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feat(session-persistence): readFrom(seq) primitive for watermark tail reads

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SessionPersistence grows readFrom(id, fromSeq, signal?): the non-mutating
read-from-seq primitive for checkpoint consumers (the persisted projection
cache folds only the tail past its watermark). Coordinator owns validation,
per-id serialization, and the sequential fallback (loadStored + forward
skip); SQLite implements the optional seek-capable loadStoredFrom hook
(WHERE seq >= ?), JSONL stays sequential by contract. Contract suite covers
suffix exactness, empty-tail, non-mutation, and cancellation; seam README
(both languages) documents the method and the hook.
This commit is contained in:
imccyu
2026-07-28 00:41:58 +08:00
parent 29f76080a2
commit a79de44c3b
14 changed files with 196 additions and 8 deletions
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4
packages/session-persistence/session-persistence/README.i18n.yaml
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@@ -2,5 +2,5 @@
# side as of the last confirmed-consistent state. Both languages carry equal authority;
# after editing either side, bring the other along and re-record with:
# pnpm run verify-translation-pairing --write packages/session-persistence/session-persistence/README.md
README.md: 3617305d0343ab4c0d9d802669a3c4f964271dc7
README.zh.md: ffa86b0093331306d524a590364fac527a2e5071
README.md: a8a4f14c8613a7e51bcf467e816b7f7bdb7ea80b
README.zh.md: 369e8a01b8ac411ed9acfbac86b9b34db8037c1f