Agent skill

Maui Theming

by davidortinau in davidortinau/maui-skills

Guide for theming .NET MAUI apps—light/dark mode support, AppThemeBinding, dynamic resources, ResourceDictionary theme switching, and system theme detection.

MITAuto-check passedFrontend & Design

Install Maui Theming

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-theming -a claude-code

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

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-theming --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/davidortinau/maui-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/maui-skills/skills/maui-theming .claude/skills/maui-theming && 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/

Paste into Claude Code

Install the "maui-theming" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-theming into .claude/skills/maui-theming/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-theming", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-theming

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-theming -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-theming --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/maui-skills/skills/maui-theming .agents/skills/maui-theming && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "maui-theming" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-theming into .agents/skills/maui-theming/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-theming", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-theming -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-theming --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/maui-skills/skills/maui-theming .cursor/skills/maui-theming && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "maui-theming" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-theming into .cursor/skills/maui-theming/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-theming", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/davidortinau/maui-skills.git --path plugins/maui-skills/skills/maui-theming

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-theming -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-theming --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/maui-skills/skills/maui-theming .gemini/skills/maui-theming && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "maui-theming" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-theming into .gemini/skills/maui-theming/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-theming", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-theming

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-theming -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/maui-skills/skills/maui-theming .github/skills/maui-theming && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "maui-theming" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-theming into .github/skills/maui-theming/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-theming", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add davidortinau/maui-skills --skill maui-theming -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install davidortinau/maui-skills maui-theming --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/davidortinau/maui-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/maui-skills/skills/maui-theming .opencode/skills/maui-theming && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "maui-theming" agent skill from https://github.com/davidortinau/maui-skills/tree/main/plugins/maui-skills/skills/maui-theming into .opencode/skills/maui-theming/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "maui-theming", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: maui-theming
GitHub stars: 175
Token cost: ~739 tokens
SKILL.md length: 171 words
Files: 2 (incl. references)
Skills in repo: 41
Repo updated: Jul 6, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Guide for theming .NET MAUI apps—light/dark mode support, AppThemeBinding, dynamic resources, ResourceDictionary theme switching, and system theme detection.

AppThemeBinding
SKILL.md covers Choosing your approach, Critical gotchas and Quick reference
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Theme switching

What it does

Maui Theming is an agent skill from davidortinau/maui-skills. Guide for theming .NET MAUI apps—light/dark mode support, AppThemeBinding, dynamic resources, ResourceDictionary theme switching, and system theme detection. USE FOR: "dark mode", "light mode", "theming", "AppThemeBinding", "theme switching", "ResourceDictionary theme", "dynamic resources", "system theme detection", "color scheme", "app theme". DO NOT USE FOR: localization or language switching (use maui-localization), accessibility visual adjustments (use maui-accessibility), or app icons (use…

Its SKILL.md is about 740 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/theming-api.md`).

It sits in Frontend & Design, covering Theming and dark mode and Cross-platform mobile apps. The repository describes itself as: .NET MAUI skills for GitHub Copilot and Claude Code. The licence is MIT.

When your agent uses it

AppThemeBinding
Theme switching
ResourceDictionary theme
Dynamic resources

Example prompts

“dark mode”
“light mode”
“theming”
“/maui-theming”

What it can do on your machine

Read from SKILL.md and the folder at commit 79bb4bf. 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 (its code samples are csharp and xml).
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

Maui Theming loads about 739 tokens when it runs, and up to ~1.7k if it reads all its reference files. Until then it costs about 134 tokens; SKILL.md has 171 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~134
When it runs · the whole SKILL.md, loaded when a task matches: ~739
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~1.7k

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 davidortinau/maui-skills at commit 79bb4bf, republished under its MIT licence (© davidortinau). 171 words, ~739 tokens.

Download SKILL.mdSave it as .claude/skills/maui-theming/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: maui-theming
description: Guide for theming .NET MAUI apps—light/dark mode support, AppThemeBinding, dynamic resources, ResourceDictionary theme switching, and system theme detection. USE FOR: "dark mode", "light mode", "theming", "AppThemeBinding", "theme switching", "ResourceDictionary theme", "dynamic resources", "system theme detection", "color scheme", "app theme". DO NOT USE FOR: localization or language switching (use maui-localization), accessibility visual adjustments (use maui-accessibility), or app icons (use maui-app-icons-splash).

.NET MAUI Theming

Choosing your approach

Approach	Best for	Limitation
AppThemeBinding	Auto light/dark with OS — minimal code	Only two themes (light + dark)
ResourceDictionary swap	Custom branded themes, >2 themes, user preference	More setup, must use `DynamicResource` everywhere
Both combined	Auto OS response + custom theme colors	Most flexible but most complex

Critical gotchas

Android: ConfigChanges.UiMode is REQUIRED

MainActivity must include ConfigChanges.UiMode or theme change events will not fire and the activity restarts instead of handling the change:

csharp

[Activity(Theme = "@style/Maui.SplashTheme",
          MainLauncher = true,
          ConfigurationChanges = ConfigChanges.ScreenSize
                               | ConfigChanges.Orientation
                               | ConfigChanges.UiMode  // ← Required for theme detection
                               | ConfigChanges.ScreenLayout
                               | ConfigChanges.SmallestScreenSize
                               | ConfigChanges.Density)]
public class MainActivity : MauiAppCompatActivity { }

Without UiMode, toggling dark mode in Android settings causes a full activity restart — losing navigation state and appearing as a crash to users.

CSS themes cannot be swapped at runtime

MAUI supports CSS styling, but CSS-based themes cannot be swapped dynamically. Use ResourceDictionary theming for runtime switching.

DynamicResource vs StaticResource

When using ResourceDictionary theme switching, you must use DynamicResource:

xml

<!-- ✅ Updates when theme dictionary changes -->
<Label TextColor="{DynamicResource PrimaryTextColor}" />

<!-- ❌ Frozen at first load — won't update on theme switch -->
<Label TextColor="{StaticResource PrimaryTextColor}" />

Quick reference

OS light/dark → AppThemeBinding markup extension
Theme colors in C# → SetAppThemeColor(), SetAppTheme<T>()
Read OS theme → Application.Current.RequestedTheme
Force theme → Application.Current.UserAppTheme = AppTheme.Dark
Theme changes → RequestedThemeChanged event
Custom switching → Swap ResourceDictionary in MergedDictionaries
Runtime bindings → DynamicResource (not StaticResource)

Files

SKILL.md and 1 other file (references) in plugins/maui-skills/skills/maui-theming of davidortinau/maui-skills.

SKILL.md
references/theming-api.md

Open the folder on GitHubat commit 79bb4bf

Compare with similar skills

Maui Theming 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.

Maui Theming compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Maui Theming this skilldavidortinau/maui-skills	175	—	~739	Automated safety check: Pass	MIT	3 mo ago
Material 3hamen/material-3-skill	1.5k	2 repos	~7.8k	Automated safety check: Pass	MIT	2 mo ago
Maui Themingdotnet/skills	5.6k	1 repos	~4.1k	Automated safety check: Pass	MIT	yesterday
Monochromatic UIsickn33/agentic-awesome-skills	47k	1 repos	~2.7k	Automated safety check: Pass	MIT	yesterday
UniwindOhh-889/skyroc	795	—	~1.4k	Automated safety check: Pass	MIT	1 mo ago
Flutter Theming Appsbtwld/superdeck	130	—	~1.9k	Automated safety check: Pass	BSD-3-Clause	yesterday

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Questions about Maui Theming

What does Maui Theming do?

Guide for theming .NET MAUI apps—light/dark mode support, AppThemeBinding, dynamic resources, ResourceDictionary theme switching, and system theme detection. Maui Theming is an agent skill from davidortinau/maui-skills.NET MAUI apps—light/dark mode support, AppThemeBinding, dynamic resources, ResourceDictionary theme switching, and system theme detection.

When should I use Maui Theming?

Maui Theming fits situations like: appThemeBinding; theme switching; resourceDictionary theme; dynamic resources.

How do I install Maui Theming in Claude Code?

Run `npx skills add davidortinau/maui-skills --skill maui-theming -a claude-code`. Or copy the skill folder (plugins/maui-skills/skills/maui-theming in davidortinau/maui-skills) into .claude/skills/maui-theming in your project. Claude Code loads it when a task matches its description.

How do I install Maui Theming in Codex?

Run `npx skills add davidortinau/maui-skills --skill maui-theming -a codex`. Or copy the skill folder (plugins/maui-skills/skills/maui-theming in davidortinau/maui-skills) into .agents/skills/maui-theming in your project. Codex loads it when a task matches its description.

Can I use Maui Theming 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 davidortinau/maui-skills --skill maui-theming -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/maui-theming, .gemini/skills/maui-theming, .github/skills/maui-theming and .opencode/skills/maui-theming in your project.

What does Maui Theming need to run?

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

Does Maui Theming 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 Maui Theming 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 Maui Theming use?

Maui Theming 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 Maui Theming use?

About 739 tokens (SKILL.md is roughly 3k 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 1k tokens, read only when the agent opens those files.

What are the alternatives to Maui Theming?

Skills that share tags, products or a category with Maui Theming: Material 3 (hamen/material-3-skill, 1.5k stars), Maui Theming (dotnet/skills, 5.6k stars), Monochromatic UI (sickn33/agentic-awesome-skills, 47k stars) and Uniwind (Ohh-889/skyroc, 795 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Maui Theming?

davidortinau (a GitHub user) maintains it in davidortinau/maui-skills, which has 175 GitHub stars. The repository holds 41 skills in this directory. The repository was last updated on July 6, 2026.

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

Install Maui Theming

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

.NET MAUI Theming

Choosing your approach

Critical gotchas

Android: ConfigChanges.UiMode is REQUIRED

CSS themes cannot be swapped at runtime

DynamicResource vs StaticResource

Quick reference

Files

Compare with similar skills

Similar skills

More from davidortinau/maui-skills

Related

Questions about Maui Theming