Implementation complexity estimator

Derived only from documented signals: a public API, single sign-on, documented integrations. Without any signal there is no level.

Ironclad

Low Estimated Sum of 1 documented signals (Public API: -1); unmeasured signals are left out and never counted as effort.

Public API	true (-1)
Single sign-on	not measured
Documented integrations	no integration documented; absence is not evidence of implementation effort