The four stories to have ready

A post, demo or repo that actually reached developers on X or Hacker News.

Proves: curiosity and bias to ship. You made something nobody asked for and it reached developers.

You held a take, the data or the source proved you wrong and you updated in the open.

Proves: truth-seeking over ego.

You argued a position against pushback and it held up or you lost cleanly to a better one.

Proves: you bring spirited debate and can lose cleanly.

A wrong command in a doc or a demo that didn't reproduce, and you caught and fixed it.

Proves: taste and a real documentation-correctness bar.