMenuContent>
+              <ContextMenuItem onSelect={() => startRename(chat.id, chat.name)}>
+                Rename
+              </ContextMenuItem>
+              <ContextMenuSeparator />
+              <ContextMenuItem onSelect={() => onRemoveTab(chat.id)}>
+                Close
+              </ContextMenuItem>
+              <ContextMenuItem
+                disabled={onlyTab}
+                onSelect={() => onCloseOthers(chat.id)}
+              >
+                Close others
+              </ContextMenuItem>
+              <ContextMenuItem
+                disabled={isLast}
+                onSelect={() => onCloseToRight(chat.id)}
+              >
+                Close to right
+              </ContextMenuItem>
+              <ContextMenuItem onSelect={() => onCloseAll()}>
+                Close all
+              </ContextMenuItem>
+            </ContextMenuContent>
+          </ContextMenu>
+        );
+      })}
+
+      {tabs.length === 0 && (
+        <div className="flex items-center gap-1.5 px-3 py-1.5 text-xs text-muted-foreground">
+          <History size={12} className="shrink-0" />
+          <span>Session</span>
+        </div>
+      )}
+
+      <div className="flex items-center ml-auto gap-0.5 px-1 shrink-0">
+        <button
+          type="button"
+          onClick={onNewChat}
+          className="p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground"
+          aria-label="New chat"
+          title="New chat"
+        >
+          <Plus size={12} />
+        </button>
+        <button
+          type="button"
+          onClick={onShowHistory}
+          className={cn(
+            'p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground',
+            pane.kind === 'empty' && 'text-foreground bg-muted/50'
+          )}
+          aria-label="Session history"
+          title="Session history"
+        >
+          <History size={12} />
+        </button>
+        {onRemovePane && (
+          <button
+            type="button"
+            onClick={onRemovePane}
+            className="p-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground"
+            aria-label="Close pane"
+            title="Close pane"
+          >
+            <X size={12} />
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}

apps/web/src/components/CreateProjectModal.tsx

@@ -0,0 +1,171 @@
+import { useEffect, useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { toast } from 'sonner';
+import { api } from '@/api/client';
+import { Button } from '@/components/ui/button';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+
+interface Props {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+}
+
+function previewFolderName(raw: string): string {
+  return raw
+    .toLowerCase()
+    .trim()
+    .replace(/\s+/g, '-')
+    .replace(/[^a-z0-9-]/g, '')
+    .replace(/-+/g, '-')
+    .replace(/^-+|-+$/g, '')
+    .slice(0, 64);
+}
+
+export function CreateProjectModal({ open, onOpenChange }: Props) {
+  const navigate = useNavigate();
+  const [name, setName] = useState('');
+  const [commitMessage, setCommitMessage] = useState('Initial commit');
+  const [visibility, setVisibility] = useState<'private' | 'public'>('private');
+  const [createRemote, setCreateRemote] = useState(true);
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (!open) return;
+    setName('');
+    setCommitMessage('Initial commit');
+    setVisibility('private');
+    setCreateRemote(true);
+    setBusy(false);
+    setError(null);
+  }, [open]);
+
+  const folderPreview = previewFolderName(name);
+
+  async function submit() {
+    if (!folderPreview) {
+      setError('Project name must contain at least one letter or digit.');
+      return;
+    }
+    setBusy(true);
+    setError(null);
+    try {
+      const result = await api.projects.create({
+        name: name.trim(),
+        commit_message: commitMessage.trim() || 'Initial commit',
+        visibility,
+        create_gitea_remote: createRemote,
+      });
+      const warnings = result.bootstrap.warnings;
+      if (warnings.length > 0) {
+        toast.warning(`Project created with warnings: ${warnings.join('; ')}`);
+      } else {
+        toast.success(`Project "${result.project.name}" created`);
+      }
+      onOpenChange(false);
+      navigate(`/project/${result.project.id}`);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'failed to create project');
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-md">
+        <DialogHeader>
+          <DialogTitle>Create New Project</DialogTitle>
+          <DialogDescription>
+            Creates a folder under /opt with a git repo, .gitignore, and optionally a Gitea remote.
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="space-y-3">
+          <div className="space-y-1.5">
+            <Label htmlFor="proj-name">Project name</Label>
+            <Input
+              id="proj-name"
+              placeholder="My new project"
+              value={name}
+              onChange={(e) => setName(e.target.value)}
+              disabled={busy}
+              autoFocus
+            />
+            {name && (
+              <div className="text-xs text-muted-foreground font-mono">
+                Folder: /opt/{folderPreview || <span className="text-destructive">(empty after sanitization)</span>}
+              </div>
+            )}
+          </div>
+
+          <div className="space-y-1.5">
+            <Label htmlFor="commit-msg">Initial commit message</Label>
+            <Input
+              id="commit-msg"
+              value={commitMessage}
+              onChange={(e) => setCommitMessage(e.target.value)}
+              disabled={busy}
+            />
+          </div>
+
+          <div className="space-y-1.5">
+            <Label>Visibility</Label>
+            <div className="flex gap-4 text-sm">
+              <label className="flex items-center gap-1.5">
+                <input
+                  type="radio"
+                  checked={visibility === 'private'}
+                  onChange={() => setVisibility('private')}
+                  disabled={busy}
+                />
+                Private
+              </label>
+              <label className="flex items-center gap-1.5">
+                <input
+                  type="radio"
+                  checked={visibility === 'public'}
+                  onChange={() => setVisibility('public')}
+                  disabled={busy}
+                />
+                Public
+              </label>
+            </div>
+          </div>
+
+          <label className="flex items-center gap-2 text-sm">
+            <input
+              type="checkbox"
+              checked={createRemote}
+              onChange={(e) => setCreateRemote(e.target.checked)}
+              disabled={busy}
+            />
+            Create Gitea remote and push
+          </label>
+
+          {error && (
+            <div className="text-sm text-destructive">{error}</div>
+          )}
+        </div>
+
+        <DialogFooter>
+          <Button variant="outline" onClick={() => onOpenChange(false)} disabled={busy}>
+            Cancel
+          </Button>
+          <Button onClick={() => void submit()} disabled={busy || !folderPreview}>
+            {busy ? 'Creating…' : 'Create'}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

apps/web/src/components/FileMentionPopover.tsx

@@ -0,0 +1,145 @@
+import { useEffect, useMemo, useRef, useState } from 'react';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  query: string;
+  files: string[];
+  anchorRect: { top: number; left: number };
+  onSelect: (path: string) => void;
+  onClose: () => void;
+}
+
+function filterAndRank(files: string[], query: string): string[] {
+  const q = query.toLowerCase();
+  if (!q) {
+    return files.slice(0, 20);
+  }
+
+  const filenameMatches: string[] = [];
+  const pathOnlyMatches: string[] = [];
+
+  for (const file of files) {
+    const lower = file.toLowerCase();
+    if (!lower.includes(q)) continue;
+    const basename = file.split('/').pop() ?? file;
+    if (basename.toLowerCase().includes(q)) {
+      filenameMatches.push(file);
+    } else {
+      pathOnlyMatches.push(file);
+    }
+  }
+
+  filenameMatches.sort((a, b) => a.localeCompare(b));
+  pathOnlyMatches.sort((a, b) => a.localeCompare(b));
+
+  return [...filenameMatches, ...pathOnlyMatches].slice(0, 20);
+}
+
+export function FileMentionPopover({
+  query,
+  files,
+  anchorRect,
+  onSelect,
+  onClose,
+}: Props) {
+  const [highlightIndex, setHighlightIndex] = useState(0);
+  const popoverRef = useRef<HTMLDivElement>(null);
+  const filtered = useMemo(() => filterAndRank(files, query), [files, query]);
+
+  // Reset highlight when query changes
+  useEffect(() => {
+    setHighlightIndex(0);
+  }, [query]);
+
+  // Keyboard navigation
+  useEffect(() => {
+    function handleKeyDown(e: KeyboardEvent) {
+      if (e.key === 'ArrowDown') {
+        e.preventDefault();
+        setHighlightIndex(prev =>
+          prev < filtered.length - 1 ? prev + 1 : 0
+        );
+      } else if (e.key === 'ArrowUp') {
+        e.preventDefault();
+        setHighlightIndex(prev =>
+          prev > 0 ? prev - 1 : filtered.length - 1
+        );
+      } else if (e.key === 'Enter') {
+        e.preventDefault();
+        if (filtered.length > 0) {
+          onSelect(filtered[highlightIndex] ?? filtered[0]!);
+        }
+      } else if (e.key === 'Escape') {
+        e.preventDefault();
+        onClose();
+      }
+    }
+
+    document.addEventListener('keydown', handleKeyDown);
+    return () => document.removeEventListener('keydown', handleKeyDown);
+  }, [filtered, highlightIndex, onSelect, onClose]);
+
+  // Click outside to close
+  useEffect(() => {
+    function handleMouseDown(e: MouseEvent) {
+      if (
+        popoverRef.current &&
+        !popoverRef.current.contains(e.target as Node)
+      ) {
+        onClose();
+      }
+    }
+
+    document.addEventListener('mousedown', handleMouseDown);
+    return () => document.removeEventListener('mousedown', handleMouseDown);
+  }, [onClose]);
+
+  // Scroll highlighted item into view
+  useEffect(() => {
+    const el = popoverRef.current?.querySelector('[data-highlighted="true"]');
+    if (el) {
+      el.scrollIntoView({ block: 'nearest' });
+    }
+  }, [highlightIndex]);
+
+  if (filtered.length === 0) {
+    return (
+      <div
+        ref={popoverRef}
+        className="fixed z-50 bg-popover border border-border rounded-md shadow min-w-[260px] p-2"
+        style={{ top: anchorRect.top, left: anchorRect.left }}
+      >
+        <div className="text-xs text-muted-foreground px-2 py-1">
+          No matching files
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div
+      ref={popoverRef}
+      className="fixed z-50 bg-popover border border-border rounded-md shadow min-w-[260px] max-h-[240px] overflow-y-auto"
+      style={{ top: anchorRect.top, left: anchorRect.left }}
+    >
+      {filtered.map((file, i) => (
+        <button
+          key={file}
+          type="button"
+          data-highlighted={i === highlightIndex}
+          className={cn(
+            'w-full text-left text-xs font-mono px-2 py-1.5 cursor-pointer',
+            i === highlightIndex && 'bg-muted'
+          )}
+          onMouseEnter={() => setHighlightIndex(i)}
+          onMouseDown={(e) => {
+            e.preventDefault();
+            onSelect(file);
+          }}
+        >
+          {file}
+        </button>
+      ))}
+    </div>
+  );
+}

apps/web/src/components/FileViewerOverlay.tsx

@@ -0,0 +1,241 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
+import { Check, Copy, X, Paperclip } from 'lucide-react';
+import { codeToHtml } from 'shiki';
+import { sessionEvents } from '@/hooks/sessionEvents';
+import { Button } from '@/components/ui/button';
+import { cn } from '@/lib/utils';
+
+interface Props {
+  path: string;
+  content: string;
+  lang: string | null;
+  projectId: string;
+  onClose: () => void;
+  onNavigate: (path: string) => void;
+}
+
+const SHIKI_THEME = 'github-dark';
+
+function splitShikiLines(html: string): string[] {
+  const match = html.match(/<code[^>]*>([\s\S]*)<\/code>/);
+  if (!match) return [];
+  const inner = match[1]!;
+  const lines = inner.split(/(?=<span class="line">)/);
+  return lines.filter(l => l.trim().length > 0);
+}
+
+function basename(path: string): string {
+  const parts = path.split('/');
+  return parts[parts.length - 1] ?? path;
+}
+
+export function FileViewerOverlay({ path, content, lang, onClose }: Props) {
+  const [copied, setCopied] = useState(false);
+  const [lineHtmls, setLineHtmls] = useState<string[] | null>(null);
+  const [selectedLines, setSelectedLines] = useState<Set<number>>(new Set());
+  const [showAttachPopover, setShowAttachPopover] = useState(false);
+  const draggingRef = useRef(false);
+  const dragStartRef = useRef<number | null>(null);
+  const overlayRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    setSelectedLines(new Set());
+    setShowAttachPopover(false);
+    if (!lang) { setLineHtmls(null); return; }
+    let cancelled = false;
+    (async () => {
+      try {
+        const result = await codeToHtml(content, { lang, theme: SHIKI_THEME });
+        if (!cancelled) {
+          const lines = splitShikiLines(result);
+          setLineHtmls(lines.length > 0 ? lines : null);
+        }
+      } catch { if (!cancelled) setLineHtmls(null); }
+    })();
+    return () => { cancelled = true; };
+  }, [content, lang]);
+
+  const plainLines = content.split('\n');
+  const totalLines = lineHtmls ? lineHtmls.length : plainLines.length;
+
+  async function copyAll() {
+    try {
+      await navigator.clipboard.writeText(content);
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1200);
+    } catch { /* ignore */ }
+  }
+
+  function handleLineMouseDown(lineNo: number, e: React.MouseEvent) {
+    if (e.shiftKey && dragStartRef.current !== null) {
+      const start = dragStartRef.current;
+      const min = Math.min(start, lineNo);
+      const max = Math.max(start, lineNo);
+      const next = new Set<number>();
+      for (let i = min; i <= max; i++) next.add(i);
+      setSelectedLines(next);
+      setShowAttachPopover(true);
+      return;
+    }
+    draggingRef.current = true;
+    dragStartRef.current = lineNo;
+    setSelectedLines(new Set([lineNo]));
+    setShowAttachPopover(false);
+  }
+
+  function handleLineMouseEnter(lineNo: number) {
+    if (!draggingRef.current || dragStartRef.current === null) return;
+    const start = dragStartRef.current;
+    const min = Math.min(start, lineNo);
+    const max = Math.max(start, lineNo);
+    const next = new Set<number>();
+    for (let i = min; i <= max; i++) next.add(i);
+    setSelectedLines(next);
+  }
+
+  const handleMouseUp = useCallback(() => {
+    if (draggingRef.current) {
+      draggingRef.current = false;
+      if (selectedLines.size > 0) setShowAttachPopover(true);
+    }
+  }, [selectedLines.size]);
+
+  useEffect(() => {
+    document.addEventListener('mouseup', handleMouseUp);
+    return () => document.removeEventListener('mouseup', handleMouseUp);
+  }, [handleMouseUp]);
+
+  useEffect(() => {
+    function handleClick(e: MouseEvent) {
+      if (overlayRef.current && !overlayRef.current.contains(e.target as Node)) {
+        onClose();
+      }
+    }
+    document.addEventListener('mousedown', handleClick);
+    return () => document.removeEventListener('mousedown', handleClick);
+  }, [onClose]);
+
+  useEffect(() => {
+    function handleKey(e: KeyboardEvent) {
+      if (e.key === 'Escape') onClose();
+    }
+    document.addEventListener('keydown', handleKey);
+    return () => document.removeEventListener('keydown', handleKey);
+  }, [onClose]);
+
+  function getSelectionRange(): { min: number; max: number } | null {
+    if (selectedLines.size === 0) return null;
+    let min = Infinity;
+    let max = -Infinity;
+    for (const n of selectedLines) {
+      if (n < min) min = n;
+      if (n > max) max = n;
+    }
+    return { min, max };
+  }
+
+  function handleAttach() {
+    const range = getSelectionRange();
+    if (!range) return;
+    const lines = content.split('\n').slice(range.min - 1, range.max);
+    sessionEvents.emit({
+      type: 'attach_chat_file',
+      attachment: {
+        kind: 'lines',
+        filename: path,
+        language: lang,
+        content: lines.join('\n'),
+        range: [range.min, range.max],
+        source: 'line-select',
+      },
+    });
+    setSelectedLines(new Set());
+    setShowAttachPopover(false);
+  }
+
+  const range = getSelectionRange();
+  const attachLabel = range
+    ? range.min === range.max
+      ? `Attach line ${range.min} to chat`
+      : `Attach lines ${range.min}–${range.max} to chat`
+    : '';
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-start justify-center pt-12 pb-12">
+      <div className="absolute inset-0 bg-black/40" />
+      <div
+        ref={overlayRef}
+        className="relative bg-background border rounded-lg shadow-xl flex flex-col w-[80vw] max-w-[1000px] max-h-[80vh] overflow-hidden"
+      >
+        <div className="flex items-center gap-2 px-4 py-2 border-b shrink-0">
+          <span className="text-sm font-medium truncate flex-1" title={path}>
+            {basename(path)}
+          </span>
+          <span className="text-xs text-muted-foreground truncate">{path}</span>
+          <button
+            type="button"
+            onClick={() => void copyAll()}
+            className="flex items-center gap-1 text-xs px-2 py-1 rounded hover:bg-muted"
+          >
+            {copied ? <Check size={12} /> : <Copy size={12} />}
+            {copied ? 'Copied' : 'Copy'}
+          </button>
+          <button
+            type="button"
+            onClick={onClose}
+            className="p-1 rounded hover:bg-muted"
+            aria-label="Close"
+          >
+            <X size={16} />
+          </button>
+        </div>
+
+        {/* Shiki-highlighted code lines are generated from source code files, not user content */}
+        <div className="flex-1 overflow-auto text-sm font-mono select-none">
+          {Array.from({ length: totalLines }, (_, i) => {
+            const lineNo = i + 1;
+            const isSelected = selectedLines.has(lineNo);
+            return (
+              <div
+                key={lineNo}
+                className={cn('flex', isSelected && 'bg-blue-500/10')}
+                onMouseDown={(e) => handleLineMouseDown(lineNo, e)}
+                onMouseEnter={() => handleLineMouseEnter(lineNo)}
+              >
+                <div
+                  className="shrink-0 w-[3.5ch] text-right pr-2 text-xs text-muted-foreground select-none cursor-pointer hover:text-foreground"
+                  style={{ fontVariantNumeric: 'tabular-nums' }}
+                >
+                  {lineNo}
+                </div>
+                {lineHtmls ? (
+                  <div
+                    className="flex-1 min-w-0 text-xs leading-relaxed [&>.line]:!bg-transparent"
+                    dangerouslySetInnerHTML={{ __html: lineHtmls[i] ?? '' }}
+                  />
+                ) : (
+                  <span className="flex-1 min-w-0 text-xs leading-relaxed whitespace-pre">
+                    {plainLines[i] ?? ''}
+                  </span>
+                )}
+              </div>
+            );
+          })}
+        </div>
+
+        {showAttachPopover && range && (
+          <div className="sticky bottom-0 border-t bg-background px-4 py-2 flex items-center gap-2">
+            <Paperclip size={14} className="text-muted-foreground" />
+            <span className="text-xs flex-1">{attachLabel}</span>
+            <Button size="sm" onClick={handleAttach}>
+              Attach
+            </Button>
+            <Button size="sm" variant="ghost" onClick={() => { setSelectedLines(new Set()); setShowAttachPopover(false); }}>
+              Cancel
+            </Button>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

apps/web/src/components/MessageBubble.tsx

@@ -2,13 +2,22 @@ import { Children, cloneElement, isValidElement, useState } from 'react';
 import type { ReactElement, ReactNode } from 'react';
 import Markdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
-import { Copy, RefreshCw, Check } from 'lucide-react';
+import { ChevronDown, ChevronRight, Copy, RefreshCw, Check, Share2, RotateCw, GitFork, Trash2 } from 'lucide-react';
 import { toast } from 'sonner';
-import type { Message } from '@/api/types';
+import type { Chat, Message } from '@/api/types';
 import { api } from '@/api/client';
 import { sessionEvents } from '@/hooks/sessionEvents';
 import { ToolCallCard } from './ToolCallCard';
 import { CodeBlock } from './CodeBlock';
+import { Button } from '@/components/ui/button';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
 
 // 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
@@ -84,7 +93,7 @@ function linkifyChildren(children: ReactNode, keyPrefix = 'l'): ReactNode {
 
 interface Props {
   message: Message;
-  sessionId: string;
+  sessionChats?: Chat[];
 }
 
 function MarkdownBody({ content }: { content: string }) {
@@ -193,13 +202,14 @@ function StatsLine({ message }: { message: Message }) {
 
 function ActionRow({
   message,
-  sessionId,
 }: {
   message: Message;
-  sessionId: string;
 }) {
   const [justCopied, setJustCopied] = useState(false);
   const [regenerating, setRegenerating] = useState(false);
+  const [forking, setForking] = useState(false);
+  const [deleteOpen, setDeleteOpen] = useState(false);
+  const [deleting, setDeleting] = useState(false);
 
   async function copy() {
     try {
@@ -215,7 +225,7 @@ function ActionRow({
     if (regenerating || message.status === 'streaming') return;
     setRegenerating(true);
     try {
-      await api.messages.regenerate(sessionId, message.id);
+      await api.messages.regenerate(message.chat_id, message.id);
     } catch (err) {
       toast.error(err instanceof Error ? err.message : 'regenerate failed');
     } finally {
@@ -223,37 +233,242 @@ function ActionRow({
     }
   }
 
+  async function fork() {
+    if (forking || message.status !== 'complete') return;
+    setForking(true);
+    try {
+      const chat = await api.chats.fork(message.chat_id, { messageId: message.id });
+      sessionEvents.emit({ type: 'open_chat_in_active_pane', chat_id: chat.id });
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'fork failed');
+    } finally {
+      setForking(false);
+    }
+  }
+
+  async function confirmDelete() {
+    if (deleting) return;
+    setDeleting(true);
+    try {
+      await api.messages.remove(message.chat_id, message.id);
+      setDeleteOpen(false);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'delete failed');
+    } finally {
+      setDeleting(false);
+    }
+  }
+
   const isAssistant = message.role === 'assistant';
   const canRegen = isAssistant && message.status !== 'streaming';
+  const canFork = message.status === 'complete';
+  const canDelete = message.status !== 'streaming';
 
   return (
-    <div className="flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
-      <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"
-        aria-label="Copy message"
-        title="Copy"
-      >
-        {justCopied ? <Check className="size-3" /> : <Copy className="size-3" />}
-      </button>
-      {isAssistant && (
+    <>
+      <div className="flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
         <button
           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"
-          aria-label="Regenerate message"
-          title="Regenerate"
+          onClick={() => void copy()}
+          className="inline-flex items-center justify-center size-6 rounded text-muted-foreground hover:bg-muted hover:text-foreground"
+          aria-label="Copy message"
+          title="Copy"
         >
-          <RefreshCw className={`size-3 ${regenerating ? 'animate-spin' : ''}`} />
+          {justCopied ? <Check className="size-3" /> : <Copy className="size-3" />}
         </button>
+        {isAssistant && (
+          <button
+            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"
+            aria-label="Regenerate message"
+            title="Regenerate"
+          >
+            <RefreshCw className={`size-3 ${regenerating ? 'animate-spin' : ''}`} />
+          </button>
+        )}
+        <button
+          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"
+          aria-label="Fork from here"
+          title="Fork from here"
+        >
+          <GitFork className="size-3" />
+        </button>
+        <button
+          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"
+          aria-label="Delete message"
+          title="Delete message"
+        >
+          <Trash2 className="size-3" />
+        </button>
+      </div>
+      <Dialog
+        open={deleteOpen}
+        onOpenChange={(open) => {
+          if (!deleting) setDeleteOpen(open);
+        }}
+      >
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Delete this message and all messages after it?</DialogTitle>
+            <DialogDescription>
+              This removes the selected message and every later message in this chat. This cannot be undone.
+            </DialogDescription>
+          </DialogHeader>
+          <DialogFooter>
+            <Button
+              variant="outline"
+              onClick={() => setDeleteOpen(false)}
+              disabled={deleting}
+            >
+              Cancel
+            </Button>
+            <Button
+              variant="destructive"
+              onClick={() => void confirmDelete()}
+              disabled={deleting}
+            >
+              {deleting ? 'Deleting…' : 'Delete'}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </>
+  );
+}
+
+function CompactCard({ message, sessionChats }: { message: Message; sessionChats?: Chat[] }) {
+  const [expanded, setExpanded] = useState(false);
+  const [copied, setCopied] = useState(false);
+  const [shareOpen, setShareOpen] = useState(false);
+  const [rerunning, setRerunning] = useState(false);
+
+  const headerMatch = message.content.match(/^\[Context compacted — (\d+) messages summarized\]/);
+  const headerText = headerMatch ? headerMatch[0] : 'Context compacted';
+  const summaryText = headerMatch
+    ? message.content.slice(headerMatch[0].length).trim()
+    : message.content;
+
+  async function handleCopy() {
+    try {
+      await navigator.clipboard.writeText(summaryText);
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1200);
+      toast.success('Summary copied to clipboard');
+    } catch {
+      toast.error('Copy failed');
+    }
+  }
+
+  async function handleShareToChat(chat: Chat) {
+    try {
+      await api.messages.send(chat.id, summaryText);
+      toast.success(`Summary sent to ${chat.name ?? 'New chat'}`);
+      setShareOpen(false);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Failed to share');
+    }
+  }
+
+  async function handleRerun() {
+    if (rerunning) return;
+    setRerunning(true);
+    try {
+      await api.chats.compact(message.chat_id);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Re-run failed');
+    } finally {
+      setRerunning(false);
+    }
+  }
+
+  const otherChats = (sessionChats ?? []).filter(
+    (c) => c.id !== message.chat_id && c.status === 'open'
+  );
+
+  return (
+    <div className="rounded-lg border bg-muted/30 text-sm">
+      <div className="flex items-center gap-2 px-3 py-2">
+        <button
+          type="button"
+          onClick={() => setExpanded(!expanded)}
+          className="flex items-center gap-1.5 flex-1 min-w-0 text-left text-muted-foreground hover:text-foreground"
+        >
+          {expanded ? <ChevronDown size={14} /> : <ChevronRight size={14} />}
+          <span className="text-xs font-medium truncate">{headerText}</span>
+        </button>
+        <button
+          type="button"
+          onClick={() => void handleCopy()}
+          className="p-1 rounded hover:bg-muted text-muted-foreground"
+          aria-label="Copy summary"
+          title="Copy summary"
+        >
+          {copied ? <Check size={12} /> : <Copy size={12} />}
+        </button>
+        <div className="relative">
+          <button
+            type="button"
+            onClick={() => setShareOpen(!shareOpen)}
+            className="p-1 rounded hover:bg-muted text-muted-foreground"
+            aria-label="Send to chat"
+            title="Send to chat"
+          >
+            <Share2 size={12} />
+          </button>
+          {shareOpen && (
+            <div className="absolute right-0 top-full mt-1 z-50 bg-popover border rounded-md shadow-md min-w-[180px] py-1">
+              {otherChats.length === 0 ? (
+                <div className="px-3 py-1.5 text-xs text-muted-foreground">
+                  No other chats in this session
+                </div>
+              ) : (
+                otherChats.map((c) => (
+                  <button
+                    key={c.id}
+                    type="button"
+                    onClick={() => void handleShareToChat(c)}
+                    className="w-full text-left px-3 py-1.5 text-xs hover:bg-accent truncate"
+                  >
+                    {c.name ?? 'New chat'}
+                  </button>
+                ))
+              )}
+            </div>
+          )}
+        </div>
+        <button
+          type="button"
+          onClick={() => void handleRerun()}
+          disabled={rerunning}
+          className="p-1 rounded hover:bg-muted text-muted-foreground disabled:opacity-40"
+          aria-label="Re-run compact"
+          title="Re-run compact"
+        >
+          <RotateCw size={12} className={rerunning ? 'animate-spin' : ''} />
+        </button>
+      </div>
+      {expanded && (
+        <div className="px-3 pb-3 text-xs leading-relaxed text-muted-foreground whitespace-pre-wrap border-t pt-2">
+          {summaryText}
+        </div>
       )}
     </div>
   );
 }
 
-export function MessageBubble({ message, sessionId }: Props) {
+export function MessageBubble({ message, sessionChats }: Props) {
+  if (message.kind === 'compact') {
+    return <CompactCard message={message} sessionChats={sessionChats} />;
+  }
+
   if (message.role === 'tool') {
     return <ToolCallCard message={message} />;
   }
@@ -264,7 +479,7 @@ export function MessageBubble({ message, sessionId }: Props) {
         <div className="max-w-[80%] rounded-lg bg-primary text-primary-foreground px-3 py-2 text-sm whitespace-pre-wrap">
           {message.content}
         </div>
-        <ActionRow message={message} sessionId={sessionId} />
+        <ActionRow message={message} />
       </div>
     );
   }
@@ -292,7 +507,7 @@ export function MessageBubble({ message, sessionId }: Props) {
       )}
       {!isStreaming && <StatsLine message={message} />}
       {!isStreaming && (hasContent || hasToolCalls) && (
-        <ActionRow message={message} sessionId={sessionId} />
+        <ActionRow message={message} />
       )}
     </div>
   );

apps/web/src/components/MessageList.tsx

@@ -1,13 +1,13 @@
 import { useEffect, useRef } from 'react';
-import type { Message } from '@/api/types';
+import type { Chat, Message } from '@/api/types';
 import { MessageBubble } from './MessageBubble';
 
 interface Props {
   messages: Message[];
-  sessionId: string;
+  sessionChats?: Chat[];
 }
 
-export function MessageList({ messages, sessionId }: Props) {
+export function MessageList({ messages, sessionChats }: Props) {
   const endRef = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
@@ -23,11 +23,13 @@ export function MessageList({ messages, sessionId }: Props) {
   }
 
   return (
-    <div className="flex-1 overflow-y-auto px-6 py-4 space-y-4">
-      {messages.map((m) => (
-        <MessageBubble key={m.id} message={m} sessionId={sessionId} />
-      ))}
-      <div ref={endRef} />
+    <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} />
+        ))}
+        <div ref={endRef} />
+      </div>
     </div>
   );
 }

apps/web/src/components/PaneTab.tsx

@@ -1,116 +0,0 @@
-import type { DragEvent } from 'react';
-import { FolderOpen, MessageSquare, X } from 'lucide-react';
-import type { Pane, PaneKind } from '@/api/types';
-import { cn } from '@/lib/utils';
-import {
-  ContextMenu,
-  ContextMenuContent,
-  ContextMenuItem,
-  ContextMenuSeparator,
-  ContextMenuSub,
-  ContextMenuSubContent,
-  ContextMenuSubTrigger,
-  ContextMenuTrigger,
-} from '@/components/ui/context-menu';
-
-interface Props {
-  pane: Pane;
-  isActive: boolean;
-  onClick: () => void;
-  onClose: () => void;
-  onSplit: (kind: PaneKind) => void;
-  onCloseOthers: () => void;
-  onCloseToRight: () => void;
-  onCloseAll: () => void;
-  onDragStart: (e: DragEvent<HTMLDivElement>) => void;
-  onDragOver: (e: DragEvent<HTMLDivElement>) => void;
-  onDrop: (e: DragEvent<HTMLDivElement>) => void;
-}
-
-function basename(path: string): string {
-  if (!path) return '';
-  const parts = path.split('/');
-  return parts[parts.length - 1] ?? path;
-}
-
-function labelFor(pane: Pane): string {
-  if (pane.kind === 'chat') return 'Chat';
-  const openFile = pane.state.open_file;
-  if (openFile) return basename(openFile);
-  return 'Files';
-}
-
-export function PaneTab({
-  pane,
-  isActive,
-  onClick,
-  onClose,
-  onSplit,
-  onCloseOthers,
-  onCloseToRight,
-  onCloseAll,
-  onDragStart,
-  onDragOver,
-  onDrop,
-}: Props) {
-  const Icon = pane.kind === 'chat' ? MessageSquare : FolderOpen;
-  const label = labelFor(pane);
-
-  return (
-    <ContextMenu>
-      <ContextMenuTrigger asChild>
-        <div
-          draggable
-          onDragStart={onDragStart}
-          onDragOver={onDragOver}
-          onDrop={onDrop}
-          onClick={onClick}
-          className={cn(
-            'group flex items-center gap-1.5 px-3 py-1.5 text-xs border-r border-border cursor-default select-none',
-            isActive
-              ? 'bg-background text-foreground'
-              : 'bg-muted/30 text-muted-foreground hover:bg-muted/60'
-          )}
-          role="tab"
-          aria-selected={isActive}
-        >
-          <Icon size={12} className="shrink-0" />
-          <span className="truncate max-w-[160px]" title={label}>
-            {label}
-          </span>
-          <button
-            type="button"
-            onClick={(e) => {
-              e.stopPropagation();
-              onClose();
-            }}
-            className="p-0.5 hover:bg-muted rounded opacity-60 hover:opacity-100 shrink-0"
-            aria-label="Close tab"
-          >
-            <X size={10} />
-          </button>
-        </div>
-      </ContextMenuTrigger>
-      <ContextMenuContent>
-        <ContextMenuSub>
-          <ContextMenuSubTrigger>Split</ContextMenuSubTrigger>
-          <ContextMenuSubContent>
-            <ContextMenuItem onSelect={() => onSplit('chat')}>
-              <MessageSquare /> Chat
-            </ContextMenuItem>
-            <ContextMenuItem onSelect={() => onSplit('file_browser')}>
-              <FolderOpen /> File Browser
-            </ContextMenuItem>
-          </ContextMenuSubContent>
-        </ContextMenuSub>
-        <ContextMenuSeparator />
-        <ContextMenuItem onSelect={onClose}>Close</ContextMenuItem>
-        <ContextMenuItem onSelect={onCloseOthers}>Close others</ContextMenuItem>
-        <ContextMenuItem onSelect={onCloseToRight}>
-          Close to the right
-        </ContextMenuItem>
-        <ContextMenuItem onSelect={onCloseAll}>Close all</ContextMenuItem>
-      </ContextMenuContent>
-    </ContextMenu>
-  );
-}

apps/web/src/components/ProjectSidebar.tsx

@@ -1,19 +1,28 @@
 import { useEffect, useMemo, useRef, useState } from 'react';
 import { NavLink, useLocation, useNavigate } from 'react-router-dom';
-import { ChevronRight, Folder, MessageSquare, Plus } from 'lucide-react';
+import { ChevronRight, ExternalLink, Folder, MessageSquare, Plus } from 'lucide-react';
 import { toast } from 'sonner';
 import { Button } from '@/components/ui/button';
 import {
-  DropdownMenu,
-  DropdownMenuContent,
-  DropdownMenuItem,
-  DropdownMenuTrigger,
-} from '@/components/ui/dropdown-menu';
+  ContextMenu,
+  ContextMenuContent,
+  ContextMenuItem,
+  ContextMenuSeparator,
+  ContextMenuTrigger,
+} from '@/components/ui/context-menu';
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+  DialogDescription,
+} from '@/components/ui/dialog';
 import { AddProjectModal } from './AddProjectModal';
 import { api } from '@/api/client';
 import { sessionEvents } from '@/hooks/sessionEvents';
 import { useSidebar } from '@/hooks/useSidebar';
 import type { SidebarProject } from '@/api/types';
+import { giteaUrlFor } from '@/lib/projectUrls';
 import { cn } from '@/lib/utils';
 
 const EXPANDED_KEY = 'boocode.sidebar.expanded';
@@ -91,6 +100,12 @@ export function ProjectSidebar() {
     useSidebar();
   const [addOpen, setAddOpen] = useState(false);
   const [expanded, setExpanded] = useState<Set<string>>(() => readExpanded());
+  const [renamingSession, setRenamingSession] = useState<string | null>(null);
+  const [renameValue, setRenameValue] = useState('');
+  const [deleteConfirm, setDeleteConfirm] = useState<{ id: string; name: string } | null>(null);
+  const [renamingProject, setRenamingProject] = useState<string | null>(null);
+  const [renameProjectValue, setRenameProjectValue] = useState('');
+  const [archiveProjectConfirm, setArchiveProjectConfirm] = useState<{ id: string; name: string } | null>(null);
   const navigate = useNavigate();
   const location = useLocation();
   const lastToastedError = useRef<string | null>(null);
@@ -123,13 +138,57 @@ export function ProjectSidebar() {
     });
   }
 
-  async function handleRemove(id: string) {
+  async function handleArchiveProject(id: string) {
     try {
-      await api.projects.remove(id);
-      sessionEvents.emit({ type: 'project_deleted', project_id: id });
-      navigate('/');
+      await api.projects.archive(id);
+      // Server publishes project_archived via WS.
+      if (activeProject === id) navigate('/');
     } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'failed to remove project');
+      toast.error(err instanceof Error ? err.message : 'failed to archive project');
+    }
+  }
+
+  async function handleRenameProject(id: string) {
+    const trimmed = renameProjectValue.trim();
+    setRenamingProject(null);
+    if (!trimmed) return;
+    try {
+      await api.projects.update(id, { name: trimmed });
+      // Server publishes project_updated via WS.
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'failed to rename project');
+    }
+  }
+
+  async function handleArchiveSession(sessionId: string, projectId: string) {
+    try {
+      await api.sessions.archive(sessionId);
+      // Server publishes session_archived via WS; useUserEvents delivers it.
+      if (activeSession === sessionId) navigate(`/project/${projectId}`);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'failed to archive session');
+    }
+  }
+
+  async function handleDeleteSession(sessionId: string, projectId: string) {
+    try {
+      await api.sessions.remove(sessionId);
+      // Server publishes session_deleted via WS; useUserEvents delivers it.
+      if (activeSession === sessionId) navigate(`/project/${projectId}`);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'failed to delete session');
+    }
+  }
+
+  async function handleRenameSession(sessionId: string) {
+    const trimmed = renameValue.trim();
+    setRenamingSession(null);
+    if (!trimmed) return;
+    try {
+      await api.sessions.update(sessionId, { name: trimmed });
+      sessionEvents.emit({ type: 'session_renamed', session_id: sessionId, name: trimmed });
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'failed to rename session');
     }
   }
 
@@ -175,67 +234,126 @@ export function ProjectSidebar() {
             const visible = p.recent_sessions.slice(0, MAX_VISIBLE_SESSIONS);
             return (
               <div key={p.id} className="px-2">
-                <DropdownMenu>
-                  <div
-                    className={`group flex items-center gap-1 rounded-md px-2 py-1.5 text-sm ${rowCls(isActiveProject)}`}
-                    onContextMenu={(e) => {
-                      e.preventDefault();
-                      (
-                        e.currentTarget.parentElement?.querySelector(
-                          '[data-ctxtrigger]'
-                        ) as HTMLElement | null
-                      )?.click();
-                    }}
-                  >
-                    <button
-                      type="button"
-                      aria-label={isExpanded ? 'Collapse' : 'Expand'}
-                      aria-expanded={isExpanded}
-                      disabled={isActiveProject}
-                      onClick={(e) => {
-                        e.stopPropagation();
-                        if (isActiveProject) return;
-                        toggle(p.id);
-                      }}
-                      className={cn(
-                        'flex items-center justify-center size-4 shrink-0 opacity-70 hover:opacity-100',
-                        isActiveProject &&
-                          'opacity-50 cursor-not-allowed hover:opacity-50'
-                      )}
+                <ContextMenu>
+                  <ContextMenuTrigger asChild>
+                    <div
+                      className={`group flex items-center gap-1 rounded-md px-2 py-1.5 text-sm ${rowCls(isActiveProject)}`}
                     >
-                      <ChevronRight
-                        className={`size-3.5 transition-transform ${isExpanded ? 'rotate-90' : ''}`}
-                      />
-                    </button>
-                    <NavLink to={`/project/${p.id}`} className="flex items-center gap-2 min-w-0 flex-1">
-                      <Folder className="size-3.5 shrink-0 opacity-70" />
-                      <span className="truncate" title={p.name}>{p.name}</span>
-                    </NavLink>
-                  </div>
-                  <DropdownMenuTrigger asChild>
-                    <button data-ctxtrigger className="hidden" aria-hidden />
-                  </DropdownMenuTrigger>
-                  <DropdownMenuContent align="start">
-                    <DropdownMenuItem variant="destructive" onClick={() => void handleRemove(p.id)}>
-                      Remove from sidebar
-                    </DropdownMenuItem>
-                  </DropdownMenuContent>
-                </DropdownMenu>
+                      <button
+                        type="button"
+                        aria-label={isExpanded ? 'Collapse' : 'Expand'}
+                        aria-expanded={isExpanded}
+                        disabled={isActiveProject}
+                        onClick={(e) => {
+                          e.stopPropagation();
+                          if (isActiveProject) return;
+                          toggle(p.id);
+                        }}
+                        className={cn(
+                          'flex items-center justify-center size-4 shrink-0 opacity-70 hover:opacity-100',
+                          isActiveProject &&
+                            'opacity-50 cursor-not-allowed hover:opacity-50'
+                        )}
+                      >
+                        <ChevronRight
+                          className={`size-3.5 transition-transform ${isExpanded ? 'rotate-90' : ''}`}
+                        />
+                      </button>
+                      {renamingProject === p.id ? (
+                        <div className="flex items-center gap-2 min-w-0 flex-1">
+                          <Folder className="size-3.5 shrink-0 opacity-70" />
+                          <input
+                            autoFocus
+                            value={renameProjectValue}
+                            onChange={(e) => setRenameProjectValue(e.target.value)}
+                            onBlur={() => void handleRenameProject(p.id)}
+                            onKeyDown={(e) => {
+                              if (e.key === 'Enter') void handleRenameProject(p.id);
+                              if (e.key === 'Escape') setRenamingProject(null);
+                            }}
+                            className="bg-transparent border-b border-border text-sm outline-none flex-1 min-w-0"
+                          />
+                        </div>
+                      ) : (
+                        <NavLink to={`/project/${p.id}`} className="flex items-center gap-2 min-w-0 flex-1">
+                          <Folder className="size-3.5 shrink-0 opacity-70" />
+                          <span className="truncate" title={p.name}>{p.name}</span>
+                        </NavLink>
+                      )}
+                    </div>
+                  </ContextMenuTrigger>
+                  <ContextMenuContent>
+                    <ContextMenuItem onSelect={() => {
+                      setRenamingProject(p.id);
+                      setRenameProjectValue(p.name);
+                    }}>
+                      Rename
+                    </ContextMenuItem>
+                    <ContextMenuItem onSelect={() => setArchiveProjectConfirm({ id: p.id, name: p.name })}>
+                      Archive
+                    </ContextMenuItem>
+                    <ContextMenuSeparator />
+                    <ContextMenuItem onSelect={() => {
+                      const url = giteaUrlFor({ path: p.path, gitea_remote: p.gitea_remote });
+                      window.open(url, '_blank', 'noopener');
+                    }}>
+                      <ExternalLink size={12} /> Open in Gitea
+                    </ContextMenuItem>
+                  </ContextMenuContent>
+                </ContextMenu>
 
                 {isExpanded && (
                   <div className="ml-5 mt-0.5 space-y-0.5">
                     {visible.map((s) => (
-                      <NavLink
-                        key={s.id}
-                        to={`/session/${s.id}`}
-                        className={`flex items-center gap-2 rounded-md px-2 py-1 text-sm min-w-0 ${rowCls(activeSession === s.id)}`}
-                      >
-                        <MessageSquare className="size-3.5 shrink-0 opacity-70" />
-                        <span className="truncate flex-1" title={s.name}>{s.name}</span>
-                        <span className="text-xs text-muted-foreground shrink-0 tabular-nums">
-                          {relTime(s.updated_at)}
-                        </span>
-                      </NavLink>
+                      <ContextMenu key={s.id}>
+                        <ContextMenuTrigger asChild>
+                          {renamingSession === s.id ? (
+                            <div className={`flex items-center gap-2 rounded-md px-2 py-1 text-sm min-w-0 ${rowCls(activeSession === s.id)}`}>
+                              <MessageSquare className="size-3.5 shrink-0 opacity-70" />
+                              <input
+                                autoFocus
+                                value={renameValue}
+                                onChange={(e) => setRenameValue(e.target.value)}
+                                onBlur={() => void handleRenameSession(s.id)}
+                                onKeyDown={(e) => {
+                                  if (e.key === 'Enter') void handleRenameSession(s.id);
+                                  if (e.key === 'Escape') setRenamingSession(null);
+                                }}
+                                className="bg-transparent border-b border-border text-sm outline-none flex-1 min-w-0"
+                              />
+                            </div>
+                          ) : (
+                            <NavLink
+                              to={`/session/${s.id}`}
+                              className={`flex items-center gap-2 rounded-md px-2 py-1 text-sm min-w-0 ${rowCls(activeSession === s.id)}`}
+                            >
+                              <MessageSquare className="size-3.5 shrink-0 opacity-70" />
+                              <span className="truncate flex-1" title={s.name}>{s.name}</span>
+                              <span className="text-xs text-muted-foreground shrink-0 tabular-nums">
+                                {relTime(s.updated_at)}
+                              </span>
+                            </NavLink>
+                          )}
+                        </ContextMenuTrigger>
+                        <ContextMenuContent>
+                          <ContextMenuItem onSelect={() => {
+                            setRenamingSession(s.id);
+                            setRenameValue(s.name);
+                          }}>
+                            Rename
+                          </ContextMenuItem>
+                          <ContextMenuItem onSelect={() => void handleArchiveSession(s.id, p.id)}>
+                            Archive
+                          </ContextMenuItem>
+                          <ContextMenuSeparator />
+                          <ContextMenuItem
+                            variant="destructive"
+                            onSelect={() => setDeleteConfirm({ id: s.id, name: s.name })}
+                          >
+                            Delete
+                          </ContextMenuItem>
+                        </ContextMenuContent>
+                      </ContextMenu>
                     ))}
                     {p.total_sessions > MAX_VISIBLE_SESSIONS && (
                       <NavLink
@@ -253,6 +371,60 @@ export function ProjectSidebar() {
       </nav>
 
       <AddProjectModal open={addOpen} onOpenChange={setAddOpen} onAdded={() => {}} />
+
+      <Dialog open={archiveProjectConfirm !== null} onOpenChange={(open) => { if (!open) setArchiveProjectConfirm(null); }}>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Archive project?</DialogTitle>
+            <DialogDescription>
+              Removes {archiveProjectConfirm ? `"${archiveProjectConfirm.name}"` : 'this project'} from the sidebar. Files on disk are untouched. You can restore it later from the Archived Projects view.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="flex gap-2 justify-end pt-2">
+            <Button variant="outline" onClick={() => setArchiveProjectConfirm(null)}>
+              Cancel
+            </Button>
+            <Button
+              onClick={() => {
+                if (archiveProjectConfirm) void handleArchiveProject(archiveProjectConfirm.id);
+                setArchiveProjectConfirm(null);
+              }}
+            >
+              Archive
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
+
+      <Dialog open={deleteConfirm !== null} onOpenChange={(open) => { if (!open) setDeleteConfirm(null); }}>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Delete session?</DialogTitle>
+            <DialogDescription>
+              This will permanently delete {deleteConfirm ? `"${deleteConfirm.name}"` : 'this session'} and all its chats and messages. This cannot be undone.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="flex gap-2 justify-end pt-2">
+            <Button variant="outline" onClick={() => setDeleteConfirm(null)}>
+              Cancel
+            </Button>
+            <Button
+              variant="destructive"
+              onClick={() => {
+                if (deleteConfirm) {
+                  const projectId = projects.find((p) =>
+                    p.recent_sessions.some((s) => s.id === deleteConfirm.id)
+                  )?.id;
+                  if (projectId) void handleDeleteSession(deleteConfirm.id, projectId);
+                }
+                setDeleteConfirm(null);
+              }}
+            >
+              Delete
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
     </aside>
   );
 }

apps/web/src/components/RightRail.tsx

@@ -0,0 +1,264 @@
+import { useCallback, useEffect, useMemo, useState } from 'react';
+import { ChevronRight, ChevronDown, FileText, Folder, PanelRightClose, PanelRightOpen } from 'lucide-react';
+import { api } from '@/api/client';
+import type { FileEntry } from '@/api/types';
+import { inferLanguage } from '@/lib/attachments';
+import { sessionEvents } from '@/hooks/sessionEvents';
+import { FileViewerOverlay } from '@/components/FileViewerOverlay';
+import { Input } from '@/components/ui/input';
+
+interface Props {
+  projectId: string;
+}
+
+const STORAGE_KEY = 'boocode.rightrail';
+
+function basename(path: string): string {
+  if (!path) return '';
+  const parts = path.split('/');
+  return parts[parts.length - 1] ?? path;
+}
+
+function joinPath(parent: string, name: string): string {
+  if (!parent || parent === '.' || parent === '') return name;
+  return `${parent}/${name}`;
+}
+
+export function RightRail({ projectId }: Props) {
+  const [open, setOpen] = useState(() => {
+    try { return localStorage.getItem(`${STORAGE_KEY}.open`) !== 'false'; } catch { return true; }
+  });
+  const [filter, setFilter] = useState('');
+  const [expandedDirs, setExpandedDirs] = useState<Set<string>>(new Set());
+  const [cache, setCache] = useState<Map<string, FileEntry[]>>(new Map());
+  const [fullFileList, setFullFileList] = useState<string[] | null>(null);
+  const [viewerFile, setViewerFile] = useState<{ path: string; content: string } | null>(null);
+
+  useEffect(() => {
+    try { localStorage.setItem(`${STORAGE_KEY}.open`, String(open)); } catch {}
+  }, [open]);
+
+  useEffect(() => {
+    let cancelled = false;
+    api.projects.files(projectId).then((r) => {
+      if (!cancelled) setFullFileList(r.files);
+    }).catch(() => {});
+    return () => { cancelled = true; };
+  }, [projectId]);
+
+  const loadDir = useCallback(async (dirPath: string) => {
+    const apiPath = dirPath === '' ? '.' : dirPath;
+    try {
+      const result = await api.projects.listDir(projectId, apiPath);
+      setCache((prev) => { const next = new Map(prev); next.set(dirPath, result.entries); return next; });
+    } catch { /* ignore */ }
+  }, [projectId]);
+
+  useEffect(() => {
+    if (!open) return;
+    if (!cache.has('')) void loadDir('');
+  }, [open, cache, loadDir]);
+
+  function toggleDir(dirPath: string) {
+    setExpandedDirs((prev) => {
+      const next = new Set(prev);
+      if (next.has(dirPath)) {
+        next.delete(dirPath);
+      } else {
+        next.add(dirPath);
+        if (!cache.has(dirPath)) void loadDir(dirPath);
+      }
+      return next;
+    });
+  }
+
+  async function openFile(path: string) {
+    try {
+      const result = await api.projects.viewFile(projectId, path);
+      setViewerFile({ path, content: result.content });
+    } catch { /* ignore */ }
+  }
+
+  // Filter results
+  const trimmed = filter.trim().toLowerCase();
+  const filterActive = trimmed.length > 0;
+
+  interface FilterResult { path: string; name: string; }
+
+  const filterResults = useMemo<FilterResult[]>(() => {
+    if (!filterActive) return [];
+    if (fullFileList) {
+      const filenameMatches: string[] = [];
+      const pathOnly: string[] = [];
+      for (const p of fullFileList) {
+        const lp = p.toLowerCase();
+        if (!lp.includes(trimmed)) continue;
+        if (basename(p).toLowerCase().includes(trimmed)) filenameMatches.push(p);
+        else pathOnly.push(p);
+      }
+      filenameMatches.sort((a, b) => a.localeCompare(b));
+      pathOnly.sort((a, b) => a.localeCompare(b));
+      return [...filenameMatches, ...pathOnly].slice(0, 50).map((p) => ({ path: p, name: basename(p) }));
+    }
+    return [];
+  }, [filterActive, trimmed, fullFileList]);
+
+  // Listen for open_file_in_browser events
+  useEffect(() => {
+    return sessionEvents.subscribe((event) => {
+      if (event.type !== 'open_file_in_browser') return;
+      if (!open) setOpen(true);
+      void openFile(event.path);
+    });
+  }, [open, projectId]);
+
+  if (!open) {
+    return (
+      <button
+        type="button"
+        onClick={() => setOpen(true)}
+        className="shrink-0 border-l bg-sidebar p-2 hover:bg-muted"
+        aria-label="Open file browser"
+      >
+        <PanelRightOpen size={16} />
+      </button>
+    );
+  }
+
+  const rootEntries = cache.get('') ?? [];
+
+  return (
+    <>
+      <aside className="w-64 shrink-0 border-l bg-sidebar flex flex-col h-full overflow-hidden">
+        <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"
+            aria-label="Close file browser"
+          >
+            <PanelRightClose size={14} />
+          </button>
+        </div>
+        <div className="px-2 py-1.5 shrink-0">
+          <Input
+            value={filter}
+            onChange={(e) => setFilter(e.target.value)}
+            placeholder="Filter files..."
+            className="h-7 text-xs"
+          />
+        </div>
+        <div className="flex-1 overflow-y-auto px-1 py-1">
+          {filterActive ? (
+            filterResults.length > 0 ? (
+              <ul className="list-none space-y-0.5">
+                {filterResults.map((r) => (
+                  <li key={r.path}>
+                    <button
+                      type="button"
+                      className="w-full flex items-center gap-1 px-2 py-1 text-xs rounded hover:bg-muted/60 text-left"
+                      onClick={() => void openFile(r.path)}
+                    >
+                      <FileText size={12} className="text-muted-foreground shrink-0" />
+                      <span className="font-bold truncate">{r.name}</span>
+                      <span className="text-muted-foreground ml-1 truncate">{r.path}</span>
+                    </button>
+                  </li>
+                ))}
+              </ul>
+            ) : (
+              <div className="text-xs text-muted-foreground px-2 py-4 text-center">No matches</div>
+            )
+          ) : (
+            <TreeLevel
+              parentPath=""
+              entries={rootEntries}
+              cache={cache}
+              expanded={expandedDirs}
+              depth={0}
+              onToggleDir={toggleDir}
+              onSelectFile={(path) => void openFile(path)}
+            />
+          )}
+        </div>
+      </aside>
+
+      {viewerFile && (
+        <FileViewerOverlay
+          path={viewerFile.path}
+          content={viewerFile.content}
+          lang={inferLanguage(viewerFile.path)}
+          projectId={projectId}
+          onClose={() => setViewerFile(null)}
+          onNavigate={(path) => void openFile(path)}
+        />
+      )}
+    </>
+  );
+}
+
+interface TreeLevelProps {
+  parentPath: string;
+  entries: FileEntry[];
+  cache: Map<string, FileEntry[]>;
+  expanded: Set<string>;
+  depth: number;
+  onToggleDir: (dirPath: string) => void;
+  onSelectFile: (path: string) => void;
+}
+
+function TreeLevel({ parentPath, entries, cache, expanded, depth, onToggleDir, onSelectFile }: TreeLevelProps) {
+  const sorted = useMemo(() => {
+    const copy = [...entries];
+    copy.sort((a, b) => {
+      if (a.kind !== b.kind) return a.kind === 'dir' ? -1 : 1;
+      return a.name.localeCompare(b.name);
+    });
+    return copy;
+  }, [entries]);
+
+  return (
+    <ul className="list-none">
+      {sorted.map((entry) => {
+        const fullPath = joinPath(parentPath, entry.name);
+        const isExpanded = entry.kind === 'dir' && expanded.has(fullPath);
+        return (
+          <li key={fullPath}>
+            <div
+              className="flex items-center gap-1 px-1 py-0.5 text-xs cursor-default rounded hover:bg-muted/60"
+              style={{ paddingLeft: 4 + depth * 12 }}
+              onClick={() => {
+                if (entry.kind === 'dir') onToggleDir(fullPath);
+                else onSelectFile(fullPath);
+              }}
+            >
+              {entry.kind === 'dir' ? (
+                isExpanded ? <ChevronDown size={10} className="shrink-0" /> : <ChevronRight size={10} className="shrink-0" />
+              ) : (
+                <span className="w-[10px] shrink-0" />
+              )}
+              {entry.kind === 'dir' ? (
+                <Folder size={12} className="text-muted-foreground shrink-0" />
+              ) : (
+                <FileText size={12} className="text-muted-foreground shrink-0" />
+              )}
+              <span className="truncate">{entry.name}</span>
+            </div>
+            {entry.kind === 'dir' && isExpanded && cache.has(fullPath) && (
+              <TreeLevel
+                parentPath={fullPath}
+                entries={cache.get(fullPath) ?? []}
+                cache={cache}
+                expanded={expanded}
+                depth={depth + 1}
+                onToggleDir={onToggleDir}
+                onSelectFile={onSelectFile}
+              />
+            )}
+          </li>
+        );
+      })}
+    </ul>
+  );
+}

apps/web/src/components/SessionLandingPage.tsx

@@ -0,0 +1,394 @@
+import { useState } from 'react';
+import { Archive, MessageSquare, Send, ChevronDown, ChevronRight, RotateCcw, Trash2 } from 'lucide-react';
+import type { Chat } from '@/api/types';
+import { Button } from '@/components/ui/button';
+import { Textarea } from '@/components/ui/textarea';
+import { Input } from '@/components/ui/input';
+import {
+  ContextMenu,
+  ContextMenuContent,
+  ContextMenuItem,
+  ContextMenuSeparator,
+  ContextMenuTrigger,
+} from '@/components/ui/context-menu';
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+  DialogDescription,
+} from '@/components/ui/dialog';
+import { formatTokens } from '@/lib/format';
+
+interface Props {
+  sessionId: string;
+  projectId: string;
+  chats: Chat[];
+  onOpenChat: (chatId: string) => void;
+  onSend: (content: string) => void;
+  onReopenChat: (chatId: string) => Promise<void>;
+  onArchiveChat: (chatId: string) => Promise<void>;
+  onRenameChat: (chatId: string, name: string) => Promise<void>;
+  onDeleteChat: (chatId: string) => Promise<void>;
+}
+
+function relTime(iso: string): string {
+  const now = Date.now();
+  const t = Date.parse(iso);
+  if (Number.isNaN(t)) return '';
+  const sec = Math.max(0, Math.floor((now - t) / 1000));
+  if (sec < 60) return `${sec}s ago`;
+  const min = Math.floor(sec / 60);
+  if (min < 60) return `${min}m ago`;
+  const hr = Math.floor(min / 60);
+  if (hr < 24) return `${hr}h ago`;
+  const day = Math.floor(hr / 24);
+  return `${day}d ago`;
+}
+
+interface ChatRowProps {
+  chat: Chat;
+  onClick: () => void;
+  dimmed?: boolean;
+  trailing?: React.ReactNode;
+  actions?: React.ReactNode;
+  renamingId: string | null;
+  renameValue: string;
+  setRenameValue: (s: string) => void;
+  onFinishRename: () => void;
+  onCancelRename: () => void;
+  onContextStartRename: () => void;
+  onContextArchive: () => void;
+  onContextDelete: () => void;
+  showContextMenu: boolean;
+}
+
+function ChatRow({
+  chat,
+  onClick,
+  dimmed,
+  trailing,
+  actions,
+  renamingId,
+  renameValue,
+  setRenameValue,
+  onFinishRename,
+  onCancelRename,
+  onContextStartRename,
+  onContextArchive,
+  onContextDelete,
+  showContextMenu,
+}: ChatRowProps) {
+  const meta: string[] = [relTime(chat.updated_at)];
+  if (chat.message_count !== undefined && chat.message_count > 0) {
+    meta.push(`${chat.message_count} msg`);
+  }
+  const tokens = formatTokens(chat.effective_context_tokens);
+  if (tokens) meta.push(tokens);
+  const preview = chat.last_message_preview;
+  const isRenaming = renamingId === chat.id;
+
+  const inner = (
+    <button
+      type="button"
+      onClick={onClick}
+      className="w-full flex flex-col gap-0.5 px-3 py-2 hover:bg-muted/50 text-left"
+    >
+      <div className="flex items-center gap-2 min-w-0">
+        <MessageSquare className={`size-3.5 shrink-0 ${dimmed ? 'opacity-40' : 'opacity-70'}`} />
+        {isRenaming ? (
+          <input
+            autoFocus
+            value={renameValue}
+            onChange={(e) => setRenameValue(e.target.value)}
+            onBlur={() => onFinishRename()}
+            onKeyDown={(e) => {
+              if (e.key === 'Enter') onFinishRename();
+              if (e.key === 'Escape') onCancelRename();
+            }}
+            onClick={(e) => e.stopPropagation()}
+            className="bg-transparent border-b border-border text-sm outline-none flex-1 min-w-0"
+          />
+        ) : (
+          <span className={`truncate text-sm flex-1 ${dimmed ? 'text-muted-foreground' : ''}`}>
+            {chat.name ?? 'New chat'}
+          </span>
+        )}
+        {trailing && (
+          <span className="text-xs text-muted-foreground shrink-0">{trailing}</span>
+        )}
+        {actions && (
+          <div className="flex items-center gap-0.5 shrink-0">{actions}</div>
+        )}
+      </div>
+      <div className="ml-5 text-xs text-muted-foreground tabular-nums">
+        {meta.join(' · ')}
+      </div>
+      {preview && (
+        <div className="ml-5 text-xs italic text-muted-foreground truncate">
+          {preview}
+        </div>
+      )}
+    </button>
+  );
+
+  if (!showContextMenu) return inner;
+
+  return (
+    <ContextMenu>
+      <ContextMenuTrigger asChild>{inner}</ContextMenuTrigger>
+      <ContextMenuContent>
+        <ContextMenuItem onSelect={onClick}>Open</ContextMenuItem>
+        <ContextMenuItem onSelect={onContextStartRename}>Rename</ContextMenuItem>
+        <ContextMenuItem onSelect={onContextArchive}>Archive</ContextMenuItem>
+        <ContextMenuSeparator />
+        <ContextMenuItem variant="destructive" onSelect={onContextDelete}>
+          Delete
+        </ContextMenuItem>
+      </ContextMenuContent>
+    </ContextMenu>
+  );
+}
+
+export function SessionLandingPage({
+  chats,
+  onOpenChat,
+  onSend,
+  onReopenChat,
+  onArchiveChat,
+  onRenameChat,
+  onDeleteChat,
+}: Props) {
+  const [composerValue, setComposerValue] = useState('');
+  const [showArchived, setShowArchived] = useState(false);
+  const [renamingId, setRenamingId] = useState<string | null>(null);
+  const [renameValue, setRenameValue] = useState('');
+  const [archiveConfirm, setArchiveConfirm] = useState<Chat | null>(null);
+  const [deleteConfirm, setDeleteConfirm] = useState<Chat | null>(null);
+  const [deleteInput, setDeleteInput] = useState('');
+
+  const openChats = chats
+    .filter((c) => c.status === 'open')
+    .sort((a, b) => new Date(b.updated_at).getTime() - new Date(a.updated_at).getTime());
+  const archivedChats = chats
+    .filter((c) => c.status === 'archived')
+    .sort((a, b) => new Date(b.updated_at).getTime() - new Date(a.updated_at).getTime());
+
+  function handleSend() {
+    const text = composerValue.trim();
+    if (!text) return;
+    onSend(text);
+    setComposerValue('');
+  }
+
+  function startRename(chat: Chat) {
+    setRenamingId(chat.id);
+    setRenameValue(chat.name ?? '');
+  }
+
+  async function finishRename() {
+    if (renamingId && renameValue.trim()) {
+      await onRenameChat(renamingId, renameValue.trim());
+    }
+    setRenamingId(null);
+  }
+
+  const deleteExpected = deleteConfirm?.name ?? '';
+  const deleteEnabled = deleteConfirm !== null && deleteInput === deleteExpected && deleteExpected.length > 0;
+
+  // TODO: Landing page chat counts are a snapshot at mount. New messages in
+  // visible chats won't update the per-row stats until next mount/navigation.
+  return (
+    <div className="flex flex-col h-full min-h-0">
+      <div className="flex-1 overflow-y-auto px-6 py-4 space-y-6">
+        {openChats.length > 0 && (
+          <div>
+            <h3 className="text-xs font-medium text-muted-foreground mb-2">Open chats</h3>
+            <ul className="divide-y rounded-md border">
+              {openChats.map((chat) => (
+                <li key={chat.id}>
+                  <ChatRow
+                    chat={chat}
+                    onClick={() => onOpenChat(chat.id)}
+                    renamingId={renamingId}
+                    renameValue={renameValue}
+                    setRenameValue={setRenameValue}
+                    onFinishRename={() => void finishRename()}
+                    onCancelRename={() => setRenamingId(null)}
+                    onContextStartRename={() => startRename(chat)}
+                    onContextArchive={() => setArchiveConfirm(chat)}
+                    onContextDelete={() => { setDeleteConfirm(chat); setDeleteInput(''); }}
+                    showContextMenu
+                    actions={
+                      <>
+                        <Button
+                          variant="ghost"
+                          size="icon-sm"
+                          aria-label="Archive chat"
+                          title="Archive chat"
+                          onClick={(e) => {
+                            e.stopPropagation();
+                            setArchiveConfirm(chat);
+                          }}
+                        >
+                          <Archive size={14} />
+                        </Button>
+                        <Button
+                          variant="ghost"
+                          size="icon-sm"
+                          aria-label="Delete chat"
+                          title="Delete chat"
+                          className="text-destructive hover:text-destructive"
+                          onClick={(e) => {
+                            e.stopPropagation();
+                            setDeleteConfirm(chat);
+                            setDeleteInput('');
+                          }}
+                        >
+                          <Trash2 size={14} />
+                        </Button>
+                      </>
+                    }
+                  />
+                </li>
+              ))}
+            </ul>
+          </div>
+        )}
+
+        {archivedChats.length > 0 && (
+          <div>
+            <button
+              type="button"
+              onClick={() => setShowArchived(!showArchived)}
+              className="flex items-center gap-1 text-xs font-medium text-muted-foreground mb-2 hover:text-foreground"
+            >
+              {showArchived ? <ChevronDown size={12} /> : <ChevronRight size={12} />}
+              Archived chats ({archivedChats.length})
+            </button>
+            {showArchived && (
+              <ul className="divide-y rounded-md border">
+                {archivedChats.map((chat) => (
+                  <li key={chat.id}>
+                    <ChatRow
+                      chat={chat}
+                      onClick={() => void onReopenChat(chat.id)}
+                      dimmed
+                      trailing={<><RotateCcw size={10} className="inline mr-1" />Restore</>}
+                      renamingId={null}
+                      renameValue=""
+                      setRenameValue={() => {}}
+                      onFinishRename={() => {}}
+                      onCancelRename={() => {}}
+                      onContextStartRename={() => {}}
+                      onContextArchive={() => {}}
+                      onContextDelete={() => {}}
+                      showContextMenu={false}
+                    />
+                  </li>
+                ))}
+              </ul>
+            )}
+          </div>
+        )}
+
+        {openChats.length === 0 && archivedChats.length === 0 && (
+          <div className="text-sm text-muted-foreground py-8 text-center">
+            No chats yet. Type below to start a conversation.
+          </div>
+        )}
+      </div>
+
+      <div className="border-t px-4 py-3 flex items-end gap-2 shrink-0">
+        <Textarea
+          value={composerValue}
+          onChange={(e) => setComposerValue(e.target.value)}
+          onKeyDown={(e) => {
+            if (e.key === 'Enter' && (e.metaKey || e.ctrlKey)) {
+              e.preventDefault();
+              handleSend();
+              return;
+            }
+            if (e.key === 'Enter' && !e.shiftKey) {
+              e.preventDefault();
+              handleSend();
+            }
+          }}
+          placeholder="Start a new chat..."
+          rows={2}
+          className="resize-none min-h-[52px] max-h-[160px]"
+        />
+        <Button
+          onClick={handleSend}
+          disabled={!composerValue.trim()}
+          size="icon-lg"
+          aria-label="Send"
+        >
+          <Send />
+        </Button>
+      </div>
+
+      <Dialog open={archiveConfirm !== null} onOpenChange={(open) => { if (!open) setArchiveConfirm(null); }}>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Archive chat?</DialogTitle>
+            <DialogDescription>
+              Moves {archiveConfirm ? `"${archiveConfirm.name ?? 'New chat'}"` : 'this chat'} to the Archived chats section. You can restore it any time.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="flex gap-2 justify-end pt-2">
+            <Button variant="outline" onClick={() => setArchiveConfirm(null)}>
+              Cancel
+            </Button>
+            <Button
+              onClick={() => {
+                if (archiveConfirm) void onArchiveChat(archiveConfirm.id);
+                setArchiveConfirm(null);
+              }}
+            >
+              Archive
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
+
+      <Dialog open={deleteConfirm !== null} onOpenChange={(open) => { if (!open) { setDeleteConfirm(null); setDeleteInput(''); } }}>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Delete chat?</DialogTitle>
+            <DialogDescription>
+              Type the chat name to confirm:
+              {' '}
+              <span className="font-mono font-medium text-foreground">{deleteExpected || '(unnamed — cannot type-confirm)'}</span>
+            </DialogDescription>
+          </DialogHeader>
+          <Input
+            value={deleteInput}
+            onChange={(e) => setDeleteInput(e.target.value)}
+            placeholder={deleteExpected}
+            disabled={!deleteExpected}
+          />
+          <div className="text-xs text-muted-foreground">
+            This will permanently delete this chat and all its messages. This cannot be undone.
+          </div>
+          <div className="flex gap-2 justify-end pt-2">
+            <Button variant="outline" onClick={() => { setDeleteConfirm(null); setDeleteInput(''); }}>
+              Cancel
+            </Button>
+            <Button
+              variant="destructive"
+              disabled={!deleteEnabled}
+              onClick={() => {
+                if (deleteConfirm && deleteEnabled) void onDeleteChat(deleteConfirm.id);
+                setDeleteConfirm(null);
+                setDeleteInput('');
+              }}
+            >
+              Delete
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
+    </div>
+  );
+}

apps/web/src/components/Workspace.tsx

@@ -1,13 +1,17 @@
-import { useCallback, useEffect, useRef, useState } from 'react';
-import type { DragEvent } from 'react';
-import { Plus } from 'lucide-react';
-import { usePanes } from '@/hooks/usePanes';
-import { sessionEvents } from '@/hooks/sessionEvents';
-import type { FileBrowserPaneState, Pane, PaneKind } from '@/api/types';
-import { PaneTab } from '@/components/PaneTab';
-import { PaneShell } from '@/components/panes/PaneShell';
+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 { ChatPane } from '@/components/panes/ChatPane';
-import { FileBrowserPane } from '@/components/panes/FileBrowserPane';
+import { ChatTabBar } from '@/components/ChatTabBar';
+import { SessionLandingPage } from '@/components/SessionLandingPage';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
 import { cn } from '@/lib/utils';
 
 interface Props {
@@ -15,325 +19,154 @@ interface Props {
   projectId: string;
 }
 
-const MAX_PANES = 5;
-
-function PaneSkeleton() {
-  return (
-    <div className="flex flex-col h-full">
-      <div className="flex items-center border-b border-border bg-muted/20 h-8" />
-      <div className="flex-1 flex items-center justify-center text-xs text-muted-foreground">
-        Loading panes...
-      </div>
-    </div>
-  );
-}
-
-function PaneError({
-  message,
-  onRetry,
-}: {
-  message: string;
-  onRetry: () => void | Promise<void>;
-}) {
-  return (
-    <div className="flex flex-col h-full items-center justify-center gap-2 text-sm">
-      <span className="text-destructive">{message}</span>
-      <button
-        type="button"
-        onClick={() => void onRetry()}
-        className="text-xs underline text-muted-foreground hover:text-foreground"
-      >
-        Retry
-      </button>
-    </div>
-  );
-}
-
 export function Workspace({ sessionId, projectId }: Props) {
-  const { panes, loading, error, create, update, remove, refresh } =
-    usePanes(sessionId);
-  const [activeId, setActiveId] = useState<string | null>(null);
-  const draggingIdRef = useRef<string | null>(null);
+  const {
+    panes,
+    activePaneIdx,
+    setActivePaneIdx,
+    activePaneIdxRef,
+    openChatInPane,
+    switchTab,
+    removeTab,
+    closeOtherTabs,
+    closeTabsToRight,
+    closeAllTabs,
+    showLandingPage,
+    addSplitPane,
+    removePane,
+    removeChatFromPanes,
+    initializeFirstChatIfEmpty,
+    handlePaneDragStart,
+    handlePaneDragOver,
+    handlePaneDragLeave,
+    handlePaneDrop,
+    handlePaneDragEnd,
+    dragOverIdx,
+    draggingIdxRef,
+  } = useWorkspacePanes(sessionId);
 
-  // Keep latest panes in a ref so the event-bus subscription doesn't need
-  // to re-subscribe whenever the list changes (which would race with rapid
-  // updates).
-  const panesRef = useRef<Pane[] | null>(null);
-  panesRef.current = panes;
-
-  // Default active: first pane (and reset if the active one disappears)
-  useEffect(() => {
-    if (!panes || panes.length === 0) {
-      if (activeId !== null) setActiveId(null);
-      return;
-    }
-    if (!panes.some((p) => p.id === activeId)) {
-      setActiveId(panes[0]!.id);
-    }
-  }, [panes, activeId]);
-
-  // Tracks an in-flight create() call so rapid open_file_in_browser events
-  // don't race to each spawn a new file_browser pane. While a create is in
-  // progress the subsequent events wait for it and update the same pane.
-  const creatingRef = useRef<{ id: string; promise: Promise<string> } | null>(
-    null
+  // 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],
   );
 
-  // Subscribe to open_file_in_browser events: focus an existing file_browser
-  // pane (updating its open_file) or spawn one if room is available.
-  useEffect(() => {
-    return sessionEvents.subscribe((event) => {
-      if (event.type !== 'open_file_in_browser') return;
-      void (async () => {
-        // If a create is already in flight, wait for it to finish then update
-        // the newly-created pane rather than spawning a second one.
-        if (creatingRef.current) {
-          const { id: pendingId, promise } = creatingRef.current;
-          const resolvedId = await promise;
-          const targetId = resolvedId || pendingId;
-          const current = panesRef.current;
-          const fb = current?.find((p) => p.id === targetId);
-          const nextState: FileBrowserPaneState = {
-            ...(fb?.kind === 'file_browser' ? fb.state : {}),
-            open_file: event.path,
-          };
-          await update(targetId, { state: nextState });
-          setActiveId(targetId);
-          return;
-        }
+  const {
+    chats,
+    createChat,
+    archiveChat,
+    unarchiveChat,
+    deleteChat,
+    renameChat,
+    handleLandingSend,
+  } = useSessionChats(sessionId, {
+    removeChatFromPanes,
+    openChatInPane,
+    openChatInActivePane,
+    initializeFirstChatIfEmpty,
+  });
 
-        const current = panesRef.current;
-        if (!current) return;
-        const fb = current.find(
-          (p): p is Pane & { kind: 'file_browser' } =>
-            p.kind === 'file_browser'
-        );
-        if (fb) {
-          const nextState: FileBrowserPaneState = {
-            ...fb.state,
-            open_file: event.path,
-          };
-          await update(fb.id, { state: nextState });
-          setActiveId(fb.id);
-        } else if (current.length < MAX_PANES) {
-          // Reserve the slot immediately so concurrent events see the flag.
-          const createPromise = (async (): Promise<string> => {
-            const newPane = await create({ kind: 'file_browser' });
-            return newPane.id;
-          })();
-          // Use a stable object; id is filled in once resolved.
-          const entry: { id: string; promise: Promise<string> } = {
-            id: '',
-            promise: createPromise,
-          };
-          creatingRef.current = entry;
-          try {
-            const newId = await createPromise;
-            entry.id = newId;
-            const nextState: FileBrowserPaneState = {
-              open_file: event.path,
-              filter: '',
-              expanded_dirs: [],
-            };
-            await update(newId, { state: nextState });
-            setActiveId(newId);
-          } finally {
-            if (creatingRef.current === entry) {
-              creatingRef.current = null;
-            }
-          }
-        }
-      })();
-    });
-  }, [create, update]);
-
-  const handleClose = useCallback(
-    async (id: string) => {
-      try {
-        await remove(id);
-      } catch {
-        /* error surfaced via hook state */
-      }
-    },
-    [remove]
-  );
-
-  const handleSplit = useCallback(
-    async (afterIdx: number, kind: PaneKind) => {
-      const current = panesRef.current;
-      if (!current || current.length >= MAX_PANES) return;
-      try {
-        const created = await create({ kind, position: afterIdx + 1 });
-        setActiveId(created.id);
-      } catch {
-        /* error surfaced via hook state */
-      }
-    },
-    [create]
-  );
-
-  const handleCloseOthers = useCallback(
-    async (id: string) => {
-      const current = panesRef.current;
-      if (!current) return;
-      const targets = current.filter((p) => p.id !== id).map((p) => p.id);
-      for (const targetId of targets) {
-        try {
-          await remove(targetId);
-        } catch {
-          // Stop on first failure to avoid cascading errors.
-          return;
-        }
-      }
-    },
-    [remove]
-  );
-
-  const handleCloseToRight = useCallback(
-    async (idx: number) => {
-      const current = panesRef.current;
-      if (!current) return;
-      const targets = current.slice(idx + 1).map((p) => p.id);
-      for (const targetId of targets) {
-        try {
-          await remove(targetId);
-        } catch {
-          return;
-        }
-      }
-    },
-    [remove]
-  );
-
-  const handleCloseAll = useCallback(async () => {
-    const current = panesRef.current;
-    if (!current) return;
-    const targets = current.map((p) => p.id);
-    for (const targetId of targets) {
-      try {
-        await remove(targetId);
-      } catch {
-        return;
-      }
-    }
-  }, [remove]);
-
-  const handleAdd = useCallback(async () => {
-    const current = panesRef.current;
-    if (current && current.length >= MAX_PANES) return;
-    try {
-      const created = await create({ kind: 'chat' });
-      setActiveId(created.id);
-    } catch {
-      /* error surfaced via hook state */
-    }
-  }, [create]);
-
-  const handleDragStart = useCallback(
-    (id: string) => (e: DragEvent<HTMLDivElement>) => {
-      draggingIdRef.current = id;
-      e.dataTransfer.effectAllowed = 'move';
-      e.dataTransfer.setData('text/plain', id);
-    },
-    []
-  );
-
-  const handleDragOver = useCallback((e: DragEvent<HTMLDivElement>) => {
-    e.preventDefault();
-    e.dataTransfer.dropEffect = 'move';
-  }, []);
-
-  const handleDrop = useCallback(
-    (targetIdx: number) => async (e: DragEvent<HTMLDivElement>) => {
-      e.preventDefault();
-      const draggedId =
-        draggingIdRef.current || e.dataTransfer.getData('text/plain');
-      draggingIdRef.current = null;
-      if (!draggedId) return;
-      const current = panesRef.current;
-      if (!current) return;
-      const draggedIdx = current.findIndex((p) => p.id === draggedId);
-      if (draggedIdx < 0 || draggedIdx === targetIdx) return;
-      try {
-        await update(draggedId, { position: targetIdx });
-      } catch {
-        /* error surfaced via hook state */
-      }
-    },
-    [update]
-  );
-
-  if (loading && !panes) return <PaneSkeleton />;
-  if (error && !panes) return <PaneError message={error} onRetry={refresh} />;
-  if (!panes) return <PaneSkeleton />;
+  function chatsForPane(pane: WorkspacePane): Chat[] {
+    return pane.chatIds
+      .map((id) => chats.find((c) => c.id === id))
+      .filter((c): c is Chat => c !== undefined);
+  }
 
   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>
+
       <div
-        className="flex items-center border-b border-border bg-muted/20"
-        role="tablist"
+        className="flex-1 grid min-h-0"
+        style={{
+          gridTemplateColumns: `repeat(${panes.length}, minmax(0, 1fr))`,
+        }}
       >
         {panes.map((pane, idx) => (
-          <PaneTab
+          <div
             key={pane.id}
-            pane={pane}
-            isActive={pane.id === activeId}
-            onClick={() => setActiveId(pane.id)}
-            onClose={() => void handleClose(pane.id)}
-            onSplit={(kind) => void handleSplit(idx, kind)}
-            onCloseOthers={() => void handleCloseOthers(pane.id)}
-            onCloseToRight={() => void handleCloseToRight(idx)}
-            onCloseAll={() => void handleCloseAll()}
-            onDragStart={handleDragStart(pane.id)}
-            onDragOver={handleDragOver}
-            onDrop={handleDrop(idx)}
-          />
-        ))}
-        <button
-          type="button"
-          onClick={() => void handleAdd()}
-          disabled={panes.length >= MAX_PANES}
-          className={cn(
-            'p-1.5 ml-1 rounded text-muted-foreground hover:bg-muted hover:text-foreground',
-            panes.length >= MAX_PANES && 'opacity-40 cursor-not-allowed hover:bg-transparent'
-          )}
-          aria-label="Add pane"
-        >
-          <Plus size={14} />
-        </button>
-      </div>
-      {panes.length === 0 ? (
-        <div className="flex-1 flex items-center justify-center text-xs text-muted-foreground">
-          No panes. Click + to add one.
-        </div>
-      ) : (
-        <div
-          className="flex-1 grid min-h-0"
-          style={{
-            gridTemplateColumns: `repeat(${panes.length}, minmax(0, 1fr))`,
-          }}
-        >
-          {panes.map((pane) => (
-            <PaneShell
-              key={pane.id}
-              pane={pane}
-              onClose={() => void handleClose(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 &&
+                '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}
+          >
+            <div
+              draggable={panes.length > 1}
+              onDragStart={panes.length > 1 ? handlePaneDragStart(idx) : undefined}
+              onDragEnd={panes.length > 1 ? handlePaneDragEnd : undefined}
             >
-              {pane.kind === 'chat' ? (
-                <ChatPane sessionId={sessionId} />
+              <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} />
               ) : (
-                <FileBrowserPane
-                  pane={pane}
+                <SessionLandingPage
+                  sessionId={sessionId}
                   projectId={projectId}
-                  onStateChange={(state) =>
-                    void update(pane.id, { state })
-                  }
+                  chats={chats}
+                  onOpenChat={(chatId) => openChatInPane(idx, chatId)}
+                  onSend={(content) => void handleLandingSend(idx, content)}
+                  onReopenChat={async (chatId) => {
+                    await unarchiveChat(chatId);
+                    openChatInPane(idx, chatId);
+                  }}
+                  onArchiveChat={archiveChat}
+                  onRenameChat={renameChat}
+                  onDeleteChat={deleteChat}
                 />
               )}
-            </PaneShell>
-          ))}
-        </div>
-      )}
+            </div>
+          </div>
+        ))}
+      </div>
     </div>
   );
 }

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

@@ -1,19 +1,30 @@
-import { useEffect, useRef } from 'react';
+import { useCallback, useEffect, useRef, useState } from 'react';
+import { ChevronDown, Square, X } from 'lucide-react';
 import { toast } from 'sonner';
 import { api } from '@/api/client';
 import { useSessionStream } from '@/hooks/useSessionStream';
 import { MessageList } from '@/components/MessageList';
 import { ChatInput } from '@/components/ChatInput';
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu';
 
 interface Props {
   sessionId: string;
+  chatId: string;
+  projectId: string;
+  sessionChats?: import('@/api/types').Chat[];
 }
 
-export function ChatPane({ sessionId }: Props) {
+export function ChatPane({ sessionId, chatId, projectId, sessionChats }: Props) {
   const stream = useSessionStream(sessionId);
   const lastErrorRef = useRef<string | null>(null);
+  const [queue, setQueue] = useState<string[]>([]);
+  const processingRef = useRef(false);
 
-  // Surface stream errors via toast — matches Session.tsx behavior.
   useEffect(() => {
     if (stream.error && stream.error !== lastErrorRef.current) {
       lastErrorRef.current = stream.error;
@@ -24,16 +35,134 @@ export function ChatPane({ sessionId }: Props) {
     }
   }, [stream.error]);
 
-  async function handleSend(content: string) {
-    await api.messages.send(sessionId, content);
+  const chatMessages = stream.messages.filter((m) => m.chat_id === chatId);
+  const streaming = chatMessages.some((m) => m.status === 'streaming');
+
+  // Auto-send next queued message when streaming completes
+  useEffect(() => {
+    if (streaming || queue.length === 0 || processingRef.current) return;
+    processingRef.current = true;
+    const next = queue[0]!;
+    setQueue((prev) => prev.slice(1));
+    api.messages.send(chatId, next)
+      .catch((err) => toast.error(err instanceof Error ? err.message : 'queue send failed'))
+      .finally(() => { processingRef.current = false; });
+  }, [streaming, queue, chatId]);
+
+  const handleSend = useCallback(async (content: string) => {
+    const trimmed = content.trim();
+    if (!trimmed) return;
+    if (trimmed === '/compact') {
+      try {
+        await api.chats.compact(chatId);
+      } catch (err) {
+        toast.error(err instanceof Error ? err.message : 'compact failed');
+      }
+      return;
+    }
+    if (streaming) {
+      setQueue((prev) => [...prev, trimmed]);
+      return;
+    }
+    await api.messages.send(chatId, trimmed);
+  }, [chatId, streaming]);
+
+  async function handleStop() {
+    try {
+      await api.chats.stop(chatId);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'stop failed');
+    }
   }
 
-  const streaming = stream.messages.some((m) => m.status === 'streaming');
+  const handleForceSend = useCallback(async (content: string) => {
+    const trimmed = content.trim();
+    if (!trimmed) return;
+    try {
+      await api.chats.forceSend(chatId, trimmed);
+      setQueue([]);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'force send failed');
+    }
+  }, [chatId]);
+
+  function removeQueued(idx: number) {
+    setQueue((prev) => prev.filter((_, i) => i !== idx));
+  }
+
+  async function forceSendQueued(idx: number) {
+    const msg = queue[idx];
+    if (!msg) return;
+    setQueue((prev) => prev.filter((_, i) => i !== idx));
+    try {
+      await api.chats.forceSend(chatId, msg);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'force send failed');
+    }
+  }
 
   return (
     <div className="flex flex-col h-full min-h-0">
-      <MessageList messages={stream.messages} sessionId={sessionId} />
-      <ChatInput disabled={streaming} onSend={handleSend} />
+      <MessageList messages={chatMessages} sessionChats={sessionChats} />
+
+      {/* Queued messages */}
+      {queue.length > 0 && (
+        <div className="border-t">
+          <div className="max-w-[1000px] mx-auto w-full px-4 py-1 space-y-1">
+          {queue.map((msg, i) => (
+            <div key={i} className="flex items-center gap-2 text-xs text-muted-foreground bg-muted/30 rounded px-2 py-1">
+              <span className="font-medium shrink-0">Queued:</span>
+              <span className="truncate flex-1">{msg}</span>
+              <DropdownMenu>
+                <DropdownMenuTrigger asChild>
+                  <button
+                    type="button"
+                    className="p-0.5 hover:bg-muted rounded shrink-0"
+                    aria-label="Queued message options"
+                  >
+                    <ChevronDown size={12} />
+                  </button>
+                </DropdownMenuTrigger>
+                <DropdownMenuContent align="end">
+                  <DropdownMenuItem onSelect={() => { /* default: queued, nothing to do */ }}>
+                    Send when done
+                  </DropdownMenuItem>
+                  <DropdownMenuItem onSelect={() => void forceSendQueued(i)}>
+                    Force send now
+                  </DropdownMenuItem>
+                </DropdownMenuContent>
+              </DropdownMenu>
+              <button
+                type="button"
+                onClick={() => removeQueued(i)}
+                className="p-0.5 hover:bg-muted rounded shrink-0"
+                aria-label="Cancel queued message"
+              >
+                <X size={12} />
+              </button>
+            </div>
+          ))}
+          </div>
+        </div>
+      )}
+
+      {/* Stop button when streaming */}
+      {streaming && (
+        <div className="border-t py-1">
+          <div className="max-w-[1000px] mx-auto w-full flex justify-center">
+          <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"
+          >
+            <Square size={10} className="fill-current" />
+            Stop generating
+          </button>
+          </div>
+        </div>
+      )}
+
+      <ChatInput disabled={false} projectId={projectId} onSend={handleSend} onForceSend={streaming ? handleForceSend : undefined} />
     </div>
   );
 }

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

@@ -1,637 +0,0 @@
-import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
-import type { KeyboardEvent } from 'react';
-import { ChevronRight, ChevronDown, FileText, Folder, X } from 'lucide-react';
-import { api, ApiError } from '@/api/client';
-import type {
-  FileBrowserPaneState,
-  FileEntry,
-  Pane,
-  ViewFileResult,
-} from '@/api/types';
-import { CodeBlock } from '@/components/CodeBlock';
-import { cn } from '@/lib/utils';
-
-interface Props {
-  pane: Pane & { kind: 'file_browser' };
-  projectId: string;
-  onStateChange: (state: FileBrowserPaneState) => void;
-}
-
-const LANG_BY_EXT: Record<string, string> = {
-  ts: 'typescript',
-  tsx: 'tsx',
-  js: 'javascript',
-  jsx: 'jsx',
-  mjs: 'javascript',
-  cjs: 'javascript',
-  py: 'python',
-  go: 'go',
-  rs: 'rust',
-  rb: 'ruby',
-  java: 'java',
-  c: 'c',
-  h: 'c',
-  cpp: 'cpp',
-  hpp: 'cpp',
-  cs: 'csharp',
-  php: 'php',
-  sh: 'bash',
-  bash: 'bash',
-  zsh: 'bash',
-  yaml: 'yaml',
-  yml: 'yaml',
-  json: 'json',
-  toml: 'toml',
-  md: 'markdown',
-  markdown: 'markdown',
-  sql: 'sql',
-  dockerfile: 'dockerfile',
-  html: 'html',
-  htm: 'html',
-  css: 'css',
-  scss: 'scss',
-};
-
-function deriveLang(filePath: string): string | undefined {
-  // basename
-  const base = filePath.split('/').pop() ?? filePath;
-  if (base.toLowerCase() === 'dockerfile') return 'dockerfile';
-  const dot = base.lastIndexOf('.');
-  if (dot < 0 || dot === base.length - 1) return undefined;
-  const ext = base.slice(dot + 1).toLowerCase();
-  return LANG_BY_EXT[ext];
-}
-
-function basename(path: string): string {
-  if (!path) return '';
-  const parts = path.split('/');
-  return parts[parts.length - 1] ?? path;
-}
-
-function joinPath(parent: string, name: string): string {
-  if (!parent || parent === '.' || parent === '') return name;
-  return `${parent}/${name}`;
-}
-
-interface TreeNodeProps {
-  parentPath: string; // '' for root children
-  entries: FileEntry[];
-  cache: Map<string, FileEntry[]>;
-  expanded: Set<string>;
-  openFile: string | null;
-  highlightedPath: string | null;
-  depth: number;
-  onToggleDir: (dirPath: string) => void;
-  onSelectFile: (path: string) => void;
-  setHighlightedPath: (p: string) => void;
-}
-
-function TreeNode({
-  parentPath,
-  entries,
-  cache,
-  expanded,
-  openFile,
-  highlightedPath,
-  depth,
-  onToggleDir,
-  onSelectFile,
-  setHighlightedPath,
-}: TreeNodeProps) {
-  // Sort: dirs first, then files; alphabetical within each.
-  const sorted = useMemo(() => {
-    const copy = [...entries];
-    copy.sort((a, b) => {
-      if (a.kind !== b.kind) return a.kind === 'dir' ? -1 : 1;
-      return a.name.localeCompare(b.name);
-    });
-    return copy;
-  }, [entries]);
-
-  return (
-    <ul className="list-none">
-      {sorted.map((entry) => {
-        const fullPath = joinPath(parentPath, entry.name);
-        const isExpanded = entry.kind === 'dir' && expanded.has(fullPath);
-        const isActive = entry.kind === 'file' && openFile === fullPath;
-        const isHighlight = highlightedPath === fullPath;
-        return (
-          <li key={fullPath}>
-            <div
-              data-path={fullPath}
-              data-kind={entry.kind}
-              className={cn(
-                'flex items-center gap-1 px-1 py-0.5 text-xs cursor-default rounded hover:bg-muted/60',
-                isActive && 'bg-muted',
-                isHighlight && 'ring-1 ring-ring/40'
-              )}
-              style={{ paddingLeft: 4 + depth * 12 }}
-              onClick={() => {
-                setHighlightedPath(fullPath);
-                if (entry.kind === 'dir') {
-                  onToggleDir(fullPath);
-                } else {
-                  onSelectFile(fullPath);
-                }
-              }}
-            >
-              {entry.kind === 'dir' ? (
-                <button
-                  type="button"
-                  aria-label={isExpanded ? 'Collapse' : 'Expand'}
-                  className="p-0.5 hover:bg-muted rounded shrink-0"
-                  onClick={(e) => {
-                    e.stopPropagation();
-                    setHighlightedPath(fullPath);
-                    onToggleDir(fullPath);
-                  }}
-                >
-                  {isExpanded ? (
-                    <ChevronDown size={10} />
-                  ) : (
-                    <ChevronRight size={10} />
-                  )}
-                </button>
-              ) : (
-                <span className="w-[16px] shrink-0" />
-              )}
-              {entry.kind === 'dir' ? (
-                <Folder size={12} className="text-muted-foreground shrink-0" />
-              ) : (
-                <FileText size={12} className="text-muted-foreground shrink-0" />
-              )}
-              <span className="truncate">{entry.name}</span>
-            </div>
-            {entry.kind === 'dir' && isExpanded && cache.has(fullPath) && (
-              <TreeNode
-                parentPath={fullPath}
-                entries={cache.get(fullPath) ?? []}
-                cache={cache}
-                expanded={expanded}
-                openFile={openFile}
-                highlightedPath={highlightedPath}
-                depth={depth + 1}
-                onToggleDir={onToggleDir}
-                onSelectFile={onSelectFile}
-                setHighlightedPath={setHighlightedPath}
-              />
-            )}
-          </li>
-        );
-      })}
-    </ul>
-  );
-}
-
-export function FileBrowserPane({ pane, projectId, onStateChange }: Props) {
-  const openFile = pane.state.open_file ?? null;
-  const filter = pane.state.filter ?? '';
-  const expandedDirs = useMemo(
-    () => pane.state.expanded_dirs ?? [],
-    [pane.state.expanded_dirs]
-  );
-
-  // Local filter (debounced 100ms before pushing to onStateChange)
-  const [filterDraft, setFilterDraft] = useState(filter);
-  const filterDebounceRef = useRef<ReturnType<typeof setTimeout> | null>(null);
-
-  // Track previous external filter so we can sync local draft when the
-  // canonical state changes from outside (e.g. server snapshot, other tab).
-  const lastExternalFilter = useRef(filter);
-  useEffect(() => {
-    if (filter !== lastExternalFilter.current) {
-      lastExternalFilter.current = filter;
-      setFilterDraft(filter);
-    }
-  }, [filter]);
-
-  function onFilterInput(value: string) {
-    setFilterDraft(value);
-    if (filterDebounceRef.current !== null) {
-      clearTimeout(filterDebounceRef.current);
-    }
-    filterDebounceRef.current = setTimeout(() => {
-      filterDebounceRef.current = null;
-      lastExternalFilter.current = value;
-      onStateChange({
-        ...pane.state,
-        filter: value,
-        open_file: openFile,
-        expanded_dirs: expandedDirs,
-      });
-    }, 100);
-  }
-
-  useEffect(() => {
-    return () => {
-      if (filterDebounceRef.current !== null) {
-        clearTimeout(filterDebounceRef.current);
-      }
-    };
-  }, []);
-
-  // Directory cache: dirPath -> entries
-  const [cache, setCache] = useState<Map<string, FileEntry[]>>(new Map());
-  const [loadingDirs, setLoadingDirs] = useState<Set<string>>(new Set());
-  const [dirErrors, setDirErrors] = useState<Map<string, string>>(new Map());
-
-  const loadDir = useCallback(
-    async (dirPath: string) => {
-      // dirPath '' is root; server expects '.'
-      const apiPath = dirPath === '' ? '.' : dirPath;
-      setLoadingDirs((prev) => {
-        if (prev.has(dirPath)) return prev;
-        const next = new Set(prev);
-        next.add(dirPath);
-        return next;
-      });
-      try {
-        const result = await api.projects.listDir(projectId, apiPath);
-        setCache((prev) => {
-          const next = new Map(prev);
-          next.set(dirPath, result.entries);
-          return next;
-        });
-        setDirErrors((prev) => {
-          if (!prev.has(dirPath)) return prev;
-          const next = new Map(prev);
-          next.delete(dirPath);
-          return next;
-        });
-      } catch (err) {
-        const msg = err instanceof Error ? err.message : 'failed to list directory';
-        setDirErrors((prev) => {
-          const next = new Map(prev);
-          next.set(dirPath, msg);
-          return next;
-        });
-      } finally {
-        setLoadingDirs((prev) => {
-          if (!prev.has(dirPath)) return prev;
-          const next = new Set(prev);
-          next.delete(dirPath);
-          return next;
-        });
-      }
-    },
-    [projectId]
-  );
-
-  // Load root on mount + any expanded dirs from server state.
-  useEffect(() => {
-    if (!cache.has('')) {
-      void loadDir('');
-    }
-    for (const dir of expandedDirs) {
-      if (!cache.has(dir)) {
-        void loadDir(dir);
-      }
-    }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [projectId]);
-
-  // When expandedDirs grows (e.g. user expands), ensure new dir is loaded.
-  useEffect(() => {
-    for (const dir of expandedDirs) {
-      if (!cache.has(dir) && !loadingDirs.has(dir)) {
-        void loadDir(dir);
-      }
-    }
-  }, [expandedDirs, cache, loadingDirs, loadDir]);
-
-  const expandedSet = useMemo(() => new Set(expandedDirs), [expandedDirs]);
-
-  function toggleDir(dirPath: string) {
-    let nextDirs: string[];
-    if (expandedSet.has(dirPath)) {
-      nextDirs = expandedDirs.filter((d) => d !== dirPath);
-    } else {
-      nextDirs = [...expandedDirs, dirPath];
-    }
-    onStateChange({
-      ...pane.state,
-      open_file: openFile,
-      filter: filterDraft,
-      expanded_dirs: nextDirs,
-    });
-  }
-
-  function selectFile(path: string) {
-    onStateChange({
-      ...pane.state,
-      open_file: path,
-      filter: filterDraft,
-      expanded_dirs: expandedDirs,
-    });
-  }
-
-  function closeOpenFile() {
-    onStateChange({
-      ...pane.state,
-      open_file: null,
-      filter: filterDraft,
-      expanded_dirs: expandedDirs,
-    });
-  }
-
-  // Build a flat list of all entries reachable through the loaded cache,
-  // for filter results and keyboard navigation.
-  interface FlatEntry {
-    path: string;
-    name: string;
-    kind: 'file' | 'dir';
-  }
-
-  const flattenedVisible = useMemo<FlatEntry[]>(() => {
-    const result: FlatEntry[] = [];
-    function walk(dirPath: string) {
-      const entries = cache.get(dirPath);
-      if (!entries) return;
-      const sorted = [...entries].sort((a, b) => {
-        if (a.kind !== b.kind) return a.kind === 'dir' ? -1 : 1;
-        return a.name.localeCompare(b.name);
-      });
-      for (const e of sorted) {
-        const full = joinPath(dirPath, e.name);
-        result.push({ path: full, name: e.name, kind: e.kind });
-        if (e.kind === 'dir' && expandedSet.has(full)) {
-          walk(full);
-        }
-      }
-    }
-    walk('');
-    return result;
-  }, [cache, expandedSet]);
-
-  const flattenedAll = useMemo<FlatEntry[]>(() => {
-    const result: FlatEntry[] = [];
-    function walk(dirPath: string) {
-      const entries = cache.get(dirPath);
-      if (!entries) return;
-      for (const e of entries) {
-        const full = joinPath(dirPath, e.name);
-        result.push({ path: full, name: e.name, kind: e.kind });
-        if (e.kind === 'dir') walk(full);
-      }
-    }
-    walk('');
-    return result;
-  }, [cache]);
-
-  const trimmedFilter = filterDraft.trim();
-  const filterActive = trimmedFilter.length > 0;
-  const filterResults = useMemo<FlatEntry[]>(() => {
-    if (!filterActive) return [];
-    const needle = trimmedFilter.toLowerCase();
-    return flattenedAll.filter((e) => e.path.toLowerCase().includes(needle));
-  }, [filterActive, trimmedFilter, flattenedAll]);
-
-  // Keyboard navigation
-  const [highlightedPath, setHighlightedPath] = useState<string | null>(null);
-  const treeRef = useRef<HTMLDivElement | null>(null);
-
-  // Reset highlight if it falls out of the current list (e.g. when filter
-  // changes or dirs collapse).
-  useEffect(() => {
-    if (!highlightedPath) return;
-    const list = filterActive ? filterResults : flattenedVisible;
-    if (!list.some((e) => e.path === highlightedPath)) {
-      setHighlightedPath(null);
-    }
-  }, [highlightedPath, filterActive, filterResults, flattenedVisible]);
-
-  function onTreeKeyDown(e: KeyboardEvent<HTMLDivElement>) {
-    const list = filterActive ? filterResults : flattenedVisible;
-    if (list.length === 0) return;
-    const idx = highlightedPath
-      ? list.findIndex((entry) => entry.path === highlightedPath)
-      : -1;
-
-    if (e.key === 'ArrowDown') {
-      e.preventDefault();
-      const next = idx < 0 ? 0 : Math.min(list.length - 1, idx + 1);
-      const target = list[next];
-      if (target) setHighlightedPath(target.path);
-      return;
-    }
-    if (e.key === 'ArrowUp') {
-      e.preventDefault();
-      const next = idx <= 0 ? 0 : idx - 1;
-      const target = list[next];
-      if (target) setHighlightedPath(target.path);
-      return;
-    }
-    if (e.key === 'Enter') {
-      if (idx < 0) return;
-      const target = list[idx];
-      if (!target) return;
-      e.preventDefault();
-      if (target.kind === 'dir') {
-        toggleDir(target.path);
-      } else {
-        selectFile(target.path);
-      }
-    }
-  }
-
-  // Viewer state
-  const [viewer, setViewer] = useState<{
-    path: string;
-    state: 'loading' | 'ready' | 'error';
-    result?: ViewFileResult;
-    error?: string;
-  } | null>(null);
-
-  useEffect(() => {
-    if (!openFile) {
-      setViewer(null);
-      return;
-    }
-    let cancelled = false;
-    setViewer({ path: openFile, state: 'loading' });
-    (async () => {
-      try {
-        const result = await api.projects.viewFile(projectId, openFile);
-        if (cancelled) return;
-        setViewer({ path: openFile, state: 'ready', result });
-      } catch (err) {
-        if (cancelled) return;
-        let message: string;
-        if (err instanceof ApiError) {
-          const apiMsg =
-            typeof err.body === 'object' &&
-            err.body !== null &&
-            'error' in err.body
-              ? String((err.body as { error: unknown }).error)
-              : err.message;
-          if (err.status === 404) {
-            message = 'File not found';
-          } else if (apiMsg.toLowerCase().includes('too large')) {
-            message = 'File too large to view';
-          } else if (
-            apiMsg.toLowerCase().includes('outside') ||
-            apiMsg.toLowerCase().includes('not a file') ||
-            apiMsg.toLowerCase().includes('path')
-          ) {
-            message = 'Cannot view files outside project';
-          } else {
-            message = apiMsg;
-          }
-        } else if (err instanceof Error) {
-          message = err.message;
-        } else {
-          message = 'Failed to load file';
-        }
-        setViewer({ path: openFile, state: 'error', error: message });
-      }
-    })();
-    return () => {
-      cancelled = true;
-    };
-  }, [openFile, projectId]);
-
-  // Root errors / loading
-  const rootEntries = cache.get('');
-  const rootLoading = loadingDirs.has('') && !rootEntries;
-  const rootError = dirErrors.get('');
-
-  return (
-    <div className="flex flex-col h-full min-h-0">
-      <div className="px-2 py-1.5 border-b border-border bg-muted/20">
-        <input
-          type="text"
-          value={filterDraft}
-          onChange={(e) => onFilterInput(e.target.value)}
-          placeholder="Filter files..."
-          className="w-full px-2 py-1 text-xs bg-background border border-border rounded outline-none focus:border-ring"
-          aria-label="Filter files"
-        />
-      </div>
-      <div className="flex-1 min-h-0 grid grid-cols-[minmax(0,260px)_1fr]">
-        <div
-          ref={treeRef}
-          tabIndex={0}
-          onKeyDown={onTreeKeyDown}
-          className="overflow-y-auto border-r border-border outline-none focus:ring-1 focus:ring-inset focus:ring-ring/40"
-          role="tree"
-          aria-label="Project files"
-        >
-          {rootLoading && (
-            <div className="text-xs text-muted-foreground px-2 py-1.5">
-              Loading...
-            </div>
-          )}
-          {rootError && (
-            <div className="text-xs text-destructive px-2 py-1.5">
-              {rootError}
-            </div>
-          )}
-          {!rootLoading && !rootError && filterActive && (
-            <ul className="list-none">
-              {filterResults.length === 0 ? (
-                <li className="text-xs text-muted-foreground px-2 py-1.5">
-                  No matches
-                </li>
-              ) : (
-                filterResults.map((entry) => {
-                  const isActive =
-                    entry.kind === 'file' && openFile === entry.path;
-                  const isHighlight = highlightedPath === entry.path;
-                  return (
-                    <li key={entry.path}>
-                      <div
-                        className={cn(
-                          'flex items-center gap-1 px-2 py-0.5 text-xs cursor-default rounded hover:bg-muted/60',
-                          isActive && 'bg-muted',
-                          isHighlight && 'ring-1 ring-ring/40'
-                        )}
-                        onClick={() => {
-                          setHighlightedPath(entry.path);
-                          if (entry.kind === 'dir') {
-                            toggleDir(entry.path);
-                          } else {
-                            selectFile(entry.path);
-                          }
-                        }}
-                      >
-                        {entry.kind === 'dir' ? (
-                          <Folder size={12} className="text-muted-foreground shrink-0" />
-                        ) : (
-                          <FileText size={12} className="text-muted-foreground shrink-0" />
-                        )}
-                        <span className="truncate">{entry.path}</span>
-                      </div>
-                    </li>
-                  );
-                })
-              )}
-            </ul>
-          )}
-          {!rootLoading && !rootError && !filterActive && rootEntries && (
-            <TreeNode
-              parentPath=""
-              entries={rootEntries}
-              cache={cache}
-              expanded={expandedSet}
-              openFile={openFile}
-              highlightedPath={highlightedPath}
-              depth={0}
-              onToggleDir={toggleDir}
-              onSelectFile={selectFile}
-              setHighlightedPath={setHighlightedPath}
-            />
-          )}
-        </div>
-        <div className="flex flex-col min-h-0">
-          {!openFile && (
-            <div className="flex-1 flex items-center justify-center text-xs text-muted-foreground">
-              Select a file to view
-            </div>
-          )}
-          {openFile && (
-            <>
-              <div className="flex items-center justify-between px-2 py-1 border-b border-border bg-muted/20 shrink-0">
-                <span
-                  className="text-xs font-mono truncate"
-                  title={openFile}
-                >
-                  {basename(openFile)}
-                </span>
-                <button
-                  type="button"
-                  onClick={closeOpenFile}
-                  className="p-0.5 hover:bg-muted rounded shrink-0"
-                  aria-label="Close file"
-                >
-                  <X size={12} />
-                </button>
-              </div>
-              <div className="flex-1 min-h-0 overflow-y-auto">
-                {viewer?.state === 'loading' && (
-                  <div className="text-xs text-muted-foreground px-2 py-1.5">
-                    Loading...
-                  </div>
-                )}
-                {viewer?.state === 'error' && (
-                  <div className="text-xs text-destructive px-2 py-1.5">
-                    {viewer.error}
-                  </div>
-                )}
-                {viewer?.state === 'ready' && viewer.result && (
-                  <div className="p-2">
-                    {viewer.result.truncated && (
-                      <div className="text-[11px] text-muted-foreground mb-1 px-2 py-1 rounded bg-muted/40 border border-border">
-                        Showing first {viewer.result.bytes_returned} bytes; file is {viewer.result.total_bytes} bytes total.
-                      </div>
-                    )}
-                    <CodeBlock code={viewer.result.content} lang={deriveLang(openFile)} />
-                  </div>
-                )}
-              </div>
-            </>
-          )}
-        </div>
-      </div>
-    </div>
-  );
-}

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

@@ -1,31 +0,0 @@
-import type { ReactNode } from 'react';
-import type { Pane } from '@/api/types';
-import { X } from 'lucide-react';
-import { cn } from '@/lib/utils';
-
-interface Props {
-  pane: Pane;
-  onClose: () => void;
-  className?: string;
-  children: ReactNode;
-}
-
-export function PaneShell({ pane, onClose, className, children }: Props) {
-  const label = pane.kind === 'chat' ? 'Chat' : 'Files';
-  return (
-    <div className={cn('flex flex-col h-full min-h-0 border-r border-border last:border-r-0', className)}>
-      <div className="flex items-center justify-between px-3 py-1.5 border-b border-border bg-muted/30">
-        <span className="text-xs font-medium text-muted-foreground">{label}</span>
-        <button
-          type="button"
-          onClick={onClose}
-          className="p-0.5 hover:bg-muted rounded"
-          aria-label="Close pane"
-        >
-          <X size={12} />
-        </button>
-      </div>
-      <div className="flex-1 min-h-0 overflow-hidden">{children}</div>
-    </div>
-  );
-}

apps/web/src/hooks/sessionEvents.ts

@@ -2,7 +2,8 @@
 // across hooks (e.g. AI rename arriving via WS in the session view needs to
 // also refresh the sidebar's session list).
 
-import type { Project, Session } from '@/api/types';
+import type { Chat, Project, Session } from '@/api/types';
+import type { Attachment } from '@/lib/attachments';
 
 export interface SessionRenamedEvent {
   type: 'session_renamed';
@@ -51,6 +52,69 @@ export interface OpenFileInBrowserEvent {
   path: string; // project-relative
 }
 
+export interface AttachChatFileEvent {
+  type: 'attach_chat_file';
+  attachment: Omit<Attachment, 'id'>;
+}
+
+export interface OpenChatInActivePaneEvent {
+  type: 'open_chat_in_active_pane';
+  chat_id: string;
+}
+
+export interface SessionArchivedEvent {
+  type: 'session_archived';
+  session_id: string;
+  project_id: string;
+}
+
+export interface ChatCreatedEvent {
+  type: 'chat_created';
+  chat: Chat;
+  session_id: string;
+}
+
+export interface ChatUpdatedEvent {
+  type: 'chat_updated';
+  chat_id: string;
+  session_id: string;
+  name: string | null;
+  updated_at: string;
+}
+
+export interface ChatArchivedEvent {
+  type: 'chat_archived';
+  chat_id: string;
+  session_id: string;
+}
+
+export interface ChatUnarchivedEvent {
+  type: 'chat_unarchived';
+  chat: Chat;
+}
+
+export interface ChatDeletedEvent {
+  type: 'chat_deleted';
+  chat_id: string;
+  session_id: string;
+}
+
+export interface ProjectArchivedEvent {
+  type: 'project_archived';
+  project_id: string;
+}
+
+export interface ProjectUnarchivedEvent {
+  type: 'project_unarchived';
+  project: Project;
+}
+
+export interface ProjectUpdatedEvent {
+  type: 'project_updated';
+  project_id: string;
+  name: string;
+}
+
 export type SessionEvent =
   | SessionRenamedEvent
   | ProjectCreatedEvent
@@ -59,7 +123,18 @@ export type SessionEvent =
   | SessionDeletedEvent
   | SessionUpdatedEvent
   | SessionLoadedEvent
-  | OpenFileInBrowserEvent;
+  | OpenFileInBrowserEvent
+  | AttachChatFileEvent
+  | OpenChatInActivePaneEvent
+  | SessionArchivedEvent
+  | ChatCreatedEvent
+  | ChatUpdatedEvent
+  | ChatArchivedEvent
+  | ChatUnarchivedEvent
+  | ChatDeletedEvent
+  | ProjectArchivedEvent
+  | ProjectUnarchivedEvent
+  | ProjectUpdatedEvent;
 type Listener = (event: SessionEvent) => void;
 
 const listeners = new Set<Listener>();

apps/web/src/hooks/useActivePane.ts

@@ -0,0 +1,61 @@
+import { useEffect, useState } from 'react';
+import type { WorkspacePaneKind } from '@/api/types';
+
+export interface ActivePaneSnapshot {
+  sessionId: string | null;
+  paneId: string | null;
+  kind: WorkspacePaneKind | null;
+  activeFile: string | null;
+}
+
+const EMPTY: ActivePaneSnapshot = {
+  sessionId: null,
+  paneId: null,
+  kind: null,
+  activeFile: null,
+};
+
+let current: ActivePaneSnapshot = EMPTY;
+const subs = new Set<() => void>();
+
+function notify(): void {
+  for (const sub of subs) {
+    try {
+      sub();
+    } catch {
+      // swallow — one bad listener shouldn't break others
+    }
+  }
+}
+
+function isSame(a: ActivePaneSnapshot, b: ActivePaneSnapshot): boolean {
+  return (
+    a.sessionId === b.sessionId &&
+    a.paneId === b.paneId &&
+    a.kind === b.kind &&
+    a.activeFile === b.activeFile
+  );
+}
+
+export function setActivePaneInfo(next: ActivePaneSnapshot): void {
+  if (isSame(current, next)) return;
+  current = next;
+  notify();
+}
+
+export function clearActivePane(): void {
+  setActivePaneInfo(EMPTY);
+}
+
+export function useActivePane(): ActivePaneSnapshot {
+  const [snap, setSnap] = useState<ActivePaneSnapshot>(current);
+  useEffect(() => {
+    const sub = () => setSnap(current);
+    subs.add(sub);
+    sub();
+    return () => {
+      subs.delete(sub);
+    };
+  }, []);
+  return snap;
+}

apps/web/src/hooks/usePanes.ts

@@ -1,149 +0,0 @@
-import { useCallback, useEffect, useRef, useState } from 'react';
-import { api } from '@/api/client';
-import type { Pane, PaneCreateRequest, PaneState, PaneUpdateRequest } from '@/api/types';
-
-export function usePanes(sessionId: string | undefined): {
-  panes: Pane[] | null;
-  loading: boolean;
-  error: string | null;
-  refresh: () => Promise<void>;
-  create: (body: PaneCreateRequest) => Promise<Pane>;
-  update: (id: string, body: PaneUpdateRequest) => Promise<void>;
-  remove: (id: string) => Promise<void>;
-} {
-  const [panes, setPanes] = useState<Pane[] | null>(null);
-  const [loading, setLoading] = useState(false);
-  const [error, setError] = useState<string | null>(null);
-
-  // Pending debounced state PATCHes: pane id -> latest PaneState
-  const pendingState = useRef<Map<string, PaneState>>(new Map());
-  const debounceTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
-
-  const refresh = useCallback(async () => {
-    if (!sessionId) {
-      setPanes(null);
-      return;
-    }
-    setLoading(true);
-    try {
-      const { panes: list } = await api.panes.getForSession(sessionId);
-      setPanes(list);
-      setError(null);
-    } catch (err) {
-      setError(err instanceof Error ? err.message : 'pane operation failed');
-    } finally {
-      setLoading(false);
-    }
-  }, [sessionId]);
-
-  const flushPendingState = useCallback(async () => {
-    if (debounceTimer.current !== null) {
-      clearTimeout(debounceTimer.current);
-      debounceTimer.current = null;
-    }
-    const updates = Array.from(pendingState.current.entries());
-    pendingState.current.clear();
-    if (updates.length === 0) return;
-    try {
-      await Promise.all(updates.map(([id, state]) => api.panes.update(id, { state })));
-    } catch (err) {
-      setError(err instanceof Error ? err.message : 'pane state PATCH failed');
-      // server truth may diverge from optimistic local state; resync
-      void refresh();
-    }
-  }, [refresh]);
-
-  // Fetch on mount / sessionId change; preserve previous list while reloading
-  // (loading=true but panes stays non-null after first fetch to avoid flash)
-  useEffect(() => {
-    void refresh();
-  }, [refresh]);
-
-  // Flush debounced PATCHes on unmount
-  useEffect(() => {
-    return () => {
-      flushPendingState();
-    };
-  }, [flushPendingState]);
-
-  const create = useCallback(
-    async (body: PaneCreateRequest): Promise<Pane> => {
-      if (!sessionId) throw new Error('no session');
-      const created = await api.panes.create(sessionId, body);
-      await refresh();
-      return created;
-    },
-    [sessionId, refresh]
-  );
-
-  const update = useCallback(
-    async (id: string, body: PaneUpdateRequest): Promise<void> => {
-      if (body.state !== undefined && body.position === undefined) {
-        const nextState = body.state;
-        // Optimistic local update
-        setPanes((prev) => {
-          if (!prev) return prev;
-          let changed = false;
-          const next = prev.map((pane) => {
-            if (pane.id !== id) return pane;
-            changed = true;
-            // Narrow via discriminated union to satisfy TypeScript
-            if (pane.kind === 'chat') {
-              return { ...pane, state: nextState as typeof pane.state };
-            }
-            if (pane.kind === 'file_browser') {
-              return { ...pane, state: nextState as typeof pane.state };
-            }
-            return pane;
-          });
-          return changed ? next : prev;
-        });
-
-        // Coalesce: last state wins within debounce window
-        pendingState.current.set(id, nextState);
-
-        if (debounceTimer.current !== null) {
-          clearTimeout(debounceTimer.current);
-        }
-        debounceTimer.current = setTimeout(() => {
-          debounceTimer.current = null;
-          flushPendingState();
-        }, 300);
-      } else {
-        // position involved — fire immediately
-        try {
-          await api.panes.update(id, body);
-          await refresh();
-        } catch (err) {
-          setError(err instanceof Error ? err.message : 'pane operation failed');
-          throw err;
-        }
-      }
-    },
-    [refresh, flushPendingState]
-  );
-
-  const remove = useCallback(
-    async (id: string): Promise<void> => {
-      // Optimistic remove — capture snapshot inside functional updater to avoid stale closure
-      let snapshot: Pane[] | null = null;
-      setPanes((prev) => {
-        snapshot = prev;
-        return prev ? prev.filter((p) => p.id !== id) : prev;
-      });
-
-      try {
-        await api.panes.remove(id);
-        await refresh();
-      } catch (err) {
-        // Rollback to the truly-most-recent value captured above
-        setPanes(snapshot);
-        setError(err instanceof Error ? err.message : 'pane operation failed');
-        throw err;
-      }
-    },
-    [refresh]
-  );
-
-  return { panes, loading, error, refresh, create, update, remove };
-}

apps/web/src/hooks/useProjects.ts

@@ -1,7 +1,6 @@
 import { useCallback, useEffect, useState } from 'react';
 import { api } from '@/api/client';
 import type { Project } from '@/api/types';
-import { sessionEvents } from './sessionEvents';
 
 export function useProjects() {
   const [projects, setProjects] = useState<Project[] | null>(null);
@@ -33,7 +32,6 @@ export function useProjects() {
   const remove = useCallback(
     async (id: string) => {
       await api.projects.remove(id);
-      sessionEvents.emit({ type: 'project_deleted', project_id: id });
       await refresh();
     },
     [refresh]

apps/web/src/hooks/useSessionChats.ts

@@ -0,0 +1,175 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
+import { toast } from 'sonner';
+import { api } from '@/api/client';
+import type { Chat } from '@/api/types';
+import { sessionEvents } from '@/hooks/sessionEvents';
+
+export interface UseSessionChatsOpts {
+  removeChatFromPanes: (chatId: string) => void;
+  openChatInPane: (paneIdx: number, chatId: string) => void;
+  // Thin wrapper around openChatInPane(activePaneIdxRef.current, chatId);
+  // built by Workspace and passed in so this hook doesn't need to know
+  // about pane indexing.
+  openChatInActivePane: (chatId: string) => void;
+  initializeFirstChatIfEmpty: (chatId: string) => void;
+}
+
+export interface UseSessionChatsResult {
+  chats: Chat[];
+  setChats: React.Dispatch<React.SetStateAction<Chat[]>>;
+  createChat: (paneIdx: number) => Promise<void>;
+  archiveChat: (chatId: string) => Promise<void>;
+  unarchiveChat: (chatId: string) => Promise<void>;
+  deleteChat: (chatId: string) => Promise<void>;
+  renameChat: (chatId: string, name: string) => Promise<void>;
+  handleLandingSend: (paneIdx: number, content: string) => Promise<void>;
+}
+
+export function useSessionChats(
+  sessionId: string,
+  opts: UseSessionChatsOpts,
+): UseSessionChatsResult {
+  const [chats, setChats] = useState<Chat[]>([]);
+  const chatsRef = useRef<Chat[]>([]);
+  chatsRef.current = chats;
+
+  // Stable refs to opts callbacks so the subscription effect — which only
+  // re-runs on sessionId change — always sees the latest closures without
+  // unsubscribe/resubscribe churn.
+  const removeChatFromPanesRef = useRef(opts.removeChatFromPanes);
+  removeChatFromPanesRef.current = opts.removeChatFromPanes;
+  const openChatInPaneRef = useRef(opts.openChatInPane);
+  openChatInPaneRef.current = opts.openChatInPane;
+  const openChatInActivePaneRef = useRef(opts.openChatInActivePane);
+  openChatInActivePaneRef.current = opts.openChatInActivePane;
+  const initializeFirstChatIfEmptyRef = useRef(opts.initializeFirstChatIfEmpty);
+  initializeFirstChatIfEmptyRef.current = opts.initializeFirstChatIfEmpty;
+
+  useEffect(() => {
+    let cancelled = false;
+    api.chats.listForSession(sessionId).then((list) => {
+      if (cancelled) return;
+      setChats(list);
+      const openChat = list.find((c) => c.status === 'open');
+      if (openChat) {
+        initializeFirstChatIfEmptyRef.current(openChat.id);
+      }
+    }).catch(() => {});
+    return () => { cancelled = true; };
+  }, [sessionId]);
+
+  useEffect(() => {
+    return sessionEvents.subscribe((event) => {
+      if (event.type === 'chat_created' && event.session_id === sessionId) {
+        setChats((prev) => {
+          if (prev.some((c) => c.id === event.chat.id)) return prev;
+          return [event.chat, ...prev];
+        });
+      }
+      if (event.type === 'chat_updated') {
+        setChats((prev) => prev.map((c) =>
+          c.id === event.chat_id ? { ...c, name: event.name, updated_at: event.updated_at } : c
+        ));
+      }
+      if (event.type === 'chat_archived') {
+        setChats((prev) => prev.map((c) =>
+          c.id === event.chat_id ? { ...c, status: 'archived' as const } : c
+        ));
+        removeChatFromPanesRef.current(event.chat_id);
+      }
+      if (event.type === 'chat_unarchived') {
+        setChats((prev) => {
+          if (prev.some((c) => c.id === event.chat.id)) {
+            return prev.map((c) => c.id === event.chat.id ? { ...c, status: 'open' as const } : c);
+          }
+          return [event.chat, ...prev];
+        });
+      }
+      if (event.type === 'chat_deleted') {
+        setChats((prev) => prev.filter((c) => c.id !== event.chat_id));
+        removeChatFromPanesRef.current(event.chat_id);
+      }
+      if (event.type === 'open_chat_in_active_pane') {
+        openChatInActivePaneRef.current(event.chat_id);
+      }
+    });
+  }, [sessionId]);
+
+  const createChat = useCallback(async (paneIdx: number) => {
+    try {
+      const chat = await api.chats.create(sessionId);
+      // Optimistic local insert; the WS chat_created echo will be deduped by id.
+      setChats((prev) => {
+        if (prev.some((c) => c.id === chat.id)) return prev;
+        return [chat, ...prev];
+      });
+      openChatInPaneRef.current(paneIdx, chat.id);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Failed to create chat');
+    }
+  }, [sessionId]);
+
+  const archiveChat = useCallback(async (chatId: string) => {
+    try {
+      await api.chats.archive(chatId);
+      // Server publishes chat_archived; bus forwarder updates state.
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Failed to archive chat');
+    }
+  }, []);
+
+  const unarchiveChat = useCallback(async (chatId: string) => {
+    try {
+      await api.chats.unarchive(chatId);
+      // Server publishes chat_unarchived.
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Failed to restore chat');
+    }
+  }, []);
+
+  const deleteChat = useCallback(async (chatId: string) => {
+    try {
+      await api.chats.remove(chatId);
+      setChats((prev) => prev.filter((c) => c.id !== chatId));
+      removeChatFromPanesRef.current(chatId);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Failed to delete chat');
+    }
+  }, []);
+
+  const renameChat = useCallback(async (chatId: string, name: string) => {
+    try {
+      await api.chats.update(chatId, { name });
+      setChats((prev) => prev.map((c) =>
+        c.id === chatId ? { ...c, name } : c
+      ));
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Failed to rename chat');
+    }
+  }, []);
+
+  const handleLandingSend = useCallback(async (paneIdx: number, content: string) => {
+    try {
+      const chat = await api.chats.create(sessionId);
+      setChats((prev) => {
+        if (prev.some((c) => c.id === chat.id)) return prev;
+        return [chat, ...prev];
+      });
+      openChatInPaneRef.current(paneIdx, chat.id);
+      await api.messages.send(chat.id, content);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Failed to send');
+    }
+  }, [sessionId]);
+
+  return {
+    chats,
+    setChats,
+    createChat,
+    archiveChat,
+    unarchiveChat,
+    deleteChat,
+    renameChat,
+    handleLandingSend,
+  };
+}

apps/web/src/hooks/useSessionStream.ts

@@ -19,8 +19,10 @@ function applyFrame(state: State, frame: WsFrame): State {
       const newMsg: Message = {
         id: frame.message_id,
         session_id: '',
+        chat_id: frame.chat_id ?? '',
         role: frame.role,
         content: '',
+        kind: 'message',
         tool_calls: null,
         tool_results: null,
         status: 'streaming',
@@ -71,8 +73,10 @@ function applyFrame(state: State, frame: WsFrame): State {
       const newMsg: Message = {
         id: frame.tool_message_id,
         session_id: '',
+        chat_id: frame.chat_id ?? '',
         role: 'tool',
         content: '',
+        kind: 'message',
         tool_calls: null,
         tool_results: {
           tool_call_id: frame.tool_call_id,
@@ -115,7 +119,6 @@ function applyFrame(state: State, frame: WsFrame): State {
       };
     }
     case 'session_renamed': {
-      // Side-effect, not state — dispatch via event bus to other hooks.
       sessionEvents.emit({
         type: 'session_renamed',
         session_id: frame.session_id,
@@ -123,6 +126,16 @@ function applyFrame(state: State, frame: WsFrame): State {
       });
       return state;
     }
+    case 'chat_renamed': {
+      sessionEvents.emit({
+        type: 'chat_updated',
+        chat_id: frame.chat_id,
+        session_id: '',
+        name: frame.name,
+        updated_at: new Date().toISOString(),
+      });
+      return state;
+    }
     case 'error': {
       const next = frame.message_id
         ? state.messages.map((m) =>

apps/web/src/hooks/useSidebar.ts

@@ -52,9 +52,12 @@ function load(): Promise<void> {
 function applyEvent(prev: SidebarResponse, event: import('./sessionEvents').SessionEvent): SidebarResponse {
   switch (event.type) {
     case 'project_created': {
+      if (prev.projects.some((p) => p.id === event.project.id)) return prev;
       const fresh: SidebarProject = {
         id: event.project.id,
         name: event.project.name,
+        path: event.project.path,
+        gitea_remote: event.project.gitea_remote ?? null,
         recent_sessions: [],
         total_sessions: 0,
       };
@@ -69,6 +72,7 @@ function applyEvent(prev: SidebarResponse, event: import('./sessionEvents').Sess
       let changed = false;
       const projects = prev.projects.map((p) => {
         if (p.id !== event.project_id) return p;
+        if (p.recent_sessions.some((s) => s.id === event.session.id)) return p;
         changed = true;
         const fresh: SidebarSession = {
           id: event.session.id,
@@ -89,8 +93,10 @@ function applyEvent(prev: SidebarResponse, event: import('./sessionEvents').Sess
       let changed = false;
       const projects = prev.projects.map((p) => {
         if (p.id !== event.project_id) return p;
-        changed = true;
         const recent = p.recent_sessions.filter((s) => s.id !== event.session_id);
+        const wasPresent = recent.length !== p.recent_sessions.length;
+        if (!wasPresent) return p;
+        changed = true;
         return {
           ...p,
           recent_sessions: recent,
@@ -140,26 +146,82 @@ function applyEvent(prev: SidebarResponse, event: import('./sessionEvents').Sess
     case 'open_file_in_browser':
       // Consumed by Workspace (T7); no sidebar state change needed.
       return prev;
+    case 'attach_chat_file':
+      return prev;
+    case 'open_chat_in_active_pane':
+      // Consumed by Workspace; sidebar has no business with pane state.
+      return prev;
+    case 'session_archived': {
+      let changed = false;
+      const projects = prev.projects.map((p) => {
+        if (p.id !== event.project_id) return p;
+        const recent = p.recent_sessions.filter((s) => s.id !== event.session_id);
+        if (recent.length === p.recent_sessions.length) return p;
+        changed = true;
+        return {
+          ...p,
+          recent_sessions: recent,
+          total_sessions: Math.max(0, p.total_sessions - 1),
+        };
+      });
+      return changed ? { ...prev, projects } : prev;
+    }
+    case 'chat_created':
+    case 'chat_updated':
+    case 'chat_archived':
+    case 'chat_unarchived':
+    case 'chat_deleted':
+      return prev;
+    case 'project_archived': {
+      const next = prev.projects.filter((p) => p.id !== event.project_id);
+      if (next.length === prev.projects.length) return prev;
+      return { ...prev, projects: next };
+    }
+    case 'project_unarchived': {
+      if (prev.projects.some((p) => p.id === event.project.id)) return prev;
+      const fresh: SidebarProject = {
+        id: event.project.id,
+        name: event.project.name,
+        path: event.project.path,
+        gitea_remote: event.project.gitea_remote ?? null,
+        recent_sessions: [],
+        total_sessions: 0,
+      };
+      return { ...prev, projects: [fresh, ...prev.projects] };
+    }
+    case 'project_updated': {
+      let changed = false;
+      const projects = prev.projects.map((p) => {
+        if (p.id !== event.project_id) return p;
+        if (p.name === event.name) return p;
+        changed = true;
+        return { ...p, name: event.name };
+      });
+      return changed ? { ...prev, projects } : prev;
+    }
   }
 }
 
 // One bus subscription for the lifetime of the module. Events arriving
 // before the initial fetch resolves are dropped; the eventual fetch
 // result is the source of truth.
-sessionEvents.subscribe((event) => {
-  // session_loaded updates activeSessionProjectId regardless of whether
-  // sharedData is populated yet — notify so subscribers can re-read.
-  if (event.type === 'session_loaded') {
-    activeSession = { session_id: event.session_id, project_id: event.project_id };
+// Guard prevents duplicate listeners during Vite HMR reloads.
+const G = globalThis as Record<string, unknown>;
+if (!G.__boocode_sidebar_subscribed) {
+  G.__boocode_sidebar_subscribed = true;
+  sessionEvents.subscribe((event) => {
+    if (event.type === 'session_loaded') {
+      activeSession = { session_id: event.session_id, project_id: event.project_id };
+      notify();
+      return;
+    }
+    if (!sharedData) return;
+    const next = applyEvent(sharedData, event);
+    if (next === sharedData) return;
+    sharedData = next;
     notify();
-    return;
-  }
-  if (!sharedData) return;
-  const next = applyEvent(sharedData, event);
-  if (next === sharedData) return;
-  sharedData = next;
-  notify();
-});
+  });
+}
 
 interface Snapshot {
   data: SidebarResponse | null;

apps/web/src/hooks/useWorkspacePanes.ts

@@ -0,0 +1,339 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
+import type { DragEvent } from 'react';
+import { toast } from 'sonner';
+import type { WorkspacePane } from '@/api/types';
+import { setActivePaneInfo, clearActivePane } from '@/hooks/useActivePane';
+
+export const MAX_PANES = 5;
+const STORAGE_KEY = 'boocode.workspace.panes';
+
+function generateId(): string {
+  return crypto.randomUUID();
+}
+
+function emptyPane(): WorkspacePane {
+  return { id: generateId(), kind: 'empty', chatIds: [], activeChatIdx: -1 };
+}
+
+function chatPane(chatId: string): WorkspacePane {
+  return { id: generateId(), kind: 'chat', chatId, chatIds: [chatId], activeChatIdx: 0 };
+}
+
+function loadPanes(sessionId: string): WorkspacePane[] | null {
+  try {
+    const raw = localStorage.getItem(`${STORAGE_KEY}.${sessionId}`);
+    if (!raw) return null;
+    const parsed = JSON.parse(raw) as WorkspacePane[];
+    if (!Array.isArray(parsed) || parsed.length === 0) return null;
+    return parsed;
+  } catch {
+    return null;
+  }
+}
+
+function savePanes(sessionId: string, panes: WorkspacePane[]): void {
+  try {
+    localStorage.setItem(`${STORAGE_KEY}.${sessionId}`, JSON.stringify(panes));
+  } catch { /* quota or disabled */ }
+}
+
+export interface UseWorkspacePanesResult {
+  panes: WorkspacePane[];
+  activePaneIdx: number;
+  setActivePaneIdx: React.Dispatch<React.SetStateAction<number>>;
+  activePaneIdxRef: React.MutableRefObject<number>;
+  openChatInPane: (paneIdx: number, chatId: string) => void;
+  switchTab: (paneIdx: number, tabIdx: number) => void;
+  removeTab: (paneIdx: number, chatId: string) => void;
+  closeOtherTabs: (paneIdx: number, keepChatId: string) => void;
+  closeTabsToRight: (paneIdx: number, pivotChatId: string) => void;
+  closeAllTabs: (paneIdx: number) => void;
+  showLandingPage: (paneIdx: number) => void;
+  addSplitPane: (kind: 'chat' | 'terminal' | 'agent') => void;
+  removePane: (idx: number) => void;
+  removeChatFromPanes: (chatId: string) => void;
+  initializeFirstChatIfEmpty: (chatId: string) => void;
+  handlePaneDragStart: (idx: number) => (e: DragEvent<HTMLDivElement>) => void;
+  handlePaneDragOver: (idx: number) => (e: DragEvent<HTMLDivElement>) => void;
+  handlePaneDragLeave: () => void;
+  handlePaneDrop: (targetIdx: number) => (e: DragEvent<HTMLDivElement>) => void;
+  handlePaneDragEnd: () => void;
+  dragOverIdx: number | null;
+  draggingIdxRef: React.MutableRefObject<number | null>;
+}
+
+export function useWorkspacePanes(sessionId: string): UseWorkspacePanesResult {
+  const [panes, setPanes] = useState<WorkspacePane[]>(() => {
+    return loadPanes(sessionId) ?? [emptyPane()];
+  });
+  const [activePaneIdx, setActivePaneIdx] = useState(0);
+  const draggingIdxRef = useRef<number | null>(null);
+  const [dragOverIdx, setDragOverIdx] = useState<number | null>(null);
+
+  useEffect(() => {
+    savePanes(sessionId, panes);
+  }, [sessionId, panes]);
+
+  useEffect(() => {
+    const active = panes[activePaneIdx];
+    if (!active) {
+      clearActivePane();
+      return;
+    }
+    setActivePaneInfo({
+      sessionId,
+      paneId: active.id,
+      kind: active.kind,
+      activeFile: null,
+    });
+  }, [sessionId, panes, activePaneIdx]);
+
+  useEffect(() => {
+    return () => {
+      clearActivePane();
+    };
+  }, []);
+
+  const activePaneIdxRef = useRef(activePaneIdx);
+  activePaneIdxRef.current = activePaneIdx;
+
+  const openChatInPane = useCallback((paneIdx: number, chatId: string) => {
+    setPanes((prev) => {
+      const next = [...prev];
+      const pane = next[paneIdx]!;
+      const existing = pane.chatIds.indexOf(chatId);
+      if (existing >= 0) {
+        next[paneIdx] = { ...pane, kind: 'chat', chatId, activeChatIdx: existing };
+      } else {
+        const newIds = [...pane.chatIds, chatId];
+        next[paneIdx] = {
+          ...pane,
+          kind: 'chat',
+          chatId,
+          chatIds: newIds,
+          activeChatIdx: newIds.length - 1,
+        };
+      }
+      return next;
+    });
+    setActivePaneIdx(paneIdx);
+  }, []);
+
+  const switchTab = useCallback((paneIdx: number, tabIdx: number) => {
+    setPanes((prev) => {
+      const next = [...prev];
+      const pane = next[paneIdx]!;
+      const chatId = pane.chatIds[tabIdx];
+      if (!chatId) return prev;
+      next[paneIdx] = { ...pane, chatId, activeChatIdx: tabIdx };
+      return next;
+    });
+  }, []);
+
+  const removeTab = useCallback((paneIdx: number, chatId: string) => {
+    setPanes((prev) => {
+      const next = [...prev];
+      const pane = next[paneIdx]!;
+      const nextIds = pane.chatIds.filter((id) => id !== chatId);
+      if (nextIds.length === 0) {
+        next[paneIdx] = { ...pane, kind: 'empty', chatId: undefined, chatIds: [], activeChatIdx: -1 };
+      } else {
+        const nextActiveIdx = Math.min(pane.activeChatIdx, nextIds.length - 1);
+        next[paneIdx] = {
+          ...pane,
+          chatIds: nextIds,
+          activeChatIdx: nextActiveIdx,
+          chatId: nextIds[nextActiveIdx],
+        };
+      }
+      return next;
+    });
+  }, []);
+
+  // Keep only the right-clicked tab open in this pane.
+  const closeOtherTabs = useCallback((paneIdx: number, keepChatId: string) => {
+    setPanes((prev) => {
+      const next = [...prev];
+      const pane = next[paneIdx]!;
+      const keepIdx = pane.chatIds.indexOf(keepChatId);
+      if (keepIdx < 0) return prev;
+      next[paneIdx] = {
+        ...pane,
+        kind: 'chat',
+        chatId: keepChatId,
+        chatIds: [keepChatId],
+        activeChatIdx: 0,
+      };
+      return next;
+    });
+  }, []);
+
+  // Close every tab to the right of the right-clicked one.
+  const closeTabsToRight = useCallback((paneIdx: number, pivotChatId: string) => {
+    setPanes((prev) => {
+      const next = [...prev];
+      const pane = next[paneIdx]!;
+      const pivotIdx = pane.chatIds.indexOf(pivotChatId);
+      if (pivotIdx < 0 || pivotIdx === pane.chatIds.length - 1) return prev;
+      const nextIds = pane.chatIds.slice(0, pivotIdx + 1);
+      const nextActiveIdx = Math.min(pane.activeChatIdx, nextIds.length - 1);
+      next[paneIdx] = {
+        ...pane,
+        chatIds: nextIds,
+        activeChatIdx: nextActiveIdx,
+        chatId: nextIds[nextActiveIdx],
+      };
+      return next;
+    });
+  }, []);
+
+  // Close every tab in this pane; land on landing page.
+  const closeAllTabs = useCallback((paneIdx: number) => {
+    setPanes((prev) => {
+      const next = [...prev];
+      const pane = next[paneIdx]!;
+      next[paneIdx] = { ...pane, kind: 'empty', chatId: undefined, chatIds: [], activeChatIdx: -1 };
+      return next;
+    });
+  }, []);
+
+  const showLandingPage = useCallback((paneIdx: number) => {
+    setPanes((prev) => {
+      const next = [...prev];
+      const pane = next[paneIdx]!;
+      next[paneIdx] = { ...pane, kind: 'empty', chatId: undefined };
+      return next;
+    });
+  }, []);
+
+  const addSplitPane = useCallback((kind: 'chat' | 'terminal' | 'agent') => {
+    if (kind === 'terminal') {
+      toast('Terminal panes coming in BooTerm');
+      return;
+    }
+    if (kind === 'agent') {
+      toast('Agent panes coming in BooCoder');
+      return;
+    }
+    setPanes((prev) => {
+      if (prev.length >= MAX_PANES) {
+        toast.error(`Maximum ${MAX_PANES} panes`);
+        return prev;
+      }
+      const next = [...prev, emptyPane()];
+      setActivePaneIdx(next.length - 1);
+      return next;
+    });
+  }, []);
+
+  const removePane = useCallback((idx: number) => {
+    setPanes((prev) => {
+      if (prev.length <= 1) return prev;
+      const next = prev.filter((_, i) => i !== idx);
+      setActivePaneIdx((ai) => Math.min(ai, next.length - 1));
+      return next;
+    });
+  }, []);
+
+  // Replaces a single empty default pane with a chat pane. Used by the initial
+  // chat fetch to land on the most-recent open chat if no saved pane state.
+  const initializeFirstChatIfEmpty = useCallback((chatId: string) => {
+    setPanes((prev) => {
+      if (prev.length === 1 && prev[0]!.kind === 'empty') {
+        return [chatPane(chatId)];
+      }
+      return prev;
+    });
+  }, []);
+
+  const removeChatFromPanes = useCallback((chatId: string) => {
+    setPanes((prev) => prev.map((p) => {
+      const idx = p.chatIds.indexOf(chatId);
+      if (idx < 0) return p;
+      const nextIds = p.chatIds.filter((id) => id !== chatId);
+      if (nextIds.length === 0) {
+        return { ...p, kind: 'empty' as const, chatId: undefined, chatIds: [], activeChatIdx: -1 };
+      }
+      const nextActiveIdx = Math.min(p.activeChatIdx, nextIds.length - 1);
+      return {
+        ...p,
+        chatIds: nextIds,
+        activeChatIdx: nextActiveIdx,
+        chatId: nextIds[nextActiveIdx],
+      };
+    }));
+  }, []);
+
+  const handlePaneDragStart = useCallback(
+    (idx: number) => (e: DragEvent<HTMLDivElement>) => {
+      draggingIdxRef.current = idx;
+      e.dataTransfer.effectAllowed = 'move';
+      e.dataTransfer.setData('text/plain', String(idx));
+    },
+    []
+  );
+
+  const handlePaneDragOver = useCallback(
+    (idx: number) => (e: DragEvent<HTMLDivElement>) => {
+      if (draggingIdxRef.current === null) return;
+      e.preventDefault();
+      e.dataTransfer.dropEffect = 'move';
+      if (dragOverIdx !== idx) setDragOverIdx(idx);
+    },
+    [dragOverIdx]
+  );
+
+  const handlePaneDragLeave = useCallback(() => {
+    setDragOverIdx(null);
+  }, []);
+
+  const handlePaneDrop = useCallback(
+    (targetIdx: number) => (e: DragEvent<HTMLDivElement>) => {
+      e.preventDefault();
+      const fromIdx = draggingIdxRef.current;
+      draggingIdxRef.current = null;
+      setDragOverIdx(null);
+      if (fromIdx === null || fromIdx === targetIdx) return;
+      setPanes((prev) => {
+        const next = [...prev];
+        const [moved] = next.splice(fromIdx, 1);
+        if (!moved) return prev;
+        next.splice(targetIdx, 0, moved);
+        // Keep active selection on the same logical pane (the one being dragged).
+        setActivePaneIdx(targetIdx);
+        return next;
+      });
+    },
+    []
+  );
+
+  const handlePaneDragEnd = useCallback(() => {
+    draggingIdxRef.current = null;
+    setDragOverIdx(null);
+  }, []);
+
+  return {
+    panes,
+    activePaneIdx,
+    setActivePaneIdx,
+    activePaneIdxRef,
+    openChatInPane,
+    switchTab,
+    removeTab,
+    closeOtherTabs,
+    closeTabsToRight,
+    closeAllTabs,
+    showLandingPage,
+    addSplitPane,
+    removePane,
+    removeChatFromPanes,
+    initializeFirstChatIfEmpty,
+    handlePaneDragStart,
+    handlePaneDragOver,
+    handlePaneDragLeave,
+    handlePaneDrop,
+    handlePaneDragEnd,
+    dragOverIdx,
+    draggingIdxRef,
+  };
+}

apps/web/src/lib/attachments.ts

@@ -0,0 +1,44 @@
+export type Attachment = {
+  id: string;
+  kind: 'file' | 'lines' | 'paste';
+  filename: string;
+  language: string | null;
+  content: string;
+  range?: [number, number];
+  source: '@' | 'line-select' | 'drop' | 'paste';
+};
+
+export const LANG_MAP: Record<string, string> = {
+  ts: 'typescript', tsx: 'tsx', js: 'javascript', jsx: 'jsx',
+  mjs: 'javascript', cjs: 'javascript',
+  py: 'python', go: 'go', rs: 'rust', rb: 'ruby', java: 'java',
+  c: 'c', h: 'c', cpp: 'cpp', cc: 'cpp', hpp: 'cpp', cs: 'csharp',
+  php: 'php', sh: 'bash', bash: 'bash', zsh: 'bash',
+  yml: 'yaml', yaml: 'yaml', json: 'json', toml: 'toml',
+  md: 'markdown', markdown: 'markdown', sql: 'sql', dockerfile: 'dockerfile',
+  html: 'html', htm: 'html', css: 'css', scss: 'scss',
+};
+
+export function inferLanguage(filename: string): string | null {
+  const base = filename.split('/').pop() ?? filename;
+  if (base.toLowerCase() === 'dockerfile') return 'dockerfile';
+  const m = base.match(/\.([^.]+)$/);
+  return m ? (LANG_MAP[m[1]!.toLowerCase()] ?? null) : null;
+}
+
+export function flattenToMessage(attachments: Attachment[], text: string): string {
+  if (attachments.length === 0) return text;
+  const blocks = attachments.map(a => {
+    const fence = '```' + (a.language ?? '');
+    let header: string;
+    if (a.kind === 'lines') {
+      header = `// from: ${a.filename}:${a.range?.[0] ?? '?'}-${a.range?.[1] ?? '?'}`;
+    } else if (a.kind === 'paste') {
+      header = `// from: pasted text (${a.content.split('\n').length} lines)`;
+    } else {
+      header = `// from: ${a.filename}`;
+    }
+    return `${fence}\n${header}\n${a.content}\n\`\`\``;
+  });
+  return [...blocks, text].filter(Boolean).join('\n\n');
+}

apps/web/src/lib/format.ts

@@ -0,0 +1,5 @@
+export function formatTokens(n: number | null | undefined): string | null {
+  if (n === null || n === undefined) return null;
+  if (n < 1000) return `${n} tok`;
+  return `${(n / 1000).toFixed(1)}k tok`;
+}

apps/web/src/lib/projectUrls.ts

@@ -0,0 +1,5 @@
+export function giteaUrlFor(project: { path: string; gitea_remote?: string | null }): string {
+  if (project.gitea_remote) return project.gitea_remote;
+  const folderName = project.path.split('/').filter(Boolean).pop() ?? '';
+  return `https://git.indifferentketchup.com/indifferentketchup/${folderName}`;
+}

apps/web/src/pages/Home.tsx

@@ -1,35 +1,135 @@
-import { useState } from 'react';
+import { useEffect, useState } from 'react';
+import { ChevronDown, ChevronRight, Folder, RotateCcw } from 'lucide-react';
+import { toast } from 'sonner';
 import { Button } from '@/components/ui/button';
 import { AddProjectModal } from '@/components/AddProjectModal';
+import { CreateProjectModal } from '@/components/CreateProjectModal';
+import { api } from '@/api/client';
+import type { Project } from '@/api/types';
+import { sessionEvents } from '@/hooks/sessionEvents';
 import { useSidebar } from '@/hooks/useSidebar';
 
 export function Home() {
   const { data } = useSidebar();
-  const [open, setOpen] = useState(false);
+  const [addOpen, setAddOpen] = useState(false);
+  const [createOpen, setCreateOpen] = useState(false);
+  const [archived, setArchived] = useState<Project[] | null>(null);
+  const [showArchived, setShowArchived] = useState(false);
 
   const empty = data ? data.projects.length === 0 : false;
 
+  useEffect(() => {
+    api.projects.list({ status: 'archived' })
+      .then(setArchived)
+      .catch(() => {});
+  }, []);
+
+  useEffect(() => {
+    return sessionEvents.subscribe((event) => {
+      if (event.type === 'project_archived') {
+        setArchived((prev) => {
+          if (!prev) return prev;
+          if (prev.some((p) => p.id === event.project_id)) return prev;
+          const fromSidebar = data?.projects.find((p) => p.id === event.project_id);
+          if (!fromSidebar) return prev;
+          return [
+            {
+              id: fromSidebar.id,
+              name: fromSidebar.name,
+              path: fromSidebar.path,
+              added_at: new Date().toISOString(),
+              last_session_id: null,
+              status: 'archived' as const,
+              gitea_remote: fromSidebar.gitea_remote,
+            },
+            ...prev,
+          ];
+        });
+      }
+      if (event.type === 'project_unarchived') {
+        setArchived((prev) => prev ? prev.filter((p) => p.id !== event.project.id) : prev);
+      }
+      if (event.type === 'project_deleted') {
+        setArchived((prev) => prev ? prev.filter((p) => p.id !== event.project_id) : prev);
+      }
+      if (event.type === 'project_updated') {
+        setArchived((prev) =>
+          prev ? prev.map((p) => p.id === event.project_id ? { ...p, name: event.name } : p) : prev
+        );
+      }
+    });
+  }, [data]);
+
+  async function handleUnarchive(id: string) {
+    try {
+      await api.projects.unarchive(id);
+      // Server publishes project_unarchived; useUserEvents delivers it.
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'failed to restore project');
+    }
+  }
+
   return (
-    <div className="flex-1 flex items-center justify-center px-6">
-      <div className="max-w-md text-center space-y-4">
-        {empty ? (
-          <>
-            <h1 className="text-2xl font-semibold tracking-tight">No projects yet</h1>
-            <p className="text-sm text-muted-foreground">
-              Add a project from /opt to start chatting about its code.
-            </p>
-            <Button onClick={() => setOpen(true)}>Add project</Button>
-          </>
-        ) : (
-          <>
-            <h1 className="text-2xl font-semibold tracking-tight">BooCode</h1>
-            <p className="text-sm text-muted-foreground">
-              Pick a project from the sidebar.
-            </p>
-          </>
+    <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 ? (
+            <>
+              <h1 className="text-2xl font-semibold tracking-tight">No projects yet</h1>
+              <p className="text-sm text-muted-foreground">
+                Add a project from /opt or create a new one.
+              </p>
+            </>
+          ) : (
+            <>
+              <h1 className="text-2xl font-semibold tracking-tight">BooCode</h1>
+              <p className="text-sm text-muted-foreground">
+                Pick a project from the sidebar, or add another.
+              </p>
+            </>
+          )}
+          <div className="flex gap-2 justify-center pt-2">
+            <Button variant="outline" onClick={() => setAddOpen(true)}>Add existing project</Button>
+            <Button onClick={() => setCreateOpen(true)}>Create new project</Button>
+          </div>
+        </div>
+
+        {archived && archived.length > 0 && (
+          <div className="border-t pt-6">
+            <button
+              type="button"
+              onClick={() => setShowArchived(!showArchived)}
+              className="flex items-center gap-1 text-xs font-medium text-muted-foreground mb-2 hover:text-foreground"
+            >
+              {showArchived ? <ChevronDown size={12} /> : <ChevronRight size={12} />}
+              Archived Projects ({archived.length})
+            </button>
+            {showArchived && (
+              <ul className="divide-y rounded-md border">
+                {archived.map((p) => (
+                  <li key={p.id} className="flex items-center justify-between px-3 py-2 hover:bg-muted/50">
+                    <div className="flex-1 flex items-center gap-2 min-w-0">
+                      <Folder className="size-3.5 opacity-40 shrink-0" />
+                      <span className="truncate text-sm text-muted-foreground" title={p.name}>{p.name}</span>
+                    </div>
+                    <Button
+                      variant="ghost"
+                      size="icon-sm"
+                      aria-label="Restore project"
+                      title="Restore project"
+                      onClick={() => void handleUnarchive(p.id)}
+                    >
+                      <RotateCcw size={14} />
+                    </Button>
+                  </li>
+                ))}
+              </ul>
+            )}
+          </div>
         )}
       </div>
-      <AddProjectModal open={open} onOpenChange={setOpen} onAdded={() => {}} />
+      <AddProjectModal open={addOpen} onOpenChange={setAddOpen} onAdded={() => {}} />
+      <CreateProjectModal open={createOpen} onOpenChange={setCreateOpen} />
     </div>
   );
 }

apps/web/src/pages/Project.tsx

@@ -1,9 +1,9 @@
 import { useEffect, useState } from 'react';
 import { Link, useNavigate, useParams } from 'react-router-dom';
-import { Plus, MessageSquare, Trash2 } from 'lucide-react';
+import { Plus, MessageSquare, Trash2, ChevronDown, ChevronRight, RotateCcw } from 'lucide-react';
 import { toast } from 'sonner';
 import { api } from '@/api/client';
-import type { Project as ProjectType } from '@/api/types';
+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';
@@ -14,6 +14,8 @@ export function Project() {
   const { sessions, create, remove } = useSessions(id);
   const [project, setProject] = useState<ProjectType | null>(null);
   const [creating, setCreating] = useState(false);
+  const [archivedSessions, setArchivedSessions] = useState<Session[] | null>(null);
+  const [showArchived, setShowArchived] = useState(false);
 
   useEffect(() => {
     if (!id) return;
@@ -23,18 +25,55 @@ export function Project() {
       .catch(() => {});
   }, [id]);
 
+  useEffect(() => {
+    if (!id) return;
+    api.sessions.listForProject(id, 'archived')
+      .then(setArchivedSessions)
+      .catch(() => {});
+  }, [id]);
+
+  useEffect(() => {
+    return sessionEvents.subscribe((event) => {
+      if (event.type === 'session_archived' && event.project_id === id) {
+        setArchivedSessions((prev) => {
+          if (!prev) return prev;
+          if (prev.some((s) => s.id === event.session_id)) return prev;
+          const session = sessions?.find((s) => s.id === event.session_id);
+          if (!session) return prev;
+          return [{ ...session, status: 'archived' as const }, ...prev];
+        });
+      }
+      if (event.type === 'session_deleted' && event.project_id === id) {
+        setArchivedSessions((prev) =>
+          prev ? prev.filter((s) => s.id !== event.session_id) : prev
+        );
+      }
+    });
+  }, [id, sessions]);
+
   async function handleNew() {
     if (!id || creating) return;
     setCreating(true);
     try {
       const s = await create({});
-      sessionEvents.emit({ type: 'session_created', session: s, project_id: id });
+      // Server publishes session_created via WS; let useUserEvents deliver it.
       navigate(`/session/${s.id}`);
     } finally {
       setCreating(false);
     }
   }
 
+  async function handleUnarchive(sessionId: string) {
+    try {
+      await api.sessions.unarchive(sessionId);
+      setArchivedSessions((prev) =>
+        prev ? prev.filter((s) => s.id !== sessionId) : prev
+      );
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'failed to unarchive');
+    }
+  }
+
   return (
     <div className="flex-1 flex flex-col">
       <header className="border-b px-6 py-3 flex items-center justify-between">
@@ -52,7 +91,7 @@ export function Project() {
         </Button>
       </header>
 
-      <div className="flex-1 overflow-y-auto px-6 py-4">
+      <div className="flex-1 overflow-y-auto px-6 py-4 space-y-6">
         {sessions === null && (
           <div className="text-sm text-muted-foreground">Loading…</div>
         )}
@@ -79,11 +118,7 @@ export function Project() {
                   onClick={async () => {
                     try {
                       await remove(s.id);
-                      sessionEvents.emit({
-                        type: 'session_deleted',
-                        session_id: s.id,
-                        project_id: id!,
-                      });
+                      // Server publishes session_deleted via WS.
                     } catch (err) {
                       toast.error(
                         err instanceof Error ? err.message : 'failed to delete session'
@@ -97,6 +132,61 @@ export function Project() {
             ))}
           </ul>
         )}
+
+        {/* Archived sessions */}
+        {archivedSessions && archivedSessions.length > 0 && (
+          <div>
+            <button
+              type="button"
+              onClick={() => setShowArchived(!showArchived)}
+              className="flex items-center gap-1 text-xs font-medium text-muted-foreground mb-2 hover:text-foreground"
+            >
+              {showArchived ? <ChevronDown size={12} /> : <ChevronRight size={12} />}
+              Closed sessions ({archivedSessions.length})
+            </button>
+            {showArchived && (
+              <ul className="divide-y rounded-md border">
+                {archivedSessions.map((s) => (
+                  <li key={s.id} className="flex items-center justify-between px-3 py-2 hover:bg-muted/50">
+                    <div className="flex-1 flex items-center gap-2 min-w-0">
+                      <MessageSquare className="size-3.5 opacity-40 shrink-0" />
+                      <span className="truncate text-sm text-muted-foreground">{s.name}</span>
+                    </div>
+                    <div className="flex items-center gap-1">
+                      <Button
+                        variant="ghost"
+                        size="icon-sm"
+                        aria-label="Reopen session"
+                        onClick={() => void handleUnarchive(s.id)}
+                      >
+                        <RotateCcw size={14} />
+                      </Button>
+                      <Button
+                        variant="ghost"
+                        size="icon-sm"
+                        aria-label="Delete session permanently"
+                        onClick={async () => {
+                          try {
+                            await api.sessions.remove(s.id);
+                            setArchivedSessions((prev) =>
+                              prev ? prev.filter((a) => a.id !== s.id) : prev
+                            );
+                          } catch (err) {
+                            toast.error(
+                              err instanceof Error ? err.message : 'failed to delete'
+                            );
+                          }
+                        }}
+                      >
+                        <Trash2 />
+                      </Button>
+                    </div>
+                  </li>
+                ))}
+              </ul>
+            )}
+          </div>
+        )}
       </div>
     </div>
   );

apps/web/src/pages/Session.tsx

@@ -1,21 +1,26 @@
 import { useEffect, useState } from 'react';
-import { Link, useParams } from 'react-router-dom';
-import { ChevronLeft } from 'lucide-react';
+import { Link, useNavigate, useParams } from 'react-router-dom';
+import { ChevronRight } from 'lucide-react';
 import { api } from '@/api/client';
-import type { Session as SessionType } from '@/api/types';
+import type { Project, Session as SessionType } from '@/api/types';
 import { sessionEvents } from '@/hooks/sessionEvents';
+import { useActivePane } from '@/hooks/useActivePane';
 import { Workspace } from '@/components/Workspace';
 import { ModelPicker } from '@/components/ModelPicker';
 
 export function Session() {
   const { id } = useParams<{ id: string }>();
+  const navigate = useNavigate();
   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();
 
   useEffect(() => {
     if (!id) return;
     setSession(null);
+    setProject(null);
     let cancelled = false;
     api.sessions
       .get(id)
@@ -23,16 +28,17 @@ export function Session() {
         if (cancelled) return;
         setSession(s);
         setName(s.name);
-        // Emit unconditionally — the sidebar's session_loaded handler
-        // updates activeSession; redundant when the session is already in
-        // the recent_sessions cache but harmless. This lets the sidebar
-        // highlight the parent project for deep-linked sessions that
-        // aren't in the cache.
         sessionEvents.emit({
           type: 'session_loaded',
           session_id: id,
           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);
+          if (p) setProject(p);
+        }).catch(() => {});
       })
       .catch(() => {});
     return () => {
@@ -43,12 +49,19 @@ export function Session() {
   useEffect(() => {
     if (!id) return;
     return sessionEvents.subscribe((event) => {
-      if (event.type !== 'session_renamed') return;
-      if (event.session_id !== id) return;
-      setSession((prev) => (prev ? { ...prev, name: event.name } : prev));
-      setName((prev) => (editingName ? prev : event.name));
+      if (event.type === 'session_renamed' && event.session_id === id) {
+        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
+      ) {
+        navigate(`/project/${event.project_id}`);
+      }
     });
-  }, [id, editingName]);
+  }, [id, editingName, navigate]);
 
   async function saveName() {
     if (!id || !session) return;
@@ -60,26 +73,33 @@ export function Session() {
     }
     const updated = await api.sessions.update(id, { name: trimmed });
     setSession(updated);
-    sessionEvents.emit({
-      type: 'session_renamed',
-      session_id: id,
-      name: trimmed,
-    });
     setEditingName(false);
+    // Server publishes session_renamed via broker.publishUser; no local emit needed.
   }
 
+  // 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;
+
   return (
     <div className="flex-1 flex flex-col min-h-0">
-      <header className="border-b px-4 py-2 flex items-center gap-2 shrink-0">
-        {session && (
+      <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/${session.project_id}`}
-            className="text-muted-foreground hover:text-foreground"
-            aria-label="Back to project"
+            to={`/project/${project.id}`}
+            className="text-muted-foreground hover:text-foreground truncate max-w-[200px]"
+            title={project.name}
           >
-            <ChevronLeft className="size-4" />
+            {project.name}
           </Link>
+        ) : (
+          <span className="text-muted-foreground/60">…</span>
         )}
+        <ChevronRight className="size-3 text-muted-foreground/60" />
         {editingName ? (
           <input
             autoFocus
@@ -98,21 +118,35 @@ export function Session() {
         ) : (
           <button
             type="button"
-            className="text-sm font-medium hover:underline"
+            className="text-sm font-medium hover:underline truncate max-w-[280px]"
             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-[320px]"
+              title={active.activeFile}
+            >
+              {active.activeFile}
+            </span>
+          </>
+        )}
         <div className="ml-auto">
           {session && (
-            <ModelPicker
-              value={session.model}
-              onChange={async (model) => {
-                const updated = await api.sessions.update(session.id, { model });
-                setSession(updated);
-              }}
-            />
+            <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>

docker-compose.yml

@@ -9,7 +9,7 @@ services:
     environment:
       DATABASE_URL: postgres://boocode:${POSTGRES_PASSWORD}@boocode_db:5432/boocode
     volumes:
-      - /opt:/opt:ro
+      - /opt:/opt:rw
     depends_on:
       - boocode_db
     networks: