الباحثون

Daren Zha

المنشورات 7

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ROUTEAUDIT: Interaction-Aware Identification for Budgeted Multi-Verifier Routing

Miaobo Hu, Shuhao Hu, Xiaobo Guo وآخرون · 2026

Adaptive multi-verifier systems are commonly compared through endpoint quality-cost gaps, even when the verifier catalog, availability, accounting, information filtration, or scorer changes with the policy. We formulate verifier routing as a contract-conditioned identification problem. The contract records request supp …

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FSPO: Policy-Consistent Risk and Pareto-Feasible Control for Budgeted LLM RL Post-Training

Miaobo Hu, Shuhao Hu, Xiaobo Guo وآخرون · 2026

Adaptive LLM reinforcement-learning post-training changes multiple training actuators online, including rollout temperature, group size, clipping, KL regularization, verifier allocation, and update budget. Three coupled issues remain unresolved. A future-risk model trained from behavior trajectories need not estimate t …

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FAER: Auditable Utility-Aligned Trajectory Replay for Language Model Post-Training

Miaobo Hu, Shuhao Hu, Xiaobo Guo وآخرون · 2026

Replay selectors often rank cached trajectories by format feedback, confidence, freshness, or response length, although cache-level correctness and downstream learner utility are distinct objectives. We formalize this selection-to-learning gap and introduce FAER as an auditable full-trajectory replay framework. Its tra …

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VStress: Correlation-Aware Auditing and Adaptive Budget Allocation for Repeated Verifiers

Miaobo Hu, Shuhao Hu, Xiaobo Guo وآخرون · 2026

Repeated verifier calls are useful only when they contribute conditional information. We introduce VStress, an auditable replay contract, and VStress-CA, a correlation-aware allocation policy that estimates the conditional marginal information of an unqueried verifier on a sealed calibration split, discounts uncertaint …

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Actions with Receipts: Jointly Binding Claims, Evidence, and Execution for Replayable Tool-Agent Auditing

Miaobo Hu, Shuhao Hu, Xiaobo Guo وآخرون · 2026

Tool-using agents can expose citations and execution logs while leaving a critical association unaudited: whether the claim shown to a user is the claim emitted by the committed execution and supported by the cited source. A valid citation and a valid trace can therefore remain individually well formed while being tran …

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ContractRL: Shielded Group-Relative Policy Optimization for Auditable Tool-Call Repair

Miaobo Hu, Shuhao Hu, Xiaobo Guo وآخرون · 2026

Structured tool calls often fail after only a small number of fields violate a schema or an execution contract. Regenerating the complete object enlarges the action surface and makes repeated repair difficult to audit. We introduce ContractRL, a contract-constrained sequential repair protocol that models verifier-guide …

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