Session configuration templates are now proceeded by narratio session init; all other commands require concrete configuration

internal/app/session_cli_test.go

@@ -10,7 +10,7 @@ import (
 	"gitea.maximumdirect.net/eric/narratio/internal/config"
 )
 
-func TestPlanUsesDiscoveredSessionTemplateWithSessionIDs(t *testing.T) {
+func TestPlanRejectsDiscoveredSessionTemplate(t *testing.T) {
 	workspaceRoot := t.TempDir()
 	pipelinePath, campaignPath, sessionPath := writeValidConfigFiles(t, workspaceRoot)
 
@@ -32,16 +32,20 @@ inputs:
 	t.Cleanup(func() { config.DefaultSessionConfigSearchPaths = origSessionDefaults })
 
 	var out bytes.Buffer
-	if err := Plan(context.Background(), []string{
+	err := Plan(context.Background(), []string{
 		"--config", pipelinePath,
 		"--campaign", campaignPath,
 		"--session-id", "2026-04-04",
 		"--previous-session-id", "2026-03-28",
-	}, &out); err != nil {
-		t.Fatalf("Plan() error = %v", err)
+	}, &out)
+	if err == nil {
+		t.Fatal("expected error, got nil")
 	}
-	if !strings.Contains(out.String(), "narratio plan: workdir prepared") {
-		t.Fatalf("output = %q, want plan output", out.String())
+	if !strings.Contains(err.Error(), "session.yml must be concrete") {
+		t.Fatalf("error = %q, want concrete session guidance", err.Error())
+	}
+	if !strings.Contains(err.Error(), "run narratio session init") {
+		t.Fatalf("error = %q, want session init guidance", err.Error())
 	}
 }