Defense in Depth / Complexity
Kind: tension
Record: tension:complexity-defense-in-depth
Canonical: Schema
"defense-in-depth" (security-core layer) is traded against "Complexity" (human-factors layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Complexity" and choosing an explicit operating point.
Listed in Tensions, after Security by Design / Developer Ergonomics and before Least Privilege / Operational Convenience.