multi-session-build-state-lost-during-context-compaction

name	Multi-session build state lost during context compaction
description	During the agentskill-kaizen build (8-phase `/plugin-dev:create-plugin` workflow), context compaction mid-build converted structured task state into a narrative summary. The resuming session had to reconstruct "what's done vs pending" from prose rather than a checklist. Background agent results that were already consumed and applied reappeared as late notifications after compaction, requiring manual deduplication ("did I already handle this?"). No persistent artifact tracked phase completion, commit SHAs per phase, deferred items, or agent result consumption status. **Observed symptoms**: - Phase completion status existed only in ephemeral context — lost on compaction - Background agent notifications arrived after their findings were already applied (3 duplicate notifications) - Plan committed early (`87a0b93`) diverged from actual implementation but was never updated - No mechanism to mark agent results as "consumed" — each notification required re-evaluation
metadata	{"topic":"multi-session-build-state-lost-during-context-compaction","source":"agentskill-kaizen plugin build (2026-02-18), 3 sessions with 1 compaction","added":"2026-02-18","priority":"P2","type":"Feature","status":"open","issue":"#113"}