Problem
services/memory/skill_format.py still builds skill frontmatter timestamps with datetime.utcnow(). Python deprecates this API in favor of timezone-aware UTC calls.
Suggested fix
Use datetime.now(timezone.utc) and keep the existing serialized YYYY-MM-DDTHH:MM:SSZ output shape.
Scope
Small cleanup only; no UI changes.
Problem
services/memory/skill_format.py still builds skill frontmatter timestamps with datetime.utcnow(). Python deprecates this API in favor of timezone-aware UTC calls.
Suggested fix
Use datetime.now(timezone.utc) and keep the existing serialized YYYY-MM-DDTHH:MM:SSZ output shape.
Scope
Small cleanup only; no UI changes.