PR-Agent is the open-source engine that originally powered Qodo Merge, now handed over to a community-owned organization and released under the Apache 2.0 license rather than staying tied exclusively to Qodo's commercial product. It works across GitHub, GitLab, Bitbucket, Azure DevOps, and Gitea, analyzing pull request diffs and responding to simple commands like /review, /improve, /describe, and /add_docs.
Typing /review on a pull request triggers a full diff analysis covering bugs, security issues, and best-practice violations, returned as a single structured, severity-rated comment rather than a scattered stream of inline notes. It can also autogenerate PR descriptions, suggest improvements, generate changelog updates, and even help with test generation, and it's flexible about which model does the actual analysis, supporting OpenAI, Claude, Gemini, DeepSeek, and others.
It deploys as a GitHub Action, a CLI tool, a webhook, or a Docker container, giving teams several ways to adopt it depending on their existing CI setup, and being open source and free gives it a real edge for teams that want PR review tooling without an ongoing per-seat subscription.