Flocks

A Flutter design system built on widgets.dart — no Material, no Cupertino. 131 components that restyle themselves along three global axes and wear an entire brand from a single configuration.

flocks.live

dependencies:
  flocks: ^0.1.0

import 'package:flocks/flocks.dart';

final myBrand = AppBrandConfig(
  clientSlug: 'acme',
  primaryColor: swatchFromSeed(const Color(0xFF4F46E5)),
);

void main() => runApp(
  AppTheme(
    data: AppThemeData.forBrand(myBrand, dark: false),
    child: const MyApp(),
  ),
);

That is the whole setup — one seed, no network. The icons, the illustrations and the fonts ship inside the package, so this runs on the first flutter run. flocksBrand also exists, but it is the brand of this site, not a starting point: adopting it would put our identity in your product instead of yours.

After that, every component reads the theme by itself:

AppButton(
  icon: AppIconToken.add,
  label: 'New vehicle',
  onPressed: _create,
)

---

Zero Material — and it is verified

lib/src imports neither material.dart nor cupertino.dart. That is not an intention in a README: it is 21 suites in test/architecture/ that sweep the code on every flutter test, and the allow-list has one entry — TextSelectionControls, which has no equivalent in the widgets layer.

This matters because a design system that reuses Card, InkWell or Scaffold inherits Material's visual decisions along with them. Here the box, the ripple and the scaffold belong to the system.

Those same suites police the rest: no component invents a bool _isHovered instead of using the shared interaction state; no animation uses a raw Curves.*; no tappable target is mute to a screen reader. And every axis has a pair of tests — a census (nobody is outside) and a reach (changing the global changes the pixel). The absence of an offender is not the presence of an effect.

Three global axes

One value in the theme restyles all 131 components at once.

Axis	Values	What it changes
AppStyle	filled · outlined · elevated	The fill, border and shadow of every box
AppRadiusMode	reto · redondo · circular · padrao	The corner of every surface
AppGlassTheme	on · off	Glass on floating surfaces

AppThemeData.forBrand(brand, dark: false).copyWith(
  styleTheme: const AppStyleTheme(style: AppStyle.outlined),
  radiusTheme: const AppRadiusTheme(mode: AppRadiusMode.reto),
);

Alongside them come the motion axis (which honors the OS's "reduce motion"), the transparency axis (an accessibility gate) and the icon axis.

White-label from one hex

A brand is an object. The whole palette — 11 stops per role, light and dark — comes out of a seed, derived by HCT tone (perceptually uniform), which preserves hue and chroma and gives consistent contrast between stops.

final myFullBrand = AppBrandConfig(
  clientSlug: 'acme',
  primaryColor: swatchFromSeed(const Color(0xFF4F46E5)),
  neutralLightColor: neutralSwatchFromSeed(const Color(0xFF6B7280)),
  typography: const AppBrandTypography(displayFamily: 'SpaceGrotesk'),
);

A brand is only what the system needs to draw itself: the palette, the global axes, the typography. It carries no app name, no site, no asset base URL, no store link. Those describe your product, not its styling — and a design system that held them would be asserting that your app has a splash screen, an OTP flow, a nav rail and a Play Store listing. That is the same coupling Flocks refuses when it declines to reuse Card and Scaffold. Where that identity lives is your call; the components take it as parameters.

The consequence is that nothing here reaches for a network you did not ask for. AppIcon, AppIllustration and AppAuthSplitLayout all accept null where a remote asset would go, and simply draw nothing.

lib/src/brand/brands/flocks_brand.dart is the complete example — and every registered brand's contrast is verified against WCAG AA, brand × brightness, in test/src/theme/contrast_test.dart. The rules are in doc/COLOR_ACCESSIBILITY_RULES.md.

Pluggable icons

AppIconToken is the 55 names the components use — the contract a provider has to satisfy. The default one serves SVGs from inside the package: 25 KB, it works offline, on the first flutter run, with no CDN.

Swapping the set is swapping the provider, and there are three ready paths:

A whole library	flocks_phosphor — 1,512 icons × 6 weights, font-based and tree-shakeable, with weight as a brand axis
Material, Font Awesome…	flocks_material is the reference implementation: one table and one build
Your own CDN	AppNetworkIconProvider(baseUrl: …), already in the core

AppThemeScope(
  iconProvider: const PhosphorIconProvider(weight: PhosphorWeight.bold),
  builder: (context, theme) => MyApp(theme: theme),
)

The core embeds only the contract because Flutter does not tree-shake assets: everything in the pubspec is paid for by every adopter. A Material adapter has to be a separate package for the same reason the core does not import material.dart — and the architecture test bars whoever tries.

Documentation in two languages

Every component's catalog entry (lib/src/**/*.meta.dart, served as doc/mcp/catalog.json) carries its prose in English and in Brazilian Portuguese. Both are required by the type: LocalizedText and LocalizedList have no single-language constructor, so a component cannot enter the catalog half-translated.

summary: LocalizedText(
  en: 'Compact status pill, tinted by a semantic color role.',
  pt: 'Pill compacta de status, tingida por papel de cor semântico.',
),

That is what lets flocks.live publish one route per component in each language without either side going missing. states and variants stay outside it on purpose: they name API surface (an enum's value, an interaction state), and that vocabulary is English throughout the package — it is checked against the allow-list in test/architecture/catalog_vocabulary.dart.

Structure

lib/src/
  tokens/       color, spacing, radius, typography, icon
  theme/        AppThemeData and the axes
  brand/        white-label
  foundation/   interaction, focus, semantics, icon providers
  motion/       micro-interactions
  atoms/ molecules/ organisms/    the components

Every component carries a .doc.md, a .preview.dart, a Widgetbook case and a test — required by dart run tool/validate_components.dart.

Development

flutter test --exclude-tags golden

flutter test --tags golden

dart run tool/validate_components.dart

The goldens compare pixels and are sensitive to the rasterizer: run them on macOS, and never --update-goldens in bulk without looking at what changed. tool/golden_triage.py builds contact sheets per family for the review.

License

MIT — see LICENSE. The fonts (assets/fonts/) are OFL 1.1 and the icons (assets/icons/) are from Phosphor Icons under MIT; the license texts ship beside the files.

lib/src/foundation/pointer/pointer_interceptor_web.dart is adapted from pointer_interceptor_web (flutter/packages) under BSD-3-Clause — Copyright 2013 The Flutter Authors. All rights reserved. The notice also sits at the top of that file, as BSD-3 requires.