Free Lesson
Build an Agent Harness in 30 Minutes
30 min
Aug 3, 2026 9:00 AM
Virtual (Zoom)
In this video
What you'll learn
Identify the five parts of an agent harness
Map each part to a failure you have already hit, so you know which layer is actually breaking.
Wrap an unreliable model call in real controls
Add retry, validation and state to a bare call and watch the failure rate drop live.
Decide what belongs in the harness, not the prompt
Use a simple rule to stop patching system behaviour with longer and longer instructions
Why this topic matters
Everyone is still tuning prompts. The teams shipping agents that survive real users havemoved on to the system around the model: workflow control, context, permissions,evaluation and persistent state. That system is the harness, and it is now the thing thatseparates a demo from production. If your agent works in testing and falls over on realinputs, the harness is what you are missing.

