After a lost record the journal drops position-based records until a
full checkpoint. That checkpoint was only requested from later edits,
rate-limited to once a second; when the writer handled the failing
record before its edit asked for a checkpoint, the checkpoint failed as
well and consumed the slot, so edits made within the next second were
not recovered and, if the user stopped typing, the journal stayed behind
indefinitely. SwapManager::RetryGapCheckpoints(), called once per frame
from Editor::ProcessPendingOpens, requests it once the interval has
passed. This also made SwapReplay_LostRecord_ResyncsWithCheckpoint flaky
under load; the test now exercises the retry.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015rcVQiiWyTzoNrsvLSaAfB
- Replay recovers every complete record before a torn final record (the
normal result of a crash mid-append) and reports it through err,
instead of rejecting the whole journal. SwapReplay_TruncatedLog is
updated to the new behaviour.
- A record that cannot be written (open/write failure, breaker open)
marks the journal as having a gap. Later position-based records are
dropped until a checkpoint re-establishes the content; recorders
request one on the next edit (at most once per second).
- A failed append is truncated back off the file, and a failed header
write closes the file so the next attempt starts fresh.
- Inserts over the 24-bit record limit are split into consecutive
records; buffers too large to checkpoint are no longer snapshotted
and rejected on every checkpoint.
- Declining to delete an unreadable swap moves it to .corrupt so new
edits are not appended behind the bad data.
- NotifyFilenameChanged no longer writes a full checkpoint into the
journal it is about to delete.
Audit findings D7, P5.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015rcVQiiWyTzoNrsvLSaAfB
- Added detailed journaling system (`SwapManager`) for crash recovery, including edit recording and replay.
- Integrated recovery prompts for handling swap files during file open flows.
- Implemented swap file cleanup, checkpointing, and compaction mechanisms.
- Added extensive unit tests for swap-related behaviors such as recovery prompts, file pruning, and corruption handling.
- Updated CMake to include new test files.
- Introduced SwapManager for sidecar journaling of buffer mutations, with a safe recovery mechanism.
- Added group undo/redo functionality, allowing atomic grouping of related edits.
- Implemented `SwapRecorder` and integrated it as a callback interface for mutations.
- Added unit tests for swap journaling (save/load/replay) and undo grouping.
- Refactored undo to support group tracking and ID management.
- Updated CMake to include the new tests and swap journaling logic.
Claude
kyle