This article covers the fifth layer of the full-stack architecture: Full-Chain Traceability. This is not a standalone module — it's observability infrastructure embedded into every layer. Core engineering value: turning "something broke, let's guess" into "root cause identified in 5 minutes."
0. The Pain Point
After Part 4's judgment engine went live, the system could produce quantified scores and missing element breakdowns. But a new problem emerged almost immediately:
Companies started pushing back.
"Pages 12–13 of our report explicitly state the environmental incident impact scope. Why was this flagged as non-compliant?"
