Generated code is a genuinely good starting point in 2026. It is also, by definition, the average of every codebase the model has seen. Average is fine for the prototype; it is not what you want when real money starts flowing through your app.
The four-area checklist
Every CodeSky-built app we promote to production gets the same hardening pass. Four areas, in order.
1. Auth edges
The happy-path login is solid. Look at the edges:
- What happens on token refresh during a long-running upload?
- What happens when a user logs out on tab A while still active on tab B?
- What happens when SSO returns a stale email?
Generated apps usually handle the first two; the third is almost always a manual fix.
2. Webhook idempotency
Stripe will retry. Slack will retry. Your bank will retry. Idempotency keys belong in code, not in your head. We add a tiny received_events table on every project, indexed on the upstream event id, and reject duplicates explicitly.
3. Observability
"Add logging" is a bad ticket; "log every request, response status, user id, and a correlation id" is a good ticket. Generated apps log enough to debug the prototype. Add structured fields before the first paying customer, not after.
4. Background work
Anything that takes more than 250ms — a PDF render, an email, a thumbnail — does not belong in the request path. The fix is usually a single small worker; both CodeSky and your future self will thank you.
The script we run on every promotion
We keep a one-page checklist as part of every CodeSky → production handoff. It maps to those four areas, plus secrets rotation and a 30-minute load smoke. Total time: under three hours for a typical SaaS. The day-2 incident savings are an order of magnitude bigger.