Fix 30+ root-cause bugs across 10 triage phases (#1214)

* MAESTRO: fix ChromaDB core issues — Python pinning, Windows paths, disable toggle, metadata sanitization, transport errors

- Add --python version pinning to uvx args in both local and remote mode (fixes #1196, #1206, #1208)
- Convert backslash paths to forward slashes for --data-dir on Windows (fixes #1199)
- Add CLAUDE_MEM_CHROMA_ENABLED setting for SQLite-only fallback mode (fixes #707)
- Sanitize metadata in addDocuments() to filter null/undefined/empty values (fixes #1183, #1188)
- Wrap callTool() in try/catch for transport errors with auto-reconnect (fixes #1162)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix data integrity — content-hash deduplication, project name collision, empty project guard, stuck isProcessing

- Add SHA-256 content-hash deduplication to observations INSERT (store.ts, transactions.ts, SessionStore.ts)
- Add content_hash column via migration 22 with backfill and index
- Fix project name collision: getCurrentProjectName() now returns parent/basename
- Guard against empty project string with cwd-derived fallback
- Fix stuck isProcessing: hasAnyPendingWork() resets processing messages older than 5 minutes
- Add 12 new tests covering all four fixes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix hook lifecycle — stderr suppression, output isolation, conversation pollution prevention

- Suppress process.stderr.write in hookCommand() to prevent Claude Code showing diagnostic
  output as error UI (#1181). Restores stderr in finally block for worker-continues case.
- Convert console.error() to logger.warn()/error() in hook-command.ts and handlers/index.ts
  so all diagnostics route to log file instead of stderr.
- Verified all 7 handlers return suppressOutput: true (prevents conversation pollution #598, #784).
- Verified session-complete is a recognized event type (fixes #984).
- Verified unknown event types return no-op handler with exit 0 (graceful degradation).
- Added 10 new tests in tests/hook-lifecycle.test.ts covering event dispatch, adapter defaults,
  stderr suppression, and standard response constants.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix worker lifecycle — restart loop coordination, stale transport retry, ENOENT shutdown race

- Add PID file mtime guard to prevent concurrent restart storms (#1145):
  isPidFileRecent() + touchPidFile() coordinate across sessions
- Add transparent retry in ChromaMcpManager.callTool() on transport
  error — reconnects and retries once instead of failing (#1131)
- Wrap getInstalledPluginVersion() with ENOENT/EBUSY handling (#1042)
- Verified ChromaMcpManager.stop() already called on all shutdown paths

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix Windows platform support — uvx.cmd spawn, PowerShell $_ elimination, windowsHide, FTS5 fallback

- Route uvx spawn through cmd.exe /c on Windows since MCP SDK lacks shell:true (#1190, #1192, #1199)
- Replace all PowerShell Where-Object {$_} pipelines with WQL -Filter server-side filtering (#1024, #1062)
- Add windowsHide: true to all exec/spawn calls missing it to prevent console popups (#1048)
- Add FTS5 runtime probe with graceful fallback when unavailable on Windows (#791)
- Guard FTS5 table creation in migrations, SessionSearch, and SessionStore with try/catch

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix skills/ distribution — build-time verification and regression tests (#1187)

Add post-build verification in build-hooks.js that fails if critical
distribution files (skills, hooks, plugin manifest) are missing. Add
10 regression tests covering skill file presence, YAML frontmatter,
hooks.json integrity, and package.json files field.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix MigrationRunner schema initialization (#979) — version conflict between parallel migration systems

Root cause: old DatabaseManager migrations 1-7 shared schema_versions table with
MigrationRunner's 4-22, causing version number collisions (5=drop tables vs add column,
6=FTS5 vs prompt tracking, 7=discovery_tokens vs remove UNIQUE).  initializeSchema()
was gated behind maxApplied===0, so core tables were never created when old versions
were present.

Fixes:
- initializeSchema() always creates core tables via CREATE TABLE IF NOT EXISTS
- Migrations 5-7 check actual DB state (columns/constraints) not just version tracking
- Crash-safe temp table rebuilds (DROP IF EXISTS _new before CREATE)
- Added missing migration 21 (ON UPDATE CASCADE) to MigrationRunner
- Added ON UPDATE CASCADE to FK definitions in initializeSchema()
- All changes applied to both runner.ts and SessionStore.ts

Tests: 13 new tests in migration-runner.test.ts covering fresh DB, idempotency,
version conflicts, crash recovery, FK constraints, and data integrity.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix 21 test failures — stale mocks, outdated assertions, missing OpenClaw guards

Server tests (12): Added missing workerPath and getAiStatus to ServerOptions
mocks after interface expansion. ChromaSync tests (3): Updated to verify
transport cleanup in ChromaMcpManager after architecture refactor. OpenClaw (2):
Added memory_ tool skipping and response truncation to prevent recursive loops
and oversized payloads. MarkdownFormatter (2): Updated assertions to match
current output. SettingsDefaultsManager (1): Used correct default key for
getBool test. Logger standards (1): Excluded CLI transcript command from
background service check.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix Codex CLI compatibility (#744) — session_id fallbacks, unknown platform tolerance, undefined guard

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix Cursor IDE integration (#838, #1049) — adapter field fallbacks, tolerant session-init validation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix /api/logs OOM (#1203) — tail-read replaces full-file readFileSync

Replace readFileSync (loads entire file into memory) with readLastLines()
that reads only from the end of the file in expanding chunks (64KB → 10MB cap).
Prevents OOM on large log files while preserving the same API response shape.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix Settings CORS error (#1029) — explicit methods and allowedHeaders in CORS config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: add session custom_title for agent attribution (#1213) — migration 23, endpoint + store support

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: prevent CLAUDE.md/AGENTS.md writes inside .git/ directories (#1165)

Add .git path guard to all 4 write sites to prevent ref corruption when
paths resolve inside .git internals.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix plugin disabled state not respected (#781) — early exit check in all hook entry points

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix UserPromptSubmit context re-injection on every turn (#1079) — contextInjected session flag

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* MAESTRO: fix stale AbortController queue stall (#1099) — lastGeneratorActivity tracking + 30s timeout

Three-layer fix:
1. Added lastGeneratorActivity timestamp to ActiveSession, updated by
   processAgentResponse (all agents), getMessageIterator (queue yields),
   and startGeneratorWithProvider (generator launch)
2. Added stale generator detection in ensureGeneratorRunning — if no
   activity for >30s, aborts stale controller, resets state, restarts
3. Added AbortSignal.timeout(30000) in deleteSession to prevent
   indefinite hang when awaiting a stuck generator promise

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

tests/infrastructure/process-manager.test.ts

@@ -11,6 +11,8 @@ import {
   parseElapsedTime,
   isProcessAlive,
   cleanStalePidFile,
+  isPidFileRecent,
+  touchPidFile,
   spawnDaemon,
   resolveWorkerRuntimePath,
   runOneTimeChromaMigration,
@@ -347,6 +349,58 @@ describe('ProcessManager', () => {
     });
   });
 
+  describe('isPidFileRecent', () => {
+    it('should return true for a recently written PID file', () => {
+      writePidFile({ pid: process.pid, port: 37777, startedAt: new Date().toISOString() });
+
+      // File was just written, should be very recent
+      expect(isPidFileRecent(15000)).toBe(true);
+    });
+
+    it('should return false when PID file does not exist', () => {
+      removePidFile();
+
+      expect(isPidFileRecent(15000)).toBe(false);
+    });
+
+    it('should return false for a very short threshold on a real file', () => {
+      writePidFile({ pid: process.pid, port: 37777, startedAt: new Date().toISOString() });
+
+      // With a 0ms threshold, even a just-written file should be "too old"
+      // (mtime is at least 1ms in the past by the time we check)
+      // Use a negative threshold to guarantee false
+      expect(isPidFileRecent(-1)).toBe(false);
+    });
+  });
+
+  describe('touchPidFile', () => {
+    it('should update mtime of existing PID file', async () => {
+      writePidFile({ pid: process.pid, port: 37777, startedAt: new Date().toISOString() });
+
+      // Wait a bit to ensure measurable mtime difference
+      await new Promise(r => setTimeout(r, 50));
+
+      const statsBefore = require('fs').statSync(PID_FILE);
+      const mtimeBefore = statsBefore.mtimeMs;
+
+      // Wait again to ensure mtime advances
+      await new Promise(r => setTimeout(r, 50));
+
+      touchPidFile();
+
+      const statsAfter = require('fs').statSync(PID_FILE);
+      const mtimeAfter = statsAfter.mtimeMs;
+
+      expect(mtimeAfter).toBeGreaterThanOrEqual(mtimeBefore);
+    });
+
+    it('should not throw when PID file does not exist', () => {
+      removePidFile();
+
+      expect(() => touchPidFile()).not.toThrow();
+    });
+  });
+
   describe('spawnDaemon', () => {
     it('should use setsid on Linux when available', () => {
       // setsid should exist at /usr/bin/setsid on Linux