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DevKitPro Deck MCP Server

by linuxkafe
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DevKitPro Deck

CI

Decky Loader plugin to control the devkitpro toolchain on the Steam Deck. devkitpro runs inside a rootless podman container and exposes a Model Context Protocol (MCP) server that this OpenCode session consumes for Nintendo 3DS compilation.

Features

  • On-demand service control — start/stop the MCP server from the Decky overlay in Gaming Mode

  • Status panel — image present, container running, toolchain version

  • Toolchain info — devkitARM version, libctru, 3dsx.specs, examples

  • CLI — devkitpro-deck command for SSH/headless control

  • MCP server — exposes compile_3ds, clean, toolchain_status, list_libraries, list_groups tools to OpenCode

Related MCP server: MCP Build Environment Service

Architecture

Steam Deck (deck@steamdeck)
├── podman container (docker.io/devkitpro/devkitarm)
│   ├── devkitARM 16.1.0
│   ├── libctru
│   ├── dkp-pacman
│   └── 3DS examples
├── MCP server (mcp/server.py) — stdio transport
├── Decky plugin (main.py + src/index.tsx)
└── CLI (cli.py)

Prerequisites

  • Steam Deck with Decky Loader installed

  • Rootless podman (comes with SteamOS)

  • devkitpro image pulled (the plugin can pull it)

Installation

Quick

curl -fsSL https://raw.githubusercontent.com/linuxkafe/deck-3dsdevkit/main/install.sh | sh

GitHub repository →

The installer downloads the plugin, installs it to the Decky plugins directory, and restarts the plugin loader.

Manual

# Clone and copy
git clone https://github.com/linuxkafe/deck-3dsdevkit.git
sudo cp -r deck-3dsdevkit /home/deck/homebrew/plugins/devkitpro-deck
# Restart Decky (Settings > Reload)

Usage

Decky Plugin

Open Game Mode → Decky → DevKitPro Deck. Shows:

  • Image status (present/missing)

  • Container status (running/stopped)

  • Toolchain version

  • Pull button if image missing

CLI

devkitpro-deck status        # Full status JSON
devkitpro-deck pull          # Pull the devkitpro image
devkitpro-deck toolchain     # Toolchain info
devkitpro-deck version       # Plugin version

MCP Tools (OpenCode)

Once the MCP server is running, this OpenCode session can use:

Tool

Description

compile_3ds(source_path)

Compile a 3DS project to .3dsx

clean(project_path)

Clean build artifacts

toolchain_status()

Check toolchain health

list_libraries()

List available libraries

list_groups()

List predefined groups

Troubleshooting

Image not found

devkitpro-deck pull

Plugin not loading

  • Restart Decky: Settings → Reload

  • Check logs: journalctl -u plugin_loader

Container not starting

podman run --rm docker.io/devkitpro/devkitarm echo "OK"

License

MIT

This server cannot be deployed

Shareable, User-Owned Context BackendPeople, applications, and agents read, write, and coordinate together in one context lake. Reach it over MCP, a CLI, a Python SDK, or REST.fulcradynamics.comAd

Maintenance

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Resources

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