feat: add durable store conformance harness

docs/contracts.md

@@ -231,6 +231,21 @@ adapter or provider concerns outside the domain service.
 
 ## Migration Contract
 
-The isolated store exposes `SCHEMA_VERSION = 0001_initial` and a `migrate`
+`user_engine.migrations` exposes the ordered durable-store manifest,
-hook. Database-backed stores must expose equivalent readiness semantics before
+`LATEST_SCHEMA_VERSION`, logical record types, and adapter-neutral diagnostic
-they are accepted by platform adapters.
+count keys. The isolated store's `SCHEMA_VERSION` is derived from that manifest
+and its `migrate` hook must be idempotent. Database-backed stores must expose
+equivalent readiness semantics before they are accepted by platform adapters.
+
+Provider-backed Postgres adapters can use
+`migrations/postgres/0001_user_engine_store.sql` as the bootstrap contract or
+translate it into their own migration framework while preserving schema-version
+tracking, logical record uniqueness, audit durability, and pending-outbox
+reads.
+
+Future adapters should run
+`user_engine.testing.assert_user_engine_store_conformance(testcase, factory)`
+with a factory that returns a fresh store. The harness covers readiness,
+idempotent migration, core save/read/query behavior, transaction rollback,
+outbox ordering, and diagnostics that expose counts without raw factor or
+profile values.

docs/development.md

@@ -13,6 +13,7 @@ src/user_engine/
   adapters/    local standalone adapters and deterministic test doubles
   domain/      transport- and persistence-neutral domain schemas
   errors.py    typed service exceptions for callers and future transports
+  migrations.py ordered durable-store migration manifest
   ports.py     adapter protocols for identity, authorization, events, audit,
                membership export, application bindings, and secrets
   service.py   headless service API for the isolated MVP
@@ -50,8 +51,11 @@ The initial headless API is `UserEngineService`. It exposes health,
 readiness, `me`, user/account lifecycle, identity linking, application
 registration, catalog publication, profile writes, effective profile
 resolution, projections, audit inspection, and outbox inspection. The first
-store is `InMemoryUserEngineStore`, which carries an explicit schema version
+store is `InMemoryUserEngineStore`, which carries a schema version from
-and migration hook so later database-backed stores have a contract to match.
+`user_engine.migrations` and a migration hook so later database-backed stores
+have a contract to match. Future store adapters should run
+`user_engine.testing.assert_user_engine_store_conformance` with their own
+factory before being wired into service tests.
 
 ## Tenant Surface
 

docs/postgres-durable-store-consumer-requirements.md

@@ -282,10 +282,16 @@ The first consumer-side follow-up is complete: `UserEngineStore` defines the
 adapter boundary and the in-memory store acts as the reference implementation
 for service-level behavior.
 
+USER-WP-0016 adds the next consumer-side slice: `user_engine.migrations`
+declares the ordered migration manifest and latest schema version,
+`migrations/postgres/0001_user_engine_store.sql` defines a provider-facing
+bootstrap schema, and `user_engine.testing.store_conformance` exposes a
+reusable harness that future adapters can run with their own store factory.
+The standard local suite runs that harness against `InMemoryUserEngineStore`.
+
 Likely future follow-up work should be:
 
 - Add a Postgres adapter behind the existing store boundary.
-- Add migration files for user-engine tables.
 - Add provider-backed conformance tests for locking, uniqueness races,
   migration readiness, outbox claiming, redacted diagnostics, and restore
   validation.

migrations/postgres/0001_user_engine_store.sql

@@ -0,0 +1,78 @@
+-- USER-WP-0016 durable-store bootstrap for provider-backed Postgres adapters.
+-- Provider repositories may apply this file directly or translate it into
+-- their migration framework while preserving the table semantics.
+
+CREATE TABLE IF NOT EXISTS user_engine_schema_versions (
+    version text PRIMARY KEY,
+    name text NOT NULL,
+    applied_at timestamptz NOT NULL DEFAULT now(),
+    checksum text
+);
+
+CREATE TABLE IF NOT EXISTS user_engine_records (
+    record_type text NOT NULL,
+    record_key text NOT NULL,
+    tenant text,
+    user_id text,
+    application_id text,
+    scope_type text,
+    scope_id text,
+    payload jsonb NOT NULL,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    PRIMARY KEY (record_type, record_key)
+);
+
+CREATE INDEX IF NOT EXISTS user_engine_records_tenant_idx
+    ON user_engine_records (tenant, record_type);
+
+CREATE INDEX IF NOT EXISTS user_engine_records_user_idx
+    ON user_engine_records (user_id, record_type);
+
+CREATE INDEX IF NOT EXISTS user_engine_records_application_idx
+    ON user_engine_records (application_id, record_type);
+
+CREATE INDEX IF NOT EXISTS user_engine_records_scope_idx
+    ON user_engine_records (scope_type, scope_id, record_type);
+
+CREATE TABLE IF NOT EXISTS user_engine_audit_records (
+    audit_id text PRIMARY KEY,
+    tenant text NOT NULL,
+    actor_issuer text NOT NULL,
+    actor_subject text NOT NULL,
+    action text NOT NULL,
+    subject text NOT NULL,
+    correlation_id text NOT NULL,
+    summary text,
+    payload jsonb NOT NULL,
+    recorded_at timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS user_engine_audit_records_tenant_idx
+    ON user_engine_audit_records (tenant, recorded_at);
+
+CREATE INDEX IF NOT EXISTS user_engine_audit_records_subject_idx
+    ON user_engine_audit_records (subject, recorded_at);
+
+CREATE TABLE IF NOT EXISTS user_engine_outbox_events (
+    event_id text PRIMARY KEY,
+    tenant text NOT NULL,
+    event_type text NOT NULL,
+    aggregate_id text NOT NULL,
+    correlation_id text NOT NULL,
+    payload jsonb NOT NULL,
+    occurred_at timestamptz NOT NULL DEFAULT now(),
+    claimed_at timestamptz,
+    claimed_by text,
+    delivered_at timestamptz,
+    failed_at timestamptz,
+    failure_reason text
+);
+
+CREATE INDEX IF NOT EXISTS user_engine_outbox_events_pending_idx
+    ON user_engine_outbox_events (occurred_at)
+    WHERE claimed_at IS NULL AND delivered_at IS NULL;
+
+INSERT INTO user_engine_schema_versions (version, name)
+VALUES ('0001_initial', 'initial durable store')
+ON CONFLICT (version) DO NOTHING;

src/user_engine/adapters/local.py

@@ -32,8 +32,9 @@ from user_engine.domain import (
     User,
     WelcomeProtocol,
 )
+from user_engine.migrations import LATEST_SCHEMA_VERSION
 
-SCHEMA_VERSION = "0001_initial"
+SCHEMA_VERSION = LATEST_SCHEMA_VERSION
 
 
 @dataclass
@@ -332,6 +333,7 @@ class InMemoryUserEngineStore:
             "tenant_accounts": len(self.tenant_accounts),
             "memberships": len(self.memberships),
             "applications": len(self.applications),
+            "bindings": len(self.bindings),
             "catalogs": len(self.catalogs),
             "family_invitations": len(self.family_invitations),
             "registration_sessions": len(self.registration_sessions),

src/user_engine/migrations.py

@@ -0,0 +1,124 @@
+"""Migration manifest for durable user-engine store adapters."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import PurePosixPath
+
+
+@dataclass(frozen=True)
+class MigrationStep:
+    """One ordered durable-store migration known to user-engine."""
+
+    version: str
+    name: str
+    description: str
+    record_types: tuple[str, ...]
+    sql_path: str | None = None
+
+
+USER_ENGINE_STORE_RECORD_TYPES = (
+    "users",
+    "accounts",
+    "external_identities",
+    "tenant_accounts",
+    "memberships",
+    "applications",
+    "application_bindings",
+    "catalogs",
+    "family_invitations",
+    "registration_sessions",
+    "identity_factors",
+    "prepared_accounts",
+    "access_profiles",
+    "active_access_contexts",
+    "welcome_protocols",
+    "onboarding_journeys",
+    "profile_values",
+    "audit_records",
+    "outbox_events",
+)
+
+USER_ENGINE_RECORD_COUNT_KEYS = (
+    "users",
+    "accounts",
+    "tenant_accounts",
+    "memberships",
+    "applications",
+    "bindings",
+    "catalogs",
+    "family_invitations",
+    "registration_sessions",
+    "identity_factors",
+    "prepared_accounts",
+    "access_profiles",
+    "active_access_contexts",
+    "welcome_protocols",
+    "onboarding_journeys",
+    "profile_values",
+    "audit_records",
+    "pending_outbox_events",
+)
+
+USER_ENGINE_MIGRATIONS = (
+    MigrationStep(
+        version="0001_initial",
+        name="initial durable store",
+        description=(
+            "Create the schema-version ledger, logical record table, audit "
+            "log table, and pending outbox table used by user-engine store "
+            "adapters."
+        ),
+        record_types=USER_ENGINE_STORE_RECORD_TYPES,
+        sql_path="migrations/postgres/0001_user_engine_store.sql",
+    ),
+)
+
+LATEST_SCHEMA_VERSION = USER_ENGINE_MIGRATIONS[-1].version
+
+
+def migration_manifest() -> tuple[MigrationStep, ...]:
+    """Return the ordered durable-store migration manifest."""
+    return USER_ENGINE_MIGRATIONS
+
+
+def validate_migration_manifest(
+    migrations: tuple[MigrationStep, ...] = USER_ENGINE_MIGRATIONS,
+) -> tuple[str, ...]:
+    """Return manifest validation errors without touching provider resources."""
+    errors: list[str] = []
+    if not migrations:
+        return ("migration manifest must not be empty",)
+
+    seen_versions: set[str] = set()
+    previous_version = ""
+    for migration in migrations:
+        if not migration.version:
+            errors.append("migration version must not be empty")
+        if migration.version in seen_versions:
+            errors.append(f"duplicate migration version {migration.version}")
+        if previous_version and migration.version <= previous_version:
+            errors.append(
+                f"migration {migration.version} must sort after {previous_version}"
+            )
+        if not migration.name:
+            errors.append(f"migration {migration.version} must have a name")
+        if not migration.record_types:
+            errors.append(
+                f"migration {migration.version} must declare logical record types"
+            )
+        if len(set(migration.record_types)) != len(migration.record_types):
+            errors.append(f"migration {migration.version} has duplicate record types")
+        if migration.sql_path is not None:
+            path = PurePosixPath(migration.sql_path)
+            if path.is_absolute() or ".." in path.parts:
+                errors.append(
+                    f"migration {migration.version} sql_path must stay repo-relative"
+                )
+            if path.suffix != ".sql":
+                errors.append(
+                    f"migration {migration.version} sql_path must reference SQL"
+                )
+        seen_versions.add(migration.version)
+        previous_version = migration.version
+    return tuple(errors)

src/user_engine/testing/__init__.py

@@ -1 +1,11 @@
 """Testing helpers and local fixtures for user-engine."""
+
+from user_engine.testing.store_conformance import (
+    assert_user_engine_migration_contract,
+    assert_user_engine_store_conformance,
+)
+
+__all__ = [
+    "assert_user_engine_migration_contract",
+    "assert_user_engine_store_conformance",
+]

src/user_engine/testing/store_conformance.py

@@ -0,0 +1,522 @@
+"""Reusable conformance checks for user-engine store adapters."""
+
+from __future__ import annotations
+
+from collections.abc import Callable
+from typing import Any
+from unittest import TestCase
+
+from user_engine.domain import (
+    Account,
+    AccountStatus,
+    AccessMembershipRequirement,
+    AccessProfile,
+    AccessScopeType,
+    ActiveAccessContext,
+    Actor,
+    Application,
+    ApplicationBinding,
+    AttributeDefinition,
+    AuditRecord,
+    Catalog,
+    CatalogLifecycle,
+    ExternalIdentity,
+    FamilyInvitation,
+    IdentityFactor,
+    IdentityFactorType,
+    InvitationStatus,
+    Membership,
+    Mutability,
+    OnboardingJourney,
+    OnboardingStep,
+    OnboardingTriggerType,
+    OutboxEvent,
+    PreparedAccount,
+    PreparedEntitlement,
+    PreparedEntitlementKind,
+    PreparedFactorRequirement,
+    PrincipalType,
+    ProfileScope,
+    ProfileValue,
+    ProjectionType,
+    RegistrationSession,
+    RegistrationStatus,
+    Sensitivity,
+    TenantAccount,
+    User,
+    Visibility,
+    WelcomeProtocol,
+    WelcomeProtocolStep,
+)
+from user_engine.migrations import (
+    LATEST_SCHEMA_VERSION,
+    USER_ENGINE_RECORD_COUNT_KEYS,
+    migration_manifest,
+    validate_migration_manifest,
+)
+from user_engine.ports import UserEngineStore
+
+StoreFactory = Callable[[], UserEngineStore]
+
+TENANT = "tenant:store-conformance"
+USER_ID = "usr_store_conformance"
+RAW_FACTOR_VALUE = "store.user@example.test"
+PROFILE_SECRET_VALUE = "quiet-secret-profile-value"
+
+
+def assert_user_engine_migration_contract(testcase: TestCase) -> None:
+    """Assert the migration manifest is ordered and provider-safe."""
+    testcase.assertEqual(validate_migration_manifest(), ())
+    manifest = migration_manifest()
+    testcase.assertGreaterEqual(len(manifest), 1)
+    testcase.assertEqual(manifest[-1].version, LATEST_SCHEMA_VERSION)
+    testcase.assertEqual(
+        manifest[0].sql_path,
+        "migrations/postgres/0001_user_engine_store.sql",
+    )
+
+
+def assert_user_engine_store_conformance(
+    testcase: TestCase,
+    store_factory: StoreFactory,
+) -> None:
+    """Run the core durable-store behavior contract for one store factory."""
+    assert_user_engine_migration_contract(testcase)
+    _assert_readiness_contract(testcase, store_factory)
+    _assert_save_read_and_query_contract(testcase, store_factory)
+    _assert_transaction_rollback_contract(testcase, store_factory)
+    _assert_outbox_ordering_contract(testcase, store_factory)
+    _assert_diagnostics_contract(testcase, store_factory)
+
+
+def _assert_readiness_contract(testcase: TestCase, store_factory: StoreFactory) -> None:
+    store = store_factory()
+    if store.schema_version is None:
+        testcase.assertFalse(store.ready)
+
+    store.migrate()
+
+    testcase.assertTrue(store.ready)
+    testcase.assertEqual(store.schema_version, LATEST_SCHEMA_VERSION)
+    store.migrate()
+    testcase.assertTrue(store.ready)
+    testcase.assertEqual(store.schema_version, LATEST_SCHEMA_VERSION)
+
+
+def _assert_save_read_and_query_contract(
+    testcase: TestCase,
+    store_factory: StoreFactory,
+) -> None:
+    store = _migrated(store_factory)
+    records = _write_reference_records(store)
+    user = records["user"]
+    account = records["account"]
+    identity = records["identity"]
+    tenant_account = records["tenant_account"]
+    membership = records["membership"]
+    application = records["application"]
+    binding = records["binding"]
+    catalog = records["catalog"]
+    invitation = records["invitation"]
+    registration = records["registration"]
+    factor = records["factor"]
+    prepared_account = records["prepared_account"]
+    access_profile = records["access_profile"]
+    access_context = records["access_context"]
+    welcome_protocol = records["welcome_protocol"]
+    onboarding_journey = records["onboarding_journey"]
+    profile_value = records["profile_value"]
+
+    testcase.assertEqual(store.user(USER_ID), user)
+    testcase.assertEqual(store.user_account(USER_ID), account)
+    testcase.assertEqual(store.find_identity(identity.issuer, identity.subject), identity)
+    testcase.assertEqual(store.identities_for_user(USER_ID), (identity,))
+    testcase.assertEqual(store.tenant_account(TENANT, USER_ID), tenant_account)
+    testcase.assertEqual(store.memberships_for_user(USER_ID), (membership,))
+    testcase.assertEqual(store.memberships_for_user(USER_ID, tenant=TENANT), (membership,))
+    testcase.assertEqual(store.memberships_for_tenant(TENANT), (membership,))
+    testcase.assertEqual(store.application(application.application_id), application)
+    testcase.assertEqual(store.binding(binding.application_id), binding)
+    testcase.assertEqual(store.catalog(catalog.catalog_id), catalog)
+    testcase.assertEqual(store.all_catalogs(), (catalog,))
+    testcase.assertEqual(store.family_invitation(invitation.invitation_id), invitation)
+    testcase.assertEqual(store.family_invitations_for_user(USER_ID), (invitation,))
+    testcase.assertEqual(store.registration_session(registration.registration_id), registration)
+    testcase.assertEqual(store.all_registration_sessions(), (registration,))
+    testcase.assertEqual(store.identity_factor(factor.factor_id), factor)
+    testcase.assertEqual(store.factors_for_registration(registration.registration_id), (factor,))
+    testcase.assertEqual(store.factors_for_user(USER_ID), (factor,))
+    testcase.assertEqual(
+        store.prepared_account(prepared_account.prepared_account_id),
+        prepared_account,
+    )
+    testcase.assertEqual(store.prepared_accounts_for_tenant(TENANT), (prepared_account,))
+    testcase.assertEqual(store.access_profile(access_profile.access_profile_id), access_profile)
+    testcase.assertEqual(store.access_profiles_for_tenant(TENANT), (access_profile,))
+    testcase.assertEqual(store.active_access_context(USER_ID, TENANT), access_context)
+    testcase.assertEqual(store.active_access_contexts_for_tenant(TENANT), (access_context,))
+    testcase.assertEqual(store.welcome_protocol(welcome_protocol.protocol_id), welcome_protocol)
+    testcase.assertEqual(store.welcome_protocols_for_tenant(TENANT), (welcome_protocol,))
+    testcase.assertEqual(
+        store.onboarding_journey(onboarding_journey.journey_id),
+        onboarding_journey,
+    )
+    testcase.assertEqual(store.onboarding_journeys_for_user(USER_ID), (onboarding_journey,))
+    testcase.assertEqual(
+        store.onboarding_journeys_for_user(USER_ID, tenant=TENANT),
+        (onboarding_journey,),
+    )
+    testcase.assertEqual(store.onboarding_journeys_for_tenant(TENANT), (onboarding_journey,))
+    testcase.assertEqual(store.values_for_user(USER_ID), (profile_value,))
+
+    replacement = User(
+        user_id=USER_ID,
+        display_name="Replacement User",
+        primary_email=RAW_FACTOR_VALUE,
+        created_at=user.created_at,
+    )
+    store.save_user(replacement)
+    testcase.assertEqual(store.user(USER_ID), replacement)
+
+
+def _assert_transaction_rollback_contract(
+    testcase: TestCase,
+    store_factory: StoreFactory,
+) -> None:
+    store = _migrated(store_factory)
+    actor = _actor()
+
+    with testcase.assertRaises(RuntimeError):
+        with store.transaction():
+            store.save_user(User(user_id="usr_rollback", display_name="Rollback"))
+            store.append_audit(
+                AuditRecord(
+                    audit_id="aud_rollback",
+                    actor=actor,
+                    action="store.write",
+                    subject="usr_rollback",
+                    tenant=TENANT,
+                    correlation_id="corr-rollback",
+                    summary="rolled back audit",
+                )
+            )
+            store.append_outbox(
+                OutboxEvent(
+                    event_id="evt_rollback",
+                    event_type="store.rollback",
+                    aggregate_id="usr_rollback",
+                    payload={"result": "rollback"},
+                    tenant=TENANT,
+                    correlation_id="corr-rollback",
+                )
+            )
+            raise RuntimeError("force rollback")
+
+    testcase.assertIsNone(store.user("usr_rollback"))
+    testcase.assertEqual(store.audit_log(), ())
+    testcase.assertEqual(store.pending_outbox(), ())
+
+
+def _assert_outbox_ordering_contract(
+    testcase: TestCase,
+    store_factory: StoreFactory,
+) -> None:
+    store = _migrated(store_factory)
+    events = (
+        OutboxEvent(
+            event_id="evt_order_1",
+            event_type="store.first",
+            aggregate_id=USER_ID,
+            payload={"sequence": 1},
+            tenant=TENANT,
+            correlation_id="corr-order",
+        ),
+        OutboxEvent(
+            event_id="evt_order_2",
+            event_type="store.second",
+            aggregate_id=USER_ID,
+            payload={"sequence": 2},
+            tenant=TENANT,
+            correlation_id="corr-order",
+        ),
+    )
+    for event in events:
+        store.append_outbox(event)
+
+    testcase.assertEqual(store.pending_outbox(), events)
+
+
+def _assert_diagnostics_contract(
+    testcase: TestCase,
+    store_factory: StoreFactory,
+) -> None:
+    store = _migrated(store_factory)
+    _write_reference_records(store)
+
+    counts = dict(store.record_counts())
+    testcase.assertEqual(set(counts), set(USER_ENGINE_RECORD_COUNT_KEYS))
+    testcase.assertTrue(all(isinstance(value, int) for value in counts.values()))
+    testcase.assertEqual(counts["bindings"], 1)
+    testcase.assertEqual(counts["pending_outbox_events"], 1)
+
+    diagnostics_text = repr(counts)
+    testcase.assertNotIn(RAW_FACTOR_VALUE, diagnostics_text)
+    testcase.assertNotIn(PROFILE_SECRET_VALUE, diagnostics_text)
+
+
+def _migrated(store_factory: StoreFactory) -> UserEngineStore:
+    store = store_factory()
+    store.migrate()
+    return store
+
+
+def _write_reference_records(store: UserEngineStore) -> dict[str, Any]:
+    actor = _actor()
+    user = User(
+        user_id=USER_ID,
+        display_name="Store Conformance User",
+        primary_email=RAW_FACTOR_VALUE,
+    )
+    account = Account(
+        account_id="acct_store_conformance",
+        user_id=USER_ID,
+        status=AccountStatus.ACTIVE,
+    )
+    identity = ExternalIdentity(
+        identity_id="eid_store_conformance",
+        user_id=USER_ID,
+        issuer="https://issuer.example.test",
+        subject="store-conformance",
+        provider="fixture",
+    )
+    tenant_account = TenantAccount(user_id=USER_ID, tenant=TENANT)
+    membership = Membership(
+        membership_id="mbr_store_conformance",
+        user_id=USER_ID,
+        tenant=TENANT,
+        scope_type="team",
+        scope_id="team:store-conformance",
+        kind="member",
+    )
+    application = Application(
+        application_id="app.store-conformance",
+        display_name="Store Conformance",
+        owner="team:store-conformance",
+        allowed_profile_scopes=(ProfileScope.GLOBAL, ProfileScope.APPLICATION),
+        allowed_projection_types=(ProjectionType.APPLICATION_RUNTIME,),
+    )
+    binding = ApplicationBinding(
+        application_id=application.application_id,
+        oidc_client_id="store-conformance-client",
+        protected_system_id="store-conformance.service",
+        catalog_namespaces=("store",),
+        event_source="store-conformance",
+        deployment_ref="local",
+    )
+    catalog = Catalog(
+        catalog_id="cat_store_conformance",
+        namespace="store",
+        version="1.0.0",
+        owning_application_id=application.application_id,
+        lifecycle=CatalogLifecycle.ACTIVE,
+        attributes=(
+            AttributeDefinition(
+                key="store.secret",
+                value_type="string",
+                scope=ProfileScope.GLOBAL,
+                sensitivity=Sensitivity.SECRET,
+                visibility=(Visibility.USER,),
+                mutability=(Mutability.USER,),
+            ),
+        ),
+    )
+    invitation = FamilyInvitation(
+        invitation_id="finv_store_conformance",
+        tenant=TENANT,
+        family_scope_id="family:store-conformance",
+        application_id=application.application_id,
+        user_id=USER_ID,
+        primary_email=RAW_FACTOR_VALUE,
+        role="adult",
+        status=InvitationStatus.PENDING,
+        invited_by=actor.subject,
+    )
+    registration = RegistrationSession(
+        tenant=TENANT,
+        registration_id="reg_store_conformance",
+        status=RegistrationStatus.FACTOR_VERIFIED,
+        required_factor_types=(IdentityFactorType.EMAIL,),
+        verified_factor_ids=("fac_store_conformance",),
+        user_id=USER_ID,
+        netkingdom_id="nk-store-conformance",
+        started_by_subject=actor.subject,
+        correlation_id="corr-store",
+    )
+    factor = IdentityFactor(
+        factor_id="fac_store_conformance",
+        factor_type=IdentityFactorType.EMAIL,
+        normalized_value=RAW_FACTOR_VALUE,
+        registration_id=registration.registration_id,
+        user_id=USER_ID,
+        display_value="s***@example.test",
+    )
+    prepared_account = PreparedAccount(
+        tenant=TENANT,
+        prepared_account_id="pacct_store_conformance",
+        required_factor_matches=(
+            PreparedFactorRequirement(
+                factor_type=IdentityFactorType.EMAIL,
+                normalized_value=RAW_FACTOR_VALUE,
+            ),
+        ),
+        entitlements=(
+            PreparedEntitlement(
+                kind=PreparedEntitlementKind.MEMBERSHIP,
+                tenant=TENANT,
+                scope_type="team",
+                scope_id="team:store-conformance",
+                role="member",
+            ),
+        ),
+        display_name="Prepared Store User",
+        primary_email=RAW_FACTOR_VALUE,
+        prepared_by_subject=actor.subject,
+        correlation_id="corr-store",
+    )
+    access_profile = AccessProfile(
+        tenant=TENANT,
+        display_name="Store Member",
+        hat="member",
+        access_profile_id="apf_store_conformance",
+        scope_type=AccessScopeType.TENANT,
+        scope_id=TENANT,
+        membership_requirements=(
+            AccessMembershipRequirement(
+                scope_type="team",
+                scope_id="team:store-conformance",
+                kind="member",
+            ),
+        ),
+        required_factor_types=(IdentityFactorType.EMAIL,),
+        profile_defaults={"store.secret": PROFILE_SECRET_VALUE},
+        claims={"role": "member"},
+    )
+    access_context = ActiveAccessContext(
+        active_context_id="actx_store_conformance",
+        user_id=USER_ID,
+        tenant=TENANT,
+        access_profile_id=access_profile.access_profile_id,
+        hat=access_profile.hat,
+        scope_type=AccessScopeType.TENANT,
+        scope_id=TENANT,
+        membership_ids=(membership.membership_id,),
+        factor_ids=(factor.factor_id,),
+        selected_by_subject=actor.subject,
+    )
+    welcome_protocol = WelcomeProtocol(
+        protocol_id="wpro_store_conformance",
+        tenant=TENANT,
+        name="Store Welcome",
+        trigger_type=OnboardingTriggerType.REGISTRATION,
+        steps=(
+            WelcomeProtocolStep(
+                step_key="profile",
+                title="Complete profile",
+                subsystem="user-account",
+            ),
+        ),
+    )
+    onboarding_journey = OnboardingJourney(
+        journey_id="ojrn_store_conformance",
+        tenant=TENANT,
+        user_id=USER_ID,
+        protocol_id=welcome_protocol.protocol_id,
+        trigger_type=OnboardingTriggerType.REGISTRATION,
+        steps=(
+            OnboardingStep(
+                step_key="profile",
+                title="Complete profile",
+                subsystem="user-account",
+            ),
+        ),
+        source_id=registration.registration_id,
+        source_event_type="registration.completed",
+        correlation_id="corr-store",
+    )
+    profile_value = ProfileValue(
+        user_id=USER_ID,
+        attribute_key="store.secret",
+        value=PROFILE_SECRET_VALUE,
+        scope=ProfileScope.GLOBAL,
+    )
+    audit_record = AuditRecord(
+        audit_id="aud_store_conformance",
+        actor=actor,
+        action="store.write",
+        subject=USER_ID,
+        tenant=TENANT,
+        correlation_id="corr-store",
+        summary="store conformance",
+    )
+    outbox_event = OutboxEvent(
+        event_id="evt_store_conformance",
+        event_type="store.changed",
+        aggregate_id=USER_ID,
+        payload={"kind": "store-conformance"},
+        tenant=TENANT,
+        correlation_id="corr-store",
+    )
+
+    store.save_user(user)
+    store.save_account(account)
+    store.save_identity(identity)
+    store.save_tenant_account(tenant_account)
+    store.save_membership(membership)
+    store.save_application(application)
+    store.save_binding(binding)
+    store.save_catalog(catalog)
+    store.save_family_invitation(invitation)
+    store.save_registration_session(registration)
+    store.save_identity_factor(factor)
+    store.save_prepared_account(prepared_account)
+    store.save_access_profile(access_profile)
+    store.save_active_access_context(access_context)
+    store.save_welcome_protocol(welcome_protocol)
+    store.save_onboarding_journey(onboarding_journey)
+    store.save_profile_value(profile_value)
+    store.append_audit(audit_record)
+    store.append_outbox(outbox_event)
+
+    return {
+        "user": user,
+        "account": account,
+        "identity": identity,
+        "tenant_account": tenant_account,
+        "membership": membership,
+        "application": application,
+        "binding": binding,
+        "catalog": catalog,
+        "invitation": invitation,
+        "registration": registration,
+        "factor": factor,
+        "prepared_account": prepared_account,
+        "access_profile": access_profile,
+        "access_context": access_context,
+        "welcome_protocol": welcome_protocol,
+        "onboarding_journey": onboarding_journey,
+        "profile_value": profile_value,
+        "audit_record": audit_record,
+        "outbox_event": outbox_event,
+    }
+
+
+def _actor() -> Actor:
+    return Actor(
+        issuer="https://issuer.example.test",
+        subject="store-conformance",
+        tenant=TENANT,
+        principal_type=PrincipalType.HUMAN,
+        audience=("user-engine",),
+        roles=("user",),
+        scopes=("profile",),
+    )

tests/test_durable_store_conformance.py

@@ -0,0 +1,42 @@
+import unittest
+
+from user_engine.adapters.local import InMemoryUserEngineStore, SCHEMA_VERSION
+from user_engine.migrations import (
+    LATEST_SCHEMA_VERSION,
+    USER_ENGINE_RECORD_COUNT_KEYS,
+    USER_ENGINE_STORE_RECORD_TYPES,
+    migration_manifest,
+    validate_migration_manifest,
+)
+from user_engine.testing.store_conformance import (
+    assert_user_engine_migration_contract,
+    assert_user_engine_store_conformance,
+)
+
+
+class DurableStoreConformanceTests(unittest.TestCase):
+    def test_migration_manifest_is_ordered_and_provider_safe(self):
+        assert_user_engine_migration_contract(self)
+
+        manifest = migration_manifest()
+
+        self.assertEqual(validate_migration_manifest(), ())
+        self.assertEqual(manifest[-1].version, LATEST_SCHEMA_VERSION)
+        self.assertIn("users", USER_ENGINE_STORE_RECORD_TYPES)
+        self.assertIn("pending_outbox_events", USER_ENGINE_RECORD_COUNT_KEYS)
+
+    def test_local_schema_version_uses_latest_manifest_version(self):
+        store = InMemoryUserEngineStore()
+
+        store.migrate()
+
+        self.assertEqual(SCHEMA_VERSION, LATEST_SCHEMA_VERSION)
+        self.assertEqual(store.schema_version, LATEST_SCHEMA_VERSION)
+        self.assertTrue(store.ready)
+
+    def test_in_memory_store_satisfies_durable_store_contract(self):
+        assert_user_engine_store_conformance(self, InMemoryUserEngineStore)
+
+
+if __name__ == "__main__":
+    unittest.main()

workplans/USER-WP-0016-durable-store-migration-and-conformance-harness.md

@@ -0,0 +1,127 @@
+---
+id: USER-WP-0016
+type: workplan
+title: "Durable Store Migration And Conformance Harness"
+domain: netkingdom
+repo: user-engine
+status: finished
+owner: codex
+topic_slug: netkingdom
+planning_priority: medium
+planning_order: 16
+created: "2026-06-16"
+updated: "2026-06-16"
+depends_on:
+  - USER-WP-0009
+  - USER-WP-0015
+state_hub_workstream_id: "91f9494a-7cc8-4e61-bec8-9440dfe0e63d"
+---
+
+# USER-WP-0016 - Durable Store Migration And Conformance Harness
+
+## Goal
+
+Turn the durable-store follow-up from USER-WP-0009 into an executable adapter
+contract: ordered migrations, a Postgres bootstrap schema, and reusable
+conformance checks that future database-backed stores can run against the same
+behavior as the in-memory reference adapter.
+
+## Scope Direction
+
+This slice should stay inside user-engine and avoid production infrastructure
+dependencies. It should define what a provider-backed adapter must satisfy
+without requiring a live Postgres service in the local unit test suite.
+
+## Non-Goals
+
+- Do not add a production Postgres driver or connection lifecycle.
+- Do not own platform provisioning, credentials, backups, restores, or
+  provider observability.
+- Do not require Docker, a cloud database, or network access for the standard
+  test suite.
+
+## Tasks
+
+```task
+id: USER-WP-0016-T1
+status: done
+priority: high
+state_hub_task_id: "3783e912-76b5-4458-a8c5-a96bc8870e60"
+```
+
+Define an ordered migration manifest with the latest schema version and the
+logical store record types covered by user-engine.
+
+```task
+id: USER-WP-0016-T2
+status: done
+priority: high
+state_hub_task_id: "7d65e1fa-c7fb-4c83-9512-98296e6ccf4b"
+```
+
+Add a Postgres bootstrap SQL file that provider repositories can apply or
+translate when implementing the store boundary.
+
+```task
+id: USER-WP-0016-T3
+status: done
+priority: high
+state_hub_task_id: "c58db383-bfad-4f52-82d4-9d3c4558b1f2"
+```
+
+Add reusable store conformance helpers covering readiness, idempotent
+migration, core save/read methods, tenant and user queries, transaction
+rollback, outbox ordering, and redacted diagnostics.
+
+```task
+id: USER-WP-0016-T4
+status: done
+priority: medium
+state_hub_task_id: "71e51aa8-2a2b-463d-938b-0a1f1261c568"
+```
+
+Run the conformance helpers against `InMemoryUserEngineStore` as the reference
+implementation.
+
+```task
+id: USER-WP-0016-T5
+status: done
+priority: medium
+state_hub_task_id: "e8d7cece-605d-4bb3-b0c6-b03fb908e7c0"
+```
+
+Document how future Postgres/provider adapters should consume the manifest,
+SQL bootstrap file, and conformance harness.
+
+## Acceptance Criteria
+
+- `LATEST_SCHEMA_VERSION` and the local adapter schema version come from the
+  same manifest.
+- The Postgres bootstrap file contains durable tables for schema versions,
+  logical records, audit records, and outbox events.
+- A future adapter can import one conformance helper and run it with its own
+  store factory.
+- Standard local tests prove the harness against the in-memory store.
+- Diagnostics expose counts only and do not leak raw factor or profile values.
+
+## Expected Outputs
+
+- `user_engine.migrations` manifest.
+- `migrations/postgres/0001_user_engine_store.sql`.
+- `user_engine.testing.store_conformance` helper.
+- Store conformance tests.
+- Updated durable-store documentation.
+
+## Implementation Notes
+
+Implemented on 2026-06-16:
+
+- Added an ordered migration manifest with logical record and diagnostic count
+  keys.
+- Added a provider-facing Postgres bootstrap SQL file for the generic record,
+  audit, and outbox storage contract.
+- Added reusable store conformance helpers and reference tests for the
+  in-memory adapter.
+- Aligned local schema readiness with `LATEST_SCHEMA_VERSION`.
+- Documented the harness in the durable-store consumer requirements and
+  contracts docs.