Hallucination Check

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

Category: General · Sub-category: research-misc · Last updated: 2026-06-03

Citation-grounding verifier — for each claim in an LLM response, confirm support in the retrieved context, report ungrounded claims

About this skill (catalog notes)

Hallucination Check includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); pricing or quota commentary; at least one code block. The SKILL.md runs to about 1,034 words, in the catalog's typical mid-range.

License: Apache-2.0
Original author: bakw00ds
Indexed lastmod: 2026-06-03
Catalog position: General · research-misc
Indexed related skills: 10

How Hallucination Check fits the catalog

Hallucination Check sits in the General category under the research-misc 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.

What this skill does

Hallucination Check is a community-contributed Claude Code skill in the research-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/hallucination-check/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Hallucination Check Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 119,000+ 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/hallucination-check
curl -L https://claudskills.com/skills/hallucination-check/SKILL.md \
  -o ~/.claude/skills/hallucination-check/SKILL.md

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

Skills live at ~/.claude/skills/hallucination-check/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\hallucination-check\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 Hallucination Check Claude Code skill?

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

What does the Hallucination Check skill do?

Citation-grounding verifier — for each claim in an LLM response, confirm support in the retrieved context, report ungrounded claims

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 Hallucination Check skill?

Use Hallucination Check when your Claude Code task falls under the General category — specifically in the research misc 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 Hallucination Check" or describe the task and let Claude pick). Browse related skills at /category/general/.

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

Attribution & license

Source: https://github.com/bakw00ds/yakos/blob/HEAD/lib/skills/hallucination-check/SKILL.md
License: Apache-2.0
Author: bakw00ds

Cite this skill

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

APA

bakw00ds. (2026). Hallucination Check [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/hallucination-check/

BibTeX

@misc{hallucination-check-2026,
  author    = {bakw00ds},
  title     = {Hallucination Check [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/hallucination-check/}
}

Embed this skill

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Badge

[![ClaudSkills](https://claudskills.com/badge/hallucination-check.svg)](https://claudskills.com/skills/hallucination-check/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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