Borrowing it
Nothing to install: this file belongs to matteocervelli/llms. 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/matteocervelli/llms/main/CLAUDE.mdgit clone --depth 1 https://github.com/matteocervelli/llmsWrote 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/matteocervelli/llms/claude-md)<a href="https://agentmods.dev/instructions/matteocervelli/llms/claude-md"><img src="https://agentmods.dev/badge/instructions/matteocervelli/llms/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/matteocervelli/llms/claude-md"><img src="https://agentmods.dev/badge/instructions/matteocervelli/llms/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 | $0.00347 | $0.00347 |
| Opus 5.5 | $0.00139 | $0.00139 |
| Sonnet 5.5 | $0.00069 | $0.00069 |
| Haiku 4.5 | $0.00035 | $0.00035 |
Grade A, and why
llms 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 1mo 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.
What it actually says
llms
Reference configuration for Claude Code and Codex — production skills, hooks, rules, and agents.
Structure
.claude/ # Claude Code config
skills/ # 39 skills (invoke with /skill-name)
hooks/ # unified dispatcher + 4 handlers + YAML rules
rules/ # 21 behavioral rules
agents/ # browser-tester subagent
settings.json # hook wiring + permissions
.codex/ # Codex mirror
skills/ # same 39 skills
hooks/ # same hooks
rules/ # same rules
config.toml # Codex hook wiring + approval mode
AGENTS.md # Codex equivalent of CLAUDE.md
docs/anthropic/ # Anthropic reference docs (API, Claude Code, MCP)
.archive/ # v0.1 content — not maintained
Working on this repo
When adding or modifying a skill:
- Edit in
.claude/skills/<name>/SKILL.md - Mirror the change to
.codex/skills/<name>/SKILL.md - Run
/skillifyto validate structure - Update
docs/skill-catalog.md
When modifying hooks:
- Edit
.claude/hooks/— then sync to.codex/hooks/ - Test before committing
Sanitization policy
No personal infrastructure references. Before committing:
grep -rn "your-internal-host|your-service|your-org" .claude/ .codex/
Version
Current: v0.2.0
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.
- 1mo ago First seen · 51 lines · 347 tokens per session scan A fd1751f4d689
llms CLAUDE.md is an instructions file published in the GitHub repository matteocervelli/llms (25 stars, last pushed 5mo ago), licensed MIT. It adds 347 tokens to every session, about $0.0014 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 2026-09-03.
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).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.