Is the Coding Standards skill free?

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

What is the Coding Standards SkillProof Score?

8.4/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 6/10, docs & honesty 5/5.

How do I install Coding Standards?

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 Standards 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 Standards

Language-agnostic anti-pattern, type-safety, and test-first standards for reviews and refactors

by shinpr · shinpr/ai-coding-project-boilerplate

Works with setup

Install — copy the command Download source ↗

Test report

Verdict: Works with setup
Score: 8.4/10
Tested: Jul 31, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 3bebf27

⚠ The author changed this skill after we tested it. The verdict below describes the version we ran on Jul 31, 2026; it's queued for a re-test.

Fetched SKILL.md at .claude/skills-en/coding-standards/; frontmatter has name+description. Spot-checked 3 referenced paths via raw fetch — references/security-checks.md, implementation-approach/SKILL.md, typescript-rules/SKILL.md all HTTP 200; no security smells (the "Knowledge Cutoff Supplement" is informational, not injection). For OUTPUT I wrote two fetchUser() implementations: baseline returned `data as User` (no validation); skill-following used `unknown` + an isUser type guard + fail-fast InvalidUserError. Ran the guard in node against `{id:42}`: baseline passes the malformed object through typed as User, skill guard returns false so it throws — a concrete observed difference matching the skill's type-safety and fail-fast rules.

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 6/10
Docs & honesty 5/5

What Coding Standards does

A universal coding-standards reference that codifies anti-pattern detection (Rule of Three, SRP, DRY, error suppression, excessive type assertions), type-safety rules (unknown + type guards over any/as), fail-fast error handling, Red-Green-Refactor testing, impact-analysis gates, and secure defaults. Triggers when implementing features, reviewing code, or refactoring. Applies as guidance in the context window rather than running any tool.

How to install Coding Standards

# Copies the coding-standards skill (SKILL.md + references/) into ~/.claude/skills
git clone --depth 1 https://github.com/shinpr/ai-coding-project-boilerplate.git /tmp/coding-standards-src
mkdir -p ~/.claude/skills
cp -R /tmp/coding-standards-src/.claude/skills-en/coding-standards ~/.claude/skills/coding-standards
# Japanese variant also exists at .claude/skills-ja/coding-standards if preferred
# No external deps, scripts, or API keys required — pure guidance document

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

Commands — how to trigger Coding Standards

/coding-standards Language-agnostic anti-pattern, type-safety, and test-first standards for reviews and refactors

It also activates on plain-language prompts like these:

Check this function for code smells
Review my pull request for anti-patterns
Refactor this module for readability

Frequently asked questions

Is the Coding Standards skill free?: Yes. The skill itself is free from shinpr/ai-coding-project-boilerplate. SkillProof publishes the install command and an independent test verdict at no cost.
Does Coding Standards work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 31, 2026. Verdict: Works with setup. Fetched SKILL.md at .claude/skills-en/coding-standards/; frontmatter has name+description. Spot-checked 3 referenced paths via raw fetch — references/security-checks.md, implementation-approach/SKILL.md, typescript-rules/SKILL.md all HTTP 200; no security smells (the "Knowledge Cutoff Supplement" is informational, not injection). For OUTPUT I wrote two fetchUser() implementations: baseline returned `data as User` (no validation); skill-following used `unknown` + an isUser type guard + fail-fast InvalidUserError. Ran the guard in node against `{id:42}`: baseline passes the malformed object through typed as User, skill guard returns false so it throws — a concrete observed difference matching the skill's type-safety and fail-fast rules.
What is the Coding Standards SkillProof Score?: 8.4/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 6/10, docs & honesty 5/5.
How do I install Coding Standards?: 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 Standards 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.