Developer Builds Free AI Pull Request Reviewer Using GitHub Actions and MonkeyCode

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A developer has shared a GitHub Actions workflow that automates code review on pull requests using MonkeyCode's free AI model tier, which offers ten million tokens at no cost. The pipeline triggers on pull request events, generates a unified diff of changes, and passes it to a Python script that queries the AI model for structured feedback. To stay within free-tier limits, the diff is truncated before being sent, and the model is prompted to return feedback as a JSON array with file path, line number, and comment body. The workflow uses GitHub secrets to manage API credentials securely, avoiding any exposure in the repository. The article was disclosed as part of MonkeyCode's product outreach, meaning it carries a promotional context.

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