db-lock-a.json

{
  "name": "db-lock-a",
  "pair": "db-lock",
  "phase": "A",
  "description": "Fix a sqlite3.OperationalError: database is locked error in an agent state manager.",
  "setup": {
    "repo_state": "agent_state.py using sqlite3.connect() without timeout",
    "error_message": "sqlite3.OperationalError: database is locked",
    "trigger": "concurrent access from two agent processes"
  },
  "expected_outcome": {
    "fix_approach": "add timeout parameter, use WAL mode, or implement retry with backoff",
    "lesson_generated": true,
    "lesson_fields": ["title", "domain", "problem", "root_cause", "solution", "verification"]
  },
  "validation": {
    "lesson_schema_valid": true,
    "lesson_mentions_wal_or_timeout": true,
    "fix_prevents_recurrence": true
  },
  "teaches": "SQLite concurrency pattern for agent state"
}