Guillermo Rauch promotes fx.sh, a 6MB model-agnostic coding CLI

Guillermo Rauch promotes fx.sh, a coding CLI he says is 6MB, starts in milliseconds and works with any model.

In an X post, he criticizes coding CLIs that rely on growing daemons, layered TUIs and client-server architectures, and presents fx.sh as a simpler alternative. He says fx.sh has MCP, Skills, Subagents and ACP built in.

The post is Rauch's own claim. It includes no independent benchmarks or user reports on startup time or size.