SimpMusic is a free and open-source music app for Android and desktop that uses YouTube Music and YouTube as its music backend. It is for people who want to browse, stream, organize, and listen to music with features such as lyrics, equalization, playlists, analytics, caching, and offline playback. The catalogue entries are skills, an instruction, and an agent associated with the app's development.
Borrowing it
Nothing to install: this file belongs to maxrave-dev/SimpMusic. 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/maxrave-dev/SimpMusic/dev/.claude/skills/marketing-ideas/SKILL.mdgit clone --depth 1 https://github.com/maxrave-dev/SimpMusicWrote 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/skills/maxrave-dev/simpmusic/marketing-ideas)<a href="https://agentmods.dev/skills/maxrave-dev/simpmusic/marketing-ideas"><img src="https://agentmods.dev/badge/skills/maxrave-dev/simpmusic/marketing-ideas.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 | $0.00074 | $0.01171 |
| Opus 5 | $0.00037 | $0.00585 |
| Sonnet 5 | $0.00015 | $0.00234 |
| Haiku 4.5 | $0.00007 | $0.00117 |
Grade A, and why
marketing-ideas 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 6d 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.
The source is not reproduced here
Licensed GPL-3.0
The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 6d ago First seen · 167 lines · 74 tokens per session scan A 76b56b5a15a6
marketing-ideas is a skill published in the GitHub repository maxrave-dev/SimpMusic (10,976 stars, last pushed yesterday), licensed GPL-3.0. It adds 74 tokens to every session and 1,171 once invoked, about $0.0004 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.
Other skills, from other repositories
sceneview
Build 3D and AR apps with the SceneView SDK in Jetpack Compose, SwiftUI (iOS/macOS/visionOS via SceneViewSwift), Web (Filament.js), Flutter and React Native. Use whenever the user asks for "3D in Compose", "AR with ARCore in Compose", a model viewer, or any cross-platform 3D/AR app where the dependency is…
to-plan
Use when one ready GitHub issue or an in-chat task needs a repository-aware implementation plan for a later implementation workflow.
compose-focus-navigation
Use when writing or reviewing Jetpack Compose UI for TV, keyboard, desktop, accessibility focus, D-pad navigation, FocusRequester, focusProperties, key events, or initial focus behavior.
paysh-catalog
Catalog of pay.sh services payable via agentpay (x402). OPT-IN ONLY — activate when the user explicitly invokes pay.sh / paysh / x402 / 'pay for' / 'pay with burner', or asks what they can pay for. Stay dormant otherwise; defer to free tools. Activation triggers are the frontmatter triggers: list (authoritative)…
compose-state-and-effects
Use when writing or reviewing Jetpack Compose state ownership, remember state, state hoisting, screen state holders, LaunchedEffect, DisposableEffect, SideEffect, Flow collection, navigation, snackbar, analytics, or focus requests.
grounded-writing
Use when drafting or revising text for the user to publish or send, including short review comments, replies, and evidence-led technical prose.