claude-code-mastery SKILL.md skillA
claude-code-mastery from borghei/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add borghei/claude-skills/claude-code-mastery@v1.1.0Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- borghei/claude-skills
- Path
engineering/claude-code-mastery/SKILL.md- Versions recorded
- 6
- Latest version
- v1.1.0, committed Sep 27, 2026
- First version recorded
- Mar 21, 2026
- Size
- 7,772 bytes
- Repository stars
- 1,075
- License
- a license file GitHub does not identify
Use when the user asks to "optimize CLAUDE.md", "create a new skill", "write a custom agent", "configure hooks", "manage context window", "set up MCP servers", "scaffold a skill package", "analyze token budget", "create subagents", "configure permissions", "set up worktrees", or "integrate Claude Code with editors". Covers Claude Code CLI mastery, skill authoring, context engineering, hooks automation, subagent creation, and development workflow optimization.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Claude Code Mastery Expert skill for Claude Code CLI -- CLAUDE.md optimization, skill authoring, subagent creation, hooks automation, and context engineering. **Keywords:** claude-code, claude-cli, CLAUDE.md, skill-authoring, subagents, hooks, context-window, token-budget, MCP-servers, worktrees, permission-modes, prompt-engineering, context-engineering, slash-commands ## Core Capabilities - **CLAUDE.md optimization** — audit, restructure, compress, and hierarchize config files for token efficiency. - **Skill authoring** — scaffold and write discoverable skill packages with correct layout and frontmatter. - **Subagent creation** — write `.claude/agents/<name>.md` files with a `tools` allowlist and a Markdown-body system prompt. - **Hooks automation** — wire `PreToolUse`/`PostToolUse`/`Stop` lifecycle scripts via `.claude/settings.json`. - **Context engineering** — measure and manage the context-window token budget across a codebase. ## When to Use - Authoring, structuring, or optimizing a CLAUDE.md file for any project. - Scaffolding a new skill package or creating a Claude Code subagent. - Configuring hooks for automated quality, security, or workflow steps. …
Read the whole file at its exact version.
How to install
mdr add borghei/claude-skills/claude-code-mastery@sha256:ced3eb15bd68d9b0The line at the top of this page pins the label v1.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_372322nt5crsas5m)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Mar 21, 2026 and Sep 27, 2026, about one every 38 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-09-27 | b415b77 | 7,772 B | A | view · diff |
| v1.1.0 | 2026-09-27 | ddfd911 | 7,773 B | A | view · diff |
| v1.1.0 | 2026-06-22 | 65b93aa | 7,251 B | B | view · diff |
| v1.1.0 | 2026-06-17 | 8980a67 | 6,505 B | B | view · diff |
| v1.0.0 | 2026-03-30 | 6b5a5d8 | 17,889 B | B | view · diff |
| v1.0.0 | 2026-03-21 | deb73d4 | 18,273 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7772 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
borghei/claude-skills · 1,075 stars · license a license file GitHub does not identify · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_372322nt5crsas5m GET https://markdownregistry.com/api/v1/resolve?ref=borghei/claude-skills/claude-code-mastery GET https://markdownregistry.com/api/v1/blob/ced3eb15bd68d9b036a3a0694aae459fcc0f15f1056c55c6dc6db60bd9a0ec60
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.