refactor(compress): implement structured compression block state#412
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Tarquinen merged 2 commits intorefactor/one-tool-to-rule-them-allfrom Feb 27, 2026
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- Replace flat `prune.messages` map with structured `CompressionBlock` state. - Add `syncCompressionBlocks` to reconcile block state across sessions and message mutations. - Update `compress-utils` and `compress` tools to build and apply rich block state including `effectiveMessageIds` and `effectiveToolIds`. - Fix `stats`, `context`, and `notification` logic to accurately calculate metrics based on active blocks instead of flat map sizes. - Handle state persistence and initialization for the new structured format.
Tarquinen
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Summary
Fixes all
/undobehavior. When users undo back to a previous prompt, any compressions will also be undone.Note: previous persisted compression data is not supported
prune.messagesmap with structuredCompressionBlockstate.syncCompressionBlocksto reconcile block state across sessions and message mutations.compress-utilsandcompresstools to build and apply rich block state includingeffectiveMessageIdsandeffectiveToolIds.stats,context, andnotificationlogic to accurately calculate metrics based on active blocks instead of flat map sizes.