> For the complete documentation index, see [llms.txt](https://dappos.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dappos.gitbook.io/docs/dappos/xbubble/how-xbubble-works/bubble-engine.md).

# Bubble Engine

Bubble Engine is the solution factory.

For a specified task, Bubble Engine uses AI coding agents to generate solution variants, build test harnesses, combine candidate models and tools, and evaluate outputs against task examples and quality criteria.

The strongest route becomes a Standard Operating Procedure, or SOP: a reusable solution dispatched whenever a similar request appears, after Bubble Engine tests its versatility.