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Agent skill

Coding Best Practices

by gustavscirulis in gustavscirulis/snapgrid

Reviews Swift/iOS code for adherence to modern Swift idioms, Apple platform best practices, architecture patterns, and code quality standards.

Custom licenceAuto-check passedDevelopment

Install Coding Best Practices

skills CLI
$ npx skills add gustavscirulis/snapgrid --skill coding-best-practices -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install gustavscirulis/snapgrid coding-best-practices --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/skills/ios/coding-best-practices .claude/skills/coding-best-practices && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
coding-best-practices
GitHub stars
117
Used in
1 other repo
Token cost
~1.9k tokens
SKILL.md length
563 words
Files
5
Skills in repo
118
Repo updated
First seen
Licence
Custom licence

At a glance

Reviews Swift/iOS code for adherence to modern Swift idioms, Apple platform best practices, architecture patterns, and code quality standards.

  • Works in 4 steps: Identify Scope → Load Reference Patterns → Review Categories → …
  • User mentions best practices
  • SKILL.md covers When This Skill Activates, Review Process, Review Checklist and Example Review Output, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Coding Best Practices is an agent skill from gustavscirulis/snapgrid. Reviews Swift/iOS code for adherence to modern Swift idioms, Apple platform best practices, architecture patterns, and code quality standards. Use when user mentions best practices, code review, clean code, refactoring, or wants to improve code quality.

Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files (for example `architecture-patterns.md`, `coredata-patterns.md` and `swift-patterns.md`).

It sits in Development, covering iOS development, Code quality and Software architecture. It works with iOS and SwiftUI. The repository describes itself as: SnapGrid is an open-source Mac app for collecting, organizing, and analyzing UI screenshots. It uses AI to automatically detect UI components and patterns, making it a powerful…

When your agent uses it

  • User mentions best practices
  • Wants to improve code quality

Example prompts

  • “Use the coding-best-practices skill to review Swift/iOS code for adherence to modern Swift idioms, Apple platform best practices, architecture…”
  • “/coding-best-practices”

Requirements

  • Pre-approved tools (allowed-tools): Read, Glob, Grep

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Identify Scope
  2. Load Reference Patterns
  3. Review Categories
  4. Review Output Format

What it can do on your machine

Read from SKILL.md and the folder at commit eb7eaf4. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Glob
    • Grep

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are swift).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • developer.apple.com
    • swift.org
    • docs.swift.org

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Coding Best Practices loads about 1.9k tokens when it runs. Until then it costs about 69 tokens; SKILL.md has 563 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~69
When it runs · the whole SKILL.md, loaded when a task matches
~1.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 563 words (~1,905 tokens).

“Reviews Swift/iOS code for adherence to modern Swift idioms, Apple platform best practices, architecture patterns, and code quality standards.”

— opening of SKILL.md by gustavscirulis, Custom licence
name
coding-best-practices
allowed-tools
Read, Glob, Grep

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files in .claude/skills/skills/ios/coding-best-practices of gustavscirulis/snapgrid.

  • SKILL.md
  • architecture-patterns.md
  • coredata-patterns.md
  • swift-patterns.md
  • swiftui-patterns.md

Open the folder on GitHubat commit eb7eaf4

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in gustavscirulis/snapgrid, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Coding Best Practices next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Coding Best Practices compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Coding Best Practices this skillgustavscirulis/snapgrid1171 repos~1.9kAutomated safety check: PassCustom licence
Coding Best PracticesKartikLabhshetwar/better-shot2.4k2 repos~1.8kAutomated safety check: PassCustom licence
Code Review SkillRain-kl/OpenFlare288—~2.3kAutomated safety check: NotesMIT
Reviewing Changesbitwarden/ios695—~1.1kAutomated safety check: PassGPL-3.0
macOS DevelopmentKartikLabhshetwar/better-shot2.4k2 repos~735Automated safety check: PassCustom licence
iOS Reviewplayer-ui/player101—~1.6kAutomated safety check: PassMIT

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Works with

Categories

Questions about Coding Best Practices

What does Coding Best Practices do?

Reviews Swift/iOS code for adherence to modern Swift idioms, Apple platform best practices, architecture patterns, and code quality standards. Coding Best Practices is an agent skill from gustavscirulis/snapgrid. Reviews Swift/iOS code for adherence to modern Swift idioms, Apple platform best practices, architecture patterns, and code quality standards.

When should I use Coding Best Practices?

Coding Best Practices fits situations like: user mentions best practices; wants to improve code quality.

How do I install Coding Best Practices in Claude Code?

Run `npx skills add gustavscirulis/snapgrid --skill coding-best-practices -a claude-code`. Or copy the skill folder (.claude/skills/skills/ios/coding-best-practices in gustavscirulis/snapgrid) into .claude/skills/coding-best-practices in your project. Claude Code loads it when a task matches its description.

How do I install Coding Best Practices in Codex?

Run `npx skills add gustavscirulis/snapgrid --skill coding-best-practices -a codex`. Or copy the skill folder (.claude/skills/skills/ios/coding-best-practices in gustavscirulis/snapgrid) into .agents/skills/coding-best-practices in your project. Codex loads it when a task matches its description.

Can I use Coding Best Practices in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add gustavscirulis/snapgrid --skill coding-best-practices -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/coding-best-practices, .gemini/skills/coding-best-practices, .github/skills/coding-best-practices and .opencode/skills/coding-best-practices in your project.

What does Coding Best Practices need to run?

SKILL.md names no scripts, command-line tools or credentials: Coding Best Practices is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Glob, Grep.

Does Coding Best Practices access the network?

SKILL.md names 3 domains. As links in the text: developer.apple.com, swift.org and docs.swift.org. This is read from the text; nothing was executed.

Is Coding Best Practices safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Coding Best Practices use?

Coding Best Practices has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Coding Best Practices use?

About 1.9k tokens (SKILL.md is roughly 7.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Coding Best Practices?

Skills that share tags, products or a category with Coding Best Practices: Coding Best Practices (KartikLabhshetwar/better-shot, 2.4k stars), Code Review Skill (Rain-kl/OpenFlare, 288 stars), Reviewing Changes (bitwarden/ios, 695 stars) and macOS Development (KartikLabhshetwar/better-shot, 2.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Coding Best Practices?

gustavscirulis (a GitHub user) maintains it in gustavscirulis/snapgrid, which has 117 GitHub stars. The repository holds 118 skills in this directory. The repository was last updated on April 30, 2026.

Source: gustavscirulis/snapgrid on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.