I tried a Claude Code alternative that's local, open source, and completely free - how it works

I was curious if Block's Goose agent, paired with Ollama and the Qwen3-coder model, could really replace Claude Code. Here's how I got started.

NASA used Claude to plot a route for its Perseverance rover on Mars

This past December, Perseverance successfully completed a route through a section of the Jezero crater plotted by Anthropic's ...