A field guide to reliable agents 01 / interactive explainer
The layer around the model

Agent Harness,
explained.

An LLM can reason and generate text. A harness turns that raw capability into a bounded system that can act, be observed, and earn trust.

Run the concept

Watch one request move through the harness

Ready when you are0 / 6 stages

Inside the harness

Select a stage to inspect its handoff.

trace is live
Summarise the current product policyuser goal → harness input
1

Context builder

grounding

The harness turns the user goal into grounded input by assembling the right documents, data and history. It decides what the model is allowed to see.

ReceivesUser goal + available sources
Passes onA compact, cited context pack
Every handoff should be explicit: what came in, what changed, and what is now trusted.
Accepted resultbounded + checked before it reaches the user
The shared layers

The model is only one part of the system.

Two layers watch every stage. One is the memory of what happened. The other is the boundary around what may happen.