This standalone app is built on the AT protocol, powered by Anthropic’s Claude, and was announced at the ATmosphere conference by Jay Graber, who left his position as CEO of Bluesky to build the app. It is currently invitation-only and a waiting list is open.
Bluesky’s most well-known differentiator from X and Threads has always been its custom feed system, the ability to subscribe to streams curated by algorithms built by anyone, not just the platform. TThe problem was that I needed to know how to write code to build these feeds.
Attie, a new standalone app announced at Bluesky’s ATmosphere developer conference this past weekend, is designed to fill that gap perfectly. Attie allows users to create a personalized social feed by describing what they want in plain language, just like they would talk to any other AI assistant.
Examples on the app’s website include prompts such as “Show me electronic music and experimental sounds from people in your network” and “Builders working on agent infrastructure and open protocol design.”
The app converts these descriptions into working feeds that can be used within Bluesky or other applications built on the AT protocol.
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It runs on Anthropic’s Claude under the hood. At launch, Attie will be invite-only and initially available to ATmosphere conference attendees. A public waiting list is open.
This app was built by Jay Graber and a newly formed team called the Exploration team. Graber, who was Bluesky’s co-founder and CEO, stepped down from his operational role a few months ago and returned to building.
Toni Schneider, a partner at True Ventures, one of Bluesky’s backers, has been appointed interim CEO. Graber introduced Attie at ATmosphere along with Bluesky CTO Paul Frazee.
Attie is a standalone product and is not a feature of the Bluesky app. Attie is built on the AT Protocol, an open source decentralized framework that powers Bluesky and a growing ecosystem of other applications collectively known as Atmosphere.
Users sign in using their Atmosphere login. This means your existing Bluesky account will work. Because the AT Protocol is an open data system, Attie can instantly understand the interests and social context of users across the entire ecosystem, not just Bluesky itself.
Attie’s long-term roadmap continues further, with plans to go beyond customizing feeds to allow users to vibecode their own social apps from scratch. Schneider described it as follows “This is the beginning of allowing more people to build on top of the atmosphere.”
Bluesky’s Jay Graber was clear about the philosophy behind the product. In a blog post accompanying the launch, she wrote that major platforms are “not trying to solve” the problem of AI-induced signal degradation on social media. “They use AI to increase the amount of time users spend on their platforms, collect training data, and shape what users see and believe through systems they cannot examine or choose.”
Attie is configured as an AI that does the opposite, allowing users to control their own algorithmic environment rather than removing it. The company, which recently raised $100 million and has more than 43 million users, positions Attie as a dedicated sandbox for agent social experimentation, separate from the main Bluesky app that these users rely on.
