The founder of InboxFlow had built a working prototype. It handled email triage for small teams — routing messages, generating draft replies, and flagging high-priority items. It worked on his laptop. It crashed in production. He came to us with 18 days before a demo to investors.
Day 1–3: diagnosis
We spent the first three days doing nothing but auditing what existed. The code quality was higher than we expected — the AI coding tools had produced clean, readable component code. The problems were architectural: no error handling on API routes, environment variables hardcoded in source files, authentication that worked for single-user testing but would fail for multi-tenant use, and a database schema that would not support the access patterns the product needed.
Day 4–8: foundation repair
Before building anything new, we fixed the foundations. Proper environment variable management. A multi-tenant database schema with row-level security. Authentication through a proper provider rather than hand-rolled JWT handling. Error handling on every API route. This was not glamorous work, but it was the work that made production viable.
Day 9–14: feature completion
With the foundation solid, we used AI agents to build the remaining features: team management, billing integration, usage analytics, and the onboarding flow. The AI generated the implementation; our engineers reviewed it. Because the underlying architecture was now correct, each feature built on a stable base.
Day 15–18: launch preparation
Deployment configuration, SSL, CDN setup, monitoring and alerting, load testing, and the go-live checklist. InboxFlow went live on day 18. The investor demo happened on day 19. The product handled 400 signups in the first week without issues.
What made it work
The existing prototype was not wasted — it gave us a working UI and clear product direction. The diagnosis phase was not skipped — it gave us a clear picture of what needed to change. And the timeline was aggressive but not reckless: 18 days to production is achievable when the scope is defined and the team does not waffle on decisions.