SkillJuror: Measuring How Agent Skill Organization Changes Runtime Behavior

• URL: http://arxiv.org/abs/2606.11543v1
• Date: Wed, 10 Jun 2026 01:11:50 GMT
• Title: SkillJuror: Measuring How Agent Skill Organization Changes Runtime Behavior
• Abstract summary: Current benchmarks rarely distinguish what a Skill says from how it is organized.<n>We study this distinction through Progressive Disclosure, where a concise root file points agents to supporting resources on demand.<n>We present SkillJuror, a framework for evaluating Skill writing paradigms.
• Score: 23.11308948097101
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Agent Skills augment large language model (LLM) agents with procedural knowledge at inference time, but current benchmarks rarely distinguish what a Skill says from how it is organized. We study this distinction through Progressive Disclosure, where a concise root file points agents to supporting resources on demand, and compare it with a normalized flat baseline. We present SkillJuror, a framework for evaluating Skill writing paradigms through semantically controlled variants, matched multi-trial evaluations, and trajectory evidence while holding task knowledge fixed. In an 82-task SkillsBench study, Progressive Disclosure changes runtime behavior before aggregate outcomes: distinct Skill resources touched per trajectory rise from 1.18 to 3.85, and effective uptake events rise from 1.33 to 3.92. It also yields 17 additional verifier-passing trials out of 410 matched trials (+4.1%) over the normalized flat baseline. The benefit is task-dependent. Progressive Disclosure helps when supporting resources guide implementation, checking, or repair, but is weaker when success hinges on exact output conventions, numerical thresholds, or long artifact-generation pipelines. These results show that Skill organization is not mere presentation: it can change how agents search and apply procedural knowledge, while outcome gains depend on whether the exposed resources are actionable for the task. Code is available at https://github.com/zhiyuchen-ai/skill-juror.

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