Euthyna's spending limit lives in a smart contract, not a config file. Every time it commits to paying a bill on time, the outcome is settled on-chain — a hit raises its limit, a miss halves it. No self-reported metrics. No trust required, only verification.
On one labeled test vault (short parameters, not an organic business outcome), the contract has graded a hit and a miss. The limit stepped up, then down.
The agent committed 1 USDC to reserve against a bill, paid it on time, and the contract settled the commitment as a hit.
Staged deliberately to prove the other half: the agent's wallet committed reserve over a bill that nobody then paid. The contract halved the score and froze sweeps for 24 hours.