Borrowing it
Nothing to install: this file belongs to ersatzben/maxmsp-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/ersatzben/maxmsp-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/ersatzben/maxmsp-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/ersatzben/maxmsp-mcp/claude-md)<a href="https://agentmods.dev/instructions/ersatzben/maxmsp-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/ersatzben/maxmsp-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 | $0.00539 | $0.00539 |
| Opus 5 | $0.00269 | $0.00269 |
| Sonnet 5 | $0.00108 | $0.00108 |
| Haiku 4.5 | $0.00054 | $0.00054 |
Grade A, and why
maxmsp-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 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
MaxMSP MCP Server
This project provides MCP tools for programmatic Max/MSP patch manipulation.
Critical Rules
Run /maxmsp skill before creating or modifying patches - it contains all placement rules, object gotchas, and tool usage guidelines that MUST be followed.
Quick Reminders (details in skill)
- CONSIDER SUBPATCHERS for new functionality!
- NO OVERLAP: Always call
get_avoid_rect_position()before placing objects - Message boxes: Use numbers
[200, 0, 50]not strings["200", "0", "50"] - Auto-sizing: Objects & comments auto-size; messages fixed 70px; UI objects keep defaults
Required Flags
- Math/pack/unpack: JSON strips
.0from numbers. Use STRING args to preserve floats:["0", "127", "0", "25."]. Use["f", "f", "f"]for unpack. Setint_mode=Trueto explicitly allow integers. Exception:scalewith output range ≤ 2 auto-detects float intent. - dial: Use
dialwith@sizeattribute instead oflive.dial(setuse_live_dial=Trueto bypass) - trigger/t: Set
trigger_rtl=True- fires right-to-left ([t b f]sendsffirst) - random: Set
random_bang=True- numbers set range, bangs trigger output (use[t b]to convert) - coll: Always include
@embed 1to persist data on save
MCP Tools
Key tools for object manipulation:
get_avoid_rect_position()- Get bounding box before placingadd_max_object()- Create object (auto-fits width)recreate_with_args()- Change creation-time args, preserving connectionsmove_object()- Reposition objectautofit_existing()- Apply auto-fit to existing object
Architecture
server.py- Python FastMCP server with Socket.IOMaxMSP_Agent/max_mcp.js- Main Max-side JavaScript handlerMaxMSP_Agent/max_mcp_v8_add_on.js- V8 JavaScript withobj.boxtextaccess
After code changes: Reload js objects in Max (double-click to open editor, then close) and restart node.script (script stop, script start).
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 · 40 lines · 539 tokens per session scan A 651b36a82b64
maxmsp-mcp CLAUDE.md is an instructions file published in the GitHub repository ersatzben/maxmsp-mcp (151 stars, last pushed 1mo ago), licensed MIT. It adds 539 tokens to every session, about $0.0027 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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