Witness

Witness hashes and timestamps every git commit onchain in real time, through a lightweight post-commit hook. If your machine crashes mid-build, your work history survives as an immutable, independently verifiable record for you, and for anyone checking that your submission is real. Built during this exact hackathon, after my own laptop died mid-build. Contract has no access control, so anyone can run the same setup on their own project and get their own checkpoint history, filtered to their own wallet.