Key point
One reviewer rule
Your repo should answer three questions fast: what does it do, how do I run it, and what risks did you think about.
A recruiter or mentor may open it between meetings. Make the first screen useful.
What to include
A credible Solidity repo is not only a contract file. It shows structure, proof, and judgement.
For this track, your public repo needs a Solidity 0.8.x contract, tests, deployment instructions, and a short security notes section. It should also show local test results and a testnet deployment address or a deployment script.