Google Cloud Next '26 Deep-Dive: Why "Harness Engineering" is the New Prompt Engineering

Google Cloud Next ’26 put the spotlight on agentic software development, where developers increasingly manage AI agents instead of writing every line themselves.

The event emphasized new tooling ideas like harness engineering, online evals, and shift-left/shift-down security for building and deploying agentic systems.

Google also pushed standards and skills for governing fleets of agents, including broader adoption of the Model Context Protocol and agent communication protocols.

Partners and products such as Replit, LangChain, Wiz, Gemini CLI, and Cloud Run illustrated how the ecosystem is adapting to this new workflow.