Borrowing it
Nothing to install: this file belongs to EaseHee/rhino-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/EaseHee/rhino-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/EaseHee/rhino-mcpWrote 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/instructions/easehee/rhino-mcp/claude-md)<a href="https://agentmods.dev/instructions/easehee/rhino-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/easehee/rhino-mcp/claude-md.svg" alt="Measured on agentmods" 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 | $0.01060 | $0.01060 |
| Opus 5 | $0.00530 | $0.00530 |
| Sonnet 5 | $0.00212 | $0.00212 |
| Haiku 4.5 | $0.00106 | $0.00106 |
Grade A, and why
rhino-mcp CLAUDE.md 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
rhino-mcp
MCP server connecting Claude to McNeel Rhino 8 and Grasshopper.
Architecture
- Standalone:
rhino3dm(headless Python lib) for.3dmI/O. ~234 tools. - Bridge: C# plugin
rhino_plugin/csharp/rhino-mcp.rhpover JSON-RPC 2.0. ~235 tools. - Mode auto-detected at startup (
detect_mode()); override viaRHINO_MCP_FORCE_MODE.
Project layout (top level)
src/rhino_mcp/— Python package (server, tools, bridge transports, prompts, models, utils, data).rhino_plugin/csharp/— C# bridge plugin (Plugin.cs,BridgeServer.cs,CommandDispatcher.cs,Handlers/*.cs,manifest.yml).tests/— pytest (~262 tests).examples/— runnable demo scripts (architectural massing, schedule, sun study, etc.).docs/{en,ko}/— capabilities / configuration / installation / troubleshooting / tools-reference / grasshopper-guide..github/workflows/— CI + release pipelines..claude/— agents, skills, commands, rules, settings.
Development
uv sync
uv pip install -e '.[dev]'
uv run pytest tests/ -v # all tests
uv run ruff check src/ tests/ # lint
uv run mypy src/rhino_mcp # type check
dotnet build rhino_plugin/csharp -c Release
Conventions
- Tool first argument:
args: _InputModel(Pydantic BaseModel). doc_iddefaults to"active".- Shared logic lives in
tools/_helpers.py. Modeenum:STANDALONE/BRIDGE/BOTH.- Commit messages: English title + English body, Conventional Commits, no Co-Authored-By.
- Code comments: English only.
- Korean prose (chat replies,
*.ko.md,docs/ko/**, CHANGELOG entries) uses noun-form endings, no honorifics (-함,-임, or noun direct termination; never입니다 / 합니다 / 하세요).
Procedure docs (lazy-loaded under .claude/rules/)
- Adding a new tool —
.claude/rules/adding-tool.md. - C# handler authoring + RhinoCommon trap list —
.claude/rules/csharp-handler.md. - Korean writing style —
.claude/rules/korean-style.md.
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.
- 7d ago First seen · 79 lines · 1,060 tokens per session scan A df09a26d6e6d
rhino-mcp CLAUDE.md is an instructions file published in the GitHub repository EaseHee/rhino-mcp (5 stars, last pushed 3mo ago), licensed MIT. It adds 1,060 tokens to every session, about $0.0053 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 2026-08-31.
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