Claude Android Ninja
Drjacky/claude-android-ninja
Build and migrate Android apps with Kotlin, Jetpack Compose, MVVM, Hilt, Room 3 (KSP, SQLiteDriver, Flow/suspend DAOs), Navigation3, and multi-module Gradle.
USE THIS when writing or reviewing Jetpack Compose / Kotlin code in packages/cds-android or apps/android-app - @Composable APIs, Modifier parameters, CompositionLocal, state hoisting, or naming.
Install Jetpack Best Practices
$ npx skills add coinbase/cds --skill jetpack-best-practices -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install coinbase/cds jetpack-best-practices --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/coinbase/cds.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/jetpack-best-practices .claude/skills/jetpack-best-practices && 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 "jetpack-best-practices" agent skill from https://github.com/coinbase/cds/tree/master/.claude/skills/jetpack-best-practices into .claude/skills/jetpack-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jetpack-best-practices", 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/coinbase/cds/tree/master/.claude/skills/jetpack-best-practicesType 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 coinbase/cds --skill jetpack-best-practices -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install coinbase/cds jetpack-best-practices --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/coinbase/cds.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/jetpack-best-practices .agents/skills/jetpack-best-practices && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "jetpack-best-practices" agent skill from https://github.com/coinbase/cds/tree/master/.claude/skills/jetpack-best-practices into .agents/skills/jetpack-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jetpack-best-practices", 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 coinbase/cds --skill jetpack-best-practices -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install coinbase/cds jetpack-best-practices --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/coinbase/cds.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/jetpack-best-practices .cursor/skills/jetpack-best-practices && 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 "jetpack-best-practices" agent skill from https://github.com/coinbase/cds/tree/master/.claude/skills/jetpack-best-practices into .cursor/skills/jetpack-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jetpack-best-practices", 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/coinbase/cds.git --path .claude/skills/jetpack-best-practices--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 coinbase/cds --skill jetpack-best-practices -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install coinbase/cds jetpack-best-practices --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/coinbase/cds.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/jetpack-best-practices .gemini/skills/jetpack-best-practices && 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 "jetpack-best-practices" agent skill from https://github.com/coinbase/cds/tree/master/.claude/skills/jetpack-best-practices into .gemini/skills/jetpack-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jetpack-best-practices", 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 coinbase/cds jetpack-best-practicesInstalls 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 coinbase/cds --skill jetpack-best-practices -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/coinbase/cds.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/jetpack-best-practices .github/skills/jetpack-best-practices && 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 "jetpack-best-practices" agent skill from https://github.com/coinbase/cds/tree/master/.claude/skills/jetpack-best-practices into .github/skills/jetpack-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jetpack-best-practices", 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 coinbase/cds --skill jetpack-best-practices -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install coinbase/cds jetpack-best-practices --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/coinbase/cds.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/jetpack-best-practices .opencode/skills/jetpack-best-practices && 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 "jetpack-best-practices" agent skill from https://github.com/coinbase/cds/tree/master/.claude/skills/jetpack-best-practices into .opencode/skills/jetpack-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jetpack-best-practices", 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
jetpack-best-practices- GitHub stars
- 506
- Token cost
- ~805 tokens
- SKILL.md length
- 395 words
- Files
- 2 (incl. references)
- Skills in repo
- 11
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
USE THIS when writing or reviewing Jetpack Compose / Kotlin code in packages/cds-android or apps/android-app - @Composable APIs, Modifier parameters, CompositionLocal, state hoisting, or naming.
- Tasks that involve Android development
- SKILL.md covers How the requirement levels…, The rules that come up most in…, Boundary rules specific to CDS… and Related reading
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Jetpack Best Practices is an agent skill from coinbase/cds. USE THIS when writing or reviewing Jetpack Compose / Kotlin code in packages/cds-android or apps/android-app - @Composable APIs, Modifier parameters, CompositionLocal, state hoisting, or naming. Not for React or React Native work.
Its SKILL.md is about 810 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/compose-api-guidelines.md`).
It sits in Mobile, covering Android development. It works with Android, Jetpack Compose, Kotlin and React. The repository describes itself as: Coinbase Design System.
When your agent uses it
- Tasks that involve Android development
Example prompts
- “/jetpack-best-practices”
What it can do on your machine
Read from SKILL.md and the folder at commit 46d9e48. 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
Links to these hosts (documentation or services it may open):
android.googlesource.com
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
Jetpack Best Practices loads about 805 tokens when it runs, and up to ~12k if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 395 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 395 words (~805 tokens).
“references/compose-api-guidelines.md is the official AOSP Compose API guidelines document, vendored verbatim. Read it before writing or reviewing a Compose API. It is the authority here; do not invent house style that contradicts it, and do not paraphrase it from memory.”
- name
- jetpack-best-practices
Files
SKILL.md and 1 other file (references) in .claude/skills/jetpack-best-practices of coinbase/cds.
- SKILL.md
- references/compose-api-guidelines.md
Open the folder on GitHubat commit 46d9e48
Compare with similar skills
Jetpack Best Practices 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 |
|---|---|---|---|---|---|---|
| Jetpack Best Practices this skillcoinbase/cds | 506 | — | ~805 | Automated safety check: Pass | Custom licence | |
| Claude Android NinjaDrjacky/claude-android-ninja | 124 | — | ~5.2k | Automated safety check: Pass | Apache-2.0 | |
| Clerk Androidgeekskai/blog | 103 | 1 repos | ~2.1k | Automated safety check: Pass | MIT | |
| Upgrade React NativeShopify/flash-list | 7.2k | — | ~1.9k | Automated safety check: Pass | MIT | |
| Compose Multiplatform Patternsmonta-app/ocpp-emulator | 180 | 5 repos | ~2k | Automated safety check: Pass | Apache-2.0 | |
| Android Developmentdpconde/claude-android-skill | 336 | — | ~1.7k | Automated safety check: Pass | MIT |
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Compose Multiplatform Patterns
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Android Development
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Create production-quality Android applications following Google's official architecture guidance and NowInAndroid best practices.
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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.
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Related
Categories
Questions about Jetpack Best Practices
What does Jetpack Best Practices do?
USE THIS when writing or reviewing Jetpack Compose / Kotlin code in packages/cds-android or apps/android-app - @Composable APIs, Modifier parameters, CompositionLocal, state hoisting, or naming. Jetpack Best Practices is an agent skill from coinbase/cds. USE THIS when writing or reviewing Jetpack Compose / Kotlin code in packages/cds-android or apps/android-app - @Composable APIs, Modifier parameters, CompositionLocal, state hoisting, or naming.
When should I use Jetpack Best Practices?
Jetpack Best Practices fits situations like: tasks that involve Android development.
How do I install Jetpack Best Practices in Claude Code?
Run `npx skills add coinbase/cds --skill jetpack-best-practices -a claude-code`. Or copy the skill folder (.claude/skills/jetpack-best-practices in coinbase/cds) into .claude/skills/jetpack-best-practices in your project. Claude Code loads it when a task matches its description.
How do I install Jetpack Best Practices in Codex?
Run `npx skills add coinbase/cds --skill jetpack-best-practices -a codex`. Or copy the skill folder (.claude/skills/jetpack-best-practices in coinbase/cds) into .agents/skills/jetpack-best-practices in your project. Codex loads it when a task matches its description.
Can I use Jetpack Best Practices 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 coinbase/cds --skill jetpack-best-practices -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/jetpack-best-practices, .gemini/skills/jetpack-best-practices, .github/skills/jetpack-best-practices and .opencode/skills/jetpack-best-practices in your project.
What does Jetpack Best Practices need to run?
SKILL.md names no scripts, command-line tools or credentials: Jetpack Best Practices is instructions for the agent only.
Does Jetpack Best Practices access the network?
SKILL.md names 1 domain. As links in the text: android.googlesource.com. This is read from the text; nothing was executed.
Is Jetpack Best Practices 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 Jetpack Best Practices use?
Jetpack Best Practices has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Jetpack Best Practices use?
About 805 tokens (SKILL.md is roughly 3.2k 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 11k tokens, read only when the agent opens those files.
What are the alternatives to Jetpack Best Practices?
Skills that share tags, products or a category with Jetpack Best Practices: Claude Android Ninja (Drjacky/claude-android-ninja, 124 stars), Clerk Android (geekskai/blog, 103 stars), Upgrade React Native (Shopify/flash-list, 7.2k stars) and Compose Multiplatform Patterns (monta-app/ocpp-emulator, 180 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Jetpack Best Practices?
coinbase (a GitHub organization) maintains it in coinbase/cds, which has 506 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 6, 2026.
Source: coinbase/cds on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.