Automation without spaghetti: color-coding your Zapier graph

Green paths are idempotent: rerunning them should never double-charge or duplicate rows.

Yellow paths include human approvals; we always attach a Slack thread template so context does not evaporate.

Red paths touch money or PII—they require a second mentor review and a printed rollback recipe.

Students export their final graph with the legend baked into the PNG for portfolio reviewers.