ClaudSkills / General / agents-skills-meta

Check Subagent

Q: What is a Claude Code skill and how does the Check Subagent 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. Check Subagent 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: agents-skills-meta · Last updated: 2026-06-15

type:audit type:review

Audits Claude Code custom subagent definitions against deterministic Tier-1 checks (location, frontmatter shape, naming, `tools` hygiene, prompt size, body structure, secret patterns) and seven judgment dimensions (scope discipline, routing-description quality, tool proportionality, output contract, voice & framing, failure behavior, injection surface). Use when the user wants to "audit a subagent", "review agent permissions", or "validate a subagent definition". Not for skills (route to `/build:check-skill`), hooks (route to `/build:check-hook`), or rules (route to `/build:check-rule`).

Security AStatic scan found no risk patternsHow grading works ›

About this skill (catalog notes)

Check Subagent includes pricing or quota commentary; at least one code block. The SKILL.md runs to about 1,010 words, in the catalog's typical mid-range.

License: MIT
Original author: bcbeidel
Indexed lastmod: 2026-06-15
Catalog position: General · agents-skills-meta
Indexed related skills: 10

How Check Subagent fits the catalog

Check Subagent sits in the General category under the agents-skills-meta 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

Audit Claude Code custom subagent definitions for structural soundness, tool-scope hygiene, routing-contract clarity, and safety posture. The rubric — what makes a subagent load-bearing, the file anatomy, the patterns that work — lives in [subagent-best-practices.md](../../_shared/references/subagent-best-practices.md).

What this skill does

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

When to invoke it: Use when the user wants to "audit a subagent", "review agent permissions", or "validate a subagent definition". Not for skills (route to `/build:check-skill`), hooks (route to `/build:check-hook`), or rules (route to `/build:check-rule`).

Who uses this skill

The Check Subagent 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 157,000+ 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/check-subagent
curl -L https://claudskills.com/skills/check-subagent/SKILL.md \
  -o ~/.claude/skills/check-subagent/SKILL.md

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

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

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

What does the Check Subagent 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 Check Subagent skill?

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

What is a Claude Code skill and how does the Check Subagent 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. Check Subagent 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/bcbeidel/toolkit/blob/HEAD/plugins/build/skills/check-subagent/SKILL.md
License: MIT
Author: bcbeidel

Cite this skill

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

APA

bcbeidel. (2026). Check Subagent [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/check-subagent/

BibTeX

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

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

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

Security scan

Grade A · scanned 2026-07-22 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 1 of 10 categories (filesystem), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
⚠ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/check-subagent/#security)

More General skills

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

Browse all General skills → Top 100 skills

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

Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore