diff --git a/internal/cli/run_test.go b/internal/cli/run_test.go
index 2a031ab..e35c59d 100644
--- a/internal/cli/run_test.go
+++ b/internal/cli/run_test.go
@@ -11,6 +11,7 @@ import (
 	"sort"
 	"strings"
 	"testing"
+	"time"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/artifacts"
 	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
@@ -25,6 +26,7 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/merge/appendorder"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/normalize/noop"
 	jsonoutput "gitea.maximumdirect.net/eric/notarius/internal/modules/output/json"
+	"gitea.maximumdirect.net/eric/scriptorium"
 )
 
 func TestRunNoArgsWritesUsageToStdout(t *testing.T) {
@@ -179,6 +181,86 @@ func TestProductionCatalogIncludesDefaultModules(t *testing.T) {
 	}
 }
 
+func TestProductionPromptAssetsRegisterAndPrepareDndPrompts(t *testing.T) {
+	registry, err := productionPromptAssets()
+	if err != nil {
+		t.Fatalf("productionPromptAssets() error = %v, want nil", err)
+	}
+	promptFS, err := registry.PromptFS()
+	if err != nil {
+		t.Fatalf("PromptFS() error = %v, want nil", err)
+	}
+	for _, name := range []string{
+		"common-dnd-system.md",
+		"common-dnd-transcript.md",
+		"common-dnd-references.md",
+		"dnd.scenes/dnd.scenes.yaml",
+		"dnd.scenes/task.md",
+		"dnd.scenes/instructions.md",
+		"dnd.spells/dnd.spells.yaml",
+		"dnd.spells/task.md",
+		"dnd.spells/instructions.md",
+	} {
+		if _, err := promptFS.Open(name); err != nil {
+			t.Fatalf("PromptFS().Open(%q) error = %v, want nil", name, err)
+		}
+	}
+
+	options, err := registry.ScriptoriumOptions()
+	if err != nil {
+		t.Fatalf("ScriptoriumOptions() error = %v, want nil", err)
+	}
+	options = append(options, scriptorium.WithProfiles(scriptorium.OpenAICompatibleProfile(scriptorium.OpenAICompatibleProfileConfig{
+		ID:       "production-test-profile",
+		Endpoint: "http://127.0.0.1:1/v1",
+		Model:    "production-test-model",
+	})))
+	engine, err := scriptorium.NewEngine(scriptorium.Config{Timeout: time.Second}, options...)
+	if err != nil {
+		t.Fatalf("NewEngine() error = %v, want nil", err)
+	}
+
+	scenesPrepared, err := engine.Prepare(context.Background(), scriptorium.RunRequest{
+		PromptID:      scenes.PromptID,
+		PromptVersion: scenes.ResponseSchemaVersion,
+		ProfileID:     "production-test-profile",
+		Inputs: map[string]scriptorium.ArtifactRef{
+			"transcript": scriptorium.InlineWithURI("file:///session.json", `{"id":"session-1","segments":[{"id":"u1","text":"We enter the crypt."}]}`),
+			"roster":     scriptorium.Inline("Aria: cleric"),
+			"glossary":   scriptorium.Inline("Brightmantle: temple"),
+		},
+	})
+	if err != nil {
+		t.Fatalf("scene Prepare() error = %v, want nil", err)
+	}
+	if got := len(scenesPrepared.Messages); got != 5 {
+		t.Fatalf("scene message count = %d, want 5", got)
+	}
+	if !strings.Contains(scenesPrepared.Messages[3].Content, "Divide the provided transcript") {
+		t.Fatalf("scene task message missing module text: %q", scenesPrepared.Messages[3].Content)
+	}
+
+	spellsPrepared, err := engine.Prepare(context.Background(), scriptorium.RunRequest{
+		PromptID:      spells.PromptID,
+		PromptVersion: spells.SchemaVersion,
+		ProfileID:     "production-test-profile",
+		Inputs: map[string]scriptorium.ArtifactRef{
+			"transcript": scriptorium.InlineWithURI("file:///session.json", `{"id":"session-1","segments":[{"id":"u1","text":"Mira casts shield."}]}`),
+			"roster":     scriptorium.Inline("Mira: wizard"),
+			"glossary":   scriptorium.Inline("Shield: abjuration"),
+		},
+	})
+	if err != nil {
+		t.Fatalf("spell Prepare() error = %v, want nil", err)
+	}
+	if got := len(spellsPrepared.Messages); got != 5 {
+		t.Fatalf("spell message count = %d, want 5", got)
+	}
+	if !strings.Contains(spellsPrepared.Messages[3].Content, "Extract Dungeons & Dragons spell-cast artifacts") {
+		t.Fatalf("spell task message missing module text: %q", spellsPrepared.Messages[3].Content)
+	}
+}
+
 func TestRunConfigValidateUsesProductionCatalogByDefault(t *testing.T) {
 	configPath := writeTestConfig(t, mvpConfigYAML("dnd-session", "dnd/spells"))
 	var stdout bytes.Buffer