From what I understood, the gist of it is that uses a bunch of skills in a loop to help LLMs solve the tasks better via browser-testing, debugging, visual-testing, etc..

The skills can be found here:

https://github.com/ironbee-ai/ironbee-devtools-skills/tree/m...

Question that was left unanswered:

How much longer does a 4x DeepSkeep loop took compared to Opus?