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Merge PR #5421: fix(format): serialise directory bundle saves with a bundle-wide lock

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crates/format/src/store.rs: kept both field sets in PcraftWriter::default (main's blob_hash_cache/compressed_budget and the PR's lock_wait) and both setters (set_compressed_cache_budget, set_lock_wait).
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aiongg
2026-10-22 02:24:47 +00:00
parent 3a72e25b02 e795cabc79
commit 2c2269ff0b
5 changed files with 81 additions and 2 deletions
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book/src/formats/pcraft.md
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@@ -8,8 +8,11 @@ tiles/<blake3>.zst
blobs/<blake3>.zst
thumb.png
composite/preview.png
save.lock
```
`save.lock` exists only in directory bundles: a save holds an OS file lock on it while it writes objects, publishes the manifest and removes unreferenced objects, so concurrent saves of one bundle take turns. It is empty, and readers ignore it.
The manifest is versioned and describes the document tree. Tiles and blobs are content-addressed. Loaders verify ZIP entry bounds and CRCs; document content also uses stored hashes to detect mismatched or corrupted tile/blob content. Unsupported newer format versions fail explicitly.
## Implemented load limits