Borrowing it
Nothing to install: this file belongs to zzusp/doc-first-dev. 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/zzusp/doc-first-dev/main/CLAUDE.mdgit clone --depth 1 https://github.com/zzusp/doc-first-devWrote 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/zzusp/doc-first-dev/claude-md)<a href="https://agentmods.dev/instructions/zzusp/doc-first-dev/claude-md"><img src="https://agentmods.dev/badge/instructions/zzusp/doc-first-dev/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/zzusp/doc-first-dev/claude-md"><img src="https://agentmods.dev/badge/instructions/zzusp/doc-first-dev/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 | $0.00316 | $0.00316 |
| Opus 5.5 | $0.00126 | $0.00126 |
| Sonnet 5.5 | $0.00063 | $0.00063 |
| Haiku 4.5 | $0.00032 | $0.00032 |
Grade A, and why
doc-first-dev 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 2mo 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
CLAUDE.md — doc-first-dev
本仓库是一套可安装的 Agent Skills，不是业务项目。在此仓库中工作时请遵守以下规则。
仓库结构
skills/
spec-first/ # 文档驱动全周期 skill
SKILL.md # 入口
*.md # 各阶段文件（init, step0, phase-a/b/c/d, error-handling）
assets/ # 供目标项目使用的模板文件
evals/ # 评测场景
whylog-record/ # 决策日志 skill
SKILL.md
evals/
reference/
best-practices.md # Skill 编写参考指南，修改 skill 前必读
编写规则
- 修改任何 skill 文件前，先阅读
reference/best-practices.md - skill 文件保持精简：不解释 Claude 已知的常识，只写 Claude 没有的上下文
- 文件命名：全小写 + 连字符（如
phase-a.md、claude-md-snippet.md） - 模板文件（
assets/）中的占位符统一用<尖括号>格式 - 不在 skill 文件里硬编码用户项目的具体路径
评测
修改 skill 逻辑后，对照 evals/ 中的场景手动验证主要路径是否仍符合预期。
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.
- 2mo ago First seen · 32 lines · 316 tokens per session scan A 50a7d4b8bd6b
doc-first-dev CLAUDE.md is an instructions file published in the GitHub repository zzusp/doc-first-dev (6 stars, last pushed 6mo ago), licensed MIT. It adds 316 tokens to every session, about $0.0013 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.