Measuring Where Intent Gets Lost in Agentic Smart Contract Synthesis

Authors: Abhinav Goel , Agostino Capponi , Alfio Gliozzo , Chaitya Shah

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Abstract: AI agents can now write software from a plain-English description, but code that runs is not the same as code that does what was asked. This gap matters most for smart contracts, the programs behind Web3 applications that move money on a blockchain and cannot be fixed once deployed. We ask how to check whether an AI-written contract behaves as it should, and where the requested behavior gets lost.

We design an evaluation built on execution rather than opinion. We replay the same transactions on an AI-written contract and on the original it should reproduce and measure how often they agree. We test every grading tool on planted mistakes, compare against an answer key written without the description, and audit our own scorer until known wrong answers cannot pass. Common methods, such as AI judges and standard analysis tools, miss obvious mistakes, and scoring choices matter too. Checking only the functions every system includes hid about half the difference between pipelines.

We then propose an elicitation-first architecture. Before writing code, the agent asks the client a short checklist of questions, checks the contract against an independently written executable answer key, and returns disagreements to the client instead of silently rewriting code. Asking first matters far more than reviewing or patching afterwards, across three AI models, while automated security fixes often break requested behavior. A few well-chosen questions recover much of what a short description omits, and their value can be estimated without the original contract. To our knowledge, this is the first study in smart contract synthesis to gather missing requirements before generation and check the result against an independently written executable model. The lessons extend to any setting where AI agents turn requests into programs. We release our tools, 600 tasks and all results.

Comments:

ACM TheWebConf2027 8 pages main content 4 pages appendix

Subjects:

Artificial Intelligence (cs.AI) ; Human-Computer Interaction (cs.HC); Information Retrieval (cs.IR); Multiagent Systems (cs.MA); Software Engineering (cs.SE)

Cite as:

arXiv:2610.37830 [cs.AI]

(or

arXiv:2610.37830v1 [cs.AI] for this version)

https://doi.org/10.48550/arXiv.2610.37830

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arXiv-issued DOI via DataCite

Submission history

From: Abhinav Goel [ view email ]

[v1]

Tue, 27 Oct 2026 18:43:14 UTC (248 KB)

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