diff --git a/conductor/tracks/tiered_context_scoping_hitl_approval/plan.md b/conductor/tracks/tiered_context_scoping_hitl_approval/plan.md
index 509a641..3a6f556 100644
--- a/conductor/tracks/tiered_context_scoping_hitl_approval/plan.md
+++ b/conductor/tracks/tiered_context_scoping_hitl_approval/plan.md
@@ -1,6 +1,6 @@
 # Implementation Plan: Tiered Context Scoping & HITL Approval
 
-## Phase 1: Context Subsetting
+## Phase 1: Context Subsetting [checkpoint: d7a24d6]
 - [x] Task: Refactor `aggregate.py` to support targeted context builds (e.g., `build_tier1_context`, `build_tier3_context`). 6aa642b
 - [x] Task: Integrate AST skeleton extraction into the standard Tier 3 context build. 0ed01aa
 - [x] Task: Update the project state to track which files are assigned to which tier. 2ece9e1