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@ossrandom/design-system

RandomCodeSpace Design System — strongly-typed React component library.

Signal Red on Cod Gray. Bricolage Grotesque headlines (opsz + ss01), Plus Jakarta Sans body, Geist Mono code — all OFL-1.1, self-hosted variable woff2. Built for developer tooling.

📖 Live docs · live previews · playground — auto-generated component reference at randomcodespace.github.io/design-system.

🤖 For AI agents — point your tooling at llms.txt (concise) or llms-full.txt (every prop signature + canonical example). Both auto-regenerate on every push.

CI E2E Release Pages

Install

From npm (default):

npm install @ossrandom/design-system
# or
pnpm add @ossrandom/design-system

From the GitHub Packages mirror — note the different scope:

# .npmrc in the consuming project
@randomcodespace:registry=https://npm.pkg.github.com
//npm.pkg.github.com/:_authToken=<PAT with read:packages>
npm install @randomcodespace/design-system

Why two scopes? GitHub Packages requires the npm scope to match the repo owner (RandomCodeSpace → @randomcodespace), so the GHP mirror publishes as @randomcodespace/design-system. The canonical npm package stays @ossrandom/design-system. Same source, same version, same contents — only the package name differs. Imports inside your code match whichever one you installed (e.g. from "@randomcodespace/design-system" if you pulled from GHP).

Usage

import type { ButtonProps, TableColumn } from "@ossrandom/design-system";
import { Button, Table, ThemeProvider, toast } from "@ossrandom/design-system";
import "@ossrandom/design-system/styles.css";

interface Service { id: string; region: "us-east-1" | "eu-central-1"; cpu: number; }

const columns: readonly TableColumn<Service>[] = [
  { key: "id",     title: "ID",     dataKey: "id" },
  { key: "region", title: "Region", dataKey: "region" },
  { key: "cpu",    title: "CPU",    dataKey: "cpu", render: (cpu) => `${cpu}%` },
];

export function Dashboard({ services }: { services: readonly Service[] }) {
  return (
    <ThemeProvider mode="light">
      <Table<Service> columns={columns} data={services} rowKey="id" />
      <Button variant="primary" onClick={() => toast.show({ title: "Deploying…" })}>
        Deploy
      </Button>
    </ThemeProvider>
  );
}

What's in the box

  • 50+ React components — Buttons, Inputs, Form controls, Layout primitives, Navigation, Feedback, Data display, Chat, Code/Markdown/Terminal/RTE, plus ThemeProvider + imperative toast
  • Charts (opt-in subpath) — Chart (line/area/bar/scatter), Sparkline, Donut, RadialGauge, UptimeBar, Treemap, ServiceMap — see Charts below
  • Strongly-typed token unions (Size, SpaceSize, Radius, ThemeMode, BrandColor, Direction, Axis, …)
  • Generic components: Select<V>, Combobox<V>, Tabs<K>, Menu<K>, RadioGroup<V>, Table<T>
  • Strict TypeScript — full type definitions emitted to dist/, source maps + declaration maps included
  • Single CSS file at dist/styles.css (tokens + component styles concatenated; light + dark themes via data-theme on <html>)
  • Zero runtime deps — only react + react-dom (peer)

Project layout

src/
  index.tsx              public entry — re-exports everything (runtime + types)
  tokens.ts              design token unions
  components.ts          prop interfaces (types-only, hand-written)
  styles.css             component styles (concatenated into dist/styles.css)
  internal/cx.ts         className composer + uid helper
  components/
    buttons.tsx          Button, IconButton, ButtonGroup
    inputs.tsx           Input, NumberInput, PinInput, Textarea
    selects.tsx          Select, Combobox
    form-controls.tsx    Checkbox, RadioGroup, Switch, Slider, DatePicker,
                         DateRangePicker, FileUpload, FormField
    badges.tsx           Badge, StatusDot
    layout.tsx           Card, Space, ScrollDiv, Divider, Grid (+ Grid.Col)
    navigation.tsx       Tabs, Menu, Breadcrumb, Pagination, Steps
    feedback.tsx         Alert, Modal, Drawer, Progress, Skeleton, Spin,
                         Tooltip, toast, ToastRegion
    data-display.tsx     Table, Stat, Avatar, Timeline
    chat.tsx             Chat
    code.tsx             CodeBlock, Markdown, Terminal, RichTextEditor
    page.tsx             PageHeader, AppShell
    theme.tsx            ThemeProvider, useTheme
preview/                 39 design-gallery HTML cards
ui_kits/                 marketing / app / docs reference layouts (JSX)
assets/                  brand marks (light + dark variants)
colors_and_type.css      design tokens — CSS variables (--bg-0, --accent, …)

Editing components

Each component file is self-contained: edit it, the public entry (src/index.tsx) already re-exports it. Add a new component by creating a file under src/components/, exporting it, and adding one re-export line to src/index.tsx.

The CSS shipped with each component uses .rcs-* class names defined in src/styles.css. Tokens (colors, spacing, radii, shadows, motion) live in colors_and_type.css at the project root and are theme-swappable via data-theme="light|dark" on the document element.

Mounting the toast region

toast.show() enqueues toasts onto an in-memory store. Render <ToastRegion /> once near the root of your app to display them — typically inside ThemeProvider:

import { ThemeProvider, ToastRegion, toast } from "@ossrandom/design-system";

<ThemeProvider mode="light">
  <App />
  <ToastRegion />
</ThemeProvider>

Charts

Charts ship behind an opt-in subpath because they pull heavier peer deps. The main entry stays zero-dep — you only pay for charts if you import them.

import {
  Chart, Sparkline, Donut, RadialGauge,
  UptimeBar, Treemap, ServiceMap,
} from "@ossrandom/design-system/charts";

Install the peer deps for the charts you actually render:

Component Peer dep Fallback
Chart (time-series) uplot SVG renderer (small datasets only)
Sparkline — inline SVG, zero deps
Donut / RadialGauge — inline SVG, zero deps
UptimeBar — canvas2d, zero deps
Treemap d3-hierarchy canvas2d squarify
ServiceMap cytoscape + cytoscape-cose-bilkent force-directed canvas

Charts auto-handoff to WebGL (@deck.gl/core, @deck.gl/layers) when the dataset crosses an engine threshold (Chart ≥100k points; ServiceMap ≥200 nodes). The data-engine attribute on the rendered root reflects the active backend (svg / canvas / webgl); set --rcs-show-engine: 1 to surface a dev badge.

All chart components read tokens via readChartTheme() and re-render on data-theme swap — Signal Red accent, mono micro-labels, tabular numerics out of the box.

ServiceMap — interaction model

ServiceMap is a directed graph; semantics live in the data, not the visuals on top of it.

  • Direction. Edges flow source → target with arrowheads at the target end. The deck.gl path uses ArcLayer (gradient source/target colors); the canvas path uses Cytoscape's bezier curve with a triangle arrow.
  • Node size = degree. Each dot's radius is computed from in + out edge count using √degree scaling — 3 px (isolated) → 14 px (densest hub). Hubs surface visually without dwarfing leaves.
  • Status drives fill. healthy / degraded / failing / unknown map to the success / warning / danger / fg-3 tokens. Failing edges paint in danger.
  • Labels. Node labels sit below each dot in a light weight (font-weight: 400, color: --fg-3) so they don't compete with edges. Edge labels (label?: string on ServiceEdge) are rendered but hidden by default — they reveal only when their edge is in the focus set.
  • Hover / touch focus. Hovering or tapping a node dims the rest of the graph to ~18 % opacity and lights the focused node, its incident edges, its neighbors, and the edge labels for those incident edges. Hovering an edge lights the edge plus both endpoints. pointerleave clears the focus state.
  • Engine handoff. Auto resolves to webgpu › webgl › canvas based on nodes + edges count vs. the threshold. The deck.gl path uses an internal adjacency map and setProps({ layers }) to re-render highlight state without rebuilding the WebGL context.
<ServiceMap
  nodes={[
    { id: "lb",  label: "load-balancer", status: "healthy" },
    { id: "au",  label: "auth-service",  status: "degraded" },
    { id: "bl",  label: "billing",       status: "failing" },
    /* … */
  ]}
  edges={[
    { source: "lb", target: "au", label: "http" },
    { source: "au", target: "bl", label: "grpc · 5xx", status: "failing" },
    /* … */
  ]}
  height={440}
  onNodeClick={(n) => console.log("node:", n.id)}
/>
<Chart
  type="line"
  series={[{ id: "p99", label: "p99 latency", data: points }]}
  height={240}
/>

<Sparkline data={[12, 19, 14, 22, 28, 24, 31]} />

<Donut
  segments={[
    { label: "Compute",  value: 45 },
    { label: "Database", value: 25 },
    { label: "Cache",    value: 18 },
    { label: "Other",    value: 12 },
  ]}
  centerLabel="cores"
  centerValue="847"
  showLegend
/>

Local development

pnpm install
pnpm typecheck            # tsc --noEmit
pnpm lint                 # eslint src/**/*.{ts,tsx}
pnpm test                 # vitest — 128 unit tests, jsdom + RTL
pnpm test:coverage        # vitest with v8 coverage
pnpm build                # emits dist/ with .d.ts + .js + styles.css
pnpm build:site           # builds the full Pages site → _site/
pnpm test:e2e:install     # one-time: download Playwright Chromium
pnpm test:e2e             # 28 e2e tests against the built _site (desktop + mobile)

The build script runs tsc -p tsconfig.build.json then concatenates colors_and_type.css + src/styles.css into dist/styles.css. The result is a publish-ready dist/ folder containing .js, .d.ts, source maps, declaration maps, and the merged stylesheet.

CI: ci.yml runs typecheck → lint → test → build on every push/PR. e2e.yml runs the Playwright suite. pages.yml redeploys the docs site (and llms.txt) on every push to main.

Releases

Releases go out automatically when you push a SemVer tag (v0.1.0, v0.2.0-rc.1, …) — see .github/workflows/release.yml. The pipeline:

  1. Build & verify — typecheck, build, then refuse to publish if the tag (v$X.Y.Z) doesn't match package.json version
  2. Publish · npm — npm publish --provenance --access public to the public registry
  3. Publish · GitHub Packages — same package, registry rewritten to https://npm.pkg.github.com, auth via GITHUB_TOKEN
  4. GitHub Release — auto-generated notes, with the .tgz tarball attached

Both registries publish under the same scope (@ossrandom/design-system).

Cutting a release:

pnpm version minor   # bumps package.json + creates v0.2.0 tag
git push --follow-tags

See .github/SETUP.md for required secrets (NPM_TOKEN only — GITHUB_TOKEN is automatic).

License

MIT — see LICENSE. Free to use, fork, modify, and ship.

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Releases 4

v0.3.0 Latest
Apr 29, 2026
+ 3 releases

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