Keep session IDs on repair requests and retire completed plans

internal/usecase/runner_test.go

@@ -1690,6 +1690,41 @@ func TestRunnerRunStructuredRepairRemainsBoundedAndUsesEffectiveModelSettings(t
 	}
 }
 
+func TestRunnerRunRepairCarriesEffectiveSessionID(t *testing.T) {
+	llmClient := &fakeLLM{resp: &domain.GenerateResponse{Content: `{"broken":`}}
+	runner := NewRunnerWithRepairer(
+		&fakePromptRepo{def: promptDef(domain.FormatJSON, domain.ValidationJSON, 1)},
+		&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{
+			"exec": {ID: "exec", Endpoint: "http://example.test/v1", Model: "model"},
+		}},
+		nil,
+		defaultArtifactReader(),
+		defaultRenderer(),
+		llmClient,
+		validate.NewStandardValidator("."),
+		NewDefaultOutputRepairer(llmClient),
+	)
+
+	result, err := runner.Run(context.Background(), domain.RunRequest{
+		PromptID:  "p",
+		ProfileID: "exec",
+		SessionID: " repair-session ",
+		Inputs:    singleInputRef(),
+	})
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+	if llmClient.calls != 2 {
+		t.Fatalf("expected initial generation and one repair, got %d calls", llmClient.calls)
+	}
+	if llmClient.lastReq.Prompt.SessionID != "repair-session" {
+		t.Fatalf("expected repair generation to retain effective session, got %q", llmClient.lastReq.Prompt.SessionID)
+	}
+	if result.SessionID != "repair-session" {
+		t.Fatalf("expected result to retain effective session, got %q", result.SessionID)
+	}
+}
+
 func TestRunnerRunJSONSchemaRepairCarriesStructuredOutputSpec(t *testing.T) {
 	def := promptDef(domain.FormatJSON, domain.ValidationJSONSchema, 1)
 	def.Validation.SchemaPath = "events.schema.json"