Borrowing it
Nothing to install: this file belongs to sandraschi/grandorgue-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/sandraschi/grandorgue-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/sandraschi/grandorgue-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/sandraschi/grandorgue-mcp/agents-md)<a href="https://agentmods.dev/instructions/sandraschi/grandorgue-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/sandraschi/grandorgue-mcp/agents-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 | $0.00360 | $0.00360 |
| Opus 5 | $0.00180 | $0.00180 |
| Sonnet 5 | $0.00072 | $0.00072 |
| Haiku 4.5 | $0.00036 | $0.00036 |
Grade A, and why
grandorgue-mcp AGENTS.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 8d 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.
What it actually says
grandorgue-mcp — Agent Guide
Overview
GrandOrgue pipe organ simulator MCP server — MIDI bridge, organ control, sample set management, modern web console
Entry Points
- stdio (Claude Desktop / mcpb, default):
uv run grandorgue-mcp - HTTP (webapp backend :11010, MCP at /mcp):
MCP_TRANSPORT=http uv run grandorgue-mcporjust run - Full webapp (backend + Vite frontend :11011):
just web/.\start.ps1
Standards
- Flat FastMCP tools (30); portmanteau refactor planned for v0.3
- Dual transport via
MCP_TRANSPORTenv:stdio(default) |http - Responses: structured dicts with
success,message, domain-specific fields - Shared logic lives in plain helpers; never call
@mcp.tool()-decorated objects directly - Depot file names must go through
_depot_path()(traversal-safe) - Blocking work goes through
anyio.to_thread.run_sync - See mcp-central-docs for fleet-wide coding standards
Key Files
src/grandorgue_mcp/server.py— single canonical server (mcpb stages from here)pyproject.toml— build config and entry pointsscripts/mcpb-pack.ps1— mcpb bundle staging + packCLAUDE.md— Claude Code context
Install docs: follow mcp-central-docs/standards/AGENT_INSTALL_REFERENCE.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.
- 8d ago First seen · 27 lines · 360 tokens per session scan A 12af166a49b2
grandorgue-mcp AGENTS.md is an instructions file published in the GitHub repository sandraschi/grandorgue-mcp (2 stars, last pushed 2d ago), licensed MIT. It adds 360 tokens to every session, about $0.0018 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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