Use resolved targets for client routing

docs/roadmap/implementation.md

@@ -71,6 +71,11 @@ introduce a new ownership subsystem.
 
 ## Stage 1: Remove Client-Level Routing Fallbacks
 
+**Completed:** Client routing now uses the resolved target; constructor fixtures
+and integration guidance were migrated. With Go 1.27.3, `go test ./internal/llm
+./internal/generation ./internal/configuration ./internal/usecase ./internal/engine`
+passed, including loaded-target coverage.
+
 **Finding:** 1. **Files:** `internal/llm/openai_compatible_client.go`, client
 fixtures/tests, `internal/engine/engine.go` caller verification, `docs/internal/llm.md`.