# Safari Extension

> 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.

- **Type:** Skill
- **Install:** `agentstack add skill-abdullah4ai-apple-developer-toolkit-safari-extension`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [Abdullah4AI](https://agentstack.voostack.com/s/abdullah4ai)
- **Installs:** 0
- **Category:** [Web & Browser](https://agentstack.voostack.com/c/web-and-browser)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [Abdullah4AI](https://github.com/Abdullah4AI)
- **Source:** https://github.com/Abdullah4AI/apple-developer-toolkit/tree/main/swiftship/internal/skills/data/extensions/safari-extension

## Install

```sh
agentstack add skill-abdullah4ai-apple-developer-toolkit-safari-extension
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## 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: $(PRODUCT_MODULE_NAME).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.

- **Author:** [Abdullah4AI](https://github.com/Abdullah4AI)
- **Source:** [Abdullah4AI/apple-developer-toolkit](https://github.com/Abdullah4AI/apple-developer-toolkit)
- **License:** MIT

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

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-abdullah4ai-apple-developer-toolkit-safari-extension
- Seller: https://agentstack.voostack.com/s/abdullah4ai
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.