feat(R03): unify model routing and centralise the provider catalogue
EPIC R03 (Team Duy) — Model Providers & Routing. All six tasks done.
R03-T02 — Provider catalogue
domain/models/provider_descriptor.py ProviderDescriptor (frozen), WireProtocol, AuthKind
infrastructure/providers/provider_registry.py
thread-safe registry: id/alias lookup, dynamic
lookup by model id, adapter selection by protocol
providers/factory.py drops its own _REGISTRY table and delegates to the
registry, still raising ProviderError for callers
R03-T03 — RoutingApplicationService (pure Python, 4 modes)
application/model_routing/routing_models.py
RoutingMode (off/auto/manual/fallback),
RoutingRequest (immutable snapshot), RouteEvaluation,
RoutingOutcome
application/model_routing/routing_application_service.py
the single decision flow, reached through two narrow
ports plus a caller-supplied confirm callback, so no
Qt import is needed
application/model_routing/core_routing_adapter.py
binds the ports to core/routing and AppContext
Fallback is a new resilience mode: keep the selected model while it can serve the turn,
re-route only when it cannot. Wired end to end through config.py, state.py,
ui/routing_toggle.py and i18n.py (EN/JA/VI).
R03-T04 / T05 — Remove the duplicated routing flow
ui/chat_panel.py (#L638), ui/co4e_tab.py, ui/folder_tab.py each drop ~35 lines of copied
logic and call the shared service; the widgets now only build a RoutingRequest, host the
Manual-mode modal and render the outcome.
R03-T06 — Token usage as an event
infrastructure/telemetry/usage_sink.py UsageEvent + UsageEventSink protocol, with tracker,
in-memory and composite sinks
providers/openai_compat.py, providers/anthropic.py
publish a UsageEvent instead of writing to the
usage tracker themselves
core/usage_tracker.py adds current_context() so a sink can borrow and
restore a thread's attribution
R03-T01 — Contract tests
tests/contracts/test_providers.py parametrises over every provider in the registry: chat()
signature, canonical assistant message, normalised tool calls, response closed, tool schema
translation, ProviderError, list_models/test_connection, one UsageEvent per turn.
Test infrastructure fix (required to verify any of the above): tests/conftest.py used to put
the repository's PARENT directory on sys.path, so `import cowork_local.*` resolved against
whichever sibling folder happened to carry that name — on a dev machine, an unrelated older
checkout. The suite reported green while exercising different code. The conftest now binds
this checkout to the cowork_local name in sys.modules.
Verification
pytest tests/ 236 passed in ~1.8s (102 before this change)
scripts/check_imports.py PASS, 0 forbidden imports in domain/ and application/
new production files largest is 288 lines, all under the 400 LOC ceiling
new tests 134 (50 contract, 70 unit, 14 integration), all offline
scripts/run_quality_gate.py does not exist yet (R10-T02), so DoD item 7 was covered by
check_imports.py plus the full suite.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Claude Opus 5
+31
-24
@@ -1849,36 +1849,43 @@ class Co4ETab(QWidget):
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def _apply_co4e_routing(self, request: str) -> str:
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"""Route this Co4E turn to the best-fit model. Returns the model id to
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use ('' → provider default) and sets ``self._co4e_routed_provider`` when
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a cross-provider switch is chosen. Off → no-op. Manual → confirm first.
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Never raises — falls back to the default model on any error."""
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a cross-provider switch is chosen.
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R03-T05: the Off/Auto/Manual/Fallback rules are no longer re-implemented
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here — they come from the shared ``RoutingApplicationService``, so Co4E,
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the Cowork chat and AI-Edit can never drift apart again. This method only
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adapts between Co4E's state and the service's DTOs. Never raises — falls
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back to the default model on any error.
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"""
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self._co4e_routed_provider = None
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if not (request or "").strip():
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return ""
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try:
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mode = self.ctx.project_routing_mode("co4e") # per-workspace mode
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if mode == "off":
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return ""
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service = self.ctx.routing()
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from ..application.model_routing import (
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RoutingRequest,
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build_routing_application_service,
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)
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from .routing_toggle import confirm_switch
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cur_provider = self.ctx.config.active_provider
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cur_model = self.ctx.config.provider_conf(cur_provider).get("model", "")
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result = service.route("co4e", request, cur_provider, cur_model, mode_override=mode)
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if not result.should_switch:
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return ""
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target = result.target()
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if target is None:
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return ""
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to_provider, to_model = target
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if mode == "manual":
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from .routing_toggle import confirm_switch
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timeout = float(self.ctx.config.routing.get("confirm_timeout_sec", 60) or 60)
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if not confirm_switch(self, result.decision, timeout):
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return ""
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self._co4e_routed_provider = to_provider
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outcome = build_routing_application_service(self.ctx).resolve(
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RoutingRequest(
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surface="co4e",
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prompt=request,
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current_provider=cur_provider,
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current_model=cur_model,
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),
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confirm=lambda decision, timeout: confirm_switch(self, decision, timeout),
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)
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if not outcome.switched:
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return "" # '' keeps the provider's configured default model
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# Remembered so the worker's build_provider_for() can follow a
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# cross-provider switch, not just a model change.
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self._co4e_routed_provider = outcome.provider
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self._append_chat("system", tr(
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"routing.switched_notice",
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model=to_model, task=result.task_type.value,
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gain=f"{result.decision.score_gain:.2f}"))
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return to_model
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model=outcome.model, task=outcome.task_type,
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gain=f"{outcome.score_gain:.2f}"))
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return outcome.model
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except Exception: # noqa: BLE001 — routing must never block a Co4E turn
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self._co4e_routed_provider = None
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return ""
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