hellyee: Skill for Claude Code

.claude/skills/sound-check/SKILL.md

sound-check is a skill for Claude Code from guvense/hellyee. It costs 144 tokens per session (1,409 once invoked), scanned A, original, MIT.

A pre-flight check for Ableton Live projects that verifies whether each track and loaded instrument actually produces sound. Ableton Live is music-production software, and a silent track can look correct without showing an error.

In plain words
What is it for?
Use it after loading instruments and writing the first clips, especially for drum racks, or whenever a track sounds missing, thin, or inaudible.
Why use it?
It catches missing drum sounds, empty instrument pads, and silent tracks before a full arrangement is built around them.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is guvense/hellyee's own configuration. It tells Claude Code how to work on hellyee itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything hellyee configures →

Reuse

Borrowing it

Nothing to install: this file belongs to guvense/hellyee. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/guvense/hellyee/main/.claude/skills/sound-check/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/guvense/hellyee

Made for: Claude Code.

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README.md
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Per session 144 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,409 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.
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 $0.00144 $0.01409
Opus 5.5 $0.00058 $0.00564
Sonnet 5.5 $0.00029 $0.00282
Haiku 4.5 $0.00014 $0.00141

Measured 2mo ago against content hash 487a5f029f7f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sound-check 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 2mo 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.

.claude/skills/sound-check/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sound check

Everything in Live fails loudly except silence. A wrong note errors, a bad index errors, a missing file errors — but a track that makes no sound reports nothing at all. It writes clean, it places clean, it renders clean, and the only trace is a band that reads 0.0% in an analysis you might not run until the arrangement is finished.

So check before you build. Thirty seconds here saves rebuilding an arrangement.

When

  • After loading instruments and writing the first session clips — before place_in_arrangement.
  • After loading any drum rack, always.
  • Whenever the user says something is missing, thin, or inaudible.
  • Whenever a record_master band reads near zero where you expected content.

The check

1. Drum racks: read the pads, don't trust the map.

get_drum_map returns Live's standard mapping. get_drum_pads(track, device) returns what the loaded rack actually fills. They are not the same — factory kits routinely cover only 36–51, so the shaker at 70 is silence. Write only notes the rack lists; if you want 16th shakers and there is no shaker pad, use the closed hat at low velocity instead.

2. One measured pass over every track.

Fire nothing. Place a few bars, then:

measure_tracks(track_indices=[0,1,2,…], start_bar=<a bar where all of them play>, seconds=15)

One playback pass, ranked by peak, silent flagged under 0.02. Pass start_bar — without it you measure wherever the playhead sits, and a playhead parked outside the section reads 0.000 on every track, which looks exactly like a broken set.

3. Read the ranking as a mix, not just a checklist.

For four-on-the-floor: kick on top, bass under it, lead below that, then percussion, then pads. If the ranking is upside down you have found a mix problem before writing 176 bars over it.

A track reads silent — the decision tree

Never raise the fader first. Work down this list:

check how fix
Is there an instrument? list_track_devices MIDI track with only effects makes no sound
Is it a drum note that exists? get_drum_pads rewrite the pattern onto filled pads
Was a session clip ever fired? — back_to_arranger
Is the track muted, or another soloed? get_song_status unmute
Does the section actually contain the clip? get_arrangement_clips you measured the wrong bar
Is the filter shut? list_device_parameters see the cutoff floors in the hellyee skill
Genuinely quiet, not silent? solo + record_master 4 bars now a level problem — see below

Read the full file on GitHub · 115 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. 2mo ago First seen · 115 lines · 144 tokens per session scan A 487a5f029f7f

Subscribe to this mod's changes

sound-check is a skill published in the GitHub repository guvense/hellyee (9 stars, last pushed 2mo ago), licensed MIT. It adds 144 tokens to every session and 1,409 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-08-31.

Related

sound-check compared with skills from other repositories

sound-check next to 6 skills from other repositories
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sound-checkguvense/hellyeeSkill92mo agoMITA144Claude Code
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