Which GitHub features would you consider a blocker for migrating to a different code forge, and in what order do you prioritize them?

Context:

I am heads down building a code forge (https://juju.bi) based on three ideas:

  - Code collaboration part should work offline
  - Should be compatible with GitHub API (like how some services are considered S3 compatible)
  - Support `change-id` based features (ex: Jujutsu's evolog)

I shipped a super-early version that I am currently dogfooding. https://juju.bi/changelog/2026-07-01-alpha-release

I am currently focused on improving the experience for small teams working on private repos. I would like to polish the overall product before thinking about public repos. (A lot of great forges exist for public repos right now).

  1. Branch protection rules
  2. CI
  3. Terraform provider (API)