A code-review bot that costs zero dollars per pull request sounds like a compromise. It is not. A free model with a self-hosted server catches missing tests, dead code, and broken error handling as well as paid tiers do for common cases. The trick is choosing the right endpoint and wiring a trigger that runs on every PR. This guide uses MonkeyCode, an open-source AI coding assistant, for exactly that setup. Disclosure: This article was prepared as part of MonkeyCode's product outreach. Monkey...