PR-AF — Open-Source AI Code Reviewer
Post by Om Nalinde — “Be honest: how many of your AI code review comments do you actually read?”
The False Positive Tax
Every “this might be an issue” that turns out to be nothing trains you to skim. Then skip. Then mute the bot entirely.
The tool didn’t fail because it was dumb — it failed because it cried wolf.
How PR-AF Fixes It
PR-AF is #1 open-source reviewer on Martian Code-Review-Bench, ahead of Qodo, CodeRabbit, Greptile, Copilot, and Devin.
5 Key Features
- Benchmark-leading recall — 0.706 golden recall across 42 compared tools
- AST-grounded — every finding pulled from real code via AST extraction; unprovable claims pruned
- Falsifiability gate — system actively tries to prove itself wrong before posting to your PR
- Cross-file risk linking — connects minor anomalies into compound risks (e.g., exposed API key + DB vulnerability)
- Fully open source — clone, add keys, drop in GitHub Actions workflow, no seat licenses
Trade-off
- Reviews take 35–50 minutes
- Designed as final CI/CD gatekeeper, not inner-loop buddy
- ~$0.80 per 500-line PR
Key Takeaway
“Trust is the product in code review — and you can just install this one.”