What is expo-ui-swift-ui?

A package that lets Expo mobile apps use SwiftUI views, which are Apple's native interface components, alongside React Native code. It applies only to Expo SDK 55 according to the description.

Installing the package, embedding SwiftUI component trees in an Expo app, applying SwiftUI modifiers, and placing React Native components inside SwiftUI layouts.

It allows developers to use SwiftUI interface features without building the entire app outside Expo. It also gives guidance for the native rebuild required after installation.

How praveenjuge/teak configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to praveenjuge/teak. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/praveenjuge/teak/main/.agents/skills/expo-ui-swift-ui/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/praveenjuge/teak

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/praveenjuge/teak/expo-ui-swift-ui/github.svg)](https://agentmods.dev/skills/praveenjuge/teak/expo-ui-swift-ui)

Your own site

<a href="https://agentmods.dev/skills/praveenjuge/teak/expo-ui-swift-ui"><img src="https://agentmods.dev/badge/skills/praveenjuge/teak/expo-ui-swift-ui/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/praveenjuge/teak/expo-ui-swift-ui"><img src="https://agentmods.dev/badge/skills/praveenjuge/teak/expo-ui-swift-ui.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 408 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00027	$0.00408
Opus 5	$0.00014	$0.00204
Sonnet 5	$0.00005	$0.00082
Haiku 4.5	$0.00003	$0.00041

Measured 12d ago against content hash a35450a1ce15, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

expo-ui-swift-ui scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to expo-ui-swift-ui — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/expo-ui-swift-ui/SKILL.md · 40 lines

What it actually says

The instructions in this skill apply to SDK 55 only. For other SDK versions, refer to the Expo UI SwiftUI docs for that version for the most accurate information.

Installation

npx expo install @expo/ui

A native rebuild is required after installation (npx expo run:ios).

Instructions

Expo UI's API mirrors SwiftUI's API. Use SwiftUI knowledge to decide which components or modifiers to use.
Components are imported from @expo/ui/swift-ui, modifiers from @expo/ui/swift-ui/modifiers.
When about to use a component, fetch its docs to confirm the API - https://docs.expo.dev/versions/v55.0.0/sdk/ui/swift-ui/{component-name}/index.md
When unsure about a modifier's API, refer to the docs - https://docs.expo.dev/versions/v55.0.0/sdk/ui/swift-ui/modifiers/index.md
Every SwiftUI tree must be wrapped in Host.
RNHostView is specifically for embedding RN components inside a SwiftUI tree. Example:

import { Host, VStack, RNHostView } from "@expo-ui/swift-ui";
import { Pressable } from "react-native";

<Host matchContents>
  <VStack>
    <RNHostView matchContents>
      // Here, `Pressable` is an RN component so it is wrapped in `RNHostView`.
      <Pressable />
    </RNHostView>
  </VStack>
</Host>;

If a required modifier or View is missing in Expo UI, it can be extended via a local Expo module. See: https://docs.expo.dev/guides/expo-ui-swift-ui/extending/index.md. Confirm with the user before extending.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

12d ago First seen · 40 lines · 27 tokens per session scan A a35450a1ce15

Subscribe to this mod's changes

expo-ui-swift-ui is a skill published in the GitHub repository praveenjuge/teak (24 stars, last pushed yesterday), licensed MIT. It adds 27 tokens to every session and 408 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to expo-ui-swift-ui, differing in 2 lines, and is treated as a copy.

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teak: Skill for Claude Code