Developer’s Guide to Building ADK Agents with Skills- Google Developers Blog

This post introduces the ADK SkillToolset, a new capability for AI agents that allows for dynamic loading of domain expertise through progressive disclosure. It details four patterns for implementing skills: inline, file-based, external, and a meta-skill ('skill factory') for self-extending agents. The post explains the L1 (metadata), L2 (instructions), and L3 (resources) knowledge loading architecture, highlighting a 90% reduction in baseline context usage. It provides pseudocode examples for each pattern and emphasizes the universal agentskills.io specification for interoperability across agent frameworks.