What is sub-agent-creator?

A tool for creating, editing, converting, and checking ChatLuna sub-agent Markdown files. Sub-agents are specialised AI workers with defined instructions and permissions.

Use it when adding or refining ChatLuna sub-agents, including their prompts, allowed tools, models, turn limits, and storage locations.

It helps keep sub-agent goals, output formats, tools, skills, and limits explicit and consistent. This makes specialised agents easier to create and maintain.

sub-agent-creator — Skill for Claude Code and Codex by ChatLunaLab

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 ChatLunaLab/chatluna --skill sub-agent-creator

Clone the repo

git clone --depth 1 https://github.com/ChatLunaLab/chatluna

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/chatlunalab/chatluna/sub-agent-creator/github.svg)](https://agentmods.dev/skills/chatlunalab/chatluna/sub-agent-creator)

Your own site

<a href="https://agentmods.dev/skills/chatlunalab/chatluna/sub-agent-creator"><img src="https://agentmods.dev/badge/skills/chatlunalab/chatluna/sub-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/chatlunalab/chatluna/sub-agent-creator"><img src="https://agentmods.dev/badge/skills/chatlunalab/chatluna/sub-agent-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,590 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00109	$0.02590
Opus 5.5	$0.00044	$0.01036
Sonnet 5.5	$0.00022	$0.00518
Haiku 4.5	$0.00011	$0.00259

Measured 1mo ago against content hash aafa6128f2d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sub-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 1mo 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.

packages/extension-agent/resources/skills/sub-agent-creator/SKILL.md · 363 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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.

1mo ago First seen · 363 lines · 109 tokens per session scan A aafa6128f2d7

Subscribe to this mod's changes

sub-agent-creator is a skill published in the GitHub repository ChatLunaLab/chatluna (444 stars, last pushed 4d ago), licensed AGPL-3.0. It adds 109 tokens to every session and 2,590 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-30.

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