/**

* `set_title` — lets the Think agent name the project with a short, human

* friendly display title. This is a no-op tool inside the ThinkAgent DO: it

* simply echoes the chosen title back as its output. The host behavior

* (`ThinkCodingBehavior.translateChunk`) observes the tool's streamed output

* — the same channel it uses for `deploy_space` — and persists the title to

* the app state + database. No RPC round-trip through the parent agent is

* required.

*/

import { tool, type Tool } from 'ai';

import { z } from 'zod';

const DESCRIPTION = [

'Set a short, human-friendly display title for this project (shown in the app list and preview header).',

'',

'Call this once, early, ONLY IF the project does not yet have a clear name — for example when the user request is a long or vague description rather than a concise product name. Keep it under ~60 characters, in Title Case, with no surrounding quotes.',

'',

'Do not call this on every turn; a single good title is enough unless the user asks to rename.',

].join('\n');

export function createSetTitleTool(): Tool {

return tool({

description: DESCRIPTION,

inputSchema: z.object({

title: z

.string()

.describe('The short display title, ideally under 60 characters.'),

}),

execute: async (args: { title: string }) => {

const title = (args.title ?? '').trim();

if (title.length === 0) {

return JSON.stringify({ error: 'Title must not be empty.' });

}

return JSON.stringify({ ok: true, title });

},

});

}