Zig project maintains strict ban on LLM-assisted contributions, citing need to invest in contributors rather than individual pull requests

Zig Software Foundation prohibits LLM use for issues, pull requests, and comments on its bug tracker. Bun, a JavaScript runtime written in Zig and acquired by Anthropic in December 2025, operates its own fork of Zig and does not plan to upstream a 4x performance improvement to Zig's compiler because of this ban.

Zig's rationale centers on what VP of Community Loris Cro calls "contributor poker" — betting on the person, not the contents of their first pull request. The project prioritizes growing new contributors into trusted, prolific team members over accepting perfect code submitted by LLMs (AI systems that generate text).

Accepting LLM-assisted contributions breaks this model: time spent reviewing work written by an LLM does not help the Zig team build confidence in a new contributor or develop their skills, making the review effort inefficient compared to maintainers solving the same problem themselves.