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figcraft/crates/format
Filip StrajnarandClaude Opus 5.5 3009d19fde M6: .fig embedded images are copied once per blob, not once per hash (#1059)
Images carried inside a `.fig` message (`image.dataBlob` indexing the
message's `blobs`) were copied out before the message is dropped, one copy
per image hash. Nothing stops a file from pointing many hashes at one
blob: 100 hashes on a 250 MB blob made 25 GB of copies, an out-of-memory
abort from a small file.

The walk now records each hash's blob index, and `embedded_copies` makes
one shared copy per blob for every hash that names it, so the copies are
bounded by the message's own size. Each resolved image is still copied
once on its way into the document, where images are kept by content hash.

Regression: fifty hashes on one blob share one copy; a hash naming a
missing blob is left out.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LvG6Dyzof21BCrUsByhx2w
2026-10-28 22:45:45 +01:00
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