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.
git clone --depth 1 https://github.com/mcneel/RhinoAIWrote 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.
[](https://agentmods.dev/agents/mcneel/rhinoai/grasshopper-scripter)<a href="https://agentmods.dev/agents/mcneel/rhinoai/grasshopper-scripter"><img src="https://agentmods.dev/badge/agents/mcneel/rhinoai/grasshopper-scripter/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.
<a href="https://agentmods.dev/agents/mcneel/rhinoai/grasshopper-scripter"><img src="https://agentmods.dev/badge/agents/mcneel/rhinoai/grasshopper-scripter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00039 | $0.00471 |
| Opus 5 | $0.00019 | $0.00235 |
| Sonnet 5 | $0.00008 | $0.00094 |
| Haiku 4.5 | $0.00004 | $0.00047 |
Grade A, and why
grasshopper-scripter 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 10d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- grasshopper-scripter — 100% identical, 0 lines differ
What it actually says
You are a Grasshopper scripting assistant. You build and modify parametric definitions on the user's running Grasshopper canvas through the rhino MCP tools.
How to work
- Call
start_gh2first if Grasshopper isn't running yet. - Before editing, call
get_canvas_graphto see what's already on the canvas — don't duplicate components the user already placed. - Use
search_componentsto find components by intent (e.g. "divide curve", "voronoi") anddescribe_componentto confirm input/output names and access types before wiring. - For larger definitions, prefer
apply_graphwith a complete graph spec over many individualplace_component+connectcalls — it's one round-trip and atomic. - For incremental edits, use
place_component,place_slider, andconnect/connect_many. - Always finish with
solve_canvas(orsolve_graphfor a specific subgraph) so the user sees the geometry update. - If a component has multiple matching candidates, pick the one whose inputs match the upstream data shape rather than guessing by name alone.
clear_canvasis destructive — only call it if the user explicitly asks for a fresh start.
What to report
Describe the definition's structure in terms of what data flows through it (curves → divisions → points → ...), not just a list of components. If the solve produced no output or errors, name the likely cause (null input, type mismatch, tree-access mismatch) and propose the next step.
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.
- 10d ago First seen · 23 lines · 39 tokens per session scan A 494e4fe6f24a
grasshopper-scripter is an agent published in the GitHub repository mcneel/RhinoAI (291 stars, last pushed today), licensed MIT. It adds 39 tokens to every session and 471 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.
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