diff --git a/src/infra/outbound/message-action-params.ts b/src/infra/outbound/message-action-params.ts
index ea527a74bd6..9f23419f7dc 100644
--- a/src/infra/outbound/message-action-params.ts
+++ b/src/infra/outbound/message-action-params.ts
@@ -422,3 +422,20 @@ export function parseComponentsParam(params: Record<string, unknown>): void {
     throw new Error("--components must be valid JSON");
   }
 }
+
+export function parseInteractiveParam(params: Record<string, unknown>): void {
+  const raw = params.interactive;
+  if (typeof raw !== "string") {
+    return;
+  }
+  const trimmed = raw.trim();
+  if (!trimmed) {
+    delete params.interactive;
+    return;
+  }
+  try {
+    params.interactive = JSON.parse(trimmed) as unknown;
+  } catch {
+    throw new Error("--interactive must be valid JSON");
+  }
+}