From bug report to a failing test and a fix, proven by running them.

ReproPilot reads an issue, writes a minimal test, and runs it in an isolated sandbox. It only reports a reproduction when the test fails for the reported reason, then proposes a patch and keeps it only if the test and the full suite pass.

This hosted page replays a run recorded on 2026-10-29. The 3 test runs in it were executed for real by pytest on the local runner. The 3 model responses came from Nemotron on Nebius Token Factory. Live runs on any GitHub issue need the self-hosted server, see the README.