Paper: SkillOpt: Executive Strategy for Self-Evolving Agent Skills
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Problem
Creating effective skills for large language model (LLM) agents has been challenging. Current methods – whether hand-crafting, generating them once, or using loosely controlled self-revision – don’t consistently improve agent performance over time and lack the focused optimization seen in deep learning weight updates. Essentially, existing approaches haven’t treated agent skills as something that can be systematically trained for optimal results.
Method
The SkillOpt paper proposes a novel approach to tackle this problem. It treats an agent’s skill (which is typically textual) as an external state separate from the LLM itself – think of it like optimizing the instructions given to the LLM, rather than changing the LLM’s internal parameters. This “skill” document undergoes edits (additions, deletions, or replacements) made by a dedicated optimizer model. These edits are proposed based on how well previous “rollouts” (runs of the agent using the skill) performed. Critically, an edit is only accepted if it strictly improves performance on a held-out validation set. To ensure stability during training, SkillOpt incorporates techniques like a textual learning rate budget and a buffer to store rejected edits. This all happens without adding any extra computational overhead at deployment time.







