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Sierra blog Nov 14, 2026
Personal Agent Protocol Poppy ships 1.0: every Shopify store now publishes a Poppy file, and Meta's Muse looks for it first
Personal Agent Protocol, or Poppy, has moved from draft to version 1.0, defining how personal agents connect with companies through business agents, websites and APIs while reusing existing standards such as MCP, OpenAPI and UCP, with OAuth letting customers control what an agent may do. Shopify has enabled Poppy for every merchant on its platform, with each store automatically publishing a Poppy file and needing no extra implementation, and Meta's agent Muse now looks for Poppy first on every site it visits. Design partners have grown from the initial group to more than 100, with Mercury, Synchrony and Turkish Airlines already live in specific scenarios.
Personal Agent Protocol, or Poppy, has moved from draft to version 1.0, defining how personal agents connect with companies through business agents, websites and APIs while reusing existing standards such as MCP, OpenAPI and UCP, with OAuth letting customers control what an agent may do. Shopify has enabled Poppy for every merchant on its platform, with each store automatically publishing a Poppy file and needing no extra implementation, and Meta's agent Muse now looks for Poppy first on every site it visits. Design partners have grown from the initial group to more than 100, with Mercury, Synchrony and Turkish Airlines already live in specific scenarios.
Sierra
Personal Agent Protocol AI agent
Sierra blog Nov 6, 2026
Sierra packages the basics of customer-service agents as maintainable Accelerators, keeping company edits through updates
Sierra has released its first Accelerators in Agent Studio, packaging high-volume customer-service workflows such as order tracking, appointment scheduling, first notice of loss and ID verification together with basic integrations and guardrails, which Ghostwriter then customizes to a company's own policies. Unlike one-time templates, Accelerators record a company's changes separately from the underlying workflow, so those changes carry over when Sierra ships an update, and the company reviews the full set of changes before deciding whether to apply them. The official example is a media company adding the retention Accelerator and adapting it to its own cancellation policies and offers, with the agent ready for testing in minutes.
Sierra has released its first Accelerators in Agent Studio, packaging high-volume customer-service workflows such as order tracking, appointment scheduling, first notice of loss and ID verification together with basic integrations and guardrails, which Ghostwriter then customizes to a company's own policies. Unlike one-time templates, Accelerators record a company's changes separately from the underlying workflow, so those changes carry over when Sierra ships an update, and the company reviews the full set of changes before deciding whether to apply them. The official example is a media company adding the retention Accelerator and adapting it to its own cancellation policies and offers, with the agent ready for testing in minutes.
Sierra
Sierra Accelerators Accelerators product release
Sierra blog Oct 7, 2026
Sierra unveils Agent OS models Curie and Fleming at its summit, with the platform handling compliance, voice latency and cost automatically
At its San Francisco summit, Sierra announced two new Agent OS models, Curie and Fleming, alongside Tandem Voice, Persona Studio and Ghostwriter. Curie powers the core orchestration loop of a conversation, deciding which path to follow, which tools to call and what replies customers see; Fleming detects when a caller is another agent, so businesses can handle bots and fraud. Sierra says Agent OS automatically ensures compliance, low-latency voice and a better cost basis, leaving companies to focus on building their own agent.
At its San Francisco summit, Sierra announced two new Agent OS models, Curie and Fleming, alongside Tandem Voice, Persona Studio and Ghostwriter. Curie powers the core orchestration loop of a conversation, deciding which path to follow, which tools to call and what replies customers see; Fleming detects when a caller is another agent, so businesses can handle bots and fraud. Sierra says Agent OS automatically ensures compliance, low-latency voice and a better cost basis, leaving companies to focus on building their own agent.
Sierra
Agent OS Tandem Voice Persona Studio Personal Agent Protocol Horizon

You’re all caught up

Personal Agent Protocol Poppy ships 1.0: every Shopify store now publishes a Poppy file, and Meta's Muse looks for it first

Sierra packages the basics of customer-service agents as maintainable Accelerators, keeping company edits through updates

Sierra unveils Agent OS models Curie and Fleming at its summit, with the platform handling compliance, voice latency and cost automatically