Guard the Option-B owner-materializer against overlay-form drift: match inbox
deposits to owned events on the CANONICAL base repo id (canonicalEventId strips any
✌️<overlay> suffix), applied at the matching boundary in materializeAttendance /
readRegistrationNotifications and to dedup ownedEventIds (ownedKey). The count is
still WRITTEN on the real owned NURI — a stripped id is never a write/anchor target.
Honest framing: this is DEFENSIVE, not a fix for an active bug. On the current tree
create-time, listMyEntityDocs and the read @id already carry the identical NURI
(readUnion pins the subject to the input NURI, 63ecfee) — verified: the count
converges for an event owned via listMyEntityDocs. A prior investigation's 'never
matches' reading was the seeded-but-not-owned artifact (a prior-run identity owned
the seed → reached via discovery, not ownedEventIds — correct behavior).
Un-@wip the @data convergence scenario (asserts the just-joined uid enters the
owner-derived active set — deterministic despite shared-inbox accumulation); it
now passes. Fix authParticipationCount already landed separately. Doctrine:
knowledge_context-internals (canonical id-form invariant). Build + tsc clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Sylvain Duchesne
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