Web Without Walls — Dan Abramov | React Universe Conf 2024

Summary of “Web Without Walls — Dan Abramov | React Universe Conf 2024”

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Key Technological Concepts and Product Features

1. Blue Sky and the AT Protocol

• Blue Sky is a social media app similar to Twitter but built on a new Internet protocol called the AT protocol (also referred to as the “ad protocol” in the talk).
• The Blue Sky frontend and backend are open source, developed with Expo and React Native, enabling rapid multi-platform development.
• Usernames in Blue Sky are domain-based (e.g., username@domain.social), linking identity to internet domains. This adds trust and authenticity (e.g., accounts like washingtonpost.com are verifiably owned by The Washington Post).
• Users can swap their domain-based username to their own domain if they own one.
• Blue Sky allows users to write and plug in their own algorithms for content feeds, enabling customized social experiences beyond built-in algorithmic feeds (e.g., a “quiet posters” feed).

2. The AT Protocol (Atmosphere)

• A decentralized, user-controlled data layer built on top of traditional social products.
• Users own their data in repositories that hold JSON collections; these repositories are hosted on servers operated by users or companies.
• Data is cryptographically signed by users, ensuring authenticity and tamper-resistance.
• Domains act as human-readable aliases for identities, but actual data can be hosted anywhere.
• The protocol supports linking between JSON records, allowing complex data relationships similar to how web pages link.
• Supports mutable social data: posts, likes, events can be created, updated, or deleted.

3. Data Ownership and Portability

• Unlike traditional social networks (e.g., Facebook, Twitter) where users are “inside the box,” Blue Sky and the AT protocol put users “outside the box” with control over their data.
• Data can persist independently of any single product or company.
• Users can run their own servers or use third-party hosting, preventing vendor lock-in.
• If a product dies, user data still exists and can be used by new or resurrected products.

4. Architecture and Scalability

• The protocol uses a network relay node that aggregates and caches data from millions of user repositories.
• This relay node distributes events to all consumers, allowing multiple independent backends to consume and filter data relevant to their app.
• Running a relay node is relatively inexpensive (around $150/month at current scale).
• Apps built on this protocol operate with a traditional client-server model but with a user-controlled backend layer feeding data into the servers.

5. Interoperability and Ecosystem

• Multiple apps can build on the AT protocol, each defining their own JSON schemas (e.g., Blue Sky posts, Smoke Signal events).
• Apps can reactively update based on changes in user data across the network without needing centralized APIs.
• Enables building plugins, bootstrapping new apps using existing social graphs, and blurring boundaries between apps.
• Example: A meetup-like app called Smoke Signal built on the AT protocol, integrated with Blue Sky identities and events.
• Potential for apps to display content from other apps (e.g., Instagram showing posts from Threads-like apps).

6. Developer and Community Resources

• Blue Sky and the AT protocol are open source with tutorials and documentation available at at.com and community resources at protocol.dev.
• Early apps and demos exist, including a Hacker News clone and a meetup-style app built on the protocol.
• The community is small but growing, with tech talks and active GitHub discussions.

7. Philosophical and Practical Implications

• The talk emphasizes user control over data and the web as a permissionless, mutable, and interconnected space.
• Critiques current social media models where users are locked into centralized platforms.
• The AT protocol aims to restore the web’s original spirit by enabling social interaction without walls — hence the title “Web Without Walls.”
• The approach is experimental but already in production with Blue Sky.
• Even if Blue Sky or the company dies, the protocol and data remain, enabling others to continue or resurrect the ecosystem.

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Guides, Tutorials, and Reviews Mentioned

• Blue Sky App: Open source frontend and backend built with Expo and React Native.
• AT Protocol Tutorial: Available on at.com, showing how to build apps on the protocol.
• Community Site: protocol.dev, hosting tech talks and community discussions.
• Example Apps:
  • Smoke Signal (meetup-like app on AT protocol)
  • Hacker News clone
• GitHub Discussions: For deeper technical questions and community support.

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Main Speaker

• Dan Abramov — Software engineer at Blue Sky, speaker at React Universe Conf 2024.

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Overall, the talk presents a novel decentralized social media architecture that empowers users with control over their data, enables interoperability across apps, and envisions a future web without centralized walls or silos.