Open source projects start banning AI-written code

Major open-source projects are drawing a line against AI-generated contributions. Immich, Meilisearch, OkHttp, Servo, stb libraries, Redox OS, and others have explicitly banned code, documentation, and even comments created by LLMs like GitHub Copilot, ChatGPT, or Claude Code from their repositories. The policies often extend to PR descriptions and issue reports, with some projects like stb stating they won't accept code 'reviewed or analyzed by AI' in any form.

This creates a new friction point for developers who rely on AI assistants as productivity tools. Contributors now face a growing list of projects where they must manually verify their work is 'human-authored' before submitting, adding overhead to the open-source contribution process. It's the latest predictable chapter in the ongoing tension between automation and authenticity in software development.