Skill Drift Is Contract Violation: Proactive Maintenance for LLM Agent Skill Libraries
LLM agents increasingly rely on reusable skill libraries, but these skills silently decay as the external services, packages, APIs, and configurations they reference evolve. Existing monitors detect such changes at the wrong granularity: they observe values, not the role those values play in a skill. A version string in a comment is noise; the same string in a pinned dependency is an operational obligation. We formulate skill drift as contract violation and introduce \sgname{}, which extracts executable environment contracts from skill documents and validates only those role-bearing assumptions against known or live conditions. This distinction turns noisy monitoring into a precision-firs...
| Authors | Linfeng Fan, Yuan Tian, Ziwei Li et al. |
|---|---|
| Primary category | cs.SE |
| Published | 9 May 2026 |
| Last updated at source | 9 May 2026 |
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