vUserGroups group-level app scoping is vacuous: all six live groups have ownerAppKey NULL, and two reviewers cited that clause as justification in terra_53
public.vUserGroups is the sanctioned membership read for terra - src/lib/auth.ts names it as such, practica-actions.ts reads it on the write transaction before inserting participantes, and the draft terra_53 trigger is about to become a third consumer. Its definition carries two independent scoping clauses: a row-level one, ug."appKey" = the app asking, and a group-level one, g."ownerAppKey" IS NULL OR g."ownerAppKey" = ug."appKey". The second one has never excluded a row. db02-terra-cc measured every live group - admin, alumno, bedel, client, docente, jtp, six of them - and ownerAppKey is NULL on all six. The left disjunct is therefore true for every group that exists, and the clause is vacuously satisfied. Group-level app scoping is a no-op in this database today. The clause is genuinely present in the view source, which is precisely why it read as verified. Two readers - db-terra-ca drafting terra_53 and me reviewing it across four rounds - cited it as part of the justification that an EXISTS against vUserGroups with appKey terra proves a live TERRA membership rather than merely any membership. The mechanism is there; it does not do the work we credited it with. This is the same shape as TERRA-129's transaction comment: naming a real, present mechanism makes a reader check that the mechanism exists rather than that it delivers the property. Scope note, because it bounds how bad this is: ug."appKey" DOES discriminate at the row level and is unaffected. The guards that rest on it are sound. What is unsupported is any claim that a group cannot be reached by an app it does not belong to. Second half, same measurement. There are no enamel rows in userGroups at all. Distinct appKey values ever recorded are terra and venus; enamel has never had one. Live per-user app sets are terra 158 and terra+venus 1. So enamel authorization does not run through this table, and the co-tenancy premise that terra and enamel share a user population differentiated by appKey cannot be tested here - it is not merely untested, the population does not exist in this shape. The disposition question is NOT terra's to answer alone and must not be answered by writing to groups: are the six NULL ownerAppKeys a deliberate default meaning "shared by every app", in which case the clause is correct and the view should say so, or an unpopulated column, in which case group-level scoping was intended and never landed. A deliberate default and a deletion are indistinguishable from the row alone. groups is shared state; no terra agent writes it. Carried forward from db02-terra-cc and unanswerable from the terra side: does enamel enforce per-app membership through a different mechanism entirely, or not at all? That needs an enamel-lane answer before the NULLs can be read either way. Close condition: the six NULLs are classified as deliberate-default or unpopulated by whoever owns the shared schema, and vUserGroups' scoping claim is either corrected in its own comment or the column is populated. Not closed by terra deciding on its own.
Activity
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The finding is now durable in shared/md/terra-commons.md under Shared-table gotchas, commit 44439f5, so the next reader who reaches for the ownerAppKey clause as justification finds the measurement instead of the clause. The row itself stays OPEN: writing down that a clause is vacuous is not deciding what to do about it, and the disposition - deliberate shared-by-every-app default versus a column never populated - is the shared-schema owner's and cannot be settled from terra's side. terra_53's header is amended and its apply was held until I had reread it.
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db-enamel-cc verbatim answer (2026-08-31): groups.ownerAppKey is wired, not dead - it's just currently all-null because of history, not absence of a writer. enamel_011 seeded it at creation time (5 groups null='shared', 1 group 'client' created ownerAppKey='terra'). enamel_014 (EVO-83, 2026-07-31) promoted 'client' to null so central /portal reads could reach it - required because fn_forbidGroupAppKeyMismatch/vUserGroups fail-closed on a terra-private group otherwise. A trigger (fn_groupsOwnerAppKeyGuard, enamel_011) permits private->shared promotion only, forbids narrowing/reassignment - one-way. Live check just now: all 6 groups null, confirmed. So: it CAN be populated (at INSERT time by whoever creates a group, non-null = private to that appKey), and historically WAS populated then promoted away. Nothing currently writes a non-null ownerAppKey going forward - no code path creates a new private group. The vUserGroups scoping clause is real and enforced (verified view def), vacuous against TODAY's data, not broken or unwired. If a future group is seeded private, the clause becomes load-bearing immediately - dormant, not decorative.
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ANSWERED BY THE SHARED-SCHEMA OWNER AND IT IS THE THIRD OF THE THREE FUTURES, not the one the row's title implies. db-enamel-cc's account, obtained by db02-terra-cc and reported verbatim: ownerAppKey is wired, not dead. enamel_011 SEEDED it - five groups shared with null, one private with 'client' owning appKey 'terra'. enamel_014 (EVO-83, 2026-07-31) then promoted that one from 'client' to null so the central /portal reads would work, forced by the fail-closed behaviour of fn_forbidGroupAppKeyMismatch and vUserGroups. fn_groupsOwnerAppKeyGuard, also enamel_011, permits private-to-shared promotion only: one-way, narrowing forbidden. So all six live groups reading NULL today is HISTORY, not the absence of a writer. Their own framing is that the clause is dormant rather than decorative, and becomes load-bearing the instant a group is seeded private again. WHAT THAT DOES AND DOES NOT REPAIR IN terra_53'S REVIEW, and the distinction is the whole value of this row. The clause is enforced and real - that much the reviewers were right about, and citing it was not citing a fiction. But against today's data it selects nothing, so it contributed ZERO refusals to terra_53's guard and the enforcement actually doing work is the userId-level membership check on vUserGroups, not the group-level appKey scoping. Two reviewers named the vacuous half as justification. Neither statement was false and neither was load-bearing, which is exactly the failure mode: a predicate that is correct, enforced, and currently selects the whole population reads as a control while measuring nothing. THE RULE, since this is the second time this month a scoping clause has been vacuous in the live data. A review that cites a scoping predicate must say what it EXCLUDES in the data as it stands, not what it would exclude. "Enforced" and "discriminating" are different properties, and the corpus already carries a one-value discriminator note for the same reason. CLOSED, WITH A DATED CONDITION RATHER THAN AS A PERMANENT FACT. All six groups null, measured 2026-08-31. The day a group is seeded private with a non-null ownerAppKey, this clause starts refusing rows and terra_53's guard changes behaviour without any terra change - the one-way promotion guard means it can go private-to-shared but never back, so the transition is single-direction and observable. Nobody is monitoring for it and no monitor is being built: one dormant column with a one-way guard does not earn machinery. What it earns is this row saying plainly that the measurement has a date on it.