ADR-C-005 from the ADR-conformance pass.
Status Proposed -> Accepted. Two apps have shipped against this ADR and its
structural rulings run in CI at severity: error with 0 violations; the other
five ADRs are all Accepted. A decision CI enforces is not "Proposed".
Drops two "out of scope, not built" bullets that have since shipped
(WP-61..67) — the Behandeling backoffice, and the backend status lifecycle +
authz DTOs: AanvraagStatusTag, GET /me (Program.cs:578), Domain/
Authorization/Authz.cs. Real authentication is the one that genuinely stays.
Replaces the `Session -> Principal` deferral with a Known debt section. The
deferral was conditional on the backoffice not existing yet; it does now, and
the union did not follow. `grep -rn "Principal" apps libs` returns one hit,
a comment. Consequently the two auth contexts are byte-identical (diff -rq:
zero content differences), and behandelportal's Behandelaar still carries a
bsn and logs in through DigiD — a backoffice user authenticating as a
citizen, which is what §3 was written to prevent. The divergence that did
happen took an orthogonal side door (medewerker.interceptor.ts) that never
touches Session.
The section says explicitly that the WP-67 amendment's "expected to diverge"
reasoning still holds but has never been tested, so the identical copies are
evidence §3 is unexecuted — not evidence §3 was wrong. Without that, a future
reader is likely to "simplify" the duplication away and cement the citizen
login into the backoffice.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
ehoandClaude Opus 5
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