npx skills add sickn33/agentic-awesome-skills --skill swift --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Swift: Idiomatic Efficiency Reference ## When to Use - Use this skill when the task matches this description: Language-specific super-code guidelines for swift. ## Table of Contents 1. [Optionals](#optionals) 2. [Collections & Functional Transforms](#collections) 3. [Value vs Reference Types](#value-types) 4. [Error Handling](#errors) 5. [Concurrency](#concurrency) 6. [Protocol-Oriented Design](#protocols) 7. [Anti-patterns specific to Swift](#antipatterns) --- ## 1. Optionals {#optionals} ```swift // ❌ Force unwrap let name = user.name! // ✅ — guard or if-let guard let name = user.name else { return } ``` ```swift // ❌ Nested if-let pyramid if let user = fetchUser() { if let address = user.address { if let city = address.city { display(city) } } } // ✅ — chained optional binding if let city = fetchUser()?.address?.city { display(city) } // or guard-let for early exit guard let city = fetchUser()?.address?.city else { return } display(city) ``` ```swift // ❌ Ternary for default let name = user.name != nil ? user.name! : "Unknown" // ✅ let name = user.name ?? "Unknown" ``` ```swift // ❌ Optional map when if-let is clearer for side effects user.name.map { display($0) } // ✅ — map f
- When to Use
- Table of Contents
- 1. Optionals {#optionals}
- 2. Collections & Functional Transforms {#collections}
- 3. Value vs Reference Types {#value-types}
- 4. Error Handling {#errors}
- 5. Concurrency {#concurrency}
- 6. Protocol-Oriented Design {#protocols}
- 7. Anti-patterns specific to Swift {#antipatterns}
- Limitations
What does the swift skill do?
Language-specific super-code guidelines for swift.
How do I install it?
Run `npx skills add sickn33/agentic-awesome-skills --skill swift --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From sickn33/agentic-awesome-skills, a repository with 44,414 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.