diff --git a/conductor/tracks/result_migration_small_files_20260617/plan.md b/conductor/tracks/result_migration_small_files_20260617/plan.md
index 2251bf18..bf49f331 100644
--- a/conductor/tracks/result_migration_small_files_20260617/plan.md
+++ b/conductor/tracks/result_migration_small_files_20260617/plan.md
@@ -148,7 +148,7 @@ The 35 SMALL files are batched 5-7 per commit (per the umbrella spec). The 2 MED
 
 ### Phase 3: Logging + Tracking batch (7 files)
 
-- [ ] **Task 3.1: Migrate `src/summary_cache.py` (4 sites)**
+- [x] **Task 3.1: Migrate `src/summary_cache.py` (4 sites)** [22db985e] 
   - WHERE: `src/summary_cache.py:39, 48, 91, 100`
   - WHAT: Each `try/except` becomes a `Result[T]` return
   - HOW: `manual-slop_get_file_slice` for each site; convert