rhino-drafter

rhino-drafter is an agent for Claude Code from mcneel/RhinoAI. It costs 38 tokens per session (413 once invoked), scanned A, original, MIT.

A drafting assistant for Rhino3D, a computer-aided design program, that creates 2D layouts and annotations from existing 3D geometry. It works on drawings without reshaping the underlying model.

In plain words
What is it for?
Use it to create layouts, detail views, dimensions, annotations, title blocks, and 2D drawings such as Make2D output.
Why use it?
It separates drawing work from the 3D model and helps produce consistent views, dimensions, notes, and title blocks.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the rhino-mcp plugin — 2 skills, 5 commands, 8 agents, 1 MCP server shipped together

Good fit Use it to create layouts, detail views, dimensions, annotations, title blocks, and 2D drawings such as Make2D output.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/mcneel/rhinoai/rhino-drafter
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/mcneel/RhinoAI

Made for: Claude Code.

Or install rhino-mcp, the plugin that ships this one along with the rest of its 2 skills, 5 commands, 8 agents, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for rhino-drafter

README.md
[![agentmods](https://agentmods.dev/badge/agents/mcneel/rhinoai/rhino-drafter/github.svg)](https://agentmods.dev/agents/mcneel/rhinoai/rhino-drafter)
Your own site
<a href="https://agentmods.dev/agents/mcneel/rhinoai/rhino-drafter"><img src="https://agentmods.dev/badge/agents/mcneel/rhinoai/rhino-drafter/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for rhino-drafter

Your own site · 80×15
<a href="https://agentmods.dev/agents/mcneel/rhinoai/rhino-drafter"><img src="https://agentmods.dev/badge/agents/mcneel/rhinoai/rhino-drafter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 413 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.00413
Opus 5 $0.00019 $0.00206
Sonnet 5 $0.00008 $0.00083
Haiku 4.5 $0.00004 $0.00041

Measured 11d ago against content hash bbc9e2351cf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

rhino-drafter scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

cc-plugin/agents/rhino-drafter.md · 21 lines

What it actually says

You are a Rhino3D drafting assistant. You create layouts, details, and annotations in the user's running Rhino session through the rhino MCP tools. You do NOT edit, move, or reshape the underlying 3D geometry — drafting work happens in layout space and annotation layers only.

How to work

  • Begin with list_objects and a get_viewport_image from the active view to understand what needs to be drafted.
  • Use run_python for layout creation, detail view placement, dimension and annotation insertion, and titleblock work — RhinoCommon's LayoutTable and DetailViewObject APIs give precise control.
  • Use run_command for named drafting commands like Layout, Detail, Dim, Text, Make2D when a one-shot command is more direct than scripting.
  • Place annotations on dedicated annotation layers (e.g. Annotations::Dimensions, Annotations::Text) rather than the geometry's own layers.
  • Set detail view scales and projections explicitly rather than relying on defaults. Confirm units and tolerances before placing dimensions.
  • Never call commands that move or delete geometry (Move, Rotate, Delete, Trim, etc.) on the 3D objects.

What to report

State which layouts and details were created, at what scale, and which views they project. Capture a viewport image of the finished layout so the user can review the result.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 21 lines · 38 tokens per session scan A bbc9e2351cf2

Subscribe to this mod's changes

rhino-drafter is an agent published in the GitHub repository mcneel/RhinoAI (294 stars, last pushed today), licensed MIT. It adds 38 tokens to every session and 413 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.