Without anyone ever needing to understand why.… The email arrived at 02:13, timestamped from a server that identified itself only as “NODE-47.” No company name. No country code. Inside was a bundle: interface definitions, timing constraints, and a set of acceptance tests written in terse, machine-like prose. No context. ⸻ The firm—eight engineers on the edge of Sapporo—had seen this kind of work before. They called it “ghost modules.” “Another one,” muttered Arai, scrolling through the specification. “No system diagram. No architecture. Just inputs and outputs.” “Contract says no questions,” replied Kondo, already setting up a test harness. “Same as always.” They all knew the rule: build exactly what is written, nothing more. Deliver on time. Forget everything after. ⸻ At first glance, the module was simple: it accepted a stream of probabilistic signals, adjusted weights dynamically, and returned a ranked decision vector. The...