Design & UX

> Apply ARIA roles, states, and properties correctly to enhance assistive technology support for custom widgets

> Voice and tone in UI writing — defining voice (constant) vs tone (contextual), formality calibration, and emotional register

> Tooltip and contextual help writing — when to use tooltips, what to put in them, and progressive disclosure patterns that educate without interrupting

> Search copy — placeholder text, zero-results messaging, autocomplete hints, search scope indicators, saved search patterns

> Loading state copy — progress transparency, expectation setting, and writing text that reduces perceived wait time and prevents users from abandoning

> Inclusive language in UI — gender-neutral, ability-neutral, culture-aware writing, avoiding idioms that exclude

> Form labels and helper text — label clarity, placeholder anti-patterns, required-field indication, and writing forms that users complete without confusion

> Data table copy — column headers, empty cells, truncation patterns, filter and sort labels, bulk action copy

> Confirmation dialogs — destructive action writing, consequence clarity, and specific button labels that make irreversibility unmistakable

> Master SVG optimization — automated minification with SVGO, inline versus external delivery trade-offs, SVG sprite sheet systems, accessibility patterns, rendering performance for complex vector graphics, and icon system architecture.

> Measure and optimize INP — the worst-case interaction latency across the entire page session — by decomposing each interaction into input delay, processing time, and presentation delay, then targeting each phase with yielding, scheduling, and rendering strategies.

> Master web font loading optimization — font-display strategies for FOIT/FOUT control, Unicode range subsetting, variable fonts for multi-weight reduction, WOFF2 compression, preloading critical fonts, self-hosting versus CDN delivery, and the Font Loading API for programmatic control.

> Measure and prevent unexpected layout shifts — elements visually moving after being rendered — by reserving space for dynamic content, handling font loading, setting explicit dimensions, and understanding the CLS scoring formula.

> Prevent cascading failures with circuit breaker, half-open state, and fallback logic.

> Aesthetic direction workflow. Capture design intent, generate DESIGN.md with anti-patterns and platform notes, review components against aesthetic guidelines, and enforce design constraints at configurable strictness levels.

> Token-bound web component generation. Scaffold from design tokens and aesthetic intent, implement with Tailwind/CSS and React/Vue/Svelte patterns, and verify every value references the token set — no hardcoded colors, fonts, or spacing.

> Token-first design management. Discover existing design patterns, define intent through curated palettes and typography, generate W3C DTCG tokens, and validate every color pair for WCAG compliance.

> Token-bound mobile component generation. Scaffold from design tokens and aesthetic intent, implement with React Native, SwiftUI, Flutter, or Compose patterns following platform-specific design rules, and verify every value references the token set with native convention compliance.

> LLM-judgment-based design ceiling-raiser. Three branchable phases — CRITIQUE finds what's mediocre, POLISH applies high-craft moves, BENCHMARK scores against curated exemplars. The ceiling counterpart to harness-design (declared-intent enforcement, rule-based) and the design-pipeline floor audits.

> Clone objects using prototype registry and structured clone for deep copy scenarios.

> Detect design-system drift — hardcoded values where tokens exist, and raw HTML primitives where registered components exist. The rule-based floor of design-pipeline (detect half). Reports findings; never modifies source. Pairs with a separate align-design-system fixer skill (deferred to a sibling sub-project).

> Space as a design element — macro vs. micro whitespace, breathing room, density control, and whitespace as a signal of quality and luxury

> Directing attention through size, color, contrast, position, isolation, and motion — the system that tells the eye where to go first, second, and third

> Anatomy of type — x-height, ascenders, descenders, counters, serifs, stroke contrast, optical sizing, and how anatomy affects readability