GitHub PR Code Review

Automated PR code reviewer built with flomatai. Fetches a pull request diff from GitHub, reviews each changed file with an LLM (up to 3 concurrently), then posts a consolidated review comment back to the PR.

Pipeline Graph

fetch-pr → mapOver:files (concurrency=3) → review-file → post-review

Features

• Reviews each changed file independently via mapOver with concurrency: 3
• Skips binary files and files without diffs gracefully
• Posts a single GitHub review with per-file summaries and inline comments
• Approves, requests changes, or adds comments based on severity of findings

Setup

cp .env.example .env
# Fill in GITHUB_TOKEN and ANTHROPIC_API_KEY (or OPENAI_API_KEY)
pnpm install
pnpm build

Usage

# Review PR #42 in org/repo
GITHUB_TOKEN=ghp_xxx node dist/src/run.js --owner org --repo my-repo --pr 42

# Via env vars
export GITHUB_TOKEN=ghp_xxx
export GITHUB_OWNER=org
export GITHUB_REPO=my-repo
export GITHUB_PR=42
node dist/src/run.js

Environment Variables

| Variable | Required | Description | |----------|----------|-------------| | GITHUB_TOKEN | Yes | GitHub PAT with repo scope | | ANTHROPIC_API_KEY | Yes* | Anthropic API key | | OPENAI_API_KEY | Yes* | OpenAI API key (alternative) | | OPENCODE_BASE_URL | No | Use local OpenCode proxy | | LLM_MODEL | No | Override default model |

*One of ANTHROPIC_API_KEY or OPENAI_API_KEY is required.