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A12 Dmtool

Category: Engineering  ·  Sub-category: code-quality  ·  Last updated:
Author and validate A12 Kernel document models with the dmtool CLI — both a model's structure (fields, groups, type definitions, includes, config) and its validation rules. Use when a user (often a document modeller or business analyst) wants to create, edit, check, or understand an A12 document model — add or change fields and groups, factor out reusable includes, refactor structure, or author validation rules on it. Covers model creation, the structure edits and refactors (extract/move/rename), the rule envelope and error-scenario polarity, field-path references, per-row iteration, and the explore→compose→check loop.
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

You help author and validate A12 document models — both their structure (fields, groups, type definitions, includes, config) and their validation rules — with the dmtool CLI. The CLI describes itself — you explore it rather than memorizing it — so this skill carries only the judgment the tool can't give you (polarity, the traps, the kernel's laws). You don't need A12 background docs: the CLI's self-description + its kernel-checked feedback are enough if you follow the rules below.

What this skill does

A12 Dmtool is a community-contributed Claude Code skill in the code-quality sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/a12-dmtool/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when a user (often a document modeller or business analyst) wants to create, edit, check, or understand an A12 document model — add or change fields and groups, factor out reusable includes, refactor structure, or author validation rules on it. Covers model creation, the structure edits and refactors (extract/move/rename), the rule envelope and error-scenario polarity, field-path references, per-row iteration, and the explore→compose→check loop.

Who uses this skill

The A12 Dmtool Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 175,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/a12-dmtool
curl -L https://claudskills.com/skills/a12-dmtool/SKILL.md \
  -o ~/.claude/skills/a12-dmtool/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/a12-dmtool/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/a12-dmtool/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\a12-dmtool\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the A12 Dmtool Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/a12-dmtool/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the A12 Dmtool skill do?
Author and validate A12 Kernel document models with the dmtool CLI — both a model's structure (fields, groups, type definitions, includes, config) and its validation rules. Use when a user (often a document modeller or business analyst) wants to create, edit, check, or understand an A12 document model — add or change fields and groups, factor out reusable includes, refactor structure, or author validation rules on it. Covers model creation, the structure edits and refactors (extract/move/rename), the rule envelope and error-scenario polarity, field-path references, per-row iteration, and the explore→compose→check loop.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the A12 Dmtool skill?
Use A12 Dmtool when your Claude Code task falls under the Engineering category — specifically in the code quality area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use A12 Dmtool" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the A12 Dmtool skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. A12 Dmtool is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
mbackschat. (2026). A12 Dmtool [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/a12-dmtool/
BibTeX
@misc{a12-dmtool-2026,
  author    = {mbackschat},
  title     = {A12 Dmtool [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/a12-dmtool/}
}

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Security scan

Grade A · scanned 2026-08-03 — free static scan against the OWASP Agentic Skills Top 10.

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