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On October 27, 2026, Prateek Khushalani published the HappyDelivery multi-agent conversational commerce prototype on the Google Developers Blog. The prototype is built on LangGraph, Gemini, FastAPI, and Google Cloud, implementing the previously proposed three-layer decoupled architecture of Ingress, Memory, and Cognition. The prototype abstracts channels such as WhatsApp, RCS, Apple Messages for Business, and SMS through platform-specific signature verification and a unified message schema; the Ingress layer was measured returning HTTP 200 in approximately 295–302 ms and forwarding to Pub/Sub. The article also provides code examples for the state machine, deterministic financial tools, and an automated validation suite. There are currently no subsequent developments.
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Google builds a multi-agent conversational commerce prototype on GCP with LangGraph and Gemini…Developments
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Google Developers Blog publishes HappyDelivery multi-agent prototype
Source:Google Developers Blog
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Oct 27
Google Developers BlogFirst-party
Google builds a multi-agent conversational commerce prototype on GCP with LangGraph and Gemini…
The Google Developers Blog showcased HappyDelivery, a multi-agent conversational commerce prototype built on LangGraph, Gemini, FastAPI, and Google Cloud, which implements the previously proposed three-layer decoupled architecture of Ingress, Memory, and Cognition. The prototype abstracts channels such as WhatsApp, RCS, Apple Messages for Business, and SMS using platform-specific signature verification and a unified message schema; in testing, the Ingress layer returned HTTP 200 in approximately 295–302ms and forwarded requests to Pub/Sub. The article also provides code examples for the state machine, deterministic financial tools, and an automated validation suite.