flutter-patterns

flutter-patterns is a skill for Claude Code from terrene-foundation/metis. It costs 64 tokens per session (916 once invoked), scanned A, original, Apache-2.0.

A collection of patterns for building Flutter apps, including shared visual styles, layouts that adapt to screen sizes, app state, and cross-platform behavior.

In plain words
What is it for?
Use it to create design systems, reusable components, responsive layouts, themes and dark mode, state management, and widget or integration tests.
Why use it?
It helps keep Flutter interfaces consistent and makes applications easier to structure across phones, tablets, and other platforms.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/terrene-foundation/metis/19-flutter-patterns
Any agent
npx skills add terrene-foundation/metis --skill 19-flutter-patterns
Clone the repo
git clone --depth 1 https://github.com/terrene-foundation/metis

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for flutter-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/terrene-foundation/metis/19-flutter-patterns.svg)](https://agentmods.dev/skills/terrene-foundation/metis/19-flutter-patterns)
Your own site
<a href="https://agentmods.dev/skills/terrene-foundation/metis/19-flutter-patterns"><img src="https://agentmods.dev/badge/skills/terrene-foundation/metis/19-flutter-patterns.svg" alt="Measured on agentmods" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 916 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00064 $0.00916
Opus 5 $0.00032 $0.00458
Sonnet 5 $0.00013 $0.00183
Haiku 4.5 $0.00006 $0.00092

Measured 5d ago against content hash b8f0fc601393, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

flutter-patterns scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/19-flutter-patterns/SKILL.md · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Flutter Development Patterns

Production-ready patterns for Flutter application development including design systems, responsive layouts, and enterprise-grade component libraries.

Overview

Flutter patterns for:

  • Design system creation and management
  • Responsive layout strategies
  • Component library architecture
  • State management patterns
  • Cross-platform considerations

Reference Documentation

Design System Creation

  • creating-design-system - Complete guide to creating Flutter design systems
    • Phase-based implementation approach
    • Token systems (colors, typography, spacing)
    • Component architecture
    • Responsive patterns
    • Dark mode support
    • Documentation standards

Design System Usage

  • flutter-design-system - Institutionalized design system usage directive
    • Design system location and structure
    • Single import pattern
    • Component usage examples
    • Mandatory usage rules

Testing Patterns

  • flutter-testing-patterns - Flutter testing strategies
    • Widget testing patterns
    • Integration testing
    • Golden tests
    • Test organization

Quick Patterns

Design Token System

abstract class AppColors {
  // Primary palette
  static const primary = Color(0xFF2563EB);
  static const primaryLight = Color(0xFF3B82F6);
  static const primaryDark = Color(0xFF1D4ED8);

  // Semantic colors
  static const success = Color(0xFF10B981);
  static const warning = Color(0xFFF59E0B);
  static const error = Color(0xFFEF4444);
}

abstract class AppSpacing {
  static const xs = 4.0;
  static const sm = 8.0;
  static const md = 16.0;
  static const lg = 24.0;
  static const xl = 32.0;
}

Responsive Breakpoints

class Breakpoints {
  static const mobile = 600.0;
  static const tablet = 900.0;
  static const desktop = 1200.0;

  static bool isMobile(BuildContext context) =>
    MediaQuery.of(context).size.width < mobile;
}

Read the full file on GitHub · 136 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 136 lines · 64 tokens per session scan A b8f0fc601393

Subscribe to this mod's changes

flutter-patterns is a skill published in the GitHub repository terrene-foundation/metis (2 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 64 tokens to every session and 916 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories

orca-emulator-android

Control an Android emulator / device from inside Orca using the orca CLI. Use for listing/booting AVDs, taps, swipes, typing, hardware buttons (incl. Back and Recents), rotation, app install/launch, runtime permissions, the accessibility tree, and logcat — driving a real adb-connected device or emulator.…

stablyai/orca · 104 tokens

android-tombstone-symbolication

Symbolicate the .NET runtime frames in an Android tombstone file. Extracts BuildIds and PC offsets from the native backtrace, downloads debug symbols from the Microsoft symbol server, and runs llvm-symbolizer to produce function names with source file and line numbers. USE FOR triaging a .NET MAUI or Mono Android app…

dotnet/skills · 176 tokens

dogfood

Systematically explore and test a mobile app on iOS/Android with agent-device to find bugs, UX issues, and other problems. Use when asked to dogfood, QA, exploratory test, find issues, bug hunt, or test this app on mobile.

callstack/agent-device · 55 tokens

winapp-maui

Package and sign .NET MAUI Windows apps with winapp, resolving the resizetizer manifest dependency. Use when packaging or signing a .NET MAUI Windows app, building a MAUI MSIX or signed unpackaged build in CI, or fixing 'manifest contains unresolved placeholders ($placeholder$)' errors from winapp package.

microsoft/winappCli · 71 tokens

apple-search-ads

When the user wants to set up, optimize, or scale Apple Search Ads (ASA) campaigns — including keyword bidding, match types, campaign structure, Creative Product Sets, CPP routing, and ROAS optimization. Use when the user mentions "Apple Search Ads", "ASA", "Search Ads", "Search tab ads", "Today tab ads", "CPT"…

Eronred/aso-skills · 127 tokens

android-pentest

安卓应用渗透测试 — APK分析、Hook、自动化测试、运行态驱动、签名恢复、抓包分析.

Netw0rkNoob/VulnClaw · 32 tokens