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M1.4: crash-safe catalog persistence (op log + snapshot)

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- catalog: Store trait (FsStore: temp+fsync+rename+dir fsync; MemStore),
  Journal: CRC-checked JSON-lines op log with sequence numbers + atomic
  snapshots; torn final record dropped and truncated, stale records after a
  snapshot skipped, mid-log damage preserved as catalog.log.damaged-N.
- PushHistory op so each edit logs one history step (not the full history).
- engine: Session::open_library/persist/close_library; every top-level
  command is fsynced before returning; presets.json + view.json;
  library.info / library.compact commands.
- app: default library ~/Pictures/LightCraft Library (LIGHTCRAFT_LIBRARY or
  --library DIR override), --memory for throwaway sessions, snapshot on quit.
- tests: proptest replay(log)==state with random snapshots/reopens, every
  truncation of the last record, stale log, mid-log damage, FsStore, engine
  restart without close.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
This commit is contained in:
Brandon ThomasandClaude Opus 5.5 committed 2026-09-30 23:40:40 -04:00
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commit e7b3724b5f
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+1049 -17
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docs/showcase/README.md
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@@ -4,11 +4,11 @@ The screenshots in `docs/images/` are captured by driving LightCraft over its co
```sh
# public-domain set (downloaded into the gitignored corpus/, see assets/ATTRIBUTION.md for sources)
cargo run --release -p lightcraft -- --control 7980 corpus/images/pd &
cargo run --release -p lightcraft -- --memory --control 7980 corpus/images/pd &
python3 docs/showcase/run.py docs/showcase/pd-edits.jsonl
# procedural demo library
cargo run --release -p lightcraft -- --control 7980 &
cargo run --release -p lightcraft -- --memory --control 7980 &
python3 docs/showcase/run.py docs/showcase/demo.jsonl
# compress for the repo (macOS)
docs/showcase/demo.jsonl
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@@ -1,4 +1,4 @@
# Demo-library showcase: run LightCraft with `--control 7980` (no files → procedural demo library)
# Demo-library showcase: run LightCraft with `--memory --control 7980` (no files → procedural demo library)
{"method":"ui.resize","params":{"width":1600,"height":1000}}
{"method":"engine.execute","params":{"command":"view.photoGrid"}}
{"method":"ui.set","params":{"leftPanel":true,"right":"edit","thumbSize":230,"openSections":["light","color"],"presets":false}}