npx skills add sickn33/agentic-awesome-skills --skill dart --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.
# Dart: Idiomatic Efficiency Reference ## When to Use - Use this skill when the task matches this description: Language-specific super-code guidelines for dart. ## Table of Contents 1. [Null Safety](#nulls) 2. [Collections & Iteration](#collections) 3. [Classes & Records](#classes) 4. [Async/Await & Streams](#async) 5. [Error Handling](#errors) 6. [Flutter-Specific Patterns](#flutter) 7. [Anti-patterns specific to Dart](#antipatterns) --- ## 1. Null Safety {#nulls} ```dart // ❌ Manual null check String display; if (user.name != null) { display = user.name!; } else { display = 'Unknown'; } // ✅ final display = user.name ?? 'Unknown'; ``` ```dart // ❌ Nested null checks if (user != null && user.address != null && user.address!.city != null) { print(user.address!.city!); } // ✅ final city = user?.address?.city; if (city != null) print(city); ``` ```dart // ❌ Late field when nullable is correct late String name; // crashes if accessed before assignment // ✅ — use late only when you guarantee initialization before access String? name; // honestly nullable // late is fine for: late final _controller = TextEditingController(); ``` ```dart // ❌ Bang operator (!) everywhere final name = use
- When to Use
- Table of Contents
- 1. Null Safety {#nulls}
- 2. Collections & Iteration {#collections}
- 3. Classes & Records {#classes}
- 4. Async/Await & Streams {#async}
- 5. Error Handling {#errors}
- 6. Flutter-Specific Patterns {#flutter}
- 7. Anti-patterns specific to Dart {#antipatterns}
- Limitations
What does the dart skill do?
Language-specific super-code guidelines for dart.
How do I install it?
Run `npx skills add sickn33/agentic-awesome-skills --skill dart --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.