Evaluates model ability to build complete React applications with authentication, databases, and backend functionality from real-world user prompts. In addition to frontend agent behavior, the evaluation captures use of backend tools such as write_file, edit_file, batch_create_file, read_file, web_search, web_fetch, grep_search, deploy, bash, video_fetch, image_generation, image_fetch, propose_plan, supabase_create_table, supabase_insert, supabase_query, supabase_update, supabase_delete, supabase_auth_create_user, supabase_create_bucket, supabase_create_rls_policy