Borrowing it
Nothing to install: this file belongs to secondsky/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/secondsky/claude-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/secondsky/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/secondsky/claude-skills/claude-md)<a href="https://agentmods.dev/instructions/secondsky/claude-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/secondsky/claude-skills/claude-md.svg" alt="Measured on agentmods" 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 | $0.07874 | $0.07874 |
| Opus 5 | $0.03937 | $0.03937 |
| Sonnet 5 | $0.01575 | $0.01575 |
| Haiku 4.5 | $0.00787 | $0.00787 |
Grade B, and why
claude-skills CLAUDE.md scanned grade B with 1 finding 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 7d 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.
Enumerates other installed skillsmediumAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
ls -la ~/.claude/skills/ How it starts
The opening of the file, as written. The whole thing — 846 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Skills - Project Context
Repository: https://github.com/secondsky/claude-skills Purpose: Production-ready skills for Claude Code CLI Owner: Claude Skills Maintainers Status: Active Development | 139 Plugins | 136 Skills Complete Last Updated: 2026-06-21 Last Audit: 2026-06-21 (31 deprecated plugins removed)
⚠️ CRITICAL: Communication Rule — THE MOST IMPORTANT RULE
🚨 ABSOLUTE RULE: Always talk to the user in clear, easy, short, plain language. NEVER use jargon. This rule is more important than any other rule in this file. 🚨
When communicating with the user:
- Use plain, simple words that a non-expert understands right away
- Keep answers short and to the point
- Never use jargon or technical buzzwords — if a technical term is truly needed, explain it in one simple phrase
- Lead with the outcome: say what happened, then give detail only if it helps
⚠️ CRITICAL: Repository Policy - NEVER TOUCH JEZWEB REPO
🚨 ABSOLUTE RULE: The jezweb/claude-skills repository must NEVER be modified under ANY circumstances! 🚨
ONLY work in the official repository: https://github.com/secondsky/claude-skills
❌ FORBIDDEN ACTIONS (jezweb repo):
- ❌ NEVER push commits to
jezwebremote - ❌ NEVER create PRs to
jezweb/claude-skills - ❌ NEVER create branches targeting
jezweb - ❌ NEVER make ANY changes to
jezwebrepository - ❌ NEVER use
git push jezweborgit push upstream(both point to jezweb) - ❌ NEVER use
gh pr createwithout explicitly specifying--repo secondsky/claude-skills
✅ REQUIRED ACTIONS (secondsky repo):
- ✅ ALWAYS use
originremote pointing tosecondsky/claude-skills - ✅ ALWAYS push to:
git push origin <branch> - ✅ ALWAYS create PRs to:
secondsky/claude-skillsviagh pr create --repo secondsky/claude-skills - ✅ ALWAYS verify remote before pushing:
git remote -v(check origin = secondsky)
Why This Matters:
The jezweb/claude-skills is a PERSONAL FORK that must remain untouched. All development happens in secondsky/claude-skills. Pushing to jezweb would corrupt the fork and cause serious issues.
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.
- 7d ago First seen · 846 lines · 7,874 tokens per session scan B 3580e5e3760a
claude-skills CLAUDE.md is an instructions file published in the GitHub repository secondsky/claude-skills (214 stars, last pushed 3d ago), licensed MIT. It adds 7,874 tokens to every session, about $0.0394 per session on Opus 5. A static security scan graded it B with 1 finding (enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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