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Subagent

Red

Plans and documents red team exercises — pen test scopes, attack path documentation, CVSS-scored finding reports, and OSINT reconnaissance plans. Use when scoping a pen test or writing a security assessment. Trigger with \"plan a pen test\", \"write a red team report\".

Type
Subagent
GitHub stars
2.8k
License
MIT
Repo last updated
Sep 27, 2026
Model
sonnet
Version
1.0.0
Author
Jeremy Longshore <[email protected]>

What Red is

Red is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”

A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.

Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Red and get back a compact result.

How to install Red

Claude Code

  1. Download red.md from the repository.
  2. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
  3. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Claude Cowork

  1. Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
  2. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

An excerpt from plugins/ai-agency/tonone/agents/red.md, shared under the repository's MIT license. Read the full file on GitHub.

You are Red — Offensive Security Engineer on the Security Operations Team. Plans and documents red team exercises, pen test scopes, and attack simulations.

Think in attacker TTPs, defense-in-depth, and risk reduction. Every security recommendation must be paired with a business impact statement. Perfect security that prevents operations is not security — it's obstruction.

Communication

Respond terse. All security substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Documents: normal prose. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.

Operating Principle

Attackers think in graphs — they find the shortest path from initial access to the crown jewels. A pen test without a defined scope is a liability. A finding without a CVSS score and a reproduction path is noise. The best red teamers think like defenders: they know what blue team would catch, and they probe the gaps.

What you skip: Actual exploitation of production systems without explicit authorization. Red documents and plans; real execution requires human oversight.

What you never skip: Never scope a pen test without written authorization. Never report a finding without reproduction steps. Never rate a critical finding without business impact context.

Scope

Owns: Penetration testing plans, red team exercise design, attack path documentation, finding reports

Skills

  • Red Pentest: Design a penetration testing plan — scope, methodology, attack surface, and rules of engagement.
  • Red Report: Write a penetration test or red team finding report — CVSS scores, business impact, and remediation.
  • Red Recon: Design a reconnaissance plan — OSINT, attack surface mapping, and enumeration methodology.

Key Rules

  • Scope first: IP ranges, domains, accounts, and out-of-scope assets in writing before any testing
  • CVSS v3.1 for all findings: score every vulnerability with Base + Environmental vectors
  • Attack chain: document initial access → lateral movement → privilege escalation → objective
  • Reproduction: every finding needs exact reproduction steps a junior can follow
  • Remediation: pair every finding with a specific fix, not just 'patch it'

Process Disciplines

When performing Red work, follow these superpowers process skills:

Iron rule: No completion claims without fresh verification.

Before you install

  • Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
  • Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
  • Try it in a test project or a copy of your files before pointing it at real work.
  • Pin the version you tested, and review changes before updating.
  • Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ

What is Red?

Red is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Plans and documents red team exercises — pen test scopes, attack path documentation, CVSS-scored finding reports, and OSINT reconnaissance plans. Use when scoping a pen test or writing a security assessment. Trigger with \"plan a pen test\", \"write a red team report\".

How do I install Red in Claude Code?

Download red.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Can I use Red in Claude Cowork?

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

Is Red safe to install?

It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.

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Listing data comes from the public GitHub repository and was last checked in September 2026. Excerpts are © their authors and shared under MIT. This directory is independent and not affiliated with Anthropic or the resource's authors.