Agent Plugin
Build Web Apps
A Codex plugin that combines frontend construction, browser verification, React, shadcn, Stripe, and Supabase practices.
What is Build Web Apps?
Build Web Apps is OpenAI's bundled web-development plugin for Codex. Instead of treating frontend work as a single prompt, it combines focused skills for implementation, runtime debugging, framework conventions, UI primitives, payments, and backend services. The package is best suited to end-to-end product work where the agent must both write the interface and verify that the resulting application behaves correctly.
Key capabilities
Full web workflow
Covers implementation, integration, and browser-level verification rather than code generation alone.
Composable expertise
Activates focused skills for React, shadcn, Stripe, or Supabase as the task requires.
Repository-aware
Works inside the current app and favors its established framework and design conventions.
Use cases
Ship a web feature
Implement a complete user flow and confirm it in a running browser.
Debug a frontend
Trace layout, interaction, or runtime issues with browser evidence.
Add product infrastructure
Integrate payments or Supabase-backed functionality without abandoning the existing app structure.
Included components
Skills
Frontend App Builder
Builds complete frontend experiences within an existing repository.
Frontend Testing and Debugging
Verifies browser behavior and diagnoses visual or runtime failures.
React Best Practices
Applies production React patterns during implementation and review.
shadcn Best Practices
Uses shadcn primitives without fighting the project's component system.
Stripe Best Practices
Guides payment-related implementation against Stripe's platform conventions.
Supabase Best Practices
Guides database and backend integration work using Supabase.
Installation scope
- Codex with workspace plugin access
- A local web project and its package manager
- Separate authorization for any external app or service used by the included skills