gitea-ai-pr

A Gitea composite action that posts AI-generated code review comments on pull requests using any OpenAI-compatible API endpoint.

Features

• Posts a review comment on every PR open/update event
• Tracks previous reviews and generates incremental diffs on subsequent pushes, so the model only sees what changed
• Truncates diffs larger than 12 KB to stay within token limits
• Works with any OpenAI-compatible endpoint (OpenAI, local models via Ollama, etc.)

Usage

Add the following workflow to your repository at .gitea/workflows/ai-pr-review.yml:

name: AI PR Review

on:
  pull_request:
    branches:
      - main
    types:
      - opened
      - synchronize
      - reopened

jobs:
  review:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: <org>/gitea-ai-pr@main
        with:
          api_url: ${{ secrets.AI_API_URL }}
          api_key: ${{ secrets.AI_API_KEY }}
          # model: openai/gpt-oss-120b  # optional, this is the default

Inputs

Input	Required	Default	Description
api_url	Yes	—	Base URL of the OpenAI-compatible API (e.g. https://api.openai.com/v1)
api_key	Yes	—	API key for the endpoint
model	No	openai/gpt-oss-120b	Model identifier
github_token	No	${{ github.token }}	Token used to post comments and fetch PR history

How It Works

1. Fetch context — checks existing PR comments for a previous AI review and the commit SHA it covered.
2. Generate diff — produces a full diff against main, or an incremental diff from the previously reviewed commit if one exists.
3. Run review — calls the configured model via the chat completions API. Incremental runs pass the previous review as conversation history so the model can track resolved and new issues.
4. Post comment — posts the review as a PR comment with a hidden SHA marker used by future runs.

Secrets

Set the following secrets in your Gitea repository settings:

• AI_API_URL — base URL of the API endpoint
• AI_API_KEY — API key

License

MIT