Fresh Eyes

A long session accumulates anchoring. Each hypothesis feels sound because it was built on the last one. A subagent with no context inherits none of that.

The one rule

Give it the evidence, not your conclusion.

"I concluded X, check X" recruits agreement. "Here are six observations, what do you make of them" produces an independent read. If it lands where you did without being told, that is corroboration. If it was handed your chain, it is an echo.

Two modes

Corroborate — for a diagnosis

Use when a conclusion is about to block or justify real work.