PR Zen

Floating navigator for noisy GitHub Pull Requests
Navigate long PR timelines without losing your mind.

Website · Install · Features · How it works · Shortcuts · Privacy

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The Problem

Modern GitHub PRs accumulate dozens of bot comments — CI, SonarCloud, Codecov, Vercel previews, and now AI code reviewers (Copilot, CodeRabbit, Claude…) — that are useful and should be read, but:

• Too much scrolling to navigate between items
• No overview of the timeline
• Human reviews get buried under bot noise
• No way to tell which bot report is an alert vs. informational

PR Zen doesn't hide anything. It gives you a bird's-eye view of the entire PR conversation.

This is a long-standing pain point in the GitHub community:

• Allow to mute bots — bot noise drowns real notifications
• No way to easily view unresolved conversations — conversations get lost in long PRs
• Hide or Collapse Issue History — feature request to collapse non-comments

Install

Chrome Extension (recommended)

Install from the Chrome Web Store — or load unpacked from the extension/ folder for development.

Userscript (legacy)

Requires Tampermonkey (Chrome, Firefox, Edge, Safari)

1. Install Tampermonkey for your browser
2. Click Install PR Zen userscript (or open the raw file URL in Tampermonkey)
3. Visit any GitHub Pull Request — the pill appears automatically

Features

Floating Pill — sits in the bottom-right corner showing live stats: 2 reviews · 21 bots · 4 alerts

Timeline Panel — click the pill (or press Alt+Z) to open a chronological timeline of all PR comments, classified by type:

Color	Type	Description
🟢 Green	Reviews	Human comments and reviews
⚪ Gray	Bots	Informational bot reports (Vercel, SonarCloud, etc.)
🔴 Red	Alerts	Bot reports containing failures, errors, or vulnerabilities

Smart titles — extracts the heading from each comment (e.g. "Review Claude", "Quality Gate passed", "Vercel Preview") instead of showing raw text.

Grouped entries — consecutive identical bot reports are collapsed into a single entry with a count badge (×4).

Click to navigate — click any item to smooth-scroll to that comment, with a temporary highlight.

Theme-aware — uses GitHub's own CSS variables to match all 7 themes (light, dark, soft dark, protanopia, tritanopia).

Accessible — WCAG AA: full keyboard navigation, ARIA roles, focus management, prefers-reduced-motion support.

Configurable — customize bot patterns, alert keywords, and activation threshold from the extension popup.

Works with GitHub SPA — handles Turbo/pjax navigation without breaking.

Conditional activation — the pill only appears on PRs with 3+ bot comments. Clean PRs stay clean.

How it Works

PR Zen is a Chrome extension (Manifest V3) with zero dependencies. It:

1. Scans .js-timeline-item elements in the PR conversation
2. Classifies each comment as human, bot, or alert using author patterns and content keywords
3. Renders a floating pill + timeline panel with vanilla DOM manipulation
4. Uses MutationObserver to stay in sync with GitHub's dynamic DOM

Bot detection

Pattern matching on username: [bot], github-actions, dependabot, codecov, sonarcloud, vercel, netlify, renovate, claude-code-review, copilot, coderabbit, gemini-code-assist, codeclimate, snyk, bors, rustbot, k8s-ci-robot, typescript-bot, and more. Fully customizable from the extension popup.

Alert detection

Keywords in comment body: failed, error, decreased, below threshold, critical, vulnerability, blocked.

Keyboard Shortcuts

Shortcut	Action
Alt+Z	Toggle the navigator panel
↑ ↓	Navigate between items
Enter	Scroll to selected item
Escape	Close the panel

Privacy

PR Zen does not collect, transmit, or store any personal data. See Privacy Policy.

License

MIT — Made by Cocola