avaudio-engine-workflowlisted

# AVAudio Engine Workflow ## Purpose Guide `AVAudioEngine` graph design and repair. This skill owns audio-node ownership, graph construction, connection formats, typed AVFAudio buffer and format surfaces, taps, manual rendering, offline processing, Audio Unit hosting through `AVAudioUnit`, and real-time safety boundaries. It is not the app audio-session workflow, not the AVFoundation capture or asset workflow, and not a low-level Core Audio C API repair workflow except where AVAudioEngine wraps the lower-level behavior. ## When To Use - Use this skill when code creates, connects, mutates, starts, stops, or repairs an `AVAudioEngine` graph. - Use this skill for `AVAudioPlayerNode`, `AVAudioInputNode`, `AVAudioOutputNode`, `AVAudioMixerNode`, `AVAudioSourceNode`, `AVAudioSinkNode`, taps, `AVAudioFormat`, manual rendering, offline processing, `AVAudioUnit`, Audio Unit instantiation, and render-block safety. - Use this skill when existing code crashes from unattached nodes, format mismatches, missing input or output hardware, illegal graph mutation, callback allocation, actor isolation mistakes, or UI work inside real-time audio paths. - Recommend `avfaudio-session-workflow` when the primary problem is category, route, permission, interruption, or activation policy. - Recommend `coreaudio-modernization-repair-workflow` when the primary problem is legacy `AudioQueue`, `AudioUnit`, `AudioConverter`, pointer, callback, or `OSStatus` code outside AVAudioEngine. ## Single-Path W