feat
BREAKING
task/mpack-phase2-apply-writes-pack
#1 / 1
feat: apply_mpack writes MPack pack file instead of loose objects (issue #70 Phase 2)
Wire-received objects now land in a single .mpack + .idx file pair via write_pack() — 2 file writes regardless of object count.
Eliminates the XL clone hang caused by 14,000 individual write_object() calls (~1ms each on macOS = 14s+ of syscall overhead).
Integrity checks (dedup, size cap, content/ID hash) still run per-object before collecting into the pack list — all safety invariants preserved. has_object() is used to skip already-present objects so the pack never stores duplicates. Commits and snapshots still write to their own dirs.
PF-2 test updated: patches write_pack instead of write_object.
sha256:dedbc830bb9742683245ab1e59b29883aa01c889ff600f075c27420b10e6207a
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sha256:7785dafbdbc374dd5639baf43437efb3460582faa537ed58f63fa80364538b26
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