Switching from Beamer, Headway, or a plain CHANGELOG.md file? On your dashboard, open "Switching from another changelog tool? Import it" under your project and either paste a URL to your old changelog page or paste the raw text directly.
Claude reads it and extracts up to 30 distinct entries, categorizing each one the same way it categorizes your GitHub PRs. Imported entries always land as drafts on your existing draft release, so you review, edit, and publish them yourself, nothing goes live automatically.
Pasting a URL fetches that page server-side with the usual safety checks: only public web addresses are allowed, private and internal network addresses are rejected, and the fetch times out and gives up past a size limit. If a URL doesn't work (login walls, heavy JavaScript rendering, redirects), copy the changelog text itself and paste that instead.