What it does

Install the extension, paste in your OpenAI API key, and click the icon on any GitHub PR or GitLab MR page. It scrapes the diff, commit messages, and description, ships them to ChatGPT, and shows the response in a popup window. You copy-paste anything useful; nothing posts automatically.

The interesting bit

The FAQ is refreshingly honest: it admits this is a GPT wrapper, warns that results “often produces different feedback” on re-runs, and notes the model sometimes “hallucinates things that sound plausible but are false.” The suggested fix for larger PRs is simply to run it again and hope the dice roll better.

Key highlights

• Supports both GitHub PRs and GitLab MRs (patch format plus description fed to the model)
• Requires your own OpenAI API token; no separate backend or subscription
• Caches OpenAI responses in browser storage to avoid redundant calls
• Only Chrome; no Firefox, no Safari, no exceptions
• Open source under MIT, inspired by a site-summarizer extension

Caveats

• Only Chrome is supported, and the README is explicit about this
• The extension does not post comments directly to PRs; it’s strictly copy-paste
• The authors suggest re-running reviews multiple times and using “your judgement” to filter hallucinations

Verdict

Worth a look if you want a quick second opinion on small-to-medium diffs and don’t mind babysitting an LLM. Skip it if you need integrated CI comments, cross-browser support, or reviews you can trust without verification.