Give it a GitHub issue.
Watch it open the pull request.

It clones the repository, reads the code, writes a plan for you to approve, edits inside a throwaway container, runs the test suite, repairs its own failures, and pushes a branch. Every step is shown as it happens.

Runs on this host’s own credentials by default, which means a daily spending ceiling and draft pull requests authored by its owner. Supply your own keys and the run is yours — billed to you, authored by you, and kept only for that run.