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Per-entry removeIncomingRepair / removeOutgoingRepair calls are replaced by a single trySaveMeta per *dirty* channel at the end of that channel's sweep. Failure is logged but does NOT abort the sweep — in-memory state is the source of truth (PLAN_SNAPSHOT_PERSISTENCE.md §8). Helpers added in sds/sds_utils.nim: - snapshotMeta(channel) — capture current ChannelContext as ChannelMeta blob (flattens Table-keyed buffers to seqs for the wire shape). - trySaveMeta(rm, channelId, channel) — best-effort meta snapshot save; logs on failure, never propagates. - tryUpdateHistory(rm, channelId, append, evict) — best-effort history update; skips the call entirely when both lists are empty (HistoryUpdate contract). Call-rate impact for runRepairSweep: - Before: N persistence calls per expired entry per channel. - After: at most 1 saveChannelMeta per dirty channel; 0 on idle channels (matches the dirty-flag floor in ANALYSIS_SNAPSHOT_SAVE_POINTS). All existing tests pass — including the 3 SDS-R Repair Sweep tests that directly exercise this proc. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>