From One Issue to a Pull Request: Building a Harness and a 'Software Factory' with CodexFile an issue, and Codex triages it, writes a reproduction test first, fixes the bug, and opens a pull request with before/after screenshots and a reviewer verdict. We took the principles from OpenAI's "harness engineering" post, applied them to a small bill-splitting app, and pushed three real issues through.
Dante (Quokka Labs)Oct 30, 2026 
