sec_cik — the SS2 walk
The SEC's own identity register — 49,270 rows binding company names to CIK numbers. Identity is where financial data goes wrong first, so the resolver the star joins on is measured like a first-class source, not treated as a lookup.
One source per sheet; every step CERTIFIED or OWED by BrainTrust Staff, matched against the book’s page.
steps certified
5 of 5
step strategy · the CDC mode is DECLARED by LOOKUP, enum-gated against the six signed modes ✓ CERTIFIED · p.451-452
step audit_columns · audit columns tested, not trusted ✓ CERTIFIED · p.452
step deletes · deletion visibility MEASURED by the mode's own instrument ✓ CERTIFIED · p.452
step reason_codes · corrections distinguished from true updates -- candidates ENUMERATED, every one… ✓ CERTIFIED · p.451
step level_closure · the level closes only when every step below it passed, by its own program, at… ✓ CERTIFIED · p.[house] WALK_ORDER_LAW s0a axiom 5 + s0a.7 (owner ruling 2026-08-29)