---
title: "Think wider"
description: "Theo Browne asks developers to cover more product breadth instead of adding depth in one narrow area."
plain: "Theo asks developers to cover more product breadth instead of piling depth into one narrow area."
group: concept
terms:
  - "think wider"
  - "product breadth"
sources:
  - url: https://youtu.be/xUnRQ9vLXxo?t=787
    title: "Everything we knew about software has changed — Theo Browne, @t3dotgg ​ - YouTube"
    publisher: "Theo Browne"
    note: "Breadth argument; used to distinguish range from depth."
    accessed: "2026-10-01"
  - url: https://youtu.be/xUnRQ9vLXxo?t=877
    title: "Everything we knew about software has changed — Theo Browne, @t3dotgg ​ - YouTube"
    publisher: "Theo Browne"
    note: "Extensibility argument; used for user-built vertical features."
    accessed: "2026-10-01"
---

# Think wider

> For agents: start with the [agent guide](https://ratstack.sh/llms.txt). Every page is Markdown by default; add `Accept: text/html` for HTML.

New on /news: [Effect Office Hours 52 with Resonate HQ](/news).

Theo refines "bigger" into "wider" and distinguishes the range a product covers from the feature count in one area. [13:07](https://youtu.be/xUnRQ9vLXxo?t=787) [13:23](https://youtu.be/xUnRQ9vLXxo?t=803).

He says an extensible architecture can let users build features within a product area that the product author did not predict. [14:37](https://youtu.be/xUnRQ9vLXxo?t=877).

See [AI Engineer World's Fair 2026](/lore/aiewf-2026-everything-we-knew-about-software-has-changed-theo-browne) and [Theo Browne](/lore/theo-browne).

## Sources

1. [Everything we knew about software has changed — Theo Browne, @t3dotgg ​ - YouTube](https://youtu.be/xUnRQ9vLXxo?t=787)
   Theo Browne. Breadth argument; used to distinguish range from depth. Accessed 2026-10-01.

2. [Everything we knew about software has changed — Theo Browne, @t3dotgg ​ - YouTube](https://youtu.be/xUnRQ9vLXxo?t=877)
   Theo Browne. Extensibility argument; used for user-built vertical features. Accessed 2026-10-01.

## Linked from

- Agent guide → An Effect stack so pure (aspirational) Kit Langton will blush. → [Read page](https://ratstack.sh/llms.txt)

- Change log → What changed in the files served here, newest first. → [Read page](https://ratstack.sh/log)

- Full agent guide → An Effect stack so pure (aspirational) Kit Langton will blush. → [Read page](https://ratstack.sh/llms-full.txt)

- Purpose and boundaries of rat-stack (VISION.md) → What this starter is for and what a useful copy should keep. → [Read page](https://ratstack.sh/VISION.md)

- Rat Stack lore | rat-stack → Short, source-grounded notes on the ideas and decisions behind rat-stack. → [Read page](https://ratstack.sh/lore)

- Source change history (log.md) → The generated change log as Markdown. → [Read page](https://ratstack.sh/log.md)

- Theo Browne → Theo Browne discusses broader software work and model reliability in public talks. → [Read page](https://ratstack.sh/lore/theo-browne)