system({
    title: "Apply JSON schemas to generated data.",
})

export default function (ctx: ChatGenerationContext) {
    const { $, env, def } = ctx

    const folder = env.vars["outputFolder"] || "."

    $`
## Files with Schema

When you generate JSON or YAML or CSV according to a named schema, 
you MUST add the schema identifier in the code fence header.
`

    def(`File ${folder}/data.json`, `...`, {
        language: "json",
        schema: "CITY_SCHEMA",
    })
}