Util Ustagger

Q: What is a Claude Code skill and how does the Util Ustagger 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. Util Ustagger is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Product · Sub-category: prd-spec · Last updated: 2026-05-21

Tag new items in PRD.md files with unique ID codes and validate no duplicate tags exist. Applies to PRD.md documents structured with module sections containing User Stories, Non Functional Requirements, Constraints, References, and Test instructions. Each top-level bullet item gets a unique 9-character code with category prefix, application initials, and running number (interval of 3). Trigger on keywords: "tag user story", "tag user stories", "fix user story tag", "fix user story tags", "add IDs to requirements", "tag items in PRD.md", "number the requirements", "add requirement codes", "validate tags", "check duplicate tags", "verify tagging completeness". Accepts an application name and version as input (e.g., `/util-ustagger hub_middleware v1.0.3`, `/util-ustagger "Hub Middleware" v1.0.3`).

About this skill (catalog notes)

Util Ustagger includes at least one code block. The SKILL.md runs to about 999 words, in the catalog's typical mid-range.

Indexed lastmod: 2026-05-21
Catalog position: Product · prd-spec
Indexed related skills: 10

How Util Ustagger fits the catalog

Util Ustagger sits in the Product category under the prd-spec sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Tag untagged items in PRD.md files with unique 9-character ID codes and validate no duplicates. Covers User Stories, Non Functional Requirements, Constraints, References, and Test instructions.

What this skill does

Util Ustagger is a community-contributed Claude Code skill in the prd-spec sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/util-ustagger/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Util Ustagger Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ 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/util-ustagger
curl -L https://claudskills.com/skills/util-ustagger/SKILL.md \
  -o ~/.claude/skills/util-ustagger/SKILL.md

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

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

📱 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 Util Ustagger Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/util-ustagger/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Util Ustagger skill do?

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 Util Ustagger skill?

Use Util Ustagger when your Claude Code task falls under the Product category — specifically in the prd spec 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 Util Ustagger" or describe the task and let Claude pick). Browse related skills at /category/product/.

What is a Claude Code skill and how does the Util Ustagger 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. Util Ustagger is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Cite this skill

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

APA

ClaudSkills. (2026). Util Ustagger [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/util-ustagger/

BibTeX

@misc{util-ustagger-2026,
  author    = {ClaudSkills},
  title     = {Util Ustagger [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/util-ustagger/}
}

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Badge

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Browse all Product skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Product skills → Top 100 skills

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