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.
/plugin marketplace add kennethreitz/pytheorynpx agentmods add plugins/kennethreitz/pytheory/composing-with-pytheorygit clone --depth 1 https://github.com/kennethreitz/pytheoryGrade A, and why
composing-with-pytheory 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 3d 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:
- composing-with-pytheory — 100% identical, 0 lines differ
What it actually says
{
"name": "composing-with-pytheory",
"displayName": "Composing with PyTheory",
"description": "Compose music with PyTheory — progressions, melodies, drums, and full arrangements rendered to audio or MIDI from pure Python.",
"author": {
"name": "Kenneth Reitz",
"email": "[email protected]"
},
"homepage": "https://pytheory.org",
"repository": "https://github.com/kennethreitz/pytheory-skill",
"license": "MIT",
"keywords": ["music", "music-theory", "composition", "midi", "audio", "synthesis", "pytheory"]
}
What it installs
The manifest is a name and a version. 6 skills travel with it, and installing the plugin installs all of them — 787 tokens a session between them. Each is measured on its own page, and each can be installed alone.
- Skill composing-with-pytheory A 138 tokens
- Skill chord-lab-with-pytheory A 114 tokens
- Skill keys-and-harmony-with-pytheory A 132 tokens
- Skill playing-guitar-with-pytheory A 165 tokens
- Skill scales-modes-and-tunings-with-pytheory A 153 tokens
- Skill transcription-and-notation-with-pytheory A 85 tokens
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.
- 3d ago First seen · 14 lines scan A 2507b58ea8c8
composing-with-pytheory is a plugin published in the GitHub repository kennethreitz/pytheory (1,639 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.
Other plugins, from other repositories
agent-plugin
Turn any MCP-capable coding agent into a DJ for spotatui, the terminal Spotify client.
wardleyToGo
Generate Wardley Maps in the WTG2 DSL and render them to SVG.
appscope
Honest, self-hosted app market intelligence as a Claude Code skill. Collects store rankings, metadata, install buckets, and reviews locally; produces confidence-banded download/revenue estimates (never fabricated, never above MEDIUM); renders an app-intel report. Opt-in federation of public calibration anchors.
ainsof marketplace
Official AINSOF tools for licensed, human-made production music and video soundtracking.
dj-claude
Adds live music and multi-agent jam band capabilities to Claude Code. Slash commands and MCP tools for setting vibes, building layered jam sessions, and orchestrating full bands. Agents connect over HTTP to collaborate on music in real-time. No API key or browser required.
humanizer
Rewrite AI-sounding text so it reads naturally without changing what it says.