fix(skills): normalize retrospective metadata

src/bmm/agents/sm.agent.yaml

@@ -28,7 +28,7 @@ agent:
       description: "[CS] Context Story: Prepare a story with all required context for implementation for the developer agent"
 
     - trigger: ER or fuzzy match on epic-retrospective
-      exec: "{project-root}/_bmad/bmm/workflows/4-implementation/bmad-retrospective/workflow.md"
+      exec: "skill:bmad-retrospective"
       data: "{project-root}/_bmad/_config/agent-manifest.csv"
       description: "[ER] Epic Retrospective: Party Mode review of all work completed across an epic."
 

src/bmm/workflows/4-implementation/bmad-retrospective/workflow.md

@@ -1,8 +1,3 @@
----
-name: bmad-retrospective
-description: 'Post-epic review to extract lessons and assess success. Use when the user says "run a retrospective" or "lets retro the epic [epic]"'
----
-
 # Retrospective Workflow
 
 **Goal:** Post-epic review to extract lessons and assess success.