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.
npx skills add eaglesakura/agent-skills --skill agent-call-sub-agentgit clone --depth 1 https://github.com/eaglesakura/agent-skillsWrote 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.
[](https://agentmods.dev/skills/eaglesakura/agent-skills/agent-call-sub-agent)<a href="https://agentmods.dev/skills/eaglesakura/agent-skills/agent-call-sub-agent"><img src="https://agentmods.dev/badge/skills/eaglesakura/agent-skills/agent-call-sub-agent/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.
<a href="https://agentmods.dev/skills/eaglesakura/agent-skills/agent-call-sub-agent"><img src="https://agentmods.dev/badge/skills/eaglesakura/agent-skills/agent-call-sub-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00131 | $0.01255 |
| Opus 5 | $0.00066 | $0.00628 |
| Sonnet 5 | $0.00026 | $0.00251 |
| Haiku 4.5 | $0.00013 | $0.00126 |
Grade A, and why
agent-call-sub-agent 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent / Call Sub Agent
Sub Agent はクリーンコンテキストで起動し、親の Skills カタログを自動継承しない。 必要な手順書を渡さないと、子は関連規約を知らないまま作業する。 本 SKILL は親が起動直前に関連 SKILL を選定し、パスと description だけを prompt に載せる。 子は記載された description を見て、必要に応じて Apply(本文ロード)する。
いつ使うか
- Task tool で Sub Agent を起動する直前
- カスタム Agent(
.cursor/agents/*.md)へ委任する直前
手順
1. 選定ソースを集める
次の2系統を必ず見る。
- 親の利用可能 SKILL(
available_skills等に提示されている一覧) - 起動先 Sub Agent 定義の必須 SKILL
- 第一ソース: 本文
## 追加コンテキストのRequired:行(SKILL のname) - 後方互換:
metadata.required_skills、本文の「必須ロード」「関連SKILL」等(現行テンプレ以前の定義向け) - これらに記載があるものは 必須(description 照合の結果によらず必ず含める)
Optional:は必須ではない。委任内容に応じて親が追加選定してよい
- 第一ソース: 本文
本 SKILL(agent-call-sub-agent)自身は子へ渡さない。親専用である。
2. 親の判断で追加選定する
必須分以外は、各 SKILL の description と 今回の委任内容(prompt / 作業範囲) を照合し、
子が作業を完遂するために参照すべきものを親が選ぶ。
- 関連が薄いものは載せない(ノイズを避ける)
- 件数の上限はない。必要なら複数すべて載せる
- 迷ったら「子が読んで損しないか」より「読まないと規約違反・手順欠落になりそうか」で決める
3. Path を絶対パスにする
Pathは SKILL ディレクトリ の絶対パスとする(SKILL.mdファイルパスではない)- Sub Agent 定義の相対リンク(例:
../skills/foo/SKILL.md)は、定義ファイル位置から解決してディレクトリ絶対パスにする
4. prompt 末尾へブロックを追加する
選定結果が 1件以上 あるときだけ、Sub Agent への prompt 末尾に次を付ける。 0件ならブロック全体を省略する(「該当なし」等も書かない)。
---
# 追加コンテキスト
## SKILLサジェスト
* 記載されたDescriptionから、必要に応じてApplyすること
### {SKILL名}
* Path: {SKILLディレクトリの絶対パス}
{そのSKILLのdescription}
複数ある場合は ### {SKILL名} セクションを並べる。
記入例
---
# 追加コンテキスト
## SKILLサジェスト
* 記載されたDescriptionから、必要に応じてApplyすること
### example-domain-rules
* Path: /path/to/repo/.agents/skills/example-domain-rules
ドメイン固有の規約を定義する SKILL。
「この領域のルールに従って」…(description全文)
### example-workflow-design
* Path: /path/to/repo/.agents/skills/example-workflow-design
(description全文)
5. 子側の期待動作(親は本文を埋め込まない)
- 親は Path と description のみ を渡す。SKILL 本文の要約・全文埋め込みはしない
- 子は
## SKILLサジェストの指示どおり、description を見て必要なら Path 先のSKILL.mdを Apply する
ガードレール
- Sub Agent を起動しないターンでは、本 SKILL のブロックを作らない
- 必須(Sub Agent 定義記載)を description 照合で落とさない
- description を勝手に言い換えない(frontmatter / 提示文言をそのまま載せる)
- Path を相対のまま残さない
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 111 lines · 131 tokens per session scan A 73a5a6960eb9
agent-call-sub-agent is a skill published in the GitHub repository eaglesakura/agent-skills (2 stars, last pushed 3d ago), licensed MIT. It adds 131 tokens to every session and 1,255 once invoked, about $0.0007 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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