Relicensing with AI-Assisted Rewrite (tuananh.net)

In a groundbreaking move, the maintainers of the chardet library have announced a significant re-licensing from LGPL to MIT by utilizing AI, specifically Claude Code, to rewrite their codebase entirely. This shift aims to address long-standing licensing complexities stemming from chardet’s original LGPL designation, which posed problems for corporate users. However, this decision has sparked controversy, as the original author claims that the rewrite, being informed by prior LGPL code, may constitute a derivative work that must remain under the original license, creating potential legal pitfalls for the maintainers. The implications of this case extend beyond chardet and pose a substantial challenge to the future of open-source licensing, particularly in relation to AI-generated content. With a recent Supreme Court ruling reinforcing a "Human Authorship" requirement, questions arise about the legal standing of AI-generated code. If such code cannot be copyrighted, the maintainers may lack the authority to license their rewritten version. Furthermore, if accepted, AI-assisted rewrites could undermine copyleft principles, allowing anyone to transform GPL-licensed software and release it under less restrictive terms, fundamentally altering the landscape of open-source software licensing. The chardet v7.0.0 case is positioned as a pivotal test of these evolving legal and ethical boundaries in the AI/ML community.