Borrowing it
Nothing to install: this file belongs to mthines/agent-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/mthines/agent-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/mthines/agent-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/mthines/agent-skills/claude-md)<a href="https://agentmods.dev/instructions/mthines/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/mthines/agent-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/mthines/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/mthines/agent-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 | $0.04461 | $0.04461 |
| Opus 5.5 | $0.01784 | $0.01784 |
| Sonnet 5.5 | $0.00892 | $0.00892 |
| Haiku 4.5 | $0.00446 | $0.00446 |
Grade A, and why
agent-skills CLAUDE.md scanned grade A 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 today.
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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- `attach-media` (`Skill()` + `/`) — uploads screenshots and recordings to a PR or issue via `gh --attach`, with a curl fallback; owns the `<!-- attach-media:v1 -->` body region. Never writes placeholders How it starts
The opening of the file, as written. The whole thing — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Skills
Audience
Agentic frameworks (AI coding agents, copilots, autonomous developer tools) consume these skills and agents operationally, so every line must be actionable without human interpretation:
- Be prescriptive: tell the agent what to do, not what a concept means.
- Make decisions enumerable: numbered steps, lookup tables, or explicit criteria.
- Give every actionable rule a code example showing the correct and the incorrect pattern.
- State concrete, testable criteria, never subjective ones.
- Keep each file self-contained.
Where knowledge goes (mandatory on every change)
This file loads into every session, so it holds only what an agent needs on every task. Classify what you learned and write it only where the table says:
| What you learned | Write it to | Never write it to |
|---|---|---|
| A new or changed skill / agent | a one-line hook (≤ 300 chars) in the inventory below, plus the skill's own SKILL.md |
a paragraph here |
| A rule the agent must follow | the owning skill's rules/<topic>.md (cross-cutting: agents/shared/rules/<topic>.md) — the rule only, plus at most a one-line **Why:** |
this file, docs/inventory.md |
| Why the rule or design exists, the alternative it beat, the failure it prevents | the owning skill's references/<topic>.md (cross-cutting: agents/shared/references/<topic>.md), stated as current fact, linked from the rule |
rules/, this file |
| What changed, in which version or PR, measured run numbers | the commit message and PR description only | any file in the repo |
| A headline result worth showing users | README.md ## Measured, not assumed only — at most four bullets, each backed by a PR that holds the method and the runs |
any other file |
| An eval result | the PR description; scripts/eval/README.md only when it changes a standing decision, recorded as the decision, not the run log |
this file, docs/evals.md |
| Narrative about how the repo is wired (symlinks, plugins, packages) | docs/development.md or the package's own CLAUDE.md |
this file |
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.
- today Changed · +18 tokens per session 6832d226504a
- yesterday Changed · +40 tokens per session d3d21929b71b
- 2d ago Changed · +12 tokens per session 9f7b7a37a8a0
- 5d ago Changed · +16 tokens per session 8810843b652c
- 6d ago Changed · +64 tokens per session ec06072b3dfe
- 8d ago Changed · -134 lines · -1,888 tokens per session 0663e88fe90a
- 10d ago Changed · +1 lines · +41 tokens per session 9732da2236a1
- 11d ago Changed · +1 lines · +77 tokens per session 6043ea564c4c
- 25d ago Changed · +32 tokens per session f0924b0d7317
- 26d ago First seen · 312 lines · 6,049 tokens per session scan A 6c46fc546e45
agent-skills CLAUDE.md is an instructions file published in the GitHub repository mthines/agent-skills (20 stars, last pushed yesterday), licensed MIT. It adds 4,461 tokens to every session, about $0.0178 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). 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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.