How to Plan an MVP After Validating Your Startup Idea

Define the single job

Write down the one job the MVP does end-to-end. Everything not required for that job is cut. If you cannot describe the job in a sentence, you have a product wishlist, not an MVP.

Pick the tech stack that lets you ship in weeks

For solo founders in 2026, that usually means a Next.js or TanStack Start frontend, a managed database with row-level security, an AI gateway for model calls, and a payment provider that handles compliance. Boring is fast.

Timeline: four weeks, not four months

Week 1: schema and auth. Week 2: core happy path. Week 3: payments and polish. Week 4: onboarding, docs, and launch. If the plan needs longer, cut scope, not weeks.

The one metric that matters

Pick one activation metric — the moment the user gets value — and instrument it before launch. Everything else is noise for the first 100 users.

Forge AI's MVP module produces the feature list, stack, schema, and timeline based on your validated idea.