The article examines how AI coding agents can rapidly create "clean room" implementations of open source code, raising legal and ethical questions. This is highlighted by the recent controversy around chardet, a Python library that was rewritten with an MIT license despite originally being LGPL-licensed. The case demonstrates how AI tools are accelerating code recreation while challenging traditional open source licensing norms.
Background
Clean room implementation is a long-standing software development technique where one team analyzes existing code to create specifications, which a separate team uses to build new code without seeing the original. This approach has historically been used to avoid copyright infringement while creating compatible software.
- Source
- Simon Willison
- Published
- Mar 6, 2026 at 12:49 AM
- Score
- 7.0 / 10