Logging and Usage

Downcity does not decide where your logs live, but hooks give you one consistent integration point.

Recommended fields

• user_id
• city_id
• model
• started_at
• ended_at
• status
• error

Where to record

ai.hook.after(async (ctx) => {
  await logService.write({
    user_id: ctx.user?.user_id,
    city_id: ctx.city?.city_id,
    model: ctx.variant?.id,
    model_meta: ctx.variant?.meta,
    started_at: ctx.started_at,
    ended_at: ctx.ended_at,
  });
});

Once many products share one runtime, usage data becomes centralized by default, which makes cost analysis and business decisions much easier later.