vercel-labs/fx

Unix like coding agent observed · 2026-08-28

github.com/vercel-labs/fx · homepage · Zig · Apache-2.0 (permissive) observed · 2026-08-28

Health v2 · maintenance only

79/100

Activity 99
Release rhythm 99
Longevity 1

Flags: young

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.

gap_med: 1
age_days: 22
days_rel: 9
days_push: 7
n_releases_24m: 6

Full methodology

Adoption not part of the score

2495 stars · 266 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

fx is a tiny, open-source coding agent harness and CLI written in Zig, designed for minimalism, fast cold starts, and embeddability in larger systems. It offers a Unix shell-like terminal experience, model-agnostic inference via Vercel AI Gateway, OpenAI Codex, or xAI Grok, and embeds into JavaScript apps via libfx (native addon and WebAssembly builds).

Use cases

run an AI coding agent in the terminal
embed a coding agent into my own application
add an agent runtime to an editor via ACP
run a coding agent in the browser with WebAssembly
automatically draft pull requests and issues from a repo
use my ChatGPT or Grok subscription for AI coding assistance
run a lightweight agent in resource-constrained sandboxes

When to choose

you want a minimal, fast, low-memory coding agent CLI
you need to embed an agent runtime in Node or browser apps
you prefer a shell-like terminal experience over heavy TUI IDEs
you want model-agnostic access across multiple providers and MCP servers

When to avoid

you need a stable, production-hardened tool - it is explicitly experimental
you want a rich IDE-like TUI with extensive visual features
you need Windows support - only macOS and Linux are supported

Facets

cli-tool · maturity experimental

agent-framework cli llm-inference mcp developer-tools developer-tools artificial-intelligence cli wasm browser coding-agent agent-harness zig acp embeddable model-agnostic terminal-ui wasm command-line ai-agents macos linux nodejs

8 sources

readme: https://github.com/vercel-labs/fx · fetched 2026-08-28 · 47dca8e9271a
homepage: https://fx.sh · fetched 2026-08-29 · 3014c2a7c692
site_page: https://fx.sh/docs/using-fx/cli · fetched 2026-08-29 · 2cfa3e71e0b4
site_page: https://fx.sh/docs · fetched 2026-08-29 · 9116e92ce9b2
site_page: https://fx.sh/docs/lib · fetched 2026-08-29 · 53373b2ca204
site_page: https://fx.sh/docs/lib/host-integration · fetched 2026-08-29 · cf1c2a54e4d3
site_page: https://fx.sh/docs/getting-started/installation · fetched 2026-08-29 · 844a0d9896a6
site_page: https://fx.sh/changelog · fetched 2026-08-29 · 8aab74d19bb4

Member repositories

Repository	Role	Health v2
vercel-labs/fx	main	79

For agents

markdown · JSON · MCP: product_card(name="vercel-labs/fx")

Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem