create-subagent

create-subagent is a skill for Claude Code, Codex from kensaurus/cursor-kenji. It costs 49 tokens per session (1,380 once invoked), scanned A, a copy of create-subagent, MIT.

A guide for creating custom subagents: specialised AI assistants with their own task instructions and configuration.

In plain words
What is it for?
Use it to create project or personal subagents for jobs such as code review, debugging, or domain-specific assistance.
Why use it?
It helps separate focused work from the main conversation and reuse assistants for recurring tasks.

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/kensaurus/cursor-kenji/create-subagent
Any agent
npx skills add kensaurus/cursor-kenji --skill create-subagent
Clone the repo
git clone --depth 1 https://github.com/kensaurus/cursor-kenji

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 create-subagent

README.md
[![agentmods](https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/create-subagent.svg)](https://agentmods.dev/skills/kensaurus/cursor-kenji/create-subagent)
Your own site
<a href="https://agentmods.dev/skills/kensaurus/cursor-kenji/create-subagent"><img src="https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/create-subagent.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,380 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 95% 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 $0.00049 $0.01380
Opus 5 $0.00024 $0.00690
Sonnet 5 $0.00010 $0.00276
Haiku 4.5 $0.00005 $0.00138

Measured yesterday against content hash f95da1c06b82, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create-subagent 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 yesterday.

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

95% identical to create-subagent — 5 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.

skills-cursor/create-subagent/SKILL.md · 223 lines

How it starts

The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Creating Custom Subagents

This skill guides you through creating custom subagents for Cursor. Subagents are specialized AI assistants that run in isolated contexts with custom system prompts.

When to Use Subagents

Subagents help you:

  • Preserve context by isolating exploration from your main conversation
  • Specialize behavior with focused system prompts for specific domains
  • Reuse configurations across projects with user-level subagents

Inferring from Context

If you have previous conversation context, infer the subagent's purpose and behavior from what was discussed. Create the subagent based on specialized tasks or workflows that emerged in the conversation.

Subagent Locations

Location Scope Priority
.cursor/agents/ Current project Higher
~/.cursor/agents/ All your projects Lower

When multiple subagents share the same name, the higher-priority location wins.

Project subagents (.cursor/agents/): Ideal for codebase-specific agents. Check into version control to share with your team.

User subagents (~/.cursor/agents/): Personal agents available across all your projects.

Subagent File Format

Create a .md file with YAML frontmatter and a markdown body (the system prompt):

---
name: code-reviewer
description: Reviews code for quality and best practices
---

You are a code reviewer. When invoked, analyze the code and provide
specific, actionable feedback on quality, security, and best practices.

Required Fields

Field Description
name Unique identifier (lowercase letters and hyphens only)
description When to delegate to this subagent (be specific!)

Writing Effective Descriptions

The description is critical - the AI uses it to decide when to delegate.

# ❌ Too vague
description: Helps with code

# ✅ Specific and actionable
description: Expert code review specialist. Proactively reviews code for quality, security, and maintainability. Use immediately after writing or modifying code.

Read the full file on GitHub · 223 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. yesterday First seen · 223 lines · 49 tokens per session scan A f95da1c06b82

Subscribe to this mod's changes

create-subagent is a skill published in the GitHub repository kensaurus/cursor-kenji (9 stars, last pushed 7d ago), licensed MIT. It adds 49 tokens to every session and 1,380 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to create-subagent, differing in 5 lines, and is treated as a copy.

Related

Other skills, from other repositories

comprehensive-enrichment

Enrich any person or company from any identifier — email, name, LinkedIn URL, domain, company name, Twitter/X handle. Use when asked to enrich, look up, or research a lead, contact, person, or company.

gooseworks-ai/goose-skills · 53 tokens

paid-channel-prioritizer

For founders who don't know where to start with paid ads. Analyzes ICP, competitor ad presence, budget constraints, and product type to recommend which 1-2 paid channels to start with and provides a 90-day ramp plan. Prevents the common mistake of spreading a small budget across too many platforms.

gooseworks-ai/goose-skills · 70 tokens

data-charts-tako

Search and visualize the world's data - get charts, insights, and embeddable knowledge cards for finance, economics, demographics, sports, and more.

gooseworks-ai/goose-skills · 35 tokens

lead-discovery

Orchestrator that runs first for lead generation requests. Gathers business context via website analysis or questions, identifies competitors, builds ICP, and routes to signal skills with pre-filled inputs.

gooseworks-ai/goose-skills · 41 tokens

render-cosmic-mythology-voiceover

Assemble a cosmic-mythology-voiceover reel from a config — a warm spoken voiceover carries the whole narrative while N curated cosmic stills are weighted beat-synced across the delivered VO duration (cutdur = VOdur times weight over the weight sum, so emotional beats hold longer), Ken-Burns-zoomed per still (scale 2x…

gooseworks-ai/goose-skills · 223 tokens

review-scraper

Scrape product reviews from G2, Capterra, and Trustpilot using Apify. Single script with platform dispatch. Use when you need to monitor competitor reviews, track product sentiment, or gather customer feedback from review sites.

gooseworks-ai/goose-skills · 51 tokens