Developer Ankur Sethi built a new programming language called Cutlet using Claude Code over four weeks in early 2025. Named after his cat, Cutlet runs on both macOS and Linux and can execute real programs. Sethi let Claude generate every line of code without reading it himself, instead building automated guardrails to verify correctness.

This experiment pushed the boundaries of AI-assisted development. Sethi had previously used LLMs for boilerplate and targeted changes but never for complete projects. The results surprised him - Cutlet features arrays, strings, functions, loops, objects, prototypal inheritance, and a garbage collector. The language includes unique features like the @ meta-operator for vectorized operations and array filtering.

Sethi chose this project to test agentic engineering's limits and answer questions about AI's role in software development. He wanted to compress months of work into weeks and explore what daily development would look like with full LLM integration. The experiment succeeded beyond his expectations, though he maintains that human developers won't be replaced entirely. Cutlet demonstrates both the current capabilities and limitations of AI-assisted programming.