Add benchmark results and tests for LSP graph builder and staged search

- Introduced a new benchmark results file for performance comparison on 2026-02-09. - Added a test for LspGraphBuilder to ensure it does not expand nodes at maximum depth. - Created a test for the staged search pipeline to validate fallback behavior when stage 1 returns empty results.
2026-02-10 02:24:35 +08:00 · 2026-02-09 21:43:13 +08:00
parent 4344e79e68
commit 362f354f1c
25 changed files with 2613 additions and 51 deletions
--- a/ccw/frontend/src/components/issue/hub/IssueBoardPanel.tsx
+++ b/ccw/frontend/src/components/issue/hub/IssueBoardPanel.tsx
@@ -310,14 +310,14 @@ export function IssueBoardPanel() {
                  preferredShell: 'bash',
                  tool: autoStart.tool,
                  resumeKey: issueId,
-                });
+                }, projectPath);
                await executeInCliSession(created.session.sessionKey, {
                  tool: autoStart.tool,
                  prompt: buildIssueAutoPrompt({ ...issue, status: destStatus }),
                  mode: autoStart.mode,
                  resumeKey: issueId,
                  resumeStrategy: autoStart.resumeStrategy,
-                });
+                }, projectPath);
              } catch (e) {
                setOptimisticError(`Auto-start failed: ${e instanceof Error ? e.message : String(e)}`);
              }
@@ -328,7 +328,7 @@ export function IssueBoardPanel() {
        }
      }
    },
-    [issues, idsByStatus, updateIssue]
+    [autoStart, issues, idsByStatus, projectPath, updateIssue]
  );

  if (error) {
--- a/ccw/frontend/src/components/issue/hub/IssueTerminalTab.tsx
+++ b/ccw/frontend/src/components/issue/hub/IssueTerminalTab.tsx
@@ -5,7 +5,7 @@

 import { useEffect, useMemo, useRef, useState } from 'react';
 import { useIntl } from 'react-intl';
-import { Plus, RefreshCw, XCircle } from 'lucide-react';
+import { Copy, Plus, RefreshCw, Share2, XCircle } from 'lucide-react';
 import { Terminal as XTerm } from 'xterm';
 import { FitAddon } from 'xterm-addon-fit';
 import { Button } from '@/components/ui/Button';
@@ -16,6 +16,7 @@ import { useWorkflowStore, selectProjectPath } from '@/stores/workflowStore';
 import {
  closeCliSession,
  createCliSession,
+  createCliSessionShareToken,
  executeInCliSession,
  fetchCliSessionBuffer,
  fetchCliSessions,
@@ -53,6 +54,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
  const [resumeStrategy, setResumeStrategy] = useState<ResumeStrategy>('nativeResume');
  const [prompt, setPrompt] = useState('');
  const [isExecuting, setIsExecuting] = useState(false);
+  const [shareUrl, setShareUrl] = useState<string>('');

  const terminalHostRef = useRef<HTMLDivElement | null>(null);
  const xtermRef = useRef<XTerm | null>(null);
@@ -69,7 +71,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
    pendingInputRef.current = '';
    if (!pending) return;
    try {
-      await sendCliSessionText(sessionKey, { text: pending, appendNewline: false });
+      await sendCliSessionText(sessionKey, { text: pending, appendNewline: false }, projectPath || undefined);
    } catch (e) {
      // Ignore transient failures (WS output still shows process state)
    }
@@ -86,13 +88,13 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
  useEffect(() => {
    setIsLoadingSessions(true);
    setError(null);
-    fetchCliSessions()
+    fetchCliSessions(projectPath || undefined)
      .then((r) => {
        setSessions(r.sessions as unknown as CliSession[]);
      })
      .catch((e) => setError(e instanceof Error ? e.message : String(e)))
      .finally(() => setIsLoadingSessions(false));
-  }, [setSessions]);
+  }, [projectPath, setSessions]);

  // Auto-select a session if none selected yet
  useEffect(() => {
@@ -152,7 +154,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
    if (!selectedSessionKey) return;
    clearOutput(selectedSessionKey);

-    fetchCliSessionBuffer(selectedSessionKey)
+    fetchCliSessionBuffer(selectedSessionKey, projectPath || undefined)
      .then(({ buffer }) => {
        setBuffer(selectedSessionKey, buffer || '');
      })
@@ -162,7 +164,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
      .finally(() => {
        fitAddon.fit();
      });
-  }, [selectedSessionKey, setBuffer, clearOutput]);
+  }, [selectedSessionKey, projectPath, setBuffer, clearOutput]);

  // Stream new output chunks into xterm
  useEffect(() => {
@@ -192,7 +194,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
      if (selectedSessionKey) {
        void (async () => {
          try {
-            await resizeCliSession(selectedSessionKey, { cols: term.cols, rows: term.rows });
+            await resizeCliSession(selectedSessionKey, { cols: term.cols, rows: term.rows }, projectPath || undefined);
          } catch {
            // ignore
          }
@@ -203,7 +205,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
    const ro = new ResizeObserver(resize);
    ro.observe(host);
    return () => ro.disconnect();
-  }, [selectedSessionKey]);
+  }, [selectedSessionKey, projectPath]);

  const handleCreateSession = async () => {
    setIsCreating(true);
@@ -217,7 +219,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
        tool,
        model: undefined,
        resumeKey,
-      });
+      }, projectPath || undefined);
      upsertSession(created.session as unknown as CliSession);
      setSelectedSessionKey(created.session.sessionKey);
    } catch (e) {
@@ -232,7 +234,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
    setIsClosing(true);
    setError(null);
    try {
-      await closeCliSession(selectedSessionKey);
+      await closeCliSession(selectedSessionKey, projectPath || undefined);
      setSelectedSessionKey('');
    } catch (e) {
      setError(e instanceof Error ? e.message : String(e));
@@ -254,7 +256,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
        resumeKey: resumeKey.trim() || undefined,
        resumeStrategy,
        category: 'user',
-      });
+      }, projectPath || undefined);
      setPrompt('');
    } catch (e) {
      setError(e instanceof Error ? e.message : String(e));
@@ -267,7 +269,7 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
    setIsLoadingSessions(true);
    setError(null);
    try {
-      const r = await fetchCliSessions();
+      const r = await fetchCliSessions(projectPath || undefined);
      setSessions(r.sessions as unknown as CliSession[]);
    } catch (e) {
      setError(e instanceof Error ? e.message : String(e));
@@ -276,6 +278,31 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
    }
  };

+  const handleCreateShareLink = async () => {
+    if (!selectedSessionKey) return;
+    setError(null);
+    setShareUrl('');
+    try {
+      const r = await createCliSessionShareToken(selectedSessionKey, { mode: 'read' }, projectPath || undefined);
+      const url = new URL(window.location.href);
+      const base = (import.meta.env.BASE_URL ?? '/').replace(/\/$/, '');
+      url.pathname = `${base}/cli-sessions/share`;
+      url.search = `sessionKey=${encodeURIComponent(selectedSessionKey)}&shareToken=${encodeURIComponent(r.shareToken)}`;
+      setShareUrl(url.toString());
+    } catch (e) {
+      setError(e instanceof Error ? e.message : String(e));
+    }
+  };
+
+  const handleCopyShareLink = async () => {
+    if (!shareUrl) return;
+    try {
+      await navigator.clipboard.writeText(shareUrl);
+    } catch {
+      // ignore
+    }
+  };
+
  return (
    <div className="space-y-3">
      <div className="flex items-center gap-2 flex-wrap">
@@ -317,8 +344,23 @@ export function IssueTerminalTab({ issueId }: { issueId: string }) {
          <XCircle className="w-4 h-4 mr-2" />
          {formatMessage({ id: 'issues.terminal.session.close' })}
        </Button>
+
+        <Button variant="outline" onClick={handleCreateShareLink} disabled={!selectedSessionKey}>
+          <Share2 className="w-4 h-4 mr-2" />
+          {formatMessage({ id: 'issues.terminal.session.share' })}
+        </Button>
      </div>

+      {shareUrl && (
+        <div className="flex items-center gap-2">
+          <Input value={shareUrl} readOnly />
+          <Button variant="outline" onClick={handleCopyShareLink}>
+            <Copy className="w-4 h-4 mr-2" />
+            {formatMessage({ id: 'common.actions.copy' })}
+          </Button>
+        </div>
+      )}
+
      <div className="grid grid-cols-2 gap-2">
        <div className="space-y-1">
          <div className="text-xs text-muted-foreground">{formatMessage({ id: 'issues.terminal.exec.tool' })}</div>
--- a/ccw/frontend/src/components/issue/queue/QueueExecuteInSession.tsx
+++ b/ccw/frontend/src/components/issue/queue/QueueExecuteInSession.tsx
@@ -103,7 +103,7 @@ export function QueueExecuteInSession({ item, className }: { item: QueueItem; cl
    setIsLoading(true);
    setError(null);
    try {
-      const r = await fetchCliSessions();
+      const r = await fetchCliSessions(projectPath || undefined);
      setSessions(r.sessions as unknown as CliSession[]);
    } catch (e) {
      setError(e instanceof Error ? e.message : String(e));
@@ -115,7 +115,7 @@ export function QueueExecuteInSession({ item, className }: { item: QueueItem; cl
  useEffect(() => {
    void refreshSessions();
    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
+  }, [projectPath]);

  useEffect(() => {
    if (selectedSessionKey) return;
@@ -130,7 +130,7 @@ export function QueueExecuteInSession({ item, className }: { item: QueueItem; cl
      workingDir: projectPath,
      preferredShell: 'bash',
      resumeKey: item.issue_id,
-    });
+    }, projectPath);
    upsertSession(created.session as unknown as CliSession);
    setSelectedSessionKey(created.session.sessionKey);
    return created.session.sessionKey;
@@ -144,7 +144,7 @@ export function QueueExecuteInSession({ item, className }: { item: QueueItem; cl
        workingDir: projectPath,
        preferredShell: 'bash',
        resumeKey: item.issue_id,
-      });
+      }, projectPath);
      upsertSession(created.session as unknown as CliSession);
      setSelectedSessionKey(created.session.sessionKey);
      await refreshSessions();
@@ -168,7 +168,7 @@ export function QueueExecuteInSession({ item, className }: { item: QueueItem; cl
        category: 'user',
        resumeKey: item.issue_id,
        resumeStrategy,
-      });
+      }, projectPath);
      setLastExecution({ executionId: result.executionId, command: result.command });
    } catch (e) {
      setError(e instanceof Error ? e.message : String(e));
--- a/ccw/frontend/src/lib/api.ts
+++ b/ccw/frontend/src/lib/api.ts
@@ -5707,28 +5707,41 @@ export interface CreateCliSessionInput {
  resumeKey?: string;
 }

-export async function fetchCliSessions(): Promise<{ sessions: CliSession[] }> {
-  return fetchApi<{ sessions: CliSession[] }>('/api/cli-sessions');
+function withPath(url: string, projectPath?: string): string {
+  if (!projectPath) return url;
+  const sep = url.includes('?') ? '&' : '?';
+  return `${url}${sep}path=${encodeURIComponent(projectPath)}`;
 }

-export async function createCliSession(input: CreateCliSessionInput): Promise<{ success: boolean; session: CliSession }> {
-  return fetchApi<{ success: boolean; session: CliSession }>('/api/cli-sessions', {
+export async function fetchCliSessions(projectPath?: string): Promise<{ sessions: CliSession[] }> {
+  return fetchApi<{ sessions: CliSession[] }>(withPath('/api/cli-sessions', projectPath));
+}
+
+export async function createCliSession(
+  input: CreateCliSessionInput,
+  projectPath?: string
+): Promise<{ success: boolean; session: CliSession }> {
+  return fetchApi<{ success: boolean; session: CliSession }>(withPath('/api/cli-sessions', projectPath), {
    method: 'POST',
    body: JSON.stringify(input),
  });
 }

-export async function fetchCliSessionBuffer(sessionKey: string): Promise<{ session: CliSession; buffer: string }> {
+export async function fetchCliSessionBuffer(
+  sessionKey: string,
+  projectPath?: string
+): Promise<{ session: CliSession; buffer: string }> {
  return fetchApi<{ session: CliSession; buffer: string }>(
-    `/api/cli-sessions/${encodeURIComponent(sessionKey)}/buffer`
+    withPath(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/buffer`, projectPath)
  );
 }

 export async function sendCliSessionText(
  sessionKey: string,
-  input: { text: string; appendNewline?: boolean }
+  input: { text: string; appendNewline?: boolean },
+  projectPath?: string
 ): Promise<{ success: boolean }> {
-  return fetchApi<{ success: boolean }>(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/send`, {
+  return fetchApi<{ success: boolean }>(withPath(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/send`, projectPath), {
    method: 'POST',
    body: JSON.stringify(input),
  });
@@ -5747,27 +5760,40 @@ export interface ExecuteInCliSessionInput {

 export async function executeInCliSession(
  sessionKey: string,
-  input: ExecuteInCliSessionInput
+  input: ExecuteInCliSessionInput,
+  projectPath?: string
 ): Promise<{ success: boolean; executionId: string; command: string }> {
  return fetchApi<{ success: boolean; executionId: string; command: string }>(
-    `/api/cli-sessions/${encodeURIComponent(sessionKey)}/execute`,
+    withPath(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/execute`, projectPath),
    { method: 'POST', body: JSON.stringify(input) }
  );
 }

 export async function resizeCliSession(
  sessionKey: string,
-  input: { cols: number; rows: number }
+  input: { cols: number; rows: number },
+  projectPath?: string
 ): Promise<{ success: boolean }> {
-  return fetchApi<{ success: boolean }>(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/resize`, {
+  return fetchApi<{ success: boolean }>(withPath(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/resize`, projectPath), {
    method: 'POST',
    body: JSON.stringify(input),
  });
 }

-export async function closeCliSession(sessionKey: string): Promise<{ success: boolean }> {
-  return fetchApi<{ success: boolean }>(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/close`, {
+export async function closeCliSession(sessionKey: string, projectPath?: string): Promise<{ success: boolean }> {
+  return fetchApi<{ success: boolean }>(withPath(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/close`, projectPath), {
    method: 'POST',
    body: JSON.stringify({}),
  });
 }
+
+export async function createCliSessionShareToken(
+  sessionKey: string,
+  input: { mode?: 'read' | 'write'; ttlMs?: number },
+  projectPath?: string
+): Promise<{ success: boolean; shareToken: string; expiresAt: string; mode: 'read' | 'write' }> {
+  return fetchApi<{ success: boolean; shareToken: string; expiresAt: string; mode: 'read' | 'write' }>(
+    withPath(`/api/cli-sessions/${encodeURIComponent(sessionKey)}/share`, projectPath),
+    { method: 'POST', body: JSON.stringify(input) }
+  );
+}
--- a/ccw/frontend/src/locales/en/issues.json
+++ b/ccw/frontend/src/locales/en/issues.json
@@ -119,7 +119,8 @@
      "none": "No sessions",
      "refresh": "Refresh",
      "new": "New Session",
-      "close": "Close"
+      "close": "Close",
+      "share": "Share (Read-only)"
    },
    "exec": {
      "tool": "Tool",
--- a/ccw/frontend/src/locales/zh/issues.json
+++ b/ccw/frontend/src/locales/zh/issues.json
@@ -119,7 +119,8 @@
      "none": "暂无会话",
      "refresh": "刷新",
      "new": "新建会话",
-      "close": "关闭"
+      "close": "关闭",
+      "share": "分享（只读）"
    },
    "exec": {
      "tool": "工具",
--- a/ccw/src/core/routes/cli-sessions-routes.ts
+++ b/ccw/src/core/routes/cli-sessions-routes.ts
@@ -14,10 +14,52 @@

 import type { RouteContext } from './types.js';
 import { getCliSessionManager } from '../services/cli-session-manager.js';
+import path from 'path';
+import { getCliSessionPolicy } from '../services/cli-session-policy.js';
+import { RateLimiter } from '../services/rate-limiter.js';
+import { appendCliSessionAudit } from '../services/cli-session-audit.js';
+import { describeShareAuthFailure, getCliSessionShareManager } from '../services/cli-session-share.js';
+
+function clientKey(req: RouteContext['req']): string {
+  const addr = req.socket?.remoteAddress ?? 'unknown';
+  const ua = Array.isArray(req.headers['user-agent']) ? req.headers['user-agent'][0] : req.headers['user-agent'];
+  return `${addr}|${ua ?? ''}`;
+}
+
+function clientInfo(req: RouteContext['req']): { ip?: string; userAgent?: string } {
+  const ip = req.socket?.remoteAddress ?? undefined;
+  const userAgent = Array.isArray(req.headers['user-agent']) ? req.headers['user-agent'][0] : req.headers['user-agent'];
+  return { ip: ip || undefined, userAgent: userAgent || undefined };
+}
+
+function resolveProjectRoot(ctx: RouteContext): string {
+  const forced = (ctx.req as any).__cliSessionShareProjectRoot;
+  if (typeof forced === 'string' && forced.trim()) return path.resolve(forced);
+  const raw = ctx.url.searchParams.get('path');
+  if (raw && raw.trim()) return path.resolve(raw);
+  return path.resolve(ctx.initialPath || process.cwd());
+}
+
+function validateWorkingDir(projectRoot: string, workingDir: string, allowOutside: boolean): string | null {
+  const resolved = path.resolve(workingDir);
+  if (allowOutside) return null;
+
+  const rel = path.relative(projectRoot, resolved);
+  const isInside = rel === '' || (!rel.startsWith('..') && !path.isAbsolute(rel));
+  return isInside ? null : `workingDir must be within project: ${projectRoot}`;
+}
+
+const policy = getCliSessionPolicy();
+const createLimiter = new RateLimiter({ limit: policy.rateLimit.createPerMinute, windowMs: 60_000 });
+const executeLimiter = new RateLimiter({ limit: policy.rateLimit.executePerMinute, windowMs: 60_000 });
+const resizeLimiter = new RateLimiter({ limit: policy.rateLimit.resizePerMinute, windowMs: 60_000 });
+const sendBytesLimiter = new RateLimiter({ limit: policy.rateLimit.sendBytesPerMinute, windowMs: 60_000 });
+const shareManager = getCliSessionShareManager();

 export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolean> {
  const { pathname, req, res, handlePostRequest, initialPath } = ctx;
-  const manager = getCliSessionManager(process.cwd());
+  const projectRoot = resolveProjectRoot(ctx);
+  const manager = getCliSessionManager(projectRoot);

  // GET /api/cli-sessions
  if (pathname === '/api/cli-sessions' && req.method === 'GET') {
@@ -29,6 +71,15 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
  // POST /api/cli-sessions
  if (pathname === '/api/cli-sessions' && req.method === 'POST') {
    handlePostRequest(req, res, async (body: unknown) => {
+      const rate = createLimiter.consume(clientKey(req), 1);
+      if (!rate.ok) {
+        return { error: 'Rate limited', status: 429 };
+      }
+
+      if (policy.maxSessions > 0 && manager.listSessions().length >= policy.maxSessions) {
+        return { error: `Too many sessions (max ${policy.maxSessions})`, status: 429 };
+      }
+
      const {
        workingDir,
        cols,
@@ -39,16 +90,41 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
        resumeKey
      } = (body || {}) as any;

+      if (tool && typeof tool === 'string') {
+        const normalizedTool = tool.trim();
+        if (!policy.allowedTools.includes(normalizedTool)) {
+          return { error: `Tool not allowed: ${normalizedTool}`, status: 400 };
+        }
+      }
+
+      const desiredWorkingDir = workingDir || initialPath;
+      if (typeof desiredWorkingDir !== 'string' || !desiredWorkingDir.trim()) {
+        return { error: 'workingDir is required', status: 400 };
+      }
+      const wdError = validateWorkingDir(projectRoot, desiredWorkingDir, policy.allowWorkingDirOutsideProject);
+      if (wdError) return { error: wdError, status: 400 };
+
      const session = manager.createSession({
-        workingDir: workingDir || initialPath,
+        workingDir: desiredWorkingDir,
        cols: typeof cols === 'number' ? cols : undefined,
        rows: typeof rows === 'number' ? rows : undefined,
        preferredShell: preferredShell === 'pwsh' ? 'pwsh' : 'bash',
-        tool,
+        tool: typeof tool === 'string' ? tool.trim() : undefined,
        model,
        resumeKey
      });

+      appendCliSessionAudit({
+        type: 'session_created',
+        timestamp: new Date().toISOString(),
+        projectRoot,
+        sessionKey: session.sessionKey,
+        tool: session.tool,
+        resumeKey: session.resumeKey,
+        workingDir: session.workingDir,
+        ...clientInfo(req),
+      });
+
      return { success: true, session };
    });
    return true;
@@ -58,6 +134,17 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
  const bufferMatch = pathname.match(/^\/api\/cli-sessions\/([^/]+)\/buffer$/);
  if (bufferMatch && req.method === 'GET') {
    const sessionKey = decodeURIComponent(bufferMatch[1]);
+
+    const shareToken = ctx.url.searchParams.get('shareToken');
+    if (shareToken) {
+      const validated = shareManager.validateToken(shareToken, sessionKey);
+      if (!validated || (validated.mode !== 'read' && validated.mode !== 'write')) {
+        res.writeHead(403, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error: describeShareAuthFailure().error }));
+        return true;
+      }
+    }
+
    const session = manager.getSession(sessionKey);
    if (!session) {
      res.writeHead(404, { 'Content-Type': 'application/json' });
@@ -69,6 +156,59 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
    return true;
  }

+  // GET /api/cli-sessions/:sessionKey/stream (SSE)
+  const streamMatch = pathname.match(/^\/api\/cli-sessions\/([^/]+)\/stream$/);
+  if (streamMatch && req.method === 'GET') {
+    const sessionKey = decodeURIComponent(streamMatch[1]);
+    const shareToken = ctx.url.searchParams.get('shareToken');
+    if (!shareToken) {
+      res.writeHead(403, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify({ error: 'shareToken is required' }));
+      return true;
+    }
+    const validated = shareManager.validateToken(shareToken, sessionKey);
+    if (!validated || (validated.mode !== 'read' && validated.mode !== 'write')) {
+      res.writeHead(403, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify({ error: describeShareAuthFailure().error }));
+      return true;
+    }
+
+    const session = manager.getSession(sessionKey);
+    if (!session) {
+      res.writeHead(404, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify({ error: 'Session not found' }));
+      return true;
+    }
+
+    res.writeHead(200, {
+      'Content-Type': 'text/event-stream; charset=utf-8',
+      'Cache-Control': 'no-cache, no-transform',
+      Connection: 'keep-alive',
+    });
+
+    const includeBuffer = ctx.url.searchParams.get('includeBuffer') !== '0';
+    if (includeBuffer) {
+      const buffer = manager.getBuffer(sessionKey);
+      res.write(`event: buffer\ndata: ${JSON.stringify({ sessionKey, buffer })}\n\n`);
+    }
+
+    const unsubscribe = manager.onOutput((event) => {
+      if (event.sessionKey !== sessionKey) return;
+      res.write(`event: output\ndata: ${JSON.stringify(event)}\n\n`);
+    });
+
+    req.on('close', () => {
+      unsubscribe();
+      try {
+        res.end();
+      } catch {
+        // ignore
+      }
+    });
+
+    return true;
+  }
+
  // POST /api/cli-sessions/:sessionKey/send
  const sendMatch = pathname.match(/^\/api\/cli-sessions\/([^/]+)\/send$/);
  if (sendMatch && req.method === 'POST') {
@@ -78,17 +218,69 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
      if (typeof text !== 'string') {
        return { error: 'text is required', status: 400 };
      }
+
+      const cost = Buffer.byteLength(text, 'utf8');
+      const rate = sendBytesLimiter.consume(clientKey(req), cost);
+      if (!rate.ok) {
+        return { error: 'Rate limited', status: 429 };
+      }
+
      manager.sendText(sessionKey, text, appendNewline !== false);
+      appendCliSessionAudit({
+        type: 'session_send',
+        timestamp: new Date().toISOString(),
+        projectRoot,
+        sessionKey,
+        ...clientInfo(req),
+        details: { bytes: cost, appendNewline: appendNewline !== false },
+      });
      return { success: true };
    });
    return true;
  }

+  // POST /api/cli-sessions/:sessionKey/share
+  const shareMatch = pathname.match(/^\/api\/cli-sessions\/([^/]+)\/share$/);
+  if (shareMatch && req.method === 'POST') {
+    const sessionKey = decodeURIComponent(shareMatch[1]);
+    handlePostRequest(req, res, async (body: unknown) => {
+      const { mode, ttlMs } = (body || {}) as any;
+      const session = manager.getSession(sessionKey);
+      if (!session) return { error: 'Session not found', status: 404 };
+
+      const shareMode = mode === 'write' ? 'write' : 'read';
+      const safeTtlMs = typeof ttlMs === 'number' ? Math.min(Math.max(60_000, ttlMs), 7 * 24 * 60 * 60_000) : undefined;
+      const token = shareManager.createToken({
+        sessionKey,
+        projectRoot,
+        mode: shareMode,
+        ttlMs: safeTtlMs,
+      });
+
+      appendCliSessionAudit({
+        type: 'session_share_created',
+        timestamp: new Date().toISOString(),
+        projectRoot,
+        sessionKey,
+        ...clientInfo(req),
+        details: { shareMode, expiresAt: token.expiresAt },
+      });
+
+      return { success: true, shareToken: token.token, expiresAt: token.expiresAt, mode: token.mode };
+    });
+    return true;
+  }
+
  // POST /api/cli-sessions/:sessionKey/execute
  const executeMatch = pathname.match(/^\/api\/cli-sessions\/([^/]+)\/execute$/);
  if (executeMatch && req.method === 'POST') {
    const sessionKey = decodeURIComponent(executeMatch[1]);
    handlePostRequest(req, res, async (body: unknown) => {
+      const rate = executeLimiter.consume(clientKey(req), 1);
+      if (!rate.ok) {
+        return { error: 'Rate limited', status: 429 };
+      }
+
      const {
        tool,
        prompt,
@@ -106,9 +298,18 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
      if (!prompt || typeof prompt !== 'string') {
        return { error: 'prompt is required', status: 400 };
      }
+      const normalizedTool = tool.trim();
+      if (!policy.allowedTools.includes(normalizedTool)) {
+        return { error: `Tool not allowed: ${normalizedTool}`, status: 400 };
+      }
+
+      if (workingDir && typeof workingDir === 'string') {
+        const wdError = validateWorkingDir(projectRoot, workingDir, policy.allowWorkingDirOutsideProject);
+        if (wdError) return { error: wdError, status: 400 };
+      }

      const result = manager.execute(sessionKey, {
-        tool,
+        tool: normalizedTool,
        prompt,
        mode,
        model,
@@ -118,6 +319,18 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
        resumeStrategy: resumeStrategy === 'promptConcat' ? 'promptConcat' : 'nativeResume'
      });

+      appendCliSessionAudit({
+        type: 'session_execute',
+        timestamp: new Date().toISOString(),
+        projectRoot,
+        sessionKey,
+        tool: normalizedTool,
+        resumeKey: typeof resumeKey === 'string' ? resumeKey : undefined,
+        workingDir: typeof workingDir === 'string' ? workingDir : undefined,
+        ...clientInfo(req),
+        details: { executionId: result.executionId, mode, category, resumeStrategy },
+      });
+
      return { success: true, ...result };
    });
    return true;
@@ -128,11 +341,23 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
  if (resizeMatch && req.method === 'POST') {
    const sessionKey = decodeURIComponent(resizeMatch[1]);
    handlePostRequest(req, res, async (body: unknown) => {
+      const rate = resizeLimiter.consume(clientKey(req), 1);
+      if (!rate.ok) {
+        return { error: 'Rate limited', status: 429 };
+      }
      const { cols, rows } = (body || {}) as any;
      if (typeof cols !== 'number' || typeof rows !== 'number') {
        return { error: 'cols and rows are required', status: 400 };
      }
      manager.resize(sessionKey, cols, rows);
+      appendCliSessionAudit({
+        type: 'session_resize',
+        timestamp: new Date().toISOString(),
+        projectRoot,
+        sessionKey,
+        ...clientInfo(req),
+        details: { cols, rows },
+      });
      return { success: true };
    });
    return true;
@@ -143,6 +368,13 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea
  if (closeMatch && req.method === 'POST') {
    const sessionKey = decodeURIComponent(closeMatch[1]);
    manager.close(sessionKey);
+    appendCliSessionAudit({
+      type: 'session_closed',
+      timestamp: new Date().toISOString(),
+      projectRoot,
+      sessionKey,
+      ...clientInfo(req),
+    });
    res.writeHead(200, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify({ success: true }));
    return true;
@@ -150,4 +382,3 @@ export async function handleCliSessionsRoutes(ctx: RouteContext): Promise<boolea

  return false;
 }
-
--- a/ccw/src/core/server.ts
+++ b/ccw/src/core/server.ts
@@ -53,6 +53,7 @@ import { randomBytes } from 'crypto';

 // Import health check service
 import { getHealthCheckService } from './services/health-check-service.js';
+import { getCliSessionShareManager } from './services/cli-session-share.js';

 // Import status check functions for warmup
 import { checkSemanticStatus, checkVenvStatus } from '../tools/codex-lens.js';
@@ -465,6 +466,7 @@ export async function startServer(options: ServerOptions = {}): Promise<http.Ser
  const secretKey = tokenManager.getSecretKey();
  tokenManager.getOrCreateAuthToken();
  const unauthenticatedPaths = new Set<string>(['/api/auth/token', '/api/csrf-token', '/api/hook', '/api/test/ask-question', '/api/a2ui/answer']);
+  const cliSessionShareManager = getCliSessionShareManager();

  const server = http.createServer(async (req, res) => {
    const url = new URL(req.url ?? '/', `http://localhost:${serverPort}`);
@@ -521,8 +523,24 @@ export async function startServer(options: ServerOptions = {}): Promise<http.Ser

      // Authentication middleware for all API routes
      if (pathname.startsWith('/api/')) {
-        const ok = authMiddleware({ pathname, req, res, tokenManager, secretKey, unauthenticatedPaths });
-        if (!ok) return;
+        let shareBypass = false;
+        const shareToken = url.searchParams.get('shareToken');
+        if (shareToken) {
+          const match = pathname.match(/^\/api\/cli-sessions\/([^/]+)\/(buffer|stream)$/);
+          if (match?.[1]) {
+            const sessionKey = decodeURIComponent(match[1]);
+            const validated = cliSessionShareManager.validateToken(shareToken, sessionKey);
+            if (validated && (validated.mode === 'read' || validated.mode === 'write')) {
+              (req as any).__cliSessionShareProjectRoot = validated.projectRoot;
+              shareBypass = true;
+            }
+          }
+        }
+
+        if (!shareBypass) {
+          const ok = authMiddleware({ pathname, req, res, tokenManager, secretKey, unauthenticatedPaths });
+          if (!ok) return;
+        }
      }

      // CSRF validation middleware for state-changing API routes
--- a/ccw/src/core/services/cli-session-audit.ts
+++ b/ccw/src/core/services/cli-session-audit.ts
@@ -0,0 +1,39 @@
+import { existsSync, mkdirSync, appendFileSync } from 'fs';
+import path from 'path';
+
+export type CliSessionAuditEventType =
+  | 'session_created'
+  | 'session_closed'
+  | 'session_send'
+  | 'session_execute'
+  | 'session_resize'
+  | 'session_share_created'
+  | 'session_idle_reaped';
+
+export interface CliSessionAuditEvent {
+  type: CliSessionAuditEventType;
+  timestamp: string;
+  projectRoot: string;
+  sessionKey?: string;
+  tool?: string;
+  resumeKey?: string;
+  workingDir?: string;
+  ip?: string;
+  userAgent?: string;
+  details?: Record<string, unknown>;
+}
+
+function auditFilePath(projectRoot: string): string {
+  return path.join(projectRoot, '.workflow', 'audit', 'cli-sessions.jsonl');
+}
+
+export function appendCliSessionAudit(event: CliSessionAuditEvent): void {
+  try {
+    const filePath = auditFilePath(event.projectRoot);
+    const dir = path.dirname(filePath);
+    if (!existsSync(dir)) mkdirSync(dir, { recursive: true });
+    appendFileSync(filePath, JSON.stringify(event) + '\n', { encoding: 'utf8' });
+  } catch {
+    // Best-effort: never fail API requests due to audit write errors.
+  }
+}
--- a/ccw/src/core/services/cli-session-manager.ts
+++ b/ccw/src/core/services/cli-session-manager.ts
@@ -12,6 +12,7 @@ import {
  type CliSessionResumeStrategy
 } from './cli-session-command-builder.js';
 import { getCliSessionPolicy } from './cli-session-policy.js';
+import { appendCliSessionAudit } from './cli-session-audit.js';

 export interface CliSession {
  sessionKey: string;
@@ -147,10 +148,29 @@ export class CliSessionManager {
  private projectRoot: string;
  private emitter = new EventEmitter();
  private maxBufferBytes: number;
+  private idleTimeoutMs: number;
+  private reaperTimer: NodeJS.Timeout | null = null;

  constructor(projectRoot: string) {
    this.projectRoot = projectRoot;
-    this.maxBufferBytes = getCliSessionPolicy().maxBufferBytes;
+    const policy = getCliSessionPolicy();
+    this.maxBufferBytes = policy.maxBufferBytes;
+    this.idleTimeoutMs = policy.idleTimeoutMs;
+
+    if (this.idleTimeoutMs > 0) {
+      this.reaperTimer = setInterval(() => {
+        const reaped = this.closeIdleSessions(this.idleTimeoutMs);
+        for (const sessionKey of reaped) {
+          appendCliSessionAudit({
+            type: 'session_idle_reaped',
+            timestamp: nowIso(),
+            projectRoot: this.projectRoot,
+            sessionKey,
+          });
+        }
+      }, 60_000);
+      this.reaperTimer.unref?.();
+    }
  }

  listSessions(): CliSession[] {
@@ -354,14 +374,14 @@ export class CliSessionManager {
    return () => this.emitter.off('output', handler);
  }

-  closeIdleSessions(idleTimeoutMs: number): number {
-    if (idleTimeoutMs <= 0) return 0;
+  closeIdleSessions(idleTimeoutMs: number): string[] {
+    if (idleTimeoutMs <= 0) return [];
    const now = Date.now();
-    let closed = 0;
+    const closed: string[] = [];
    for (const s of this.sessions.values()) {
      if (now - s.lastActivityAt >= idleTimeoutMs) {
        this.close(s.sessionKey);
-        closed += 1;
+        closed.push(s.sessionKey);
      }
    }
    return closed;
--- a/ccw/src/core/services/cli-session-share.ts
+++ b/ccw/src/core/services/cli-session-share.ts
@@ -0,0 +1,83 @@
+import { randomBytes } from 'crypto';
+
+export type CliSessionShareMode = 'read' | 'write';
+
+export interface CliSessionShareTokenRecord {
+  token: string;
+  sessionKey: string;
+  projectRoot: string;
+  mode: CliSessionShareMode;
+  expiresAt: string;
+}
+
+interface InternalTokenRecord extends CliSessionShareTokenRecord {
+  expiresAtMs: number;
+}
+
+function createTokenValue(): string {
+  // 32 bytes => 43 chars base64url (approx), safe for URLs.
+  return randomBytes(32).toString('base64url');
+}
+
+export class CliSessionShareManager {
+  private tokens = new Map<string, InternalTokenRecord>();
+
+  createToken(input: {
+    sessionKey: string;
+    projectRoot: string;
+    mode: CliSessionShareMode;
+    ttlMs?: number;
+  }): CliSessionShareTokenRecord {
+    const ttlMs = typeof input.ttlMs === 'number' ? Math.max(1_000, input.ttlMs) : 24 * 60 * 60_000;
+    const expiresAtMs = Date.now() + ttlMs;
+    const record: InternalTokenRecord = {
+      token: createTokenValue(),
+      sessionKey: input.sessionKey,
+      projectRoot: input.projectRoot,
+      mode: input.mode,
+      expiresAt: new Date(expiresAtMs).toISOString(),
+      expiresAtMs,
+    };
+    this.tokens.set(record.token, record);
+    return record;
+  }
+
+  validateToken(token: string, sessionKey: string): CliSessionShareTokenRecord | null {
+    const record = this.tokens.get(token);
+    if (!record) return null;
+    if (record.sessionKey !== sessionKey) return null;
+    if (Date.now() >= record.expiresAtMs) {
+      this.tokens.delete(token);
+      return null;
+    }
+    const { expiresAtMs: _expiresAtMs, ...publicRecord } = record;
+    return publicRecord;
+  }
+
+  revokeToken(token: string): boolean {
+    return this.tokens.delete(token);
+  }
+
+  cleanupExpired(): number {
+    const now = Date.now();
+    let removed = 0;
+    for (const [token, record] of this.tokens) {
+      if (now >= record.expiresAtMs) {
+        this.tokens.delete(token);
+        removed += 1;
+      }
+    }
+    return removed;
+  }
+}
+
+let singleton: CliSessionShareManager | null = null;
+
+export function getCliSessionShareManager(): CliSessionShareManager {
+  if (!singleton) singleton = new CliSessionShareManager();
+  return singleton;
+}
+
+export function describeShareAuthFailure(): { error: string; status: number } {
+  return { error: 'Invalid or expired share token', status: 403 };
+}
--- a/ccw/src/core/services/flow-executor.ts
+++ b/ccw/src/core/services/flow-executor.ts
@@ -255,7 +255,7 @@ export class NodeRunner {
          };
        }

-        const manager = getCliSessionManager(process.cwd());
+        const manager = getCliSessionManager(this.context.workingDir || process.cwd());
        const routed = manager.execute(targetSessionKey, {
          tool,
          prompt: instruction,
--- a/ccw/src/mcp-server/index.ts
+++ b/ccw/src/mcp-server/index.ts
@@ -22,7 +22,7 @@ const ENV_PROJECT_ROOT = 'CCW_PROJECT_ROOT';
 const ENV_ALLOWED_DIRS = 'CCW_ALLOWED_DIRS';

 // Default enabled tools (core set - file operations, core memory, and smart search)
-const DEFAULT_TOOLS: string[] = ['write_file', 'edit_file', 'read_file', 'read_many_files', 'core_memory', 'smart_search'];
+const DEFAULT_TOOLS: string[] = ['write_file', 'edit_file', 'read_file', 'read_many_files', 'read_outline', 'core_memory', 'smart_search'];

 /**
 * Get list of enabled tools from environment or defaults
--- a/ccw/src/tools/index.ts
+++ b/ccw/src/tools/index.ts
@@ -24,6 +24,7 @@ import * as codexLensLspMod from './codex-lens-lsp.js';
 import * as vscodeLspMod from './vscode-lsp.js';
 import * as readFileMod from './read-file.js';
 import * as readManyFilesMod from './read-many-files.js';
+import * as readOutlineMod from './read-outline.js';
 import * as coreMemoryMod from './core-memory.js';
 import * as contextCacheMod from './context-cache.js';
 import * as skillContextLoaderMod from './skill-context-loader.js';
@@ -367,6 +368,7 @@ registerTool(toLegacyTool(codexLensLspMod));
 registerTool(toLegacyTool(vscodeLspMod));
 registerTool(toLegacyTool(readFileMod));
 registerTool(toLegacyTool(readManyFilesMod));
+registerTool(toLegacyTool(readOutlineMod));
 registerTool(toLegacyTool(coreMemoryMod));
 registerTool(toLegacyTool(contextCacheMod));
 registerTool(toLegacyTool(skillContextLoaderMod));
--- a/ccw/src/tools/read-outline.ts
+++ b/ccw/src/tools/read-outline.ts
@@ -0,0 +1,104 @@
+/**
+ * Read Outline Tool - Parse code files into structured symbol outlines.
+ *
+ * Uses web-tree-sitter for AST-level parsing. Returns function/class/method
+ * signatures with line offsets directly usable by read_file(offset, limit).
+ *
+ * Supported: TypeScript, TSX, JavaScript, Python, Go, Rust, Java, C#, C, C++
+ */
+
+import { z } from 'zod';
+import type { ToolSchema, ToolResult } from '../types/tool.js';
+import { existsSync, statSync, readFileSync } from 'fs';
+import { relative } from 'path';
+import { validatePath, getProjectRoot } from '../utils/path-validator.js';
+import { BINARY_EXTENSIONS } from '../utils/file-reader.js';
+import { detectLanguage } from '../utils/outline-queries.js';
+import { parseOutline } from '../utils/outline-parser.js';
+import type { OutlineResult } from '../utils/outline-parser.js';
+import { extname } from 'path';
+
+const ParamsSchema = z.object({
+  path: z.string().describe('File path to parse for outline'),
+  language: z.string().optional().describe('Language hint (e.g. "typescript", "python"). Auto-detected from extension if omitted.'),
+});
+
+type Params = z.infer<typeof ParamsSchema>;
+
+export const schema: ToolSchema = {
+  name: 'read_outline',
+  description: `Parse a code file into a structured outline of symbols (functions, classes, methods, interfaces, types, enums).
+
+Returns symbol names, signatures, docstrings, and 0-based line offsets that work directly with read_file(offset, limit).
+
+Usage:
+  read_outline(path="src/server.ts")
+  read_outline(path="main.py", language="python")
+
+Workflow: discover symbols → use line/endLine with read_file to jump to implementations.
+
+Supported languages: TypeScript, TSX, JavaScript, Python, Go, Rust, Java, C#, C, C++`,
+  inputSchema: {
+    type: 'object',
+    properties: {
+      path: { type: 'string', description: 'File path to parse for outline' },
+      language: { type: 'string', description: 'Language hint (e.g. "typescript", "python"). Auto-detected from extension if omitted.' },
+    },
+    required: ['path'],
+  },
+};
+
+export async function handler(params: Record<string, unknown>): Promise<ToolResult<OutlineResult>> {
+  const parsed = ParamsSchema.safeParse(params);
+  if (!parsed.success) {
+    return { success: false, error: `Invalid params: ${parsed.error.message}` };
+  }
+
+  const { path: filePath, language: langHint } = parsed.data;
+  const cwd = getProjectRoot();
+  const resolvedPath = await validatePath(filePath);
+
+  if (!existsSync(resolvedPath)) {
+    return { success: false, error: `File not found: ${filePath}` };
+  }
+
+  const stat = statSync(resolvedPath);
+  if (!stat.isFile()) {
+    return { success: false, error: `Not a file: ${filePath}` };
+  }
+
+  // Check for binary files
+  const ext = extname(resolvedPath).toLowerCase();
+  if (BINARY_EXTENSIONS.has(ext)) {
+    return { success: false, error: `Binary file not supported: ${filePath}` };
+  }
+
+  // Detect language
+  const config = detectLanguage(resolvedPath, langHint);
+  if (!config) {
+    const supported = 'TypeScript, TSX, JavaScript, Python, Go, Rust, Java, C#, C, C++';
+    return {
+      success: false,
+      error: `Unsupported language for "${ext}" extension. Supported: ${supported}`,
+    };
+  }
+
+  // Read file content
+  const content = readFileSync(resolvedPath, 'utf-8');
+
+  // Parse outline
+  try {
+    const result = await parseOutline(
+      relative(cwd, resolvedPath) || filePath,
+      content,
+      config
+    );
+
+    return { success: true, result };
+  } catch (err) {
+    return {
+      success: false,
+      error: `Outline parsing failed: ${(err as Error).message}`,
+    };
+  }
+}
--- a/ccw/src/utils/outline-parser.ts
+++ b/ccw/src/utils/outline-parser.ts
@@ -0,0 +1,340 @@
+/**
+ * Core AST outline parsing engine using web-tree-sitter.
+ *
+ * Parses source files into structured symbol outlines (functions, classes, methods, etc.)
+ * with line offsets compatible with read_file(offset, limit).
+ */
+
+import { createRequire } from 'node:module';
+import { dirname, join } from 'path';
+import Parser from 'web-tree-sitter';
+import type { LanguageConfig } from './outline-queries.js';
+
+export interface OutlineSymbol {
+  kind: 'function' | 'class' | 'method' | 'interface' | 'type' | 'enum' | 'property';
+  name: string;
+  line: number;       // 0-based, compatible with read_file offset
+  endLine: number;    // 0-based
+  doc: string | null;
+  signature: string;  // truncated to 200 chars
+  parent: string | null;
+  children: number;   // nested method/property count (class/interface)
+}
+
+export interface OutlineResult {
+  file: string;
+  language: string;
+  symbols: OutlineSymbol[];
+  totalSymbols: number;
+}
+
+// Singleton init guard
+let initialized = false;
+
+// Language WASM cache (Language loading is heavy IO, cache aggressively)
+const languageCache = new Map<string, Parser.Language>();
+
+// Resolve WASM paths via createRequire (works in ESM)
+const _require = createRequire(import.meta.url);
+
+function getWasmDir(): string {
+  return join(dirname(_require.resolve('tree-sitter-wasms/package.json')), 'out');
+}
+
+async function ensureInit(): Promise<void> {
+  if (initialized) return;
+  await Parser.init();
+  initialized = true;
+}
+
+async function loadLanguage(grammarName: string): Promise<Parser.Language> {
+  const cached = languageCache.get(grammarName);
+  if (cached) return cached;
+
+  const wasmPath = join(getWasmDir(), `tree-sitter-${grammarName}.wasm`);
+  const lang = await Parser.Language.load(wasmPath);
+  languageCache.set(grammarName, lang);
+  return lang;
+}
+
+/**
+ * Parse a source file into an outline of symbols.
+ */
+export async function parseOutline(
+  filePath: string,
+  content: string,
+  config: LanguageConfig
+): Promise<OutlineResult> {
+  await ensureInit();
+
+  const language = await loadLanguage(config.grammarName);
+  const parser = new Parser();
+  parser.setLanguage(language);
+
+  const tree = parser.parse(content);
+  if (!tree) {
+    parser.delete();
+    return { file: filePath, language: config.grammarName, symbols: [], totalSymbols: 0 };
+  }
+
+  let query: Parser.Query;
+  try {
+    query = language.query(config.symbolQuery);
+  } catch (err) {
+    tree.delete();
+    parser.delete();
+    throw new Error(`Query compilation failed for ${config.grammarName}: ${(err as Error).message}`);
+  }
+
+  const matches = query.matches(tree.rootNode);
+  const contentLines = content.split('\n');
+  const symbols: OutlineSymbol[] = [];
+
+  for (const match of matches) {
+    const symbol = processMatch(match, contentLines, config.grammarName);
+    if (symbol) symbols.push(symbol);
+  }
+
+  // Sort by line position
+  symbols.sort((a, b) => a.line - b.line);
+
+  // Clean up native resources
+  query.delete();
+  tree.delete();
+  parser.delete();
+
+  return {
+    file: filePath,
+    language: config.grammarName,
+    symbols,
+    totalSymbols: symbols.length,
+  };
+}
+
+/**
+ * Process a single query match into an OutlineSymbol.
+ */
+function processMatch(
+  match: Parser.QueryMatch,
+  contentLines: string[],
+  language: string
+): OutlineSymbol | null {
+  let nameNode: Parser.SyntaxNode | null = null;
+  let defNode: Parser.SyntaxNode | null = null;
+  let kind = 'function';
+
+  for (const capture of match.captures) {
+    if (capture.name === 'name') {
+      nameNode = capture.node;
+    } else if (capture.name.startsWith('definition.')) {
+      defNode = capture.node;
+      kind = capture.name.slice('definition.'.length);
+    }
+  }
+
+  if (!defNode || !nameNode) return null;
+
+  const name = nameNode.text;
+  const line = defNode.startPosition.row;
+  const endLine = defNode.endPosition.row;
+  const signature = extractSignature(defNode.text, language);
+  const doc = extractDoc(defNode, contentLines, language);
+  const parent = findParent(defNode);
+  const children = countChildren(defNode, kind);
+
+  return {
+    kind: kind as OutlineSymbol['kind'],
+    name,
+    line,
+    endLine,
+    doc,
+    signature,
+    parent,
+    children,
+  };
+}
+
+/**
+ * Extract a concise signature from the node text.
+ * Takes the first line, removes the body start, truncates to 200 chars.
+ */
+function extractSignature(nodeText: string, language: string): string {
+  const firstLine = nodeText.split('\n')[0].trimEnd();
+  let sig = firstLine;
+
+  if (language === 'python') {
+    // Remove trailing colon (body start)
+    if (sig.endsWith(':')) {
+      sig = sig.slice(0, -1).trimEnd();
+    }
+  } else {
+    // Remove opening brace and everything after
+    const braceIdx = sig.indexOf('{');
+    if (braceIdx > 0) {
+      sig = sig.substring(0, braceIdx).trimEnd();
+    }
+  }
+
+  if (sig.length > 200) {
+    sig = sig.substring(0, 200) + '...';
+  }
+
+  return sig;
+}
+
+/**
+ * Extract documentation comment for a definition node.
+ */
+function extractDoc(
+  defNode: Parser.SyntaxNode,
+  contentLines: string[],
+  language: string
+): string | null {
+  if (language === 'python') {
+    return extractPythonDocstring(defNode);
+  }
+  return extractCommentDoc(defNode, contentLines);
+}
+
+/**
+ * Extract comment doc by looking at lines before the definition.
+ */
+function extractCommentDoc(
+  defNode: Parser.SyntaxNode,
+  contentLines: string[]
+): string | null {
+  const defLine = defNode.startPosition.row;
+  let endIdx = defLine - 1;
+  if (endIdx < 0) return null;
+
+  // Skip at most one blank line
+  if (contentLines[endIdx].trim() === '') {
+    endIdx--;
+    if (endIdx < 0) return null;
+  }
+
+  const endText = contentLines[endIdx].trim();
+
+  // Block comment ending with */
+  if (endText.endsWith('*/')) {
+    let startIdx = endIdx;
+    while (startIdx > 0 && !contentLines[startIdx].trim().startsWith('/*')) {
+      startIdx--;
+    }
+    return cleanBlockComment(contentLines.slice(startIdx, endIdx + 1).join('\n'));
+  }
+
+  // Line comments (// or /// or #)
+  if (endText.startsWith('//') || endText.startsWith('#')) {
+    let startIdx = endIdx;
+    while (startIdx > 0) {
+      const prevText = contentLines[startIdx - 1].trim();
+      if (prevText.startsWith('//') || prevText.startsWith('#')) {
+        startIdx--;
+      } else {
+        break;
+      }
+    }
+    return cleanLineComments(contentLines.slice(startIdx, endIdx + 1).join('\n'));
+  }
+
+  return null;
+}
+
+/**
+ * Extract Python docstring from function/class body.
+ */
+function extractPythonDocstring(defNode: Parser.SyntaxNode): string | null {
+  const body = defNode.childForFieldName('body');
+  if (!body) return null;
+
+  const firstChild = body.namedChildren[0];
+  if (!firstChild || firstChild.type !== 'expression_statement') return null;
+
+  const expr = firstChild.namedChildren[0];
+  if (!expr || (expr.type !== 'string' && expr.type !== 'concatenated_string')) return null;
+
+  let text = expr.text;
+  // Remove triple-quote markers
+  for (const quote of ['"""', "'''"]) {
+    if (text.startsWith(quote) && text.endsWith(quote)) {
+      text = text.slice(3, -3);
+      break;
+    }
+  }
+  text = text.trim();
+  return text || null;
+}
+
+/**
+ * Clean block comment text.
+ */
+function cleanBlockComment(text: string): string | null {
+  let lines = text.split('\n');
+  // Remove /* and */
+  lines[0] = lines[0].replace(/^\s*\/\*\*?\s?/, '');
+  lines[lines.length - 1] = lines[lines.length - 1].replace(/\s*\*\/\s*$/, '');
+  // Remove leading * from middle lines
+  lines = lines.map(l => l.replace(/^\s*\*\s?/, ''));
+  const result = lines.join('\n').trim();
+  return result || null;
+}
+
+/**
+ * Clean line comment (// or #) text.
+ */
+function cleanLineComments(text: string): string | null {
+  const lines = text.split('\n').map(l => l.replace(/^\s*(?:\/\/\/?\s?|#\s?)/, ''));
+  const result = lines.join('\n').trim();
+  return result || null;
+}
+
+/**
+ * Find the parent class/interface/impl name for a definition node.
+ */
+function findParent(defNode: Parser.SyntaxNode): string | null {
+  let current = defNode.parent;
+  while (current) {
+    const type = current.type;
+
+    // Common parent types across languages
+    if (
+      type === 'class_declaration' || type === 'interface_declaration' ||
+      type === 'class_definition' || type === 'enum_declaration' ||
+      type === 'impl_item' || type === 'class_specifier' || type === 'struct_specifier'
+    ) {
+      // Try 'name' field first, then 'type' field (for Rust impl_item)
+      const nameNode = current.childForFieldName('name') || current.childForFieldName('type');
+      if (nameNode) return nameNode.text;
+    }
+
+    current = current.parent;
+  }
+
+  return null;
+}
+
+/**
+ * Count direct children (methods/properties) for class/interface nodes.
+ */
+function countChildren(defNode: Parser.SyntaxNode, kind: string): number {
+  if (kind !== 'class' && kind !== 'interface') return 0;
+
+  // Find the body node (class_body, interface_body, block, declaration_list, etc.)
+  let body = defNode.childForFieldName('body');
+  if (!body) {
+    for (const child of defNode.namedChildren) {
+      if (
+        child.type === 'class_body' || child.type === 'interface_body' ||
+        child.type === 'declaration_list' || child.type === 'block' ||
+        child.type === 'enum_body' || child.type === 'field_declaration_list'
+      ) {
+        body = child;
+        break;
+      }
+    }
+  }
+
+  if (!body) return 0;
+  return body.namedChildCount;
+}
--- a/ccw/src/utils/outline-queries.ts
+++ b/ccw/src/utils/outline-queries.ts
@@ -0,0 +1,150 @@
+/**
+ * Language configurations and tree-sitter query definitions for outline parsing.
+ */
+
+import { extname } from 'path';
+
+export interface LanguageConfig {
+  grammarName: string;
+  extensions: string[];
+  symbolQuery: string;
+}
+
+export const LANGUAGE_CONFIGS: Record<string, LanguageConfig> = {
+  typescript: {
+    grammarName: 'typescript',
+    extensions: ['.ts'],
+    symbolQuery: [
+      '(function_declaration name: (identifier) @name) @definition.function',
+      '(class_declaration name: (type_identifier) @name) @definition.class',
+      '(method_definition name: (property_identifier) @name) @definition.method',
+      '(abstract_method_signature name: (property_identifier) @name) @definition.method',
+      '(interface_declaration name: (type_identifier) @name) @definition.interface',
+      '(type_alias_declaration name: (type_identifier) @name) @definition.type',
+      '(enum_declaration name: (identifier) @name) @definition.enum',
+      '(variable_declarator name: (identifier) @name value: (arrow_function)) @definition.function',
+      '(variable_declarator name: (identifier) @name value: (function_expression)) @definition.function',
+    ].join('\n'),
+  },
+  tsx: {
+    grammarName: 'tsx',
+    extensions: ['.tsx'],
+    symbolQuery: [
+      '(function_declaration name: (identifier) @name) @definition.function',
+      '(class_declaration name: (type_identifier) @name) @definition.class',
+      '(method_definition name: (property_identifier) @name) @definition.method',
+      '(interface_declaration name: (type_identifier) @name) @definition.interface',
+      '(type_alias_declaration name: (type_identifier) @name) @definition.type',
+      '(enum_declaration name: (identifier) @name) @definition.enum',
+      '(variable_declarator name: (identifier) @name value: (arrow_function)) @definition.function',
+      '(variable_declarator name: (identifier) @name value: (function_expression)) @definition.function',
+    ].join('\n'),
+  },
+  javascript: {
+    grammarName: 'javascript',
+    extensions: ['.js', '.jsx', '.mjs', '.cjs'],
+    symbolQuery: [
+      '(function_declaration name: (identifier) @name) @definition.function',
+      '(class_declaration name: (identifier) @name) @definition.class',
+      '(method_definition name: (property_identifier) @name) @definition.method',
+      '(variable_declarator name: (identifier) @name value: (arrow_function)) @definition.function',
+      '(variable_declarator name: (identifier) @name value: (function_expression)) @definition.function',
+    ].join('\n'),
+  },
+  python: {
+    grammarName: 'python',
+    extensions: ['.py'],
+    symbolQuery: [
+      '(function_definition name: (identifier) @name) @definition.function',
+      '(class_definition name: (identifier) @name) @definition.class',
+    ].join('\n'),
+  },
+  go: {
+    grammarName: 'go',
+    extensions: ['.go'],
+    symbolQuery: [
+      '(function_declaration name: (identifier) @name) @definition.function',
+      '(method_declaration name: (field_identifier) @name) @definition.method',
+      '(type_spec name: (type_identifier) @name) @definition.type',
+    ].join('\n'),
+  },
+  rust: {
+    grammarName: 'rust',
+    extensions: ['.rs'],
+    symbolQuery: [
+      '(function_item name: (identifier) @name) @definition.function',
+      '(struct_item name: (type_identifier) @name) @definition.class',
+      '(enum_item name: (type_identifier) @name) @definition.enum',
+      '(trait_item name: (type_identifier) @name) @definition.interface',
+      '(impl_item type: (type_identifier) @name) @definition.class',
+    ].join('\n'),
+  },
+  java: {
+    grammarName: 'java',
+    extensions: ['.java'],
+    symbolQuery: [
+      '(class_declaration name: (identifier) @name) @definition.class',
+      '(method_declaration name: (identifier) @name) @definition.method',
+      '(interface_declaration name: (identifier) @name) @definition.interface',
+      '(enum_declaration name: (identifier) @name) @definition.enum',
+      '(constructor_declaration name: (identifier) @name) @definition.method',
+    ].join('\n'),
+  },
+  csharp: {
+    grammarName: 'c_sharp',
+    extensions: ['.cs'],
+    symbolQuery: [
+      '(class_declaration name: (identifier) @name) @definition.class',
+      '(method_declaration name: (identifier) @name) @definition.method',
+      '(interface_declaration name: (identifier) @name) @definition.interface',
+      '(enum_declaration name: (identifier) @name) @definition.enum',
+      '(constructor_declaration name: (identifier) @name) @definition.method',
+    ].join('\n'),
+  },
+  c: {
+    grammarName: 'c',
+    extensions: ['.c', '.h'],
+    symbolQuery: [
+      '(function_definition declarator: (function_declarator declarator: (identifier) @name)) @definition.function',
+      '(struct_specifier name: (type_identifier) @name) @definition.class',
+      '(enum_specifier name: (type_identifier) @name) @definition.enum',
+    ].join('\n'),
+  },
+  cpp: {
+    grammarName: 'cpp',
+    extensions: ['.cpp', '.hpp', '.cc', '.cxx'],
+    symbolQuery: [
+      '(function_definition declarator: (function_declarator declarator: (identifier) @name)) @definition.function',
+      '(function_definition declarator: (function_declarator declarator: (qualified_identifier name: (identifier) @name))) @definition.function',
+      '(class_specifier name: (type_identifier) @name) @definition.class',
+      '(struct_specifier name: (type_identifier) @name) @definition.class',
+      '(enum_specifier name: (type_identifier) @name) @definition.enum',
+    ].join('\n'),
+  },
+};
+
+// Build extension → language name lookup map
+const EXTENSION_MAP = new Map<string, string>();
+for (const [lang, config] of Object.entries(LANGUAGE_CONFIGS)) {
+  for (const ext of config.extensions) {
+    EXTENSION_MAP.set(ext, lang);
+  }
+}
+
+/**
+ * Detect language config from file path extension or explicit hint.
+ * Returns null if language is not supported.
+ */
+export function detectLanguage(filePath: string, hint?: string): LanguageConfig | null {
+  if (hint) {
+    const normalized = hint.toLowerCase();
+    const config = LANGUAGE_CONFIGS[normalized];
+    if (config) return config;
+  }
+
+  const ext = extname(filePath).toLowerCase();
+  const lang = EXTENSION_MAP.get(ext);
+  if (lang) return LANGUAGE_CONFIGS[lang];
+
+  return null;
+}
--- a/codex-lens/benchmarks/results/compare_2026-02-09_dir_rr_fast5.json
+++ b/codex-lens/benchmarks/results/compare_2026-02-09_dir_rr_fast5.json
@@ -0,0 +1,466 @@
+{
+  "summary": {
+    "timestamp": "2026-02-09 20:48:55",
+    "source": "src",
+    "k": 10,
+    "coarse_k": 100,
+    "query_count": 7,
+    "avg_jaccard_topk": 0.11418494830148965,
+    "avg_rbo_topk": 0.08910725003591835,
+    "staged": {
+      "success": 7,
+      "avg_latency_ms": 16443.109000005894
+    },
+    "dense_rerank": {
+      "success": 7,
+      "avg_latency_ms": 2919.481471432107
+    }
+  },
+  "comparisons": [
+    {
+      "query": "class Config",
+      "staged": {
+        "strategy": "staged",
+        "query": "class Config",
+        "latency_ms": 6056.956700026989,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\path_mapper.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\api\\references.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\api\\semantic.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\server.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\parsers\\factory.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\__init__.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\watcher\\file_watcher.py"
+        ],
+        "stage_stats": {
+          "stage_times": {
+            "stage1_binary_ms": 113.12270164489746,
+            "stage1_fallback_search_ms": 262.55249977111816,
+            "stage2_expand_ms": 3022.8426456451416,
+            "stage3_cluster_ms": 1.155853271484375,
+            "stage4_rerank_ms": 2554.953098297119
+          },
+          "stage_counts": {
+            "stage1_candidates": 37,
+            "stage1_fallback_used": 1,
+            "stage2_expanded": 86,
+            "stage2_unique_paths": 53,
+            "stage2_duplicate_paths": 33,
+            "stage3_clustered": 20,
+            "stage3_strategy": "dir_rr",
+            "stage4_reranked": 20
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "class Config",
+        "latency_ms": 2788.0383999943733,
+        "num_results": 10,
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+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\chunker.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\vector_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\query_parser.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\code_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\embedding_manager.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\migration_manager.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\registry.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\sqlite_store.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
+      "jaccard_topk": 0.05263157894736842,
+      "rbo_topk": 0.014635885139999999,
+      "staged_unique_files_topk": 10,
+      "dense_unique_files_topk": 10,
+      "staged_unique_dirs_topk": 8,
+      "dense_unique_dirs_topk": 4
+    },
+    {
+      "query": "def search",
+      "staged": {
+        "strategy": "staged",
+        "query": "def search",
+        "latency_ms": 12229.477500021458,
+        "num_results": 3,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\entities.py"
+        ],
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+          "stage_times": {
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+            "stage3_clustered": 4,
+            "stage3_strategy": "dir_rr",
+            "stage4_reranked": 4
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "def search",
+        "latency_ms": 2823.377499997616,
+        "num_results": 10,
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+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\vector_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\registry.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\code_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\chunker.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
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+      "rbo_topk": 0.23541639942571424,
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+      "staged_unique_dirs_topk": 2,
+      "dense_unique_dirs_topk": 4
+    },
+    {
+      "query": "LspBridge",
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+        "strategy": "staged",
+        "query": "LspBridge",
+        "latency_ms": 33805.434699982405,
+        "num_results": 5,
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+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\lsp_bridge.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\lsp_graph_builder.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\standalone_manager.py"
+        ],
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+          "stage_times": {
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+          },
+          "stage_counts": {
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+            "stage1_fallback_used": 1,
+            "stage2_expanded": 5,
+            "stage2_unique_paths": 5,
+            "stage2_duplicate_paths": 0,
+            "stage3_clustered": 5,
+            "stage3_strategy": "dir_rr",
+            "stage4_reranked": 5
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "LspBridge",
+        "latency_ms": 2906.127400010824,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\vector_meta_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\graph_expander.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\registry.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\sqlite_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\code_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\chunker.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
+      "jaccard_topk": 0.07142857142857142,
+      "rbo_topk": 0.045191399425714276,
+      "staged_unique_files_topk": 5,
+      "dense_unique_files_topk": 10,
+      "staged_unique_dirs_topk": 2,
+      "dense_unique_dirs_topk": 4
+    },
+    {
+      "query": "graph expansion",
+      "staged": {
+        "strategy": "staged",
+        "query": "graph expansion",
+        "latency_ms": 16790.213800013065,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\migrations\\migration_007_add_graph_neighbors.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\lsp_graph_builder.py",
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+            "stage2_expanded": 31,
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+            "stage2_duplicate_paths": 20,
+            "stage3_clustered": 20,
+            "stage3_strategy": "score",
+            "stage4_reranked": 20
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "LspBridge",
+        "latency_ms": 2901.0302999913692,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\vector_meta_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\graph_expander.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\registry.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\sqlite_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\code_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\chunker.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
+      "jaccard_topk": 0.06666666666666667,
+      "rbo_topk": 0.045191399425714276,
+      "staged_unique_files_topk": 6,
+      "dense_unique_files_topk": 10,
+      "staged_unique_dirs_topk": 2,
+      "dense_unique_dirs_topk": 4
+    },
+    {
+      "query": "graph expansion",
+      "staged": {
+        "strategy": "staged",
+        "query": "graph expansion",
+        "latency_ms": 9120.886200010777,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\migrations\\migration_007_add_graph_neighbors.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\lsp_graph_builder.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\ann_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\config.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\graph_expander.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\enrichment.py"
+        ],
+        "stage_stats": {
+          "stage_times": {
+            "stage1_binary_ms": 91.48454666137695,
+            "stage1_fallback_search_ms": 172.12390899658203,
+            "stage2_expand_ms": 6166.24903678894,
+            "stage3_cluster_ms": 0.00095367431640625,
+            "stage4_rerank_ms": 2601.947546005249
+          },
+          "stage_counts": {
+            "stage1_candidates": 11,
+            "stage1_fallback_used": 1,
+            "stage2_expanded": 16,
+            "stage2_unique_paths": 13,
+            "stage2_duplicate_paths": 3,
+            "stage3_clustered": 16,
+            "stage3_strategy": "score",
+            "stage4_reranked": 16
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "graph expansion",
+        "latency_ms": 2847.6964999735355,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\migration_manager.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\global_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\registry.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\sqlite_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\vector_store.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
+      "jaccard_topk": 0.1875,
+      "rbo_topk": 0.06134116970571428,
+      "staged_unique_files_topk": 9,
+      "dense_unique_files_topk": 10,
+      "staged_unique_dirs_topk": 7,
+      "dense_unique_dirs_topk": 4
+    },
+    {
+      "query": "clustering strategy",
+      "staged": {
+        "strategy": "staged",
+        "query": "clustering strategy",
+        "latency_ms": 8424.535699993372,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\config.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\__init__.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\clustering\\dbscan_strategy.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\clustering\\noop_strategy.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\clustering\\base.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\clustering\\hdbscan_strategy.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\clustering\\frequency_strategy.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\clustering\\factory.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\clustering\\__init__.py"
+        ],
+        "stage_stats": {
+          "stage_times": {
+            "stage1_binary_ms": 92.8945541381836,
+            "stage1_fallback_search_ms": 192.06547737121582,
+            "stage2_expand_ms": 5568.126440048218,
+            "stage3_cluster_ms": 0.0011920928955078125,
+            "stage4_rerank_ms": 2480.673313140869
+          },
+          "stage_counts": {
+            "stage1_candidates": 10,
+            "stage1_fallback_used": 1,
+            "stage2_expanded": 10,
+            "stage2_unique_paths": 10,
+            "stage2_duplicate_paths": 0,
+            "stage3_clustered": 10,
+            "stage3_strategy": "score",
+            "stage4_reranked": 10
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "clustering strategy",
+        "latency_ms": 2974.9999000132084,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\code_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\vector_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\__init__.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\gpu_support.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\enrichment.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\chunker.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
+      "jaccard_topk": 0.1111111111111111,
+      "rbo_topk": 0.04670528456571428,
+      "staged_unique_files_topk": 10,
+      "dense_unique_files_topk": 10,
+      "staged_unique_dirs_topk": 3,
+      "dense_unique_dirs_topk": 4
+    },
+    {
+      "query": "error handling",
+      "staged": {
+        "strategy": "staged",
+        "query": "error handling",
+        "latency_ms": 9253.624700009823,
+        "num_results": 6,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\lsp_bridge.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\gpu_support.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\rotational_embedder.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\watcher\\manager.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py"
+        ],
+        "stage_stats": {
+          "stage_times": {
+            "stage1_binary_ms": 102.18691825866699,
+            "stage1_fallback_search_ms": 176.97691917419434,
+            "stage2_expand_ms": 6113.626480102539,
+            "stage3_cluster_ms": 0.00095367431640625,
+            "stage4_rerank_ms": 2774.4452953338623
+          },
+          "stage_counts": {
+            "stage1_candidates": 5,
+            "stage1_fallback_used": 1,
+            "stage2_expanded": 13,
+            "stage2_unique_paths": 6,
+            "stage2_duplicate_paths": 7,
+            "stage3_clustered": 13,
+            "stage3_strategy": "score",
+            "stage4_reranked": 13
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "error handling",
+        "latency_ms": 2860.619900047779,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\__init__.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\registry.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\chunker.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\code_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\embedding_manager.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
+      "jaccard_topk": 0.07142857142857142,
+      "rbo_topk": 0.045191399425714276,
+      "staged_unique_files_topk": 5,
+      "dense_unique_files_topk": 10,
+      "staged_unique_dirs_topk": 4,
+      "dense_unique_dirs_topk": 4
+    },
+    {
+      "query": "how to parse json",
+      "staged": {
+        "strategy": "staged",
+        "query": "how to parse json",
+        "latency_ms": 9119.772599995136,
+        "num_results": 7,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\lsp\\standalone_manager.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\parsers\\factory.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\indexing\\symbol_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\parsers\\treesitter_parser.py"
+        ],
+        "stage_stats": {
+          "stage_times": {
+            "stage1_binary_ms": 90.18850326538086,
+            "stage1_fallback_search_ms": 157.95397758483887,
+            "stage2_expand_ms": 6293.469429016113,
+            "stage3_cluster_ms": 0.0011920928955078125,
+            "stage4_rerank_ms": 2486.8383407592773
+          },
+          "stage_counts": {
+            "stage1_candidates": 4,
+            "stage1_fallback_used": 1,
+            "stage2_expanded": 9,
+            "stage2_unique_paths": 7,
+            "stage2_duplicate_paths": 2,
+            "stage3_clustered": 9,
+            "stage3_strategy": "score",
+            "stage4_reranked": 9
+          }
+        },
+        "error": null
+      },
+      "dense_rerank": {
+        "strategy": "dense_rerank",
+        "query": "how to parse json",
+        "latency_ms": 2991.0379999876022,
+        "num_results": 10,
+        "topk_paths": [
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\cli\\commands.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\chain_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\index_tree.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\code_extractor.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\dir_index.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\hybrid_search.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\search\\ranking.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\chunker.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\storage\\sqlite_store.py",
+          "d:\\claude_dms3\\codex-lens\\src\\codexlens\\semantic\\ann_index.py"
+        ],
+        "stage_stats": null,
+        "error": null
+      },
+      "jaccard_topk": 0.21428571428571427,
+      "rbo_topk": 0.18590219827714285,
+      "staged_unique_files_topk": 7,
+      "dense_unique_files_topk": 10,
+      "staged_unique_dirs_topk": 5,
+      "dense_unique_dirs_topk": 4
+    }
+  ]
+}
--- a/codex-lens/src/codexlens/lsp/lsp_graph_builder.py
+++ b/codex-lens/src/codexlens/lsp/lsp_graph_builder.py
@@ -134,7 +134,10 @@ class LspGraphBuilder:
        # Skip if already visited or at max depth
        if node.id in visited:
            return []
-        if depth > self.max_depth:
+        # Depth is 0 for seeds. To limit expansion to N hops from seeds,
+        # we expand nodes with depth < max_depth.
+        if depth >= self.max_depth:
+            visited.add(node.id)
            return []
        if len(graph.nodes) >= self.max_nodes:
            return []
--- a/codex-lens/tests/test_lsp_graph_builder_depth.py
+++ b/codex-lens/tests/test_lsp_graph_builder_depth.py
@@ -0,0 +1,36 @@
+from __future__ import annotations
+
+import asyncio
+from unittest.mock import AsyncMock
+
+import pytest
+
+from codexlens.hybrid_search.data_structures import CodeAssociationGraph, CodeSymbolNode, Range
+from codexlens.lsp.lsp_graph_builder import LspGraphBuilder
+
+
+@pytest.mark.asyncio
+async def test_lsp_graph_builder_does_not_expand_at_max_depth() -> None:
+    """Depth semantics: max_depth is the number of hops from seeds."""
+    builder = LspGraphBuilder(max_depth=1, max_nodes=10, max_concurrent=1, resolve_symbols=False)
+
+    bridge = AsyncMock()
+    bridge.get_references.side_effect = RuntimeError("should not call references")
+    bridge.get_call_hierarchy.side_effect = RuntimeError("should not call call hierarchy")
+
+    node = CodeSymbolNode(
+        id="x.py:foo:1",
+        name="foo",
+        kind="function",
+        file_path="x.py",
+        range=Range(start_line=1, start_character=1, end_line=1, end_character=1),
+    )
+    graph = CodeAssociationGraph()
+    visited: set[str] = set()
+    sem = asyncio.Semaphore(1)
+
+    # Seeds are depth=0. A node at depth==max_depth should not be expanded.
+    new_nodes = await builder._expand_node(node, 1, graph, bridge, visited, sem)  # type: ignore[attr-defined]
+    assert new_nodes == []
+    assert node.id in visited
+
--- a/codex-lens/tests/test_staged_stage1_fallback_seed.py
+++ b/codex-lens/tests/test_staged_stage1_fallback_seed.py
@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from unittest.mock import MagicMock
+
+from codexlens.config import Config
+from codexlens.entities import SearchResult
+from codexlens.search.chain_search import ChainSearchEngine, ChainSearchResult, SearchOptions
+
+
+def _extract_stage_stats(result: ChainSearchResult) -> dict:
+    for item in result.stats.errors or []:
+        if isinstance(item, str) and item.startswith("STAGE_STATS:"):
+            return json.loads(item[len("STAGE_STATS:") :])
+    raise AssertionError("missing STAGE_STATS payload")
+
+
+def test_staged_pipeline_seeds_from_fts_when_stage1_empty(monkeypatch) -> None:
+    cfg = Config.load()
+    cfg.enable_staged_rerank = False
+    cfg.staged_stage2_mode = "realtime"  # ensure we pass through stage2 wrapper
+    cfg.staged_clustering_strategy = "score"
+
+    engine = ChainSearchEngine(registry=MagicMock(), mapper=MagicMock(), config=cfg)
+
+    # Avoid touching registry/mapper/index stores.
+    monkeypatch.setattr(engine, "_find_start_index", lambda *_a, **_k: Path("X:/fake/_index.db"))
+    monkeypatch.setattr(engine, "_collect_index_paths", lambda *_a, **_k: [Path("X:/fake/_index.db")])
+
+    # Force Stage 1 to return empty so the FTS seeding path is exercised.
+    monkeypatch.setattr(engine, "_stage1_binary_search", lambda *_a, **_k: ([], Path("X:/fake")))
+
+    seed_results = [SearchResult(path="D:/p/a.py", score=1.0), SearchResult(path="D:/p/b.py", score=0.9)]
+
+    # Provide a stable SearchStats instance for the fallback search call.
+    from codexlens.search.chain_search import SearchStats
+
+    monkeypatch.setattr(engine, "search", lambda *_a, **_k: ChainSearchResult(query="q", results=seed_results, symbols=[], stats=SearchStats()))
+
+    # Make later stages no-ops so we only validate plumbing.
+    monkeypatch.setattr(engine, "_stage2_lsp_expand", lambda results, *_a, **_k: results)
+    monkeypatch.setattr(engine, "_stage3_cluster_prune", lambda results, *_a, **_k: results)
+
+    result = engine.staged_cascade_search("q", Path("."), k=2, coarse_k=5, options=SearchOptions())
+    stage_stats = _extract_stage_stats(result)
+
+    assert stage_stats["stage_counts"].get("stage1_fallback_used") == 1
+    assert result.results and [r.path for r in result.results] == ["D:/p/a.py", "D:/p/b.py"]
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,6 +27,8 @@
        "node-pty": "^1.1.0-beta21",
        "open": "^9.1.0",
        "ora": "^7.0.0",
+        "tree-sitter-wasms": "^0.1.13",
+        "web-tree-sitter": "^0.24.0",
        "zod": "^4.1.13"
      },
      "bin": {
@@ -25844,6 +25846,15 @@
        "tree-kill": "cli.js"
      }
    },
+    "node_modules/tree-sitter-wasms": {
+      "version": "0.1.13",
+      "resolved": "https://registry.npmjs.org/tree-sitter-wasms/-/tree-sitter-wasms-0.1.13.tgz",
+      "integrity": "sha512-wT+cR6DwaIz80/vho3AvSF0N4txuNx/5bcRKoXouOfClpxh/qqrF4URNLQXbbt8MaAxeksZcZd1j8gcGjc+QxQ==",
+      "license": "Unlicense",
+      "dependencies": {
+        "tree-sitter-wasms": "^0.1.11"
+      }
+    },
    "node_modules/trim-lines": {
      "version": "3.0.1",
      "resolved": "https://registry.npmjs.org/trim-lines/-/trim-lines-3.0.1.tgz",
@@ -28411,6 +28422,12 @@
        "url": "https://github.com/sponsors/wooorm"
      }
    },
+    "node_modules/web-tree-sitter": {
+      "version": "0.24.0",
+      "resolved": "https://registry.npmjs.org/web-tree-sitter/-/web-tree-sitter-0.24.0.tgz",
+      "integrity": "sha512-NZWxfjayD1NlO4klbaR7ohHTp67uBjYC/y7pr+aaiqdpAbRHvmSs30f6O562E6YrwaZwFVu38HIA7GDmuxgtUg==",
+      "license": "MIT"
+    },
    "node_modules/web-vitals": {
      "version": "5.1.0",
      "resolved": "https://registry.npmjs.org/web-vitals/-/web-vitals-5.1.0.tgz",
--- a/package.json
+++ b/package.json
@@ -60,6 +60,8 @@
    "node-pty": "^1.1.0-beta21",
    "open": "^9.1.0",
    "ora": "^7.0.0",
+    "tree-sitter-wasms": "^0.1.13",
+    "web-tree-sitter": "^0.24.0",
    "zod": "^4.1.13"
  },
  "files": [