The Problem
When the model does everything, it costs more and shows less.
It's tempting to push everything through the model: checking access, maintaining state, enforcing rules. But that's the work it's worst at. Each task burns tokens, drifts in accuracy, and leaves no trace of what happened. The harness is where that work belongs and where the reliability of every agentic system comes from.
The model does work code should. Rules, permissions, and formatting run as expensive, error-prone generation instead of plain code.
Behavior is a black box. Without harness-level logging, you can't see what context an agent has or why it answered as it did.
Nothing closes the loop. Outcomes aren't captured, so the system never learns from what worked and what didn't.
Dataplane Approach
From a do-everything prompt to a workflow you can trust.
Define hooks and gates
Wrap the model in permission checks, validation gates, and hooks that enforce your rules as code, not hope.
permissions · gates · validateInject context
Pull the exact data and state each step needs into context, instead of making the model fetch and remember it.
retrieve · state · serveClose the loop
Log every call, then route outcomes and feedback back to refine tools, context, and the ontology.
observe · feedback · refineOutcomes
Where You Feel It
A real harness makes agents cheaper to run and far easier to trust.
Gates and validation catch errors the model would otherwise wave through.
Predictable work runs as code, so you stop paying the model to do it.
Offloading lookups and checks keeps the model's job small and fast.
Logged outcomes show what's failing, so every run feeds the next fix.