It looks like there is good support for theline-delimited Json idea, and no-one has spoken against it, so I'm going to switch to that format.
Timestamps will be in ISO 8601 format, inside the event object.
Startup and Shipyard events will include a ship id.
Startup will state current credits balance and loan.
I have a few more days in my schedule to implement some more of the suggestions: expect an updated doc sometime next week.
Great! Thank you for your effort!