diff --git a/conductor/tracks/mma_verification_20260225/plan.md b/conductor/tracks/mma_verification_20260225/plan.md
index 219c829..bc2e493 100644
--- a/conductor/tracks/mma_verification_20260225/plan.md
+++ b/conductor/tracks/mma_verification_20260225/plan.md
@@ -1,6 +1,6 @@
 # Implementation Plan: MMA Tiered Architecture Verification
 
-## Phase 1: Research and Investigation
+## Phase 1: Research and Investigation [checkpoint: cf3de84]
 - [x] Task: Review `mma-orchestrator/SKILL.md` and `MMA_Support` docs for Tier 2/3/4 definitions. e9283f1
 - [x] Task: Investigate "Centralized Skill" vs. "Role-Based Sub-Agents" architectures for hierarchical delegation. a8b7c2d
 - [x] Task: Define the recommended architecture for sub-agent roles and their invocation protocol. f1a2b3c