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126151dccd
Critical fixes: - Lock file TOCTOU race condition: Use atomic O_CREAT|O_EXCL for lock creation - PID reuse vulnerability on Windows: Store PID:CREATE_TIME in lock file to detect when a different process has reused the same PID - WAL mode on network drives: Detect network paths (UNC, mapped drives, NFS, CIFS) and fall back to DELETE journal mode to prevent corruption High priority fixes: - JSON migration now preserves dependencies field during legacy migration - Process tree termination on Windows: Use psutil to kill child processes recursively to prevent orphaned browser instances - Retry backoff jitter: Add random 30% jitter to prevent synchronized retries under high contention with 5 concurrent agents Files changed: - server/services/process_manager.py: Atomic lock creation, PID+create_time - api/database.py: Network filesystem detection for WAL mode fallback - api/migration.py: Add dependencies field to JSON migration - parallel_orchestrator.py: _kill_process_tree helper function - mcp_server/feature_mcp.py: Add jitter to exponential backoff Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>