App Archetypes

Archetypes

tool-only

Use when:

• The user does not need an in-ChatGPT UI
• The task is mainly search, fetch, retrieval, or background actions

Default shape:

• MCP server only

Best starting point:

• Official docs and MCP server examples

Validation emphasis:

• /mcp route works
• tool schemas and annotations are correct
• no unnecessary UI resource is registered
• if the app is connector-like or sync-oriented, search and fetch should be the default read-only tools

vanilla-widget

Use when:

• The user wants a small demo, workshop starter, or simple inline widget
• A single HTML widget is enough
• The user wants the fastest path to a working repo

Default shape:

• Root-level server plus public/ widget assets

Best starting point:

• Apps SDK quickstart first
• Local fallback scaffold if the quickstart is not a good fit

Validation emphasis:

• bridge initialization
• ui/notifications/tool-result
• tools/call only when the widget is interactive

react-widget

Use when:

• The user wants a polished UI
• The UI is clearly component-based
• The user mentions React, TypeScript frontend tooling, or richer design requirements

Default shape:

• Split server/ + web/ layout when the example already uses it

Best starting point:

• Official OpenAI examples

Validation emphasis:

• build output is wired into the server correctly
• bundle references resolve
• widget renders from structuredContent

interactive-decoupled

Use when:

• The app has repeated user interaction
• The widget should stay mounted while tools are called repeatedly
• The app is a board, map, editor, game, dashboard, or other stateful experience

Default shape:

• Split server/ + web/
• data tools plus render tools

Best starting point:

• Official OpenAI examples plus references/interactive-state-sync-patterns.md

Validation emphasis:

• tool retries are safe
• widget does not remount unnecessarily
• state sync is intentional
• UI tool calls work independently of model reruns

submission-ready

Use when:

• The user asks for public launch, review readiness, or directory submission

Default shape:

• Smallest viable repo that still includes deployment and review requirements

Best starting point:

• Closest official example that matches the requested stack

Validation emphasis:

• _meta.ui.domain
• accurate CSP
• auth and review-safe flows
• submission prerequisites and artifacts

Selection Heuristic

• If the prompt does not mention a UI, choose tool-only.
• If the prompt is about a knowledge source, sync app, connector-like integration, or deep research, strongly prefer tool-only plus the standard search and fetch tools unless the user clearly needs a widget.
• If the prompt asks for a simple demo or starter, choose vanilla-widget.
• If the prompt asks for a polished UI or React, choose react-widget.
• If the prompt implies long-lived client state or repeated interaction, choose interactive-decoupled.
• Only choose submission-ready when the user explicitly asks for launch or review-readiness work.