GitHub Pushes Amendments to California AI Law to Protect Open Source

GitHub has joined forces with Black Forest Labs, Hugging Face, and Mozilla Corporation to advocate for critical amendments to California's AI Transparency Act (SB 942). The coalition argues that the law's current language could unintentionally disrupt open source development by conflicting with the fundamental principles of open source licensing.

At the center of the dispute is a provision requiring developers to revoke licenses if downstream users fail to meet specific obligations. Open source licenses are designed to be irrevocable, ensuring developers can freely build, reuse, and share code. The proposed requirement would undermine this principle, creating uncertainty across the software supply chain, particularly for community-driven projects.

California’s AI Transparency Act, signed into law on September 19, 2024, aims to regulate generative AI by mandating content labeling, watermarking, and AI detection tools. While these measures are set to take effect on August 2, 2026, GitHub and its coalition partners argue that the current bill’s approach to licensing unnecessarily complicates compliance for open source developers without advancing the law’s core goals.

The coalition has proposed an alternative inspired by the European Union's AI Act. Instead of requiring license revocation, the EU’s framework encourages best practice documentation and transparency notifications for downstream users. This model preserves the open source ecosystem's collaborative nature while supporting AI accountability.

"Getting this balance right is critical," GitHub stated, emphasizing that amendments to SB 942 would ensure California remains a hub for AI innovation without jeopardizing the open source software that underpins much of AI development. The coalition’s letter argues that developers modifying and deploying AI systems are already covered by the law and that enforcement measures can still hold bad actors accountable without overhauling licensing norms.

The timing is pivotal. SB 942 is part of California’s broader regulatory push, which also includes the Transparency in Frontier Artificial Intelligence Act (SB 53). While SB 53 has already taken effect as of January 1, 2026, focusing on safety and reporting obligations for frontier AI models, SB 942 targets consumer-facing transparency measures. Together, these laws cement California's position as a leader in U.S. AI governance.

For open source developers and AI stakeholders, the stakes are high. Missteps in implementation could dampen innovation in a sector where collaboration is key. Developers and civil society are encouraged to provide feedback to policymakers to shape a law that supports transparency without sacrificing the principles of open source development.

The full coalition letter is available here. Stakeholders can also share their perspectives directly with California policymakers through this portal.