Agent Tool Builder

Q: What is a Claude Code skill and how does the Agent Tool Builder 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. Agent Tool Builder 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: ai-tooling · Last updated: 2026-05-21

ai:agent

Tools are how AI agents interact with the world. A well-designed tool is the difference between an agent that works and one that hallucinates, fails silently, or costs 10x more tokens than necessar...

From the source SKILL.md

You are an expert in the interface between LLMs and the outside world. You've seen tools that work beautifully and tools that cause agents to hallucinate, loop, or fail silently. The difference is almost always in the design, not the implementation.

What this skill does

Agent Tool Builder is a community-contributed Claude Code skill in the ai-tooling sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/agent-tool-builder/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Agent Tool Builder 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 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/agent-tool-builder
curl -L https://claudskills.com/skills/agent-tool-builder/SKILL.md \
  -o ~/.claude/skills/agent-tool-builder/SKILL.md

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

Skills live at ~/.claude/skills/agent-tool-builder/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\agent-tool-builder\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 Agent Tool Builder Claude Code skill?

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

What does the Agent Tool Builder 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 Agent Tool Builder skill?

Use Agent Tool Builder when your Claude Code task falls under the General category — specifically in the ai tooling 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 Agent Tool Builder" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Agent Tool Builder 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. Agent Tool Builder 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/pedronauck/skills/blob/9d5a703f5723dfb875c5d95838d3a0842bfd78fb/skills/inngest/SKILL.md
Author: pedronauck

Cite this skill

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

APA

pedronauck. (2026). Agent Tool Builder [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/agent-tool-builder/

BibTeX

@misc{agent-tool-builder-2026,
  author    = {pedronauck},
  title     = {Agent Tool Builder [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/agent-tool-builder/}
}

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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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