feat(app): embed indexer in Electron with file-watching service and UI refinements

Extract schema DDL into scripts/schema.sql shared between CLI and app.
  Add an in-process chokidar-based indexer-service that watches ~/.claude/projects
  for JSONL changes, debounces, and triggers background rebuilds via a worker
  thread. Rename Usage view to Activity, flesh out MemoryDetail and SubagentDetail
  views, and refine App.vue layout/routing. The main process now starts/stops the
  indexer lifecycle and notifies renderer windows on index updates.

README.md

@@ -123,8 +123,12 @@ same SQLite data.
 
 - `references/schema.md` — full SQLite schema and API reference
 - `references/query-patterns.md` — copyable CodeAct recipes for common retrieval tasks
+- `references/retrieval-semantics.md` — query design frame for scoped and synthesis retrieval
 - `references/pitfalls.md` — scope, FTS, ordering, compact/raw, and field-name traps
 
+The executable SQLite schema lives in `scripts/schema.sql`; `references/schema.md`
+is the human/agent explanation of that contract.
+
 The design is progressive disclosure with guardrails: the main skill keeps the
 core contract and high-risk pitfalls visible, while longer recipes and the full
 schema stay out of the first prompt until the agent needs them.
@@ -149,16 +153,22 @@ Full-text search via FTS5 covers message text across every session layer and ran
 .claude/skills/obelisk/
 ├── SKILL.md              # Skill definition + simple API + examples
 ├── scripts/
-│   └── runtime.mjs       # Indexer + query runtime (400 lines, zero deps)
+│   ├── schema.sql        # Executable SQLite schema
+│   └── runtime.mjs       # Indexer + query runtime (zero deps)
 └── references/
     ├── schema.md          # Full table schema + advanced API reference
     ├── query-patterns.md  # Copyable retrieval recipes
+    ├── retrieval-semantics.md # Query design frame for retrieval semantics
     └── pitfalls.md        # Scope, FTS, ordering, and compactness traps
 ```
 
 ## Implementation Notes
 
 The index rebuilds incrementally — only new or modified JSONL files are re-parsed.
+When the optional app is running, it is the active indexer: it watches Claude
+project files, builds in a worker thread, writes `__app_heartbeat__` plus
+`__app_last_successful_build__` into `index_state`, and the skill-side lazy
+build skips work only while both markers are fresh.
 
 Zero npm dependencies. Uses Node 22's built-in node:sqlite with FTS5. The entire runtime is ~400 lines.
 

SKILL.md

@@ -144,7 +144,9 @@ Read-only SQL SELECT/WITH with `?` placeholders. Returns array rows. SQL is an
 escape hatch for exact structured joins and aggregations after the helper-first
 surface is insufficient; it is not the default retrieval entry point.
 
-Before writing non-trivial SQL, read `references/schema.md`. Common safe joins:
+Before writing non-trivial SQL, read `references/schema.md`. The executable DDL
+lives in `scripts/schema.sql`; use the reference for query semantics and the SQL
+file for schema-source alignment. Common safe joins:
 
 - `tool_calls` does not have timestamps. Join `messages m ON m.uuid = tc.message_uuid`.
 - `tool_results` does not have timestamps. Join `messages m ON m.uuid = tr.message_uuid`.

app/indexer-service.js

@@ -0,0 +1,163 @@
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+
+const DEFAULT_PROJECTS_DIR = path.join(os.homedir(), '.claude', 'projects');
+const DEFAULT_DEBOUNCE_MS = 2000;
+const DEFAULT_STABILITY_MS = 500;
+const DEFAULT_HEARTBEAT_MS = 30000;
+const DEFAULT_WATCH_RETRY_MS = 5000;
+
+function createIndexerService({
+  projectsDir = DEFAULT_PROJECTS_DIR,
+  debounceMs = DEFAULT_DEBOUNCE_MS,
+  stabilityMs = DEFAULT_STABILITY_MS,
+  heartbeatMs = DEFAULT_HEARTBEAT_MS,
+  watchRetryMs = DEFAULT_WATCH_RETRY_MS,
+  buildIndex,
+  writeHeartbeat = () => {},
+  watchProjects,
+  chokidar,
+  timers = {
+    setTimeout,
+    clearTimeout,
+    setInterval,
+    clearInterval,
+  },
+  logger = console,
+} = {}) {
+  if (typeof buildIndex !== 'function') throw new Error('createIndexerService() requires buildIndex');
+  const watch = watchProjects || ((onChange) => {
+    if (!fs.existsSync(projectsDir)) return null;
+    const watcher = (chokidar || require('chokidar')).watch(projectsDir, {
+      cwd: projectsDir,
+      ignoreInitial: true,
+      awaitWriteFinish: {
+        stabilityThreshold: Math.max(stabilityMs, 500),
+        pollInterval: 100,
+      },
+      ignored: (targetPath, stats) => {
+        if (stats?.isDirectory()) return false;
+        if (!stats) return false;
+        return !String(targetPath).endsWith('.jsonl') && !String(targetPath).endsWith('.json');
+      },
+    });
+    const onFileChange = (filename) => {
+      const name = filename ? String(filename) : '';
+      if (!name || name.endsWith('.jsonl') || name.endsWith('.json')) onChange(name);
+    };
+    return watcher
+      .on('add', onFileChange)
+      .on('change', onFileChange)
+      .on('unlink', onFileChange)
+      .on('error', (error) => {
+        logger.warn?.(`Obelisk watcher failed: ${error.message}`);
+      });
+  });
+
+  let buildTimer = null;
+  let stabilityTimer = null;
+  let heartbeatTimer = null;
+  let watchRetryTimer = null;
+  let watcher = null;
+  let stopped = false;
+  let running = false;
+  let pending = false;
+  let lastReason = null;
+  let idlePromise = Promise.resolve();
+
+  const runBuildNow = (reason = 'manual') => {
+    if (stopped) return idlePromise;
+    if (running) {
+      pending = true;
+      return idlePromise;
+    }
+    running = true;
+    pending = false;
+    idlePromise = (async () => {
+      await buildIndex({ reason });
+      writeHeartbeat();
+    })()
+      .catch((error) => {
+        logger.warn?.(`Obelisk index build failed: ${error.message}`);
+      })
+      .finally(() => {
+        running = false;
+        if (pending && !stopped) {
+          pending = false;
+          runBuildNow('pending');
+        }
+      });
+    return idlePromise;
+  };
+
+  const scheduleBuild = (reason = 'change') => {
+    if (stopped) return;
+    lastReason = reason;
+    if (running) pending = true;
+    if (buildTimer) timers.clearTimeout(buildTimer);
+    if (stabilityTimer) timers.clearTimeout(stabilityTimer);
+    buildTimer = timers.setTimeout(() => {
+      buildTimer = null;
+      if (stabilityMs <= 0) {
+        runBuildNow(lastReason || reason);
+        return;
+      }
+      stabilityTimer = timers.setTimeout(() => {
+        stabilityTimer = null;
+        runBuildNow(lastReason || reason);
+      }, stabilityMs);
+    }, debounceMs);
+  };
+
+  const startWatching = () => {
+    if (stopped || watcher) return;
+    watcher = watch(() => scheduleBuild('watch'));
+    if (!watcher) {
+      watchRetryTimer = timers.setTimeout(() => {
+        watchRetryTimer = null;
+        startWatching();
+      }, watchRetryMs);
+    }
+  };
+
+  const start = ({ buildOnStart = true } = {}) => {
+    stopped = false;
+    if (buildOnStart) scheduleBuild('startup');
+    startWatching();
+    if (typeof timers.setInterval === 'function') {
+      heartbeatTimer = timers.setInterval(() => {
+        try {
+          writeHeartbeat();
+        } catch (error) {
+          logger.warn?.(`Obelisk heartbeat failed: ${error.message}`);
+        }
+      }, heartbeatMs);
+    }
+  };
+
+  const stop = () => {
+    stopped = true;
+    pending = false;
+    if (buildTimer) timers.clearTimeout(buildTimer);
+    buildTimer = null;
+    if (stabilityTimer) timers.clearTimeout(stabilityTimer);
+    stabilityTimer = null;
+    if (watchRetryTimer) timers.clearTimeout(watchRetryTimer);
+    watchRetryTimer = null;
+    if (heartbeatTimer && typeof timers.clearInterval === 'function') timers.clearInterval(heartbeatTimer);
+    heartbeatTimer = null;
+    if (watcher?.close) watcher.close();
+    watcher = null;
+  };
+
+  return {
+    start,
+    stop,
+    scheduleBuild,
+    runBuildNow,
+    idle: () => idlePromise,
+  };
+}
+
+module.exports = { createIndexerService };

app/indexer-worker-client.js

@@ -0,0 +1,59 @@
+const path = require('path');
+const { Worker } = require('worker_threads');
+
+function createWorkerBuildIndex({
+  workerPath = path.join(__dirname, 'indexer-worker.js'),
+  WorkerImpl = Worker,
+} = {}) {
+  let worker = null;
+  let nextId = 1;
+  const pending = new Map();
+
+  const rejectPending = (error) => {
+    for (const { reject } of pending.values()) reject(error);
+    pending.clear();
+  };
+
+  const ensureWorker = () => {
+    if (worker) return worker;
+    worker = new WorkerImpl(workerPath);
+    worker.on('message', (message) => {
+      const current = pending.get(message.id);
+      if (!current) return;
+      pending.delete(message.id);
+      if (message.error) {
+        const error = new Error(message.error.message);
+        error.stack = message.error.stack;
+        current.reject(error);
+      } else {
+        current.resolve(message.result);
+      }
+    });
+    worker.on('error', (error) => {
+      rejectPending(error);
+      worker = null;
+    });
+    worker.on('exit', (code) => {
+      if (pending.size) rejectPending(new Error(`Indexer worker exited with code ${code}`));
+      worker = null;
+    });
+    return worker;
+  };
+
+  const buildIndex = (args = {}) => new Promise((resolve, reject) => {
+    const id = nextId++;
+    pending.set(id, { resolve, reject });
+    ensureWorker().postMessage({ id, args });
+  });
+
+  const stop = () => {
+    const current = worker;
+    worker = null;
+    if (current?.terminate) current.terminate();
+    rejectPending(new Error('Indexer worker stopped'));
+  };
+
+  return { buildIndex, stop };
+}
+
+module.exports = { createWorkerBuildIndex };

app/indexer-worker.js

@@ -0,0 +1,17 @@
+const { parentPort } = require('worker_threads');
+const { buildIndex } = require('./indexer');
+
+parentPort.on('message', ({ id, args }) => {
+  try {
+    const result = buildIndex(args || {});
+    parentPort.postMessage({ id, result });
+  } catch (error) {
+    parentPort.postMessage({
+      id,
+      error: {
+        message: error.message,
+        stack: error.stack,
+      },
+    });
+  }
+});

app/indexer.js

@@ -0,0 +1,439 @@
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+const Database = require('better-sqlite3');
+
+const TEXT_LIMIT = 10000;
+const DEFAULT_CLAUDE_DIR = path.join(os.homedir(), '.claude');
+const DEFAULT_DB_PATH = path.join(DEFAULT_CLAUDE_DIR, 'obelisk.sqlite');
+const DEFAULT_PROJECTS_DIR = path.join(DEFAULT_CLAUDE_DIR, 'projects');
+const DEFAULT_HISTORY_PATH = path.join(DEFAULT_CLAUDE_DIR, 'history.jsonl');
+
+function resolveSchemaPath() {
+  const candidates = [
+    path.join(__dirname, 'schema.sql'),
+    path.join(__dirname, '..', 'scripts', 'schema.sql'),
+    process.resourcesPath ? path.join(process.resourcesPath, 'scripts', 'schema.sql') : null,
+  ].filter(Boolean);
+  const found = candidates.find(p => fs.existsSync(p));
+  if (!found) throw new Error('Obelisk schema.sql not found');
+  return found;
+}
+
+function openIndexDb({ dbPath = DEFAULT_DB_PATH, schemaPath = resolveSchemaPath(), DatabaseImpl = Database } = {}) {
+  fs.mkdirSync(path.dirname(dbPath), { recursive: true });
+  const db = new DatabaseImpl(dbPath);
+  db.pragma('journal_mode = WAL');
+  db.pragma('synchronous = NORMAL');
+  db.exec(fs.readFileSync(schemaPath, 'utf8'));
+  migrateDb(db);
+  return db;
+}
+
+function ensureColumn(db, table, column, definition) {
+  const columns = db.prepare(`PRAGMA table_info(${table})`).all().map(c => c.name);
+  if (!columns.includes(column)) db.exec(`ALTER TABLE ${table} ADD COLUMN ${column} ${definition}`);
+}
+
+function migrateDb(db) {
+  ensureColumn(db, 'messages', 'content_type', 'TEXT');
+  ensureColumn(db, 'messages', 'is_meta', 'INTEGER DEFAULT 0');
+  ensureColumn(db, 'memories', 'anchors', 'TEXT');
+  ensureColumn(db, 'memories', 'deleted_at', 'TEXT');
+  ensureColumn(db, 'memories', 'deleted_reason', 'TEXT');
+}
+
+function trunc(s) {
+  return typeof s === 'string' && s.length > TEXT_LIMIT ? s.slice(0, TEXT_LIMIT) : s;
+}
+
+function truncJson(obj, limit = TEXT_LIMIT) {
+  if (obj === null || obj === undefined) return null;
+  const walk = (v) => {
+    if (typeof v === 'string') return v.length > limit ? v.slice(0, limit) + '...[truncated]' : v;
+    if (Array.isArray(v)) return v.map(walk);
+    if (typeof v === 'object' && v !== null) {
+      const out = {};
+      for (const [k, val] of Object.entries(v)) out[k] = walk(val);
+      return out;
+    }
+    return v;
+  };
+  return JSON.stringify(walk(obj));
+}
+
+function extractText(content) {
+  if (typeof content === 'string') return trunc(content);
+  if (!Array.isArray(content)) return null;
+  const parts = [];
+  for (const b of content) {
+    if (b.type === 'text' && b.text) parts.push(b.text);
+    else if (b.type === 'thinking' && b.thinking) parts.push(b.thinking);
+  }
+  return parts.length ? trunc(parts.join('\n')) : null;
+}
+
+function extractContentType(content) {
+  if (typeof content === 'string') return 'text';
+  if (!Array.isArray(content) || !content.length) return 'unknown';
+  const types = new Set();
+  let sawUnknown = false;
+  for (const b of content) {
+    if (!b || typeof b !== 'object') { sawUnknown = true; continue; }
+    if (b.type === 'text') types.add('text');
+    else if (b.type === 'thinking') types.add('thinking');
+    else if (b.type === 'tool_use') types.add('tool_use');
+    else if (b.type === 'tool_result') types.add('tool_result');
+    else sawUnknown = true;
+  }
+  return !sawUnknown && types.size === 1 ? [...types][0] : 'unknown';
+}
+
+const COMMAND_ENVELOPE_RE = /^\s*(<command-name>[^<]+<\/command-name>|<task-notification>|<local-command-caveat>|<local-command-stdout>)/;
+
+function extractMessageIsMeta(record, text = extractText(record?.message?.content)) {
+  const msg = record?.message || {};
+  if (record?.isMeta === true || msg.isMeta === true) return 1;
+  return typeof text === 'string' && COMMAND_ENVELOPE_RE.test(text) ? 1 : 0;
+}
+
+function filePath(name, input) {
+  if (!input) return null;
+  return ['Read', 'Edit', 'Write', 'NotebookEdit'].includes(name) ? (input.file_path || null) : null;
+}
+
+function isDir(p) {
+  try {
+    return fs.statSync(p).isDirectory();
+  } catch {
+    return false;
+  }
+}
+
+function readLines(filePath, callback) {
+  const data = fs.readFileSync(filePath, 'utf8');
+  const lines = data.split('\n');
+  for (const line of lines) {
+    if (line && callback(line) === false) return;
+  }
+}
+
+function legacyProjectPathFromSlug(project) {
+  if (!project) return null;
+  return '/' + project.replace(/-/g, '/').replace(/^\//, '');
+}
+
+function normalizeObservedCwd(cwd) {
+  if (typeof cwd !== 'string' || !cwd.trim() || !path.isAbsolute(cwd)) return null;
+  return path.normalize(cwd);
+}
+
+function inferProjectPath(project, observedCwds = []) {
+  const byPath = new Map();
+  for (const cwd of observedCwds) {
+    const normalized = normalizeObservedCwd(cwd);
+    if (!normalized) continue;
+    const current = byPath.get(normalized) || { path: normalized, count: 0, first: byPath.size };
+    current.count++;
+    byPath.set(normalized, current);
+  }
+  const best = [...byPath.values()].sort((a, b) => b.count - a.count || a.first - b.first)[0];
+  return best?.path || legacyProjectPathFromSlug(project);
+}
+
+function discoverJsonlFiles({ projectsDir = DEFAULT_PROJECTS_DIR } = {}) {
+  const files = [];
+  if (!fs.existsSync(projectsDir)) return files;
+  let projects;
+  try { projects = fs.readdirSync(projectsDir); } catch { return files; }
+  for (const proj of projects) {
+    const projPath = path.join(projectsDir, proj);
+    if (!isDir(projPath)) continue;
+    let entries;
+    try { entries = fs.readdirSync(projPath); } catch { continue; }
+    for (const f of entries) {
+      if (f.endsWith('.jsonl'))
+        files.push({ path: path.join(projPath, f), sessionId: f.slice(0, -6), project: proj, isSubagent: false });
+    }
+    for (const sd of entries) {
+      const saDir = path.join(projPath, sd, 'subagents');
+      if (!isDir(saDir)) continue;
+      let saEntries;
+      try { saEntries = fs.readdirSync(saDir); } catch { continue; }
+      for (const sf of saEntries) {
+        if (sf.endsWith('.jsonl'))
+          files.push({ path: path.join(saDir, sf), sessionId: sd, project: proj, isSubagent: true, agentId: sf.slice(0, -6) });
+      }
+      const wfRoot = path.join(saDir, 'workflows');
+      if (!isDir(wfRoot)) continue;
+      let wfDirs;
+      try { wfDirs = fs.readdirSync(wfRoot); } catch { continue; }
+      for (const wfDir of wfDirs) {
+        const wfPath = path.join(wfRoot, wfDir);
+        if (!isDir(wfPath)) continue;
+        let wfEntries;
+        try { wfEntries = fs.readdirSync(wfPath); } catch { continue; }
+        for (const wf of wfEntries) {
+          if (wf.endsWith('.jsonl'))
+            files.push({ path: path.join(wfPath, wf), sessionId: sd, project: proj, isSubagent: true, agentId: wf.slice(0, -6), workflowRunId: wfDir });
+        }
+      }
+    }
+  }
+  return files;
+}
+
+function needsReindex(db, fp) {
+  const mt = fs.statSync(fp).mtimeMs;
+  const row = db.prepare('SELECT mtime, lines_processed FROM index_state WHERE jsonl_path = ?').get(fp);
+  if (!row) return { needed: true, skip: 0, mtime: mt };
+  return mt > row.mtime ? { needed: true, skip: row.lines_processed, mtime: mt } : { needed: false, skip: 0, mtime: mt };
+}
+
+function indexJsonl(db, fi) {
+  const { needed, skip, mtime } = needsReindex(db, fi.path);
+  if (!needed) return;
+  const ins = {
+    ses: db.prepare('INSERT OR REPLACE INTO sessions (id,title,project,project_path,started_at,ended_at,git_branch,version,message_count,jsonl_path) VALUES (?,?,?,?,?,?,?,?,?,?)'),
+    msg: db.prepare('INSERT OR REPLACE INTO messages (uuid,session_id,type,parent_uuid,timestamp,role,text,content_type,is_meta,model,is_sidechain,agent_id,input_tokens,output_tokens,cwd,skill) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)'),
+    tc:  db.prepare('INSERT OR REPLACE INTO tool_calls (id,message_uuid,session_id,name,input_json,file_path) VALUES (?,?,?,?,?,?)'),
+    tr:  db.prepare('INSERT OR REPLACE INTO tool_results (tool_use_id,message_uuid,session_id,content,file_path,is_error) VALUES (?,?,?,?,?,?)'),
+    sum: db.prepare('INSERT OR REPLACE INTO summaries (id,session_id,timestamp,source,content) VALUES (?,?,?,?,?)'),
+    idx: db.prepare('INSERT OR REPLACE INTO index_state (jsonl_path,mtime,lines_processed) VALUES (?,?,?)'),
+  };
+  const existing = !fi.isSubagent ? db.prepare('SELECT * FROM sessions WHERE id = ?').get(fi.sessionId) : null;
+  const sm = {
+    started_at: existing?.started_at || null,
+    ended_at: existing?.ended_at || null,
+    git_branch: existing?.git_branch || null,
+    version: existing?.version || null,
+    title: existing?.title || null,
+    n: existing?.message_count || 0,
+    cwds: [],
+  };
+
+  let lineNum = 0;
+  readLines(fi.path, (line) => {
+    lineNum++;
+    if (lineNum <= skip) return;
+    let obj;
+    try { obj = JSON.parse(line); } catch { return; }
+    const sid = fi.sessionId;
+    const ts = obj.timestamp || null;
+    if (obj.type === 'ai-title' && obj.aiTitle) { sm.title = obj.aiTitle; return; }
+    if (obj.type === 'system' && obj.subtype === 'away_summary' && obj.content) {
+      ins.sum.run(obj.uuid || `${sid}-away-${ts}`, sid, ts, 'away_summary', obj.content);
+      return;
+    }
+    if (obj.type === 'system' && obj.subtype === 'turn_duration' && obj.parentUuid && obj.durationMs) {
+      db.prepare('UPDATE messages SET turn_duration_ms=? WHERE uuid=?').run(obj.durationMs, obj.parentUuid);
+      return;
+    }
+    if (obj.type !== 'user' && obj.type !== 'assistant') return;
+    if (ts && (!sm.started_at || ts < sm.started_at)) sm.started_at = ts;
+    if (ts && (!sm.ended_at || ts > sm.ended_at)) sm.ended_at = ts;
+    if (obj.gitBranch) sm.git_branch = obj.gitBranch;
+    if (obj.version) sm.version = obj.version;
+    sm.n++;
+    if (!fi.isSubagent && obj.cwd) sm.cwds.push(obj.cwd);
+
+    const msg = obj.message || {};
+    const text = extractText(msg.content);
+    const contentType = extractContentType(msg.content);
+    const isMeta = extractMessageIsMeta(obj, text);
+    const usage = msg.usage || {};
+    const aid = fi.isSubagent ? fi.agentId : (obj.agentId || null);
+    if (obj.uuid) {
+      ins.msg.run(obj.uuid, sid, obj.type, obj.parentUuid || null, ts,
+        msg.role || obj.type, text, contentType, isMeta, msg.model || null,
+        obj.isSidechain ? 1 : 0, aid, usage.input_tokens || null, usage.output_tokens || null,
+        obj.cwd || null, obj.attributionSkill || null);
+    }
+    if (obj.type === 'assistant' && Array.isArray(msg.content)) {
+      for (const b of msg.content) {
+        if (b.type === 'tool_use' && b.id)
+          ins.tc.run(b.id, obj.uuid, sid, b.name, truncJson(b.input || {}), filePath(b.name, b.input));
+      }
+    }
+    if (obj.type === 'user' && Array.isArray(msg.content)) {
+      for (const b of msg.content) {
+        if (b.type !== 'tool_result' || !b.tool_use_id) continue;
+        const rt = typeof b.content === 'string' ? b.content
+          : Array.isArray(b.content) ? b.content.map(c => c.text || '').join('\n') : '';
+        ins.tr.run(b.tool_use_id, obj.uuid, sid, trunc(rt), obj.toolUseResult?.filePath || null, b.is_error ? 1 : 0);
+      }
+    }
+  });
+
+  if (!fi.isSubagent) {
+    const pp = inferProjectPath(fi.project, sm.cwds);
+    ins.ses.run(fi.sessionId, sm.title, fi.project, pp, sm.started_at, sm.ended_at, sm.git_branch, sm.version, sm.n, fi.path);
+  }
+  ins.idx.run(fi.path, mtime, lineNum);
+}
+
+function refreshSessionProjectPaths(db) {
+  const sessions = db.prepare('SELECT id, project FROM sessions').all();
+  const cwdStmt = db.prepare(`
+    SELECT cwd FROM messages
+    WHERE session_id = ? AND cwd IS NOT NULL AND cwd != ''
+    ORDER BY timestamp IS NULL, timestamp
+  `);
+  const update = db.prepare('UPDATE sessions SET project_path = ? WHERE id = ?');
+  for (const session of sessions) {
+    const cwds = cwdStmt.all(session.id).map(row => row.cwd);
+    const projectPath = inferProjectPath(session.project, cwds);
+    if (projectPath) update.run(projectPath, session.id);
+  }
+}
+
+function indexSubagentMeta(db, fi) {
+  if (!fi.isSubagent) return;
+  const mp = fi.path.replace('.jsonl', '.meta.json');
+  if (!fs.existsSync(mp)) return;
+  try {
+    const meta = JSON.parse(fs.readFileSync(mp, 'utf8'));
+    const tok = db.prepare('SELECT COALESCE(SUM(input_tokens),0)+COALESCE(SUM(output_tokens),0) as t FROM messages WHERE agent_id=?').get(fi.agentId);
+    const ts = db.prepare('SELECT MIN(timestamp) as t0, MAX(timestamp) as t1 FROM messages WHERE agent_id=?').get(fi.agentId);
+    const dur = ts?.t0 && ts?.t1 ? new Date(ts.t1).getTime() - new Date(ts.t0).getTime() : null;
+    if (fi.workflowRunId) {
+      db.prepare('INSERT OR REPLACE INTO workflow_agents (agent_id,run_id,session_id,agent_type,description) VALUES(?,?,?,?,?)').run(fi.agentId, fi.workflowRunId, fi.sessionId, meta.agentType||null, meta.description||null);
+    } else {
+      db.prepare('INSERT OR REPLACE INTO subagents VALUES(?,?,?,?,?,?,?)').run(fi.agentId, fi.sessionId, meta.toolUseId||null, meta.agentType||null, meta.description||null, dur, tok?.t||0);
+    }
+  } catch (error) {
+    console.warn(`Warning: failed to read subagent meta ${mp}: ${error.message}`);
+  }
+}
+
+function indexWorkflows(db, { projectsDir = DEFAULT_PROJECTS_DIR } = {}) {
+  if (!fs.existsSync(projectsDir)) return;
+  let projects;
+  try { projects = fs.readdirSync(projectsDir); } catch { return; }
+  for (const proj of projects) {
+    const pp = path.join(projectsDir, proj);
+    if (!isDir(pp)) continue;
+    let entries;
+    try { entries = fs.readdirSync(pp); } catch { continue; }
+    for (const sd of entries) {
+      const wd = path.join(pp, sd, 'workflows');
+      if (!isDir(wd)) continue;
+      let wfFiles;
+      try { wfFiles = fs.readdirSync(wd); } catch { continue; }
+      for (const f of wfFiles) {
+        if (!f.endsWith('.json')) continue;
+        try {
+          const wf = JSON.parse(fs.readFileSync(path.join(wd, f), 'utf8'));
+          if (!wf.runId) continue;
+          const ac = db.prepare('SELECT COUNT(*) as c FROM workflow_agents WHERE run_id=?').get(wf.runId);
+          db.prepare('INSERT OR REPLACE INTO workflows (run_id,session_id,task_id,script,result_json,timestamp,agent_count,duration_ms,total_tokens,status,workflow_name) VALUES(?,?,?,?,?,?,?,?,?,?,?)').run(
+            wf.runId, sd, wf.taskId||null, wf.script||null,
+            wf.result ? JSON.stringify(wf.result) : null, wf.timestamp||null, ac?.c||0,
+            wf.durationMs||null, wf.totalTokens||null, wf.status||null, wf.workflowName||null);
+          const progress = wf.workflowProgress || [];
+          for (const item of progress) {
+            if (item.type !== 'workflow_agent' || !item.agentId) continue;
+            db.prepare('UPDATE workflow_agents SET phase=?, label=?, model=?, state=?, duration_ms=?, tokens=?, tool_calls=? WHERE agent_id=?').run(
+              item.phaseTitle||null, item.label||null, item.model||null, item.state||null,
+              item.durationMs||null, item.tokens||null, item.toolCalls||null, 'agent-' + item.agentId);
+          }
+        } catch (error) {
+          console.warn(`Warning: failed to index workflow ${f}: ${error.message}`);
+        }
+      }
+    }
+  }
+}
+
+function indexHistory(db, { historyPath = DEFAULT_HISTORY_PATH } = {}) {
+  if (!fs.existsSync(historyPath)) return;
+  readLines(historyPath, (line) => {
+    try {
+      const o = JSON.parse(line);
+      if (o.sessionId && o.title) db.prepare('UPDATE sessions SET title=? WHERE id=? AND title IS NULL').run(o.title, o.sessionId);
+    } catch (error) {
+      console.warn(`Warning: malformed history line: ${error.message}`);
+    }
+  });
+}
+
+function rebuildFts(db) {
+  db.exec("INSERT INTO messages_fts(messages_fts) VALUES('rebuild')");
+  db.exec("INSERT INTO memories_fts(memories_fts) VALUES('rebuild')");
+}
+
+function writeIndexMarker(db, key, value = Date.now()) {
+  db.prepare('INSERT OR REPLACE INTO index_state (jsonl_path, mtime, lines_processed) VALUES (?, ?, 0)').run(key, value);
+}
+
+function writeHeartbeat({ dbPath = DEFAULT_DB_PATH, DatabaseImpl = Database } = {}) {
+  if (!fs.existsSync(dbPath)) return;
+  const db = new DatabaseImpl(dbPath);
+  try {
+    writeIndexMarker(db, '__app_heartbeat__');
+  } finally {
+    db.close();
+  }
+}
+
+function buildIndex({
+  claudeDir = DEFAULT_CLAUDE_DIR,
+  projectsDir = path.join(claudeDir, 'projects'),
+  historyPath = path.join(claudeDir, 'history.jsonl'),
+  dbPath = path.join(claudeDir, 'obelisk.sqlite'),
+  schemaPath = resolveSchemaPath(),
+  DatabaseImpl = Database,
+  force = false,
+} = {}) {
+  const db = openIndexDb({ dbPath, schemaPath, DatabaseImpl });
+  const files = discoverJsonlFiles({ projectsDir });
+  const latestSourceMtime = files.reduce((latest, file) => {
+    try {
+      return Math.max(latest, fs.statSync(file.path).mtimeMs);
+    } catch {
+      return latest;
+    }
+  }, 0);
+
+  try {
+    if (force) db.prepare("DELETE FROM index_state WHERE jsonl_path NOT LIKE '__%'").run();
+    for (const file of files) {
+      db.exec('BEGIN');
+      try {
+        indexJsonl(db, file);
+        indexSubagentMeta(db, file);
+        db.exec('COMMIT');
+      } catch (error) {
+        db.exec('ROLLBACK');
+        console.warn(`Warning: failed to index ${file.path}: ${error.message}`);
+      }
+    }
+    db.exec('BEGIN');
+    try {
+      indexWorkflows(db, { projectsDir });
+      refreshSessionProjectPaths(db);
+      indexHistory(db, { historyPath });
+      rebuildFts(db);
+      writeIndexMarker(db, '__last_build__');
+      writeIndexMarker(db, '__app_heartbeat__');
+      writeIndexMarker(db, '__app_last_successful_build__');
+      writeIndexMarker(db, '__indexer_owner_app__');
+      if (latestSourceMtime) writeIndexMarker(db, '__last_source_mtime__', latestSourceMtime);
+      db.exec('COMMIT');
+    } catch (error) {
+      db.exec('ROLLBACK');
+      throw error;
+    }
+    return { files: files.length, latestSourceMtime };
+  } finally {
+    db.close();
+  }
+}
+
+module.exports = {
+  buildIndex,
+  writeHeartbeat,
+  openIndexDb,
+  discoverJsonlFiles,
+  inferProjectPath,
+};

app/main.js

@@ -3,18 +3,44 @@ const path = require('path');
 const os = require('os');
 const fs = require('fs');
 const Database = require('better-sqlite3');
+const { writeHeartbeat } = require('./indexer');
+const { createIndexerService } = require('./indexer-service');
+const { createWorkerBuildIndex } = require('./indexer-worker-client');
 
 const DB_PATH = path.join(os.homedir(), '.claude', 'obelisk.sqlite');
 
 let db;
+let indexerService;
+let indexerWorker;
 
 function openDb() {
   if (!fs.existsSync(DB_PATH)) return null;
+  if (db) db.close();
   db = new Database(DB_PATH, { readonly: false });
   db.pragma('journal_mode = WAL');
   return db;
 }
 
+function notifyIndexUpdated() {
+  for (const win of BrowserWindow.getAllWindows()) {
+    win.webContents.send('obelisk:index-updated');
+  }
+}
+
+function startIndexerService() {
+  indexerService = createIndexerService({
+    buildIndex: async ({ reason }) => {
+      const result = await indexerWorker.buildIndex({ reason });
+      openDb();
+      notifyIndexUpdated();
+      return result;
+    },
+    writeHeartbeat,
+  });
+  indexerService.start({ buildOnStart: false });
+  return indexerService;
+}
+
 function createWindow() {
   const win = new BrowserWindow({
     width: 1200,
@@ -41,14 +67,21 @@ function createWindow() {
 }
 
 app.whenReady().then(() => {
+  indexerWorker = createWorkerBuildIndex();
   openDb();
   createWindow();
+  startIndexerService().runBuildNow('startup');
 
   app.on('activate', () => {
     if (BrowserWindow.getAllWindows().length === 0) createWindow();
   });
 });
 
+app.on('before-quit', () => {
+  if (indexerService) indexerService.stop();
+  if (indexerWorker) indexerWorker.stop();
+});
+
 app.on('window-all-closed', () => {
   if (db) db.close();
   if (process.platform !== 'darwin') app.quit();
@@ -137,7 +170,7 @@ ipcMain.handle('db:getSessionSummaries', (_, sessionId) => {
 ipcMain.handle('db:getMemories', () => {
   if (!db) return [];
   return db.prepare(`
-    SELECT id, session_id, project, message_start, message_end, path, summary, created_at, deleted_at, deleted_reason
+    SELECT id, session_id, project, message_start, message_end, path, anchors, summary, created_at, deleted_at, deleted_reason
     FROM memories ORDER BY created_at DESC
   `).all();
 });

app/package-lock.json

@@ -8,7 +8,8 @@
       "name": "obelisk",
       "version": "0.1.0",
       "dependencies": {
-        "better-sqlite3": "^11.0.0"
+        "better-sqlite3": "^11.0.0",
+        "chokidar": "^4.0.3"
       },
       "devDependencies": {
         "@vitejs/plugin-vue": "^5.0.0",
@@ -2578,6 +2579,21 @@
         "url": "https://github.com/chalk/chalk?sponsor=1"
       }
     },
+    "node_modules/chokidar": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-4.0.3.tgz",
+      "integrity": "sha512-Qgzu8kfBvo+cA4962jnP1KkS6Dop5NS6g7R5LFYJr4b8Ub94PPQXUksCw9PvXoeXPRRddRNC5C1JQUR2SMGtnA==",
+      "license": "MIT",
+      "dependencies": {
+        "readdirp": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "node_modules/chownr": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
@@ -5681,6 +5697,19 @@
         "node": ">=10"
       }
     },
+    "node_modules/readdirp": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.1.2.tgz",
+      "integrity": "sha512-GDhwkLfywWL2s6vEjyhri+eXmfH6j1L7JE27WhqLeYzoh/A3DBaYGEj2H/HFZCn/kMfim73FXxEJTw06WtxQwg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14.18.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "node_modules/require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",

app/package.json

@@ -20,15 +20,28 @@
     "files": [
       "main.js",
       "preload.js",
+      "indexer.js",
+      "indexer-service.js",
+      "indexer-worker.js",
+      "indexer-worker-client.js",
       "dist-renderer/**/*",
-      "node_modules/better-sqlite3/**/*"
+      "node_modules/better-sqlite3/**/*",
+      "node_modules/chokidar/**/*",
+      "node_modules/readdirp/**/*"
+    ],
+    "extraResources": [
+      {
+        "from": "../scripts/schema.sql",
+        "to": "scripts/schema.sql"
+      }
     ],
     "asarUnpack": [
       "node_modules/better-sqlite3/**/*"
     ]
   },
   "dependencies": {
-    "better-sqlite3": "^11.0.0"
+    "better-sqlite3": "^11.0.0",
+    "chokidar": "^4.0.3"
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^5.0.0",

app/preload.js

@@ -19,4 +19,9 @@ contextBridge.exposeInMainWorld('obelisk', {
   getProjects: () => ipcRenderer.invoke('db:getProjects'),
   getStats: () => ipcRenderer.invoke('db:getStats'),
   getUsageStats: () => ipcRenderer.invoke('db:getUsageStats'),
+  onIndexUpdated: (callback) => {
+    const listener = () => callback();
+    ipcRenderer.on('obelisk:index-updated', listener);
+    return () => ipcRenderer.removeListener('obelisk:index-updated', listener);
+  },
 });

app/renderer/src/App.vue

@@ -25,16 +25,23 @@ const archivedCount = computed(() => state.memories.filter(m => m.archived).leng
 const totalMemoryCount = computed(() => state.memories.length);
 const sessionCount = computed(() => state.sessions.length);
 
+const currentRouteType = computed(() => {
+  const name = route.name;
+  if (name === 'SessionList' || name === 'SessionDetail' || name === 'SubagentDetail') return 'sessions';
+  if (name === 'Activity') return 'activity';
+  return 'memory';
+});
+
 const sidebarProjects = computed(() => {
-  const items = state.route === 'sessions' ? state.sessions : state.memories;
+  const items = currentRouteType.value === 'sessions' ? state.sessions : state.memories;
   const filtered = items.filter(item => {
-    if (state.route === 'sessions') return true;
+    if (currentRouteType.value === 'sessions') return true;
     return state.view === 'archived' ? item.archived : !item.archived;
   });
   let projects = [...new Set(filtered.map(item => item.project).filter(Boolean))];
   if (state.projectSearch) {
     const q = state.projectSearch.toLowerCase();
-    projects = projects.filter(p => p.toLowerCase().includes(q));
+    projects = projects.filter(p => formatProjectLabel(p).toLowerCase().includes(q));
   }
   projects.sort((a, b) => formatProjectLabel(a).localeCompare(formatProjectLabel(b)));
 
@@ -51,6 +58,11 @@ const sidebarProjects = computed(() => {
   }));
 });
 
+const totalProjectCount = computed(() => {
+  const items = currentRouteType.value === 'sessions' ? state.sessions : state.memories;
+  return new Set(items.map(i => i.project).filter(Boolean)).size;
+});
+
 // --- Toolbar visibility ---
 
 const showToolbar = computed(() => {
@@ -67,8 +79,8 @@ const showSearchMsgsToggle = computed(() => {
 const windowTitle = computed(() => {
   const appName = 'Obelisk';
   let scopeText = '';
-  if (route.name === 'Usage') {
+  if (route.name === 'Activity') {
-    scopeText = 'Usage';
+    scopeText = 'Activity';
   } else if (route.name?.startsWith('Session')) {
     if (route.name === 'SessionDetail' || route.name === 'SubagentDetail') {
       const s = state.sessions.find(x => x.id === route.params.id);
@@ -100,8 +112,8 @@ function handleSidebarRoute(routeName) {
   setRoute(routeName);
   if (routeName === 'sessions') {
     router.push('/sessions');
-  } else if (routeName === 'usage') {
+  } else if (routeName === 'activity') {
-    router.push('/usage');
+    router.push('/activity');
   } else {
     router.push('/memory');
   }
@@ -112,6 +124,10 @@ function handleSidebarView(view) {
   router.push('/memory');
 }
 
+function handleClearProject() {
+  setProject('all');
+}
+
 function handleSidebarProject(slug) {
   setProject(slug);
   // Stay on current list route
@@ -147,94 +163,125 @@ const keepAliveIncludes = ['SessionDetail'];
 </script>
 
 <template>
-  <div class="app-shell">
+  <div class="app">
-    <!-- Titlebar (macOS traffic-light region) -->
+    <div class="titlebar">
-    <div class="titlebar" :class="{ mac: IS_MAC }">
+      <div class="titlebar-text" id="titlebar-text">
-      <div class="titlebar-drag"></div>
-      <div id="titlebar-text" class="titlebar-text">
         <span class="app-name">{{ windowTitle.appName }}</span>
         <span class="sep">—</span>
         <span class="scope">{{ windowTitle.scopeText }}</span>
       </div>
     </div>
 
-    <!-- Columns: sidebar + main -->
     <div class="columns">
-      <!-- Sidebar -->
       <aside class="sidebar">
         <div class="sidebar-brand">
-          <svg viewBox="0 0 20 20" fill="none">
+          <svg viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
-            <circle cx="10" cy="10" r="8" stroke="currentColor" stroke-width="1.2" opacity="0.6"/>
+            <defs>
-            <path d="M10 4 L10 16" stroke="url(#obelisk-grad)" stroke-width="2.5" stroke-linecap="round"/>
+              <radialGradient id="icon-aurora" cx="50%" cy="62%" r="55%">
-            <defs><linearGradient id="obelisk-grad" x1="10" y1="4" x2="10" y2="16" gradientUnits="userSpaceOnUse"><stop stop-color="#a78bfa"/><stop offset="1" stop-color="#6366f1"/></linearGradient></defs>
+                <stop offset="0%"  stop-color="#ec4899" stop-opacity="0.8"/>
+                <stop offset="45%" stop-color="#a855f7" stop-opacity="0.7"/>
+                <stop offset="100%" stop-color="#6366f1" stop-opacity="0"/>
+              </radialGradient>
+              <linearGradient id="icon-stone-lit" x1="0" y1="0" x2="0" y2="1">
+                <stop offset="0%"  stop-color="#cbd5e1"/>
+                <stop offset="100%" stop-color="#475569"/>
+              </linearGradient>
+            </defs>
+            <ellipse cx="20" cy="22" rx="15" ry="11" fill="url(#icon-aurora)"/>
+            <ellipse cx="20" cy="21" rx="9"  ry="7"  fill="url(#icon-aurora)" opacity="0.7"/>
+            <circle cx="8"  cy="13" r="0.7" fill="#fff" opacity="0.9"/>
+            <circle cx="32" cy="11" r="0.9" fill="#fff" opacity="0.95"/>
+            <circle cx="34" cy="22" r="0.5" fill="#fff" opacity="0.7"/>
+            <polygon points="20,7 16.5,12 23.5,12" fill="url(#icon-stone-lit)"/>
+            <polygon points="20,12 16.5,12 17.5,33 20,33" fill="url(#icon-stone-lit)"/>
+            <polygon points="20,12 23.5,12 22.5,33 20,33" fill="#1e293b"/>
+            <rect x="15.5" y="33" width="9" height="1.6" rx="0.3" fill="#0f172a"/>
           </svg>
           <span class="name">Obelisk</span>
         </div>
 
-        <!-- Navigation section -->
         <div class="sidebar-section">
+          <div class="sidebar-section-title"><span>Library</span></div>
           <button
             class="sidebar-item"
             :class="{ active: state.route === 'sessions' && state.projectFilter === 'all' }"
             @click="handleSidebarRoute('sessions')"
           >
-            <span class="icon">
+            <svg class="icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5">
-              <svg viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4"><rect x="2" y="3" width="12" height="10" rx="1.5"/><path d="M5 1v4M11 1v4"/></svg>
+              <path d="M3 4h10v8a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V4z" stroke-linejoin="round"/>
-            </span>
+              <path d="M5.5 7h5M5.5 9.5h3" stroke-linecap="round"/>
+            </svg>
             <span class="label">Sessions</span>
             <span class="badge">{{ sessionCount }}</span>
           </button>
-
+          <button
+            class="sidebar-item"
+            :class="{ active: state.route === 'memory' && state.view === 'active' && state.projectFilter === 'all' }"
+            @click="handleSidebarView('active')"
+          >
+            <svg class="icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5">
+              <rect x="2.5" y="2.5" width="11" height="11" rx="2"/>
+              <path d="M5 8h6M5 5.5h6M5 10.5h4" stroke-linecap="round"/>
+            </svg>
+            <span class="label">Memory</span>
+            <span class="badge">{{ totalMemoryCount }}</span>
+          </button>
           <button
             class="sidebar-item sub"
             :class="{ active: state.route === 'memory' && state.view === 'active' && state.projectFilter === 'all' }"
             @click="handleSidebarView('active')"
           >
-            <span class="icon">
+            <svg class="icon" viewBox="0 0 12 12" fill="none" stroke="currentColor" stroke-width="1.5">
-              <svg viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4"><circle cx="8" cy="8" r="5.5"/><path d="M8 5v3l2 1.5"/></svg>
+              <circle cx="6" cy="6" r="2" fill="currentColor"/>
-            </span>
+            </svg>
             <span class="label">Active</span>
             <span class="badge">{{ activeCount }}</span>
           </button>
-
           <button
             class="sidebar-item sub"
             :class="{ active: state.route === 'memory' && state.view === 'archived' && state.projectFilter === 'all' }"
             @click="handleSidebarView('archived')"
           >
-            <span class="icon">
+            <svg class="icon" viewBox="0 0 12 12" fill="none" stroke="currentColor" stroke-width="1.5">
-              <svg viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4"><path d="M2.5 5h11v7.5a1.5 1.5 0 0 1-1.5 1.5H4a1.5 1.5 0 0 1-1.5-1.5V5z"/><path d="M1.5 3.5h13v2h-13z"/><path d="M6 8h4"/></svg>
+              <circle cx="6" cy="6" r="2"/>
-            </span>
+            </svg>
             <span class="label">Archived</span>
             <span class="badge">{{ archivedCount }}</span>
           </button>
+        </div>
 
+        <div class="sidebar-section">
+          <div class="sidebar-section-title"><span>Stats</span></div>
           <button
             class="sidebar-item"
-            :class="{ active: state.route === 'usage' }"
+            :class="{ active: route.name === 'Activity' }"
-            @click="handleSidebarRoute('usage')"
+            @click="handleSidebarRoute('activity')"
           >
-            <span class="icon">
+            <svg class="icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
-              <svg viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4"><path d="M2 13h12M4 9v4M7 6v7M10 8v5M13 4v9"/></svg>
+              <rect x="2" y="10" width="2.5" height="4"/>
-            </span>
+              <rect x="6" y="6" width="2.5" height="8"/>
-            <span class="label">Usage</span>
+              <rect x="10" y="3" width="2.5" height="11"/>
+            </svg>
+            <span class="label">Activity</span>
           </button>
         </div>
 
-        <!-- Projects section -->
         <div class="sidebar-section projects">
-          <div class="sidebar-section-title">
+          <div class="sidebar-section-title"><span>Projects</span></div>
-            <span>Projects</span>
+          <div class="sidebar-search" v-if="totalProjectCount >= 6">
-          </div>
+            <svg class="sidebar-search-icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.6">
-          <div class="sidebar-search">
+              <circle cx="7" cy="7" r="5"/>
+              <path d="M11 11l3 3" stroke-linecap="round"/>
+            </svg>
             <input
               type="text"
-              placeholder="Filter..."
+              placeholder="Filter projects…"
+              autocomplete="off"
               :value="state.projectSearch"
               @input="handleProjectSearch"
             />
           </div>
-          <div id="sidebar-projects" class="sidebar-projects-list">
+          <div class="sidebar-list" id="sidebar-projects">
             <button
               v-for="p in sidebarProjects"
               :key="p.slug"
@@ -242,62 +289,34 @@ const keepAliveIncludes = ['SessionDetail'];
               :class="{ active: state.projectFilter === p.slug }"
               @click="handleSidebarProject(p.slug)"
             >
-              <span class="icon" v-html="FOLDER_SVG"></span>
+              <svg class="icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linejoin="round">
+                <path d="M2 5.5V12a1.5 1.5 0 0 0 1.5 1.5h9A1.5 1.5 0 0 0 14 12V6.5A1.5 1.5 0 0 0 12.5 5H8.3L7 3.5H3.5A1.5 1.5 0 0 0 2 5z"/>
+              </svg>
               <span class="label">{{ p.label }}</span>
               <span class="badge">{{ p.count }}</span>
             </button>
-            <div v-if="!sidebarProjects.length" class="sidebar-empty">
-              No projects
-            </div>
           </div>
         </div>
       </aside>
 
-      <!-- Main content area -->
+      <main class="main">
-      <div class="main">
+        <div class="toolbar">
-        <!-- Toolbar with search + sort (only on list views) -->
+          <div class="breadcrumb" id="breadcrumb">
-        <div v-if="showToolbar" class="toolbar">
+            <template v-if="showToolbar">
-          <div class="breadcrumb">
-            <span class="crumb terminal">
-              {{ state.route === 'sessions' ? 'Sessions' : 'Memory' }}
-            </span>
               <template v-if="state.projectFilter !== 'all'">
+                <button class="crumb" @click="handleClearProject">
+                  {{ state.route === 'sessions' ? 'Sessions' : 'Memory' }}
+                </button>
                 <span class="crumb-sep">/</span>
                 <span class="crumb terminal">{{ formatProjectLabel(state.projectFilter) }}</span>
               </template>
-          </div>
+              <template v-else>
-          <div class="spacer"></div>
+                <span class="crumb terminal">
-          <div id="search-wrap" class="search-wrap">
+                  {{ state.route === 'sessions' ? 'Sessions' : state.route === 'memory' ? 'Memory' : 'Activity' }}
-            <input
+                </span>
-              id="search"
+              </template>
-              type="text"
+            </template>
-              class="search-input"
+            <template v-else>
-              placeholder="Search..."
-              @input="handleSearch"
-            />
-            <button
-              v-if="showSearchMsgsToggle"
-              class="filter-toggle"
-              :class="{ active: state.includeMessageBodies }"
-              @click="handleToggleSearchMsgs"
-              title="Include message bodies in search"
-            >
-              Msgs
-            </button>
-          </div>
-          <button
-            id="sort-toggle"
-            class="sort-group"
-            :class="{ desc: state.sortDesc, asc: !state.sortDesc }"
-            @click="handleToggleSort"
-          >
-            <span id="sort-label">{{ state.sortDesc ? 'newest' : 'oldest' }}</span>
-          </button>
-        </div>
-
-        <!-- Toolbar for detail views (breadcrumb only) -->
-        <div v-if="!showToolbar" class="toolbar">
-          <div class="breadcrumb">
               <router-link class="crumb" to="/sessions" v-if="route.name === 'SessionDetail' || route.name === 'SubagentDetail'">
                 Sessions
               </router-link>
@@ -326,115 +345,52 @@ const keepAliveIncludes = ['SessionDetail'];
                   {{ (state.memories.find(m => m.id === route.params.id)?.path || '').split('/').pop() }}
                 </span>
               </template>
-            <span v-if="route.name === 'Usage'" class="crumb terminal">Usage</span>
+              <span v-if="route.name === 'Activity'" class="crumb terminal">Activity</span>
+            </template>
           </div>
+          <div class="toolbar-spacer"></div>
+          <div class="toolbar-search" id="search-wrap" v-if="showToolbar">
+            <svg class="toolbar-search-icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.6">
+              <circle cx="7" cy="7" r="5"/>
+              <path d="M11 11l3 3" stroke-linecap="round"/>
+            </svg>
+            <input
+              id="search"
+              type="text"
+              placeholder="Search…"
+              autocomplete="off"
+              :value="state.query"
+              @input="handleSearch"
+            />
+            <span class="toolbar-search-kbd">/</span>
+          </div>
+          <button
+            v-if="showToolbar"
+            class="sort-group"
+            :class="{ desc: state.sortDesc, asc: !state.sortDesc }"
+            @click="handleToggleSort"
+            id="sort-toggle"
+            title="Toggle sort (S)"
+          >
+            <span class="label" id="sort-label">{{ state.sortDesc ? 'newest' : 'oldest' }}</span>
+            <svg viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round">
+              <path class="arrow-up"   d="M5 6l3-3 3 3"/>
+              <path class="arrow-down" d="M5 10l3 3 3-3"/>
+            </svg>
+          </button>
         </div>
 
-        <!-- Router view with keep-alive for SessionDetail -->
         <router-view v-slot="{ Component }">
-          <keep-alive :include="keepAliveIncludes">
+          <keep-alive :include="['SessionDetail']">
             <component :is="Component" />
           </keep-alive>
         </router-view>
-      </div>
+      </main>
     </div>
 
-    <!-- Status bar -->
     <div class="statusbar">
-      <div id="status-left" class="status-left"></div>
+      <div class="status-left" id="status-left"></div>
-      <div id="status-right" class="status-right"></div>
+      <div class="status-right" id="status-right"></div>
     </div>
   </div>
 </template>
-
-<style>
-@import '../styles/base.css';
-@import '../styles/sidebar.css';
-@import '../styles/toolbar.css';
-@import '../styles/list.css';
-@import '../styles/detail.css';
-@import '../styles/statusbar.css';
-</style>
-
-<style scoped>
-.app-shell {
-  display: flex;
-  flex-direction: column;
-  height: 100vh;
-  overflow: hidden;
-}
-
-.titlebar {
-  height: 38px;
-  flex-shrink: 0;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  position: relative;
-  -webkit-app-region: drag;
-  background: var(--bg-2);
-  border-bottom: 1px solid var(--hairline);
-}
-
-.titlebar.mac {
-  padding-left: 78px;
-}
-
-.titlebar-drag {
-  position: absolute;
-  inset: 0;
-}
-
-.titlebar-text {
-  font-size: 12px;
-  color: var(--muted);
-  display: flex;
-  align-items: center;
-  gap: 6px;
-  pointer-events: none;
-}
-
-.titlebar-text .app-name {
-  font-weight: 600;
-  color: var(--fg-2);
-}
-
-.titlebar-text .sep {
-  opacity: 0.4;
-}
-
-.columns {
-  display: flex;
-  flex: 1;
-  min-height: 0;
-}
-
-.spacer {
-  flex: 1;
-}
-
-.statusbar {
-  height: 26px;
-  flex-shrink: 0;
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: 0 12px;
-  background: var(--bg-2);
-  border-top: 1px solid var(--hairline);
-  font-size: 11px;
-  color: var(--muted);
-}
-
-.sidebar-empty {
-  padding: 8px 10px;
-  font-size: 11px;
-  color: var(--muted-2);
-}
-
-.sidebar-projects-list {
-  flex: 1;
-  overflow-y: auto;
-  min-height: 0;
-}
-</style>

app/renderer/src/components/Sidebar.vue

@@ -59,8 +59,8 @@ function isMemoryViewActive(view) {
   return state.route === 'memory' && state.view === view && state.projectFilter === 'all';
 }
 
-function isUsageActive() {
+function isActivityActive() {
-  return state.route === 'usage';
+  return state.route === 'activity';
 }
 
 function isProjectActive(slug) {
@@ -73,8 +73,8 @@ function handleSidebarRoute(routeName) {
   setRoute(routeName);
   if (routeName === 'sessions') {
     router.push('/sessions');
-  } else if (routeName === 'usage') {
+  } else if (routeName === 'activity') {
-    router.push('/usage');
+    router.push('/activity');
   } else {
     router.push('/memory');
   }
@@ -175,7 +175,7 @@ function handleProjectSearch(e) {
 
       <button
         class="sidebar-item"
-        :class="{ active: isUsageActive() }"
+        :class="{ active: isActivityActive() }"
         @click="handleSidebarRoute('usage')"
       >
         <span class="icon">
@@ -183,7 +183,7 @@ function handleProjectSearch(e) {
             <path d="M2 13h12M4 9v4M7 6v7M10 8v5M13 4v9"/>
           </svg>
         </span>
-        <span class="label">Usage</span>
+        <span class="label">Activity</span>
       </button>
     </div>
 

app/renderer/src/components/Toolbar.vue

@@ -44,8 +44,8 @@ const breadcrumbs = computed(() => {
     const m = state.memories.find(x => x.id === route.params.id);
     const filename = (m?.path || '').split('/').pop();
     crumbs.push({ label: filename, terminal: true, filename: true });
-  } else if (name === 'Usage') {
+  } else if (name === 'Activity') {
-    crumbs.push({ label: 'Usage', terminal: true });
+    crumbs.push({ label: 'Activity', terminal: true });
   }
 
   return crumbs;

app/renderer/src/data.js

@@ -22,16 +22,19 @@ export async function loadInitialData() {
     ts: m.created_at ? new Date(m.created_at).getTime() : 0,
     archived: !!m.deleted_at,
     archivedAt: m.deleted_at ? new Date(m.deleted_at).getTime() : null,
-    health: 'ok',
+    anchors: m.anchors ? (typeof m.anchors === 'string' ? JSON.parse(m.anchors) : m.anchors) : [],
-    anchors: [],
     markdown: null  // loaded on demand via loadMemoryMarkdown
   }));
 
-  // Sessions: keep DB shape, add empty messages array for on-demand loading
+  // Sessions: merge with existing data to preserve already-loaded messages
-  state.sessions = (rawSessions || []).map(s => ({
+  const existingSessions = new Map(state.sessions.map(s => [s.id, s]));
+  state.sessions = (rawSessions || []).map(s => {
+    const existing = existingSessions.get(s.id);
+    return {
       ...s,
-    messages: []
+      messages: existing?.messages?.length ? existing.messages : []
-  }));
+    };
+  });
 
   state.projects = projects || [];
   state.stats = stats || {};

app/renderer/src/main.js

@@ -17,9 +17,20 @@ const app = createApp(App);
 
 app.use(router);
 
-// Load data before the first render completes
+// Load data on startup
 router.isReady().then(() => {
   loadInitialData();
 });
 
+// Refresh data when window regains focus
+document.addEventListener('visibilitychange', () => {
+  if (document.visibilityState === 'visible') {
+    loadInitialData();
+  }
+});
+
+window.obelisk?.onIndexUpdated?.(() => {
+  loadInitialData();
+});
+
 app.mount('#app');

app/renderer/src/router.js

@@ -9,7 +9,7 @@ const SessionDetail = () => import('./views/SessionDetail.vue');
 const SubagentDetail = () => import('./views/SubagentDetail.vue');
 const MemoryList = () => import('./views/MemoryList.vue');
 const MemoryDetail = () => import('./views/MemoryDetail.vue');
-const Usage = () => import('./views/Usage.vue');
+const Activity = () => import('./views/Activity.vue');
 
 const routes = [
   {
@@ -42,9 +42,9 @@ const routes = [
     props: true
   },
   {
-    path: '/usage',
+    path: '/activity',
-    name: 'Usage',
+    name: 'Activity',
-    component: Usage
+    component: Activity
   },
   {
     path: '/',

app/renderer/src/utils.js

@@ -154,10 +154,12 @@ export function positionTooltip(el, x, y) {
 
 export function formatProjectLabel(slug) {
   if (!slug) return '(no project)';
-  const session = state.sessions.find(s => s.project === slug && s.project_path);
+  // Find the shortest project_path for this slug (most likely the project root)
-  if (session?.project_path) {
+  const sessions = state.sessions.filter(s => s.project === slug && s.project_path);
-    const parts = session.project_path.split('/');
+  if (sessions.length) {
-    return parts.slice(-2).join('/');
+    const shortest = sessions.reduce((a, b) => a.project_path.length <= b.project_path.length ? a : b);
+    const parts = shortest.project_path.split('/');
+    return parts[parts.length - 1];
   }
   return slug.replace(/^-/, '');
 }

app/renderer/src/views/Activity.vue

@@ -3,7 +3,7 @@ import { ref, reactive, computed, onMounted } from 'vue';
 import { state, navigateToSession } from '../store.js';
 import { fmtTokens, fmtDuration, fmtTooltipDate, positionTooltip, escapeHTML, formatProjectLabel } from '../utils.js';
 
-defineOptions({ name: 'Usage' });
+defineOptions({ name: 'Activity' });
 
 // --- State ---
 const activeTab = ref('daily');

app/renderer/src/views/MemoryDetail.vue

@@ -1,8 +1,116 @@
 <script setup>
+import { ref, computed, onMounted, watch } from 'vue';
+import { useRouter } from 'vue-router';
+import { state, FOLDER_SVG } from '../store.js';
+import { loadMemoryMarkdown, archiveMemory, restoreMemory, isTextTruncated } from '../data.js';
+import { escapeHTML, fmtRelative, renderMarkdown, formatProjectLabel } from '../utils.js';
+
 defineOptions({ name: 'MemoryDetail' });
-defineProps({ id: String });
+const props = defineProps({ id: String });
+const router = useRouter();
+
+const memory = computed(() => state.memories.find(m => m.id === props.id));
+const markdown = ref(null);
+const showSource = ref(false);
+const loading = ref(false);
+
+onMounted(async () => { await loadContent(); });
+watch(() => props.id, async () => { markdown.value = null; showSource.value = false; await loadContent(); });
+
+async function loadContent() {
+  const m = memory.value;
+  if (!m) return;
+  if (m.markdown != null) { markdown.value = m.markdown; return; }
+  if (m.path) {
+    loading.value = true;
+    const content = await loadMemoryMarkdown(m.path);
+    m.markdown = content;
+    markdown.value = content;
+    loading.value = false;
+  }
+}
+
+async function handleArchive() {
+  const m = memory.value;
+  if (!m) return;
+  if (m.archived) await restoreMemory(m.id);
+  else await archiveMemory(m.id);
+  router.push('/memory');
+}
+
+function goToSession() {
+  const m = memory.value;
+  if (m?.session_id) router.push(`/sessions/${m.session_id}`);
+}
 </script>
 
 <template>
-  <div class="view-placeholder">MemoryDetail view for {{ id }} (TODO)</div>
+  <div class="detail" v-if="memory">
+    <div class="detail-header">
+      <div class="detail-eyebrow">
+        <span class="project-icon" v-html="FOLDER_SVG"></span>
+        <span class="project-name">{{ formatProjectLabel(memory.project) }}</span>
+        <span v-if="memory.archived" class="archived-tag">archived</span>
+      </div>
+      <div class="detail-path">{{ memory.path }}</div>
+      <div class="detail-summary">{{ memory.summary }}</div>
+      <div class="detail-meta">
+        <button v-if="memory.session_id" class="session-link" @click="goToSession">
+          <svg viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linejoin="round" style="width:11px;height:11px;">
+            <path d="M3 4h10v8a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1V4z"/>
+            <path d="M5.5 7h5M5.5 9.5h3" stroke-linecap="round"/>
+          </svg>
+          <span>Source session</span>
+        </button>
+        <span class="dot" v-if="memory.session_id"></span>
+        <span>created {{ fmtRelative(memory.ts) }}</span>
+        <template v-if="memory.message_start">
+          <span class="dot"></span>
+          <span style="font-family:var(--font-mono);font-size:11px;">{{ memory.message_start.slice(0, 8) }}…→ {{ (memory.message_end || '').slice(0, 8) }}…</span>
+        </template>
+      </div>
+    </div>
+
+    <div class="markdown-section">
+      <div class="markdown-toolbar">
+        <span class="markdown-toolbar-label">Body</span>
+        <button
+          class="source-toggle"
+          :class="{ active: showSource }"
+          :disabled="markdown == null"
+          @click="showSource = !showSource"
+        >{{ showSource ? 'Show rendered' : 'Show source' }}</button>
+      </div>
+      <div v-if="loading" style="color:var(--muted);padding:20px;text-align:center;">Loading…</div>
+      <div v-else-if="markdown == null" style="color:var(--muted-2);font-style:italic;padding:20px;text-align:center;border:1px dashed var(--hairline);border-radius:6px;">File not found or empty.</div>
+      <pre v-else-if="showSource" class="markdown-source">{{ markdown }}</pre>
+      <div v-else v-html="renderMarkdown(markdown, { variant: 'body' })"></div>
+    </div>
+
+    <div v-if="memory.anchors && memory.anchors.length" class="detail-section-divider" id="anchors-section">
+      <span>Anchors</span><span class="count">{{ memory.anchors.length }}</span>
+    </div>
+    <div v-if="memory.anchors && memory.anchors.length" class="anchor-list">
+      <button
+        v-for="a in memory.anchors"
+        :key="a.path + ':' + a.line"
+        class="anchor-link"
+        :disabled="a.exists === false"
+        :title="a.exists === false ? 'File no longer exists' : 'Open in editor'"
+      >
+        <span class="anchor-icon">
+          <svg viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linejoin="round" stroke-linecap="round"><path d="M3.5 2h6l3 3v9a1 1 0 0 1-1 1h-8a1 1 0 0 1-1-1V3a1 1 0 0 1 1-1z"/><path d="M9.5 2v3h3"/></svg>
+        </span>
+        <span class="anchor-path">{{ a.path }}</span>
+        <span class="anchor-line" v-if="a.line">:{{ a.line }}</span>
+      </button>
+    </div>
+
+    <div class="detail-actions">
+      <button class="btn" @click="router.push('/memory')">Back</button>
+      <button class="btn" :class="memory.archived ? 'primary' : 'danger'" @click="handleArchive">
+        {{ memory.archived ? 'Restore' : 'Archive' }}
+      </button>
+    </div>
+  </div>
 </template>

app/renderer/src/views/SessionDetail.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { ref, computed, onMounted, nextTick, onActivated } from 'vue';
+import { ref, computed, onMounted, nextTick, onActivated, watch } from 'vue';
 import { useRouter } from 'vue-router';
 import { state, FOLDER_SVG } from '../store.js';
 import { loadSessionDetail, isTextTruncated, loadFullText } from '../data.js';
@@ -27,18 +27,24 @@ const showBackToTop = ref(false);
 const wrapRef = ref(null);
 const detailRef = ref(null);
 
-// --- Load session on mount ---
+// --- Load session on mount or when id changes ---
 onMounted(async () => {
   await loadMessages();
 });
 
-// When keep-alive re-activates, re-check if we need data
 onActivated(async () => {
   if (messages.value.length === 0 && props.id) {
     await loadMessages();
   }
 });
 
+watch(() => props.id, async (newId, oldId) => {
+  if (newId && newId !== oldId) {
+    messages.value = [];
+    await loadMessages();
+  }
+});
+
 async function loadMessages() {
   if (!props.id) return;
   loading.value = true;
@@ -181,7 +187,9 @@ function getToolCallParsedInput(tc) {
           </div>
           <div class="session-title">{{ session.title || '(untitled)' }}</div>
           <div class="session-meta-inline">
-            <span>{{ fmtRelative(new Date(session.started_at || 0).getTime()) }}</span>
+            <span>created {{ fmtRelative(new Date(session.started_at || 0).getTime()) }}</span>
+            <span class="dot"></span>
+            <span>last active {{ fmtRelative(new Date(session.ended_at || session.started_at || 0).getTime()) }}</span>
             <span class="dot"></span>
             <span>{{ session.message_count || 0 }} messages</span>
             <template v-if="session.git_branch">

app/renderer/src/views/SessionList.vue

@@ -2,7 +2,7 @@
 import { computed } from 'vue';
 import { useRouter } from 'vue-router';
 import { state } from '../store.js';
-import { highlightPlain, escapeHTML, formatProjectLabel, fmtListTime } from '../utils.js';
+import { highlightPlain, escapeHTML, formatProjectLabel, fmtListTime, fmtRelative } from '../utils.js';
 
 defineOptions({ name: 'SessionList' });
 
@@ -22,8 +22,8 @@ const visibleSessions = computed(() => {
     })
     .filter(Boolean)
     .sort((a, b) => {
-      const ta = new Date(a.started_at || 0).getTime();
+      const ta = new Date(a.ended_at || a.started_at || 0).getTime();
-      const tb = new Date(b.started_at || 0).getTime();
+      const tb = new Date(b.ended_at || b.started_at || 0).getTime();
       return state.sortDesc ? tb - ta : ta - tb;
     });
 });
@@ -39,13 +39,44 @@ function projectLabel(session) {
 }
 
 function timeLabel(session) {
-  const ts = new Date(session.started_at || 0).getTime();
+  const ts = new Date(session.ended_at || session.started_at || 0).getTime();
   return fmtListTime(ts);
 }
 
+function lastActiveLabel(session) {
+  const ts = new Date(session.ended_at || session.started_at || 0).getTime();
+  return fmtListTime(ts);
+}
+
+function createdLabel(session) {
+  const ts = new Date(session.started_at || 0).getTime();
+  return fmtRelative(ts);
+}
+
 function openSession(session) {
   router.push({ name: 'SessionDetail', params: { id: session.id } });
 }
+
+function obeliskStyle(session) {
+  const created = new Date(session.started_at || 0).getTime();
+  const days = Math.max(0, (Date.now() - created) / 86400000);
+  const height = Math.min(1, Math.log(1 + days) / Math.log(1 + 365));
+
+  let color;
+  if (days < 7) color = '#a855f7';
+  else if (days < 30) color = '#6366f1';
+  else if (days < 90) color = '#64748b';
+  else color = '#475569';
+
+  const glow = days < 7 ? `0 0 4px ${color}` : 'none';
+  const maxHeight = 36; // px, roughly the row height minus padding
+
+  return {
+    height: `${Math.max(4, Math.round(height * maxHeight))}px`,
+    background: color,
+    boxShadow: glow,
+  };
+}
 </script>
 
 <template>
@@ -63,6 +94,7 @@ function openSession(session) {
         :data-session-id="s.id"
         @click="openSession(s)"
       >
+        <div class="srow-obelisk" :style="obeliskStyle(s)"></div>
         <div class="srow-body">
           <div class="srow-title" v-html="titleHTML(s)"></div>
           <div class="srow-meta">

app/renderer/src/views/SubagentDetail.vue

@@ -1,8 +1,142 @@
 <script setup>
+import { ref, onMounted, watch, computed } from 'vue';
+import { useRouter } from 'vue-router';
+import { state } from '../store.js';
+import { loadSubagentDetail, isTextTruncated, loadFullText } from '../data.js';
+import { escapeHTML, fmtClockTime, renderMarkdown } from '../utils.js';
+
 defineOptions({ name: 'SubagentDetail' });
-defineProps({ id: String, agentId: String });
+const props = defineProps({ id: String, agentId: String });
+const router = useRouter();
+
+const messages = ref([]);
+const loading = ref(false);
+
+const parentSession = computed(() => state.sessions.find(s => s.id === props.id));
+
+onMounted(async () => { await load(); });
+watch(() => props.agentId, async (n, o) => { if (n && n !== o) { messages.value = []; await load(); } });
+
+async function load() {
+  if (!props.agentId) return;
+  loading.value = true;
+  try {
+    messages.value = await loadSubagentDetail(props.agentId);
+  } finally { loading.value = false; }
+}
+
+function goBack() {
+  router.push(`/sessions/${props.id}`);
+}
+
+async function handleLoadFull(uuid, el) {
+  const full = await loadFullText(uuid);
+  if (full && el) {
+    const body = el.closest('.msg')?.querySelector('.markdown-msg, .markdown-compact');
+    if (body) body.outerHTML = renderMarkdown(full, { variant: 'msg' });
+    el.remove();
+  }
+}
 </script>
 
 <template>
-  <div class="view-placeholder">SubagentDetail view for agent {{ agentId }} in session {{ id }} (TODO)</div>
+  <div class="session-detail-wrap" ref="wrapRef">
+    <div class="detail-wide">
+      <div class="session-header">
+        <div class="session-eyebrow">
+          <span style="font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:0.05em;">Subagent</span>
+        </div>
+        <div class="session-title">{{ agentId }}</div>
+        <div class="session-meta-inline">
+          <span>{{ messages.length }} messages</span>
+        </div>
+      </div>
+
+      <div v-if="loading" class="empty">Loading…</div>
+
+      <div v-else class="timeline">
+        <div
+          v-for="(msg, idx) in messages"
+          :key="msg.uuid"
+          class="msg"
+          :class="[msg.type === 'user' ? 'user' : 'assistant']"
+          :data-uuid="msg.uuid"
+        >
+          <!-- Thinking -->
+          <template v-if="msg.content_type === 'thinking'">
+            <div class="msg-thinking">
+              <button class="thinking-toggle" @click="$event.currentTarget.closest('.msg-thinking').classList.toggle('open')">
+                <svg class="chevron" viewBox="0 0 8 8" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><path d="M2.5 1.5l3 2.5-3 2.5"/></svg>
+                <span class="thinking-label">Thinking</span>
+              </button>
+              <div class="thinking-body" v-html="renderMarkdown(msg.text, { variant: 'msg' })"></div>
+            </div>
+          </template>
+
+          <!-- Meta -->
+          <template v-else-if="msg.is_meta">
+            <div class="msg-meta-collapsed">
+              <button class="meta-toggle" @click="$event.currentTarget.closest('.msg-meta-collapsed').classList.toggle('open')">
+                <svg class="chevron" viewBox="0 0 8 8" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><path d="M2.5 1.5l3 2.5-3 2.5"/></svg>
+                <span class="meta-label">System</span>
+                <span class="meta-preview">{{ (msg.text || '').replace(/<[^>]+>/g, '').slice(0, 80) }}</span>
+              </button>
+              <div class="meta-body" v-html="renderMarkdown(msg.text, { variant: 'compact' })"></div>
+            </div>
+          </template>
+
+          <!-- Normal message -->
+          <template v-else>
+            <div class="msg-head">
+              <span class="role">{{ msg.type === 'user' ? 'Prompt' : 'Assistant' }}</span>
+              <span class="when">{{ msg.timestamp ? fmtClockTime(msg.timestamp) : '' }}</span>
+            </div>
+            <div v-if="msg._thinking" class="msg-thinking">
+              <button class="thinking-toggle" @click="$event.currentTarget.closest('.msg-thinking').classList.toggle('open')">
+                <svg class="chevron" viewBox="0 0 8 8" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><path d="M2.5 1.5l3 2.5-3 2.5"/></svg>
+                <span class="thinking-label">Thinking</span>
+              </button>
+              <div class="thinking-body" v-html="renderMarkdown(msg._thinking, { variant: 'msg' })"></div>
+            </div>
+            <div v-if="msg.text" v-html="renderMarkdown(msg.text, { variant: 'msg' })"></div>
+            <div v-else-if="!msg.tool_calls?.length" class="msg-text empty-text">(no text content)</div>
+            <button
+              v-if="isTextTruncated(msg.text)"
+              class="truncated-btn"
+              @click="handleLoadFull(msg.uuid, $event.currentTarget)"
+            >Message truncated — click to load full text</button>
+
+            <!-- Tool calls -->
+            <div v-if="msg.tool_calls?.length" class="msg-tools">
+              <div v-for="tc in msg.tool_calls" :key="tc.id" class="msg-tool" :class="{ 'is-error': tc.result?.is_error }">
+                <button class="toolcall-toggle" @click="$event.currentTarget.closest('.msg-tool').classList.toggle('open')">
+                  <svg class="chevron" viewBox="0 0 8 8" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><path d="M2.5 1.5l3 2.5-3 2.5"/></svg>
+                  <span class="tool-name">{{ tc.name }}</span>
+                  <span class="tool-arg">{{ getToolArgPreview(tc) }}</span>
+                  <span v-if="tc.result?.is_error" class="tool-error">error</span>
+                </button>
+                <div class="toolcall-body">
+                  <div class="tc-section">Input</div>
+                  <pre>{{ tc.input_json }}</pre>
+                  <template v-if="tc.result">
+                    <div class="tc-section">{{ tc.result.is_error ? 'Error' : 'Output' }}</div>
+                    <pre>{{ tc.result.content || '(empty)' }}</pre>
+                  </template>
+                </div>
+              </div>
+            </div>
+          </template>
+        </div>
+      </div>
+    </div>
+  </div>
 </template>
+
+<script>
+function getToolArgPreview(tc) {
+  try {
+    const j = JSON.parse(tc.input_json || '{}');
+    return j.file_path || j.command || j.path || j.description || JSON.stringify(j).slice(0, 100);
+  } catch { return (tc.input_json || '').slice(0, 100); }
+}
+</script>

app/renderer/styles/list.css

@@ -116,6 +116,10 @@
     content: ''; position: absolute; left: 0; top: 0; bottom: 0;
     width: 2px; background: var(--muted-2);
   }
+  .srow-obelisk {
+    position: absolute; left: 0; bottom: 0;
+    width: 3px; border-radius: 1.5px 1.5px 0 0;
+  }
   .srow-body { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
   .srow-title {
     font-size: var(--text-md); font-weight: 500; color: var(--fg);
@@ -146,7 +150,9 @@
     color: var(--fg-2); text-align: right;
     font-variant-numeric: tabular-nums;
     flex-shrink: 0; padding-top: 2px; white-space: nowrap;
+    display: flex; flex-direction: column; gap: 2px;
   }
+  .srow-right .srow-created { font-size: 10px; color: var(--muted); }
 
   .empty {
     flex: 1; display: flex; align-items: center; justify-content: center;

app/renderer/styles/sidebar.css

@@ -34,7 +34,7 @@
 .sidebar-search input::placeholder { color: var(--muted-2); }
 .sidebar-search input:focus { outline: 0; border-color: var(--accent); background: var(--surface-strong); }
 .sidebar-search-icon {
-  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
+  position: absolute; left: 14px; top: 12px; transform: translateY(-50%);
   width: 11px; height: 11px; color: var(--muted); pointer-events: none;
 }
 .sidebar-list { overflow-y: auto; padding: 2px 0 8px; flex: 1; min-height: 0; }

app/renderer/styles/toolbar.css

@@ -15,7 +15,7 @@
     cursor: pointer; transition: all 0.1s;
     display: inline-flex; align-items: center; gap: 6px;
     line-height: 1; border: 0; background: transparent;
-    white-space: nowrap;
+    white-space: nowrap; text-decoration: none;
   }
   .crumb:hover { background: var(--surface-strong); color: var(--fg-2); }
   .crumb.terminal { color: var(--fg); font-weight: 600; cursor: default; }

references/schema.md

@@ -3,6 +3,9 @@
 Advanced reference for the obelisk database.
 Read this when `search()`, `context()`, or `sql()` are not enough.
 
+Executable schema source: `scripts/schema.sql`. This document explains that
+contract for agents and humans; it is not the runtime source of truth.
+
 ---
 
 ## 1. Database Schema
@@ -215,6 +218,14 @@ CREATE TABLE index_state (
 );
 ```
 
+Sentinel rows use synthetic `jsonl_path` keys:
+`__last_build__` stores the last completed build time, `__app_heartbeat__`
+stores the optional app indexer's liveness heartbeat,
+`__app_last_successful_build__` stores the app's last successful index build,
+`__indexer_owner_app__` marks app ownership, and `__last_source_mtime__` records
+the newest indexed source mtime. Skill-side lazy builds skip work only while the
+app heartbeat and app successful-build marker are both fresh.
+
 ### memories
 
 Human-approved markdown memory records registered in Obelisk. The markdown

scripts/db.mjs

@@ -8,66 +8,7 @@ const { DatabaseSync } = require('node:sqlite');
 const CLAUDE_DIR = path.join(os.homedir(), '.claude');
 const DB_PATH = path.join(CLAUDE_DIR, 'obelisk.sqlite');
 const TEXT_LIMIT = 10000;
-
+const SCHEMA = fs.readFileSync(new URL('./schema.sql', import.meta.url), 'utf8');
-const SCHEMA = `
-CREATE TABLE IF NOT EXISTS sessions (
-  id TEXT PRIMARY KEY, title TEXT, project TEXT, project_path TEXT,
-  started_at TEXT, ended_at TEXT, git_branch TEXT, version TEXT,
-  message_count INTEGER DEFAULT 0, jsonl_path TEXT);
-CREATE TABLE IF NOT EXISTS messages (
-  uuid TEXT PRIMARY KEY, session_id TEXT, type TEXT, parent_uuid TEXT,
-  timestamp TEXT, role TEXT, text TEXT, content_type TEXT,
-  is_meta INTEGER DEFAULT 0, model TEXT,
-  is_sidechain INTEGER DEFAULT 0, agent_id TEXT,
-  input_tokens INTEGER, output_tokens INTEGER,
-  cwd TEXT, skill TEXT, turn_duration_ms INTEGER);
-CREATE TABLE IF NOT EXISTS tool_calls (
-  id TEXT PRIMARY KEY, message_uuid TEXT, session_id TEXT,
-  name TEXT, input_json TEXT, file_path TEXT);
-CREATE TABLE IF NOT EXISTS tool_results (
-  tool_use_id TEXT PRIMARY KEY, message_uuid TEXT, session_id TEXT,
-  content TEXT, file_path TEXT, is_error INTEGER DEFAULT 0);
-CREATE TABLE IF NOT EXISTS subagents (
-  agent_id TEXT PRIMARY KEY, session_id TEXT, parent_tool_use_id TEXT,
-  agent_type TEXT, description TEXT, duration_ms INTEGER, total_tokens INTEGER);
-CREATE TABLE IF NOT EXISTS workflows (
-  run_id TEXT PRIMARY KEY, session_id TEXT, task_id TEXT,
-  script TEXT, result_json TEXT, timestamp TEXT, agent_count INTEGER DEFAULT 0,
-  duration_ms INTEGER, total_tokens INTEGER, status TEXT, workflow_name TEXT);
-CREATE TABLE IF NOT EXISTS workflow_agents (
-  agent_id TEXT PRIMARY KEY, run_id TEXT, session_id TEXT,
-  agent_type TEXT, description TEXT,
-  phase TEXT, label TEXT, model TEXT, state TEXT,
-  duration_ms INTEGER, tokens INTEGER, tool_calls INTEGER);
-CREATE TABLE IF NOT EXISTS index_state (
-  jsonl_path TEXT PRIMARY KEY, mtime REAL, lines_processed INTEGER);
-CREATE TABLE IF NOT EXISTS summaries (
-  id TEXT PRIMARY KEY, session_id TEXT, timestamp TEXT,
-  source TEXT, content TEXT);
-CREATE VIRTUAL TABLE IF NOT EXISTS messages_fts USING fts5(
-  uuid UNINDEXED, session_id UNINDEXED, text, content=messages, content_rowid=rowid);
-CREATE INDEX IF NOT EXISTS idx_messages_session ON messages(session_id);
-CREATE INDEX IF NOT EXISTS idx_messages_agent ON messages(agent_id);
-CREATE INDEX IF NOT EXISTS idx_messages_ts ON messages(session_id, timestamp);
-CREATE INDEX IF NOT EXISTS idx_tc_session_name ON tool_calls(session_id, name);
-CREATE INDEX IF NOT EXISTS idx_tc_file ON tool_calls(file_path);
-CREATE INDEX IF NOT EXISTS idx_sa_session ON subagents(session_id);
-CREATE INDEX IF NOT EXISTS idx_wf_session ON workflows(session_id);
-CREATE INDEX IF NOT EXISTS idx_wa_run ON workflow_agents(run_id);
-CREATE INDEX IF NOT EXISTS idx_summaries_session ON summaries(session_id);
-CREATE TABLE IF NOT EXISTS memories (
-  id TEXT PRIMARY KEY, session_id TEXT, project TEXT,
-  message_start TEXT, message_end TEXT,
-  path TEXT, anchors TEXT, summary TEXT, created_at TEXT,
-  deleted_at TEXT, deleted_reason TEXT);
-CREATE VIRTUAL TABLE IF NOT EXISTS memories_fts USING fts5(
-  id UNINDEXED, path, summary,
-  content=memories, content_rowid=rowid,
-  tokenize='unicode61 remove_diacritics 1');
-CREATE INDEX IF NOT EXISTS idx_memories_project ON memories(project);
-CREATE INDEX IF NOT EXISTS idx_memories_session ON memories(session_id);
-CREATE INDEX IF NOT EXISTS idx_memories_created ON memories(created_at);
-`;
 
 function openDb() {
   const db = new DatabaseSync(DB_PATH);

scripts/indexer.mjs

@@ -246,12 +246,29 @@ function indexHistory(db) {
 }
 
 const BUILD_DEBOUNCE_MS = 30000;
+const APP_HEARTBEAT_FRESH_MS = 60000;
+
+function shouldSkipBuild(db, { now = Date.now() } = {}) {
+  const appHeartbeat = db.prepare("SELECT mtime FROM index_state WHERE jsonl_path='__app_heartbeat__'").get();
+  const appSuccessfulBuild = db.prepare("SELECT mtime FROM index_state WHERE jsonl_path='__app_last_successful_build__'").get();
+  if (
+    appHeartbeat && now - appHeartbeat.mtime < APP_HEARTBEAT_FRESH_MS &&
+    appSuccessfulBuild && now - appSuccessfulBuild.mtime < APP_HEARTBEAT_FRESH_MS
+  ) {
+    return { skip: true, reason: 'app_successful_build' };
+  }
+  const last = db.prepare("SELECT mtime FROM index_state WHERE jsonl_path='__last_build__'").get();
+  if (last && now - last.mtime < BUILD_DEBOUNCE_MS) {
+    return { skip: true, reason: 'recent_build' };
+  }
+  return { skip: false };
+}
 
 function buildIndex({ force = false } = {}) {
   const db = openDb();
   if (!force) {
-    const last = db.prepare("SELECT mtime FROM index_state WHERE jsonl_path='__last_build__'").get();
+    const skip = shouldSkipBuild(db);
-    if (last && Date.now() - last.mtime < BUILD_DEBOUNCE_MS) { db.close(); return; }
+    if (skip.skip) { db.close(); return; }
   }
 
   if (force) {
@@ -286,4 +303,4 @@ function buildIndex({ force = false } = {}) {
   db.close();
 }
 
-export { buildIndex, inferProjectPath, refreshSessionProjectPaths };
+export { buildIndex, inferProjectPath, refreshSessionProjectPaths, shouldSkipBuild };

scripts/schema.sql

@@ -0,0 +1,57 @@
+CREATE TABLE IF NOT EXISTS sessions (
+  id TEXT PRIMARY KEY, title TEXT, project TEXT, project_path TEXT,
+  started_at TEXT, ended_at TEXT, git_branch TEXT, version TEXT,
+  message_count INTEGER DEFAULT 0, jsonl_path TEXT);
+CREATE TABLE IF NOT EXISTS messages (
+  uuid TEXT PRIMARY KEY, session_id TEXT, type TEXT, parent_uuid TEXT,
+  timestamp TEXT, role TEXT, text TEXT, content_type TEXT,
+  is_meta INTEGER DEFAULT 0, model TEXT,
+  is_sidechain INTEGER DEFAULT 0, agent_id TEXT,
+  input_tokens INTEGER, output_tokens INTEGER,
+  cwd TEXT, skill TEXT, turn_duration_ms INTEGER);
+CREATE TABLE IF NOT EXISTS tool_calls (
+  id TEXT PRIMARY KEY, message_uuid TEXT, session_id TEXT,
+  name TEXT, input_json TEXT, file_path TEXT);
+CREATE TABLE IF NOT EXISTS tool_results (
+  tool_use_id TEXT PRIMARY KEY, message_uuid TEXT, session_id TEXT,
+  content TEXT, file_path TEXT, is_error INTEGER DEFAULT 0);
+CREATE TABLE IF NOT EXISTS subagents (
+  agent_id TEXT PRIMARY KEY, session_id TEXT, parent_tool_use_id TEXT,
+  agent_type TEXT, description TEXT, duration_ms INTEGER, total_tokens INTEGER);
+CREATE TABLE IF NOT EXISTS workflows (
+  run_id TEXT PRIMARY KEY, session_id TEXT, task_id TEXT,
+  script TEXT, result_json TEXT, timestamp TEXT, agent_count INTEGER DEFAULT 0,
+  duration_ms INTEGER, total_tokens INTEGER, status TEXT, workflow_name TEXT);
+CREATE TABLE IF NOT EXISTS workflow_agents (
+  agent_id TEXT PRIMARY KEY, run_id TEXT, session_id TEXT,
+  agent_type TEXT, description TEXT,
+  phase TEXT, label TEXT, model TEXT, state TEXT,
+  duration_ms INTEGER, tokens INTEGER, tool_calls INTEGER);
+CREATE TABLE IF NOT EXISTS index_state (
+  jsonl_path TEXT PRIMARY KEY, mtime REAL, lines_processed INTEGER);
+CREATE TABLE IF NOT EXISTS summaries (
+  id TEXT PRIMARY KEY, session_id TEXT, timestamp TEXT,
+  source TEXT, content TEXT);
+CREATE VIRTUAL TABLE IF NOT EXISTS messages_fts USING fts5(
+  uuid UNINDEXED, session_id UNINDEXED, text, content=messages, content_rowid=rowid);
+CREATE INDEX IF NOT EXISTS idx_messages_session ON messages(session_id);
+CREATE INDEX IF NOT EXISTS idx_messages_agent ON messages(agent_id);
+CREATE INDEX IF NOT EXISTS idx_messages_ts ON messages(session_id, timestamp);
+CREATE INDEX IF NOT EXISTS idx_tc_session_name ON tool_calls(session_id, name);
+CREATE INDEX IF NOT EXISTS idx_tc_file ON tool_calls(file_path);
+CREATE INDEX IF NOT EXISTS idx_sa_session ON subagents(session_id);
+CREATE INDEX IF NOT EXISTS idx_wf_session ON workflows(session_id);
+CREATE INDEX IF NOT EXISTS idx_wa_run ON workflow_agents(run_id);
+CREATE INDEX IF NOT EXISTS idx_summaries_session ON summaries(session_id);
+CREATE TABLE IF NOT EXISTS memories (
+  id TEXT PRIMARY KEY, session_id TEXT, project TEXT,
+  message_start TEXT, message_end TEXT,
+  path TEXT, anchors TEXT, summary TEXT, created_at TEXT,
+  deleted_at TEXT, deleted_reason TEXT);
+CREATE VIRTUAL TABLE IF NOT EXISTS memories_fts USING fts5(
+  id UNINDEXED, path, summary,
+  content=memories, content_rowid=rowid,
+  tokenize='unicode61 remove_diacritics 1');
+CREATE INDEX IF NOT EXISTS idx_memories_project ON memories(project);
+CREATE INDEX IF NOT EXISTS idx_memories_session ON memories(session_id);
+CREATE INDEX IF NOT EXISTS idx_memories_created ON memories(created_at);