{
  "schema_version": "offline-clone.backend-model.v1",
  "site_id": "curology",
  "status": "verified",
  "profile": "offline-benchmark",
  "database": {
    "engine": "sqlite",
    "location_policy": "runtime-data-outside-candidate",
    "concurrency_model": "wal-transactional-single-writer",
    "migration_strategy": "versioned-forward-migrations",
    "deterministic_reset": true,
    "restart_persistence": true,
    "site_isolation": "one-database-per-site",
    "proofs": [
      {
        "obligation": "data-location",
        "status": "verified",
        "evidence": ["backend/runtime.json", "clone/tests/test_smoke.py::test_healthz_reports_isolated_runtime"]
      },
      {
        "obligation": "schema-migration",
        "status": "verified",
        "evidence": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards", "backend.curology_schema:migrate_v2"]
      },
      {
        "obligation": "deterministic-reset",
        "status": "verified",
        "evidence": ["clone/tests/conftest.py::reset_site"]
      },
      {
        "obligation": "restart-persistence",
        "status": "verified",
        "evidence": ["clone/tests/test_tasks.py::test_restart_persistence_and_no_card_or_remote_runtime_urls"]
      },
      {
        "obligation": "backup-restore",
        "status": "verified",
        "evidence": ["Prompt B v1 database copy reopened and forward-migrated under the current runtime"]
      },
      {
        "obligation": "concurrency",
        "status": "verified",
        "evidence": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"]
      }
    ]
  },
  "auth_semantics": {
    "account_database_scope": "site-isolated",
    "credential_storage": "salted-scrypt-hash",
    "session_storage": "opaque-cookie-digest-at-rest",
    "registration_account_creation": "after-email-verification",
    "verification_challenge_storage": "salted-hash",
    "password_reset_enumeration": "indistinguishable-public-response",
    "mail_default": "LOCAL_ONLY",
    "mail_statuses": [
      "LOCAL_ONLY",
      "SMTP_PENDING",
      "SMTP_SENT",
      "SMTP_FAILED"
    ],
    "smtp_activation": "explicit-complete-config-only",
    "smtp_delivery_ceiling": 3,
    "rejected_secret_journaling": "forbidden",
    "legacy_write_policy": "read-compatible-write-rejected"
  },
  "common_capabilities": {
    "account_registration": "account-registration",
    "account_sign_in": "account-sign-in",
    "session_lifecycle": "session-lifecycle",
    "password_recovery": "password-recovery",
    "email_delivery": "email-delivery"
  },
  "capabilities": [
    {
      "id": "account-registration",
      "label": "Verified local account registration",
      "priority": "p0",
      "category": "authentication",
      "implementation_status": "verified",
      "entities": [
        {
          "name": "pending-registration",
          "identity": "opaque pending id bound to one browser session",
          "owner_scope": "session",
          "persistence": "durable"
        },
        {
          "name": "local-account",
          "identity": "site-local account id and unique normalized email",
          "owner_scope": "account",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "challenge-lifecycle",
        "states": [
          "collecting",
          "pending-verification",
          "verified",
          "account-created",
          "expired",
          "locked"
        ],
        "transitions": [
          {
            "from": "collecting",
            "to": "pending-verification",
            "trigger": "validated registration request"
          },
          {
            "from": "pending-verification",
            "to": "verified",
            "trigger": "correct unexpired code within attempt budget"
          },
          {
            "from": "verified",
            "to": "account-created",
            "trigger": "transactional account creation and session rotation"
          },
          {
            "from": "pending-verification",
            "to": "expired",
            "trigger": "challenge expiry"
          },
          {
            "from": "pending-verification",
            "to": "locked",
            "trigger": "verification attempt budget exhausted"
          }
        ]
      },
      "server_authorities": [
        "The server normalizes identity and hashes password and code.",
        "An account is created only after successful verification.",
        "Duplicate normalized email creation is rejected transactionally."
      ],
      "external_effect": "none",
      "journey_ids": ["questionnaire-checkout", "auth-and-recovery"],
      "invariant_ids": ["server-authoritative-owner-state", "local-mail-truth", "restart-persistence"],
      "proofs": {
        "evidence": {
          "valid": ["clone/tests/test_tasks.py::test_checkout_outcomes_registration_activation_and_idempotency"],
          "invalid": ["clone/tests/test_tasks.py::test_auth_failure_duplicate_verification_and_safe_return_paths"],
          "duplicate": ["clone/tests/test_tasks.py::test_auth_failure_duplicate_verification_and_safe_return_paths"],
          "restart": ["clone/tests/test_tasks.py::test_restart_persistence_and_no_card_or_remote_runtime_urls"],
          "migration": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"],
          "concurrency": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"]
        },
        "planned": [],
        "not_applicable": [
          {"obligation": "stale", "rationale": "The generated registration challenge runtime owns expiry; the site does not add an independent clock or stale-state seam."},
          {"obligation": "foreign-owner", "rationale": "Pending registration is bound to one browser session and has no caller-selectable owner identifier."},
          {"obligation": "unauthorized-role", "rationale": "Registration has no privileged role variant in the Curology task scope."}
        ]
      }
    },
    {
      "id": "account-sign-in",
      "label": "Password-based local account sign-in",
      "priority": "p0",
      "category": "authentication",
      "implementation_status": "verified",
      "entities": [
        {
          "name": "local-account",
          "identity": "site-local account id and normalized email",
          "owner_scope": "account",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "entity-lifecycle",
        "states": [
          "signed-out",
          "identified",
          "authenticated",
          "rejected"
        ],
        "transitions": [
          {
            "from": "signed-out",
            "to": "identified",
            "trigger": "normalized email submitted"
          },
          {
            "from": "identified",
            "to": "authenticated",
            "trigger": "constant-time password verification succeeds"
          },
          {
            "from": "identified",
            "to": "rejected",
            "trigger": "credentials are invalid"
          }
        ]
      },
      "server_authorities": [
        "The server verifies salted password hashes.",
        "The server rotates the authenticated session.",
        "Client-selected fixture identity is not authentication."
      ],
      "external_effect": "none",
      "journey_ids": ["local-subscription-management", "auth-and-recovery"],
      "invariant_ids": ["server-authoritative-owner-state", "restart-persistence"],
      "proofs": {
        "evidence": {
          "valid": ["clone/tests/test_tasks.py::test_auth_failure_duplicate_verification_and_safe_return_paths"],
          "invalid": ["clone/tests/test_tasks.py::test_auth_failure_duplicate_verification_and_safe_return_paths"],
          "restart": ["clone/tests/test_tasks.py::test_restart_persistence_and_no_card_or_remote_runtime_urls"],
          "migration": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"],
          "concurrency": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"]
        },
        "planned": [],
        "not_applicable": [
          {"obligation": "duplicate", "rationale": "Sign-in is an authentication check and does not create a duplicate business entity."},
          {"obligation": "stale", "rationale": "Credentials are verified against current server state; there is no caller-supplied revision to become stale."},
          {"obligation": "foreign-owner", "rationale": "The server resolves ownership from the authenticated identity; callers cannot select another owner."},
          {"obligation": "unauthorized-role", "rationale": "The scoped local subscriber model has no privileged role variant."}
        ]
      }
    },
    {
      "id": "session-lifecycle",
      "label": "Anonymous and authenticated browser sessions",
      "priority": "p0",
      "category": "authentication",
      "implementation_status": "verified",
      "entities": [
        {
          "name": "browser-session",
          "identity": "opaque cookie token with digest persisted at rest",
          "owner_scope": "session",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "session-lifecycle",
        "states": [
          "anonymous",
          "authenticated",
          "revoked",
          "expired"
        ],
        "transitions": [
          {
            "from": "anonymous",
            "to": "authenticated",
            "trigger": "successful sign-in or registration rotates session"
          },
          {
            "from": "authenticated",
            "to": "revoked",
            "trigger": "sign-out or security reset"
          },
          {
            "from": "anonymous",
            "to": "expired",
            "trigger": "session expiry"
          },
          {
            "from": "authenticated",
            "to": "expired",
            "trigger": "session expiry"
          }
        ]
      },
      "server_authorities": [
        "Raw session tokens are never stored in the database.",
        "Ownership is resolved from the server-side session record.",
        "Sign-out revokes server-side authority before deleting the cookie."
      ],
      "external_effect": "none",
      "journey_ids": ["questionnaire-checkout", "local-subscription-management", "auth-and-recovery"],
      "invariant_ids": ["server-authoritative-owner-state", "restart-persistence", "zero-remote-runtime"],
      "proofs": {
        "evidence": {
          "valid": ["clone/tests/test_tasks.py::test_auth_failure_duplicate_verification_and_safe_return_paths"],
          "invalid": ["clone/tests/test_tasks.py::test_auth_failure_duplicate_verification_and_safe_return_paths"],
          "foreign-owner": ["clone/tests/test_tasks.py::test_permissions_cross_actor_isolation_and_local_contact"],
          "restart": ["clone/tests/test_tasks.py::test_restart_persistence_and_no_card_or_remote_runtime_urls"],
          "migration": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"],
          "concurrency": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"]
        },
        "planned": [],
        "not_applicable": [
          {"obligation": "duplicate", "rationale": "Session creation rotates or resolves an opaque token and does not expose a duplicate entity operation."},
          {"obligation": "stale", "rationale": "Expiry and revocation are enforced inside the generated session runtime rather than by caller revisions."},
          {"obligation": "unauthorized-role", "rationale": "The scoped local subscriber session has no privileged role variant."}
        ]
      }
    },
    {
      "id": "password-recovery",
      "label": "Enumeration-resistant local password recovery",
      "priority": "p0",
      "category": "authentication",
      "implementation_status": "verified",
      "entities": [
        {
          "name": "password-reset-challenge",
          "identity": "opaque reset id bound to one browser session",
          "owner_scope": "session",
          "persistence": "durable"
        },
        {
          "name": "local-account",
          "identity": "nullable concealed account binding",
          "owner_scope": "account",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "challenge-lifecycle",
        "states": [
          "requested",
          "verified",
          "consumed",
          "expired",
          "locked"
        ],
        "transitions": [
          {
            "from": "requested",
            "to": "verified",
            "trigger": "correct unexpired code within attempt budget"
          },
          {
            "from": "verified",
            "to": "consumed",
            "trigger": "password is replaced and sessions are revoked"
          },
          {
            "from": "requested",
            "to": "expired",
            "trigger": "challenge expiry"
          },
          {
            "from": "requested",
            "to": "locked",
            "trigger": "verification attempt budget exhausted"
          }
        ]
      },
      "server_authorities": [
        "Known and unknown emails receive indistinguishable public responses.",
        "Only the server binds a reset flow to an account.",
        "Password replacement revokes prior authenticated sessions."
      ],
      "external_effect": "local-only",
      "journey_ids": ["auth-and-recovery"],
      "invariant_ids": ["local-mail-truth", "server-authoritative-owner-state", "restart-persistence"],
      "proofs": {
        "evidence": {
          "valid": ["clone/tests/test_tasks.py::test_password_recovery_is_local_only_and_rotates_session"],
          "invalid": ["clone/tests/test_tasks.py::test_password_recovery_is_local_only_and_rotates_session"],
          "restart": ["clone/tests/test_tasks.py::test_restart_persistence_and_no_card_or_remote_runtime_urls"],
          "migration": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"],
          "concurrency": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"]
        },
        "planned": [],
        "not_applicable": [
          {"obligation": "duplicate", "rationale": "A reset challenge is session-bound and replacement consumes it; no duplicate business entity is created."},
          {"obligation": "stale", "rationale": "Challenge expiry is enforced by the generated auth runtime and is not a site-defined caller revision."},
          {"obligation": "foreign-owner", "rationale": "The server conceals and binds the account internally; callers cannot select another owner."},
          {"obligation": "unauthorized-role", "rationale": "Password recovery has no privileged role variant in the Curology task scope."}
        ]
      }
    },
    {
      "id": "email-delivery",
      "label": "Truthful local verification and recovery mail outbox",
      "priority": "p0",
      "category": "communication",
      "implementation_status": "verified",
      "entities": [
        {
          "name": "mail-outbox-entry",
          "identity": "site-local outbox id and purpose-bound flow id",
          "owner_scope": "system",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "delivery-lifecycle",
        "states": [
          "local-only",
          "smtp-pending",
          "smtp-sent",
          "smtp-failed"
        ],
        "transitions": [
          {
            "from": "local-only",
            "to": "smtp-pending",
            "trigger": "operator enables complete explicit SMTP configuration"
          },
          {
            "from": "smtp-pending",
            "to": "smtp-sent",
            "trigger": "SMTP transport confirms delivery handoff"
          },
          {
            "from": "smtp-pending",
            "to": "smtp-failed",
            "trigger": "delivery attempt fails or ceiling is reached"
          },
          {
            "from": "smtp-failed",
            "to": "smtp-pending",
            "trigger": "bounded idempotent retry below the delivery ceiling"
          }
        ]
      },
      "server_authorities": [
        "Offline mode records LOCAL_ONLY and never claims external delivery.",
        "SMTP is disabled unless every required setting is present.",
        "Claim, retry, and startup replay share one delivery ceiling."
      ],
      "external_effect": "local-only",
      "journey_ids": ["questionnaire-checkout", "auth-and-recovery"],
      "invariant_ids": ["local-mail-truth", "zero-remote-runtime", "restart-persistence"],
      "proofs": {
        "evidence": {
          "valid": ["clone/tests/test_tasks.py::test_checkout_outcomes_registration_activation_and_idempotency", "clone/tests/test_tasks.py::test_password_recovery_is_local_only_and_rotates_session"],
          "restart": ["clone/tests/test_tasks.py::test_restart_persistence_and_no_card_or_remote_runtime_urls"],
          "migration": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"],
          "concurrency": ["clone/tests/test_tasks.py::test_migration_concurrency_and_payment_ownership_guards"]
        },
        "planned": [],
        "not_applicable": [
          {"obligation": "invalid", "rationale": "The site does not expose a generic mail-send API; only validated registration and recovery flows create local outbox entries."},
          {"obligation": "duplicate", "rationale": "Delivery deduplication is owned by the generated outbox runtime and no site-level duplicate-send action exists."},
          {"obligation": "stale", "rationale": "The site remains LOCAL_ONLY and does not expose a caller-controlled delivery claim or revision."},
          {"obligation": "foreign-owner", "rationale": "Outbox entries are created from server-bound auth flows; callers cannot choose an owner."},
          {"obligation": "unauthorized-role", "rationale": "The local outbox has no role-gated sender surface in this task scope."}
        ]
      }
    }
  ]
}