yishentu--claudian/.github/PULL_REQUEST_TEMPLATE.md

Why

What Changed

Why This Approach

Validation

Impact and Follow-ups

Checklist

• This pull request addresses one focused problem, and I have explained why this change is necessary.
• I linked the relevant issue, or explained why no issue is needed.
• I added or updated tests for behavior changes, or explained why tests are not applicable.
• I ran the relevant typecheck, lint, test, and build commands.
• I updated user-facing documentation when needed.