Saying, "I grew up reading Carmack’s .plan files for Quake, so it’s fun to be writing one of my own," Sean Murray announces a new patch for No Man's Sky. This is the expected update to pave the way for this week's release of Hello Games' space opera. He also explains the promised server wipes, saying beside today's there will be another tomorrow. The full post contains some spoilers, but this part seems unspoiled:

When we went gold five or six week ago, we posted on twitter, and literally every reply was like “hope you are going on a nice holiday!”. Some of us have, but I didn’t want to, not yet. I pictured myself somewhere staring out the window thinking about this game I’ve been working on for five years.
We’re under a pretty intense spotlight right now, and hopefully it’s easy to imagine how hard it would be to switch off from that, or how deeply we care about people’s first impression of the game.

In fact most of us were back here the day after we went gold, working on this update. We’re already proud of what we put on a disk, but if we had time, why not continue to update it?

Hello Games will continually update No Man’s Sky this way. This is the first of many.

It will be available on Monday for press for review once it exits submission, and on launch for public on PC and PS4. We expect future updates like these to continue to be free.

For 99.9% of people, all you have to do is install the update before you begin to play.
If you had an early copy somehow, your save game will technically work post update, but you will miss out on new content and experiences if you don’t delete your save before updating (should be obvious why from notes below). We highly recommend deleting your save if you have played before updating your game (we won’t do this in future, but it’s a day zero update).

Servers will be wiped on Sunday and again Monday in the lead up to launch.