Audio cleanup: XML docs + ATC to dogfooding

name: Audio cleanup plan overview: Bring novolis-audio in line with governance XML-doc policy (strict CS1591 on all packable public APIs), relocate Novolis.Audio.Voice.Atc to dogfooding, and ensure generic GPR libraries (Avalonia.Voice, Voice.Design) never require Platform.Windows so Linux CI can build. todos:

• id: decouple-platform-windows

content: Remove Platform.Windows from Novolis.Avalonia.Voice; add optional preview factory hook; wire Windows TTS in NovolisVoiceStudio only status: completed

• id: xml-docs-strict

content: Document all public/protected APIs in packable novolis-audio projects; fix CS1591; add build/.novolis-documentation-complete + doc-audit status: completed

• id: dogfooding-voice-lib

content: Create Novolis.Dogfooding.Voice (non-packable) with moved ATC types + code-export extensions status: completed

• id: decouple-design

content: Remove ATC refs from Voice.Design (EffectChainBuilder, Draft, CodeEmitter enum); trim to generic templates status: completed

• id: remove-atc-package

content: Delete Novolis.Audio.Voice.Atc from novolis-audio slnx/docs; bump version; GPR publish status: completed

• id: migrate-consumers

content: Update dogfooding apps + tests + Directory.Packages.props; optional NovolisVoiceStudio export templates status: completed isProject: false

Goals

1. Documentation — All packable projects under `novolis-audio/src` satisfy documentation policy: GenerateDocumentationFile, no CS1591 gaps on public/protected members, README Install + Quick start.
2. ATC scope — Remove `Novolis.Audio.Voice.Atc` from GPR; host ATC/radio delivery in dogfooding as `Novolis.Dogfooding.Voice` (non-packable, ProjectReference only).
3. Keep GPR Design generic — `Novolis.Audio.Voice.Design` stays on GPR for `Novolis.Avalonia.Voice`; ATC-specific code export moves to dogfooding extensions (your choice).
4. Platform.Windows is opt-in — Generic GPR/UI packages target net10.0 only; `Novolis.Audio.Voice.Platform.Windows` is referenced only by Windows hosts (e.g. NovolisVoiceStudio), fixing avalonia merge CI.

flowchart TB
  subgraph gpr [GPR novolis-audio]
    Voice[Novolis.Audio.Voice]
    Profiles[Novolis.Audio.Voice.Profiles]
    Design[Novolis.Audio.Voice.Design]
    Effects[Novolis.Audio.Effects]
  end
  subgraph dogfood [novolis-dogfooding]
    DogVoice[Novolis.Dogfooding.Voice]
    Studio[NovolisVoiceStudio]
    Bridge[BridgeCommander]
  end
  Design --> Voice
  Design --> Effects
  DogVoice --> Voice
  DogVoice --> Profiles
  DogVoice --> Effects
  DogVoice --> Phraseology[Novolis.Audio.Voice.Phraseology]
  Studio --> Design
  Studio --> DogVoice
  Bridge --> DogVoice

Part A — XML documentation (strict public API)

Current state

• `Directory.Build.props` sets TreatWarningsAsErrors and imports `build/Novolis.Audio.Documentation.props` → GenerateDocumentationFile=true.
• Gap: Recent packages (especially `Voice.Design`) build with many CS1591 warnings on public members (e.g. VoicePresetDraft properties, VoiceDeliveryEffectStep fields) — not yet documentation-complete.
• No `build/.novolis-documentation-complete` marker in novolis-audio (CI doc-audit is optional until marker exists).

Approach

CI alignment

• Ensure PR workflow (via novolis-workflows) runs doc-audit when marker is present, or add explicit doc-audit step to `pull-request.yml` after marker lands.

Part B — Move ATC to dogfooding

What moves (4 types today)

From `Novolis.Audio.Voice.Atc`:

New project: novolis-dogfooding/apps/shared/Novolis.Dogfooding.Voice/

• IsPackable=false
• Namespace: Novolis.Dogfooding.Voice (types renamed optional: keep AtcVoiceOptions / AtcVoiceProfile names to minimize churn)
• PackageReferences (GPR): Novolis.Audio.Voice, Novolis.Audio.Voice.Profiles, Novolis.Audio.Voice.Phraseology, Novolis.Audio.Voice.SherpaOnnx, Novolis.Audio.Effects, Novolis.Audio.Filters — not Novolis.Audio.Voice.Atc
• Add to `Novolis.Dogfooding.slnx`

Dogfood consumers (switch PackageReference → ProjectReference):

• `BridgeCommander`, `XFighter`, `VoiceSmoke`, `NovolisVoiceStudio`
• Update `novolis-dogfooding/Directory.Packages.props`: remove Novolis.Audio.Voice.Atc
• C# usings: Novolis.Audio.Voice.Atc → Novolis.Dogfooding.Voice

Decouple GPR `Voice.Design` from ATC

`Voice.Design` must not reference ATC after removal.

Remove ATC from `novolis-audio`

• Delete `src/Novolis.Audio.Voice.Atc/`
• Remove from `Novolis.Audio.slnx`
• Update docs: `README.md`, `docs/release.md`, `docs/design.md`, `docs/getting-started.md`, `AGENTS.md`, package READMEs that mention ATC

Tests

Part D — Platform.Windows not required from generic libraries

Problem ([avalonia merge CI #30](https://github.com/Novolis-Platform/novolis-avalonia/actions/runs/26697754971/job/78685059921))

`Novolis.Avalonia.Voice` targets `net10.0` but has a compile-time PackageReference to `Novolis.Audio.Voice.Platform.Windows` (net10.0-windows10.0.19041.0). Linux CI cannot build that dependency graph (same class of error as audio before EnableWindowsTargeting on the Windows package itself).

Today `PlatformVoicePreviewFactory` uses reflection, but the package reference still pulls the Windows TFM into the Avalonia build.

Design rule

Implementation

1. Remove from `Novolis.Avalonia.Voice.csproj` and `Directory.Packages.props`: Novolis.Audio.Voice.Platform.Windows.
2. Extend `VoicePreviewController` with an optional host hook, e.g. Func<VoicePresetDraft, IVoiceService>? PlatformPreviewFactory (or IVoicePreviewVoiceFactory interface in Avalonia.Voice).

• When draft.Backend == Platform and factory is null → clear status: "Platform TTS preview requires a Windows host; set PlatformPreviewFactory."
• Sherpa/Kokoro unchanged: still use `VoicePresetPreviewFactory`.

1. Delete PlatformVoicePreviewFactory.cs from Avalonia.Voice (move wiring to host).
2. NovolisVoiceStudio (`NovolisVoiceStudio.csproj`, already net10.0-windows):

• PackageReference / ProjectReference to Novolis.Audio.Voice.Platform.Windows
• On startup: previewController.PlatformPreviewFactory = (draft) => new WindowsPlatformVoiceService(draft.Platform ?? new(), phraseology?)

1. Voice.Design — keep platform preview throwing PlatformNotSupportedException (host-provided); no Windows package reference (already true).

flowchart LR
  AvaloniaVoice[Novolis.Avalonia.Voice net10.0]
  Design[Novolis.Audio.Voice.Design]
  Studio[NovolisVoiceStudio windows]
  PlatWin[Novolis.Audio.Voice.Platform.Windows]
  AvaloniaVoice --> Design
  Studio --> AvaloniaVoice
  Studio --> PlatWin

Verify

• dotnet build novolis-avalonia on Linux (CI) — must pass without Windows targeting on Avalonia projects.
• dotnet build NovolisVoiceStudio on Windows — platform preview still works.

Can land early as a small avalonia PR before the full ATC/doc cleanup.

Part C — Breaking change and publish

GPR breaking change (document in release notes):

• `Novolis.Audio.Voice.Atc` deprecated/removed — use Novolis.Dogfooding.Voice source or copy AtcVoiceProfile pattern into your app.
• `Novolis.Audio.Voice.Design` — VoicePresetCodeTemplate.AtcDeliveryStatic / BridgeCharacter removed from GPR enum (dogfooding-only export).
• Consumers on GPR: `Novolis.Audio.Voice` + `Profiles` + optional `SherpaOnnx` / `Kokoro` / `Platform.Abstractions`; add `Platform.Windows` only in Windows executables.
• `Novolis.Avalonia.Voice` — no longer depends on Platform.Windows; hosts supply platform preview via factory.

Version: Bump `build/version.json` minor; publish novolis-audio to GPR; then update dogfood/avalonia Directory.Packages.props after packages land.

Verify: verify-nuget-only.ps1, dotnet build, dotnet test in both repos.

Recommended PR split

Non-goals (this cleanup)

• Moving `Novolis.Audio.Voice.Design` entirely to dogfooding (Avalonia stays on GPR Design).
• Publishing Novolis.Dogfooding.Voice to GitHub Packages.
• Renaming `Novolis.Audio.Voice.Phraseology` (stays generic GPR).