diff --git a/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md b/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md
index ab012fd..947039b 100644
--- a/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md
+++ b/conductor/tracks/aggregation_smarter_summaries_20260322/plan.md
@@ -1,23 +1,23 @@
 # Implementation Plan: Smarter Aggregation with Sub-Agent Summarization
 
-## Phase 1: Hash-Based Summary Cache
+## Phase 1: Hash-Based Summary Cache [checkpoint: e972cf4]
 Focus: Implement file hashing and cache storage
 
-- [ ] Task: Research existing file hash implementations in codebase
-- [ ] Task: Design cache storage format (file-based vs project state)
-- [ ] Task: Implement hash computation for aggregation files
-- [ ] Task: Implement summary cache storage and retrieval
-- [ ] Task: Add cache invalidation when file content changes
-- [ ] Task: Write tests for hash computation and cache
-- [ ] Task: Conductor - User Manual Verification 'Phase 1: Hash-Based Summary Cache'
+- [x] Task: Research existing file hash implementations in codebase 3218104
+- [x] Task: Design cache storage format (file-based vs project state) 3218104
+- [x] Task: Implement hash computation for aggregation files 3218104
+- [x] Task: Implement summary cache storage and retrieval 3218104
+- [x] Task: Add cache invalidation when file content changes 3218104
+- [x] Task: Write tests for hash computation and cache 3218104
+- [x] Task: Conductor - User Manual Verification 'Phase 1: Hash-Based Summary Cache' e972cf4
 
 ## Phase 2: Sub-Agent Summarization
 Focus: Implement sub-agent summarization during aggregation
 
-- [ ] Task: Audit current aggregate.py flow
-- [ ] Task: Define summarization prompt strategy for code vs text files
-- [ ] Task: Implement sub-agent invocation during aggregation
-- [ ] Task: Handle provider-specific differences in sub-agent calls
+- [~] Task: Audit current aggregate.py flow
+- [~] Task: Define summarization prompt strategy for code vs text files
+- [~] Task: Implement sub-agent invocation during aggregation
+- [~] Task: Handle provider-specific differences in sub-agent calls
 - [ ] Task: Write tests for sub-agent summarization
 - [ ] Task: Conductor - User Manual Verification 'Phase 2: Sub-Agent Summarization'