fix: plan skill flows into /agent-loop:run when user confirms

skills/plan/SKILL.md

@@ -179,10 +179,8 @@ Show the user a summary:
 
 ### Step 8: Wait for Feedback
 
-Let the user review and adjust. They might:
-- Ask to split a story further
-- Ask to reorder priorities
-- Ask to add/remove stories
-- Ask to change acceptance criteria
+Ask the user:
+> **Ready to start?** I can begin implementing now, or you can adjust the plan first.
 
-Make the requested changes, then re-present the summary.
+- If the user confirms (yes, go, start, implement, etc.) → invoke `/agent-loop:run` to begin the loop immediately
+- If they want changes (split a story, reorder, add/remove, change criteria) → make the changes, re-present the summary, and ask again