SFSymbolsKit

Use when generating, validating, or fixing Apple SFSymbol names in Swift, SwiftUI, UIKit, or AppKit. Grounds symbol usage against the real catalog (SFSymbolsKit, SFSymbols 7.2, 7,007 symbols) so you emit typed, compile-checked accessors instead of hallucinated stringly-typed systemName: values.

SFSymbolsKit — grounded SFSymbols for Swift

Apple's SFSymbol APIs (Image(systemName:), UIImage(systemName:), NSImage(systemSymbolName:)) take a String. A wrong name compiles and ships a blank icon — there is no compiler or runtime error. Models routinely emit plausible but non-existent names. This skill makes you ground every SFSymbol against the real catalog.

Hard rule

Never emit a raw guessed systemName: / systemSymbolName: string. Every SFSymbol you produce must be verified against the bundled manifest first.

The catalog

{baseDir}/symbols.json is the authoritative manifest: an object with count, sfsymbolsVersion, and symbols: [{ "name", "property" }], generated from SFSymbolsKit's source (the same data as https://sfsymbolskit.com/symbols.json). name is the dotted system name (square.and.arrow.up); property is the typed SFSymbolsKit accessor (squareAndArrowUp).

Procedure

1. Load {baseDir}/symbols.json.
2. Resolve the symbol the user wants:
   • Exact: match their input against name (dotted) or property (camelCase), case-insensitively, ignoring ./-/_/space.
   • Search: if they describe it ("trash", "arrow up"), filter symbols whose name/property contains the normalized query; prefer prefix matches; offer the top candidates.
3. If the requested name is not in symbols, it is not a real SFSymbol. Do not invent or "fix" it by guessing — choose the closest real entry from the manifest and say so.
4. Emit the typed SFSymbolsKit accessors for the resolved property:
   • SwiftUI: Image(systemName: String.SFSymbols.<property>)
   • UIKit: UIImage.SFSymbols.<property>
   • AppKit: NSImage.SFSymbols.<property>
   • Enum: SFSymbol.<property> (.allCases is CaseIterable)
5. If the project doesn't depend on SFSymbolsKit yet, add it: .package(url: "https://github.com/WikipediaBrown/SFSymbolsKit.git", from: "1.0.0") then import SFSymbolsKit.

Name transform (for reasoning, not for guessing)

Dotted → camelCase: drop the dots, camel-case each segment (square.and.arrow.up → squareAndArrowUp, gearshape.fill → gearshapeFill). Leading digits and Swift keywords are special-cased in the catalog — always trust symbols.json's property, never a transform you computed, when they could differ.

If a SFSymbolsKit MCP server is available

Prefer its tools over manual lookup: resolve_sf_symbol (validate a candidate; returns the canonical accessors or valid:false + suggestions), search_sf_symbols, sf_symbol_usage. Fall back to {baseDir}/symbols.json when the MCP server is not connected.

Why

This converts the one error class you cannot self-correct (a stringly-typed symbol that compiles but renders nothing) into a verified, typed reference. Source & docs: https://sfsymbolskit.com.