- Implemented 3-tier release feed status (MANIFEST_LIVE, PACKAGE_LIVE, PACKAGE_HASH_VERIFIED)
- Added reproducible package and checksum builder in scripts/build_dist.py
- Preserved user header comments across YAML saves in router_config.py
- Connected model_timeout_seconds, monitoring_interval_seconds, and auto_monitoring to runtime
- Guarded global gemini:antigravity credential swap with _AGY_INVOCATION_LOCK to eliminate concurrent subprocess race
- Added concurrency regression test in tests/test_antigravity_concurrency.py
- Added interprocess file locking (_FileLock) for router_state.json in health_tracker.py
- Sandboxed APPDATA and USERPROFILE in tests/test_installer.py
- Exported roadmap modules in router/__init__.py
- Verified 151 passing tests (100%) and 7/7 release gate checks
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