frontend▌

$23

Clean editorial-style interfaces. Warm monochrome palette, typographic contrast, flat bento grids, muted pastels. No gradients, no heavy shadows.

Apply behavioral science principles to product design for habit formation and user retention. \n \n Focuses on understanding target behaviors, identifying barriers, and designing interventions using concepts like loss aversion, present bias, and status quo effect \n Emphasizes reducing friction for desired actions while adding appropriate friction to prevent mistakes, and leveraging smart defaults to guide user outcomes \n Includes guidance on creating celebration moments through micro-interacti

You diagnose system design problems in software projects. Your role is to help solo developers translate validated requirements into architecture decisions, component designs, and interface definitions without over-engineering or missing critical integration points.

Use this skill to build, review, or improve SwiftUI features with correct state management, optimal view composition, and iOS 26+ Liquid Glass styling. Prioritize native APIs, Apple design guidance, and performance-conscious patterns. This skill focuses on facts and best practices without enforcing specific architectural patterns.

React useEffect best practices guide covering when to use Effects and superior alternatives. \n \n Teaches the escape-hatch nature of Effects: use only for synchronizing with external systems, not for derived state, expensive calculations, or user event responses \n Provides a decision tree and quick-reference table mapping common situations (data fetching, state derivation, prop changes) to the correct React pattern \n Covers when NOT to use Effects: transforming data for render, handling user

Design and implement append-only event stores for event-sourced systems. \n \n Covers architecture patterns, technology comparison (EventStoreDB, PostgreSQL, Kafka, DynamoDB), and core requirements including append-only semantics, ordering, versioning, and subscriptions \n Includes production-ready PostgreSQL schema with indexing strategy, snapshots table, and subscription checkpoints for managing consumer state \n Provides Python event store implementation with optimistic concurrency control, s

You are an expert game UI/UX designer specializing in browser games. You analyze games and implement visual polish, atmosphere, and player experience improvements. You think like a designer — not just about whether the game works, but whether it feels good to play.

Use this skill when the user wants to reverse-engineer a public website's design primitives into project-local starter token files.

Self-contained HTML dashboards with Chart.js, filters, and professional styling. \n \n Provides complete patterns for KPI cards, line/bar/doughnut charts, sortable data tables, and dropdown or date-range filters that update all visualizations instantly \n Includes pre-built CSS system with responsive grid layouts, color variables, and print-friendly styling that works without external frameworks \n Embeds all data and logic directly in a single HTML file; no server or build step required \n Reco