Question as presented: "D-137 ruling 5 of 5 -- identity fold-in ... the matrix
has a principal column, which would make the conflation machine-detectable.
Fold it in, or keep it separate?" Operator selection, exact: "Fold in as a
D-137 invariant (Recommended)".

D-137 gains the invariant ONE IDENTITY SERVES ONE PRINCIPAL TYPE, enforced by
the matrix principal column: a credential serving both human and service is a
FAIL, not an observation. The SEC-020 conflation becomes machine-detectable and
needs no separate D-number -- the question SEC-020 left proposable-but-unassigned
is absorbed here. First run is expected RED by design: admin serves a human GUI
row and a service API row simultaneously, which is the defect.

ALL FIVE SUB-RULINGS RULED -> Status flips to ADOPTED 2026-07-26. Each was its
own operator exchange, committed and pushed before the next was asked (GA-R5).
Also fixes the Status LINE to lead with ADOPTED so ledger-scan attributes it
correctly (it keys on the last **Status:** line, and the entry was still being
counted as an open decision); scan now shows 4 open decisions. Ledger machine
block re-seeded, POST-CLOSE ADDENDUM added per the 07-18/07-21 precedent.

Implementation is UNBLOCKED but NOT STARTED.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf