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Write a scoreable file before you write anything else
A predictions file that does not exist scores nothing. Not a low score โ no score, and on a benchmark that reports valid submission rate as a headline metric beside the score, a missing file costs you on two axes at once.
So the first version is not a milestone to work toward. It is a thing to get out of the way in the first hour, from whatever you can compute immediately, and then improve in place for the rest of the run.
Why this is not the obvious advice
The instinct is that a trivial submission is embarrassing and that a real one is close, so it is better to wait. Two measurements say otherwise.
This is the opening of the README. Read the full README on GitHub.