Is the Coding Rules skill free?

Yes. The skill itself is free from shinpr/agentic-code. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Coding Rules SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install Coding Rules?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Coding Rules with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Coding Rules

Concrete clean-code ruleset: 2-param max, no error suppression, early returns, YAGNI.

by shinpr · shinpr/agentic-code

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 14, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 9a47277

Reviewing a deliberately messy 6-parameter function against the ruleset caught a silent catch(e){}, two undocumented magic numbers, and the 6 positional params a generic review glossed over, then produced a compliant object-param, early-return rewrite.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What Coding Rules does

Applies a specific, opinionated clean-code ruleset while writing, reviewing, or refactoring code: 0-2 function parameters (structured objects beyond that), an absolute rule against error suppression with layer-specific handling, YAGNI, early returns over deep nesting, and small single-responsibility functions. Includes a TypeScript-specific reference covering unknown+type guards, the satisfies operator, const assertions, and branded types. Triggers when writing functions, handling errors, refactoring, or reviewing code style.

How to install Coding Rules

git clone https://github.com/shinpr/agentic-code
cd agentic-code
mkdir -p ~/.claude/skills
cp -r .agents/skills/coding-rules ~/.claude/skills/coding-rules

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Coding Rules

/coding-rules Concrete clean-code ruleset: 2-param max, no error suppression, early returns, YAGNI.

It also activates on plain-language prompts like these:

Refactor this function to use early returns instead of nesting
Review this code against our clean-code ruleset
Split this function's five parameters into a structured object

Frequently asked questions

Is the Coding Rules skill free?: Yes. The skill itself is free from shinpr/agentic-code. SkillProof publishes the install command and an independent test verdict at no cost.
Does Coding Rules work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 14, 2026. Verdict: Tested · Works. Reviewing a deliberately messy 6-parameter function against the ruleset caught a silent catch(e){}, two undocumented magic numbers, and the 6 positional params a generic review glossed over, then produced a compliant object-param, early-return rewrite.
What is the Coding Rules SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install Coding Rules?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Coding Rules with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.