fix: display MCP tag for prompts in autocomplete but not in prompt (#6531)

packages/opencode/src/command/index.ts

@@ -27,6 +27,7 @@ export namespace Command {
       description: z.string().optional(),
       agent: z.string().optional(),
       model: z.string().optional(),
+      mcp: z.boolean().optional(),
       // workaround for zod not supporting async functions natively so we use getters
       // https://zod.dev/v4/changelog?id=zfunction
       template: z.promise(z.string()).or(z.string()),
@@ -94,6 +95,7 @@ export namespace Command {
     for (const [name, prompt] of Object.entries(await MCP.prompts())) {
       result[name] = {
         name,
+        mcp: true,
         description: prompt.description,
         get template() {
           // since a getter can't be async we need to manually return a promise here