Ooh, Woodpecker CI works with Gitea and Forgejo. https://woodpecker-ci.org/ That might be last piece I needed to migrating Git repos from GitHub to a self-hosted forge.

Edit: Actually there's Gitea Actions and Forgejo Actions, that might be enough for my use case.

https://docs.gitea.com/usage/actions/

https://forgejo.org/docs/next/user/actions/reference/

I’ve found gitea actions (based on ACT, so it’s nearly identical to a GitHub action runner) to work great. Migrating a GitHub workflow is mostly just a file name change.