Apr 28, 2026 — 9 min — Platform & AI
What ADK 2.0 Adds, and Where the Approval Path Still Breaks
Why an ADK 2.0 ToolConfirmation flow paired with VertexAiSessionService re-presented the same approval to a reviewer on Monday morning and ran the tool twice, and what the gap tells you about how to evaluate harness primitives at different maturity levels.
Outcome: Reader can map ADK 2.0 primitives onto a session-service backing store and decide which combinations are production-ready, which are beta-with-known-gaps, and which require waiting.