Borrowing it
Nothing to install: this file belongs to ShipWithAI/claude-code-mastery. 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/ShipWithAI/claude-code-mastery/develop/CLAUDE.mdgit clone --depth 1 https://github.com/ShipWithAI/claude-code-masteryWrote 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/shipwithai/claude-code-mastery/claude-md)<a href="https://agentmods.dev/instructions/shipwithai/claude-code-mastery/claude-md"><img src="https://agentmods.dev/badge/instructions/shipwithai/claude-code-mastery/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/shipwithai/claude-code-mastery/claude-md"><img src="https://agentmods.dev/badge/instructions/shipwithai/claude-code-mastery/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 | $0.04868 | $0.04868 |
| Opus 5.5 | $0.01947 | $0.01947 |
| Sonnet 5.5 | $0.00974 | $0.00974 |
| Haiku 4.5 | $0.00487 | $0.00487 |
Grade A, and why
claude-code-mastery 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 — 487 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md — Claude Code Mastery Course
PROJECT OVERVIEW
This is a comprehensive, professional-grade course teaching developers how to master Claude Code (Anthropic's CLI coding agent). The course targets senior developers and will be published as:
- Digital course (Markdown → Astro Starlight website)
- NotebookLM source (upload .md directly)
- Printed book (Markdown → Pandoc → DOCX → InDesign/Canva → Print)
- Workshop material (DEMO + PRACTICE sections used as live exercises)
Languages: English (src/content/docs/en/claude-code/) and Vietnamese
(src/content/docs/vi/claude-code/) — always maintain both in sync.
Author: Ethan Nguyen (Senior Android Engineer, 12+ Years, Vietnam-based, KMP/Android/Backend expert)
COURSE STRUCTURE
- 16 Phases → 64 Modules → ~200+ Topics
- Each phase is a directory:
phase-XX-name/ - Each module is a file:
XX-module-name.md - Both languages follow identical structure and numbering
Directory Layout
claude-code-mastery/
├── CLAUDE.md / CLAUDE.vi.md ← project rules (EN / VI)
├── README.md, SUMMARY.md, COURSE-INDEX.md, CONTRIBUTING.md
├── astro.config.mjs ← Starlight site (sidebar autogenerated per phase dir)
├── src/content/docs/
│ ├── en/claude-code/ ← index.mdx, cheat-sheet.mdx, tips-tricks.mdx, phase-01…16/
│ └── vi/claude-code/ ← identical structure, parallel authoring
├── templates/ ← CLAUDE.md templates, checklists (linked from modules)
├── scripts/
│ ├── lint-course.mjs ← npm run lint:course (H2=7, fences, blacklist, words, pairs)
│ ├── fix-course.mjs ← mechanical fixes (fence-lang, fence-nest, replace)
│ ├── lint-course.config.json, course-replacements.json
│ └── check-design-tokens.sh, sync-design-tokens.sh
├── docs/
│ ├── audit/ ← course audits (2026-09-21-course-audit.md)
│ ├── references/ ← anthropic-sources.md (citation registry)
│ └── superpowers/{specs,plans}/ ← design specs & implementation plans
└── .github/workflows/lint-course.yml
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 · +28 lines · +872 tokens per session 79efd5391bc4
- 1mo ago First seen · 459 lines · 3,996 tokens per session scan A 742abfab3679
claude-code-mastery CLAUDE.md is an instructions file published in the GitHub repository ShipWithAI/claude-code-mastery (99 stars, last pushed 26d ago), licensed MIT. It adds 4,868 tokens to every session, about $0.0195 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 2026-08-30.
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.