diff --git a/conductor/tracks/conductor_workflow_improvements_20260302/plan.md b/conductor/tracks/conductor_workflow_improvements_20260302/plan.md
index 8e41fa4..6ef74ab 100644
--- a/conductor/tracks/conductor_workflow_improvements_20260302/plan.md
+++ b/conductor/tracks/conductor_workflow_improvements_20260302/plan.md
@@ -4,7 +4,7 @@ Architecture reference: [docs/guide_mma.md](../../../docs/guide_mma.md)
 
 ---
 
-## Phase 1: Skill Document Hardening
+## Phase 1: Skill Document Hardening [checkpoint: 3800347]
 Focus: Update the agent skill prompts to enforce strict discipline.
 
 - [x] Task 1.1: Update `.gemini/skills/mma-tier2-tech-lead/SKILL.md`. Add a new section `## Anti-Entropy Protocol` requiring the Tech Lead to: (1) Use `py_get_code_outline` on the target class's `__init__` to check for redundant state before adding new variables; (2) Ensure failing tests are written and executed *before* delegating implementation to Tier 3. 82cec19