Agent skill

Android Viewmodel

by new-silvermoon in new-silvermoon/awesome-android-agent-skills

Best practices for implementing Android ViewModels using Kotlin 2.3+ Explicit Backing Fields, StateFlow for UI state, and SharedFlow for one-off events.

Apache-2.0Auto-check passedMobile

Install Android Viewmodel

skills CLI

$ npx skills add new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a claude-code

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

GitHub CLI

$ gh skill install new-silvermoon/awesome-android-agent-skills android-viewmodel --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/new-silvermoon/awesome-android-agent-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.github/skills/architecture/android-viewmodel .claude/skills/android-viewmodel && 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 "android-viewmodel" agent skill from https://github.com/new-silvermoon/awesome-android-agent-skills/tree/main/.github/skills/architecture/android-viewmodel into .claude/skills/android-viewmodel/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "android-viewmodel", 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/new-silvermoon/awesome-android-agent-skills/tree/main/.github/skills/architecture/android-viewmodel

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 new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a codex

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

GitHub CLI

$ gh skill install new-silvermoon/awesome-android-agent-skills android-viewmodel --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/new-silvermoon/awesome-android-agent-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.github/skills/architecture/android-viewmodel .agents/skills/android-viewmodel && 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 "android-viewmodel" agent skill from https://github.com/new-silvermoon/awesome-android-agent-skills/tree/main/.github/skills/architecture/android-viewmodel into .agents/skills/android-viewmodel/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "android-viewmodel", 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 new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a cursor

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

GitHub CLI

$ gh skill install new-silvermoon/awesome-android-agent-skills android-viewmodel --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/new-silvermoon/awesome-android-agent-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.github/skills/architecture/android-viewmodel .cursor/skills/android-viewmodel && 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 "android-viewmodel" agent skill from https://github.com/new-silvermoon/awesome-android-agent-skills/tree/main/.github/skills/architecture/android-viewmodel into .cursor/skills/android-viewmodel/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "android-viewmodel", 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/new-silvermoon/awesome-android-agent-skills.git --path .github/skills/architecture/android-viewmodel

--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 new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a gemini-cli

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

GitHub CLI

$ gh skill install new-silvermoon/awesome-android-agent-skills android-viewmodel --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/new-silvermoon/awesome-android-agent-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.github/skills/architecture/android-viewmodel .gemini/skills/android-viewmodel && 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 "android-viewmodel" agent skill from https://github.com/new-silvermoon/awesome-android-agent-skills/tree/main/.github/skills/architecture/android-viewmodel into .gemini/skills/android-viewmodel/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "android-viewmodel", 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 new-silvermoon/awesome-android-agent-skills android-viewmodel

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 new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/new-silvermoon/awesome-android-agent-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/.github/skills/architecture/android-viewmodel .github/skills/android-viewmodel && 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 "android-viewmodel" agent skill from https://github.com/new-silvermoon/awesome-android-agent-skills/tree/main/.github/skills/architecture/android-viewmodel into .github/skills/android-viewmodel/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "android-viewmodel", 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 new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -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 new-silvermoon/awesome-android-agent-skills android-viewmodel --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/new-silvermoon/awesome-android-agent-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.github/skills/architecture/android-viewmodel .opencode/skills/android-viewmodel && 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 "android-viewmodel" agent skill from https://github.com/new-silvermoon/awesome-android-agent-skills/tree/main/.github/skills/architecture/android-viewmodel into .opencode/skills/android-viewmodel/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "android-viewmodel", 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: android-viewmodel
GitHub stars: 972
Used in: 1 other repo
Token cost: ~1k tokens
SKILL.md length: 309 words
Files: 1
Skills in repo: 2
Repo updated: Jul 27, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Best practices for implementing Android ViewModels using Kotlin 2.3+ Explicit Backing Fields, StateFlow for UI state, and SharedFlow for one-off events.

Works in 7 steps: UI State (StateFlow) → One-Off Events (SharedFlow) → Collecting in Compose → …
Tasks that involve Android development
SKILL.md covers Instructions, 1. UI State (StateFlow), 2. One-Off Events (SharedFlow) and 3. Collecting in Compose, plus 4 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Android Viewmodel is an agent skill from new-silvermoon/awesome-android-agent-skills. Best practices for implementing Android ViewModels using Kotlin 2.3+ Explicit Backing Fields, StateFlow for UI state, and SharedFlow for one-off events.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Mobile, covering Android development. It works with Android and Kotlin. The repository describes itself as: A collection of standardized Agent Skills to teach GitHub Copilot, Claude, Gemini and Cursor about modern Android development (Kotlin, Jetpack Compose, etc.). The licence is Apache-2.0.

When your agent uses it

Tasks that involve Android development

Example prompts

“/android-viewmodel”

Workflow steps

7 steps, taken from the step headings in SKILL.md.

UI State (StateFlow)
One-Off Events (SharedFlow)
Collecting in Compose
Collecting in XML/View System
Coroutine Scope
State Design
Best Practices

What it can do on your machine

Read from SKILL.md and the folder at commit 82900ea. 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 kotlin).
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

Android Viewmodel loads about 1k tokens when it runs. Until then it costs about 43 tokens; SKILL.md has 309 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~43
When it runs · the whole SKILL.md, loaded when a task matches: ~1k

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 new-silvermoon/awesome-android-agent-skills at commit 82900ea, republished under its Apache-2.0 licence (© new-silvermoon). 309 words, ~1,039 tokens.

Download SKILL.mdSave it as .claude/skills/android-viewmodel/SKILL.md (or your agent's skills folder).

name: android-viewmodel
description: Best practices for implementing Android ViewModels using Kotlin 2.3+ Explicit Backing Fields, StateFlow for UI state, and SharedFlow for one-off events.

Android ViewModel & State Management

Instructions

Use ViewModel to own UI state and business logic. It should survive configuration changes and expose immutable APIs.

Kotlin 2.3+

Prefer Explicit Backing Fields instead of the traditional _state/state backing property pattern.

Kotlin 2.3: Experimental (-Xexplicit-backing-fields)

Kotlin 2.4+: Stable (recommended)

Avoid creating duplicate backing properties unless targeting older Kotlin versions.

1. UI State (StateFlow)

Purpose

Represents the persistent UI state.

Examples:

Loading
Success(data)
Error(message)
Empty

Declaration

Use an explicit backing field.

kotlin

val uiState: StateFlow<UiState>
    field = MutableStateFlow(UiState.Loading)

The backing field is mutable (MutableStateFlow) while consumers only see StateFlow.

Updating State

Prefer update { } for atomic updates.

kotlin

_uiState.update { old ->
    old.copy(isLoading = false)
}

With explicit backing fields:

kotlin

uiState.update {
    it.copy(isLoading = false)
}

You may also assign directly when appropriate.

kotlin

uiState.value = UiState.Success(data)

2. One-Off Events (SharedFlow)

Purpose

Use for transient events that should not survive recomposition or configuration changes.

Examples:

Navigate
Show Snackbar
Show Toast
Open Dialog
Request Permissions

Declaration

kotlin

val uiEvent: SharedFlow<UiEvent>
    field = MutableSharedFlow(
        replay = 0,
        extraBufferCapacity = 1
    )

replay = 0 ensures events are not replayed after recreation.

Using extraBufferCapacity = 1 is recommended for UI events sent with tryEmit().

Sending Events

Suspend:

kotlin

uiEvent.emit(UiEvent.NavigateBack)

Non-suspending:

kotlin

uiEvent.tryEmit(UiEvent.ShowSnackbar("Saved"))

3. Collecting in Compose

StateFlow

Always collect lifecycle-aware.

kotlin

val state by viewModel.uiState.collectAsStateWithLifecycle()

SharedFlow

Collect inside a single LaunchedEffect.

kotlin

LaunchedEffect(Unit) {
    viewModel.uiEvent.collect { event ->
        when (event) {
            is UiEvent.NavigateBack -> { /* ... */ }
            is UiEvent.ShowSnackbar -> { /* ... */ }
        }
    }
}

Do not collect SharedFlow with collectAsState().

4. Collecting in XML/View System

Use lifecycle-aware collection.

kotlin

lifecycleScope.launch {
    repeatOnLifecycle(Lifecycle.State.STARTED) {
        viewModel.uiState.collect {
            render(it)
        }
    }
}

Likewise for events.

kotlin

lifecycleScope.launch {
    repeatOnLifecycle(Lifecycle.State.STARTED) {
        viewModel.uiEvent.collect(::handleEvent)
    }
}

5. Coroutine Scope

Launch all ViewModel work in viewModelScope.

kotlin

viewModelScope.launch {
    repository.refresh()
}

Business logic should preferably be delegated to UseCases or Repositories.

6. State Design

Represent the entire screen with a single immutable state object.

kotlin

data class UiState(
    val isLoading: Boolean = false,
    val items: List<Item> = emptyList(),
    val error: String? = null
)

Avoid exposing multiple unrelated StateFlows for one screen unless they truly have different lifecycles.

7. Best Practices

Expose immutable APIs (StateFlow, SharedFlow)

Prefer Explicit Backing Fields (Kotlin 2.4+)

Use immutable UI state

Use update {} when modifying state

Keep one-off events in SharedFlow

Keep business logic out of Composables

Use collectAsStateWithLifecycle()

Use repeatOnLifecycle() in Views

Launch work in viewModelScope

Do not expose MutableStateFlow

Do not use StateFlow for navigation events

Do not use SharedFlow for persistent screen state

Do not keep duplicate _state properties when Explicit Backing Fields are available

Files

Just SKILL.md in .github/skills/architecture/android-viewmodel of new-silvermoon/awesome-android-agent-skills.

Open the folder on GitHubat commit 82900ea

Used in 1 other repository

We found 3 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in new-silvermoon/awesome-android-agent-skills, which our catalogue first saw on October 7, 2026.

hanamizuki/solopreneurskills/android-dev/viewmodel plugins/codex/android-dev/skills/viewmodel+1 more

Compare with similar skills

Android Viewmodel 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.

Android Viewmodel compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Android Viewmodel this skillnew-silvermoon/awesome-android-agent-skills	972	1 repos	~1k	Automated safety check: Pass	Apache-2.0	2 mo ago
Android Hidden API and R8 Checkgkd-kit/gkd	43k	—	~1.5k	Automated safety check: Pass	GPL-3.0	yesterday
Compose Multiplatform Patternsmonta-app/ocpp-emulator	180	5 repos	~2k	Automated safety check: Pass	Apache-2.0	6 days ago
Android Developmentdpconde/claude-android-skill	336	—	~1.7k	Automated safety check: Pass	MIT	10 mo ago
Architecture Overclocknekomangaorg/Neko	2.8k	—	~1.4k	Automated safety check: Pass	Apache-2.0	today
Claude Android NinjaDrjacky/claude-android-ninja	124	—	~5.2k	Automated safety check: Pass	Apache-2.0	8 days ago

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Questions about Android Viewmodel

What does Android Viewmodel do?

Best practices for implementing Android ViewModels using Kotlin 2.3+ Explicit Backing Fields, StateFlow for UI state, and SharedFlow for one-off events. Android Viewmodel is an agent skill from new-silvermoon/awesome-android-agent-skills.3+ Explicit Backing Fields, StateFlow for UI state, and SharedFlow for one-off events.

When should I use Android Viewmodel?

Android Viewmodel fits situations like: tasks that involve Android development.

How do I install Android Viewmodel in Claude Code?

Run `npx skills add new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a claude-code`. Or copy the skill folder (.github/skills/architecture/android-viewmodel in new-silvermoon/awesome-android-agent-skills) into .claude/skills/android-viewmodel in your project. Claude Code loads it when a task matches its description.

How do I install Android Viewmodel in Codex?

Run `npx skills add new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a codex`. Or copy the skill folder (.github/skills/architecture/android-viewmodel in new-silvermoon/awesome-android-agent-skills) into .agents/skills/android-viewmodel in your project. Codex loads it when a task matches its description.

Can I use Android Viewmodel 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 new-silvermoon/awesome-android-agent-skills --skill android-viewmodel -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/android-viewmodel, .gemini/skills/android-viewmodel, .github/skills/android-viewmodel and .opencode/skills/android-viewmodel in your project.

What does Android Viewmodel need to run?

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

Does Android Viewmodel 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 Android Viewmodel 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 Android Viewmodel use?

Android Viewmodel is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Android Viewmodel use?

About 1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Android Viewmodel?

Skills that share tags, products or a category with Android Viewmodel: Android Hidden API and R8 Check (gkd-kit/gkd, 43k stars), Compose Multiplatform Patterns (monta-app/ocpp-emulator, 180 stars), Android Development (dpconde/claude-android-skill, 336 stars) and Architecture Overclock (nekomangaorg/Neko, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Android Viewmodel?

new-silvermoon (a GitHub user) maintains it in new-silvermoon/awesome-android-agent-skills, which has 972 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on July 27, 2026.

Source: new-silvermoon/awesome-android-agent-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 Android Viewmodel

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Android ViewModel & State Management

Instructions

1. UI State (StateFlow)

Purpose

Declaration

Updating State

2. One-Off Events (SharedFlow)

Purpose

Declaration

Sending Events

3. Collecting in Compose

StateFlow

SharedFlow

4. Collecting in XML/View System

5. Coroutine Scope

6. State Design

7. Best Practices

Files

Used in 1 other repository

Compare with similar skills

Similar skills

Android Hidden API and R8 Check

Compose Multiplatform Patterns

Android Development

Architecture Overclock

Claude Android Ninja

Expo Brownfield Integration

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Questions about Android Viewmodel