Coding agent system prompt

System prompt for a coding agent fixing a repo issue

This prompt is a system prompt for a coding agent asked to fix an issue in an open-source repository. It lays out the work order: understand the issue, explore the code, plan, make small changes, debug, test, and confirm the fix. It comes from OpenAI's GPT-4.1 prompting guide and points to a /testbed folder you should swap for your repo path.

Set up a coding agent to fix a repo issue