app-clips

A guide for building App Clips, which are small parts of an iOS app that open quickly from links, NFC tags, QR codes, Maps, or similar triggers.

In plain words
What is it for?
Use it when creating an App Clip, reading parameters from its launch URL, handling camera or location-related setup, or showing an App Store promotion.
Why use it?
It brings together the setup, invocation URL handling, permissions, size limit, and promotion of the full app in one workflow.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/abdullah4ai/apple-developer-toolkit/app-clips
Any agent
npx skills add Abdullah4AI/apple-developer-toolkit --skill app-clips
Clone the repo
git clone --depth 1 https://github.com/Abdullah4AI/apple-developer-toolkit

Made for: Claude Code, Codex.

Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 409 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5 $0.00067 $0.00409
Opus 5 $0.00034 $0.00204
Sonnet 5 $0.00013 $0.00082
Haiku 4.5 $0.00007 $0.00041

Measured 2d ago against content hash 992c659f99e8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

app-clips 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 2d 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.

swiftship/internal/skills/data/extensions/app-clips/SKILL.md · 44 lines

What it actually says

App Clips

APP CLIPS: SETUP: Requires separate App Clip target (kind: "app_clip" in plan extensions array). App Clips are a lightweight version of your app for quick, focused tasks.

INFO.PLIST (auto-configured on App Clip target in project.yml): NSAppClip dict with NSAppClipRequestEphemeralUserNotification and NSAppClipRequestLocationConfirmation is set automatically. No manual configuration needed.

ASSOCIATED DOMAINS (auto-configured in project.yml entitlements): appclips:{bundleID} and parent-application-identifiers are set automatically.

APP CLIP EXPERIENCE URL: Configure in App Store Connect. Users launch App Clip via NFC, QR code, Maps, etc.

APP CLIP INVOCATION (receive URL): struct AppClipApp: App { var body: some Scene { WindowGroup { ContentView() .onContinueUserActivity(NSUserActivityTypeBrowsingWeb) { activity in guard let url = activity.webpageURL else { return } // Handle URL: extract parameters, show relevant content } } } }

SKOverlay (promote full app from within App Clip): import StoreKit @Environment(.requestAppStoreOverlay) var requestOverlay Button("Get Full App") { requestOverlay(AppStoreOverlay.AppClipCompletion(appIdentifier: "YOUR_APP_ID")) }

CONSTRAINTS:

  • App Clip binary must be < 15 MB
  • No access to HealthKit, CallKit, SiriKit (use App Intents in full app)
  • Limited background modes
  • Use @AppStorage for lightweight persistence (no SwiftData)
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.

  1. 2d ago First seen · 44 lines · 67 tokens per session scan A 992c659f99e8

Subscribe to this mod's changes

app-clips is a skill published in the GitHub repository Abdullah4AI/apple-developer-toolkit (10 stars, last pushed 5d ago), licensed MIT. It adds 67 tokens to every session and 409 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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