Auto d8a8c83447 fix: prevent SQLite corruption in parallel mode with atomic operations ...

Replace ineffective threading.Lock() with atomic SQL operations for
cross-process safety. Key changes:

- Add SQLAlchemy event hooks (do_connect/do_begin) for BEGIN IMMEDIATE
  transactions in api/database.py
- Add atomic_transaction() context manager for multi-statement ops
- Convert all feature MCP write operations to atomic UPDATE...WHERE
  with compare-and-swap patterns (feature_claim, mark_passing, etc.)
- Add WHERE passes=0 state guard to feature_mark_passing
- Add WAL checkpoint on shutdown and idempotent cleanup() in
  parallel_orchestrator.py with async-safe signal handling
- Wrap SQLite connections with contextlib.closing() in progress.py
- Add thread-safe engine cache with double-checked locking in
  assistant_database.py
- Migrate to SQLAlchemy 2.0 DeclarativeBase across all modules

Inspired by PR #108 (cabana8471-arch), with fixes for nested
BEGIN EXCLUSIVE bug and missing state guards.

Closes #106

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-02-01 09:45:20 +02:00

..

__init__.py

init

2025-12-30 11:13:18 +02:00

feature_mcp.py

fix: prevent SQLite corruption in parallel mode with atomic operations

2026-02-01 09:45:20 +02:00