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Agent skill

Init

by asgeirtj in asgeirtj/system_prompts_leaks

Initialize a new CLAUDE.md file with codebase documentation. An agent skill from asgeirtj/system_prompts_leaks.

CC0-1.0Auto-check passedAgent Workflows

Install Init

skills CLI
$ npx skills add asgeirtj/system_prompts_leaks --skill init -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install asgeirtj/system_prompts_leaks init --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Anthropic/claude-code/skills/init .claude/skills/init && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
init
GitHub stars
69k
Token cost
~602 tokens
SKILL.md length
334 words
Files
1
Skills in repo
121
Repo updated
First seen
Licence
CC0-1.0

At a glance

Initialize a new CLAUDE.md file with codebase documentation. An agent skill from asgeirtj/system_prompts_leaks.

  • Works in 2 steps: Commands that will be commonly used,… → High-level code architecture and…
  • Tasks that involve Agent instruction files
  • Calls claude

What it does

Init is an agent skill from asgeirtj/system_prompts_leaks. Initialize a new CLAUDE.md file with codebase documentation

Its SKILL.md is about 600 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering Agent instruction files. The repository describes itself as: Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro… The licence is CC0-1.0.

When your agent uses it

  • Tasks that involve Agent instruction files

Example prompts

  • “/init”

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

  1. Commands that will be commonly used, such as how to build, lint, and run tests. Include the necessary commands to develop in this…
  2. High-level code architecture and structure so that future instances can be productive more quickly. Focus on the "big picture"…

What it can do on your machine

Read from SKILL.md and the folder at commit dd45aa5. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • claude

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Init loads about 602 tokens when it runs. Until then it costs about 16 tokens; SKILL.md has 334 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~16
When it runs · the whole SKILL.md, loaded when a task matches
~602

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from asgeirtj/system_prompts_leaks at commit dd45aa5, republished under its CC0-1.0 licence (© asgeirtj). 334 words, ~602 tokens.

Download SKILL.mdSave it as .claude/skills/init/SKILL.md (or your agent's skills folder).
name
init
description
Initialize a new CLAUDE.md file with codebase documentation

Please analyze this codebase and create a CLAUDE.md file, which will be given to future instances of Claude Code to operate in this repository.

What to add:

  1. Commands that will be commonly used, such as how to build, lint, and run tests. Include the necessary commands to develop in this codebase, such as how to run a single test.
  2. High-level code architecture and structure so that future instances can be productive more quickly. Focus on the "big picture" architecture that requires reading multiple files to understand.

Usage notes:

  • If there's already a CLAUDE.md, suggest improvements to it.
  • When you make the initial CLAUDE.md, do not repeat yourself and do not include obvious instructions like "Provide helpful error messages to users", "Write unit tests for all new utilities", "Never include sensitive information (API keys, tokens) in code or commits".
  • Avoid listing every component or file structure that can be easily discovered.
  • Don't include generic development practices.
  • If there are Cursor rules (in .cursor/rules/ or .cursorrules) or Copilot rules (in .github/copilot-instructions.md), make sure to include the important parts.
  • If there is a README.md, make sure to include the important parts.
  • If you find an OpenAI Codex config (/.codex/config.toml or ./.codex/) or a Gemini CLI config (/.gemini/settings.json or ./.gemini/ or a GEMINI.md), offer to import it now — tell the user to reply /import to scan and list what's importable (MCP servers, slash commands, subagents, skills, instructions), then /import --yes=<digest> (the scan output names the digest) to apply the user-level items. Do NOT read the foreign-agent config files or write Claude Code config yourself — the deterministic import (triggered by --yes) applies the same safe-name and path-traversal guards as the terminal picker. If /import isn't available on this surface, tell the user to run claude import from a terminal instead.
  • Do not make up information such as "Common Development Tasks", "Tips for Development", "Support and Documentation" unless this is expressly included in other files that you read.
  • Be sure to prefix the file with the following text:
# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

© asgeirtj, CC0-1.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in Anthropic/claude-code/skills/init of asgeirtj/system_prompts_leaks.

Open the folder on GitHubat commit dd45aa5

Compare with similar skills

Init next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Init compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Init this skillasgeirtj/system_prompts_leaks69k—~602Automated safety check: PassCC0-1.0
Using Agent Skillsaddyosmani/agent-skills103k4 repos~2.4kAutomated safety check: PassMIT
Claude ReflectBayramAnnakov/claude-reflect1.7k2 repos~627Automated safety check: PassMIT
Writing For Agentsbestofjs/bestofjs3.1k19 repos~2.7kAutomated safety check: PassMIT
Neat-Freak Knowledge CloseoutKKKKhazix/khazix-skills21k—~1.9kAutomated safety check: PassMIT
Task Observerrebelytics/one-skill-to-rule-them-all3.2k1 repos~12kAutomated safety check: PassCC-BY-4.0

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Categories

Questions about Init

What does Init do?

Initialize a new CLAUDE.md file with codebase documentation. An agent skill from asgeirtj/system_prompts_leaks. Init is an agent skill from asgeirtj/system_prompts_leaks.

When should I use Init?

Init fits situations like: tasks that involve Agent instruction files.

How do I install Init in Claude Code?

Run `npx skills add asgeirtj/system_prompts_leaks --skill init -a claude-code`. Or copy the skill folder (Anthropic/claude-code/skills/init in asgeirtj/system_prompts_leaks) into .claude/skills/init in your project. Claude Code loads it when a task matches its description.

How do I install Init in Codex?

Run `npx skills add asgeirtj/system_prompts_leaks --skill init -a codex`. Or copy the skill folder (Anthropic/claude-code/skills/init in asgeirtj/system_prompts_leaks) into .agents/skills/init in your project. Codex loads it when a task matches its description.

Can I use Init in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add asgeirtj/system_prompts_leaks --skill init -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/init, .gemini/skills/init, .github/skills/init and .opencode/skills/init in your project.

What does Init need to run?

Going by SKILL.md and its folder, Init needs the command-line tools its instructions call (claude).

Does Init access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Init safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Init use?

Init is published under the CC0-1.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Init use?

About 602 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Init?

Skills that share tags, products or a category with Init: Using Agent Skills (addyosmani/agent-skills, 103k stars), Claude Reflect (BayramAnnakov/claude-reflect, 1.7k stars), Writing For Agents (bestofjs/bestofjs, 3.1k stars) and Neat-Freak Knowledge Closeout (KKKKhazix/khazix-skills, 21k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Init?

asgeirtj (a GitHub user) maintains it in asgeirtj/system_prompts_leaks, which has 69,095 GitHub stars. The repository holds 121 skills in this directory. The repository was last updated on October 7, 2026.

Source: asgeirtj/system_prompts_leaks on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.