ValheimCli

Let AI agents read game state, take screenshots and control your character through a local CLI. Movement, combat, UI buttons and console commands use game methods without moving your mouse or taking window focus. Bring your own agent; no AI model is included.

Install

Install ValheimCli and BepInEx through your mod manager, or extract the Thunderstore download into your BepInEx installation. Only the player being controlled needs the mod.
To use the CLI, install Node.js 22+, download valheim-agent-cli-0.4.0.tgz from GitHub Releases, then run this in the download folder:
```
npm install -g ./valheim-agent-cli-0.4.0.tgz
```

Only the CLI needs Node.js. The CLI is written in JavaScript; Node.js runs it and sends commands to the game mod. The C# mod runs inside Valheim through BepInEx without Node.js. Both run on the game computer; no specific mod manager or modpack is required. Exit Valheim before upgrading, and remove the old ValheimCliBridge mod if installed.

Enable control

Launch the modded game once, exit, then edit BepInEx/config/swear01.ValheimCliBridge.cfg:

[Permissions]
AllowControl = true

Relaunch the modded game. Console access is optional: set AllowConsole = true and launch with -console. Normal command permissions still apply.

Use

Replace <folder> with the folder containing BepInEx: your game folder for a manual install, or your mod manager's profile folder.

valheim status --profile "<folder>"
valheim observe --profile "<folder>" --image frame-001.png
valheim input --profile "<folder>" --move-z 1 --ms 300 --confirm
valheim stop --profile "<folder>"

These check the connection, capture a screenshot, walk forward briefly and stop movement. Check status and a fresh screenshot after an action to verify the result; use a new image filename each time.

Use valheim ui-list to discover buttons, valheim ui to activate them, and valheim console to run a command directly. All need the same --profile; UI actions and console commands also need --confirm. Run valheim --help for all options.

Windows Agent mode

After setup, exit Valheim and run:

valheim launch-agent --profile "<folder>" --game "<path/to/valheim.exe>" --confirm

This starts the game on an isolated Windows desktop. No game window appears on your normal desktop; use status to check readiness and the CLI to interact. The game still renders and uses the GPU.

Before you play

Experimental: multiplayer and long sessions remain unverified. Start in a test world.
Keep swear01.ValheimCliBridge.token private. Connections are local only.
stop cancels movement; F12 in the focused game also disables control and console access. Neither undoes completed actions. After a timeout, inspect state before trying again.
Standard Unity UI buttons are supported, including compatible mod buttons. Text entry and some custom UI are unsupported.

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