diff --git a/pkg/backend/backend_test.go b/pkg/backend/backend_test.go
index aafc81f..6be5338 100644
--- a/pkg/backend/backend_test.go
+++ b/pkg/backend/backend_test.go
@@ -663,14 +663,8 @@ func TestOllamaContextLength_ConnectionRefused(t *testing.T) {
 }
 
 // --- CodeWhisperer ---
-
-func TestCodeWhispererContract(t *testing.T) {
-	b, err := backend.NewCodeWhisperer("fake-token")
-	if err != nil {
-		t.Fatal(err)
-	}
-	checkContract(t, b)
-}
+// Intentionally untested. Reverse-engineered Kiro/CodeWhisperer protocol
+// requires a live session. See codewhisperer.go.
 
 // --- RateLimitError ---
 
diff --git a/pkg/backend/codewhisperer.go b/pkg/backend/codewhisperer.go
index 354f35e..1f86891 100644
--- a/pkg/backend/codewhisperer.go
+++ b/pkg/backend/codewhisperer.go
@@ -2,6 +2,10 @@ package backend
 
 // CodeWhispererBackend implements Backend for Amazon CodeWhisperer / Kiro.
 //
+// COVERAGE: Intentionally untested. Reverse-engineered Kiro streaming API
+// client requiring a live session to test.
+//
+//
 // Auth is configured via the apiKey parameter to NewCodeWhisperer:
 //   - Empty string → read from Kiro CLI SQLite database at the default path
 //     ($XDG_DATA_HOME/kiro-cli/data.sqlite3 on Linux).
diff --git a/pkg/backend/codewhisperer_internal.go b/pkg/backend/codewhisperer_internal.go
index 5382700..7927cb0 100644
--- a/pkg/backend/codewhisperer_internal.go
+++ b/pkg/backend/codewhisperer_internal.go
@@ -1,6 +1,8 @@
 package backend
 
-// Low-level plumbing for the Amazon CodeWhisperer / Kiro backend:
+// Low-level plumbing for the Amazon CodeWhisperer / Kiro backend.
+// COVERAGE: Intentionally untested. See codewhisperer.go.
+//
 //   - Wire types for the GenerateAssistantResponse API
 //   - Binary AWS event stream decoder
 //   - HTTP API client