Agent Harnesses and Long-Horizon Evaluation
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Prime Agent: How a Self-Improving RLM Harness Keeps Long-Run State Outside the Model
Advanced Agent runtime, safety, and evaluationA deep read of Prime Agent (arXiv 2608.23552 v1): its L0–L3 state hierarchy, persistent REPL, recursive subagents, and Continual Harness—alongside author-reported evaluations, a specification exploit retained through refinement, and the unsandboxed execution boundary.
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