PRobe

PRobe is a free, open-source Chrome extension that brings AI-powered code review directly into the GitHub pull request interface. It uses your own Anthropic API key to provide context-aware chat, focused file analysis, and one-click comment posting — all without leaving the PR page. Setup takes under 60 seconds: install the extension, add your API key and GitHub token, and PRobe automatically loads diff context whenever you open a pull request.

• Context-aware chat — Ask questions about the entire PR diff and get answers grounded in the actual code changes.
• Focus context — Zoom into specific files or line ranges to ask targeted questions about individual functions or hunks.
• Review skills — Attach custom skill files (e.g., react-best-practices.md) to guide the AI's review style and domain knowledge.
• One-click reviews — Turn AI-generated suggestions directly into real GitHub PR comments without copy-pasting.
• X-Ray mode — Inspect exactly which context and skills the AI used to generate its answer, keeping reviews transparent.
• PR dashboard — Get a high-level overview of file changes, additions, deletions, reviewers, and commits before diving in.
• Bring your own keys — Uses your Anthropic API key and GitHub token, so no data is stored or proxied through a third-party server.
• Open source — The full extension source is available on GitHub under an open license; contributions are welcome.