how can i create spec file (.json or .yaml) autometically

[ghost]

i want to create a spec file autometically (.json or .yaml), can someone tell me how can i do this in hono Cloudflare Workers,

import { OpenAPIHono } from '@hono/zod-openapi'
import { User, youtubeSearchAllVideos } from './routes/UserRoutes'
import { env } from 'hono/adapter'
import { swaggerUI } from '@hono/swagger-ui'

do i need to install something extra to create a spec file