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Interface apps inside ChatGPT and Claude v1.0.0

Use this resource to design an interface rendered inside ChatGPT or Claude through MCP or the Apps SDK

New

  • 365 downloads
  • 180 likes
  • 221 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install chat-app-ui-sdk-guide

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent helps you build or review an app that renders in chat, covering its MCP server, data bridge and security policy. It addresses display modes, widget state and distribution constraints. You get an interface that works and reads well on both platforms.

Mostly picked by

Updated November 2, 2026

Card for the “Interface apps inside ChatGPT and Claude” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • references/: cards on the data bridge and message security
  • references/: cards on design, contrast and actions

Good fit for

  • You are building a ChatGPT widget that shows data from your service
  • You want one MCP interface that also runs in Claude

Not for

    Tags

    • mcp
    • chatgpt
    • claude
    • interface
    • sdk

    About

    You say

    “Build an order-tracking widget shown in chat, with MCP tool calls and origin checks on incoming messages.”

    Card for the “Interface apps inside ChatGPT and Claude” skill

    Skill published by pproenca under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to design an interface rendered inside ChatGPT or Claude through MCP or the Apps SDK
    3. Review and adjust the result

    Content preview

    Files

    • AGENTS.md10.8 KB
    • assets/templates/_template.md1.6 KB
    • LICENSE1.1 KB
    • metadata.json1.9 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/_sections.md4.2 KB
    • references/bridge-call-tools-app-visibility.md1.5 KB
    • references/bridge-followup-vs-silent-call.md1.4 KB
    • references/bridge-handle-all-mcpui-actions.md1.4 KB
    • references/bridge-render-from-notifications.md1.5 KB
    • references/bridge-use-host-apis.md1.4 KB
    • references/bridge-validate-postmessage-origin.md1.4 KB
    • references/design-inherit-native-typography.md1.1 KB
    • references/design-limit-actions-hierarchy.md1.1 KB
    • references/design-meet-wcag-contrast.md1.1 KB
    • references/design-render-loading-empty-error.md1.2 KB
    • references/design-respect-reduced-motion.md1 KB
    • references/design-restrain-brand-color.md1.2 KB
    • references/display-avoid-nested-scroll.md1.1 KB
    • references/display-pick-the-right-mode.md1.3 KB
    • references/display-report-intrinsic-height.md1.3 KB
    • references/display-request-mode-with-fallback.md1.3 KB
    • references/display-respect-theme.md1.3 KB
    • references/display-responsive-breakpoints.md1.2 KB
    • references/dist-build-on-mcp-apps-standard.md1.3 KB
    • references/dist-degrade-without-ui.md1.2 KB
    • references/dist-feature-detect-host-apis.md1.1 KB
    • references/dist-provide-submission-metadata.md1.2 KB
    • references/sec-avoid-frame-domains.md1.4 KB
    • references/sec-declare-csp-allowlist.md1.3 KB
    • references/sec-enforce-server-side-auth.md1.1 KB
    • references/sec-minimize-restricted-data.md1.2 KB
    • references/sec-no-secrets-in-payloads.md1.3 KB
    • references/sec-signal-oauth-challenge.md1.3 KB
    • references/state-keep-state-small.md1 KB
    • references/state-no-secrets-in-state.md1.1 KB
    • references/state-persist-widget-state.md1.3 KB
    • references/state-separate-three-stores.md1.7 KB
    • references/state-update-model-context.md1.3 KB
    • references/tool-feed-widget-in-response.md1.5 KB
    • references/tool-honest-descriptions.md1.4 KB
    • references/tool-minimal-scoped-inputs.md1.4 KB
    • references/tool-output-schema-validation.md1.6 KB
    • references/tool-safety-annotations.md1.4 KB
    • references/tool-specific-verb-names.md1.3 KB
    • references/tool-structured-content-contract.md1.8 KB
    • references/wire-inline-self-contained-bundle.md1.5 KB
    • references/wire-mcp-app-mimetype.md1.2 KB
    • references/wire-resource-uri-link.md1.5 KB
    • references/wire-set-ui-domain.md1.3 KB
    • references/wire-ui-scheme-and-handler.md1.3 KB
    • references/wire-version-uri-cache-key.md1.2 KB
    • SKILL.md9.7 KB

    Origin and licence

    Listed unmodified

    Author
    pproenca
    Source
    github.com/pproenca/dot-skills/tree/cf93c57cac89d6fc3e4194686000411567f5caf3/skills/.experimental/chat-apps-ui-sdk
    Licence
    MIT

    Notice

    « chat-apps-ui-sdk » (pproenca, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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