Agent Skills
Instruction packs that give your AI agent know-how. Three different kinds — pick the right one below.
✦ Standalone skills2,933
Self-contained. Install one into any project and it works on its own — no other software needed.
🧰 Tool add-ons726
Come bundled with a specific tool and only work together with it — they teach your agent how to operate that tool.
youtube-thumbnail-design
★ 582by qu-skills
YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization. Covers safe zones, text placement, face expression psychology, and A/B testing. Use for: YouTube thumbnails, video cover images, click-through optimization. Triggers: youtube thumbnail, thumbnail design, video thumbnail, click through rate, ctr optimization, youtube cover, video cover image, thumbnail maker, thumbnail tips, youtube design, video preview image
youtube-thumbnail-design
★ 582by halt-catch-fire
YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization. Covers safe zones, text placement, face expression psychology, and A/B testing. Use for: YouTube thumbnails, video cover images, click-through optimization. Triggers: youtube thumbnail, thumbnail design, video thumbnail, click through rate, ctr optimization, youtube cover, video cover image, thumbnail maker, thumbnail tips, youtube design, video preview image
character-design-sheet
★ 582by halt-catch-fire
Character consistency across AI-generated images with reference sheets and LoRA techniques. Covers turnaround views, expression sheets, color palettes, and style consistency tricks. Use for: character design, game art, illustration, animation, comics, visual novels. Triggers: character design, character sheet, character consistency, character reference, turnaround sheet, expression sheet, character art, consistent character, character concept, reference sheet, character creation, oc design,...
web-design-guidelines
★ 208by vercel
Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my site…
frontend-design
★ 208by vercel
Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts,…
building-admin-dashboard-customizations
★ 195by medusajs
Custom UI extensions for Medusa Admin dashboard using the Admin SDK and Medusa UI components. Load this skill FIRST for any admin UI work (planning, implementation, exploration); MCP servers provide API reference only, not design patterns or data loading strategies CRITICAL: Always use Medusa JS SDK for all API requests (never regular fetch); separate display queries from modal queries and invalidate display data after mutations Implement widgets on existing pages or create custom UI routes;...
content-experimentation-best-practices
★ 160by sanity-io
Structured guidance for designing, executing, and analyzing content experiments to improve conversion and engagement. Covers hypothesis frameworks, metric selection, sample size calculation, and statistical significance testing across A/B and multivariate experiments Includes detailed resources on p-values, confidence intervals, power analysis, and Bayesian methods for interpreting results Provides CMS integration patterns for managing variants at the field level and connecting external...
architecting-solutions
★ 121by bitwarden
Tech lead perspective on architecture, system design, architecture reviews, blast radius assessment, trade-off analysis, and decision-making. Use when planning…
cross-critique
★ 116by warpdotdev
Run a second round on a contested question by circulating each subagent's independent proposal to the other authors and asking for structured pros and cons, then synthesize. Use this skill whenever you have multiple independent proposals or opinions on a contested decision — architecture tradeoffs, code review disagreements, design choices, competing root-cause theories — and want sharper analysis than you'd produce by synthesizing alone. Pairs naturally with the council and research skills;...
designer-tools
★ 99by webflow
Build and manage pages, elements, components, and styles in Webflow Designer. Use when adding sections, creating layouts, building elements, inspecting or…
frontend-design
★ 90by factory-ai
Practical tactics for designing and building frontend interfaces. This is about making things look good and work well, not about frameworks or tooling.