Once a vibe-coded prototype gets traction, you face one decision: ship it as-is, or harden it first. Here is what each path really costs.
Concern
Ship vibe-coded as-is
Harden first
Auth and accessOften weak or faked, easy to bypass.
Real auth, proper roles and sessions.
Data integrityNo constraints, data drifts and corrupts.
Validated, consistent, recoverable.
SecurityExposed keys, trusting inputs, open holes.
Secrets managed, inputs validated, basics covered.
Under loadFine for the demo, unknown beyond it.
Tested against realistic concurrency.
Cost if it breaksData loss, breach, lost customer trust.
Predictable upfront work, fewer surprises.
Speed to real launchFeels fast, then stalls in incidents.
A short hardening sprint, then steady.