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Self-Evolving Agent Harness

arxiv.org13 points1 comments
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Self-Evolving Agent Harness defines a framework for agents that iteratively rewrite their software scaffolding - prompts, memory, workflows, tools, and executable components - while keeping core model weights fixed. It separates what can be updated (interpreted state, tools/code, repository control, plugin composition) from who proposes and who admits changes, and it implements a feedback-driven pipeline where accepted revisions persist across runs. The design treats search over harness revisions as an evolutionary optimization problem and documents practical cases of harness co-design, distributed execution, and plugin reuse, arguing that reliable deployment depends on continual validation as task distributions, evaluators, privileges, and runtime contexts shift.

The work gives a theoretical treatment of reliability via continual PAC-style learning: under explicit assumptions it derives an expected generalization bound, a retention bound tied to historical regression budgets, and a high-probability admission rule that requires fresh, independent validation data. It highlights organizational and safety consequences of persistent harness changes for knowledge sharing, scientific reproducibility, physical safety, and institutional accountability, and prescribes independent safeguards for learning, runtime privileges, and consequential actions. A comprehensive companion (code and supplements) expands on algorithms, evaluations, and broader impacts to guide practical, auditable deployment of evolving agent harnesses.

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