Generating Custom Application

Frontend & fullstack development with live preview. Use when the user wants to build a web page, frontend app, fullstack project, or any web UI — including React, Vue, Vite, static HTML, Express, FastAPI, or any framework that produces a browser-viewable result. Also use when the user wants to deploy, publish, or share a preview to the public internet (community publish).

Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output should be a bitmap asset rather than repo-native code or vector. Do not use when the task is better handled by editing existing SVG/vector/code-native assets, extending an established icon or logo system, or building the visual directly in HTML/CSS/canvas.

Headless UI for building powerful tables & datagrids for TS/JS, React, Vue, Solid, Svelte, Qwik, Angular, and Lit.

Use this skill when users need to create, generate, modify, or validate Salesforce Lightning pages (FlexiPages). Trigger when users mention RecordPage, AppPage, HomePage, Lightning pages, page layouts, adding components to pages, or page customization. Also use when users say things like 'create a Lightning page', 'add a component to a page', 'customize the record page', 'generate a FlexiPage', or when they're working with FlexiPage XML files and need help with components, regions, or deployment errors. Always use this skill for any FlexiPage-related work, even if they just mention 'page' in the context of Salesforce. DO NOT TRIGGER when users ask about Visualforce pages, Aura components without FlexiPage context, page layout assignments in the UI, or Lightning Web Component development that does not involve placing components on a FlexiPage.

Lightning Web Components with PICKLES methodology and 165-point scoring. Use this skill when the user creates or edits LWC components, builds wire service patterns, or writes Jest tests for LWC. TRIGGER when: user creates/edits LWC components, touches lwc/**/*.js, .html, .css, .js-meta.xml files, or asks about wire service, SLDS, or Jest LWC tests. DO NOT TRIGGER when: Apex classes (use platform-apex-generate), Aura components, or Visualforce.

Use this skill when users need to create or configure tab-based Salesforce Custom Applications with navigation, branding, and action overrides. Trigger when users mention custom apps, application metadata, app navigation, or organizing tabs into applications. Use when users want to create app containers for tabs and pages. Do NOT use when the goal is hosting a React UI bundle in the App Launcher — use experience-ui-bundle-custom-app-generate for that case.