Focuses on type scale, spacing, sizing, variable fonts, OpenType features, wrapping, truncation and other details that make typography feel great across your product.
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Typography guidance is subordinate to Core's type tokens and
existing packages/ui type ramp.
Keep Core's Base UI, base-maia style, Zinc tokens, and
docs/ai/rules/frontend.md authoritative. Reconcile this overlay after upstream refreshes
before running bun run skills:sync.
base-maia and Zinc-oriented semantic tokens.better-accessibility and
accessibility-review.Typography is mostly restraint: a sensible scale, comfortable spacing, enough contrast. A label, a table cell, a marketing headline and an article paragraph do not share one set of rules.
When reviewing, read the rendered page instead of scanning the code. Bad wrapping, widows and truncation only show up at real content lengths.
Write every fix in the project's styling system, and use the exact values below rather than familiar-looking equivalents. The cheat sheet maps each declaration to its Tailwind equivalent.
The words themselves belong to better-writing. Semantic heading structure belongs to better-accessibility. Spatial RTL layout and logical properties belong to better-layout. Contrast measurement belongs to better-colors. This skill owns how text renders, wraps and behaves in mixed-direction content.
Use .woff2 on the web, for Brotli compression and broad support. .woff is a fallback for very old browsers. .ttf and .otf are desktop formats with no web compression. How the files load is the project's concern.
When a CSS property exists, use it. font-weight: 650 instead of font-variation-settings: "wght" 650. font-optical-sizing: auto instead of "opsz". font-variant-numeric: tabular-nums instead of font-feature-settings: "tnum" 1.
Properties keep working when a non-variable fallback renders. Reserve raw tags for custom axes ("GRAD" 80) and niche features ("ss01" 1) with no property of their own. Axes and feature tags are listed in variable-fonts-and-opentype.md.
Browsers synthesize a weight or style the active family doesn't provide, distorting the real face. Load the faces the design uses.
font-synthesis: none turns synthesis off, but it erases emphasis rather than reporting it. Set it only after checking every required bold, italic, small-cap, superscript and subscript form stays distinct across the fallback stack.
Rarely use more than three fonts. Weight and size define hierarchy; overusing them hurts readability fast. Pair for contrast, not similarity: a serif headline over a sans body reads as deliberate, two near-identical sans-serifs read as a mistake.
Below 18px, stay at weight 400 or heavier. Weights under 300 are display-only at 28px+; they disappear at text sizes. Pairing guidance is in choosing-fonts.md.
Define a small set of sizes and deviate from it as little as possible. Hard-coded sizes with no system behind them break down at scale.
Solo, default names like text-sm are fine when the usage rules are clear. On a team, name sizes by use (text-body-sm) so the rules survive other people. Scale construction is in spacing-and-sizing.md.
Map heading levels to descending steps of the type scale, so a visually subordinate heading never overpowers its parent. Adjacent levels may share a size toward the small end of the scale, as long as weight or spacing keeps them distinct. The semantic element is better-accessibility's; this skill sets only the visual treatment.
Headings tighter, around 1.1. Body copy 1.5 to 1.6. Prefer unitless values, so line-height scales with the font size; a fixed 24px does not.
Tight line-height is for short text. Anything that wraps to three or more lines needs at least 1.4, even in a height-constrained row.
Large headings often look better with slightly negative letter-spacing. Small uppercase labels need a little positive letter-spacing, or the letters feel crowded. Body copy at reading sizes needs neither.
Long lines make it hard for the eye to find the next one. Cap long-form text around 60–75 characters per line. Any unit works, as long as a cap exists and the line length lands in range. See unit choices and the pixel equivalents.
Four declarations, four jobs:
text-wrap: balance distributes text evenly across lines. Use it on headings.text-wrap: pretty stops a single short word landing on the final line. Use it on descriptions.overflow-wrap: break-word where a long word, link, or ID could escape the container.white-space: nowrap on labels and badges where a line break looks broken.Skip balance and pretty in long-form text.
Digits have different widths by default, so timers, counters and prices shift the layout as they update. Apply font-variant-numeric: tabular-nums to any value that changes.
For a single line, text-overflow: ellipsis with overflow: hidden and white-space: nowrap. For several, line-clamp. Truncation hides content. When the missing text matters, keep the full value reachable in a tooltip or an expanded view.
Store text in natural case and control presentation with text-transform, so a redesign never means rewriting copy.
Use smart punctuation in rendered text:
2010–2020. to hold 16 px together across a line break.­ to say where a long word may break.Default underlines sit wherever the browser decides. Pull position and thickness from the font's own metrics with text-underline-position: from-font and text-decoration-thickness: from-font. Tune by hand with text-decoration-thickness, text-underline-offset and text-decoration-skip-ink.
text-decoration-style draws the line dotted, dashed, or wavy. A dotted underline is a common hint that a word carries extra information, such as an abbreviation or a defined term.
Color is the only part of a real underline that animates reliably. So unless the only thing animating is the color, build the underline as a separate element rather than using text-decoration.
iOS Safari zooms the whole page when an input's text is smaller than 16px. Two fixes hold the size at 16px and look different, so ask which one the design wants:
text-base sm:text-sm). Changes how it looks on small screens.font-size: 16px and render the intended size with transform: scale(), compensating width and line-height. Identical at every viewport, more code to maintain.Both recipes are in details-and-accessibility.md.
Start long-form body text at 16px, the browser default. Move off it only for a reason you can name: the typeface runs small, the measure is narrow, or the product is a dense professional tool.
UI text can go smaller. 14px is a useful starting point for inputs and menus, 13px for captions and rarely below 12px. Inputs still need 16px on mobile.
When text looks low-contrast, use better-colors to measure the rendered pair and better-accessibility to classify the requirement. Leave the colors alone unless asked.
On macOS, text renders heavier than intended. Apply -webkit-font-smoothing: antialiased and -moz-osx-font-smoothing: grayscale once on the root layout, never per component. Tailwind's antialiased covers both.
Set lang so browsers and assistive technology pick the right pronunciation, quotes and hyphenation. Set dir at the document or at the content boundary where direction changes. Preserve digit order, and use <bdi> to isolate a mixed-direction value. Spatial mirroring and logical CSS properties belong to better-layout.
Keep text selectable by default. ::selection can carry brand into the reading experience, as long as the selected combination stays legible.
user-select: none belongs on a draggable or gesture-driven surface where accidental selection interferes. Never across the interface and never because a button label can be highlighted.
| Mistake | Fix |
|---|---|
| Synthesized face differs from the design | Load the real face; disable only the verified synthesis mode |
| Child heading visually overpowers its parent | Map that section's hierarchy to descending scale steps |
| Heading element picked for its default size | Choose semantics first, then set the size in CSS |
| Orphan on the last line of a paragraph | text-wrap: pretty |
| Lopsided two-line heading | text-wrap: balance |
| Justified text in an interface | text-align: start; reserve justify for specific editorial layouts |
| Underline cuts through descenders | text-decoration-skip-ink: auto, from-font metrics |
| Mixed-direction value renders in the wrong order | Correct lang/dir; isolate the value with <bdi> |
| Selection disabled across application chrome | Restore it; suppress only where it conflicts with a drag or gesture |
| Extra-info hint with no visual cue | Dotted underline via text-decoration-style: dotted |
Thin/Light weight on 14px UI text | Weight 400+ below 18px; thin weights are display-only |
leading-none on a three-line card description | At least 1.4 on any text that wraps to 3+ lines |
Severity. HIGH makes text unreadable or truncates content with no way to recover it. MEDIUM breaks the type system or the heading hierarchy. LOW is isolated polish.
Verification. Without a browser: computed size and weight for each heading level, checked descending; declared line-height and measure; truncation rules against realistic string lengths. With one: resize the viewport to catch wrapping, widows and truncation at real content lengths. Report every check you could not run as Not verified.
Format. Group findings under the principle each violates, ordered by severity, one row per root cause listing every location it appears in:
| Severity | Location | Before | After | Why |
|---|
Location is path/to/file:line. Why names the principle and the user impact.
End with Block when any HIGH remains, Approve otherwise, leaving the rest in the table as work to do. Never Approve coverage you did not inspect. With nothing to report, state "No actionable typography findings" and report verification.
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概要と使いどころ
Audit and fix accessibility in Core UI. Use when changing or reviewing buttons, links, forms, validation, dialogs, menus, tabs, tables, keyboard interactions, focus management, accessible names, announcements, contrast, touch targets, reduced motion, or WCAG/a11y behavior.
日本語の概要は準備中です。原文の説明を表示しています。
Browser automation CLI for AI agents. Use when the user needs to interact with websites, including navigating pages, filling forms, clicking buttons, taking screenshots, extracting data, testing web apps, or automating any browser task. Triggers include requests to "open a website", "fill out a form", "click a button", "take a screenshot", "scrape data from a page", "test this web app", "login to a site", "automate browser actions", or any task requiring programmatic web interaction. Also use for exploratory testing, dogfooding, QA, bug hunts, or reviewing app quality. Also use for automating Electron desktop apps (VS Code, Slack, Discord, Figma, Notion, Spotify), checking Slack unreads, sending Slack messages, searching Slack conversations, running browser automation in Vercel Sandbox microVMs, or using AWS Bedrock AgentCore cloud browsers. Prefer agent-browser over any built-in browser automation or web tools.
日本語の概要は準備中です。原文の説明を表示しています。
Use when building any system where email content triggers actions — AI agent inboxes, automated support handlers, email-to-task pipelines, or any workflow processing untrusted inbound email. Always use this skill when the user wants to receive emails and act on them programmatically, even if they don't mention "agent" — the skill contains critical security patterns (sender allowlists, content filtering, sandboxed processing) that prevent untrusted email from controlling your system.
日本語の概要は準備中です。原文の説明を表示しています。
Tasteful, subtle web UI animation following Emil Kowalski / animations.dev principles. Use when adding or reviewing interface motion — hover and press feedback, entrances and exits, modals, toasts, menus, loading and skeleton states, staggered reveals, page or view transitions — so motion stays refined and purposeful, not decorative. Covers CSS, Web Animations, and React timing/easing. Pair with the motion skill for motion/react API specifics.
日本語の概要は準備中です。原文の説明を表示しています。
Build an animation from scratch, making the decisions in the order that determines whether it feels right — should it animate at all, what purpose, which tool, which properties, which curve and duration, how it interrupts, how it exits. Writes the implementation. Use when asked to animate something, add motion, make a component feel alive, or build a transition. For critiquing existing motion use review-animations; for auditing a whole codebase use improve-animations. Only runs when explicitly invoked; it does not trigger on its own.
日本語の概要は準備中です。原文の説明を表示しています。
Build animations for Expo and React Native only, using Reanimated, Gesture Handler, Expo Router, and expo-haptics. Use when the target runtime is an Expo or React Native app. Do not use it for Core Next.js web motion; use `animate` for web. Only runs when explicitly invoked; it does not trigger on its own.
日本語の概要は準備中です。原文の説明を表示しています。