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Agent skill

Flutter Design System

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Enforce Design Language System adherence in Flutter. An agent skill from HoangNguyen0403/agent-skills-standard.

MITAuto-check passedMobile

Install Flutter Design System

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill flutter-design-system -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard flutter-design-system --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/flutter/flutter-design-system .claude/skills/flutter-design-system && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
flutter-design-system
GitHub stars
572
Token cost
~598 tokens
SKILL.md length
198 words
Files
5 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Enforce Design Language System adherence in Flutter. An agent skill from HoangNguyen0403/agent-skills-standard.

  • Works in 2 steps: Check main.dart: Look for MaterialApp… → Determine Pattern
  • Implementing design tokens
  • SKILL.md covers Priority: P0 (CRITICAL), Phase 0: Context Discovery…, Guidelines and Anti-Patterns, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Flutter Design System is an agent skill from HoangNguyen0403/agent-skills-standard. Enforce Design Language System adherence in Flutter. Use when implementing design tokens, preventing hardcoded colors/spacing, or building a DLS.

Its SKILL.md is about 600 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `evals/evals.json`, `references/dls-modular-pattern.md` and `references/monolithic-pattern.md`).

It sits in Mobile, covering Cross-platform mobile apps and Design systems. It works with Flutter. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Implementing design tokens
  • Preventing hardcoded colors/spacing

Example prompts

  • “/flutter-design-system”

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

  1. Check main.dart: Look for MaterialApp theme configuration.
  2. Determine Pattern

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Flutter Design System loads about 598 tokens when it runs, and up to ~2.9k if it reads all its reference files. Until then it costs about 42 tokens; SKILL.md has 198 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~42
When it runs · the whole SKILL.md, loaded when a task matches
~598
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 198 words, ~598 tokens.

Download SKILL.mdSave it as .claude/skills/flutter-design-system/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.
name
flutter-design-system
description
Enforce Design Language System adherence in Flutter. Use when implementing design tokens, preventing hardcoded colors/spacing, or building a DLS.

Flutter Design System Enforcement

Priority: P0 (CRITICAL)

Zero tolerance for hardcoded design values.

Phase 0: Context Discovery (MANDATORY)

Before UI refactoring, identify project's Theme Archetype:

  1. Check main.dart: Look for MaterialApp theme configuration.
  2. Determine Pattern:
  • Theme-Driven (Adaptive): VThemeData(...).toThemeData() or extensive ThemeData overrides → use Theme.of(context).textTheme / theme.textTheme.
  • Token-Driven (Static): Use static tokens (VTypography.*) only when no global theme bridge exists, or when defining theme itself.

Guidelines

  • Colors: Use tokens (VColors.*, AppColors.*), never Color(0xFF...) or Colors.red.
  • Spacing: Use tokens (VSpacing.*), never magic numbers like 16 or 24.
  • Typography: Prioritize theme.textTheme.* for adaptive UI. Use VTypography.* tokens only for theme definitions or non-contextual logic. Never use inline TextStyle.
  • Borders: Use tokens (VBorders.*), never raw BorderRadius.
  • Components: Use DLS widgets (VButton) over raw Material widgets (ElevatedButton) if available.

Detailed Examples

Anti-Patterns

  • No Hex Colors: Color(0xFF...) strictly forbidden.
  • No Color Enums: Colors.blue forbidden in UI code.
  • No Magic Spacing: SizedBox(height: 10) forbidden.
  • No Inline Styles: TextStyle(fontSize: 14) forbidden.
  • No Raw Widgets: Don't use ElevatedButton when VButton exists.

mobile-ux-core | flutter/widgets | idiomatic-flutter

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • ElevatedButton

  • SizedBox

  • VColors

  • magic number

  • Additional task-grounded exact anchors: TextStyle

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 4 other files (references) in skills/flutter/flutter-design-system of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/dls-modular-pattern.md
  • references/monolithic-pattern.md
  • references/usage.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Flutter Design System next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Flutter Design System compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Flutter Design System this skillHoangNguyen0403/agent-skills-standard572—~598Automated safety check: PassMIT
Cometchat Flutter V6 Customizationcometchat/cometchat-skills132—~1.8kAutomated safety check: PassMIT
Frontend UI StandardsMaxHan7/frontend-ui-standards-skill106—~2.4kAutomated safety check: PassMIT
Frontend Designavibebuilder/claude-prime120—~2.1kAutomated safety check: PassMIT
Cometchat Flutter V6 Componentscometchat/cometchat-skills132—~2.3kAutomated safety check: PassMIT
Cometchat Flutter V6 Testingcometchat/cometchat-skills132—~1.4kAutomated safety check: PassMIT

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Works with

Categories

Questions about Flutter Design System

What does Flutter Design System do?

Enforce Design Language System adherence in Flutter. An agent skill from HoangNguyen0403/agent-skills-standard. Flutter Design System is an agent skill from HoangNguyen0403/agent-skills-standard. Enforce Design Language System adherence in Flutter.

When should I use Flutter Design System?

Flutter Design System fits situations like: implementing design tokens; preventing hardcoded colors/spacing.

How do I install Flutter Design System in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill flutter-design-system -a claude-code`. Or copy the skill folder (skills/flutter/flutter-design-system in HoangNguyen0403/agent-skills-standard) into .claude/skills/flutter-design-system in your project. Claude Code loads it when a task matches its description.

How do I install Flutter Design System in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill flutter-design-system -a codex`. Or copy the skill folder (skills/flutter/flutter-design-system in HoangNguyen0403/agent-skills-standard) into .agents/skills/flutter-design-system in your project. Codex loads it when a task matches its description.

Can I use Flutter Design System in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill flutter-design-system -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/flutter-design-system, .gemini/skills/flutter-design-system, .github/skills/flutter-design-system and .opencode/skills/flutter-design-system in your project.

What does Flutter Design System need to run?

SKILL.md names no scripts, command-line tools or credentials: Flutter Design System is instructions for the agent only.

Does Flutter Design System access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Flutter Design System safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Flutter Design System use?

Flutter Design System is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Flutter Design System use?

About 598 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.4k tokens, read only when the agent opens those files.

What are the alternatives to Flutter Design System?

Skills that share tags, products or a category with Flutter Design System: Cometchat Flutter V6 Customization (cometchat/cometchat-skills, 132 stars), Frontend UI Standards (MaxHan7/frontend-ui-standards-skill, 106 stars), Frontend Design (avibebuilder/claude-prime, 120 stars) and Cometchat Flutter V6 Components (cometchat/cometchat-skills, 132 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Flutter Design System?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.