Problem

No mechanism to consolidate loose objects into packfiles or to repack existing packfiles into fewer, more efficient ones. Over time, repositories accumulate many small packs and loose objects.

Impact

• Object lookup degrades as pack count increases (linear scan over packs)
• Storage fragmentation on filesystem and S3
• No way to optimize repository after many pushes

Acceptance Criteria

• repack operation: collect loose objects into a new packfile
• Option to consolidate multiple packs into one
• Removes loose objects that are now in a pack
• Removes old packs that have been consolidated
• Atomic: old packs not deleted until new pack is verified
• Works across all storage backends
• Tests covering: loose → pack, multi-pack consolidation, concurrent access safety