- Extract SubtitleWriter classes (SrtWriter, AssWriter, VttWriter) to infrastructure/subtitle_writer.py
- Add create_subtitle_writer() factory function
- Remove old SubtitleWriter class and _format_timestamp from conversion_runner.py
- Use create_subtitle_writer() factory from infrastructure layer
- Add tests/test_subtitle_writer.py with 28 tests covering SrtWriter, AssWriter, VttWriter
- All tests match old _format_timestamp behavior
- Add .gitattributes with text=auto eol=lf for all text files
- Renormalize all files in index to LF line endings
- Fixes massive whitespace-only diffs between main and feature branch
- Create tests/plugins/ with auto-discovery fixtures and generic tests
- Add conftest.py with plugin_ids, loaded_plugin, host_context fixtures
- Add test_all_plugins.py with 3 test classes:
- TestAllPluginsManifest: validates manifest structure
- TestAllPluginsEngine: validates engine lifecycle contract
- TestAllPluginsCapabilities: validates capability implementation
- Update docs/testing.md with auto-discovery documentation
- Plugin-specific tests remain in tests/test_*_plugin.py for integration
New plugins in plugins/ are now automatically tested without manual test creation.
- Add to PluginManifest
- None = not declared (use VoiceLister fallback)
- () = explicitly no static voices
- Non-empty = static catalog available without Engine instantiation
- Update get_voices() to check manifest first, fall back to Engine
- Declare 54 Kokoro voices and 10 SuperTonic voices in manifests
- Remove hardcoded voice lists from engine.py files
- Engine.listVoices() now returns [] (manifest is source of truth)
- Clean up dead create_pipeline() kwargs (sample_rate, auto_download, total_steps)
- SuperTonic plugin uses internal defaults
- total_steps is per-request parameter via Pipeline.__call__() kwargs
- Add clear_preview_pipelines() for resource cleanup
- Fix test mocks to override listVoices()
- Update Architecture Amendment #1 doc
- Add 96 behavioral regression tests parametrized for both Kokoro and SuperTonic
- Remove legacy TTSBackendRegistry tests (13) from behavioral suite
- Remove mock-only capability tests (Preview, Streaming, Cancellation) not implemented by either plugin
- Fix get_voices() to pass required args to create_engine() + error handling
- All 598 tests pass
- Add tests/contracts/engine_contract.py with shared Engine/Session tests
- TestKokoroEngineContract and TestSuperTonicEngineContract inherit from it
- Eliminates protocol test duplication between plugins
- Any new plugin just inherits EngineContractMixin to verify compliance
- Add PluginManager singleton for plugin discovery and engine caching
- Add CompatBackend adapter wrapping Engine/EngineSession into old create_backend() API
- Update tts_plugin/__init__.py with public exports
- Migrate preview.py and its test to use compat.create_backend
- Add integration and plugin manager contract tests
Implement first TTS plugin using new Plugin Architecture:
- plugins/kokoro/: Plugin package with manifest and entry point
- plugins/kokoro/engine.py: KokoroEngine and KokoroSession adapters
- Wraps existing KokoroBackend without modifying it
- Implements VoiceLister capability
- Satisfies Engine/EngineSession protocol
- Passes all 163 contract tests
Tests:
- Plugin loading through Plugin Loader
- Manifest validation
- Engine creation and lifecycle
- Session synthesis and dispose
- VoiceLister capability
15 new tests for Kokoro plugin.
Implement plugin loading and validation:
- loader.py: discover, import, validate plugins
- validate PLUGIN_MANIFEST, MODEL_REQUIREMENTS, create_engine
- validate api_version compatibility (major must match)
- validate capabilities (reject unknown)
- diagnostic messages for all error cases
- no partial registration after error
Test plugins:
- fake_plugin: minimal valid plugin for testing
- missing_manifest: no PLUGIN_MANIFEST
- invalid_api_version: major version mismatch
- invalid_capabilities: unknown capabilities
- missing_create_engine: no create_engine function
- import_error: raises ImportError during import
- missing_model_requirements: no MODEL_REQUIREMENTS
39 new tests covering all loader functionality.
- Add resolve_backend_for_voice() to TTSBackendRegistry
- Add module-level wrapper resolve_backend_for_voice()
- Simplify _infer_provider_from_spec() to use registry API
- Simplify _supertonic_voice_from_spec() to only normalize
- Add 11 test cases for the new method
Resolution rules:
1. Empty spec -> fallback
2. Kokoro formula (* or +) -> kokoro
3. Exact voice ID match -> backend id
4. Unknown voice -> fallback
Make the Kokoro voice list an internal implementation detail of the
backend instead of a shared constant. The rest of the project already
accesses voices via get_metadata('kokoro').voices.
- Move VOICES_INTERNAL from constants.py to kokoro.py as _VOICES_INTERNAL
- Update tests to use get_metadata('kokoro').voices instead of importing
the constant directly
Add voices field to TTSBackendMetadata so each backend's supported
voice list is part of its metadata rather than external constants.
- Add voices: tuple[str, ...] = () to TTSBackendMetadata
- Create _KOKORO_METADATA / _SUPERTONIC_METADATA as single source
of truth for both metadata property and registry registration
- Update KokoroBackend.get_available_voices() to use self.metadata.voices
- Update SupertonicBackend.get_available_voices() to use self.metadata.voices
- Add tests for voices field, metadata voice content, and unified instance identity
- Create KokoroBackend class implementing TTSBackend protocol
- Move all KPipeline interaction inside KokoroBackend
- Update LoadPipelineThread to create backend via create_backend()
- Update ConversionThread and VoicePreviewThread to accept backend
- Replace np_module/kpipeline_class parameters with single backend
- Add 24 unit tests for KokoroBackend
- KPipeline is now an internal implementation detail of KokoroBackend
Encapsulate SupertonicPipeline as an internal detail of
SupertonicBackend. The factory create_supertonic_backend() now
returns a SupertonicBackend instance instead of a raw
SupertonicPipeline, satisfying the TTSBackend protocol with
metadata, synthesize, get_available_voices, get_supported_formats,
and get_info methods. Backward-compatible __call__ delegates to
the internal pipeline.
Migrate all preview/debug/conversion pipeline creation to use
TTSBackendRegistry.create_backend() instead of direct imports:
- debug_tts_runner._load_pipeline(): Kokoro via registry
- preview.get_preview_pipeline(): Kokoro via registry
- preview.generate_preview_audio(): Supertonic via registry
- voice.get_preview_pipeline(): Kokoro via registry
- conversion_runner._load_pipeline(): both backends via registry
- conversion_runner inline pipeline creation: both via registry
- test: update mock to target tts_backend_registry.create_backend
- Add create_kokoro_backend() factory in kokoro.py
- Add create_supertonic_backend() factory in supertonic.py
- Auto-discover backend modules in __init__.py via pkgutil
- Both backends register themselves on import
- Tests verify registration and factory callables
- TTSBackendRegistry class with register(), list_backends(), get_metadata(), create_backend()
- Global registry singleton with register_backend() and create_backend() convenience functions
- Unit tests for registry operations
Moved SupertonicPipeline from abogen/tts_supertonic.py to
abogen/tts_backends/supertonic.py and load_numpy_kpipeline from
abogen/utils.py to abogen/tts_backends/kokoro.py.
Git correctly detects the Supertonic file as a rename (R),
preserving full commit history.
- New package: abogen/tts_backends/
- __init__.py (package marker)
- supertonic.py (SupertonicPipeline, moved from tts_supertonic.py)
- kokoro.py (load_numpy_kpipeline, moved from utils.py)
- abogen/utils.py: re-exports load_numpy_kpipeline for backward compat
- All imports updated to new canonical paths
Artem Akymenko