Borrowing it
Nothing to install: this file belongs to Contentrain/ai. 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/Contentrain/ai/main/CLAUDE.mdgit clone --depth 1 https://github.com/Contentrain/aiWrote 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/contentrain/ai/claude-md)<a href="https://agentmods.dev/instructions/contentrain/ai/claude-md"><img src="https://agentmods.dev/badge/instructions/contentrain/ai/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/contentrain/ai/claude-md"><img src="https://agentmods.dev/badge/instructions/contentrain/ai/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 | $0.03298 | $0.03298 |
| Opus 5.5 | $0.01319 | $0.01319 |
| Sonnet 5.5 | $0.00660 | $0.00660 |
| Haiku 4.5 | $0.00330 | $0.00330 |
Grade A, and why
ai 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 13d 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 — 227 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md — contentrain-ai
Project Overview
MIT-licensed monorepo for Contentrain's open-source packages: MCP tools, CLI, TypeScript types, AI rules, and universal query SDK.
Vision: "AI-generated content governance infrastructure"
Monorepo Structure
contentrain-ai/
├── packages/
│ ├── mcp/ — 27 MCP tools (22 core + 5 media), stdio + HTTP transports, Local / GitHub / GitLab providers (simple-git + zod + MCP SDK)
│ ├── cli/ — citty + tsdown (init, status, doctor, validate, serve, generate, diff, merge, reconcile, prune, scaffold, import, studio connect, …)
│ ├── types/ — Shared TypeScript types (@contentrain/types)
│ ├── rules/ — AI agent quality rules & conventions
│ ├── skills/ — AI agent workflow procedures & framework guides
│ ├── wp-import/ — WordPress WXR/REST → RawIR → .contentrain store
│ ├── emitter-astro/— ProjectIR → a complete Astro project
│ ├── verify/ — Offline SEO/indexing/link/asset gates for a built site
│ ├── astro-kit/ — Copy-in Astro components + catalog + builder mapping tables
│ ├── decide/ — Typed decisions (rule → Jev → Claude Haiku), cached and budgeted
│ └── sdk/
│ └── js/ — Universal query SDK (@contentrain/query)
├── templates/
│ ├── astro-starter/ — Astro + Contentrain base for migrations; standalone (own lockfile), gated by scripts/starter-gates.mjs
│ └── fixtures/ — content laid over the starter in CI (wp-demo)
├── plugins/
│ └── contentrain/ — Claude Code plugin payload. GENERATED by `pnpm plugin:build`
│ from packages/skills (curated 7-skill subset + framework
│ guides). Never edit by hand; CI fails on a stale diff.
│ Versioned by changesets as the private workspace package
│ @contentrain/claude-plugin — its package.json version is
│ the single source of truth and build propagates it into
│ plugin.json and marketplace.json. See RELEASING.md
├── docs/
│ └── — Reserved for the public VitePress docs site
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.
- 13d ago Changed · +4 lines · +140 tokens per session 5e9f758ae2a5
- 27d ago Changed · +3 lines · +59 tokens per session 2a2d1a12a945
- 1mo ago Changed · +6 lines · +141 tokens per session f38e6f2e7ba1
- 1mo ago Changed · +1 lines · +24 tokens per session bc8074ce61da
- 1mo ago First seen · 213 lines · 2,934 tokens per session scan A 6e91b7b28180
ai CLAUDE.md is an instructions file published in the GitHub repository Contentrain/ai (6 stars, last pushed today), licensed MIT. It adds 3,298 tokens to every session, about $0.0132 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
data-scientist copilot-instructions.md
Repository instructions for a data-science workflow in GitHub Copilot, covering datasets, statistics, and analysis files.
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).