chore: add minimal comments guideline to AGENTS.md

Michael Angelo Riverarequested to merge
minimal-comments into main

What does this MR do and why?

Adds code quality guidelines for writing minimal comments. References the /remove-llm-comments skill for cleanup.

Related Issues

None

Testing

N/A - documentation only

Performance Analysis

  • This merge request does not introduce any performance regression. If a performance regression is expected, explain why.

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