VoiceCat.Mac and VoiceCat.iOS are .NET 10 AppKit and UIKit clients over the shared managed core. The ReplayKit upload extension under native/apple/broadcast remains Swift because it runs under the extension memory limit and writes the versioned shared audio ring.

Build on macOS with Xcode and the pinned .NET workloads:

./scripts/build-native.ps1
./scripts/build-native-ios.sh
dotnet restore clients/apple/VoiceCat.Apple.slnx
dotnet build clients/apple/VoiceCat.Apple.slnx -c Debug --no-restore

Use publish-macos.sh --dry-run to validate a local ad-hoc macOS bundle. The dry-run build does not enable hardened runtime because ad-hoc signatures have no Team ID and cannot satisfy macOS library validation. The script normalizes nested signatures and installs the verified bundle at both VoiceCat.Mac/bin/Release/net10.0-macos27.0/osx-arm64/VoiceCat.app and VoiceCat.Mac/bin/Release/distribution/VoiceCat.app. Distribution builds remain hardened and require VOICECAT_CODESIGN_IDENTITY; optional notarization uses APPLE_ID, APPLE_TEAM_ID, and APPLE_APP_PASSWORD.

For a physical iOS device, use build-ios-device.sh and deploy-ios-device.sh. The host and ReplayKit extension require signing profiles with App Group group.me.iamtalon.voicecat. Hardware validation must cover VoiceOver, background and lock behavior, interruptions, route changes, Bluetooth, ReplayKit, and iOS 27 ScreenCaptureKit audio.

The shared ring contract is documented in docs/broadcast-ring-format.md.