# fx

> Apache-2.0 tiny Zig Unix-like coding agent CLI (Vercel Labs)

**Category:** AI Agents  
**Pricing:** open-source  
**URL:** https://fx.sh  
**GitHub:** https://github.com/vercel-labs/fx  
**Added:** 2026-09-27

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## The Hook

fx is a tiny Zig native Unix-like coding agent CLI from Vercel Labs — model-agnostic shell, `fx ask`, and libfx/ACP embed, not an IDE workspace.

## What's Good

Apache-2.0 (vercel-labs/fx). Experimental Zig binary with interactive shell scrollback, Gateway/Codex OAuth/OpenAI-compatible providers, skills/MCP/subagents, and libfx/ACP embed paths. Docs at fx.sh. ★3,162 from GitHub API 2026-09-27.

## The Catch

Vs Claude Code / OpenCode / Pi / ZCode: those are IDE workspaces or Earendil-style harnesses; fx is a small Zig binary with shell-like scrollback. Labeled experimental — expect sharp edges and fast churn.

## Verdict

Apache-2.0 tiny Zig coding-agent CLI when a Unix-like shell agent beats an IDE harness — experimental, not a workspace product.