sub-agent

sub-agent is a skill for Claude Code, Codex from Wide-Moat/open-computer-use. It costs 85 tokens per session (1,784 once invoked), scanned B, original, no licence file.

A tool for starting a separate coding-agent session to work on complex programming tasks. It is intended for work that needs many rounds of editing, testing, or code review.

In plain words
What is it for?
Use it for multi-file refactoring, code reviews followed by fixes, and repeated test-and-fix work.
Why use it?
It separates demanding coding work from the main session, but is meant for substantial tasks rather than quick changes.

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/wide-moat/open-computer-use/sub-agent
Any agent
npx skills add Wide-Moat/open-computer-use --skill sub-agent
Clone the repo
git clone --depth 1 https://github.com/Wide-Moat/open-computer-use

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 sub-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/wide-moat/open-computer-use/sub-agent.svg)](https://agentmods.dev/skills/wide-moat/open-computer-use/sub-agent)
Your own site
<a href="https://agentmods.dev/skills/wide-moat/open-computer-use/sub-agent"><img src="https://agentmods.dev/badge/skills/wide-moat/open-computer-use/sub-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,784 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 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 $0.00085 $0.01784
Opus 5 $0.00043 $0.00892
Sonnet 5 $0.00017 $0.00357
Haiku 4.5 $0.00009 $0.00178

Measured 4d ago against content hash e85988bbe59d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

sub-agent scanned grade B 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 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/list_subagent_models.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

find ~/.claude/projects -name "*.jsonl" -mmin -30
skills/public/sub-agent/SKILL.md · 187 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

Files

What ships with it

3 files 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.

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 · 187 lines · 85 tokens per session scan B e85988bbe59d

Subscribe to this mod's changes

sub-agent is a skill published in the GitHub repository Wide-Moat/open-computer-use (118 stars, last pushed 9d ago), with no licence file. It adds 85 tokens to every session and 1,784 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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