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Task T3.5: smoke-tenant.mjs — two dev tokens (org_A/org_B); tenant B reading A's meeting → 403 (KG-02), B's list excludes A's, A reads its own → 200. Slice-3 verification: 114 tests green, pnpm -r build all packages, boundary clean, tenant smoke + capability smoke + all prior smokes (realtime/inbox/support/adapter/route/ ai/calendar) pass. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>