80% wall
The 80% wall is the point in an AI-assisted build where the app looks done but breaks once real complexity like auth, payments, or multi-user state enters.
Glossary
Plain-language definitions of the terms behind AI-assisted app building and pre-build planning.
Context rot
Context rot is when an AI coding agent's context fills with contradictory instructions, errors, and expired rules, so it hallucinates instead of executing.
Spec-driven development
Spec-driven development (SDD) is a planning method where you write a full architecture spec before generating any code with an AI coding agent.