Capture destination-specific HTTP evidence

docs/roadmap/implementation.md

@@ -417,6 +417,11 @@ response, no response, credential-stripping redirect, failed redirected hop, and
 redirect-policy termination. Verify the supplied client is not mutated and
 evidence is isolated across concurrent calls. Test facts, not wrapper choreography.
 
+**Completed: 2026-10-13.** Added invocation-local last-hop HTTP evidence and
+plain GET support over a shallow copy of the configured client. Validation
+passed: `go test -race ./internal/llm`, `go vet ./internal/llm`,
+`go test ./...`, and `git diff --check`.
+
 ## Stage 8: Retain Generation Evidence Before Result Discard
 
 Scope: `PreparedGeneration` execution in `internal/llm`.