Farol

Farol is a free open-source CLI and GitHub Action that evaluates the risk of merging a pull request.

Farol is a free, open-source CLI and GitHub Action designed to help human reviewers assess the risk of merging a pull request. Operating after AI code reviews and before human approval, it measures merge risk by analyzing the declaration graph of the codebase using real compilers and parsers for TypeScript, React, Go, and Python. It ranks the riskiest files by reach, diff coverage, and findings, and generates a single-file HTML report alongside a pull request comment. Farol supports integrations with tools like Datadog for production traffic and errors, and incorporates linters, audits, and test reports. It runs locally or within your CI runner without sending your code to external servers.

Farol at a glance

Best for: Software engineer
Runs on: CLI, GitHub Action, Web
Pricing: Free and open-source under the MIT license.
Released: October 2026
Category: AI coding tool
Website: winnin.github.io

Key features

Measures merge risk from static analysis
Ranks files by reach and diff coverage
Analyzes TypeScript, React, Go, and Python
Generates single-file HTML reports
Integrates via CLI and GitHub Action
Incorporates linter and audit reports
Fails closed on unreadable changes

Use it for

Assessing pull request risk before human approval
Prioritizing code review order for risky files
Detecting breaking contract changes across endpoints
Generating review plans for developers and reviewers

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