EPIC R03 (Team Duy) - one provider catalogue, one routing flow, one usage seam.
R03-T01 tests/contracts/test_providers.py
29 contract tests every provider must satisfy: canonical assistant message,
streamed text == returned content, reasoning never joins the answer, parsed
tool arguments, ProviderError for every failure. Real adapters exercised
offline by stubbing Provider._request.
R03-T02 domain/models/provider_descriptor.py
infrastructure/providers/provider_registry.py
Provider facts declared once (was split across providers/factory.py,
DEFAULT_CONFIG and PROVIDER_LABELS). ProviderRegistry.build() also stamps the
descriptor id onto the instance, so ollama/github_copilot/codex usage is no
longer all attributed to "openai_compat", and never mutates the caller config.
R03-T03 application/model_routing/routing_application_service.py
Pure-Python routing policy with four modes: Off, Auto, Manual and the new
Fallback (switch only AFTER the current model fails). Depends on a RoutingPort
protocol; production wires the existing core.routing engine underneath.
R03-T04/T05 ui/chat_panel.py, ui/co4e_tab.py, ui/folder_tab.py
Three near-identical routing copies (~40 lines each) replaced by a call to
ctx.routing_application() plus a confirm callback. Mode vocabulary now lives
in one place (normalize_mode/is_valid_mode) instead of four literal tuples.
R03-T06 infrastructure/telemetry/usage_sink.py
Token usage extracted from both providers into UsageEvent + UsageEventSink.
Estimation pinned against core.usage_tracker so no recorded number changes.
Also fixes a deadlock introduced while wiring AppContext: routing_application()
held _routing_lock and called routing(), which takes the same non-reentrant lock.
Suite: 186 passed, 1.22s. check_imports: PASS. All new files < 400 LOC.
2 pre-existing failures remain in test_config_security.py (EPIC R02/Team Nam).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
EPIC R01 (Team Duy) - safety net before the parallel refactor starts.
R01-T01 docs/architecture/ADR-001-layered-architecture.md
4-tier boundaries, allowed dependency directions, invariants I1-I6 and
the strangler-fig migration strategy.
R01-T02 tests/fakes/{fake_provider,fake_tool_executor}.py
Scripted, offline Provider and extra-tool executor doubles.
R01-T03 scripts/check_imports.py
AST-based Clean Architecture Guard (CASAN Check 3). Also covers relative
imports and function-local imports; ASCII-only output for cp932 consoles.
R01-T04 tests/characterization/test_run_cowork.py
13 snapshot tests pinning run_cowork's current observable contract before
EPIC R04 moves its orchestration into application/.
R01-T05 docs/architecture/dormant-code.md
Import-graph scan: 43 unimported modules verified down to 6 genuinely
dormant items (~1887 LOC); the rest run via subprocess/CLI entry points.
tests/conftest.py binds `cowork_local` to THIS checkout by absolute path -
previously sys.path discovery could import a sibling checkout and the suite
would silently test the wrong code.
Suite: 104 passed, 1.08s (2 pre-existing failures in test_config_security.py
remain - config.py still ships a hardcoded default password, EPIC R02/Team Nam).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
anhtnm1andClaude Opus 5
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