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skill-validator: Instructions file for Claude Code

CLAUDE.md

skill-validator CLAUDE.md is an instructions file for Claude Code from raphaelstolt/skill-validator. It costs 441 tokens per session, scanned A, original, MIT.

A repository guide for a PHP library that parses and validates SKILL.md files against their format specification. It documents the project structure, commands, coding rules, and architecture.

In plain words
What is it for?
Use it when developing, testing, formatting, analysing, or preparing commits for the skill-validator package.
Why use it?
It gives the coding agent the local conventions and checks needed to change the library consistently.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is raphaelstolt/skill-validator's own configuration. It tells Claude Code how to work on skill-validator itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything skill-validator configures →

not rated 2repo 1mo ago A scan 441 tokens original MIT
View source ↗ raphaelstolt/skill-validator
Reuse

Borrowing it

Nothing to install: this file belongs to raphaelstolt/skill-validator. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/raphaelstolt/skill-validator/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/raphaelstolt/skill-validator

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for skill-validator CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/raphaelstolt/skill-validator/claude-md/github.svg)](https://agentmods.dev/instructions/raphaelstolt/skill-validator/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/raphaelstolt/skill-validator/claude-md"><img src="https://agentmods.dev/badge/instructions/raphaelstolt/skill-validator/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for skill-validator CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/raphaelstolt/skill-validator/claude-md"><img src="https://agentmods.dev/badge/instructions/raphaelstolt/skill-validator/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 441 This file is loaded in full into every session.
When invoked 441 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00441 $0.00441
Opus 5.5 $0.00176 $0.00176
Sonnet 5.5 $0.00088 $0.00088
Haiku 4.5 $0.00044 $0.00044

Measured 2mo ago against content hash 3340da86f5c5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skill-validator CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 47 lines

What it actually says

skill-validator

PHP library for parsing and validating SKILL.md files against the SKILL.md format specification.

Project Info

  • Language: PHP >= 8.2
  • Namespace: Stolt\Ai\Skill\
  • Package: stolt/skill-validator

Common Commands

composer test                   # Run PHPUnit tests
composer test-agentic           # Run PHPUnit tests with agentic output
composer test-with-coverage     # Run tests with coverage report
composer cs-fix                 # Auto-fix coding style (PSR-2)
composer cs-lint                # Check coding style compliance
composer static-analyse         # Run PHPStan (level 5)
composer spell-check            # Check for spelling errors
composer validate-gitattributes # Validate .gitattributes
composer pre-commit-check       # Run all checks before committing

Code Conventions

  • PSR-2 coding standard enforced via php-cs-fixer
  • Strict types required: declare(strict_types=1); in every file
  • Final classes by default
  • Readonly properties and constructor property promotion preferred
  • Static factory methods with private constructors for immutable objects
  • PHPStan level 5 — all types must be explicit
  • Follow Conventional Commits for commit messages

Architecture

  • src/Validator.php — main validator; validate(), validateFile(), validateContent()
  • src/ValidationResult.php — immutable result with isValid(), errors(), metadata(), body()
  • src/Metadata.php — immutable metadata container

Testing

  • Framework: PHPUnit 11 with #[Test] attributes
  • DG\BypassFinals is enabled in bootstrap to allow mocking final classes
  • Base TestCase provides setUpTemporaryDirectory() and removeDirectory() helpers
  • Tests live in tests/ under namespace Stolt\Ai\Skill\Tests
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 47 lines · 441 tokens per session scan A 3340da86f5c5

Subscribe to this mod's changes

skill-validator CLAUDE.md is an instructions file published in the GitHub repository raphaelstolt/skill-validator (2 stars, last pushed 1mo ago), licensed MIT. It adds 441 tokens to every session, about $0.0018 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

PHPparsing-libraryskill-developmentskill-mdskill-md-validationvalidation-library
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