xiaoen 9f36e50807 feat(memory): implement append-only JSONL session store ... Add JSONLStore that persists sessions as .jsonl files (one message per line) plus .meta.json for summary and truncation offset. Key design decisions: - Append-only writes — no full-file rewrites on AddMessage - Logical truncation via skip offset instead of physical deletion - Per-session mutex for safe concurrent access - Crash recovery: malformed trailing lines are silently skipped - Atomic metadata writes using temp+rename Zero new dependencies — pure stdlib. Refs #711		2026-02-26 08:35:04 +08:00
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jsonl.go	feat(memory): implement append-only JSONL session store	2026-02-26 08:35:04 +08:00
store.go	feat(memory): define Store interface for session persistence	2026-02-26 08:35:04 +08:00