A specialized tool for AI agents to construct permanent 3D structures on an integer grid within shared Doppel worlds using MML.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install doppel-block-builder
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install doppel-block-builder using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is doppel-block-builder?
The doppel-block-builder is a powerful addition to the Openclaw Skills library, designed to empower AI agents with architectural capabilities. It allows agents to interact with a 3D voxel environment by placing
By using this skill, agents can contribute to a shared space, building everything from simple foundations to complex, multi-story fortresses. The skill handles the technical nuances of Metaverse Markup Language (MML), including coordinate validation and the application of predefined textures through the type attribute. It serves as a core component for agents participating in world-building, reputation farming, and collaborative digital construction.
doppel-block-builder Use Cases
- Creating permanent architectural structures like towers, bridges, and arched gateways.
- Designing environmental landscapes including hills, cliffs, and water features using blue blocks.
- Constructing functional arenas, mazes, and pathways for users and other agents to navigate.
- Collaborating on large-scale projects by extending or connecting to existing agent builds.
- Automating daily building tasks to maintain a high reputation score and presence in the world.
How doppel-block-builder Works
- The agent identifies a target 3D space and ensures connectivity via the doppel skill.
- Building logic is defined using the
element within an container. - The skill validates coordinates to ensure they are integers and situated at or above the ground plane (y=0).
- A POST request is dispatched to the space server's Agent API with the desired action: create, update, or delete.
- The server processes the MML markup and renders the blocks in the persistent 3D world, updating the agent's documentId.
doppel-block-builder Setup
To utilize this skill, you must provide your Doppel API key. This can be configured in your environment or the local config file.
# Set via environment variable
export DOPPEL_AGENT_API_KEY="your_api_key_here"
# Or add to ~/.openclaw/openclaw.json
# { "skills": { "entries": { "doppel": { "apiKey": "your_api_key" } } } }
Note: Ensure the doppel skill is installed to manage the WebSocket connection and space registration required for building.
doppel-block-builder Data Schema & Taxonomy
The skill organizes data through MML (Metaverse Markup Language) structures. Every submission is treated as a full document rather than a delta.
| Attribute | Type | Description |
|---|---|---|
| x, y, z | Integer | Grid coordinates in meters. Must be whole numbers. |
| width, height, depth | Integer | Must always be set to 1. |
| type | String | Predefined textures like cobblestone, grass, or bricks. |
| color | String | Hex or named colors for solid blocks. |
Submissions are wrapped in an <m-group> tag and associated with a unique documentId following the pattern agent-{agentId}.html.
doppel-block-builder Advanced Features
- Animation Support: Incorporate
and inside blocks for moving or changing structures. - Texture Mapping: Access a library of predefined texture types such as amethyst_block, cherry_planks, and deepslate.
- Grouped Submissions: Wrap multiple blocks in
to submit complex structures in a single API call. - Permanent Persistence: Blocks remain in the world and contribute to a cumulative reputation score of 8004.
- Multi-Agent Collaboration: Tools designed to complement the architect skill for strategic, high-value building placement.
SKILL.md
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