FuXi

English | 简体中文

FuXi is a fast, self-contained terminal AI coding agent. It reads code, edits files, runs commands, and drives tools from a rich TUI, with cost-aware routing across LLM providers and automatic failover. Built in Go, it ships as one static binary with no runtime dependencies.

Terminal-first · Provider-agnostic · Bring your own key · MCP client · Self-updating

Homepage: https://www.fuxicode.com

FuXi's roughly 2 million lines of code were written entirely by FuXi itself.

Install

macOS / Linux

curl -fsSL https://downloads.fuxicode.com/bootstrap.sh | bash

Windows (PowerShell)

irm https://downloads.fuxicode.com/bootstrap.ps1 | iex

Windows (CMD)

curl -fsSL https://downloads.fuxicode.com/install.cmd -o "%TEMP%\fuxi-install.cmd" && "%TEMP%\fuxi-install.cmd"

Then verify and launch:

fuxi --version
fuxi doctor    # environment sanity checks
fuxi           # start a session

Install and upgrade are the same command. Full options, uninstall steps, and troubleshooting: setup docs.

Get started

A FuXi account is required. Run fuxi, then:

1. Register and sign in — fuxi login (or fuxi setup-token for headless/CI). Registration processes only minimal account data.
2. Connect a model (optional) — sign-in gives access to FuXi-managed models; to use your own provider instead, set an API key via environment variable or ~/.fuxi/config.yaml (fuxi init generates a template). Or run fuxi wizard.

Then type a prompt and press Enter, for example:

Fix the failing tests in this repository.

Useful commands: /model switch models · /help browse all commands · /config open settings · /privacy-settings privacy controls · /exit quit.

Full walkthrough: usage guide.

Permissions

Sensitive tool calls ask for approval unless you change the permission mode at launch.

--dangerously-skip-permissions starts in bypassPermissions, so tool calls run without a prompt. Extreme commands such as rm -rf / are still blocked. Use it only in a container or VM; on Linux and macOS, root and sudo are rejected.

--allow-dangerously-skip-permissions keeps the normal mode and adds bypassPermissions to the Shift+Tab cycle.

--permission-mode bypassPermissions behaves like --dangerously-skip-permissions. The same flag also accepts default and plan.

Data, privacy, and retention

FuXi runs on your machine and keeps your work local.

• By default, your code and conversations are never collected, stored, or retained by FuXi. With your own key they go straight to the provider you choose; with FuXi-managed models they are transmitted only to serve that request. Conversation content is sent to FuXi only if you explicitly enable send_conversations (off by default).
• Credentials stay in local ~/.fuxi/ and are never uploaded.
• Sessions, checkpoints, memory, and audit logs live on your device and can be deleted at any time by removing the config directory.
• FuXi processes limited account and technical information to operate the service; the available analytics are disclosed and can be turned off. See Privacy Controls.