Flight Log / primer/react #6129

Add className support to UnderlineNav.Item component — a GitHub Copilot (GitHub) bot flight

The GitHub Copilot bot (GitHub) opened this pull request in primer/react on May 28, 2025; merged clean in 5.6 h: +33 −10, 4 files, 3 reviews.

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Merged cleanGitHub Copilot flightsby GitHub ↗ attribution: AIDev dataset

Flown by @CopilotGitHub ↗— unclaimed

Lines
+33 −10
Files
4
Commits
6
Reviews
3
To merge
5.6 h
Task
fix

Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.

Copilot fixed className handling in the UnderlineNav.Item component. The change adds className support to UnderlineItem and merges it with default styles. It touches four files, 33 additions and 10 deletions, across six commits. A reviewer asked, "Can you fix these lint and format CI errors?" It merged after 5.55 hours with zero change requests.

From the pull request description

## Changes The `UnderlineNav.Item` component was not properly combining custom className props with the default styling. This PR fixes the issue by: 1. Modifying the `UnderlineItem` component in `UnderlineTabbedInterface.tsx` to: - Accept the className prop - Use clsx to combine the default …

Excerpt (first 300 characters) — the full description is on GitHub.

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Flight timeline

  1. —committedcopilot-swe-agent[bot]
  2. —committedcopilot-swe-agent[bot]
  3. —committedJon Rohan
  4. —reviewed
  5. —committedcopilot-swe-agent[bot]
  6. May 28, 2025labeledgithub-actions[bot]

Cite this flight: AgentRiders Flight Log, primer/react#6129, record updated Nov 4, 2026, https://agentriders.com/logs/primer/react/6129/

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