child-skill

child-skill is a skill for Claude Code, Codex from code-yeongyu/senpi. It costs 12 tokens per session (31 once invoked), scanned A, a copy of child-skill, MIT.

A nested coding skill stored inside a subdirectory. It provides instructions for an agent to follow.

In plain words
What is it for?
It is for loading or documenting a skill located in a subdirectory.
Why use it?
It helps organize skills that belong inside a larger directory structure.

Skill for Claude CodeCodex

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/code-yeongyu/senpi/child-skill
Any agent
npx skills add code-yeongyu/senpi --skill child-skill
Clone the repo
git clone --depth 1 https://github.com/code-yeongyu/senpi

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 child-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/code-yeongyu/senpi/child-skill.svg)](https://agentmods.dev/skills/code-yeongyu/senpi/child-skill)
Your own site
<a href="https://agentmods.dev/skills/code-yeongyu/senpi/child-skill"><img src="https://agentmods.dev/badge/skills/code-yeongyu/senpi/child-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 31 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00012 $0.00031
Opus 5 $0.00006 $0.00015
Sonnet 5 $0.00002 $0.00006
Haiku 4.5 $0.00001 $0.00003

Measured 4d ago against content hash 0050995f1855, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

child-skill 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 4d 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

This is a copy

100% identical to child-skill — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

packages/coding-agent/test/fixtures/skills/nested/child-skill/SKILL.md · 9 lines

What it actually says

Child Skill

This skill is nested in a subdirectory.

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. 4d ago First seen · 9 lines · 12 tokens per session scan A 0050995f1855

Subscribe to this mod's changes

child-skill is a skill published in the GitHub repository code-yeongyu/senpi (411 stars, last pushed 4d ago), licensed MIT. It adds 12 tokens to every session and 31 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to child-skill, differing in 0 lines, and is treated as a copy.

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