Apple & Swift Documentation Lookup

Your training data covers older Apple APIs well but is often stale or missing for recent releases (iOS/macOS 26, Liquid Glass, the newest SwiftUI). Fetch ground truth with the built-in tools below — no scripts, nothing to install.

Load the tools you need up front. This skill uses WebFetch, WebSearch, and Grep. Any that are deferred, load via ToolSearch first (e.g. select:WebFetch,WebSearch). If the Grep tool isn't available this session, use rg (or grep -r) via Bash with the same flags.

Route by what's being asked — this matters:

• Explain / how does it work / show examples / read the docs or HIG → WebFetch the DocC JSON (recipe 2): it has Apple's official prose and code examples. Do NOT local-grep for this (interfaces have signatures, not examples), and do NOT grep the user's own project for Apple's docs.
• Exact signature / availability / does a specific API exist / since-which-version → local SDK grep (recipe 1).
• What's NEW in a framework (any release) → WebFetch the curated Updates changelog (recipe 2; grouped by year — June 2025 = iOS/macOS 26) — don't brute-force grep the SDK. For SDK-27 SwiftUI specifically, the swiftui-whats-new-27 skill's references are richer; for 26-era adoption guides, apple-api-updates.
• Find a WWDC video → recipe 3. Why a Swift feature exists → recipe 4.