- The history is deleted when the session's persisted record goes (forgetEditHistory):
kill via cleanupSession (a pinned record is only demoted and keeps it), the
persisted-only DELETE, and stale cleanup at startup. After remove() neither a sync in
flight nor a later request writes the file again; writes are serialized.
- load() re-bounds a damaged file: cursors, pending Bash calls (MAX_PENDING_BASH) and
subagent labels (MAX_AGENTS, oldest unused dropped first).
- Load older reads one block of every transcript, budget split between them, and only
the files it asked for; a block short of budget reads its end. A line longer than the
budget is skipped going back as well (floorMidLine).
- Concurrent first callers share one store; a forward request folded with an older one
still reads forward.
- Images outside the workspace get no thumbnail (one attachment id per render); a click
opens the shared preview, which registers once with notify: false.
- Docs: per-edit diff cap, deletion rule, load-time bounds, thumbnails, follow triggers.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
