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fx

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

AI Agents / Agents · Apache-2.0 · 3.5k

Reviewed 2026-09-27 · last push 2026-10-19 · repo checked 2026-10-19

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.

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