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Agent skill

Composewebview Development

by parkwoocheol in parkwoocheol/compose-webview

Builds, tests, and formats ComposeWebView multiplatform library.

MITAuto-check passedMobile

Install Composewebview Development

skills CLI
$ npx skills add parkwoocheol/compose-webview --skill composewebview-development -a claude-code

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

GitHub CLI
$ gh skill install parkwoocheol/compose-webview composewebview-development --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/parkwoocheol/compose-webview.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/development .claude/skills/composewebview-development && 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
composewebview-development
GitHub stars
103
Token cost
~1.3k tokens
SKILL.md length
341 words
Files
9 (incl. scripts)
Skills in repo
3
Repo updated
First seen
Licence
MIT

At a glance

Builds, tests, and formats ComposeWebView multiplatform library.

  • Works in 5 steps: Define in Common: Add expect declaration… → Implement per Platform: Add actual… → Verify Completeness: Run platform status… → …
  • Running Spotless formatting
  • SKILL.md covers Quick Commands, Platform-Specific Workflows, Adding New Features and Code Templates, plus 5 more sections
  • Runs Shell scripts from its folder; calls bash and java

What it does

Composewebview Development is an agent skill from parkwoocheol/compose-webview. Builds, tests, and formats ComposeWebView multiplatform library. Handles Android, iOS, Desktop (JVM), and Web (JS) platforms. Use when building, testing, running Spotless formatting, or checking platform-specific code. Supports expect/actual pattern workflows.

Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 11 other files, including scripts (for example `reference/gradle_tasks.md`, `reference/platform_specifics.md` and `scripts/build_all.sh`).

It sits in Mobile, covering Android development. It works with Android, iOS, Jetpack Compose and Kotlin. The repository describes itself as: A powerful, flexible, and feature-rich WebView wrapper for Jetpack Compose and Compose Multiplatform (Android, iOS, Desktop, Web). The licence is MIT.

When your agent uses it

  • Running Spotless formatting
  • Checking platform-specific code

Example prompts

  • “/composewebview-development”

Requirements

  • A Bash shell

Workflow steps

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

  1. Define in Common: Add expect declaration in commonMain/kotlin/com/parkwoocheol/composewebview/
  2. Implement per Platform: Add actual implementation in each platform's source set
  3. Verify Completeness: Run platform status check
  4. Test: Run platform-specific tests
  5. Format: MUST run Spotless before committing

What it can do on your machine

Read from SKILL.md and the folder at commit 209044a. 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

    Ships 4 files in scripts/ (Shell), which the agent can run.

    Shell commands in SKILL.md call:

    • bash
    • java

    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

Composewebview Development loads about 1.3k tokens when it runs. Until then it costs about 72 tokens; SKILL.md has 341 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~72
When it runs · the whole SKILL.md, loaded when a task matches
~1.3k

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); the scripts in this folder are not scanned.

SKILL.md

The full file from parkwoocheol/compose-webview at commit 209044a, republished under its MIT licence (© parkwoocheol). 341 words, ~1,257 tokens.

Download SKILL.mdSave it as .claude/skills/composewebview-development/SKILL.md (or your agent's skills folder). This skill also uses 8 other files; get the full folder from GitHub.
name
composewebview-development
description
Builds, tests, and formats ComposeWebView multiplatform library. Handles Android, iOS, Desktop (JVM), and Web (JS) platforms. Use when building, testing, running Spotless formatting, or checking platform-specific code. Supports expect/actual pattern workflows.

ComposeWebView Development Workflow

This skill automates building, testing, and formatting for the ComposeWebView multiplatform library across Android, iOS, Desktop (JVM), Web (JS), and Web (WASM) platforms.

Quick Commands

Format Code (REQUIRED before commits)
bash
./gradlew spotlessApply
Run All Tests
bash
./gradlew :compose-webview:allTests
Build All Platforms
bash
bash .agents/skills/development/scripts/build_all.sh
Check Implementation Status
bash
bash .agents/skills/development/scripts/platform_status.sh

Platform-Specific Workflows

Android
bash
# Build
./gradlew :compose-webview:assembleDebug

# Test
./gradlew :compose-webview:testDebugUnitTest

# Lint
./gradlew lintDebug
iOS
bash
# Link (build)
./gradlew :compose-webview:linkIosSimulatorArm64

# Test
./gradlew :compose-webview:iosSimulatorArm64Test
Desktop (JVM)
bash
# Compile
./gradlew :compose-webview:compileKotlinDesktop

# Test
./gradlew :compose-webview:desktopTest
Web (JS)
bash
# Compile
./gradlew :compose-webview:compileKotlinJs

# Test
./gradlew :compose-webview:jsTest
Web (WASM)
bash
# Compile
./gradlew :compose-webview:compileKotlinWasmJs

# Test
./gradlew :compose-webview:wasmJsTest

Adding New Features

ComposeWebView uses the expect/actual pattern for multiplatform code. Follow these steps:

  1. Define in Common: Add expect declaration in commonMain/kotlin/com/parkwoocheol/composewebview/

    kotlin
    expect class PlatformFeature {
    fun doSomething(): String
}

  2. Implement per Platform: Add actual implementation in each platform's source set

    • androidMain/ - Android WebView implementation
    • iosMain/ - WKWebView implementation
    • desktopMain/ - CEF (Chromium Embedded Framework) implementation
    • jsMain/ - Web/JS implementation
    • wasmJsMain/ - WASM implementation

  3. Verify Completeness: Run platform status check

    bash
    bash .agents/skills/development/scripts/platform_status.sh

  4. Test: Run platform-specific tests

    bash
    bash .agents/skills/development/scripts/test_all.sh

  5. Format: MUST run Spotless before committing

    bash
    ./gradlew spotlessApply

See reference/platform_specifics.md for detailed platform patterns and constraints.

Code Templates

Creating expect/actual

Use the template: templates/ExpectActualTemplate.kt.template

Creating Composables

Use the template: templates/ComposableTemplate.kt.template

Gradle Tasks Reference

For a complete list of available Gradle tasks, see reference/gradle_tasks.md.

Common Tasks

Clean Build
bash
./gradlew clean
Build and Test Everything
bash
bash .agents/skills/development/scripts/test_all.sh
Check Code Formatting (without applying)
bash
bash .agents/skills/development/scripts/format_check.sh

Platform Constraints

iOS (WKWebView)
  • Limited zoom control
  • Strict security policies
  • Requires message handlers for JSBridge
Desktop (CEF via KCEF)
  • Asynchronous initialization required
  • SwingPanel integration
  • Platform-specific threading considerations
Show full SKILL.md (141 more words)Show less
Web (JS)
  • IFrame-based implementation
  • postMessage bridge for communication
  • Limited native features

See detailed constraints in reference/platform_specifics.md.

Scripts

This skill provides the following automation scripts:

  • build_all.sh: Builds all platforms sequentially with error handling
  • test_all.sh: Runs comprehensive test suite across all platforms
  • format_check.sh: Checks Spotless formatting (for CI/pre-commit hooks)
  • platform_status.sh: Reports expect/actual implementation completeness

All scripts are located in scripts/ and can be run from the project root.

Troubleshooting

Build Failures
  1. Clean Gradle cache: ./gradlew clean
  2. Invalidate caches: rm -rf .gradle
  3. Check Java version: java -version (should be 17+)
Test Failures
  1. Run specific platform tests to isolate issues
  2. Check platform-specific logs
  3. Verify all expect/actual pairs are implemented
Formatting Issues

Run ./gradlew spotlessApply to auto-fix formatting issues.

  • Architecture: See .agents/knowledge/architecture.md for design patterns
  • Commands: See .agents/knowledge/commands.md for workflow reference
  • Code Style: See .agents/knowledge/code_style.md for coding conventions

© parkwoocheol, 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 8 other files (scripts) in .agents/skills/development of parkwoocheol/compose-webview.

  • SKILL.md
  • reference/gradle_tasks.md
  • reference/platform_specifics.md
  • scripts/build_all.sh
  • scripts/format_check.sh
  • scripts/platform_status.sh
  • scripts/test_all.sh
  • templates/ComposableTemplate.kt.template
  • templates/ExpectActualTemplate.kt.template

Open the folder on GitHubat commit 209044a

Compare with similar skills

Composewebview Development 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.

Composewebview Development compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Composewebview Development this skillparkwoocheol/compose-webview103—~1.3kAutomated safety check: PassMIT
Ksafeioannisa/KSafe332—~17kAutomated safety check: PassApache-2.0
KtormonitorCosminMihuMDC/KtorMonitor254—~2.5kAutomated safety check: PassApache-2.0
Update Libs VersionsCosminMihuMDC/KtorMonitor254—~800Automated safety check: PassApache-2.0
Kotlin Androidericrisco/rsc-harness167—~2.9kAutomated safety check: PassMIT
Android Developmentdpconde/claude-android-skill336—~1.7kAutomated safety check: PassMIT

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Works with

Categories

Questions about Composewebview Development

What does Composewebview Development do?

Builds, tests, and formats ComposeWebView multiplatform library. Composewebview Development is an agent skill from parkwoocheol/compose-webview. Builds, tests, and formats ComposeWebView multiplatform library.

When should I use Composewebview Development?

Composewebview Development fits situations like: running Spotless formatting; checking platform-specific code.

How do I install Composewebview Development in Claude Code?

Run `npx skills add parkwoocheol/compose-webview --skill composewebview-development -a claude-code`. Or copy the skill folder (.agents/skills/development in parkwoocheol/compose-webview) into .claude/skills/composewebview-development in your project. Claude Code loads it when a task matches its description.

How do I install Composewebview Development in Codex?

Run `npx skills add parkwoocheol/compose-webview --skill composewebview-development -a codex`. Or copy the skill folder (.agents/skills/development in parkwoocheol/compose-webview) into .agents/skills/composewebview-development in your project. Codex loads it when a task matches its description.

Can I use Composewebview Development 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 parkwoocheol/compose-webview --skill composewebview-development -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/composewebview-development, .gemini/skills/composewebview-development, .github/skills/composewebview-development and .opencode/skills/composewebview-development in your project.

What does Composewebview Development need to run?

Going by SKILL.md and its folder, Composewebview Development needs a shell for the scripts in its folder and the command-line tools its instructions call (bash and java). Our summary lists: A Bash shell.

Does Composewebview Development 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 Composewebview Development 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Composewebview Development use?

Composewebview Development 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 Composewebview Development use?

About 1.3k tokens (SKILL.md is roughly 5k 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 Composewebview Development?

Skills that share tags, products or a category with Composewebview Development: Ksafe (ioannisa/KSafe, 332 stars), Ktormonitor (CosminMihuMDC/KtorMonitor, 254 stars), Update Libs Versions (CosminMihuMDC/KtorMonitor, 254 stars) and Kotlin Android (ericrisco/rsc-harness, 167 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Composewebview Development?

parkwoocheol (a GitHub user) maintains it in parkwoocheol/compose-webview, which has 103 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on August 28, 2026.

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