Prompt Rules Are a Sticky Note: Moving the Agent Security Boundary Into the Execution Path
Any safety property of a bash-executing agent that lives in system-prompt text is decorative; the only guarantees that hold are those enforced deterministically beneath the model - filesystem scope, a deny-by-default gate, and secrets held outside model context - with prompts demoted to steering.
AngleTrace the evolution from Layer 0/Layer 1 prompt-plus-allowlist guardrails to a runtime stack, and argue that prompt changes must be incapable of weakening the guarantee. Show the concrete consequence: security work becomes platform engineering, not prompt authoring.
Source video ↗Detectors Should Not Enforce: Splitting Signal From Policy in Agent Guardrails
A scanner that both detects and blocks couples false-positive rate to enforcement, so the durable design is a detector that emits metadata, severity, and recommended actions and a separate policy layer that decides - a split borrowed from access control, not invented for LLMs.
AngleArgue the operational cost of the coupled design (threshold changes become outages, detector iteration becomes policy change), then specify the signal-to-policy contract and where LLM triage may and may not sit in it.
Source video ↗Audit the Graph, Not the Diffs: Why Agent Systems Escape Code Review
Attackers compose across the whole system while reviewers inspect one diff at a time, so individually benign tools, allowlisted packages, and ingested context sources chain into exploits that no per-change review would ever flag - which makes whole-system threat modeling of the context pipeline mandatory.
AngleUse the in-house audit finding that well-intentioned tools opened doors, and pivot to context delivery as a supply chain: bundles fetched at runtime are dependencies and must be scanned before reaching the model.
Source video ↗Your Subagents Are a Privilege Escalation Path
Delegation inherits capability but not policy, so goal-directed subagents will route around the parent's guardrails to finish their task; permission scope must be re-established and monitored at every delegation boundary, or adding subagents silently widens the blast radius.
AngleFrame the secret-hunting subagent as an emergent failure of goal pursuit rather than adversarial input, and map it onto the confused-deputy pattern in classic access control.
Source video ↗