farol
farol is a CLI and GitHub Action that shows how risky a pull request merge is and which files to review first, for the person approving the change.
What it is good for
- Deciding which pull request files need careful review before merging
- Finding which pages and API endpoints a code change reaches
- Catching breaking API contract changes before clients are affected
- Checking diff coverage and security findings on changed lines
At a glance
- Who it is for
- Setup
- Guided command-line setup
Level 4 of 5. You copy and paste commands into a terminal by following the instructions. Comfortable territory for vibe coders.
- Cost
- Free and open source
- Type
- Agent app
- Tasks
- Works with
- GitHub Actions, GitHub, TypeScript, Go, Python
Momentum
- Rank this week
- Not ranked yet
- Best rank
- None yet
- GitHub stars
- 171
GitHub numbers as of Nov 2, 2026. Updated weekly.
On Hacker News
- Show HN: Farol, A risk map of a pull request for the person who approves it 60 points, 43 comments, Oct 25, 2026
Official links
Setup steps are on the official pages. We do not repeat them here, since they change.
Questions
- Is farol free?
- Yes. It is free and open source (MIT license).
- Do I need to know how to code to use farol?
- You do not need to write code, but setup means copying and pasting commands into a terminal by following its instructions.
- What does farol work with?
- According to its own documentation, it works with GitHub Actions, GitHub, TypeScript, Go, and Python.
- What is farol good for?
- Deciding which pull request files need careful review before merging, finding which pages and API endpoints a code change reaches, catching breaking API contract changes before clients are affected, and checking diff coverage and security findings on changed lines.
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