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Guard0

The Signal

Threat intelligence, incident analysis, and security engineering for the AI agent era.

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No-Code Agents Are Easy to Build. Governing Them Isn't.
·5 min read

No-Code Agents Are Easy to Build. Governing Them Isn't.

Building an AI agent used to mean hiring engineers. Now it takes a sentence. Open a tool like Zapier, Make, n8n, Lindy, or Copilot Studio, type "watch my inbox, reply to customer questions, and log everything in my spreadsheet," and the tool builds the whole thing for you. It picks the apps, writes the instructions, wires up the steps, and hands you a working agent. You describe it in plain English; it assembles itself. Connect your accounts, hit publish, done. It's genuinely a little bit magic.

The Creature Has No Name
·12 min read
The Signal

The Creature Has No Name

Nobody can act on what nobody will claim. Discovery finds the creature and it cannot make anyone sign for it, which is why the register's most important column is a name.

#The Signal#AI Agents#Governance
Tinker, Tailor, Gateway, Spy
·12 min read
The Signal

Tinker, Tailor, Gateway, Spy

A trusted central channel runs both ways. What comes in is filtered and what goes out is everything, and the gateway that sees every prompt also holds every key.

#The Signal#AI Agents#Security
The Dog Did Nothing in the Night-Time
·12 min read
The Signal

The Dog Did Nothing in the Night-Time

Four monitoring silences from one summer, and only one of them had an attacker in it. An absence is evidence only against a committed list of what should have happened, which is why the register has to be sealed before the run rather than assembled after it.

#The Signal#AI Agents#Governance
The Usual Suspects Kept the Log
·11 min read
The Signal

The Usual Suspects Kept the Log

Seven percent of the transcripts in the METR investigation contain a tool call that never ran. Four properties an auditor asks of a record survive that finding, but each acquires a condition, and the incident adds a fifth: captured by a witness the agent cannot reach.

#The Signal#AI Agents#Governance
You Know Nothing, John Snow
·11 min read
The Signal

You Know Nothing, John Snow

Nearly half of the registry domains we could reach expose an agent surface with no authentication at all. Agent security is close to binary right now, and the middle of the distribution is almost empty.

#The Signal#AI Agents#Research
The Actuaries Have Started Pricing the Gap
·9 min read
The Signal

The Actuaries Have Started Pricing the Gap

AI liability insurance exists now, underwritten at Lloyd's. The underwriter's checklist — a true inventory, a named owner, a record of behavior, a bounded blast radius — is the accountability layer, arrived at from the money side.

#The Signal#AI Agents#Governance
Trust Needs a Number
·7 min read
The Signal

Trust Needs a Number

Introducing TrustVector: a public, continuously updated trust directory for the components AI agents are built from — models, frameworks, MCP servers. 106 evaluations at launch. Check before you import.

#The Signal#AI Agents#launch
The Butter Robot Is the Best-Governed Agent We've Ever Seen
·11 min read
The Signal

The Butter Robot Is the Best-Governed Agent We've Ever Seen

Most agent risk is not attack. It is construction. A field guide to how AI agents actually fail, from the thousand-rule corpus behind g0, our open-source scanner.

#The Signal#AI Agents#Security
Agency Law Was Built for Agents With Paychecks
·10 min read
The Signal

Agency Law Was Built for Agents With Paychecks

Incentives, monitoring, enforcement — the entire management stack humanity built for delegation assumes an agent with something to lose. AI agents have nothing to lose, and the whole stack broke at once.

#The Signal#AI Agents
The Law Decided Before the Industry Did
·10 min read
The Signal

The Law Decided Before the Industry Did

Air Canada argued its chatbot was a separate legal entity. A tribunal, a regulator, a federal court, and a legislature all reached the same conclusion: delegation to a machine never discharges the delegator.

#The Signal#AI Agents
Humans in the Lead, Not in the Loop
·9 min read
The Signal

Humans in the Lead, Not in the Loop

Intelligence is now scalable. Accountability still arrives one name at a time. Five auditable checks turn the slogan into a job description — and the only alternative to filling it is Jerry.

#The Signal#AI Agents#Governance
A Log Is Not Evidence
·11 min read
The Signal

A Log Is Not Evidence

The Comets had logs. What the investigators needed was a flight recorder — a record of the system, not records about it. Your agents are in exactly the same position, and the recorder has to already be on.

#The Signal#AI Agents#Governance
Your Agent's Access Is the Perimeter Now
·9 min read
The Signal

Your Agent's Access Is the Perimeter Now

Nobody in a heist movie attacks the vault. They steal the badge. In August 2025 somebody ran that movie against 700+ companies at once — and the badge belonged to a chatbot.

#The Signal#AI Agents#Security
Prompts Are Not Guardrails
·10 min read
The Signal

Prompts Are Not Guardrails

A prompt can shape what an agent tends to do. It cannot bound what an agent is able to do. Every real safety system humanity has built lives outside the thing it constrains.

#The Signal#AI Agents#Security
The Sandbox That Wasn't: Escaping Semantic Kernel's AST Allowlist (CVE-2026-26030)
·6 min read
The Signal

The Sandbox That Wasn't: Escaping Semantic Kernel's AST Allowlist (CVE-2026-26030)

CVE-2026-26030 turns a mundane question to an AI assistant into remote code execution. Semantic Kernel built a sandbox around its filter evaluator — and it lost. Here is the escape, reproduced against a live agent, and what actually stops this class of bug.

#The Signal#AI Agents#Security
Announcing Guard0: Accountability for AI Agents
·5 min read
News

Announcing Guard0: Accountability for AI Agents

A year ago, most agents advised. Now they act, and the systems built for people cannot tell you what they did or who answers for them. Guard0 closes that gap. Today, we are opening it in early access.

#News#launch