A third standard role for auditors, regulators, and external
read-only viewers. Like project_team it gets project-wide `r`, but
unlike project_team the role itself carries no `c` anywhere — so an
observer can't bring a working/<email>/ home into existence under
auto-own, even though the auto-own mechanism is path-keyed rather
than role-keyed.
Approver-by-design: the role audit explicitly rejects a separate
`approver` role. Plan-Review approval stays with document_controller;
two-person sign-off, when needed, is expressed via per-folder `.zddc`
overrides rather than baked-in roles. Comments in defaults.zddc.yaml
and ARCHITECTURE.md call this out so future role audits don't
reopen the question.
TestStandardRoles_ObserverReadOnlyEverywhere locks the invariants:
project-wide r, no c at archive/incoming/working/staging/reviewing,
WORM zones read-only (no worm-create), and not subtree-admin
anywhere even when notionally elevated.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>