ci: only run mirror to tangled on npmx repo

[jonathanyeong]

This will skip running this github action on forks which will always fail (example).

I think it's okay to limit to github repository since the tangled remote is also hardcoded to npmx:

          git remote add tangled git@tangled.org:npmx.dev/npmx.dev

Github actions doc: https://docs.github.com/en/actions/how-tos/write-workflows/choose-when-workflows-run/control-jobs-with-conditions

[vercel]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Feb 10, 2026 8:07pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Feb 10, 2026 8:07pm
npmx-lunaria	Ignored		Feb 10, 2026 8:07pm

[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request modifies the .github/workflows/mirror-tangled.yml workflow to add a conditional guard to the mirror job. The condition restricts the job so it runs only when the repository is npmx-dev/npmx.dev. No other workflow logic or steps were changed. The change adds one line to the file.

🚥 Pre-merge checks | ✅ 1

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description check	✅ Passed	The pull request description clearly explains the purpose of limiting the GitHub Action to the npmx repository to prevent failures on forks, with supporting rationale and documentation links.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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No actionable comments were generated in the recent review. 🎉

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

[jonathanyeong]

Confirmed job skipped on my fork https://github.com/jonathanyeong/npmx.dev/actions/runs/21881062641