The Red Team Handbook

Every consequential decision begins as a story about the future. We tell ourselves what is happening, what matters, what other people will do, and why our plan should work.

The trouble is that a convincing story can still be wrong.

We miss what does not fit our expectations. We fill gaps with assumptions. In groups, we take confidence for evidence and silence for agreement. Under pressure, the first plausible answer can quickly become the only answer anyone is willing to discuss.

Red teaming is the practice of interrupting that certainty before reality does it for us.

This handbook is about learning to see a decision from more than one angle: to notice the frame around a problem, make hidden assumptions visible, invite dissent without turning disagreement into combat, and test what you believe while there is still time to change course.

It is not a handbook for cynics. The aim is not to defeat an idea or prove that nothing will work. The aim is to give good ideas a harder examination, weak ideas an honest ending, and decision-makers a clearer view of what they are choosing.

Begin here: Chapter 1 — Foundational Concepts

How this book works

Ideas become useful when there is something at stake. Each chapter therefore unfolds through a case study in the tradition of the Harvard Business School case method: a consequential situation, incomplete information, competing perspectives, and a decision that cannot be escaped by turning to an answer key.

You will meet the chapter’s concepts and tools, techniques, and practices—its TTPs—inside that narrative. The case gives them a job to do. You will be asked to notice what the people involved cannot yet see, sit with the uncertainty they face, and decide what you would do before reading on.

The cases build as the book does. Each chapter adds another way of seeing and another set of practices to use. By the final chapter, those accumulated ideas come together in the full “spell book”: the complete working collection of RedTeam concepts and TTPs, ready to combine and adapt rather than recite by rote.

The journey through this book

The book begins with the foundations of red teaming: what the practice is, what it is for, and the principles that keep challenge useful rather than performative.

From there, the focus turns inward. Before you can challenge another person’s reasoning, you need some awareness of your own habits of mind, identity, temperament, and emotional reactions. Self-awareness and reflection are not warm-up exercises; they are part of the method.

The view then widens. Cultural empathy asks how people with different histories, incentives, and worldviews can look at the same facts and see different realities. Applied critical thinking turns that awareness into a repeatable discipline, including when time is short.

Because important decisions are rarely made alone, the next chapters move into group process and decision support and creative thinking: how to protect dissent, escape the first answer, and move from many possibilities toward a defensible choice.

The final chapters confront the practice as it exists now. Red teaming with AI and humans in the loop examines what machines can contribute, where they mislead, and why judgment and accountability remain human. The book closes by opening the full spell book of tools, techniques, and practices you can combine to put these ideas to work.

Choose your way in

Dive into the handbook if red teaming is new to you. Read the chapters in order, follow the cases, make the decisions yourself, and build from a way of seeing to a way of working.

Jump straight to what you need if a live decision brought you here. Browse the concepts when you need a way to understand what is happening, or the TTPs when you need a way to act. You can also start with the question that feels most urgent:

• Are we solving the right problem? Try Problem Restatement or a Frame Audit.
• What are we taking for granted? Run a Key Assumptions Check.
• Have we fallen in love with one explanation? Use Analysis of Competing Hypotheses.
• Is the room agreeing too easily? Begin with Think–Write–Share or examine Groupthink.
• What happens if this succeeds—and then creates a new problem? Trace the Second-Order Effects.
• How could this fail? Conduct a Premortem Analysis and define Kill Criteria.

The concept library explains the ideas behind the practice. The technique library provides exercises for a particular moment. Neither is meant to replace judgment. A tool is useful only when it helps people see more clearly.

A note on this edition

This is Version 10 of The Red Team Handbook, maintained by Curate Labs and adapted for civilian, organizational, and AI-assisted decision-making. It succeeds the UFMCS Version 9 handbook while preserving the lineage of ideas that remain useful.

For provenance, scope, and adaptation decisions, see Source & lineage. For the software that implements this material, see the RedTeam skill.