Borrowing it
Nothing to install: this file belongs to zacklecon/claude-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/zacklecon/claude-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/zacklecon/claude-skillsWrote 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.
[](https://agentmods.dev/instructions/zacklecon/claude-skills/claude-md)<a href="https://agentmods.dev/instructions/zacklecon/claude-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/zacklecon/claude-skills/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.
<a href="https://agentmods.dev/instructions/zacklecon/claude-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/zacklecon/claude-skills/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.02115 | $0.02115 |
| Opus 5 | $0.01058 | $0.01058 |
| Sonnet 5 | $0.00423 | $0.00423 |
| Haiku 4.5 | $0.00212 | $0.00212 |
Grade A, and why
claude-skills 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 9d 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.
This is a copy
86% identical to claude-skills CLAUDE.md — 61 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 287 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Skills Project Configuration
This file governs Claude's behavior when working on the claude-skills repository.
Skill Authorship Standards
Skills follow the Agent Skills specification. This section covers project-specific conventions that go beyond the base spec.
The Description Trap
Critical: Skill descriptions must be TRIGGER-ONLY. Never summarize the workflow or process.
When descriptions contain process steps, agents follow the brief description instead of reading the full skill content. This defeats the purpose of detailed skills.
BAD - Process in description:
description: Use for debugging. First investigate root cause, then analyze
patterns, test hypotheses, and implement fixes with tests.
GOOD - Trigger-only:
description: Use when encountering bugs, errors, or unexpected behavior
requiring investigation.
Format: Use when [specific triggering conditions]
Descriptions tell WHEN to use the skill. The SKILL.md body tells HOW.
Frontmatter Requirements
Per the Agent Skills specification, only name and description are top-level required fields. Custom fields go under metadata.
---
name: skill-name-with-hyphens
description: Use when [triggering conditions] - max 1024 chars
license: MIT
metadata:
author: https://github.com/Jeffallan
version: "1.0.0"
domain: frontend
triggers: keyword1, keyword2, keyword3
role: specialist
scope: implementation
output-format: code
related-skills: fullstack-guardian, test-master, devops-engineer
---
Top-level fields (spec-defined):
name: Letters, numbers, and hyphens only (no parentheses or special characters)description: Maximum 1024 characters, trigger-only formatlicense: AlwaysMITfor this projectallowed-tools: Space-delimited tool list (only on skills that restrict tools)
Metadata fields (project-specific):
author: GitHub profile URL of the skill authorversion: Semantic version string (quoted, e.g.,"1.0.0")domain: Category from the domain list belowtriggers: Comma-separated searchable keywordsrole:specialist|expert|architect|engineerscope:implementation|review|design|system-design|testing|analysis|infrastructure|optimization|architectureoutput-format:code|document|report|architecture|specification|schema|manifests|analysis|analysis-and-code|code+analysisrelated-skills: Comma-separated skill directory names (e.g.,fullstack-guardian, test-master). Must resolve to existing skill directories.
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.
- 9d ago First seen · 287 lines · 2,115 tokens per session scan A bb6f7bf4420f
claude-skills CLAUDE.md is an instructions file published in the GitHub repository zacklecon/claude-skills (3 stars, last pushed 2d ago), licensed MIT. It adds 2,115 tokens to every session, about $0.0106 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to claude-skills CLAUDE.md, differing in 61 lines, and is treated as a copy.
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