ResearchResearch paperLarge Language Models · Robotics & Embodied AI · Agents & Tool Use1 source · Oct 17, 2026

Where Natural Language Ends in Agents: Executable Skill Composition with MetaSkill

Agent Skills express open-ended task knowledge in natural language, but composing them requires persistent execution order and upstream-output handoffs.

Key points

  • We propose selective formalization at Skill boundaries: coordination relations with stable references and machine-checkable constraints become executable, while substantive task judgments remain within Skills.
  • We introduce MetaSkill, a hybrid representation that preserves complete Skill packages and local instructions while making invocation dependencies and predecessor-text bindings executable through a directed acyclic graph (DAG) runtime.
  • Across 20 multi-Skill artifact tasks and two LLMs, we compare natural-language procedures, prompt-visible graphs, and MetaSkill derived from a common frozen plan per task, using the same designated Skill packages.
  • Together, these findings support MetaSkill as a practical interface for composing open-ended Skills, combining local linguistic flexibility with executable dependencies, explicit predecessor-text bindings, and auditable coordination.

Sources (1)

  • [1]Where Natural Language Ends in Agents: Executable Skill Composition with MetaSkill
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 17, 02:34 PM
    Agent Skills express open-ended task knowledge in natural language, but composing them requires persistent execution order and upstream-output handoffs.
    We propose selective formalization at Skill boundaries: coordination relations with stable references and machine-checkable constraints become executable, while substantive task judgments remain within Skills.

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