Files
codebase-memory-mcp/src
Shane McCarronandClaude Sonnet 4.6 8dd490b47c fix(store): keep WAL journal mode during bulk write to prevent DB corruption on crash
cbm_store_begin_bulk() was switching the SQLite journal mode from WAL to
MEMORY for write throughput.  If the process crashed mid-bulk-write the
in-memory rollback journal was lost, leaving the database file in a
partially-written, unrecoverable state.

WAL mode is inherently crash-safe: uncommitted WAL entries are discarded
on the next open.  The performance benefit of bulk mode is preserved via
synchronous=OFF and an enlarged cache_size, both of which are safe under
WAL.

Remove the PRAGMA journal_mode = MEMORY from cbm_store_begin_bulk and
the matching PRAGMA journal_mode = WAL from cbm_store_end_bulk.  Update
the header comments to reflect the new invariant.

Add tests/test_store_bulk.c with three tests:
- bulk_pragma_wal_invariant: asserts journal_mode remains "wal" after
  cbm_store_begin_bulk via an independent read-only connection
- bulk_pragma_end_wal_invariant: asserts journal_mode remains "wal" after
  cbm_store_end_bulk
- bulk_crash_recovery: forks a child that enters bulk mode, opens an
  explicit transaction, writes data, then calls _exit() without committing;
  the parent verifies the database opens cleanly and baseline data survives

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-19 17:21:48 -05:00
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