ai-dev-os-init

ai-dev-os-init is a skill for Claude Code, Codex from yunbow/ai-dev-os-plugin-claude-code. It costs 45 tokens per session (652 once invoked), scanned A, original, MIT.

A setup guide for an AI-assisted coding project. It asks about the project's technology, size, and existing rule files, then creates a four-level project guidance structure.

In plain words
What is it for?
Use it when creating a project or adding AI Dev OS to an existing one. It helps organize coding, formatting, linting, and delivery rules for the project.
Why use it?
It avoids starting with empty or conflicting instructions for coding agents. It also helps preserve useful settings from files such as .editorconfig, ESLint, Prettier, and CI configuration.

Skill for Claude CodeCodex

Part of the ai-dev-os plugin — 11 skills, 3 agents, 3 hooks shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/yunbow/ai-dev-os-plugin-claude-code/ai-dev-os-init
Any agent
npx skills add yunbow/ai-dev-os-plugin-claude-code --skill ai-dev-os-init
Clone the repo
git clone --depth 1 https://github.com/yunbow/ai-dev-os-plugin-claude-code

Made for: Claude Code, Codex.

Or install ai-dev-os, the plugin that ships this one along with the rest of its 11 skills, 3 agents, 3 hooks.

Wrote 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.

agentmods badge for ai-dev-os-init

README.md
[![agentmods](https://agentmods.dev/badge/skills/yunbow/ai-dev-os-plugin-claude-code/ai-dev-os-init.svg)](https://agentmods.dev/skills/yunbow/ai-dev-os-plugin-claude-code/ai-dev-os-init)
Your own site
<a href="https://agentmods.dev/skills/yunbow/ai-dev-os-plugin-claude-code/ai-dev-os-init"><img src="https://agentmods.dev/badge/skills/yunbow/ai-dev-os-plugin-claude-code/ai-dev-os-init.svg" alt="Measured on agentmods" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 652 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00045 $0.00652
Opus 5 $0.00023 $0.00326
Sonnet 5 $0.00009 $0.00130
Haiku 4.5 $0.00005 $0.00065

Measured 4d ago against content hash da7840f0776f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ai-dev-os-init 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 4d 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.

skills/ai-dev-os-init/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AI Dev OS Setup Wizard

Execution Flow

1. Interview the User

  • Tech stack (Next.js / Python / Go / etc.)
  • Project scale (personal / team / enterprise)
  • Existing rule files (.cursorrules, CLAUDE.md, .kiro/steering/, etc.)

2. Detect and Import Existing Rules

Scan the project for existing configuration and rule files:

Source Action
.cursorrules Convert to L3 guidelines
Existing CLAUDE.md Classify into L3-L4
.editorconfig Import formatting rules into L3 common/code.md
.eslintrc / eslint.config.* Extract coding rules into L3 guidelines
biome.json / biome.jsonc Extract lint/format rules into L3 guidelines
ruff.toml / pyproject.toml [tool.ruff] Extract Python lint rules into L3 guidelines
.prettierrc / prettier.config.* Import formatting config into L3 common/code.md
tsconfig.json (strict settings) Reference in L3 common/code.md
.github/workflows/*.yml Reference CI/CD patterns in L3 common/cicd.md

For each detected file:

  1. Read its content
  2. Extract rules that map to AI Dev OS guideline categories
  3. Present the extracted rules to the user for confirmation
  4. Write confirmed rules into the appropriate L3 guideline files

3. Generate Templates

Generate the following structure:

ai-dev-os/
├── 01_philosophy/
│   └── core-values.md          # Minimal placeholder
├── 02_decision-criteria/
│   └── coding.md               # 5-10 basic principles
├── 03_guidelines/
│   ├── common/
│   │   ├── code.md             # Basic rules based on tech stack
│   │   ├── naming.md
│   │   └── security.md
│   └── frameworks/
│       └── [selected-stack]/
│           └── overview.md
└── 04_ai-frames/
    └── claude-code.md          # CLAUDE.md reference pattern

4. Generate CLAUDE.md

  • Auto-insert references to the ai-dev-os directory
  • Set up Specificity Cascade

5. Git Submodule Setup (Optional)

  • For managing ai-dev-os as a separate repository

Read the full file on GitHub · 79 lines

Changes

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.

  1. 4d ago First seen · 79 lines · 45 tokens per session scan A da7840f0776f

Subscribe to this mod's changes

ai-dev-os-init is a skill published in the GitHub repository yunbow/ai-dev-os-plugin-claude-code (2 stars, last pushed 5mo ago), licensed MIT. It adds 45 tokens to every session and 652 once invoked, about $0.0002 per session on Opus 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.

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