VectorCertain LLC today announced the completion of manuscript-prep for The MYTHOS Playbook, a 34-chapter, 9-appendix technical reference designed for CISOs, security architects, and AI governance program leads operationalizing the new joint Five Eyes guidance on agentic AI security. The book closes its 17-sprint development cycle today and proceeds to June 2026 publication. A pre-order landing page is live at vectorcertain.com.
On May 1, 2026, six national cybersecurity agencies representing all five Five Eyes nations—CISA, NSA, Australia's ASD ACSC, the Canadian Centre for Cyber Security, NZ NCSC, and UK NCSC—jointly published "Careful Adoption of Agentic AI Services". It is the first coordinated multi-government security guidance specifically addressing agentic AI systems, moving autonomous-agent risk from "emerging vendor problem" to "critical national infrastructure" classification. The guidance identifies five risk classes: privilege, design and configuration, behavioral, structural, and accountability.
The market context is severe. Gartner projects AI agents will be embedded in 40% of enterprise applications by end of 2026. One in eight enterprise breaches now involves AI agents—a 340% year-over-year increase, with 78% of compromised agents over-permissioned, according to Digital Applied. Analysis of 18,470 production agent configurations found 98.9% lack deny rules entirely, as reported by Arun Baby. The Centre for Long-Term Resilience documented 698 real-world AI deception incidents in a single six-month window.
Every risk class identified in the Five Eyes guidance maps to specific MYTHOS Playbook chapters and appendices. Privilege risks are addressed in Part II Architecture (Ch. 4-12) with patent-form least-privilege architecture across MRM-CFS-SG governance gates. Design and configuration risks are covered in Part II and Part VI Deployment, plus Appendix G's 12-clause vendor RFP language library. Behavioral risks map to Part III Vectors (Ch. 13-19) with a seven-vector behavioral threat taxonomy and Part IV Frameworks (Ch. 20-25) with statistical detection methodology including HOTS Homology (81.4% deception-detection precision). Structural risks are addressed in Ch. 8's 8-2-8 compositional safety model and Part V SOC/Detection, with Appendix C delivering a 119-cell framework cross-walk matrix mapping mitigations across NIST AI RMF, OWASP LLM Top 10, OWASP Agentic Top 10, CRI FS AI RMF, and MITRE ATLAS. Accountability risks are treated in Appendix F's hash-chained GTID audit-record sample, Ch. 31's NHI governance patterns, and Ch. 22's Crumpton 5/5 disclosure methodology.
Joseph P. Conroy, Founder and CEO of VectorCertain LLC, said: "The Five Eyes did the hard policy work—establishing that agentic AI risk is a national-security-grade concern across all five member nations. The MYTHOS Playbook is the operational complement: the technical reference a CISO can hand to a security architect, who can then specify enforcement at deployment depth."
The Playbook's detection methodology rests on Clopper-Pearson exact binomial confidence intervals computed across 7,000 MYTHOS adversarial scenarios with 100% recall and a 3-sigma lower bound of ≥99.65% at 99.7% confidence. The patent portfolio underlying the book's architectural commitments includes 55 patents valued between $285M and $1.55B. The book is structured in 7 parts and 9 appendices spanning approximately 450,000 words, including a complete GTID audit-record sample and vendor RFP language.
