mags-init

mags-init is a skill for Claude Code, Codex from doancan/mags. It costs 11 tokens per session (942 once invoked), scanned A, original, MIT.

A setup guide for MAGS, a project system that stores and indexes development guidance and documentation. It checks existing project documents or asks for basic project details before setting things up.

In plain words
What is it for?
Use it when starting MAGS in a project, indexing an existing docs/ folder, or collecting the project’s stack, architecture, and documentation language.
Why use it?
It removes the manual work of preparing a project for shared documentation and guidance. It also helps bring existing Markdown files into one searchable system.

Skill for Claude CodeCodex

Part of the mags plugin — 17 skills, 2 agents 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/doancan/mags/mags-init
Any agent
npx skills add doancan/mags --skill mags-init
Clone the repo
git clone --depth 1 https://github.com/doancan/mags

Made for: Claude Code, Codex.

Or install mags, the plugin that ships this one along with the rest of its 17 skills, 2 agents.

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 mags-init

README.md
[![agentmods](https://agentmods.dev/badge/skills/doancan/mags/mags-init.svg)](https://agentmods.dev/skills/doancan/mags/mags-init)
Your own site
<a href="https://agentmods.dev/skills/doancan/mags/mags-init"><img src="https://agentmods.dev/badge/skills/doancan/mags/mags-init.svg" alt="Measured on agentmods" height="20"></a>
Per session 11 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 942 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 5.1 $0.00011 $0.00942
Opus 5 $0.00005 $0.00471
Sonnet 5 $0.00002 $0.00188
Haiku 4.5 $0.00001 $0.00094

Measured 5d ago against content hash b63ca93e5d5f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

mags-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 5d 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/mags-init/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MAGS Init

Initialize the Memory And Guidance System for this project.

Steps

1. Check existing state

Check if a docs/ directory already exists in the project root. Also check for .mags/ directory and any existing CLAUDE.md.

Use Glob to scan for docs/**/*.md and check for .mags/config.yaml.

2A. If docs/ exists — Index existing documentation

Report what was found:

  • Number of documents in docs/
  • List the top-level structure

Call mags_list_docs to see if MAGS already has indexed documents. If not, read each markdown file in docs/ and call mags_create_doc to index them into MAGS.

Tell the user: "Found existing docs/ directory with N documents. Indexed into MAGS."

2B. If docs/ does not exist — Gather project info

Ask the user these questions (all at once, not one by one):

  1. What is this project? (brief description)
  2. What is the tech stack?
  3. What is the current state? (new, in progress, mature)
  4. What is the architecture type? (monolith, microservices, library, cli, mobile, serverless)
  5. What language should documentation be in? (en, tr, or other locale)

Call mags_detect_stack to auto-detect the project's tech stack. Use this information to enrich the docs.

Then create the docs/ directory structure using mags_create_doc with these templates. Pass the user's chosen locale (from question 5) as the locale parameter to each mags_create_doc call:

  • docs/architecture/overview.md — Project overview from user answers
  • docs/architecture/tech-stack.md — Tech stack details
  • docs/rules/coding-standards.md — Basic coding standards for the stack
  • docs/changelog/changes.md — Empty changelog

Stop here and wait for user answers before creating docs.

3. Create .mags/ directory

Create the following structure:

.mags/
  config.yaml    — MAGS configuration

config.yaml content:

version: 1
project_root: .
docs_path: docs/
locale: <user's chosen locale from question 5, e.g. "en" or "tr">
initialized_at: <current ISO date>

Read the full file on GitHub · 113 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. 5d ago First seen · 113 lines · 11 tokens per session scan A b63ca93e5d5f

Subscribe to this mod's changes

mags-init is a skill published in the GitHub repository doancan/mags (3 stars, last pushed 7mo ago), licensed MIT. It adds 11 tokens to every session and 942 once invoked, about $0.0001 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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