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Found 1,372 Skills
Web typography principles based on "On Web Typography" by Jason Santa Maria (A Book Apart, 2014). Use when selecting typefaces, setting body text, creating type hierarchies, pairing fonts, or implementing typography in CSS. Triggers on requests for font selection, readable text, typographic hierarchy, font pairing, or "making text look better."
Universal React UI framework for web and native. Use when building cross-platform apps with Tamagui, creating styled components with `styled()`, configuring design tokens/themes, using Tamagui UI components, or working with animations. Triggers: "tamagui", "styled()", "$token", "XStack/YStack", "useTheme", "@tamagui/*" imports, "createStyledContext", "variants".
A/B test subject line variations using proven copywriting frameworks. Predict open rates based on historical performance.
Build UIs with shadcn/ui components. Covers CLI commands, component installation, theming with CSS variables, OKLCH colors, and customization patterns. Triggers on shadcn, shadcn-ui, add component, or theming questions.
Accessibility testing for web applications using Playwright (@playwright/test) with TypeScript and axe-core. Use when asked to write, run, or debug automated accessibility checks, keyboard navigation tests, focus management, ARIA/semantic validations, screen reader compatibility, or WCAG 2.1 Level AA compliance testing. Covers axe-core integration, POUR principles (perceivable, operable, understandable, robust), color contrast, form labels, landmarks, and accessible names.
Expert blueprint for platformer games including precision movement (coyote time, jump buffering, variable jump height), game feel polish (squash/stretch, particle trails, camera shake), level design principles (difficulty curves, checkpoint placement), collectible systems (progression rewards), and accessibility options (assist mode, remappable controls). Based on Celeste/Hollow Knight design research. Trigger keywords: platformer, coyote_time, jump_buffer, game_feel, level_design, precision_movement.
Update, archive, and delete LaunchDarkly AI Configs and their variations. Use when you need to modify config properties, change model parameters, update instructions or messages, archive unused configs, or permanently remove them.
Analyzes code for WCAG 1.4.1 Use of Color compliance. Identifies where color is used as the only means of conveying information and recommends additional visual indicators like text, icons, patterns, or ARIA attributes.
Design-to-code pipeline: extract copy from URLs, extract design tokens from images, then build React components or HTML preview variants. Use when: extracting content from websites, extracting design systems, generating frontend code, previewing design variants, sending to Figma via MCP. Triggers on "extract copy", "extract design", "build frontend", "generate variants", "export design", "send to Figma".
Invariant manifold tangent to center eigenspace
Use when a program crashes, a test fails, or code produces wrong results and reading the source isn't enough to see why. Lets you pause execution at any line and inspect the actual runtime state, variable values, types, call stacks, to find what went wrong.
Translate PRD intent, roadmap asks, or product discussions into an implementation-ready capability plan that exposes constraints, invariants, interfaces, and unresolved decisions before multi-service work starts. Use when the user needs an ECC-native PRD-to-SRS lane instead of vague planning prose.