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Write a new Strudel track or extend an existing one from a brief. Use when the user wants to compose, draft, sketch, or add a track to the album in this repo, or asks for a Strudel pattern in a given vibe/genre/reference.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Generate 2-3 variations of an existing Strudel pattern for A/B comparison. Use when the user wants to explore alternatives, hear different takes, says "give me options", "try a different version", "variations on this", or wants to evolve a track without committing yet.
Generate a brand-new song by reading the whole skill rack and composing in one artist's style — chasing TIMELESS, catchy, instant-classic tunes, not pastiche. Use when the user says "turn the crank", "/turn-the-crank", "crank one out", "make a song in someone's style", or wants a fresh generated track for the album. Claude picks the artist. Bonobo-style layering crescendo; drums only if the song wants them, with a kit that FITS (Travis-Barker busy style is one option, not a default). Sparse→bloom arc (track 01 "dawn" is one example, not a required template — size the arc to the song).
The craft of memorable melody — motif construction & development, contour, melodic rhythm, call-and-response, earworm hook science, tension notes & resolution, register/range, and the common failure modes (wandering lines, no anchor, unresolved tension that just sits there). Use when writing a melody, making it catchier, building a hook, the melody feels aimless or forgettable, or you need a motif to develop across a track.
Complete reference for every sound our Strudel tracks can use — the loaded sample banks (VCSL orchestral mallets/winds, ~50 drum kits, mridangam, the full TidalCycles Dirt set, eddyflux/crate world percussion, amen breaks), the 128 General MIDI soundfont instruments (gm_violin, gm_cello, gm_string_ensemble, gm_flute, gm_choir_aahs, gm_pad_*, gm_lead_*…), the built-in synths + FM, and how to load more (github: packs, shabda→Freesound, the open-strudel-samples explorer). Use when picking a voice, reaching for instrument variety, or when a sound isn't playing.
Load a Strudel pattern into strudel.cc via agent-browser, play it, and verify it parses and runs without error. Use after composing or editing any track in this repo, or when the user says "test the track", "does this work", "play it", or wants to verify a Strudel pattern.
The craft of building sonic worlds — drones, noise beds, field recordings, granular texture, reverb and delay as architectural depth (the z-axis), the atmospheric glue layer that separates a dry sketch from an immersive environment, and the vinyl crackle/tape hiss "air" that makes digital feel lived-in. Use when a track sounds dry, sterile, or flat; when you want to add a drone or pad bed; when a field recording should glue a section; when the mix has no depth or front-to-back space; when a breakdown feels empty; when you want to make it feel like a place not just a pattern; or when someone says "it sounds cold/lifeless/2D". Siblings [[strudel-sound-design]] [[strudel-effects]] [[strudel-mixing]] [[strudel-sample-library]]; also connects [[strudel-sampling]] [[strudel-automation]] [[strudel-bass]] [[strudel-emotion]] [[strudel-pro-tips]].
| name | strudel-compose |
| description | Write a new Strudel track or extend an existing one from a brief. Use when the user wants to compose, draft, sketch, or add a track to the album in this repo, or asks for a Strudel pattern in a given vibe/genre/reference. |
The user wants a Strudel pattern written or extended. Strudel is a JS-based live-coding music language (strudel.cc, docs at strudel.cc/learn).
Get clear on:
tracks/ (give it a name) or extending an existing one?If the brief is one word ("ambient"), ask one targeted follow-up. Don't ask three.
setcps) and the simplest pulse first. Layer on top.stack() to layer voices. Each voice does one job (bass, pad, melody, percussion, texture).sine.range(a, b).slow(N) instead of static numbers — that's where movement comes from. Apply to lpf, gain, pan, etc.<a b c> for one-per-cycle, [a b] for subdivisions, *N for repeats, (3,8) for Euclidean rhythms, ? for random drop..room(0.9).delay(0.5).delaytime(0.5) turns a thin pattern into a wash. Use sparingly on drums.// XX — Title
// One-line vibe description.
// Reference vibe: 1-2 artists/albums.
setcps(N)
stack(
// voice 1: foundation (bass / drone)
...,
// voice 2: rhythm
...,
// voice 3: melody / texture
...,
)
Always test before declaring done. Invoke the strudel-test skill (or do it manually): open strudel.cc in agent-browser, paste, play, screenshot, listen for errors.
A pattern that doesn't parse is worse than no pattern.
For a sectioned track, also run the structural gates — they're static (no render) and catch flat dynamics or a missing build/strip arc before anyone listens:
make eval ARGS="v2-gen/<track-id>" # contrast / arc / baseline assertions
make eval ARGS="--update" # record the new track's baseline once it passes
A track that fails contrast or arc isn't done — fix the section gains/voices
(quiet intro and outro, a real climax, a strip-back section), don't lower the bar.
An intentionally-flat ambient piece can declare that in its manifest:
"eval": { "allow_flat": true }.
s("bd") SILENTLY DROPS without a bank. The drum pack we load (tidal-drum-machines.json) prefixes every sample with its drum-machine name — AkaiLinn_bd, RolandTR909_bd, etc. Bare "bd" / "sd" / "hh" resolve to nothing and you hear nothing. Always chain .bank("AkaiLinn") (or another bank with the kit you want) on percussion. Synth oscillators (sine, sawtooth, triangle, square, white) need no bank.setcps(120) is wrong — cps is cycles per second, not BPM. setcps(0.5) ≈ 30 bpm in 4/4, setcps(2) ≈ 120 bpm..note() and note() both exist — the standalone note("...") is the usual entry point..s() after .note() and expect both to apply — note(...).s("piano") works because Strudel maps notes to the sample's playback rate.