Allow Select and Combobox triggers to compose directly with Toolbar.Button and Toolbar.Input through their render props, adding grouped styling and arrow-key focus management while preserving regular Select.* and Combobox.* APIs.

Deprecate Toolbar's configurable size prop and size metadata exports. They remain functional for compatibility; omitting size continues to use the base size.

Forward link-specific props in Tabs and Sidebar so link-rendered tabs can opt out of native button semantics, and Sidebar link buttons preserve attributes like aria-current.

Expose all positioner props on Combobox.Content (anchor, positionMethod, collisionAvoidance, collisionBoundary, collisionPadding, sticky, disableAnchorTracking).

Populate InputArea props in component registry so the docs API reference table renders correctly

Fix Sidebar peeking state during SlidingViews transitions.

Fix Tabs overflow controls when tabs are removed and the remaining tabs fit.

Remove the elevated chip styling from Tabs overflow scroll controls.

Constrain Tabs overflow controls to segmented tabs and focus the caret target.

Update the default collapsible trigger and panel styling.

Collapsible.DefaultPanel now uses an inner content wrapper so the outer panel can animate height smoothly while clipping overflow during the transition. Consumers applying custom layout or spacing classes directly to DefaultPanel may need to move those styles to their content, or use Collapsible.Panel for a fully custom layout.

Fix initCatalog so it actually loads the validation schemas.

Previously it triggered a synchronous validation whose "schemas not loaded" error was swallowed, so await initCatalog(catalog) could resolve while hasComponent, componentNames, and the other synchronous catalog APIs still reported no components. It now awaits loadSchemas() directly.

A failed schema load is also no longer cached: retrying initCatalog (or loadSchemas) after a transient failure now re-attempts the import instead of returning the stale rejection.

Fix Shiki highlighter lifecycle in ShikiProvider and CodeHighlighted.

ShikiProvider no longer re-creates the highlighter when a parent rerender passes an equivalent inline languages array — initialization is keyed on the normalized language set. Highlighters are now disposed on unmount and when the engine or language set changes, instead of leaking. CodeHighlighted memoizes the highlighted HTML so unrelated rerenders (such as copy-button state changes) no longer re-highlight unchanged code, and initialization errors are logged once instead of on every render. Reinitializing after a failed initialization now clears the stale error state instead of showing it during the retry.

Reset the Tabs overflow control background so host button styles do not show through the scrim gradient.

Improves Banner contrast and CTA colors, adds compact sizing, and keeps components that consume the updated status tokens visually balanced.

• Updated status tokens to improve contrast between Banner backgrounds, text, and CTAs.
• Rebalanced Badge status tints, Toast backgrounds, and Command Palette search highlights to correspond with the updated tokens.
• Added a new Banner.Action CTA compound that builds on Button with banner-specific accent styling. It supports primary (filled), secondary (accent-hued outline on a transparent background), and ghost variants.
• Added a size prop to Banner ("base" | "sm"); the compact "sm" size suits dialogs and other tight spaces and sets its Banner.Action children to the xs size.

Improve chart loading states with a static, reduced-motion-aware TimeseriesChart skeleton (line and bar variants matching type) and a new loading prop for ChartLegend.SmallItem and ChartLegend.LargeItem.

Add a disabled prop to LinkButton. When disabled, it renders a real disabled <button> (dropping anchor-only attributes and event handlers) and supports title tooltips explaining why the action is unavailable.

Also removes stale Storybook references from the README and drops .stories.tsx generation from the component scaffolder, since Storybook is no longer set up in this repo.

LinkButton now wraps in a Kumo Tooltip when a title is provided, matching Button's behavior. Previously an enabled LinkButton only set a native title attribute; it now surfaces the same styled tooltip on hover and focus.

Add fullScreenOnMobile prop to Sidebar. When set, the mobile navigation sheet expands to the full viewport instead of leaving a sliver of the page visible, giving nav items comfortable touch targets. The backdrop is suppressed and the divider border dropped, since neither has anything to separate. Defaults to false.

Also adds Sidebar.Close, a ghost button that dismisses the mobile sheet. It is intended for Sidebar.Header in full-screen mobile layouts where the backdrop is hidden and there is no adjacent page content to tap.

Also fixes Breadcrumbs.Link shrinking alongside the current crumb. Flexbox distributed truncation across every crumb, turning the trail into unreadable stubs; ancestors now hold their width so only the current page truncates.

Add Sidebar.Loading, a nav loading skeleton so apps stop hand-rolling their own. It renders nav-item-shaped placeholder rows (icon + label) grouped like the real nav, composed from SkeletonLine and matching the Sidebar.MenuButton box model so there's no layout shift when the real nav swaps in. Collapse-aware (icon squares only when collapsed) and exposes role="status" with a configurable label.

Add useTableOfContentsActiveId hook for TableOfContents scroll tracking.

The TableOfContents component is presentational, so consumers had to wire up their own scroll-position tracking. This adds a shared hook: pass the section ids (in document order) and it returns the active section id plus a selectSection action for click handling.

const { activeId, selectSection } = useTableOfContentsActiveId({
  ids: headings.map((h) => h.slug),
  offset: HEADER_HEIGHT,
});

• Highlights the topmost section actually in view (via IntersectionObserver), offset by an optional fixed-header offset; supports custom scroll containers via root.
• Handles location.hash deep links on load and hashchange automatically (opt out with trackHash: false).
• selectSection pins a clicked section until scrolling settles, so short sections stay highlighted after a jump. Works on browsers without scrollend support.
• SSR-safe: all DOM access happens in effects, so it renders under Astro/Next SSR (activeId is null on the server).

The docs site "On this page" table of contents now consumes this hook instead of its own bespoke observer.

Ship unminified dist output without sourcemaps or declaration maps

Consumers' bundlers minify (and tree-shake) the library code anyway, so pre-minifying only obscured the shipped modules, and the declaration maps pointed at source files that aren't published. The package shrinks from ~13.9 MB to ~6.5 MB unpacked, and the code in node_modules is now readable. No API or behavior changes; final application bundle sizes are effectively unchanged.

Use a string or numeric Button title as the fallback accessible label when the button has no text children.

Bump Prettier 3.6.2 → 3.9.5 and reformat (Prettier changed e.g. interface heritage-clause wrapping). No functional changes.

Prevent TimeseriesChart tooltips from following the cursor outside the chart after a browser context menu interaction.

ClipboardText: keep the check icon until the last copy click settles, and bump the anchored "Copied" toast (without stacking) when the button is pressed again while it's open.

Render Kumo Link actions inline in compact Banners while keeping CTA actions trailing.

Fix purple badge token fallback colors to use purple OKLCH values.

Add a lint rule that verifies custom components used with Flow.Node's render prop forward refs and spread received props.

Keep TimeseriesChart brush-to-zoom active after replacing ECharts options.

Remove the subtle shadow-xs drop shadow from InputGroup Root and from nested InputGroup.Button, so the component matches the flat appearance of the standalone Input and other form controls (previously non-ghost button variants still had the base Button's shadow-xs).

Bundle the library with vp pack (tsdown) instead of Vite lib mode; declarations are now bundled per entry and export types paths follow the import paths

Use muted chart colors for timeseries axes and horizontal gridlines.

One-time repo-wide format with the repo's own Prettier 3.6.2 (formatting was never enforced; drift accumulated). No functional changes.

Set default text-base and text-lg line heights to 1.5.

Remove inert Tailwind classes surfaced by class sorting: ring alongside ring-2 (overridden — later stylesheet rule wins) and bare outline in three places (no such utility in Tailwind v4; outline-1 already applies the default solid style). No visual changes.

Split Base UI across fine-grained chunks instead of one vendor-base-ui chunk

Components now pull in only the Base UI modules they actually use, improving consumer tree-shaking: a single-Button app bundle drops from ~173 KB to ~129 KB minified (~57 KB to ~44 KB gzipped) compared to 2.8.0.

Add clearer edge affordances when Tabs overflow horizontally.

Show Button title tooltips when the button is disabled or loading.

Fix command palette match highlight contrast in dark mode.

Normalize Tailwind class strings via Oxfmt class sorting (sortTailwindcss, canonical Tailwind order, duplicates removed). No functional changes.

Migrate the toolchain to Vite+ (vp): the library now builds with Vite 8 on Rolldown, tests run through vp test (Vitest), and linting/formatting run through vp lint (Oxlint) / vp fmt (Oxfmt, replacing Prettier). No API changes; published output is functionally identical, though entry files are now re-export facades whose source maps live in the shared chunks, and use-sync-external-store is now an explicit dependency instead of being bundled (bundling it left CJS require("react") calls that broke importing the package directly in Node).

Enable full type-checking in vp check / vp lint (typeAware + typeCheck) and fix the type issues it surfaced in files tsc --noEmit never covered. Only runtime-visible change: the CLI entrypoint explicitly voids its main() promise.

Rewrite Flow to use computed layout over relying on DOM layout.

Flow now measures node sizes, reconstructs the flow tree, and computes node positions and connector paths from that derived state instead of chaining DOM rect reads. This keeps connectors aligned through resize and scroll changes, supports nested flow structures more predictably, and makes anchor-based connector placement follow the anchor midpoint.

Add target prop to Sidebar.MenuSubButton for parity with Sidebar.MenuButton — forwarded to the link when href is set, so link sub-items can control where they open (e.g. same-tab cross-origin navigation).

Add auto-resize support to InputArea and Textarea.

Add vertical reference markers to TimeseriesChart.

Add horizontal threshold lines to TimeseriesChart.

Include chart components exported from multi-component barrel directories in the generated component registry, with complete props metadata for generic interfaces.

Keep the mobile Sidebar open when focus moves to portaled interactive content.

Disable Sidebar.MenuButton tooltips while the sidebar is expanded or peeking.

Add ChoroplethMap, a GeoJSON region choropleth chart component that joins data rows to features by name/nameProperty and shades regions with a continuous visualMap scale. Includes Kumo light/dark map colours, tooltip formatting, optional legend, hover/click callbacks, roam controls, docs, and demos.

Both BubbleMap and ChoroplethMap now apply a d3-geo projection (latitude-clamped Mercator by default; pass another d3-geo projection or null for raw plotting) and size by aspectRatio so the map fills its container without letterboxing. The container height now derives from the projected window's aspect ratio by default; pass an explicit height to opt back into a fixed pixel height.

Update BubbleMap viewport behavior to avoid resetting user pan and zoom while refreshing bubble data.

BubbleMap now defaults roam to false to avoid accidental pan and zoom interactions. Consumers that want drag-to-pan or scroll-to-zoom can pass roam={true}.

Add orientation="vertical" support to Flow for laying out nodes top-to-bottom. The align prop now controls cross-axis alignment in both orientations.

feat(chart): add BubbleMap chart component

New BubbleMap component renders proportional bubbles over a registered geographic map using ECharts' scatter series. Includes value-based radius scaling, a mapColors palette addition to ChartPalette, and supporting types. Also extracts escapeHtml / defaultValueFormat tooltip helpers into a shared tooltip-utils module reused by SankeyChart.

Keep primary and destructive button active/focus rings matched to their variant color.

Use the Button component for Toast close controls and match the hover tint to the toast variant.

Limit Dropdown content height to available viewport space to prevent overflow.

Replace the internal class merging implementation with cnfast.

fix(button): resolve Firefox rendering artifact when Turnstile is present

Replace translate-y-px with box-shadow: inset 0 1px 0 0 var(--kumo-button-emphasis-bg) on the primary/destructive button emphasis overlay span. The transform triggered a rendering bug in Firefox on pages with Turnstile's contain: strict CSS. The box-shadow achieves the same visual depth effect without the rendering issue.

Fix Dialog size prop to set a fixed width instead of only a minimum width. Previously, dialog content could stretch the dialog beyond its intended size.

Update Base UI to 1.6.0.

Add Toolbar for composing explicit toolbar controls into a shared grouped card.

feat(chart): add enableLegendSelection prop to TimeseriesChart

Opt-in (default false) hidden ECharts legend that lets consumers drive series visibility imperatively via the legendSelect / legendUnSelect / legendToggleSelect actions — useful for building a custom interactive legend with ChartLegend. Series toggled off via the legend are also excluded from the tooltip. Requires registering ECharts' LegendComponent (echarts.use([LegendComponent])). When disabled, behaviour is unchanged.

Extend LegendItems to take pointer events & timeseries merges forwardref to support those events

Update the Button primary and destructive variants with token-derived gradient treatments.

Fix horizontal scroll in Sidebar.Content: always apply overflow-x: hidden on the scroll viewport, not just when collapsed. Base UI's ScrollArea.Viewport sets overflow: scroll as an inline style, which allowed ~14px of horizontal overflow when consumer content (e.g. search buttons with keyboard shortcuts) exceeded the sidebar width.

feat(radio): add generic value type support to Radio.Group and Radio.Item

Fix the green Badge variant missing its background color token.

Keep generated component registry descriptions to JSDoc summaries before markdown sections or code examples.

fix(button): use ring-kumo-line for default secondary button ring

Refine outline and secondary destructive button hover states.

fix(sidebar): correct GroupLabel top margin from mt-6 to mt-4

Allow unprefixed Dialog max-width classes to override the default viewport cap at desktop breakpoints.

Sidebar: mobile rewrite, smooth collapse transitions, and new props

New features:

• mobileBreakpoint prop on Provider — configurable viewport width for mobile detection
• contentClassName prop on Sidebar root — pass-through class for the inner content container
• Controlled mobile state — open prop now controls the mobile sidebar too, not just desktop

Fixes:

• Replaced Base UI Dialog mobile sidebar with a plain <nav> + backdrop for simpler, more predictable transitions
• Collapsible sections now animate closed smoothly when the sidebar collapses instead of snapping shut
• Removed hidden class from Sidebar.MenuSub so sub-menus participate in collapse animations
• Removed inertValue React-version helper — SidebarSlidingView now sets inert imperatively for React 18 compatibility
• Restored inert on closed SidebarCollapsibleContent while removing its data-open attribute

Styling:

• bg-kumo-tint → bg-(--sidebar-active-bg) CSS variable for active/hover/focus backgrounds
• Icon opacity 0.5 → 0.4; chevron gains hover opacity transition
• Header gains shrink-0 and animated padding on collapse
• Content scroll area gains animated gap transition and tabIndex={-1} on viewport
• Sliding views container gains max-w-(--sidebar-width) to prevent overflow
• Mobile sidebar uses --sidebar-animation-duration CSS variable for slide transition

Add React 18 and React 19 compatibility checks for Kumo tests.

Fix Chart (and SankeyChart) rendering in dark mode. The chart canvas now stays transparent so the surrounding bg-kumo-* surface shows through symmetrically in both modes, and ECharts' built-in "dark" theme is applied when isDarkMode is true so the tooltip card, axes, splitLines, and legend text are themed correctly.

fix(sidebar): add text truncation with ellipsis to Sidebar.MenuButton content

Previously, Sidebar.MenuButton used overflow-hidden which clipped long text without showing an ellipsis. Now uses truncate to match Sidebar.MenuSubButton's behavior.

Fix segmented Tabs scroll fade, scroll-into-view, and ring styling:

• Rewrite CSS scroll-fade masking to use @property-animated custom properties, fixing proportional fade rendering across browsers.
• Scroll the selected tab into view on click so it stays visible in overflowing tab lists.
• Move ring ring-kumo-hairline/70 from the inner list to the root container so the segmented variant ring wraps the entire component correctly.

Fix Flow connector rendering in Firefox by emitting valid SVG path data without array commas and setting visible overflow on the SVG element attribute.

Restore React 18-compatible Sidebar inert attribute handling while keeping the full React compatibility CI suite.