Retain injected client diagnostic evidence

docs/roadmap/implementation.md

@@ -489,6 +489,12 @@ response-plus-error, and success followed by caller cancellation. Verify one
 dispatch despite a positive retry allowance and ownership at the existing client
 adapter boundary. Do not add methods to public `LLMClient`.
 
+**Completed: 2026-10-13.** Injected generation now records one-call response,
+completion, usage, and native-schema-request evidence without HTTP claims, while
+ordinary generation behavior remains unchanged. Validation passed:
+`go test -race ./internal/generation .`, `go vet ./...`, `go test ./...`, and
+`git diff --check`.
+
 ## Stage 11: Implement The Reachability Probe
 
 Scope: internal HTTP probe collaborator and focused use-case support decisions.