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.
npx skills add Cohenjikan/McMusicMaker --skill minecraft-redstone-musicgit clone --depth 1 https://github.com/Cohenjikan/McMusicMakerWrote 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/cohenjikan/mcmusicmaker/minecraft-redstone-music)<a href="https://agentmods.dev/skills/cohenjikan/mcmusicmaker/minecraft-redstone-music"><img src="https://agentmods.dev/badge/skills/cohenjikan/mcmusicmaker/minecraft-redstone-music/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/cohenjikan/mcmusicmaker/minecraft-redstone-music"><img src="https://agentmods.dev/badge/skills/cohenjikan/mcmusicmaker/minecraft-redstone-music.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00266 | $0.15028 |
| Opus 5 | $0.00133 | $0.07514 |
| Sonnet 5 | $0.00053 | $0.03006 |
| Haiku 4.5 | $0.00027 | $0.01503 |
Grade C, and why
minecraft-redstone-music scanned grade C with 1 finding 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 11d 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- The YAML block above is OPTIONAL metadata for Claude Code's skill loader (name + trigger phrases). Other agents/platforms can ignore it — there is no loader to satisfy; just read the body below (or README.md) and ru The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
35 files 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.
- assets/demo.mid 794 B
- assets/qzpno_mv.zip 2408 KB
- assets/redpiano_map_multi.json 11 KB
- BINARIES.md 18 KB
- designer/layout_designer.html 70 KB
- designer/midiengine.js 20 KB runs code
- designer/particle_editor.html 35 KB
- docs/CONTRACT.md 41 KB
- docs/FEATURE_MATRIX.md 21 KB
- docs/MOD_ARCHITECTURE.md 39 KB
- docs/PARTICLES.md 5.7 KB
- docs/RUNTIME_SANDBOX.md 5.1 KB
- docs/VERSION_TACTICS.md 30 KB
- QUICKSTART.md 33 KB
- README.md 16 KB
- requirements-audio.txt 2.3 KB
- requirements-demo.txt 780 B
- requirements.txt 668 B
- scripts/audio_to_midi.py 23 KB runs code
- scripts/build_machine.py 33 KB runs code
- scripts/build_particles.py 15 KB runs code
- scripts/build_resourcepack.py 20 KB runs code
- scripts/deploy_bundle.py 32 KB runs code
- scripts/doctor.py 37 KB runs code
- scripts/fetch_binaries.py 25 KB runs code
- scripts/generators/inplace.py 27 KB runs code
- scripts/generators/multilane.py 46 KB runs code
- scripts/generators/swave.py 65 KB runs code
- scripts/make_demo_samples.py 13 KB runs code
- scripts/midi_report.py 26 KB runs code
- scripts/mod_build.py 26 KB runs code
- scripts/params_schema.py 29 KB runs code
- scripts/prepare_all.py 41 KB runs code
- scripts/redpiano_core.py 126 KB runs code
- scripts/runtime_guard.py 2.1 KB runs code
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.
- 11d ago First seen · 650 lines · 266 tokens per session scan C b3a51e5425f1
minecraft-redstone-music is a skill published in the GitHub repository Cohenjikan/McMusicMaker (10 stars, last pushed 1mo ago), with no licence file. It adds 266 tokens to every session and 15,028 once invoked, about $0.0013 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
minecraft-modpack-server
Host modded Minecraft servers (CurseForge, Modrinth).
ashfox
Create, refine, animate, and visually review Minecraft-style block and pixel assets in the ashfox Web Workbench. Use for ashfox modeling and export preparation, not repository development or direct Blockbench editing.
img2blockbench
Reconstruct a Minecraft-style creature, character, prop, or vehicle concept as a native Blockbench model using an optional provider-selected 3D mesh, agent vision, and deterministic compilation. Use when Codex should turn PNG, JPEG, or WebP artwork, optionally accompanied by a textured GLB or GLTF from any image-to-3D…
setup-fabric
Step 1 of 4 of the Minecraft Java MCP setup. Install Minecraft Java Edition with the Fabric loader — either a single-player client or a headless dedicated server — as the foundation the MCP mod runs inside. Use when the user wants to set up Minecraft Java for AI/MCP control from scratch, or asks how to get Fabric…
survey-research
Researches real-world buildings, cities, landmarks, vehicles, and mechanisms so they can be represented faithfully as Minecraft structures. Use when a build request references a real or historical thing and the exec-plan or exec-blueprint skill needs accurate proportions, layouts, materials, or details. Part of the…
setup-mod
Step 2 of 4 of the Minecraft Java MCP setup. Download the minecraft-java MCP mod jar and its matching Fabric API jar and install both into the Minecraft mods folder. Use when the user has Minecraft Java with the Fabric loader ready and needs the MCP mod and Fabric API installed.