agent-creator

agent-creator is a skill for Claude Code, Codex from humaisali/Awesome-AI-Skills. It costs 22 tokens per session (2,537 once invoked), scanned A, original, MIT.

A skill for creating custom AI subagents, which are separate task-focused assistants, inside properly structured plug-ins.

In plain words
What is it for?
It gathers requirements, creates the agent structure and persona, and can add a companion skill that routes matching tasks to the new agent.
Why use it?
It removes the repetitive work of designing an agent persona and arranging the folders and configuration needed to invoke it.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents; mentions Codex.

Good fit It gathers requirements, creates the agent structure and persona, and can add a companion skill that routes matching tasks to the new agent.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/humaisali/awesome-ai-skills/agent-creator
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.

Any agent
npx skills add humaisali/Awesome-AI-Skills --skill agent-creator
Clone the repo
git clone --depth 1 https://github.com/humaisali/Awesome-AI-Skills

Made for: Claude Code, Codex.

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 agent-creator

README.md
[![agentmods](https://agentmods.dev/badge/skills/humaisali/awesome-ai-skills/agent-creator/github.svg)](https://agentmods.dev/skills/humaisali/awesome-ai-skills/agent-creator)
Your own site
<a href="https://agentmods.dev/skills/humaisali/awesome-ai-skills/agent-creator"><img src="https://agentmods.dev/badge/skills/humaisali/awesome-ai-skills/agent-creator/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for agent-creator

Your own site · 80×15
<a href="https://agentmods.dev/skills/humaisali/awesome-ai-skills/agent-creator"><img src="https://agentmods.dev/badge/skills/humaisali/awesome-ai-skills/agent-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,537 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00022 $0.02537
Opus 5 $0.00011 $0.01269
Sonnet 5 $0.00004 $0.00507
Haiku 4.5 $0.00002 $0.00254

Measured 10d ago against content hash f77e0879895e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

agent-creator scanned grade A with 0 findings 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 10d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

AI-ML & Data Science Skills/Agents & LLMs/agent-creator/SKILL.md · 261 lines

How it starts

The opening of the file, as written. The whole thing — 261 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Creator

A skill for creating custom subagents packaged inside proper plugins. This skill handles the entire flow: gathering requirements, generating a rich persona from even a one-line description, scaffolding the correct folder structure, and optionally creating a companion skill that auto-routes tasks to the new agent.

When to use

Use this skill whenever you need a dedicated, isolated "brain" to handle a specific repetitive task, or when you find yourself repeatedly pasting the same massive system prompt or constraints into the main chat. Creating a dedicated subagent keeps the main conversation lightweight and focused.

Why this exists

Subagents live inside plugins at <appDataDir>\config\plugins\. For a subagent to be properly registered and invokable, it needs to be inside a plugin's agents/ directory with a valid plugin.json. Getting this structure right manually is tedious and error-prone. This skill automates the entire process so the user can go from "I want an agent that reviews code" to a fully functional, properly structured subagent in under a minute.

Target directory

All agents are created inside plugins at:

<appDataDir>\config\plugins\<plugin-name>\

If the user wants the agent inside an existing plugin, add the agent folder to that plugin's agents/ directory. If no plugin is specified, create a new plugin named <agent-name>-plugin.

Before creating any path, validate both <agent-name> and <plugin-name>:

  • accept only lowercase letters, numbers, and single hyphens: ^[a-z0-9]+(-[a-z0-9]+)*$
  • reject /, \, ., .., absolute paths, whitespace, shell metacharacters, and YAML metacharacters
  • resolve the final target path and verify it stays under <appDataDir>\config\plugins\
  • stop and ask for a safe replacement instead of sanitizing a suspicious name silently

Workflow

Follow these steps in order. Do NOT skip the interview — even a one-line description from the user needs to be expanded into a proper persona.

Read the full file on GitHub · 261 lines

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. 10d ago First seen · 261 lines · 22 tokens per session scan A f77e0879895e

Subscribe to this mod's changes

agent-creator is a skill published in the GitHub repository humaisali/Awesome-AI-Skills (5 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 2,537 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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