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## Why Guardian reviews need the original conversation evidence even after the parent context has been compacted, while rollback must still remove evidence from reverted turns. ## What changed - Build synchronous and asynchronous Guardian transcripts from the retained review-history snapshot. - Use the shared Guardian transcript collector for consistent entry formatting, tool attribution, and per-entry truncation while preserving the existing transcript retention budgets. ## Testing - Add app-server coverage for retaining user and tool evidence after compaction and discarding it after rollback. - Extend transcript tests for standalone tool outputs, shell calls, attribution, truncation, and retention limits. GitOrigin-RevId: a18b1176f14a4d006c263aa82d4e593afee66bc3