React Native Best Practices
vercel-labs/openreview
A prioritized rule set for React Native and Expo apps covering list performance, animation, navigation, UI patterns, state, rendering, monorepos and configuration.
Software Mansion's guide for migrating Expo SDK apps to Meta Quest using expo-horizon packages.
Install Expo Horizon
$ npx skills add software-mansion-labs/skills --skill expo-horizon -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install software-mansion-labs/skills expo-horizon --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/software-mansion-labs/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/expo-horizon .claude/skills/expo-horizon && 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 "expo-horizon" agent skill from https://github.com/software-mansion-labs/skills/tree/main/skills/expo-horizon into .claude/skills/expo-horizon/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "expo-horizon", 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/software-mansion-labs/skills/tree/main/skills/expo-horizonType 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 software-mansion-labs/skills --skill expo-horizon -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install software-mansion-labs/skills expo-horizon --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/software-mansion-labs/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/expo-horizon .agents/skills/expo-horizon && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "expo-horizon" agent skill from https://github.com/software-mansion-labs/skills/tree/main/skills/expo-horizon into .agents/skills/expo-horizon/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "expo-horizon", 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 software-mansion-labs/skills --skill expo-horizon -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install software-mansion-labs/skills expo-horizon --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/software-mansion-labs/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/expo-horizon .cursor/skills/expo-horizon && 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 "expo-horizon" agent skill from https://github.com/software-mansion-labs/skills/tree/main/skills/expo-horizon into .cursor/skills/expo-horizon/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "expo-horizon", 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/software-mansion-labs/skills.git --path skills/expo-horizon--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 software-mansion-labs/skills --skill expo-horizon -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install software-mansion-labs/skills expo-horizon --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/software-mansion-labs/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/expo-horizon .gemini/skills/expo-horizon && 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 "expo-horizon" agent skill from https://github.com/software-mansion-labs/skills/tree/main/skills/expo-horizon into .gemini/skills/expo-horizon/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "expo-horizon", 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 software-mansion-labs/skills expo-horizonInstalls 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 software-mansion-labs/skills --skill expo-horizon -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/software-mansion-labs/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/expo-horizon .github/skills/expo-horizon && 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 "expo-horizon" agent skill from https://github.com/software-mansion-labs/skills/tree/main/skills/expo-horizon into .github/skills/expo-horizon/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "expo-horizon", 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 software-mansion-labs/skills --skill expo-horizon -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install software-mansion-labs/skills expo-horizon --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/software-mansion-labs/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/expo-horizon .opencode/skills/expo-horizon && 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 "expo-horizon" agent skill from https://github.com/software-mansion-labs/skills/tree/main/skills/expo-horizon into .opencode/skills/expo-horizon/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "expo-horizon", 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
expo-horizon- GitHub stars
- 291
- Token cost
- ~2.8k tokens
- SKILL.md length
- 1,022 words
- Files
- 1
- Skills in repo
- 20
- Repo updated
- First seen
- Licence
- None found
At a glance
Software Mansion's guide for migrating Expo SDK apps to Meta Quest using expo-horizon packages.
- Works in 5 steps: Install and configure expo-horizon-core. → Detect existing location / notification… → For each detected package, ask the user… → …
- Adding Meta Quest
- SKILL.md covers Decision Tree, Setup Workflow (adding Quest…, Critical Rules and Official References
- Calls npx and npm
What it does
Expo Horizon is an agent skill from software-mansion-labs/skills. Software Mansion's guide for migrating Expo SDK apps to Meta Quest using expo-horizon packages. Use when adding Meta Quest or Meta Horizon OS support to an existing Expo or React Native project. Trigger on: Meta Quest, Horizon OS, Quest 2, Quest 3, Quest 3S, VR app, expo-horizon-core, expo-horizon-location, expo-horizon-notifications, build flavors for Quest, panel sizing, VR headtracking, Horizon App ID, quest build variant, isHorizonDevice, isHorizonBuild, migrate expo-location to Quest, migrate…
Its SKILL.md is about 2.8k 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 and React Native. The repository describes itself as: Software Mansion's set of skills for AI-assisted React Native development.
When your agent uses it
- Adding Meta Quest
- Meta Horizon OS support to an existing Expo
- React Native project
- Expo-horizon-core
Example prompts
- “/expo-horizon”
Requirements
- Node.js
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Install and configure expo-horizon-core.
- Detect existing location / notification packages. Do NOT install the horizon equivalents yet.
- For each detected package, ask the user before migrating.
- Only after the user confirms, perform the migration for the approved package(s)
- If the user declines a migration, leave the original package untouched and note in the summary that feature X (location / notifications)…
What it can do on your machine
Read from SKILL.md and the folder at commit e3f00cd. 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:
npxnpm
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):
github.comdevelopers.meta.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
Expo Horizon loads about 2.8k tokens when it runs. Until then it costs about 160 tokens; SKILL.md has 1,022 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,022 words (~2,768 tokens).
“Software Mansion's production guide for adding Meta Quest support to Expo apps using the expo-horizon packages.”
- name
- expo-horizon
Files
Just SKILL.md in skills/expo-horizon of software-mansion-labs/skills.
Open the folder on GitHubat commit e3f00cd
Compare with similar skills
Expo Horizon 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 |
|---|---|---|---|---|---|---|
| Expo Horizon this skillsoftware-mansion-labs/skills | 291 | — | ~2.8k | Automated safety check: Pass | None | |
| React Native Best Practicesvercel-labs/openreview | 1.7k | 17 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Appllama App Design SkillAppllama/appllama-skills | 2.5k | 1 repos | ~5k | Automated safety check: Pass | MIT | |
| Appllama UsageAppllama/appllama-skills | 2.5k | 1 repos | ~1.6k | Automated safety check: Pass | MIT | |
| Release Sample SweepAtmosphere/atmosphere | 3.8k | — | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| App Store Reviewsafaiyeh/app-store-review-skill | 368 | 1 repos | ~3.4k | Automated safety check: Pass | MIT |
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- Official
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Use the Appllama MCP (mcp.appllama.io) well — research real top-grossing mobile apps, their screens, flows, and UI elements, then build from what you learn.
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Related
Works with
Categories
Questions about Expo Horizon
What does Expo Horizon do?
Software Mansion's guide for migrating Expo SDK apps to Meta Quest using expo-horizon packages. Expo Horizon is an agent skill from software-mansion-labs/skills. Software Mansion's guide for migrating Expo SDK apps to Meta Quest using expo-horizon packages.
When should I use Expo Horizon?
Expo Horizon fits situations like: adding Meta Quest; meta Horizon OS support to an existing Expo; React Native project; expo-horizon-core.
How do I install Expo Horizon in Claude Code?
Run `npx skills add software-mansion-labs/skills --skill expo-horizon -a claude-code`. Or copy the skill folder (skills/expo-horizon in software-mansion-labs/skills) into .claude/skills/expo-horizon in your project. Claude Code loads it when a task matches its description.
How do I install Expo Horizon in Codex?
Run `npx skills add software-mansion-labs/skills --skill expo-horizon -a codex`. Or copy the skill folder (skills/expo-horizon in software-mansion-labs/skills) into .agents/skills/expo-horizon in your project. Codex loads it when a task matches its description.
Can I use Expo Horizon 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 software-mansion-labs/skills --skill expo-horizon -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/expo-horizon, .gemini/skills/expo-horizon, .github/skills/expo-horizon and .opencode/skills/expo-horizon in your project.
What does Expo Horizon need to run?
Going by SKILL.md and its folder, Expo Horizon needs the command-line tools its instructions call (npx and npm). Our summary lists: Node.js.
Does Expo Horizon access the network?
SKILL.md names 2 domains. As links in the text: github.com and developers.meta.com. This is read from the text; nothing was executed.
Is Expo Horizon 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 Expo Horizon use?
No licence was found for Expo Horizon or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Expo Horizon use?
About 2.8k tokens (SKILL.md is roughly 11k 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 Expo Horizon?
Skills that share tags, products or a category with Expo Horizon: React Native Best Practices (vercel-labs/openreview, 1.7k stars), Appllama App Design Skill (Appllama/appllama-skills, 2.5k stars), Appllama Usage (Appllama/appllama-skills, 2.5k stars) and Release Sample Sweep (Atmosphere/atmosphere, 3.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Expo Horizon?
software-mansion-labs (a GitHub organization) maintains it in software-mansion-labs/skills, which has 291 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on September 28, 2026.
Source: software-mansion-labs/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.