coreaudio-modernization-repair-workflowlisted

# Core Audio Modernization Repair Workflow ## Purpose Guide low-level Core Audio and Audio Toolbox repair. This skill owns the legacy and escape-hatch boundary: when to keep C APIs, when to isolate them, when to migrate toward AVFAudio, and how to make old callback, pointer, buffer, format, and `OSStatus` code understandable and safer without erasing the Apple type boundary. It is not the default audio recommendation when AVFAudio covers the job. ## When To Use - Use this skill when code uses `AudioUnit`, `AudioQueue`, `AudioConverter`, `AudioComponentDescription`, `AudioStreamBasicDescription`, `AudioBufferList`, render callbacks, `OSStatus`, unsafe pointers, or archive-era Core Audio patterns. - Use this skill when existing code has opaque `OSStatus` failures, pointer lifetime bugs, callback crashes, hand-rolled format structs, unsafe Swift bridging, or low-level audio code that might be replaceable with AVAudioEngine or AVAudioSession. - Recommend `avaudio-engine-workflow` when the same job can be modeled as an AVAudioEngine graph or `AVAudioUnit` host. - Recommend `avfaudio-session-workflow` when the real issue is audio-session policy, route, permission, or interruption behavior. ## Single-Path Workflow 1. Classify the low-level audio request: - Audio Unit hosting or rendering - Audio Queue playback or recording - Audio Converter or format conversion - stream description or buffer layout - `OSStatus` diagnosis - callback, pointer, or lifetime repa