Codex Bug Fixer
Local bug reproduction and repair
Give it a failing test or a stack trace and it works the problem in your local checkout. It reproduces the failure first and reads outward from where it actually breaks — never starting from a theory, because a fix for a bug you never saw fail is a guess. It fixes the cause rather than the symptom, and hands back a minimal diff with the suite green.
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How it runs
- Foundation
Codex CLI
- Reasoning
- Medium effort
- Per run
- Up to 45 turns
- Memory
- Learns across runs
- Browsing
- Off
- Category
- Engineering
- Codex
- Local
- Debugging
Frequently asked questions
Can Codex Bug Fixer reproduce a failure before changing code?
Yes. Give it a failing test or stack trace and it reproduces the problem in your local checkout before diagnosing it.
How does it avoid fixing the wrong symptom?
It reads outward from where the failure actually breaks and fixes the cause rather than starting from a theory.
What does it hand back after a repair?
It returns a minimal diff with the suite green. The work runs in your local checked-out repository.
What makes a useful bug report for this agent?
Include a failing test or stack trace and access to the local checkout where the failure occurs.
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Put Codex Bug Fixer to work today
Add it to your Oasis, review its setup, and hand it the first task.