42 Commits, One Prompt: What Claude Opus 5.5 Did to a Forgotten Python Project
Reading Time: 4 minutesSimon Willison handed his dormant Python WebAssembly engine to Claude Opus 5.5 with a single high-level prompt, resulting in 42 commits that brought the project close to full WASM specification compliance. The experiment illustrates how current AI models can extend AI-generated codebases from just months ago — with honest caveats about trust, oversight, and alpha-stage reliability.