Introduces the architectural spine for the Wyrdnote engine layer per
the spec at outputs/wyrdnote/2026-05-10-engine-architecture-spec.md
in the CORBEL-Main workspace, Codex-reviewed 2026/05/10.
Clean-room derivative of VoiceInk's TranscriptionService /
TranscriptionServiceRegistry / TranscriptionPipeline shape. Built from
the architectural pattern only; no GPL-3.0 code, comments, or
identifiers lifted. Wyrdnote names, control flow, and trait signatures
are original.
What this lands:
crates/cloud-providers/src/provider.rs (new, 184 lines)
TranscriptionProvider async trait. Object-safe via async_trait so
Arc<dyn TranscriptionProvider> is the canonical shape. Lives in
cloud-providers (not transcription) per D7 so an OEM licensee
implementing the trait depends only on this crate plus magnotia-core
(no transcription internals leaked through the trait surface).
Surrounding types: ProviderId (lower-kebab-case), ProviderKind,
NetworkRequirement, CostClass, ProviderCapabilities, EngineProfile,
ProviderTranscript. Compile-time object-safety witness in tests.
crates/cloud-providers/Cargo.toml (modified)
Adds async-trait + serde dependencies.
crates/cloud-providers/src/lib.rs (modified)
Re-exports the provider surface.
crates/transcription/src/registry.rs (new, 183 lines)
EngineRegistry: catalogue of providers keyed by ProviderId. Push-style
registration, default-provider id captured at construction. Read-only
after boot. Full unit-test coverage: empty default, register/get
round-trip, default-resolves-after-registration, re-register replaces,
ids enumeration.
crates/transcription/src/orchestrator.rs (new, 286 lines)
LocalProviderAdapter wraps Arc<LocalEngine>, presents async
TranscriptionProvider upward via tokio::task::spawn_blocking. Per D7
the adapter lives in the orchestrator, NOT as impl TranscriptionProvider
for LocalEngine — this keeps the dependency edge one-directional and
avoids leaking async-runtime requirements onto the synchronous
Transcriber trait.
Orchestrator: single transcribe() entry point; resolves a provider
from the registry, derives TranscriptionOptions from the EngineProfile,
dispatches. Returns a clear error when an unregistered provider is
named. Unit tests use a mock CannedProvider to validate dispatch,
error handling, and option routing without booting a real model.
crates/transcription/Cargo.toml (modified)
Depends on magnotia-cloud-providers + async-trait. Dev-dep tokio
gains macros + rt-multi-thread features for #[tokio::test].
crates/transcription/src/lib.rs (modified)
Exports Orchestrator, EngineRegistry, LocalProviderAdapter, and
re-exports the provider trait surface so downstream crates depend
only on magnotia-transcription for both local engines and the trait.
KNOWN-ISSUES.md (modified)
Adds KI-06: existing dictation, live, and meeting commands still call
LocalEngine::transcribe_sync directly via pick_engine. The orchestrator
path is dormant until a Phase A.1 follow-up commit migrates the call
sites. Cloud providers (Phase G) cannot be exercised end-to-end until
the rewire lands. Phasing rationale: this commit lands the abstractions
cleanly with full test coverage; the rewire is a separate diff so the
chunking + post-processing logic in transcribe_file moves without
inflating this commit beyond review fidelity.
Test results: 9 new tests pass (orchestrator: dispatches, errors-on-
unregistered, routes-initial-prompt, object-safe; registry: empty-default,
round-trip, default-resolves, re-register, ids-list). Pre-existing
59 transcription tests + 5 cloud-providers tests still green.
cargo check --workspace clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Jake
6bc8acccce