ai-agent-builder

ai-agent-builder is a skill for Claude Code from dair-ai/dair-cc-plugins. It costs 54 tokens per session (13,500 once invoked), scanned C, original, no licence file.

A guide for building applications made from multiple AI agents using the Claude Agent SDK. It covers orchestrators, Exa search, live SSE updates, and Vercel Sandbox deployment.

In plain words
What is it for?
Use it to build multi-agent systems with an orchestrator, add Exa search, stream updates with SSE, or deploy through Vercel Sandbox.
Why use it?
It provides a progression from simple agents to multi-agent pipelines, reducing the need to design that structure from scratch.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the ai-agent-builder plugin — 1 skill shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/dair-ai/dair-cc-plugins/web-builder
Any agent
npx skills add dair-ai/dair-cc-plugins --skill web-builder
Clone the repo
git clone --depth 1 https://github.com/dair-ai/dair-cc-plugins

Made for: Claude Code.

Or install ai-agent-builder, the plugin that ships this one along with the rest of its 1 skill.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ai-agent-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/dair-ai/dair-cc-plugins/web-builder.svg)](https://agentmods.dev/skills/dair-ai/dair-cc-plugins/web-builder)
Your own site
<a href="https://agentmods.dev/skills/dair-ai/dair-cc-plugins/web-builder"><img src="https://agentmods.dev/badge/skills/dair-ai/dair-cc-plugins/web-builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 13,500 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00054 $0.13500
Opus 5 $0.00027 $0.06750
Sonnet 5 $0.00011 $0.02700
Haiku 4.5 $0.00005 $0.01350

Measured 6d ago against content hash 59763109363e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade C, and why

ai-agent-builder scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

if (toolName === "Bash" && inputData.command?.includes("rm -rf")) {
plugins/ai-agent-builder/skills/web-builder/SKILL.md · 2,011 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 2,011 lines · 54 tokens per session scan C 59763109363e

Subscribe to this mod's changes

ai-agent-builder is a skill published in the GitHub repository dair-ai/dair-cc-plugins (2 stars, last pushed 7mo ago), with no licence file. It adds 54 tokens to every session and 13,500 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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