Observability

The Measurement Instrument
A Session Is Not a Stateless Function
The Smallest Useful Model Call
A Resolved Promise Is Not a Correct Answer
Building Systems That Distrust Their Models
From Experiment to Production
Building an Embedding Runtime
Advanced Agents From First Principles 23: Your Infrastructure Is Healthy. Why Is the Agent Getting Worse? Detect Behavioral Drift and Roll Back Safely
Advanced Agents From First Principles 13: How Do You Debug an Agent That Made the Wrong Decision? Add Trajectory Observability
Advanced Agents From First Principles 25: Can You Reproduce an Agent Run Months Later? Add Deterministic Replay and Provenance
Advanced Agents From First Principles 26: Why Did the Agent Fail? Build an Incident Forensics Pipeline
Advanced Agents From First Principles 27: How Reliable Does an Agent Need to Be? Define SLOs and Error Budgets