Android Development
dpconde/claude-android-skill
Create production-quality Android applications following Google's official architecture guidance and NowInAndroid best practices.
A skill your agent uses when writing or changing any class, object, function, property, or constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module —…
Install Modularization
$ npx skills add rcosteira79/android-skills --skill modularization -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install rcosteira79/android-skills modularization --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/rcosteira79/android-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/android-skills/skills/modularization .claude/skills/modularization && rm -rf skills-srcUse ~/.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/
Install the "modularization" agent skill from https://github.com/rcosteira79/android-skills/tree/main/plugins/android-skills/skills/modularization into .claude/skills/modularization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modularization", 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 install https://github.com/rcosteira79/android-skills/tree/main/plugins/android-skills/skills/modularizationType 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.
$ npx skills add rcosteira79/android-skills --skill modularization -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install rcosteira79/android-skills modularization --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rcosteira79/android-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/android-skills/skills/modularization .agents/skills/modularization && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "modularization" agent skill from https://github.com/rcosteira79/android-skills/tree/main/plugins/android-skills/skills/modularization into .agents/skills/modularization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modularization", 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.
$ npx skills add rcosteira79/android-skills --skill modularization -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install rcosteira79/android-skills modularization --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rcosteira79/android-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/android-skills/skills/modularization .cursor/skills/modularization && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "modularization" agent skill from https://github.com/rcosteira79/android-skills/tree/main/plugins/android-skills/skills/modularization into .cursor/skills/modularization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modularization", 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 https://github.com/rcosteira79/android-skills.git --path plugins/android-skills/skills/modularization--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add rcosteira79/android-skills --skill modularization -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install rcosteira79/android-skills modularization --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rcosteira79/android-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/android-skills/skills/modularization .gemini/skills/modularization && rm -rf skills-srcUse ~/.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/
Install the "modularization" agent skill from https://github.com/rcosteira79/android-skills/tree/main/plugins/android-skills/skills/modularization into .gemini/skills/modularization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modularization", 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.
$ gh skill install rcosteira79/android-skills modularizationInstalls 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).
$ npx skills add rcosteira79/android-skills --skill modularization -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/rcosteira79/android-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/android-skills/skills/modularization .github/skills/modularization && rm -rf skills-srcUse ~/.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/
Install the "modularization" agent skill from https://github.com/rcosteira79/android-skills/tree/main/plugins/android-skills/skills/modularization into .github/skills/modularization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modularization", 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.
$ npx skills add rcosteira79/android-skills --skill modularization -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install rcosteira79/android-skills modularization --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rcosteira79/android-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/android-skills/skills/modularization .opencode/skills/modularization && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "modularization" agent skill from https://github.com/rcosteira79/android-skills/tree/main/plugins/android-skills/skills/modularization into .opencode/skills/modularization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modularization", 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
modularization- GitHub stars
- 150
- Token cost
- ~403 tokens
- SKILL.md length
- 156 words
- Files
- 1
- Skills in repo
- 21
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when writing or changing any class, object, function, property, or constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module —…
- Changing any class
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module — :app
What it does
Modularization is an agent skill from rcosteira79/android-skills. Use when writing or changing any class, object, function, property, or constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module — :app, :core:, :feature:, :data, etc.). Symptoms — a top-level declaration left at Kotlin's default public visibility; an implementation class, mapper, helper, constant, or UI-state holder reachable from another module though only used within its own; reaching for public "because the caller needs it"; "should this be public or internal?".
Its SKILL.md is about 400 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 Kotlin, Gradle and Android. The repository describes itself as: Claude Code skills for Android & KMP development. The licence is MIT.
When your agent uses it
- Changing any class
- Constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module — :app
Example prompts
- “because the caller needs it”
- “should this be public or internal?”
- “/modularization”
What it can do on your machine
Read from SKILL.md and the folder at commit 0f9af5a. 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
Modularization loads about 403 tokens when it runs. Until then it costs about 133 tokens; SKILL.md has 156 words of instructions outside code blocks.
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 rcosteira79/android-skills at commit 0f9af5a, republished under its MIT licence (© rcosteira79). 156 words, ~403 tokens.
Download SKILL.mdSave it as
.claude/skills/modularization/SKILL.md (or your agent's skills folder).- name
- modularization
- description
- Use when writing or changing any class, object, function, property, or constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module — :app, :core:*, :feature:*, :data, etc.). Symptoms — a top-level declaration left at Kotlin's default public visibility; an implementation class, mapper, helper, constant, or UI-state holder reachable from another module though only used within its own; reaching for public "because the caller needs it"; "should this be public or internal?".
Modularization
Declare everything at the lowest visibility that still compiles. Start private; widen to internal only when another file in the same module needs it; widen to public only when a different module actually consumes it. Kotlin defaults to public, and in a multi-module project that default is usually wrong — a public symbol joins the module's API surface: it leaks implementation across the boundary and you are then obliged to keep it stable.
- Public interface as the module's API → the interface is
public; its implementation class staysinternal(DI-bound, never named from another module). - Mapper / helper / extension / constant / UI-state holder used only inside the module →
internal(orprivateif a single file uses it). "Rendered by a composable in this module" does not requirepublic—internalis visible to the whole module. - Member used only within its class →
private.
Widening a symbol to public is a decision, not a default: confirm a real cross-module consumer first.
© rcosteira79, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in plugins/android-skills/skills/modularization of rcosteira79/android-skills.
Open the folder on GitHubat commit 0f9af5a
Compare with similar skills
Modularization 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Modularization this skillrcosteira79/android-skills | 150 | — | ~403 | Automated safety check: Pass | MIT | |
| Android Developmentdpconde/claude-android-skill | 336 | — | ~1.7k | Automated safety check: Pass | MIT | |
| Claude Android NinjaDrjacky/claude-android-ninja | 124 | — | ~5.2k | Automated safety check: Pass | Apache-2.0 | |
| Expo Brownfield Integrationmweinbach/agent-coworker | 156 | 2 repos | ~900 | Automated safety check: Notes | Custom licence | |
| Build Foremannekomangaorg/Neko | 2.8k | — | ~807 | Automated safety check: Pass | Apache-2.0 | |
| Android Audio E2Ehyochan/react-native-nitro-sound | 961 | — | ~814 | Automated safety check: Pass | MIT |
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mweinbach/agent-coworker
Helps add Expo and React Native to an existing native iOS or Android app, and choose between a prebuilt AAR or XCFramework and a fully integrated build.
Build Foreman
nekomangaorg/Neko
Optimizes Gradle build scripts, compilation times, and Android Studio sync performance.
Android Audio E2E
hyochan/react-native-nitro-sound
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Load, when a developer writes, reviews, or debugs Kotlin coroutine code and needs help spotting concurrency bugs — GlobalScope leaks, runBlocking in suspend, missing Flow catch, hardcoded or wrong…
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Related
Categories
Questions about Modularization
What does Modularization do?
A skill your agent uses when writing or changing any class, object, function, property, or constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module —…. Modularization is an agent skill from rcosteira79/android-skills.).
When should I use Modularization?
Modularization fits situations like: changing any class; constant in a multi-module Android/Kotlin project (settings.gradle(.kts) includes more than one module — :app.
How do I install Modularization in Claude Code?
Run `npx skills add rcosteira79/android-skills --skill modularization -a claude-code`. Or copy the skill folder (plugins/android-skills/skills/modularization in rcosteira79/android-skills) into .claude/skills/modularization in your project. Claude Code loads it when a task matches its description.
How do I install Modularization in Codex?
Run `npx skills add rcosteira79/android-skills --skill modularization -a codex`. Or copy the skill folder (plugins/android-skills/skills/modularization in rcosteira79/android-skills) into .agents/skills/modularization in your project. Codex loads it when a task matches its description.
Can I use Modularization 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 rcosteira79/android-skills --skill modularization -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/modularization, .gemini/skills/modularization, .github/skills/modularization and .opencode/skills/modularization in your project.
What does Modularization need to run?
SKILL.md names no scripts, command-line tools or credentials: Modularization is instructions for the agent only.
Does Modularization 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 Modularization 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 Modularization use?
Modularization 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 Modularization use?
About 403 tokens (SKILL.md is roughly 1.6k 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 Modularization?
Skills that share tags, products or a category with Modularization: Android Development (dpconde/claude-android-skill, 336 stars), Claude Android Ninja (Drjacky/claude-android-ninja, 124 stars), Expo Brownfield Integration (mweinbach/agent-coworker, 156 stars) and Build Foreman (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 Modularization?
rcosteira79 (a GitHub user) maintains it in rcosteira79/android-skills, which has 150 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on September 19, 2026.
Source: rcosteira79/android-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.