mags-docs-validate

mags-docs-validate is a skill for Claude Code, Codex from doancan/mags. It costs 10 tokens per session (405 once invoked), scanned A, original, MIT.

A checker for project documentation that reviews documents for required sections, links, freshness, and, in deeper checks, consistency and structure. It reports problems by severity.

In plain words
What is it for?
Use it to run standard or deep documentation checks and, when asked, fix the reported issues in the affected files.
Why use it?
It finds missing information, broken internal links, outdated documents, and conflicting guidance before they mislead developers.

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-docs-validate
Any agent
npx skills add doancan/mags --skill mags-docs-validate
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-docs-validate

README.md
[![agentmods](https://agentmods.dev/badge/skills/doancan/mags/mags-docs-validate.svg)](https://agentmods.dev/skills/doancan/mags/mags-docs-validate)
Your own site
<a href="https://agentmods.dev/skills/doancan/mags/mags-docs-validate"><img src="https://agentmods.dev/badge/skills/doancan/mags/mags-docs-validate.svg" alt="Measured on agentmods" height="20"></a>
Per session 10 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 405 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 $0.00010 $0.00405
Opus 5 $0.00005 $0.00202
Sonnet 5 $0.00002 $0.00081
Haiku 4.5 $0.00001 $0.00040

Measured 4d ago against content hash 55852efc0749, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mags-docs-validate 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/mags-docs-validate/SKILL.md · 54 lines

What it actually says

MAGS Docs Validate

Run validation checks on all project documents.

Usage

/mags-docs-validate

Steps

  1. Ask the user: "Standard validation or deep validation?"

    • Standard — checks frontmatter, required sections, cross-references, freshness
    • Deep — all standard checks plus: version conflict detection, memory-doc consistency, ADR structure validation, and module completeness checks

    If deep: call mags_validate_docs with deep: true. If standard (or no preference): call mags_validate_docs with default parameters.

  2. Display results grouped by severity:

    == Document Validation ==
    
    Errors (must fix):
      - docs/architecture/overview.md: Missing required section "Tech Stack"
      - docs/rules/backend.md: Broken internal link to ../api/auth.md
    
    Warnings (should fix):
      - docs/modules/auth.md: No code examples found
      - docs/changelog/changes.md: Last updated over 30 days ago
    
    Passed: <N>/<total> documents are healthy
    
  3. If there are errors, ask: "Would you like me to fix the errors?"

  4. If yes, read each problematic doc with mags_get_doc, fix the issues, and call mags_update_doc.


Related commands:

Command Description
/mags-docs List all project documents
/mags-docs-search <query> Search across all documents
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 · 54 lines · 10 tokens per session scan A 55852efc0749

Subscribe to this mod's changes

mags-docs-validate is a skill published in the GitHub repository doancan/mags (3 stars, last pushed 7mo ago), licensed MIT. It adds 10 tokens to every session and 405 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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