{
  "schema_version": "offline-clone.backend-model.v1",
  "site_id": "crunchyroll",
  "status": "draft",
  "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": [
          "clone/tests/test_app.py",
          "backend/runtime.json",
          "clone/backend/site_schema.py"
        ]
      },
      {
        "obligation": "schema-migration",
        "status": "verified",
        "evidence": [
          "clone/tests/test_app.py",
          "backend/runtime.json",
          "clone/backend/site_schema.py"
        ]
      },
      {
        "obligation": "deterministic-reset",
        "status": "verified",
        "evidence": [
          "clone/tests/test_app.py",
          "backend/runtime.json",
          "clone/backend/site_schema.py"
        ]
      },
      {
        "obligation": "restart-persistence",
        "status": "verified",
        "evidence": [
          "clone/tests/test_app.py",
          "backend/runtime.json",
          "clone/backend/site_schema.py"
        ]
      },
      {
        "obligation": "backup-restore",
        "status": "verified",
        "evidence": [
          "clone/tests/test_app.py"
        ]
      },
      {
        "obligation": "concurrency",
        "status": "verified",
        "evidence": [
          "clone/tests/test_app.py"
        ]
      }
    ]
  },
  "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": "implemented",
      "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": [
        "register-mega-fan-local"
      ],
      "invariant_ids": [
        "validation-before-mutation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "duplicate",
          "stale",
          "foreign-owner",
          "unauthorized-role",
          "restart",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "account-sign-in",
      "label": "Password-based local account sign-in",
      "priority": "p0",
      "category": "authentication",
      "implementation_status": "implemented",
      "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": [
        "signin-watch-resume"
      ],
      "invariant_ids": [
        "account-isolation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "duplicate",
          "stale",
          "foreign-owner",
          "unauthorized-role",
          "restart",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "session-lifecycle",
      "label": "Anonymous and authenticated browser sessions",
      "priority": "p0",
      "category": "authentication",
      "implementation_status": "implemented",
      "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": [
        "signin-watch-resume",
        "manage-profile-account"
      ],
      "invariant_ids": [
        "account-isolation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "duplicate",
          "stale",
          "foreign-owner",
          "unauthorized-role",
          "restart",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "password-recovery",
      "label": "Enumeration-resistant local password recovery",
      "priority": "p0",
      "category": "authentication",
      "implementation_status": "implemented",
      "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-recovery-support"
      ],
      "invariant_ids": [
        "validation-before-mutation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "duplicate",
          "stale",
          "foreign-owner",
          "unauthorized-role",
          "restart",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "email-delivery",
      "label": "Truthful local verification and recovery mail outbox",
      "priority": "p0",
      "category": "communication",
      "implementation_status": "implemented",
      "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": [
        "register-mega-fan-local",
        "auth-recovery-support"
      ],
      "invariant_ids": [
        "account-isolation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "duplicate",
          "stale",
          "foreign-owner",
          "unauthorized-role",
          "restart",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "catalog-discovery",
      "label": "Deterministic local anime catalog and search",
      "priority": "p0",
      "category": "search",
      "implementation_status": "implemented",
      "entities": [
        {
          "name": "catalog-record",
          "identity": "stable catalog-record identity scoped by authenticated subject_id",
          "owner_scope": "account",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "entity-lifecycle",
        "states": [
          "available",
          "matched",
          "empty"
        ],
        "transitions": [
          {
            "from": "available",
            "to": "matched",
            "trigger": "local query matches title or genre"
          },
          {
            "from": "matched",
            "to": "empty",
            "trigger": "impossible query returns no records"
          }
        ]
      },
      "server_authorities": [
        "The server resolves the stable subject owner from the authenticated session.",
        "Every mutation and lookup is scoped by owner in the site SQLite database."
      ],
      "external_effect": "none",
      "journey_ids": [
        "discover-title"
      ],
      "invariant_ids": [
        "catalog-consistency"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "duplicate",
          "stale",
          "foreign-owner",
          "unauthorized-role",
          "restart",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "profile-library-progress",
      "label": "Owner-bound profiles, watchlist and playback progress",
      "priority": "p0",
      "category": "personalization",
      "implementation_status": "implemented",
      "entities": [
        {
          "name": "viewing-state",
          "identity": "stable viewing-state identity scoped by authenticated subject_id",
          "owner_scope": "account",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "idempotent-set",
        "states": [
          "empty",
          "populated",
          "updated"
        ],
        "transitions": [
          {
            "from": "empty",
            "to": "populated",
            "trigger": "authenticated owner adds a title or profile"
          },
          {
            "from": "populated",
            "to": "updated",
            "trigger": "authenticated owner switches profile or saves progress"
          }
        ]
      },
      "server_authorities": [
        "The server resolves the stable subject owner from the authenticated session.",
        "Every mutation and lookup is scoped by owner in the site SQLite database."
      ],
      "external_effect": "none",
      "journey_ids": [
        "signin-watch-resume",
        "manage-profile-account"
      ],
      "invariant_ids": [
        "account-isolation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ],
          "duplicate": [
            "clone/tests/test_app.py"
          ],
          "foreign-owner": [
            "clone/tests/test_app.py"
          ],
          "restart": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "stale",
          "unauthorized-role",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "account-preferences",
      "label": "Owner-bound playback, language, notification, privacy and device preferences",
      "priority": "p1",
      "category": "administration",
      "implementation_status": "implemented",
      "entities": [
        {
          "name": "account-preference",
          "identity": "stable account-preference identity scoped by authenticated subject_id",
          "owner_scope": "account",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "entity-lifecycle",
        "states": [
          "seeded",
          "updated"
        ],
        "transitions": [
          {
            "from": "seeded",
            "to": "updated",
            "trigger": "authenticated owner saves allowlisted settings"
          }
        ]
      },
      "server_authorities": [
        "The server resolves the stable subject owner from the authenticated session.",
        "Every mutation and lookup is scoped by owner in the site SQLite database."
      ],
      "external_effect": "none",
      "journey_ids": [
        "manage-profile-account"
      ],
      "invariant_ids": [
        "account-isolation",
        "validation-before-mutation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "foreign-owner": [
            "clone/tests/test_app.py"
          ],
          "restart": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "invalid",
          "duplicate",
          "stale",
          "unauthorized-role",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    },
    {
      "id": "sandbox-subscription",
      "label": "Transactional local-sandbox subscription and history",
      "priority": "p0",
      "category": "commerce",
      "implementation_status": "implemented",
      "entities": [
        {
          "name": "subscription-receipt",
          "identity": "stable subscription-receipt identity scoped by authenticated subject_id",
          "owner_scope": "account",
          "persistence": "durable"
        }
      ],
      "state_machine": {
        "kind": "immutable-receipt",
        "states": [
          "review",
          "declined",
          "retryable",
          "active"
        ],
        "transitions": [
          {
            "from": "review",
            "to": "declined",
            "trigger": "sandbox decline is recorded without subscription mutation"
          },
          {
            "from": "review",
            "to": "retryable",
            "trigger": "sandbox retry leaves subscription unchanged"
          },
          {
            "from": "review",
            "to": "active",
            "trigger": "approval is consumed atomically with subscription and history"
          }
        ]
      },
      "server_authorities": [
        "The server resolves the stable subject owner from the authenticated session.",
        "Every mutation and lookup is scoped by owner in the site SQLite database."
      ],
      "external_effect": "none",
      "journey_ids": [
        "register-mega-fan-local",
        "manage-profile-account"
      ],
      "invariant_ids": [
        "local-sandbox-only",
        "account-isolation",
        "validation-before-mutation"
      ],
      "proofs": {
        "evidence": {
          "valid": [
            "clone/tests/test_app.py"
          ],
          "invalid": [
            "clone/tests/test_app.py"
          ],
          "duplicate": [
            "clone/tests/test_app.py"
          ],
          "stale": [
            "clone/tests/test_app.py"
          ],
          "foreign-owner": [
            "clone/tests/test_app.py"
          ],
          "restart": [
            "clone/tests/test_app.py"
          ]
        },
        "planned": [
          "unauthorized-role",
          "migration",
          "concurrency"
        ],
        "not_applicable": []
      }
    }
  ],
  "r1_subject_binding": {
    "identity_kind": "stable authenticated account subject id",
    "identity_path": "resolve_session.account.subject_id",
    "model_path": "backend/model.json capabilities and entity owner_scope",
    "contract_component": "account-isolation invariant and subject-prefixed business owner keys",
    "source_evidence_component": "scope/invariants.json account-isolation plus clone/tests/test_app.py",
    "self_digest_disposition": "session_owner_digest is not used as business ownership because session rotation must preserve account state"
  }
}