Paste a public GitHub repo URL. It pulls a handful of the biggest source files straight from GitHub and gets an honest, aggregated legacy/migration read across the whole codebase — not just one snippet.
No key stored yet. Get one at platform.claude.com — the check calls the API directly from your browser with your key, so you pay for your own usage (typically a fraction of a cent per check). The key is saved only in this browser's local storage; this site has no server and never sees it.
This tool needs a real API key even for the "no setup" path we use on the other tools — it also has to talk to GitHub's API directly, which the claude.ai sandbox doesn't allow.
This reads directly from GitHub's public API — nothing is cloned, nothing is stored anywhere. Public repos only.