axiom-media

Media

You MUST use this skill for ANY camera, photo, audio, haptic, or media playback work.

Not on Claude Code? Where this router says "Launch some-auditor agent", read that auditor's file in this suite and follow it inline — the same procedure, needing only file search and read.

Available here: skills/camera-auditor.md.

Agents that need Bash — builds, tests, simulators, crash symbolication — stay Claude Code-only; there is no inline equivalent for those.

Quick Reference

Symptom / Task	Reference
Camera capture, AVCaptureSession	See skills/camera-capture.md
Slow camera launch / deferred start (iOS 26+), ProRes recording via Pro Video Storage (OS27)	See skills/camera-capture.md Patterns 8-9
Camera API (RotationCoordinator, etc.)	See skills/camera-capture-ref.md
Center Stage front camera (iPhone 17), dynamic aspect ratio, smart framing, 24/48 MP capture	See skills/camera-capture-ref.md
Camera freezes, black preview, rotation	See skills/camera-capture-diag.md
Photo pickers, library access	See skills/photo-library.md
PHPicker, PhotosPicker API reference	See skills/photo-library-ref.md
PhotoKit + Swift 6 strict concurrency, nonisolated observer, performChanges isolation, _dispatch_assert_queue_fail	See axiom-concurrency (skills/isolation-inheritance-diag.md)
Audio, AVFoundation, spatial audio	See skills/avfoundation-ref.md
Video write/export/playback, sample-buffer engine, resumable export, Apple Log 2, iOS 27 deprecations (OS27)	See skills/avfoundation-video-ref.md
Audio recognition, ShazamKit	See skills/shazamkit.md
ShazamKit API reference	See skills/shazamkit-ref.md
On-device music analysis (key, tempo, structure, loudness), MusicUnderstanding (OS27)	See skills/music-understanding.md
On-device face grouping (cluster faces into people across a library), video highlights/key frames, MediaIntelligence (OS27)	See skills/media-intelligence.md
Haptic feedback, Core Haptics	See skills/haptics.md
Now Playing metadata, remote commands	See skills/now-playing.md
Animated lock-screen artwork (iOS 26+)	See skills/now-playing.md Pattern 8
NowPlaying framework (import NowPlaying, Swift-native MediaSession, OS27)	See skills/now-playing.md (NowPlaying Framework section)
Cast / route media to non-AirPlay devices (Google Cast/Chromecast, DLNA) as system routes, AVSystemRouting (iOS27, EU-gated/beta)	See skills/system-media-routing.md
Screen capture / recording / streaming the screen or your own app, ScreenCaptureKit (OS27 — new on iOS/iPadOS/tvOS/visionOS 27; macOS 12.3+)	See skills/screen-capture.md
CarPlay HIG, app categories, design rules, entitlements	See skills/carplay-hig.md
CarPlay templates reference (all 12 templates, availability matrix, depth limits)	See skills/carplay-templates-ref.md
CarPlay navigation reference (base view, route guidance, cluster/HUD, multitouch, voice prompts, map panels + EV charging iOS 27)	See skills/carplay-navigation-ref.md
CarPlay Now Playing template customization + sports mode	See skills/now-playing-carplay.md
MusicKit Now Playing	See skills/now-playing-musickit.md
DockKit motorized stands / gimbals, subject tracking, custom motor control	See skills/dockkit.md
Speech-to-text / transcription (SpeechAnalyzer, mic → transcript)	Invoke axiom-ai (skills/ios-ml.md)

Decision Tree

digraph media {
    start [label="Media task" shape=ellipse];
    what [label="Which media feature?" shape=diamond];

    start -> what;
    what -> "skills/camera-capture.md" [label="camera capture"];
    what -> "skills/photo-library.md" [label="photo pickers\n/ library"];
    what -> "skills/avfoundation-ref.md" [label="audio / AVFoundation"];
    what -> "skills/avfoundation-video-ref.md" [label="video write/export\n/ sample-buffer (OS27)"];
    what -> "skills/shazamkit.md" [label="ShazamKit\n/ audio recognition"];
    what -> "skills/music-understanding.md" [label="music analysis\n(key/tempo/structure)"];
    what -> "skills/media-intelligence.md" [label="face grouping /\nvideo highlights (OS27)"];
    what -> "skills/haptics.md" [label="haptic feedback"];
    what -> "skills/now-playing.md" [label="Now Playing\n/ remote commands"];
    what -> "skills/system-media-routing.md" [label="cast to non-AirPlay\n(Chromecast/DLNA, iOS27)"];
    what -> "skills/screen-capture.md" [label="screen capture /\nrecording (OS27)"];
    what -> "skills/carplay-hig.md" [label="CarPlay app design\n/ categories / entitlements"];
    what -> "skills/dockkit.md" [label="DockKit stands\n/ gimbals / tracking"];
}

1. Camera capture? → skills/camera-capture.md (patterns), skills/camera-capture-ref.md (API), skills/camera-capture-diag.md (debugging)
2. Photo pickers / library? → skills/photo-library.md, skills/photo-library-ref.md
3. Audio / AVFoundation (audio)? → skills/avfoundation-ref.md; video write/export/playback, sample-buffer engine, resumable export, iOS 27 deprecations? → skills/avfoundation-video-ref.md (OS27)
4. ShazamKit / audio recognition? → skills/shazamkit.md, skills/shazamkit-ref.md
5. On-device music analysis (key, tempo, structure, pace, instruments, loudness)? → skills/music-understanding.md (OS27)
6. On-device face grouping (cluster faces into people across a library) or video highlights / key-frame detection? → skills/media-intelligence.md (OS27)
7. Haptics? → skills/haptics.md
8. Now Playing / remote commands? → skills/now-playing.md, skills/now-playing-carplay.md, skills/now-playing-musickit.md
9. Cast / route media to non-AirPlay devices (Google Cast/Chromecast, DLNA) as system routes? → skills/system-media-routing.md (iOS27, EU-gated/beta)
10. Screen capture / recording / streaming the screen or your own app (ScreenCaptureKit)? → skills/screen-capture.md (OS27 — new on iOS/iPadOS/tvOS/visionOS 27)
11. CarPlay app design, category selection, entitlement request? → skills/carplay-hig.md (start here for any CarPlay work)
12. DockKit motorized stands / gimbals, subject tracking, custom motor control? → skills/dockkit.md
13. Want camera code audit? → Launch camera-auditor agent (detects deprecated APIs and architectural gaps: missing interruption handlers, runtime-error recovery, audio session deactivation, permission-denied UX, RotationCoordinator on iOS 17+; scores RELIABLE / FRAGILE / BROKEN)

Cross-Domain Routing

Camera + permissions (camera access denied, Info.plist missing):

• Camera code → stay here (camera-capture)
• Privacy manifest / Info.plist → invoke axiom-integration (privacy-ux reference)
• Build/entitlement errors → invoke axiom-build

ShazamKit + microphone permissions:

• Microphone NSMicrophoneUsageDescription → invoke axiom-integration (privacy-ux reference)
• ShazamKit API and matching → stay here (shazamkit)

Now Playing + background audio:

• Now Playing metadata/controls → stay here (now-playing)
• Background audio mode / BGTaskScheduler → invoke axiom-integration (background-processing reference)

Speech-to-text + audio capture (transcribing mic or asset audio):

• SpeechAnalyzer / SpeechTranscriber, the ~2-simultaneous-analyzer cap, the OS27 input providers → invoke axiom-ai (skills/ios-ml.md)
• Audio session category/mode, AVCaptureSession wiring → stay here (avfoundation-ref, camera-capture)
• The trap: CaptureInputSequenceProvider.providerWithSession(...) (OS27) automatically reconfigures your app's default AVAudioSession. If this suite's audio-session setup "randomly breaks" after transcription is added, that's the cause — use provider(from:in:) and add its captureAudioDataOutput to your own session.

Photo library + privacy:

• Photo picker (PHPicker, PhotosPicker) → stay here (photo-library) — no permissions needed
• Full PHPhotoLibrary access → stay here (photo-library-ref) — limited access model
• Privacy manifest for photo usage → invoke axiom-integration (privacy-ux reference)

DockKit + camera / custom inference:

• DockKit stand control, framing, motor, tracking states → stay here (dockkit)
• Underlying AVCaptureSession setup → stay here (camera-capture)
• Custom Vision / Core ML inference feeding observations → invoke axiom-vision
• Camera permission (NSCameraUsageDescription) → invoke axiom-integration (privacy-ux reference)

MediaIntelligence + Vision (faces, image analysis):

• Group faces into people across a library, video highlights / key frames → stay here (media-intelligence) — clustering identities + on-device video moment detection
• Detect where a face is in one image (bounding box, landmarks), OCR, segmentation → invoke axiom-vision — per-image detection, a different problem
• System Photos "People" album → that album is system-owned (PhotoKit); MediaIntelligence builds your own index over assets you manage → stay here (photo-library for the asset access)

Anti-Rationalization

Thought	Reality
"Camera capture is just AVCaptureSession setup"	Camera has interruption handlers, rotation, and threading requirements.
"Camera launch is fast enough if I startRunning() early"	Output initialization dominates launch; iOS 26 deferred start halves time-to-preview.
"I'll add haptics with a simple API call"	Haptic design has patterns for each interaction type matching HIG.
"ShazamKit is just SHSession + a delegate"	iOS 17+ has SHManagedSession which eliminates all AVAudioEngine boilerplate.
"Now Playing info is just setting metadata"	Remote commands, artwork handling, and state sync have 15+ gotchas.
"I'll use UIImagePickerController for photos"	PHPicker/PhotosPicker are the modern API — no permissions required.
"DockKit is just pairing a stand"	Custom control needs system tracking disabled, handles inverted dock states, and two different coordinate origins.
"Grouping faces is just Vision face detection"	Vision detects faces in one image; MediaIntelligence clusters them into persistent people (entities) across a whole library, with its own working directory and state.
"Casting to Chromecast means bundling the Google Cast SDK"	On iOS 27, AVSystemRouting exposes non-AirPlay routes as system routes — you adopt one Apple API (observe events, start a session, drive playbackControl) instead of a per-vendor SDK. Likely EU-gated/beta — gate and keep a fallback.
"ScreenCaptureKit on iPad works like the Mac (enumerate displays/windows)"	On iOS/iPadOS SCShareableContent and all SCContentFilter initializers are macOS-only — you get a filter ONLY from the system SCContentSharingPicker. New on iOS/iPadOS/tvOS/visionOS 27. Also not ImageRenderer (that snapshots your own SwiftUI view).

Example Invocations

User: "How do I set up a camera preview?" → Read: skills/camera-capture.md

User: "My camera app takes a second before preview appears" → Read: skills/camera-capture.md (Pattern 8, deferred start)

User: "Support the Center Stage front camera" / "Capture 48MP photos" → Read: skills/camera-capture-ref.md

User: "Camera freezes when I get a phone call" → Read: skills/camera-capture-diag.md

User: "How do I let users pick photos in SwiftUI?" → Read: skills/photo-library.md

User: "Implement haptic feedback for button taps" → Read: skills/haptics.md

User: "Now Playing info doesn't appear on Lock Screen" → Read: skills/now-playing.md

User: "How do I identify songs with ShazamKit?" → Read: skills/shazamkit.md

User: "How do I detect a song's tempo / key / beat grid on-device?" / "Analyze audio loudness or structure" → Read: skills/music-understanding.md

User: "Group faces into people across my photo library" / "cluster faces on-device" / "find highlights or a thumbnail frame in a video" → Read: skills/media-intelligence.md

User: "Cast to Chromecast / Google Cast without the Cast SDK" / "support non-AirPlay casting" / "route media to a DLNA device as a system route" → Read: skills/system-media-routing.md

User: "Record / stream the iPad screen" / "ScreenCaptureKit on iOS" / "screen recording in my app" / "capture just my app's content" → Read: skills/screen-capture.md

User: "Track a subject with a motorized stand" / "Control a DockKit gimbal" → Read: skills/dockkit.md

User: "Check my camera code for issues" → Launch: camera-auditor agent