Borrowing it
Nothing to install: this file belongs to adewale/guardrails-skill. 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/adewale/guardrails-skill/main/CLAUDE.mdgit clone --depth 1 https://github.com/adewale/guardrails-skillWrote 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/adewale/guardrails-skill/claude-md)<a href="https://agentmods.dev/instructions/adewale/guardrails-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/adewale/guardrails-skill/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/adewale/guardrails-skill/claude-md"><img src="https://agentmods.dev/badge/instructions/adewale/guardrails-skill/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 | $0.00996 | $0.00996 |
| Opus 5.5 | $0.00398 | $0.00398 |
| Sonnet 5.5 | $0.00199 | $0.00199 |
| Haiku 4.5 | $0.00100 | $0.00100 |
Grade A, and why
guardrails-skill 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 18d 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.
How it starts
The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
What This Is
A Claude Code skill and plugin, not an application. There is no build step and no runtime dependencies. The shipped content is markdown plus one bash template that together define quality gates for coding agents.
The skill lives in skills/guardrails/. SKILL.md is the core artifact (line budget below). Everything else supports it:
skills/guardrails/references/tool-building.md— diagnostic tool/notation catalog with worked examples (loaded on demand by the circuit breaker)skills/guardrails/references/language-defaults.md— tool selection lookup table by ecosystem (JS/TS, Python, Rust, Go, Java)skills/guardrails/assets/notation-templates/reproduction-script.sh— bash scaffold for repro scripts
The repo is also a Claude Code plugin: .claude-plugin/plugin.json (its hooks field points at .claude-plugin/hooks/hooks.json) and .claude-plugin/marketplace.json.
Repo-only files (never installed):
package.json— install metadata for skill installers (skill entry, supported harnesses). No dependencies or scripts.evals/— shared Skill Eval Harness manifest (shared-benchmark.json), fixtures, ablation patches and oracles. Seeevals/shared-harness.md.scripts/— the CI checks below.
Checks (run these before committing; CI runs the same commands)
| Check | Command | Workflow |
|---|---|---|
Install boundary (no repo-only files in skills/guardrails/) |
python3 scripts/check_install_boundary.py |
install-boundary.yml |
| SKILL.md line budget | python3 scripts/check_skill_budget.py |
install-boundary.yml |
| Plugin + hooks schema (Claude Code's own validator) and hook registration | python3 scripts/check_plugin.py (needs the claude CLI; no model or credentials) |
plugin.yml |
| Eval manifest, model-free | uvx --from skill-eval-harness==0.6.0 skill-benchmark validate --strict-leakage --check-ablations evals/shared-benchmark.json and ... audit-manifest evals/shared-benchmark.json --fail-on-blockers |
install-boundary.yml |
| Lint | uvx [email protected] check . |
ruff.yml |
| Unit tests (eval oracle, install boundary, plugin.json hooks pointer) | python3 -m unittest discover -s tests |
install-boundary.yml |
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.
- 18d ago Changed · +18 lines · +416 tokens per session 5edb8bd46c41
- 2mo ago First seen · 37 lines · 580 tokens per session scan A 3e2fc72ad92a
guardrails-skill CLAUDE.md is an instructions file published in the GitHub repository adewale/guardrails-skill (2 stars, last pushed 19d ago), licensed MIT. It adds 996 tokens to every session, about $0.0040 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.
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
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.