In a blog post dated June 23, 2026, GitHub announced it joined an open source coalition with Black Forest Labs, Hugging Face, and Mozilla Corporation calling for targeted amendments to California's AI Transparency Act. The coalition argues that the bill's current license-revocation language conflicts with how open source licenses operate, which are designed to be perpetual and irrevocable, and that the requirement to revoke licenses for downstream users would introduce uncertainty across the software supply chain. The coalition recommends aligning California's approach with the EU AI Act's treatment of open source, which emphasizes notification and best-practice documentation rather than license revocation. GitHub's post includes a direct call to review the coalition letter and provide technically grounded feedback.