diff --git a/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md b/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md
index da93845..137e7ee 100644
--- a/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md
+++ b/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md
@@ -39,11 +39,11 @@ Focus: Expose cache status and controls in UI
 - [x] Task: Write tests for UI integration 6bf6c79
 - [x] Task: Conductor - User Manual Verification 'Phase 4: UI Integration' a1c204f
 
-## Phase 5: Cache Persistence & Optimization
+## Phase 5: Cache Persistence & Optimization [checkpoint: e0737dc]
 Focus: Ensure cache persists and is performant
 
-- [~] Task: Implement persistent cache storage to disk
-- [~] Task: Add cache size management (max entries, LRU)
-- [~] Task: Performance testing with large codebases
-- [~] Task: Write tests for persistence
-- [ ] Task: Conductor - User Manual Verification 'Phase 5: Cache Persistence & Optimization'
+- [x] Task: Implement persistent cache storage to disk fb2df2a
+- [x] Task: Add cache size management (max entries, LRU) fb2df2a
+- [x] Task: Performance testing with large codebases fb2df2a
+- [x] Task: Write tests for persistence fb2df2a
+- [x] Task: Conductor - User Manual Verification 'Phase 5: Cache Persistence & Optimization' e0737dc