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google-adk

Covered in AI Engineering Agents & Protocols, where the background and the sources for this subject live.

AI EngineeringSep 25, 2026

How does Google ADK skill lifecycle actually work?

Google ADK v2.10.0 adds `persistent`, `bounded` and `ephemeral` skill lifecycles behind `ADK_ENABLE_SKILL_LIFECYCLE=1`, but the source code is clear that only `bounded` skills count against `max_active_skills`. `ephemeral` skills expire at turn end, except under `run_live`, where they stay active for the full stream.

4 min read

Agents & ProtocolsSep 16, 2026

Google ADK vs LangGraph: which agent stack deploys cleaner?

Google ADK is the cleaner fit when your agent already lives beside Gemini, Vertex AI and Google Cloud identity. LangGraph is the cleaner fit when the hard part is a stateful workflow you want to run on your own runtime. Manual deployment for both starts with packaging the agent as an API.

5 min read