Skill directory
Agent skills
Focused instruction packs that teach a coding agent one job well. Browse the catalog and use any of them inside a RiverX project.
18,175Skills
1,902Publishers
249Official
Test Scenarioowl-listener/designer-skillsWrite realistic usability task scenarios with success criteria and facilitation notes. Use when you have a study and need the tasks. For the surrounding study design, use `usability-test-plan` (design-research).01Theming Systemowl-listener/designer-skillsDesign theming architecture — brand variants, dark mode, and high-contrast — mapped through token layers. Use when one system must serve multiple themes. For a single palette use `color-system` (ui-design); for dark mode craft use `dark-mode-design` (ui-design).01Typography Scaleowl-listener/designer-skillsCreate a modular type scale with size, weight, and line-height relationships. Use when establishing typographic structure. For line length only use `readable-measure`; for judging type on an existing screen use `critique-typography` (visual-critique).01Usability Test Planowl-listener/designer-skillsDesign a usability study — research questions, methodology, participant criteria, metrics, and facilitation guide. Use when planning the study as a whole. For writing the task scenarios inside it, use `test-scenario` (prototyping-testing).01User Flow Diagramowl-listener/designer-skillsDiagram screen-level paths, decision points, and branch logic. Use when specifying how a feature is traversed. For the emotional end-to-end arc, use `journey-map` (design-research).01User Personaowl-listener/designer-skillsBuild research-grounded personas with goals, frustrations, and behavioural patterns. Use when decisions need a consistent user reference. For one session's emotional snapshot use `empathy-map`; for motivation framing use `jobs-to-be-done`.01UX Writingowl-listener/designer-skillsWrite interface copy — microcopy, error messages, empty states, and CTAs. Use when the words are the deliverable. For content structure and ownership, use `content-strategy` (ux-strategy).01Version Control Strategyowl-listener/designer-skillsDefine version control for design files, components, and libraries — branching, naming, and release. Use when file history is chaotic. For design system contribution rules, use `design-system-governance` (design-systems).01Visual Hierarchyowl-listener/designer-skillsEstablish hierarchy through size, weight, colour, spacing, and position so the eye lands in the intended order. Use when composing new work. For judging an existing screen, use `critique-visual-hierarchy` (visual-critique).01Von Restorff Effectowl-listener/designer-skillsApply the Von Restorff Effect — the element that differs from its neighbours is the one remembered. Use when a single action must dominate. For overall ordering rather than single-element emphasis, use `visual-hierarchy`.01Wireframe Specowl-listener/designer-skillsSpecify wireframe layout — content priority, component placement, and annotation. Use when defining structure before visual design. For grid mechanics, use `layout-grid` (ui-design).01Zeigarnik Effectowl-listener/designer-skillsApply the Zeigarnik Effect — incomplete tasks stay mentally active. Use when designing progress indicators, saved drafts, and return hooks. For the emotional shape of the ending, use `peak-end-rule`.01
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