perf: reduce memory and network cost for checkpoint metadata#680

Merged

pjbgf merged 18 commits intomainfrom

pjbgf/jsonl-data2

Mar 19, 2026

Commits on Mar 18, 2026

perf: use streaming json.Decoder and lite structs for checkpoint metadata

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feat: sparse metadata fetch with on-demand blob resolution

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perf: use shallow treeless fetch for metadata branch

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fix: resume fetches metadata branch and checks actual remote for branches
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fix: test failures from global core.hooksPath and remote metadata tree fallback

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refactor: use FetchingTree for on-demand blob resolution in checkpoint reads

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refactor: remove unused hasBaseFile and simplify chunk collection in CollectTranscriptBlobHashes

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fix: correct stale nolint comment in CollectTranscriptBlobHashes

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fix: log fetch-pack failure before falling back in FetchBlobsByHash

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fix: use git fetch instead of fetch-pack for blob fetching

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refactor: extract shared decodeCheckpointInfo to deduplicate metadata reading

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docs: clarify why getMetadataTree opens the repo multiple times

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docs: clarify freshRepo is always set before use in resumeFromCurrentBranch

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fix: avoid leaking git fetch output in logs and error messages

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Merge pull request #721 from entireio/soph/jsonl-data2-feedback
Soph
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Commits on Mar 19, 2026