hamen/material-3-skill for Material Design 3 implementation
Material Design 3 skill for Claude Code — 30+ components, design tokens, theming, responsive layout, and MD3 compliance audit
At a glance
- What is it?
- hamen/material-3-skill is a portable Markdown skill for AI coding assistants implementing Material Design 3 across Jetpack Compose, Flutter, and limited web projects. It focuses on Compose, supplies component and token references, and offers a cross-platform MD3 audit, but its guidance is a best-effort distillation that can drift from current Google documentation.
- Who is it for?
- Adopt material-3-skill when an AI-assisted Compose workflow needs organized Material Design 3 guidance and a reusable review checklist. Do not treat it as a substitute for current platform specifications, particularly for Material Web or newer M3 Expressive behavior.
- Can I use it commercially?
- Yes. MIT is a permissive licence: you can use, modify and sell software built on it, as long as you keep its copyright and licence notices.
- Is it still maintained?
- Yes. The repository last received commits 115 days ago.
- What is it written in?
- Mainly Shell, according to GitHub's language statistics.
Answers come from the project's GitHub data, last synced on November 3, 2026, and from our analysis. They are not legal advice.
Editorial analysis
The interface guidance problem material-3-skill addresses
material-3-skill gives AI coding assistants a focused reference for implementing Google's Material Design 3 system. It is intended for developers asking an assistant to build Compose screens, configure Material themes, select components, apply responsive layout patterns, or review an application against MD3 practices. The repository describes a skill format centered on skills/material-3/SKILL.md, with supporting reference files under skills/material-3/references/.
The project is not a runtime UI library. It does not render components, export Compose APIs, or replace an Android, Flutter, or web dependency. It supplies instructions and reference material that a compatible assistant can load while answering questions or generating code. A team that needs executable Material components still needs the corresponding platform library. A team concerned about inconsistent assistant output can use this repository as planning guidance.
The documented scope includes design tokens, components, theming, accessibility, layout, and compliance auditing. The README says the catalog covers more than 30 components, with Compose-oriented mappings and web element names where applicable. It also covers M3 Expressive and changes described in Google's Google I/O 2026 guidance, including expressive layout and scaffold patterns, an 8dp spacing system, expressive lists and menus, search patterns, watch and XR form factors, and Compose-first Android direction.
There is a deliberate platform hierarchy. Jetpack Compose is primary, Flutter is secondary, and web support is limited. That hierarchy reflects a practical compatibility issue: Material Design provides shared design concepts, but its implementation APIs, component availability, and motion support differ across Android, Flutter, and browser targets.
The SKILL.md and references directory workflow
The main entry point is skills/material-3/SKILL.md. The README describes a planning process in which this file contains the primary instructions while focused reference files organize more detailed guidance. The repository includes skills/material-3/references/component-catalog.md for components, plus layout-and-responsive.md and typography-and-shape.md for their respective subjects.
For an assistant that can load SKILL.md files, this arrangement allows the repository to fit an existing skill-aware workflow without adding an application runtime. Claude Code receives additional packaging through .claude-plugin/plugin.json and the marketplace manifest at .claude-plugin/marketplace.json. Version 1.1.1 moved the plugin manifest under skills/material-3/.claude-plugin/plugin.json after the previous GitHub plugin installation path failed its marketplace lookup.
The data flow is instructional. A developer asks an assistant to build or review an interface. The assistant loads the skill, consults the main file and relevant references, and then produces framework-specific guidance or code. The repository does not automatically inspect a source tree, run an audit, or emit a machine-readable compliance report. The README describes an audit mode that scores applications across 10 categories for Compose/Kotlin, Flutter/Dart, and web/CSS source trees, but it does not identify a dedicated scanner or CLI for that function.
The skill was assembled collaboratively by a human and an AI agent from public sources. The listed sources include Google's Material Design documentation, Android Developers material guidance, AndroidX references, Flutter documentation, @material/web references, community guides, and model training data. The README itself calls the result a best-effort distillation. That qualification is central when deciding how much authority to give its recommendations.
Jetpack Compose coverage and Flutter's narrower role
Jetpack Compose is the main implementation target. The README names MaterialTheme, Material 3 composables, adaptive layouts, edge-to-edge and inset handling, and current Compose Material3 patterns as covered areas. It points to Android Developers documentation and AndroidX API references for implementation guidance. This makes the repository most relevant to Android teams using Material 3 through Compose.
The skill is not a complete Compose template, however. A generated screen still depends on the target project's Gradle configuration, Compose dependencies, Android version, navigation structure, state management, and existing design decisions. The repository helps an assistant choose patterns and components, but it cannot supply missing application infrastructure or guarantee that generated code compiles in a particular project.
Flutter receives narrower coverage. The documented concepts include ThemeData with useMaterial3 set to true, ColorScheme.fromSeed, and community packages for dynamic color. Those APIs can help an assistant align Flutter code with MD3, but Flutter widgets, theming behavior, and package versions differ from Compose. Generated answers should be checked against the Flutter and package versions already used by the application.
M3 Expressive also has uneven platform support. The README identifies Compose as the best match for available Expressive motion and adaptive navigation. It does not claim full Expressive parity for Flutter or web. A design requirement should therefore be translated at the platform level rather than copied mechanically from a Compose answer into Dart, Kotlin markup, HTML, or CSS.
Component, token, theme, and layout references
The component catalog maps Material concepts to platform-specific implementations. For Compose, it provides Compose-oriented mappings. For web, it includes element names where applicable, together with attributes and examples. The catalog is most useful for translating a design requirement into the vocabulary expected by a particular framework, not for copying one platform's implementation into another without review.
Theming is another explicit use case. The README covers color roles and theme generation. Its platform notes identify MaterialTheme for Compose and ColorScheme.fromSeed for Flutter. The reference set also includes typography and shape documentation. This gives an assistant organized sources for typography scales, spacing, component defaults, and color roles, although the README does not reproduce the full token tables.
Layout guidance covers responsive behavior and scaffold patterns. The Google I/O 2026 guidance cited by the repository adds an 8dp spacing system, expressive layouts, expressive lists and menus, search and search app bar patterns, and watch or XR form factors. These subjects are relevant to adaptive Android work, but they also increase the number of target conditions a developer must check.
Accessibility is listed among the covered areas, yet the README does not document an automated accessibility test suite or a fixed set of executable checks. The skill can guide an assistant toward accessible implementation. It cannot establish that generated code passes Android, Flutter, or browser accessibility tooling.
The ten-category audit and its interpretation
The MD3 compliance audit is a useful addition because it applies a shared checklist across Compose/Kotlin, Flutter/Dart, and web/CSS. The README says the audit scores applications across 10 categories. That structure can turn a broad request to check an interface into a repeatable design and code review rather than a response focused only on color or typography.
The audit remains advisory. The repository does not identify a scanner, parser, test command, severity model, passing threshold, or machine-readable output schema. The documented interaction is therefore an assistant review of source code and an explanation of its findings. A score from that process should not be described as official Material compliance certification.
Cross-platform scoring also needs care. Compose is primary, Flutter is secondary, and web is limited. The README says Material Web is in maintenance mode and that M3 Expressive is not implemented on Web. Consequently, two applications can receive similar findings for a visual or interaction difference even though their platforms do not provide the same component and motion capabilities.
For engineering teams, the audit fits design review and pull-request review. It can expose missing MD3 concerns and create a prompt for targeted follow-up. Official platform documentation and current project code should remain the authority when a score conflicts with an available API or required behavior.
Claude Code installation and a first assisted task
The README says version 1.1.1 fixes Claude Code installation by shipping a plugin marketplace manifest. It directs users to the current `npx skills` and Claude Code marketplace installation flows.
For another skill-aware assistant, the relevant entry point is skills/material-3/SKILL.md. That assistant must already support loading SKILL.md files. The repository does not define one universal installation command for every compatible assistant.
For Claude Code, the current Installation section should take precedence over the superseded v1.0.0 instructions. The v1.1.1 release notes state that the earlier command failed with a marketplace lookup error. They also identify the replacement files:.claude-plugin/marketplace.json and skills/material-3/.claude-plugin/plugin.json.
A first useful request should identify the target platform and a bounded result. In a Compose project, ask the assistant to propose a MaterialTheme and one screen, with each component, token, layout, and accessibility choice tied to the skill references. In Flutter, request a theme using `useMaterial3` and `ColorScheme.fromSeed`. For an audit, provide the relevant source tree and request findings across the 10 documented categories, asking the assistant to distinguish missing guidance from unsupported platform capabilities.
Maintenance, licensing, and the cost of adopting the skill
The repository is not archived, and its last push was on 2026-07-15. Its documented current version is 1.1.1, released on 2026-06-29. The release history includes v1.1.0 and v1.0.0, with both listed in May 2026. This establishes repository activity and versioned releases, but it does not guarantee that every framework reference will remain current between releases.
Adoption cost is primarily review and integration. A revision may change design guidance, component mappings, or platform assumptions. Before regenerating application code, developers should compare the changed SKILL.md and reference files. Adopting the skill itself does not require adding a UI dependency, although generated code may expose missing Compose, Flutter, or @material/web packages in the target project.
The repository declares the MIT license. Teams redistributing repository content must review LICENSE and preserve the applicable notice. That statement covers this repository only. It does not replace review of the separate terms attached to Google's documentation, Android and Flutter platforms, community packages, or other libraries used by an application.
The top-level repository also includes CONTRIBUTING.md and tests/. Those entries provide concrete places to inspect contribution requirements and repository checks. The README does not explain what tests/ validates, so its coverage should not be assumed to include generated Compose code, Flutter output, browser accessibility, or MD3 scoring quality.
Editorial conclusion
Adopt material-3-skill when an AI-assisted Compose workflow needs organized Material Design 3 guidance and a reusable review checklist. Do not treat it as a substitute for current platform specifications, particularly for Material Web or newer M3 Expressive behavior. Before using generated code in production, compare skills/material-3/SKILL.md and the relevant files in skills/material-3/references/ with the current Google and platform documentation.
Frequently asked questions
What does hamen/material-3-skill help an AI coding assistant do?
It supplies Material Design 3 instructions and references covering components, design tokens, theming, responsive layout, accessibility, M3 Expressive, and compliance audits. Jetpack Compose is the primary implementation target, with secondary Flutter guidance and limited web coverage.
Which platforms does hamen/material-3-skill support?
Jetpack Compose is primary, Flutter is secondary, and web is limited. The README says Material Web is in maintenance mode and that M3 Expressive is not implemented on Web, so the platforms should not be treated as having equal feature coverage.
How does the MD3 compliance audit work in hamen/material-3-skill?
The README describes an audit mode that scores an app across 10 categories for Compose/Kotlin, Flutter/Dart, or web/CSS source trees. It does not document a scanner, command-line interface, output schema, or official certification process.
Official sources
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