Borrowing it
Nothing to install: this file belongs to devjourney/music-assistant-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/devjourney/music-assistant-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/devjourney/music-assistant-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/devjourney/music-assistant-mcp/claude-md)<a href="https://agentmods.dev/instructions/devjourney/music-assistant-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/devjourney/music-assistant-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 | $0.00242 | $0.00242 |
| Opus 5 | $0.00121 | $0.00121 |
| Sonnet 5 | $0.00048 | $0.00048 |
| Haiku 4.5 | $0.00024 | $0.00024 |
Grade A, and why
music-assistant-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
MusicAssistantMCP
MCP server wrapping music-assistant-client via FastMCP.
Project Structure
src/music_assistant_mcp/server.py- FastMCP instance, lifespan, entry pointsrc/music_assistant_mcp/connection.py- Env var parsing, auth configsrc/music_assistant_mcp/serializers.py- MA model → dict converterssrc/music_assistant_mcp/tools/- Tool modules (search, library, playback, queue, playlists)src/music_assistant_mcp/resources.py- MCP resources
Key Patterns
- Each tool module has a
register(mcp)function that decorates tools onto the FastMCP instance - Tools get the MA client from
ctx.request_context.lifespan_context["client"] - All tools return JSON strings
- The lifespan context manager handles connection/auth lifecycle
- Serializers use
getattrwith fallbacks to handle both full model objects andItemMappinglightweight refs
Running
MA_SERVER_URL=http://host:8095 MA_TOKEN=xxx music-assistant-mcp
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 · 26 lines · 242 tokens per session scan A 5dfff94a2766
music-assistant-mcp CLAUDE.md is an instructions file published in the GitHub repository devjourney/music-assistant-mcp (2 stars, last pushed 5mo ago), licensed MIT. It adds 242 tokens to every session, about $0.0012 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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