Chapter 15 of 23 · Level 7 · Reliability & SafetyReliability & Error HandlingHuman-in-the-loop approval, retries, fallbacks, circuit breakers, and mid-run recovery.This chapter is taught inside another chapter's unit.15Agents You Can Trust Are Built From GuardrailsA demo that works once is not a product. Agent security is the discipline of bounding what an agent can do: guardrails, prompt injection defence, least privilege, and graceful failure.8 min read→