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  2. fx

fx

Shell-like coding agent, one binary

WHO USES ITTerminal-centric developers · Teams embedding an agent in their own product · Users of ACP-capable editors

Install to use

Vercel Labs' coding agent CLI: a 6.17 MiB Zig binary, shell-like, embeddable via WASM

★ 3k▲ +4 / 7dDaily star increases over 14 days. Hollow bars mean no data. The last day may be partial.2026-09-03 no data2026-09-04 no data2026-09-05 +52026-09-06 +42026-09-07 no data2026-09-08 no data2026-09-09 no data2026-09-10 no data2026-09-11 no data2026-09-12 +22026-09-13 +22026-09-14 no data2026-09-15 no data2026-09-16 no datalargest one-day increase in the 14 days+5last 14 days · stars per dayhollow = no data

2,988 stars · checked on GitHub GitHub check 30 h late · 7-day +4 observed via GH Archive (as of )

BACK CATALOG

The fx.sh landing page: the line 'Tiny, open, native coding agent.', the one-line install command (curl -fsSL https://fx.sh/setup.sh | bash) and the version line (v0.0.10 · 6.17mib · status: experimental), above the fx terminal that runs on the page (WebAssembly build), showing 'fx v0.0.10 · Run /help for commands', an input cursor and the 'auto · kimi-k3' status line.

TESIGN TAKE

An experiment in making a coding agent small and embeddable like a Unix tool rather than an IDE — and the authors themselves label it experimental.

INSTALL

AT A GLANCE

LICENSE
Apache-2.0
USAGE
Commercial use, redistribution OK. Keep notices; mark changes.
LANGUAGE
Zig
PLATFORM
macos · linux · cli
ACTIVITY
last commit 1 day ago () · latest release v0.0.10 () · 10 releases
COMMUNITY
18 contributors · 229 open issues (incl. PRs) · made by: an organization
SOURCES
GitHub
OPEN SOURCE
YES
FIRST SEEN
CATEGORY
DEV TOOLS · AI

A summary, not legal advice.

WHY IT MATTERS

A coding agent from Vercel Labs with a different shape: one 6.17 MiB native binary written in Zig, with an interface closer to a Unix shell than an IDE in the terminal. It is model-agnostic — sign in with Vercel AI Gateway, a ChatGPT subscription (Codex OAuth) or a Grok subscription — and the same core builds to fx-core.wasm and fx-term.wasm, published to npm as libfx for Node.js, browser and Next.js hosts. fx acp connects it to editors and other Agent Client Protocol clients.

BUILD FROM THIS

  • With libfx you can embed a coding-agent terminal inside your own web app or internal tool (Node.js, browser, Next.js and Nuxt examples are provided), and extend the agent with skills, MCP servers and subagents.

WHO IT'S FOR

Terminal-centric developers
a light single-binary coding agent
Teams embedding an agent in their own product
libfx (WASM) embedding
Users of ACP-capable editors
connect the agent with fx acp

START IN 5 MINUTES

# curl -fsSL https://fx.sh/setup.sh | bash
# fx login          # Vercel AI Gateway (fx login codex for a ChatGPT subscription, fx login grok for Grok)
# cd your_project
# fx
# fx ask "explain the changes in this repository"

CAVEATS

  • Licence Apache-2.0. README status: 'Experimental. Use at your own risk', and the homepage warns of frequent changes. Model costs are separate: you need a Vercel AI Gateway key/account or a paid ChatGPT or Grok subscription. The homepage lists macOS and Linux as operating systems; Windows support [확인 필요]. The WebAssembly SDK is also experimental, and building from source needs Zig 0.16.0+.

RECEIPT

FIRST SEEN
AT SOURCE
KEPT
CREATED → FIRST SEEN
33d
SOURCES
GitHub
◌ BACK CATALOG
Reconstructed from archive data, not a live discovery.

The same facts in machine-readable form — View as Markdown · JSON

SIMILAR TOOLS

Up to five from DEV TOOLS by ★ total: edited entries first, then repository cards; this entry is highlighted. Drawn from the same stored snapshot as the rankings — a comparison, not a recommendation.

IMAGENAME★ TOTAL▲ 7dLICENSEPLATFORMLAST PUSH
ECC README banner: headline 'The operating system for AI agent harnesses', harness chips, and skill, agent and command lists.
eccSkills, memory and security for agents★ 259k▲ +832MITpermissivewindows · macos · linux · cli
DeepSeek Harness landing: blue background, the headline 'Everything is a plugin' and a quick-start box with the npx command.
DeepSeek HarnessPlugin agent harness for developers★ 225k▲ +1,356MITpermissiveweb · cli
ponytail.dev landing page: a line-drawn developer with a ponytail on black, the title 'ponytail' and an install button.
ponytailMake your agent write less code★ 139k▲ +1,068MITpermissive—
Spec Kit docs landing page — the headline 'Build with a spec, fix a bug, or assess an idea' and the uv tool install specify-cli command
Spec KitSpec-first process for coding agents★ 137k▲ +560MITpermissivecli · windows · macos · linux
The fx.sh landing page: the line 'Tiny, open, native coding agent.', the one-line install command (curl -fsSL https://fx.sh/setup.sh | bash) and the version line (v0.0.10 · 6.17mib · status: experimental), above the fx terminal that runs on the page (WebAssembly build), showing 'fx v0.0.10 · Run /help for commands', an input cursor and the 'auto · kimi-k3' status line.
fxShell-like coding agent, one binaryTHIS ENTRY★ 3k▲ +4Apache-2.0permissivemacos · linux · cli

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TIMELINE

  1. Repository created
  2. FIRST SEEN BY TESIGN ◌ BACK CATALOG