groove-builder

groove-builder is a skill for Claude Code, Codex from glincker/ableton-skills. It costs 60 tokens per session (1,272 once invoked), scanned A, original, MIT.

A helper that creates drum patterns for genres such as house, trap, techno, lo-fi hip-hop, and drum and bass. It writes kick, snare, hi-hat, and percussion notes into a MIDI clip in Ableton Live.

In plain words
What is it for?
Use it to make one-bar or longer drum grooves, including shuffled UK garage and half-time trap or drill patterns. It can work with an existing drum rack or ask for one to be loaded.
Why use it?
It removes the need to manually place every drum hit and provides genre-appropriate timing, tempo, and velocity patterns. It also checks whether the drum track has a suitable kit loaded.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to make one-bar or longer drum grooves, including shuffled UK garage and half-time trap or drill patterns. It can work with an existing drum rack or ask for one to be loaded.

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Install with agentmods
npx agentmods add skills/glincker/ableton-skills/groove-builder
Install

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.

Any agent
npx skills add glincker/ableton-skills --skill groove-builder
Clone the repo
git clone --depth 1 https://github.com/glincker/ableton-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for groove-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/glincker/ableton-skills/groove-builder/github.svg)](https://agentmods.dev/skills/glincker/ableton-skills/groove-builder)
Your own site
<a href="https://agentmods.dev/skills/glincker/ableton-skills/groove-builder"><img src="https://agentmods.dev/badge/skills/glincker/ableton-skills/groove-builder/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.

agentmods 80×15 button for groove-builder

Your own site · 80×15
<a href="https://agentmods.dev/skills/glincker/ableton-skills/groove-builder"><img src="https://agentmods.dev/badge/skills/glincker/ableton-skills/groove-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,272 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00060 $0.01272
Opus 5 $0.00030 $0.00636
Sonnet 5 $0.00012 $0.00254
Haiku 4.5 $0.00006 $0.00127

Measured 10d ago against content hash 1e63db88020a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

groove-builder 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 10d 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.

skills/groove-builder/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Groove Builder

Generate idiomatic drum patterns by genre with proper humanization. Writes to MIDI clips on the user's drum track.

Workflow

1. Identify genre + tempo

Required: genre. Optional: tempo (use genre defaults).

Genre Default tempo Time sig
Lo-fi hip-hop 70-90 4/4
Boom-bap 85-95 4/4
Trap 130-150 (half-time feel) 4/4
House 120-128 4/4
Tech house 124-128 4/4
Techno 125-135 4/4
DnB / Jungle 165-180 4/4
UK garage 130-138 4/4 (shuffled)
Drill (UK) 140-145 (half-time) 4/4
Reggaeton 95-100 4/4 (dembow)

2. Verify drum rack

get_track_info on the drum track. Confirm a drum rack is loaded with at least kick (C1), snare (D1), hat (F#1), and optionally clap (D#1), open hat (A#1), perc (G1+).

If no kit loaded → ask user, or load stock Ableton Drum Kit.

3. Write the pattern

For a 1-bar (16-step) pattern, here are tested templates:

Lo-fi hip-hop
Kick:  X . . . . . X . . . . . . . . .
Snare: . . . . X . . . . . . . X . . .   (snare on 5 & 13 for half-time feel)
Hat:   X . X . X . X . X . X . X . X .   (8th notes)
  • Kick: vel 100-110
  • Snare: vel 90-100, slight late timing (+5ms)
  • Hat: vel 65-85, ±15 humanize, swing 8-12%
Boom-bap
Kick:  X . . X . . X . . . X . . . . .
Snare: . . . . X . . . . . . . X . . .
Hat:   X X X X X X X X X X X X X X X X   (16ths)
  • Hat: vel 50-80, more aggressive humanize ±20
Trap
Kick:  X . . . . . . X . . . . . . . .   (sparse, half-time feel)
Snare: . . . . X . . . . . . . X . . .
Hat:   X X . X X X . X X . X X X . X X   (rolling, with stutters)
808:   long held bass notes underneath
  • Hi-hat rolls: alternate 16ths with 32nd-note bursts
  • Open hat occasionally on the off-beat
House
Kick:  X . . . X . . . X . . . X . . .   (4-on-the-floor)
Clap:  . . . . X . . . . . . . X . . .
Hat:   . . X . . . X . . . X . . . X .   (off-beat 8ths)
OpHat: . X . . . X . . . X . . . X . .   (between beats)
  • Kick: vel 110, locked on grid
  • Clap: vel 95
  • Hat: tight, minimal humanize

Read the full file on GitHub · 113 lines

Changes

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.

  1. 10d ago First seen · 113 lines · 60 tokens per session scan A 1e63db88020a

Subscribe to this mod's changes

groove-builder is a skill published in the GitHub repository glincker/ableton-skills (24 stars, last pushed 17d ago), licensed MIT. It adds 60 tokens to every session and 1,272 once invoked, about $0.0003 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.

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