Outside oil and crops, California assets are people, yea? Engineers.

Here:

You get the entire Los Angeles basin. You get most of the Bay Area: the area served by BART, Berkeley, things west of Berkeley, and Marin County. You also get everything in the middle. Generally the border runs along the ridge of the coastal mountains.

The USA keeps San Diego, Eureka, Davis, Fresno, etc.

You get exclusive rights to the "California" name. The USA will split the leftover bits into at least 3 states.

sure. you keep the engineers, we'll add all of the stock owned by Californian's in US companies to the Fed's balance sheet. We'll keep the infrastructure and apply tolls liberally. Obviously National Park/Forrest and even state parks will stay. You can visit for a fee, of course.