Borrowing it
Nothing to install: this file belongs to frankxai/claude-skills-library. 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/frankxai/claude-skills-library/main/CLAUDE.mdgit clone --depth 1 https://github.com/frankxai/claude-skills-libraryWrote 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/frankxai/claude-skills-library/claude-md)<a href="https://agentmods.dev/instructions/frankxai/claude-skills-library/claude-md"><img src="https://agentmods.dev/badge/instructions/frankxai/claude-skills-library/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/frankxai/claude-skills-library/claude-md"><img src="https://agentmods.dev/badge/instructions/frankxai/claude-skills-library/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 | $0.00539 | $0.00539 |
| Opus 5.5 | $0.00216 | $0.00216 |
| Sonnet 5.5 | $0.00108 | $0.00108 |
| Haiku 4.5 | $0.00054 | $0.00054 |
Grade A, and why
claude-skills-library 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code / Agent Harness Instructions
This repository defines skills and enforcement packs for the Anthropic Claude ecosystem. Agents must follow the instructions detailed in this file and in AGENTS.md.
Key Directories
free-skills/: Contains the public skills catalog. Each skill must have its own directory containing aSKILL.mdwith proper frontmatter.packs/: Enforcement packs that provide mechanisms for verifying skills (CI hooks, checks, templates).scripts/: Validation, generation, and other CI scripts.docs/: Generated catalog output and static HTML.runtimes/: Guides for various runtime platforms.
Validation, Build, and Lint Commands
Whenever modifying files, especially skills or packs, always run validation scripts before pushing:
- Validate skills frontmatter & structure:
python3 scripts/validate_skills.py - Run all test suites:
node --test(includes pack tests and absorption gates) - Check internal links:
python3 scripts/check_links.py - Generate and check catalog sync:
python3 scripts/generate_catalog.py --check - Generate and check catalog site sync:
python3 scripts/generate_site.py --check - Check README counts:
python3 scripts/check_counts.py - Build catalog and check JSON sync:
node scripts/build-catalog.mjs --check
Conventions and Rules
- Consult
AGENTS.md:AGENTS.mdcontains the cross-harness operating contract, inherited estate rules, guardrails, and non-waivable constraints. Always obeyAGENTS.mdrules. - Single Scope per Branch: Agents must work on a single bounded context per branch (one agent = one branch) to prevent collisions.
- No Absolute Machine Paths as Docs: Do not document internal machine-specific paths as standard URLs or global usage points.
- Do Not Touch Prohibited Areas: Avoid changes to payments/checkout/billing/webhooks, auth, secrets,
.envfiles,vercel.json,.github/workflows, brand/product copy, or income/earnings claims, unless explicitly named in the task scope.
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.
- yesterday First seen · 38 lines · 539 tokens per session scan A e2f9daefef5d
claude-skills-library CLAUDE.md is an instructions file published in the GitHub repository frankxai/claude-skills-library (47 stars, last pushed today), licensed MIT. It adds 539 tokens to every session, about $0.0022 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 2026-10-25.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.