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SKILL verified MIT Self-run

Safari Extension

skill-abdullah4ai-apple-developer-toolkit-safari-extension · by Abdullah4AI

Safari Web Extension: SFSafariExtensionHandler, content scripts, web resources, native-web messaging. Use when building a Safari browser extension, injecting content scripts into web pages, or communicating between native app and Safari. Triggers: Safari extension, SFSafariExtensionHandler, content script, browser extension.

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Install

$ agentstack add skill-abdullah4ai-apple-developer-toolkit-safari-extension

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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Reliability & compatibility

✓ Security review passed
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Declared compatibility

Claude CodeClaude Desktop

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

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About

Safari Extension

SAFARI WEB EXTENSION: SETUP: Requires separate extension target (kind: "safari" in plan extensions array). Safari Web Extensions use web technologies (JS/HTML/CSS) plus a native Swift wrapper.

SWIFT EXTENSION HANDLER (optional — for native communication): class SafariExtensionHandler: SFSafariExtensionHandler { // Called when toolbar button is clicked override func toolbarItemClicked(in window: SFSafariWindow) { window.getActiveTab { tab in tab?.getActivePage { page in page?.dispatchMessageToScript(withName: "buttonClicked", userInfo: [:]) } } }

// Receive messages from JavaScript content scripts override func messageReceived(withName messageName: String, from page: SFSafariPage, userInfo: [String: Any]?) { // Handle message from JS: page.dispatchMessageToExtension(...) } }

INFO.PLIST KEYS (extension): NSExtensionPrincipalClass: $(PRODUCTMODULENAME).SafariExtensionHandler NSExtensionAttributes: SFSafariWebsiteAccess: { Level: All }

WEB EXTENSION RESOURCES (in extension bundle):

  • manifest.json (Web Extension manifest v3)
  • background.js (service worker)
  • content.js (injected into pages)
  • popup.html (toolbar popup)

ENABLE IN SAFARI: User must enable in Safari → Settings → Extensions.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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