Rig A Model

What it does

When your agent uses it

• The user have an existing GLB and want to rig it
• Make it posable
• Make it animatable — rig this model
• Add a skeleton to my GLB

Example prompts

• “rig this model”
• “add a skeleton to my GLB”
• “make this character animation-ready”
• “/rig-a-model”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

1. 1Give the user the pose-studio link — pose and preview in the browser.
2. 2Give the riggedGlbUrl for download / import; it carries a humanoid
3. 3The original mesh is never modified — sourceGlbUrl stays valid.

What it can do on your machine

Read from SKILL.md and the folder at commit 238ef60. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • curl

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • three.ws

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Rig A Model loads about 1.1k tokens when it runs. Until then it costs about 102 tokens; SKILL.md has 351 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~102

When it runs · the whole SKILL.md, loaded when a task matches

~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from nirholas/three.ws at commit 238ef60, republished under its MIT licence (© nirholas). 351 words, ~1,072 tokens.

name

rig-a-model

description

Auto-rig a static 3D GLB model into an animation-ready one. Use when you or the user have an existing GLB and want to rig it, add a skeleton, add bones, make it posable, or make it animatable — "rig this model", "add a skeleton to my GLB", "make this character animation-ready". Takes a GLB URL, adds a humanoid skeleton plus skin weights, and returns the rigged GLB URL and a pose-studio link.

when_to_use

User already has a GLB (a URL) and wants it rigged. To generate a new model from text, use generate-3d-model; to generate an already-rigged character in one…

license

MIT

metadata.category

3d/creative

metadata.cross-platform-safe

true

metadata.pack

three-ws-skills

curl -s -X POST https://three.ws/api/mcp-studio \
  -H 'content-type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "rig_mesh",
      "arguments": { "glb_url": "https://three.ws/avatars/cesium-man.glb" }
    }
  }'

{
  "ok": true,
  "riggedGlbUrl": "https://three.ws/cdn/creations/def456/rigged.glb",
  "sourceGlbUrl": "https://three.ws/avatars/cesium-man.glb",
  "poseStudioUrl": "https://three.ws/pose?src=https%3A%2F%2Fthree.ws%2F...",
  "jobId": "r9k2m7x4",
  "durationMs": 48000
}

# 1. Start the rig job
curl -s -X POST "https://three.ws/api/forge?action=rig" \
  -H 'content-type: application/json' \
  -d '{ "glb_url": "https://three.ws/avatars/cesium-man.glb" }'
# → { "job_id": "r9k2m7x4", ... }

# 2. Poll until done (every ~3s, budget ~180s)
curl -s "https://three.ws/api/forge?job=r9k2m7x4" -H 'accept: application/json'
# → { "status": "done", "glb_url": "https://.../rigged.glb" }  (or "failed" / still "running")

© nirholas, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/rig-a-model of nirholas/three.ws.

Open the folder on GitHubat commit 238ef60