Vercel's open-source Zig coding agent fx ships v0.0.15 with 70% less memory, 6.15 MiB binary
evilrabbit_ · x · 2026-10-29
rauchg shared Vercel's open-source coding agent fx v0.0.15, demoed running in a phone browser:
- v0.0.15 gains: 70% less memory in long sessions; binary down to 6.15 MiB; image-heavy turns up to 3.3× faster; 18% faster session resumes; new /fork command and automatic model catalog refresh
- Positioning: a minimalist coding agent harness/CLI written in Zig, Apache-2.0, model-agnostic, with Unix-shell-like output rather than a terminal IDE
- Notable: compiles to WebAssembly to run the full CLI in-browser (networking via fetch, workspace powered by just-bash); embeddable via libfx with custom tools, skills, and MCP servers; concise tool schemas keep context small; works with local models, gateways, or direct provider APIs
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