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Jia-Peng Li

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#artificial intelligence Preprint Sep 2026

Where Does Exactly-Once Live? Model, Harness, and Tool-Contract Effects on Duplicate Side Effects in LLM Agents

When a tool-using agent's write times out or returns a server error, the action may already have taken effect. Retrying blindly duplicates it -- a second charge, a second announcement, a second deployment -- while giving up skips required work. We ask where exactly-once behaviour should be enforced: in the model, in th...

Jia-Peng Li · 0 citations
#machine learning Preprint Sep 2026

Counterfactual Tool Ranking under Utility, Cost, and Privilege Constraints

Counterfactual tool evaluation must distinguish authority, historical support, and what a comparison actually estimates. We study these distinctions with eleven executable enterprise-inspired tools, exact-propensity logs, and real local Model Context Protocol transport. An initial 45-run synthetic study is retained, th...

Jia-Peng Li · 3 citations

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