Sierra Releases Poppy 1.0 With Shopify and Meta Muse Support

What happened

Sierra released Personal Agent Protocol 1.0, known as Poppy, on November 13, 2026, with automatic support for every Shopify store and enablement across Meta’s Muse agent.

Its changes allow staged adoption, refine the use of existing standards, expand company guidance and agent feedback, and introduce extensions so industries can add capabilities without changing the core protocol. Any company can implement the protocol independently, making it available when Muse visits its site.

Sierra said 60 additional companies are joining as design partners, bringing the total to more than 100. Poppy defines how a personal agent acting for one user discovers a company and works through its APIs, website or company agent.

Poppy separates agent identification and permissions from commerce so Shopify's existing checkout flow stays intact. Security rules treat company content as data and keep tokens (the small pieces of text a model reads and writes) and private keys out of model context.

The release follows five weeks of design partners testing drafts against real websites, APIs and agents. Muse now automatically looks for Poppy first on every site it visits.

The new design partners include Cisco, Delta Air Lines, Intuit, Salesforce, Twilio and Zoom. How Poppy Structures Access The draft specification requires a company to publish a poppy.json document at its domain’s /.well-known/poppy.json path over HTTPS.