Methodology
State-handling completeness: a proposed benchmark axis for AI app builders (August 2026)
State-handling completeness is a proposed BuilderProof benchmark axis (August 2026) that scores how well an AI app builder generates the non-ideal runtime states of the apps it produces: loading, empty, and error states. It is a 20-point axis across five sub-criteria, measured reproducibly by giving all five commercial builders (v0, Lovable, Replit, Base44, Bolt.new) an identical fixed prompt and then inspecting the generated app under a throttled network, an empty account, and a forced request failure.
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