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feat: update game cache per file instead of full re-download - #121
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client: manifest files carry sha256 hash + size, hashes memoized by size+mtime, manifest built per request (no shared list race). website: diff local hash index vs manifest, download new/changed, delete removed, reuse only when hash and size match. Closes #8
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MartinFillon
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Oct 23, 2026
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Resolves #8
Problem
Cache all-or-nothing. One file change → wipe OPFS, download whole game. Cached files never checked.
Fix
{ path, hash, size }. SHA-256, memo by size+mtime → no rehash each request.MANIFEST.filesrace gave partial lists → with diff would delete cached files.path → hashindex in localStorage. Diff vs manifest:Download i / N, N = outdated only.isManifestUpToDate+version/(unused now). client still sendsversion.