[HALTED] BrainTrust Investment Lab

One source per sheet; every step CERTIFIED or OWED by BrainTrust Staff, matched against the book’s page.

steps certified

9 of 9

step per_attribute · a type PER ATTRIBUTE, not per table ✓ CERTIFIED · p.464

step housekeeping · the five columns, applied ✓ CERTIFIED · p.466

step timestamp_source · the as-of date, never a drifting provider stamp ✓ CERTIFIED · p.466

step aggregate_notify · the type 1/3 side effect ✓ CERTIFIED · p.465

step type1_propagation · the overwrite reaches back -- but never into bronze ✓ CERTIFIED · p.465

step worksheet · the SS9 walk worksheet exists ✓ CERTIFIED · p.[house] station standard

step measured · the SCD, measured on real rows ✓ CERTIFIED · p.[house]

step tables · the target's tables measured ✓ CERTIFIED · p.[house]

step step9 · step9 ✓ CERTIFIED

dim_security — the SS9 walk