diff --git a/crates/wavekat-flow/schema/flow.v1.schema.json b/crates/wavekat-flow/schema/flow.v1.schema.json
index 595efde..0f8e812 100644
--- a/crates/wavekat-flow/schema/flow.v1.schema.json
+++ b/crates/wavekat-flow/schema/flow.v1.schema.json
@@ -42,8 +42,9 @@
     "Prompt": {
       "description": "What a component speaks: TTS text (a bare string) or a reference to a pre-rendered audio asset shipped alongside the flow.",
       "oneOf": [
-        { "type": "string" },
+        { "title": "Text", "type": "string" },
         {
+          "title": "Audio",
           "type": "object",
           "required": ["audio"],
           "properties": {
diff --git a/crates/wavekat-flow/src/model_ext.rs b/crates/wavekat-flow/src/model_ext.rs
index bb932e5..34e9cc0 100644
--- a/crates/wavekat-flow/src/model_ext.rs
+++ b/crates/wavekat-flow/src/model_ext.rs
@@ -81,12 +81,11 @@ impl Node {
 
 impl Prompt {
     /// The spoken text, or `None` for an audio-asset prompt. Handy for
-    /// traces and length validation. typify names the untagged variants
-    /// `Variant0` (text) and `Variant1` (`{ audio }`).
+    /// traces and length validation.
     pub fn as_text(&self) -> Option<&str> {
         match self {
-            Prompt::Variant0(t) => Some(t.as_str()),
-            Prompt::Variant1 { .. } => None,
+            Prompt::Text(t) => Some(t.as_str()),
+            Prompt::Audio { .. } => None,
         }
     }
 }
diff --git a/packages/flow-schema/src/generated/flow.v1.schema.json b/packages/flow-schema/src/generated/flow.v1.schema.json
index 595efde..0f8e812 100644
--- a/packages/flow-schema/src/generated/flow.v1.schema.json
+++ b/packages/flow-schema/src/generated/flow.v1.schema.json
@@ -42,8 +42,9 @@
     "Prompt": {
       "description": "What a component speaks: TTS text (a bare string) or a reference to a pre-rendered audio asset shipped alongside the flow.",
       "oneOf": [
-        { "type": "string" },
+        { "title": "Text", "type": "string" },
         {
+          "title": "Audio",
           "type": "object",
           "required": ["audio"],
           "properties": {
diff --git a/packages/flow-schema/src/generated/model.ts b/packages/flow-schema/src/generated/model.ts
index c02638c..fc4b350 100644
--- a/packages/flow-schema/src/generated/model.ts
+++ b/packages/flow-schema/src/generated/model.ts
@@ -8,15 +8,8 @@ export type Node = GreetingNode | HoursNode | MenuNode | RingNode | MessageNode
 /**
  * What a component speaks: TTS text (a bare string) or a reference to a pre-rendered audio asset shipped alongside the flow.
  */
-export type Prompt =
-  | string
-  | {
-      /**
-       * Audio asset ref. A generated-clip ref is a voice_prompts id matching ^vprompt_[a-z0-9]+$.
-       */
-      audio: string;
-      [k: string]: unknown;
-    };
+export type Prompt = Text | Audio;
+export type Text = string;
 /**
  * The cue a message node plays between its prompt and the start of recording.
  */
@@ -69,6 +62,13 @@ export interface GreetingNode {
   exits?: Exits;
   [k: string]: unknown;
 }
+export interface Audio {
+  /**
+   * Audio asset ref. A generated-clip ref is a voice_prompts id matching ^vprompt_[a-z0-9]+$.
+   */
+  audio: string;
+  [k: string]: unknown;
+}
 /**
  * Wired exits: exit name → target node id. Which names are valid is a property of the node's kind and is checked by the validator, not by this schema.
  */
diff --git a/packages/flow-schema/src/generated/schema.ts b/packages/flow-schema/src/generated/schema.ts
index 244eb9b..bedf61a 100644
--- a/packages/flow-schema/src/generated/schema.ts
+++ b/packages/flow-schema/src/generated/schema.ts
@@ -54,9 +54,11 @@ const schema = {
       "description": "What a component speaks: TTS text (a bare string) or a reference to a pre-rendered audio asset shipped alongside the flow.",
       "oneOf": [
         {
+          "title": "Text",
           "type": "string"
         },
         {
+          "title": "Audio",
           "type": "object",
           "required": [
             "audio"
diff --git a/schema/flow.v1.schema.json b/schema/flow.v1.schema.json
index 595efde..0f8e812 100644
--- a/schema/flow.v1.schema.json
+++ b/schema/flow.v1.schema.json
@@ -42,8 +42,9 @@
     "Prompt": {
       "description": "What a component speaks: TTS text (a bare string) or a reference to a pre-rendered audio asset shipped alongside the flow.",
       "oneOf": [
-        { "type": "string" },
+        { "title": "Text", "type": "string" },
         {
+          "title": "Audio",
           "type": "object",
           "required": ["audio"],
           "properties": {