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
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Source file
- plugins/ai-agency/tonone/agents/red.md
- 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
- 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.
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.
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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