I’m Matt Johansen. Every week, I break down the breaches, tools, and AI developments worth your attention. What happened, why it matters, and what we can learn from it.
Free every week. Join 38,000+ readers.
Browse the newsletterThe VulnU community
The newsletter starts the conversation. The community is where we keep it going. Compare notes, share what’s working, and get another perspective from people doing the work.
Explore the membershipFor you, or your team. Explore individual and company memberships.
What to expect inside
Security decisions, tool choices, career moves. Talk through the tradeoffs and learn how others approach the work.
Share workflows for research, detection, and automation. Discuss what helped, what failed, and what still needs a human.
Compare approaches to testing AI applications and agents, managing permissions, and protecting data.
Swap useful code, tools, and reusable agent skills for Codex and Claude Code. Adapt them, try them, and share what you learn.