A UI pattern library built for coding agents. 40 patterns, each shipping a copy-paste prompt that rebuilds it inside your own codebase — plus a live preview and the source behind it.
1. User interfaces (Computer systems). 2. Prompts. 3. CSS. I. Title.
The pattern running live in an isolated frame, in whichever theme you are reading in.
Its markup, styles and behaviour, plus a single runnable file carrying its own palette.
A written spec that rebuilds the pattern from scratch — including why each decision is the way it is. Paste it into Claude Code, Cursor, or any coding agent.
The prompts are the point. Each one is written to survive being handed to an agent with no other context: it names the surfaces the pattern belongs on, spells out the constraint that makes it work, and calls out the failure it exists to prevent. Nothing here is a dependency you install.
40 patterns
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Data display · Added 2026-08-11
Rows of resources against a fixed time window, where each block is sized by its overlap with the window rather than by its own duration.
1. schedule. 2. timeline. 3. grid. 4. flexbox.
Data display · Added 2026-08-11
Places a raw figure on a scale of external benchmarks instead of printing it plain.
1. progress. 2. benchmarks. 3. css-only. 4. data-viz.
Data display · Added 2026-08-11
A two-axis lookup table with both headers sticky, hover lighting the full row and column at once, and a durable click-to-pin selection for touch.
1. table. 2. matrix. 3. sticky. 4. accessibility.
Data display · Added 2026-08-11
Shortens a long path by dropping whole segments from the left, because the tail is what tells two paths apart.
1. truncation. 2. paths. 3. text-overflow. 4. breadcrumbs.
Data display · Updated 2026-08-21
A sequence compressed into a row of small marks whose shape carries the state.
1. stepper. 2. sparkline. 3. series. 4. truncation.
Data display · Added 2026-08-21
A month-by-month volume timeline built from plain divs where every aggregate row links to the filtered view that produced it.
1. timeline. 2. drill-down. 3. css-only. 4. data-viz.
Data display · Added 2026-08-21
A vertical potion-vial meter whose liquid fills a wide bulb first and then rises into a narrow neck — all CSS, no images.
1. meter. 2. skeuomorphic. 3. css-only. 4. reduced-motion.
Data display · Added 2026-09-12
Progress for work with several possible endings, drawn as a census rather than a fraction.
1. progress. 2. stacked-bar. 3. batch. 4. legend.
Data display · Added 2026-09-12
A computed figure shown with the audit trail behind it — the number is the product and the derivation is the receipt.
1. explainability. 2. calculator. 3. disclosure. 4. formula.
Data display · Updated 2026-09-12
A dry run shown as a before-and-after tree with counts now, after, and the difference.
1. dry-run. 2. diff. 3. tree. 4. preview.
Data display · Added 2026-09-12
One card shell many independent sources render through, where the shell does the capping.
1. dashboard. 2. widgets. 3. cards. 4. empty-state.
Layout · Updated 2026-08-11
Where a record stands for a physical thing, the card is drawn as that thing — nine variations in pure gradients.
1. cards. 2. css-only. 3. gradients. 4. variations.
Layout · Added 2026-08-11
A container with no artwork draws one from up to four member tiles, grid tracks following tile count.
1. css-grid. 2. css-only. 3. no-assets. 4. cards.
Layout · Updated 2026-08-11
Text printed over unreviewed artwork, scrimmed to an alpha that can be written down rather than guessed.
1. layout. 2. css-only. 3. gradients. 4. contrast.
Layout · Updated 2026-08-21
Stat tiles joined by hairlines that are grid gap, not borders.
1. stats. 2. css-grid. 3. css-only. 4. hairline.
Layout · Added 2026-08-21
Conversation bubbles with a speaker-colored spine and a fixed metadata gutter.
1. conversation. 2. gutter. 3. status-roles. 4. contrast.
Layout · Added 2026-08-21
Pinned paper notes on a cork board where every texture is layered CSS gradients.
1. skeuomorphic. 2. gradients. 3. no-assets. 4. cards.
Layout · Updated 2026-09-12
Markers at percentage coordinates over a fixed-aspect picture, turning into a list when too narrow.
1. hotspots. 2. pointer-events. 3. aspect-ratio. 4. container-query.
Layout · Added 2026-09-12
Inline drawings for empty surfaces stroked in the inherited text colour.
1. empty-state. 2. svg. 3. currentcolor. 4. illustration.
Layout · Added 2026-09-12
Cards flowing down columns instead of across rows, with the reading-order cost stated plainly.
1. masonry. 2. columns. 3. break-inside. 4. reading-order.
Interaction · Added 2026-08-11
An inset shadow shown only on the edge that has more content behind it.
1. scrolling. 2. affordance. 3. lists. 4. overflow.
Interaction · Added 2026-08-11
A one-card-at-a-time review queue whose batch is snapshotted at mount.
1. queue. 2. review-flow. 3. animation. 4. keyboard.
Interaction · Updated 2026-08-11
Per-card controls over a fully-linked card without nesting interactive elements in the anchor.
1. cards. 2. accessibility. 3. keyboard. 4. focus-within.
Interaction · Updated 2026-08-11
One canvas, a registry of draw modes, each mode owning its entire frame.
1. canvas. 2. visualization. 3. registry. 4. animation.
Interaction · Updated 2026-08-21
A dense grid of state cells that is one tab stop with arrow-key navigation.
1. keyboard. 2. roving-tabindex. 3. accessibility. 4. states.
Interaction · Added 2026-08-21
Sticky vertical rail on wide screens, wrapping tab row on narrow ones, from the same markup.
1. navigation. 2. toc. 3. responsive. 4. aria-current.
Interaction · Added 2026-08-21
Buttons on a solid ledge shadow that travel down onto it when pressed.
1. buttons. 2. skeuomorphic. 3. press. 4. tokens.
Interaction · Updated 2026-09-12
A blocked control stays focusable, carries the reason as text, and refuses in its handler.
1. aria-disabled. 2. disabled. 3. preconditions. 4. keyboard.
Interaction · Updated 2026-09-12
One card for every state a background job passes through.
1. progress. 2. polling. 3. background-job. 4. indeterminate.
Interaction · Added 2026-09-12
FLIP-style motion between two rendered states when the old DOM is already gone.
1. animation. 2. transitions. 3. reflow. 4. reduced-motion.
Interaction · Updated 2026-09-12
Assignment that starts at the destination slot, then narrows the catalogue.
1. assignment. 2. picker. 3. aria-pressed. 4. filtering.
Forms · Added 2026-08-28
A destructive action with no confirm dialog, held behind a toast and committed when it expires.
1. undo. 2. toast. 3. destructive. 4. aria-live.
Forms · Added 2026-09-28
A confirm dialog that names everything a delete cascades and blocks dismissal while it runs.
1. confirm-dialog. 2. destructive. 3. cascade. 4. dialog-element.
Forms · Updated 2026-08-28
A bar that exists only while something is selected, states the count in words, caps at five actions.
1. selection. 2. bulk-actions. 3. toolbar. 4. checkbox.
Forms · Added 2026-09-12
The three empty states a list actually has, written as three different screens.
1. empty-state. 2. filter. 3. search. 4. zero-results.
Forms · Added 2026-09-12
A search box that echoes back how it read the text as removable chips.
1. search. 2. query-syntax. 3. chips. 4. facets.
Forms · Added 2026-09-12
One grouped select whose value carries both the kind and the id.
1. select. 2. optgroup. 3. polymorphic. 4. forms.
Color · Updated 2026-08-11
Colors solved against the page's own ground token so they invert correctly between themes.
1. color. 2. contrast. 3. color-mix. 4. accessibility.
Color · Updated 2026-08-21
One custom property carries the hue; border, fill, spine and dot derive from it.
1. color. 2. color-mix. 3. custom-properties. 4. theming.
Color · Updated 2026-09-12
Opaque controls, a gradient-darkened fill, and a two-tone focus ring on a surface whose colour arrives from outside.
1. contrast. 2. brand-color. 3. focus-ring. 4. opacity.