# Google Objective C Style > Applies Google Objective-C style for formatting, naming, and conventions. Use when writing or reviewing Objective-C, ObjC, .m/.h files, Cocoa, or Apple platform code. - Skill: `peterish8/google-objective-c-style` (Agent Skill) - Install (CLI): `npx skillmds@latest add peterish8/google-objective-c-style` - Raw SKILL.md: https://api.skillmd.com/api/skills/peterish8/google-objective-c-style/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: peterish8 (https://skillmd.com/u/peterish8) - Updated: 2026-09-21 - Page: https://skillmd.com/skills/peterish8/google-objective-c-style --- # Google Objective-C Style (Quick Reference) Source: [https://google.github.io/styleguide/objcguide.html](https://google.github.io/styleguide/objcguide.html) ## When to load the detailed skill Read [google-objective-c-style-detailed](../google-objective-c-style-detailed/SKILL.md) when you need: - Section-by-section rules, examples, or edge cases - PR review with non-trivial style questions - Resolving conflicts between local habits and Google style The detailed skill is linked here so agents can load it automatically alongside this quick reference. ## Core rules - Optimize for the reader; be consistent with Apple SDK conventions. - 2-space indent. 80-column limit. Braces on same line. - Naming: `UpperCamelCase` classes; `lowerCamelCase` methods/variables. - Document all public interfaces with `/** */` comments adjacent to declarations. - Use `#import`, not `#include`. Order: own header, system, project. - Prefer properties (`@property`) over raw ivars; specify atomicity and memory. - Use `instancetype` for factory methods; `nullable`/`nonnull` annotations. ## Quick checklist - Match Google Objective-C naming and formatting conventions - Keep code readable; prefer consistency within the file and package - Run language-appropriate linters/formatters when available - Document non-obvious behavior with brief, accurate comments - Defer to the official guide when this skill is silent ## Official guide