- Eliminated duplicate content (entire template was repeated twice) - Renamed 'Linked Issue' to 'Governing Issue' per CONTRIBUTING.md language - Added explicit 'no proof = no merge' callout in Proof section - Renamed 'What was tested' to 'Commands / logs / world-state proof' for clarity - Enhanced checklist with items from #393: issue reference, syntactic validity, proof standard - Added inline guidance comments referencing CONTRIBUTING.md Closes #451