AI Engineer World’s Fair 2026: Software has changed

Theo says developers can miss new model capabilities when they keep prompting for the same narrow tasks. 02:35 02:58¶

He separates breadth from depth: products can cover more ground while leaving users room to build missing features within a product area. 13:07 13:23 14:37¶

Sources

  1. Everything we knew about software has changed — Theo Browne, @t3dotgg ​ - YouTube. Theo Browne. Recording; used for wider software work and user-extensible products. Accessed 2026-10-01.

Last changed 2026-10-07 in e73c9d9. Source on GitHub. Change log.

Linked from

  1. Agent guide. An Effect stack so pure (aspirational) Kit Langton will blush.

    AI Engineer World’s Fair 2026: Software has changed — Theo Browne argues that stronger models call for wider software work and extensible products.

  2. Change log. What changed in the files served here, newest first.

    AI Engineer World’s Fair 2026: Software has changed — edited: feat(learn): teach the next twenty cards with plain lines, diagrams and snippets

  3. Cloud as a library. Sam Goodwin argues that cloud services can be consumed as libraries inside an application.

    Sources: Sam Goodwin on Alchemy and AI Engineer World’s Fair 2026.¶

  4. Full agent guide. An Effect stack so pure (aspirational) Kit Langton will blush.
  5. Rat Stack lore | rat-stack. Short, source-grounded notes on the ideas and decisions behind rat-stack.

    AI Engineer World’s Fair 2026: Software has changed — Theo Browne argues that stronger models call for wider software work and extensible products.

  6. Source change history (log.md). The generated change log as Markdown.

    AI Engineer World’s Fair 2026: Software has changed — edited: feat(learn): teach the next twenty cards with plain lines, diagrams and snippets

  7. Think wider. Theo Browne asks developers to cover more product breadth instead of adding depth in one narrow area.

    See AI Engineer World’s Fair 2026 and Theo Browne.¶