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MusicKit · dpearson2699 | DecimalAI

codingby dpearson2699

MusicKit

dpearson2699/musickit

Source dpearson2699/swift-ios-skills ↗License NOASSERTION

Integrate Apple Music playback, catalog search, and Now Playing metadata using MusicKit and MediaPlayer.

SkillScore100Maintained

Automatic

Coding pack

Last verified 8/14/2026

What it changes

Passed 23 of 23 test cases with the skill, and 19 of 23 without it.

Without skill83%

With skill100%

Checks it passed that the model alone missed

Insert items using position .tail
Insert item using position .afterCurrentEntry
Enable the MusicKit App Service for the explicit bundle ID

and 1 more in the full report

4 fixed19 passed either way0 still failing0 broke

Pass-rate lift: +17 pp
Tokens: +162%
Agent turns: 0%
Response time: -40%

Model gemini-3.6-flashMeasured 8/14/2026v123 of 23 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dpearson2699-musickit/SKILL.md https://app.decimal.ai/s/dpearson2699-musickit/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dpearson2699-musickit, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dpearson2699-musickit/ and pins it in .decimal/skills.lock

decimalai skills add dpearson2699-musickit

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dpearson2699-musickit/SKILL.md https://app.decimal.ai/s/dpearson2699-musickit/SKILL.md

Raw file: /s/dpearson2699-musickit/SKILL.md ↗ · machine-readable summary at /s/dpearson2699-musickit.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

When setting up an iOS app identifier in the Apple Developer Portal to use MusicKit automatic developer token generation, what App Service feature flag must be enabled?

What was checked, without and with the skill
Checked	Without skill	With skill
Enable the MusicKit App Service for the explicit bundle ID	Missed	Passed

case-17 · gemini-3.6-flash · 8/14/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md350 lines2 files

MusicKit

Search the Apple Music catalog, manage playback with ApplicationMusicPlayer, check subscriptions, and publish Now Playing metadata via MPNowPlayingInfoCenter and MPRemoteCommandCenter.

Setup
Workflow
Authorization
Catalog Search
Subscription Checks
Playback with ApplicationMusicPlayer
Queue Management
Now Playing Info
Remote Command Center
Common Mistakes
Review Checklist
References

Workflow

Verify the MusicKit App Service, bundle identifier, purpose string, and background-audio mode before debugging code.
Request authorization, then model every non-authorized state explicitly.
Search or load catalog content and check MusicSubscription.current before queueing playback.
Choose ApplicationMusicPlayer for app-scoped playback; wire Now Playing and remote commands only when the app owns those surfaces.
Test authorized, denied, unsubscribed, offline, queue failure, interruption, and track-change states. Fix the smallest failing layer, restore the fixture, and rerun the same state matrix.

Setup

Project Configuration

Enable the MusicKit App Service for the app's explicit bundle ID in the Apple Developer portal so MusicKit can generate developer tokens automatically.
Add NSAppleMusicUsageDescription to Info.plist explaining why the app accesses the user's media library.
For background playback, add the audio background mode to UIBackgroundModes.

Imports

Track record

Benchmark

23 / 23

test cases passed, vs 19 / 23 without

Adoption

Users: 7
Times used: 122

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dpearson2699 / swift-ios-skills

skills/musickit/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/3/2026Version v1Bundled 1 file

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

MusicKit

Contents

Workflow

Setup

Project Configuration

Imports

Track record

Benchmark

Adoption

SkillSafety

Source

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