chore: Assign an open-source lead to PRs from external users

[c-warren]

What changed?

Adds a Gitar rule to assign all pull requests from outside of Cadence's codeowners to an internal team member.

Why?

To improve our response time for PRs created by external users and reduce the overhead for external contributors to find someone to review their PR this rule will assign a user who is responsible for delegating review of the PR to a cadence team member.

How did you test it?

Testing it right now!

Potential risks

N/A

Release notes

N/A

Documentation Changes

N/A

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Reviewer Validation

PR Description Quality (check these before reviewing code):

• "What changed" provides a clear 1-2 line summary
  • Project Issue is linked
• "Why" explains the full motivation with sufficient context
• Testing is documented:
  • Unit test commands are included (with exact go test invocation)
  • Integration test setup/commands included (if integration tests were run)
  • Canary testing details included (if canary was mentioned)
• Potential risks section is thoughtfully filled out (or legitimately N/A)
• Release notes included if this completes a user-facing feature
• Documentation needs are addressed (or noted if uncertain)

[c-warren]

gitar display:verbose

[c-warren]

gitar auto-apply:on

[gitar-bot]

Code Review ✅ Approved

Clean addition of a Gitar automation rule to auto-assign maintainer reviewers for external contributor PRs. The configuration is well-documented with clear trigger conditions and assignment logic.

Rules

Repository Rules

➖ Assign Maintainer Reviewer for External Contributors: PR author c-warren not in CODEOWNERS; @demirkayaender already assigned

_{Hide rules that don't apply by commenting gitar display:compact.}

Options ✅ Auto-apply

✅ Auto-apply is on → Gitar will commit updates to this branch.
Display: verbose → Showing more information.

Comment with these commands to change:

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gitar auto-apply:off	gitar display:compact

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