Plugin SDK: move generic message tool schemas out of core

src/plugin-sdk/channel-runtime.ts

@@ -34,7 +34,7 @@ export type * from "../channels/plugins/types.js";
 export * from "../channels/plugins/config-writes.js";
 export * from "../channels/plugins/directory-adapters.js";
 export * from "../channels/plugins/media-payload.js";
-export * from "../channels/plugins/message-tool-schema.js";
+export * from "./message-tool-schema.js";
 export * from "../channels/plugins/normalize/signal.js";
 export * from "../channels/plugins/normalize/whatsapp.js";
 export * from "../channels/plugins/outbound/direct-text-media.js";

src/plugin-sdk/message-tool-schema.ts

@@ -0,0 +1,28 @@
+import { Type } from "@sinclair/typebox";
+import type { TSchema } from "@sinclair/typebox";
+import { stringEnum } from "../agents/schema/typebox.js";
+
+export function createMessageToolButtonsSchema(): TSchema {
+  return Type.Array(
+    Type.Array(
+      Type.Object({
+        text: Type.String(),
+        callback_data: Type.String(),
+        style: Type.Optional(stringEnum(["danger", "success", "primary"])),
+      }),
+    ),
+    {
+      description: "Button rows for channels that support button-style actions.",
+    },
+  );
+}
+
+export function createMessageToolCardSchema(): TSchema {
+  return Type.Object(
+    {},
+    {
+      additionalProperties: true,
+      description: "Structured card payload for channels that support card-style messages.",
+    },
+  );
+}