Restrict the supersede sweep to compactions on the path from the current leaf so a newer compaction never rewrites a sibling branch's still-current summary or drops its preserveData. Streaming load now collects the active-branch ids before eliding instead of trampling sibling compactions encountered in file order.
Refs #3789
Stream large session loads, elide superseded compaction payloads, skip synchronous rewrites when the append-only file is already current, and provide usable picker previews for developer-started forks.
Fixes#3789
- Added a fixed-width title slot system to serialize and persist session titles across physical files and backend storage.
- Integrated automated session title updates triggered by todo replan operations using conversation history context.
- Extended storage interfaces across memory, file-system, Redis, and SQL backends to support independent title metadata updates.
- Implemented title metadata parsing within session loaders and list utilities to ensure accurate retrieval and display.
- Changed provider delta input comparisons in `buildResponsesDeltaInput` to use `Bun.deepEquals` instead of stringified JSON checks.
- Updated session message diffing to return early on length changes and compare normalized entries with deep equality.
- Replaced JSON-string assertions in the issue-966 repro test with `Bun.deepEquals` for stable equality checks.
- Added Matplotlib figure PNG rendering and display tracking in Python runner to emit PNG output immediately when figures are displayed via display(fig).
- Extended session persistence to externalize oversized image payloads in both content and details.images, enabling tool result images to survive session reload.
- Enhanced session loader to resolve image data payloads and blob references across content and details.images during session reconstruction.
- Added image cache invalidation in TUI image component when image protocol, cell dimensions, or Kitty Unicode placeholder mode changes.
- Added comprehensive test coverage for Matplotlib display, image persistence across reload, and TUI image rendering with protocol and dimension changes.
- Added session-domain modules and exports for session-entries, context, listing, loader, and migrations.
- Changed persistence to async append writes plus writeTextAtomic, removing sync line APIs.
- Added compaction-aware session context rebuild with dangling tool-call cleanup.
- Added resumable session resolution with status inference, id/stem/suffix matching, and backup recovery.
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