Borrowing it
Nothing to install: this file belongs to smicolon/ai-kit. 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/smicolon/ai-kit/main/CLAUDE.mdgit clone --depth 1 https://github.com/smicolon/ai-kitWrote 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/smicolon/ai-kit/claude-md)<a href="https://agentmods.dev/instructions/smicolon/ai-kit/claude-md"><img src="https://agentmods.dev/badge/instructions/smicolon/ai-kit/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/smicolon/ai-kit/claude-md"><img src="https://agentmods.dev/badge/instructions/smicolon/ai-kit/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 | $0.06131 | $0.06131 |
| Opus 5.5 | $0.02452 | $0.02452 |
| Sonnet 5.5 | $0.01226 | $0.01226 |
| Haiku 4.5 | $0.00613 | $0.00613 |
Grade A, and why
ai-kit 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.
How it starts
The opening of the file, as written. The whole thing — 628 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.
Repository Purpose
This repository is an open-source toolkit maintained by Smicolon that ships convention packs (agents, skills, commands, hooks, rules) for popular stacks (Django, NestJS, Next.js, Nuxt.js, Hono, TanStack Router, Better Auth, Flutter, system architecture, dev loops, and more). Each pack bundles best-practice defaults teams can adopt or override.
It can be consumed in two ways:
- As a Claude Code marketplace —
/plugin marketplace add github.com/smicolon/ai-kitthen/plugin install <pack>. Picks up updates through Claude Code's plugin system. - As a standalone CLI (
@smicolon/ai-kit) —bunx @smicolon/ai-kit add <pack>(or via npm/Homebrew binary) installs packs per-project into.claude/,.cursor/,.windsurf/,.codex/, etc. Works with any AI coding tool listed inpackages/cli/src/tools.ts, not just Claude Code. Per-project state lives in.ai-kit.json.
Both consumption paths read the same source of truth: .claude-plugin/marketplace.json and the pack contents in packs/.
Development Environment
Notes for any AI agent (Claude Code, Cursor Cloud, Codex, etc.) working in this repo. The same content is exposed as AGENTS.md (symlink to this file) so tools that look for AGENTS.md see it too.
Repo shape
- Bun workspaces + Turborepo monorepo. Bun is the only supported package manager — do not use npm, yarn, or pnpm. The lockfile is
bun.lock. packages/cli/is the only buildable package: a TypeScript CLI (@smicolon/ai-kit) built with tsup, ESM-only ("type": "module"), targeting Node 22+. Do not introduce CommonJS patterns.packs/holds convention packs as Markdown (agents, skills, commands, rules, hooks). They are consumed by AI coding tools, not executed directly — editing them only requires Markdown.
Common scripts
| Task | Command |
|---|---|
| Install deps | bun install |
| Typecheck CLI | bun run --filter @smicolon/ai-kit typecheck |
| Build CLI | bun run --filter @smicolon/ai-kit build |
| Watch / dev mode | bun run --filter @smicolon/ai-kit dev |
| Smoke-test built CLI | node packages/cli/dist/index.js --help |
| Validate marketplace | claude plugin validate . |
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 Changed · +55 lines · +941 tokens per session 4393839d3da3
- 1mo ago First seen · 573 lines · 5,190 tokens per session scan A 06cc58070e14
ai-kit CLAUDE.md is an instructions file published in the GitHub repository smicolon/ai-kit (6 stars, last pushed 1mo ago), licensed MIT. It adds 6,131 tokens to every session, about $0.0245 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).
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.