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Chris Lu
72009c607b
* feat(idx): add check_index_file mirroring Go idx.CheckIndexFile Index-only structural check: walk the on-disk index, sort by (offset, size), flag overlapping needles, and verify the file is a whole number of entries. No data-file reads. Claude-Session: https://claude.ai/code/session_015EE9Sc9EvNp8BCVva4RKdo * refactor(ec): use idx::check_index_file in EcVolume::scrub_index Drops the inline walk/sort/overlap copy. Walks a private fd so the structural scan never moves the shared ecx_file cursor (read positionally elsewhere). Claude-Session: https://claude.ai/code/session_015EE9Sc9EvNp8BCVva4RKdo * fix(scrub): make Volume::scrub_index an index-only check on the on-disk .idx INDEX mode walked the deduped in-memory map and read .dat headers — more than the cheap-INDEX contract allows, yet missing Go's overlap and size-multiple structural checks. Route it through idx::check_index_file so it matches Go's Volume.ScrubIndex and the INDEX<LOCAL<FULL cost tiering holds. Ports openIndex's zero-size-index guard (a populated .dat with an empty .idx is corruption) and takes the data-file read lock for a consistent snapshot. Claude-Session: https://claude.ai/code/session_015EE9Sc9EvNp8BCVva4RKdo