GitHub Enhancements — Retry Failed Builds

A Chrome extension that adds a Retry button directly on GitHub PR pages next to each failed GitHub Actions check.

Instead of clicking through to the Actions run page, finding "Re-run failed jobs", and confirming — just click Retry right from the PR.

Installation

1. Clone this repo (or download as ZIP)
2. Open chrome://extensions in Chrome
3. Enable Developer mode (toggle in top-right)
4. Click Load unpacked and select this folder

How It Works

• Detects failed GitHub Actions checks on PR pages using a MutationObserver (works with GitHub's SPA navigation)
• Injects a small "Retry" button in the action bar of each failed check row
• On click, fetches a scoped CSRF token from the Actions run page, then triggers GitHub's internal re-run endpoint — the same one used by the "Re-run failed jobs" button in the Actions UI
• Only targets GitHub Actions checks (skips third-party CI like Bugbot, CodeQL, etc.)
• Uses your existing GitHub session — no PAT or OAuth token needed

Architecture

Manifest V3 content script running in MAIN world (the page's own JS context). This is intentional — MAIN world scripts execute as part of the page itself, so fetch calls to github.com are same-origin with session cookies automatically included. No background service worker or special permissions are needed.

Button States

State	Appearance	Duration
Default	Red outlined "Retry"	—
Loading	Muted "Retrying..."	Until response
Success	Green "Retried!"	Resets after 5s
Error	Red filled "Failed" (hover for details)	Resets after 3s

Limitations

• Only works on github.com (not GitHub Enterprise — though adding your GHE domain to manifest.json matches would work)
• Requires you to be logged in to GitHub
• Third-party CI checks (anything without an /actions/runs/ link) are skipped since they don't use GitHub's re-run mechanism

File Structure

├── manifest.json        # Manifest V3 config
├── src/
│   ├── content.js       # DOM observation, button injection, retry logic
│   └── styles.css       # Primer-matching button styles
└── icons/
    ├── icon16.png
    ├── icon48.png
    └── icon128.png

Security

• No tokens stored: Uses your existing GitHub session cookies (httpOnly, handled by the browser) and fetches scoped CSRF tokens on demand
• No external requests: All communication is same-origin to github.com
• No permissions: The extension requests zero Chrome permissions — it only runs a content script on PR pages
• DOM-safe: All UI elements are created via document.createElement / textContent — no innerHTML usage