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Claude-skill-registry beatlab-contract

BeatLab JSON contract for 16-step (0-15) pianoSequence & drumSequence. Use when generating or editing beats.

install
source · Clone the upstream repo
git clone https://github.com/majiayu000/claude-skill-registry
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/beatlab-contract" ~/.claude/skills/majiayu000-claude-skill-registry-beatlab-contract && rm -rf "$T"
manifest: skills/data/beatlab-contract/SKILL.md
tags
#music#json#beat-generation#audio#sequence
source content

BeatLab Contract (v1)

You must follow this exact contract (Mastra AI Beats Lab compatible):

  • Steps: 16 (0-15)
  • Output JSON must include:
    • "pianoSequence": object mapping each allowed note -> array of step numbers (0-15)
    • "drumSequence": object mapping each allowed drum sound -> array of step numbers (0-15)

Allowed piano notes (fixed): C5, B4, A4, G4, F4, E4, D4, C4, B3, A3, G3

Allowed drum sounds (fixed): Kick, Snare, HiHat, Clap, OpenHat, Tom, Crash, Ride, Shaker, Cowbell

Musical defaults (helpful heuristics):

  • Kick often on 0 and/or 8
  • Snare often on 4 and/or 12
  • HiHat can be steady (e.g., every 2 steps) but avoid over-density
  • Keep melody minimal (few notes, repeating motif)

Output should be ONLY JSON when asked for Beat JSON.