Flutter Helper Utils

flutter_helper_utils is a curated Flutter utility package focused on a few high-value areas:

adaptive UI and breakpoint helpers
color parsing, transformation, and accessibility utilities
typed list and sliver list widgets
focused BuildContext and UI extensions
dart_helper_utils re-exported for the Dart-only helpers that still fit the package surface

Version 9 intentionally makes the package smaller and more deliberate.

AI coding-assistant support

This repository ships a package-specific agent plugin for Claude Code and OpenAI Codex (this is tooling for coding agents, not a runtime feature of the Flutter package). It teaches the agent the exact flutter_helper_utils APIs - breakpoint/adaptive-UI semantics, TypedListView contracts, color parsing and WCAG helpers, navigation and theme member names, the v8-to-v9 breaking migration, and version-aware upgrades.

Install in Claude Code:

/plugin marketplace add omar-hanafy/flutter_helper_utils
/plugin install flutter-helper-utils@flutter-helper-utils-tools

Install in OpenAI Codex (CLI; the IDE extension does not support plugins - use its $skill-installer there instead):

codex plugin marketplace add omar-hanafy/flutter_helper_utils
codex plugin add flutter-helper-utils@flutter-helper-utils-tools

Start a new agent session after installing so the skills load. Then try prompts like "make this screen adaptive with flutter_helper_utils breakpoints" or "migrate this app from flutter_helper_utils 8.x to 9.x", or invoke a skill explicitly in Claude Code, e.g. /flutter-helper-utils:use-flutter-helper-utils.

The plugin is installed from this Git repository (not from the pub.dev archive), contains markdown skills only - no hooks, no MCP servers, no telemetry - and its version tracks the package version. Details, the full capability list, updating, and uninstalling are in tooling/ai/flutter-helper-utils/README.md.

Install

dependencies:
  flutter_helper_utils: ^9.2.0

Imports

Most users should import the package once:

import 'package:flutter_helper_utils/flutter_helper_utils.dart';

If you only want the shortcut-heavy surface, use the opt-in sugar import:

import 'package:flutter_helper_utils/sugar.dart';

Notifiers

Notifier utilities were extracted from this package in v9.

If you need the old notifier-style workflows, use better_value_notifier

Highlights

Adaptive UI

runApp(
  const PlatformTypeProvider(
    child: MyApp(),
  ),
);

@override
Widget build(BuildContext context) {
  final breakpoint = context.watchBreakpoint;

  if (breakpoint.isMobile) {
    return const MobileLayout();
  }
  if (breakpoint.isTablet) {
    return const TabletLayout();
  }
  return const DesktopLayout();
}

PlatformEnv

final report = PlatformEnv.report();
final os = PlatformEnv.operatingSystem;
final locale = PlatformEnv.localeName;
final processors = PlatformEnv.numberOfProcessors;

Color Toolkit

final brand = tryToColor('#F97316') ?? Colors.orange;
final accent = tryToColor('rgb(14 165 233)') ?? Colors.blue;

final hex = brand.toHex(includeAlpha: true);
final readableText = brand.contrastColor();
final passesAA = brand.meetsWCAG(
  readableText,
  level: WCAGLevel.aa,
  context: WCAGContext.normalText,
);

Color parsing supports:

hex strings
rgb(...) and rgba(...)
hsl(...) and hsla(...)
hwb(...)
CSS named colors

Typed Lists

TypedListView<Product>(
  items: products,
  itemBuilder: (context, index, product) {
    return ProductTile(product: product);
  },
  spacing: 12,
  header: const Text('Products'),
);

CustomScrollView(
  slivers: [
    const SliverAppBar(title: Text('Products')),
    products.buildSliverList(
      itemBuilder: (context, index, product) {
        return ProductTile(product: product);
      },
      spacing: 12,
    ),
  ],
);

BuildContext and UI Helpers

Use context.popPage() for guarded back navigation and context.forcePopPage() when the current route should be removed directly.

context.pushPage(const DetailsPage());
await context.popPage();
context.showSnackBar(const SnackBar(content: Text('Saved')));
context.unfocus();

final theme = context.themeData;
final width = context.widthPx;
final height = context.heightPx;

Opt-in Sugar

final padding = 16.edgeInsetsAll;
final hSpace = 12.heightBox();
final radius = 24.allCircular;
final rawColor = 0xFFF97316.color;

0xFFF97316.color lives in sugar.dart, not in the main color toolkit.

Widgets

Included widgets and widget systems:

PlatformTypeProvider
PlatformInfoLayoutBuilder
BreakpointLayoutBuilder
TypedListView
TypedSliverList
GradientWidget
MultiTapDetector
ThemeWithoutEffects

Migration

Version 9 includes several breaking changes:

notifier utilities moved to better_value_notifier
deprecated Color.add* aliases removed
GradientWidget.gradientAlignment removed
explicit navigation naming finalized
focus helper naming finalized

For the full v9 migration guide, read migration_guides.md.

Example

The example app in example/ was rebuilt for v9 and acts as the current visual reference for the package surface.

License

MIT