phase=architecture_lane_billing
family=billing
status=complete
type=architecture_audit_and_freeze
production_baseline=66a3b921dc24c73cc3de2c0ea1ae5b0bf44b0e2e
orders_freeze_baseline=5469e489b6573bf39463fcc77304c1681d9e60eb
historical_catalog_ungate=be8fdc5474c283d6fc7868ac0508ccf7a08c3d59
depends_on=orders_freeze,11H4,catalog_04
do_not_reopen=11D8,11E,11F,11G,11H,phase_10_kernel,core_workspace_billing,payment-checkout-create_write_path
new_phase_number_invented=no

# ---------------------------------------------------------------------------
# 1. Surfaces classified
# ---------------------------------------------------------------------------
surface.app_block.billing.invoice=canonical
surface.feature_pack.billing-management=canonical
surface.entity.invoice_record=canonical
surface.primitive.data.entity=canonical
surface.starter.record.table=canonical
surface.core.invoices=Core-only
surface.core.stripe_customer=Core-only
surface.core.stripe_subscription=Core-only
surface.pack.saas-membership=different_capability
surface.alias.payments.subscription=compatibility
surface.pack.payment-checkout=different_capability
surface.alias.payments.checkout=compatibility
surface.connector.stripe.create_invoice=provider_specific
surface.entity.app_subscription=different_capability
surface.forms.quote_request=different_capability
surface.accounting.ledger=not_admitted
surface.tax.engine=not_admitted
surface.public_invoice_payment=not_admitted

# ---------------------------------------------------------------------------
# 2. Critical audit answers
# ---------------------------------------------------------------------------
canonical_billing_subject=staff-managed invoice record
core_workspace_billing_is_application_billing=no
reuse_core_invoices_table=no
reuse_stripe_invoice_connector=no
reuse_saas-membership=no
reuse_payment-checkout=no
reuse_order_record=no
pricing_engine_required=no
tax_engine_required=no
accounting_engine_required=no
subscription_engine_required=no
checkout_required=no
generated_app_billing_depends_on_core_stripe=no
paid_means_stripe_charge=no
paid_is_invoice_status=yes
invoice_may_exist_without_order=yes
orders_required_to_install_billing=no
billing_required_to_install_orders=no

# ---------------------------------------------------------------------------
# 3. Minimal ontology
# ---------------------------------------------------------------------------
canonical_product_ontology=invoice_record fields: reference, customer_name, customer_email, notes, amount, currency, due_date, status(draft|issued|paid|void)
ownership=staff_managed
rls_enabled=no
owner_managed=no
workflow=no
events=generic data.entity / record events
starter_contracts=record.table,record.detail,record.create,record.edit,state.empty
generated_bff=staff /api/records via adapter.records
forbidden_generated=private /api/billing, stripe client, checkout session, Core invoices.read, journal entries

# ---------------------------------------------------------------------------
# 4. Boundaries
# ---------------------------------------------------------------------------
provider_boundary=P2HS invoice_record != Stripe Invoice != Core invoices table != PaymentIntent
orders_boundary=order_record answers what was ordered; invoice_record answers billed amount and billing state
catalog_boundary=Catalog + Billing held; no catalog_item to invoice inference
checkout_boundary=payments.checkout remains pack-only
subscription_boundary=payments.subscription / saas-membership remains pack-only Core-adjacent membership
accounting_boundary=not admitted

# ---------------------------------------------------------------------------
# 5. Composition
# ---------------------------------------------------------------------------
billing_crm_composition=candidate_independent_records
billing_case_composition=candidate_independent_records
billing_documents_composition=candidate_independent_records
billing_files_composition=candidate_independent_records
billing_orders_composition=pass
billing_catalog_composition=held
billing_booking_composition=candidate_no_automatic_invoice
billing_core_workspace=prohibited
billing_checkout=not_admitted
billing_inventory=not_implied

# ---------------------------------------------------------------------------
# 6. Freeze checklist
# ---------------------------------------------------------------------------
billing_admitted=yes
canonical_capability=billing.invoice
canonical_app_block=billing.invoice
canonical_feature_pack=billing-management
canonical_entity=invoice_record
canonical_store=Cloud records via data.entity
canonical_execution=generated adapter.records + staff /api/records
billing_without_stripe=yes
billing_without_checkout=yes
billing_without_subscriptions=yes
billing_without_accounting=yes
billing_without_orders=yes
orders_composition_proven=yes
catalog_composition_proven=held
generated_app_composition_proven=yes
installation_proven=yes
runtime_crud_proven=yes
core_workspace_billing_boundary=pass
core_stripe_dependency=none
new_kernel_primitive=no
new_general_cloud_store=no
new_acl_model=no
new_ownership_model=no
new_workflow_engine=no
phase_10_kernel_changed=no
checkout_write_path_changed=no
architecture_exceptions_required=0
private_backend_substitutes=0
open_p0=0
open_p1=0
family_frozen=yes
ready_for_fast_lane_composition=yes
on_disk_billing_recipes=none
next_architecture_family=inventory