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Agent skill

Local Build

by Code-with-Beto in Code-with-Beto/skills

Build a release APK and a simulator .app file locally for a React Native Expo app using gradlew and xcodebuild.

No licenceAuto-check passedMobile

Install Local Build

skills CLI
$ npx skills add Code-with-Beto/skills --skill local-build -a claude-code

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

GitHub CLI
$ gh skill install Code-with-Beto/skills local-build --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/Code-with-Beto/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/cwb-local-build/skills/local-build .claude/skills/local-build && 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
local-build
GitHub stars
141
Token cost
~2k tokens
SKILL.md length
834 words
Files
1
Skills in repo
4
Repo updated
First seen
Licence
None found

At a glance

Build a release APK and a simulator .app file locally for a React Native Expo app using gradlew and xcodebuild.

  • Works in 7 steps: Confirm the project is a React Native /… → Read the app identity from the Expo config → Create the Android build script → …
  • The user wants to produce installable artifacts without EAS (for e2e testing
  • SKILL.md covers Overview, Step 0: Confirm the project is…, Step 1: Read the app identity… and Step 2: Create the Android…, plus 6 more sections
  • Calls xcrun, adb and npx

What it does

Local Build is an agent skill from Code-with-Beto/skills. Build a release APK and a simulator .app file locally for a React Native Expo app using gradlew and xcodebuild. Use when the user wants to produce installable artifacts without EAS (for e2e testing, sharing a build with a teammate, or quick iteration on a real device/simulator). Generates two shell scripts wired up to the user's actual app name, scheme, and bundle identifier.

Its SKILL.md is about 2k 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 Cross-platform mobile apps. It works with Expo, React Native, Xcode and iOS. The repository describes itself as: Agent Skills and plugins to help mobile devs ship better apps faster with AI assistance.

When your agent uses it

  • The user wants to produce installable artifacts without EAS (for e2e testing
  • Sharing a build with a teammate
  • Quick iteration on a real device/simulator)

Example prompts

  • “/local-build”

Requirements

  • Node.js

Workflow steps

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

  1. Confirm the project is a React Native / Expo app
  2. Read the app identity from the Expo config
  3. Create the Android build script
  4. Create the iOS build script
  5. Make the scripts executable
  6. Add builds/ to .gitignore
  7. Tell the user how to use them

What it can do on your machine

Read from SKILL.md and the folder at commit f35f3d9. 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

    Shell commands in SKILL.md call:

    • xcrun
    • adb
    • npx
    • xcodebuild
    • eas
    • expo

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    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

Local Build loads about 2k tokens when it runs. Until then it costs about 98 tokens; SKILL.md has 834 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~98
When it runs · the whole SKILL.md, loaded when a task matches
~2k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 834 words (~2,037 tokens).

“Generate two shell scripts that build release artifacts for an Expo / React Native project using the platform toolchains directly:”

— opening of SKILL.md by Code-with-Beto
name
local-build

Read the full SKILL.md on GitHub

Files

Just SKILL.md in plugins/cwb-local-build/skills/local-build of Code-with-Beto/skills.

Open the folder on GitHubat commit f35f3d9

Compare with similar skills

Local Build 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.

Local Build compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Local Build this skillCode-with-Beto/skills141—~2kAutomated safety check: PassNone
Mobile App Developerhappycapy-ai/Happycapy-skills137—~1.3kAutomated safety check: PassMIT
Expo Tailwind SetupCherryHQ/cherry-studio-app4k8 repos~3kAutomated safety check: PassMIT
Screenmapaleqsio/screenmap242—~7.2kAutomated safety check: PassMIT
Expo Brownfield Integrationmweinbach/agent-coworker1562 repos~900Automated safety check: NotesCustom licence
Expo UIarcboxlabs/linkcode156—~1.2kAutomated safety check: PassMIT

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Works with

Categories

Questions about Local Build

What does Local Build do?

Build a release APK and a simulator .app file locally for a React Native Expo app using gradlew and xcodebuild. Local Build is an agent skill from Code-with-Beto/skills.app file locally for a React Native Expo app using gradlew and xcodebuild.

When should I use Local Build?

Local Build fits situations like: the user wants to produce installable artifacts without EAS (for e2e testing; sharing a build with a teammate; quick iteration on a real device/simulator).

How do I install Local Build in Claude Code?

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

How do I install Local Build in Codex?

Run `npx skills add Code-with-Beto/skills --skill local-build -a codex`. Or copy the skill folder (plugins/cwb-local-build/skills/local-build in Code-with-Beto/skills) into .agents/skills/local-build in your project. Codex loads it when a task matches its description.

Can I use Local Build 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 Code-with-Beto/skills --skill local-build -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/local-build, .gemini/skills/local-build, .github/skills/local-build and .opencode/skills/local-build in your project.

What does Local Build need to run?

Going by SKILL.md and its folder, Local Build needs the command-line tools its instructions call (xcrun, adb, npx, xcodebuild, eas and expo). Our summary lists: Node.js.

Does Local Build access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Local Build 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 Local Build use?

No licence was found for Local Build or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Local Build use?

About 2k tokens (SKILL.md is roughly 8.1k 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 Local Build?

Skills that share tags, products or a category with Local Build: Mobile App Developer (happycapy-ai/Happycapy-skills, 137 stars), Expo Tailwind Setup (CherryHQ/cherry-studio-app, 4k stars), Screenmap (aleqsio/screenmap, 242 stars) and Expo Brownfield Integration (mweinbach/agent-coworker, 156 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Local Build?

Code-with-Beto (a GitHub organization) maintains it in Code-with-Beto/skills, which has 141 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on July 12, 2026.

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