feat: add scopes object array to declarative OAuth spec

airbyte_cdk/models/airbyte_protocol.py

@@ -75,11 +75,70 @@ class AirbyteStateMessage:
     destinationStats: Optional[AirbyteStateStats] = None  # type: ignore [name-defined]
 
 
+# The following dataclasses have been redeclared to include scopes, optional_scopes,
+# and scopes_join_strategy fields that are used by declarative OAuth connectors.
+# The protocol model (OauthConnectorInputSpecification) does not include these fields,
+# so serpyco_rs silently drops them during deserialization. By overriding the model here
+# and cascading through OAuthConfigSpecification → AdvancedAuth → ConnectorSpecification,
+# the fields are preserved in the connector's spec output.
+# This follows the same override pattern used above for AirbyteStateBlob.
+@dataclass
+class OauthConnectorInputSpecification:
+    consent_url: str
+    access_token_url: str
+    scope: Optional[str] = None
+    scopes: Optional[List[Dict[str, Any]]] = None
+    optional_scopes: Optional[List[Dict[str, Any]]] = None
+    scopes_join_strategy: Optional[str] = None
+    access_token_headers: Optional[Dict[str, Any]] = None
+    access_token_params: Optional[Dict[str, Any]] = None
+    extract_output: Optional[List[str]] = None
+    state: Optional[State] = None  # type: ignore [name-defined]
+    client_id_key: Optional[str] = None
+    client_secret_key: Optional[str] = None
+    scope_key: Optional[str] = None
+    state_key: Optional[str] = None
+    auth_code_key: Optional[str] = None
+    redirect_uri_key: Optional[str] = None
+    token_expiry_key: Optional[str] = None
+
+
+@dataclass
+class OAuthConfigSpecification:
+    oauth_user_input_from_connector_config_specification: Optional[Dict[str, Any]] = None
+    oauth_connector_input_specification: Optional[OauthConnectorInputSpecification] = None
+    complete_oauth_output_specification: Optional[Dict[str, Any]] = None
+    complete_oauth_server_input_specification: Optional[Dict[str, Any]] = None
+    complete_oauth_server_output_specification: Optional[Dict[str, Any]] = None
+
+
+@dataclass
+class AdvancedAuth:
+    auth_flow_type: Optional[AuthFlowType] = None  # type: ignore [name-defined]
+    predicate_key: Optional[List[str]] = None
+    predicate_value: Optional[str] = None
+    oauth_config_specification: Optional[OAuthConfigSpecification] = None
+
+
+@dataclass
+class ConnectorSpecification:
+    connectionSpecification: Dict[str, Any]
+    documentationUrl: Optional[str] = None
+    changelogUrl: Optional[str] = None
+    supportsIncremental: Optional[bool] = None
+    supportsNormalization: Optional[bool] = False
+    supportsDBT: Optional[bool] = False
+    supported_destination_sync_modes: Optional[List[DestinationSyncMode]] = None  # type: ignore [name-defined]
+    authSpecification: Optional[AuthSpecification] = None  # type: ignore [name-defined]
+    advanced_auth: Optional[AdvancedAuth] = None
+    protocol_version: Optional[str] = None
+
+
 @dataclass
 class AirbyteMessage:
     type: Type  # type: ignore [name-defined]
     log: Optional[AirbyteLogMessage] = None  # type: ignore [name-defined]
-    spec: Optional[ConnectorSpecification] = None  # type: ignore [name-defined]
+    spec: Optional[ConnectorSpecification] = None
     connectionStatus: Optional[AirbyteConnectionStatus] = None  # type: ignore [name-defined]
     catalog: Optional[AirbyteCatalog] = None  # type: ignore [name-defined]
     record: Optional[AirbyteRecordMessage] = None  # type: ignore [name-defined]

airbyte_cdk/sources/declarative/declarative_component_schema.yaml

@@ -3064,6 +3064,55 @@ definitions:
               The DeclarativeOAuth Specific string of the scopes needed to be grant for authenticated user.
             examples:
               - user:read user:read_orders workspaces:read
+          # NOTE: scopes, optional_scopes, and scopes_join_strategy are processed by the
+          # platform OAuth handler (DeclarativeOAuthSpecHandler.kt), not by the CDK runtime.
+          # The CDK schema defines the manifest contract; the platform reads these fields
+          # during the OAuth consent flow to build the authorization URL.
+          scopes:
+            title: Scopes
+            type: array
+            items:
+              type: object
+              required:
+                - scope
+              properties:
+                scope:
+                  type: string
+                  description: The OAuth scope string to request from the provider.
+              additionalProperties: true
+            description: |-
+              List of OAuth scope objects. When present, takes precedence over the `scope` string property.
+              The scope values are joined using the `scopes_join_strategy` (default: space) before being
+              sent to the OAuth provider.
+            examples:
+              - [{"scope": "user:read"}, {"scope": "user:write"}]
+          optional_scopes:
+            title: Optional Scopes
+            type: array
+            items:
+              type: object
+              required:
+                - scope
+              properties:
+                scope:
+                  type: string
+                  description: The OAuth scope string to request from the provider.
+              additionalProperties: true
+            description: |-
+              Optional OAuth scope objects that may or may not be granted.
+            examples:
+              - [{"scope": "admin:read"}]
+          scopes_join_strategy:
+            title: Scopes Join Strategy
+            type: string
+            enum:
+              - space
+              - comma
+              - plus
+            default: space
+            description: |-
+              The strategy used to join the `scopes` array into a single string for the OAuth request.
+              Defaults to `space` per RFC 6749.
           access_token_url:
             title: Access Token URL
             type: string

airbyte_cdk/sources/declarative/models/declarative_component_schema.py

@@ -20,6 +20,12 @@ class AuthFlowType(Enum):
     oauth1_0 = "oauth1.0"
 
 
+class ScopesJoinStrategy(Enum):
+    space = "space"
+    comma = "comma"
+    plus = "plus"
+
+
 class BasicHttpAuthenticator(BaseModel):
     type: Literal["BasicHttpAuthenticator"]
     username: str = Field(
@@ -827,6 +833,16 @@ class Config:
     max: int
 
 
+class OAuthScope(BaseModel):
+    class Config:
+        extra = Extra.allow
+
+    scope: str = Field(
+        ...,
+        description="The OAuth scope string to request from the provider.",
+    )
+
+
 class OauthConnectorInputSpecification(BaseModel):
     class Config:
         extra = Extra.allow
@@ -846,6 +862,27 @@ class Config:
         examples=["user:read user:read_orders workspaces:read"],
         title="Scopes",
     )
+    # NOTE: scopes, optional_scopes, and scopes_join_strategy are processed by the
+    # platform OAuth handler (DeclarativeOAuthSpecHandler.kt), not by the CDK runtime.
+    # The CDK schema defines the manifest contract; the platform reads these fields
+    # during the OAuth consent flow to build the authorization URL.
+    scopes: Optional[List[OAuthScope]] = Field(
+        None,
+        description="List of OAuth scope objects. When present, takes precedence over the `scope` string property.\nThe scope values are joined using the `scopes_join_strategy` (default: space) before being\nsent to the OAuth provider.",
+        examples=[[{"scope": "user:read"}, {"scope": "user:write"}]],
+        title="Scopes",
+    )
+    optional_scopes: Optional[List[OAuthScope]] = Field(
+        None,
+        description="Optional OAuth scope objects that may or may not be granted.",
+        examples=[[{"scope": "admin:read"}]],
+        title="Optional Scopes",
+    )
+    scopes_join_strategy: Optional[ScopesJoinStrategy] = Field(
+        ScopesJoinStrategy.space,
+        description="The strategy used to join the `scopes` array into a single string for the OAuth request.\nDefaults to `space` per RFC 6749.",
+        title="Scopes Join Strategy",
+    )
     access_token_url: str = Field(
         ...,
         description="The DeclarativeOAuth Specific URL templated string to obtain the `access_token`, `refresh_token` etc.\nThe placeholders are replaced during the processing to provide neccessary values.",

airbyte_cdk/sources/declarative/spec/spec.py

@@ -55,6 +55,16 @@ def generate_spec(self) -> ConnectorSpecification:
             obj["documentationUrl"] = self.documentation_url
         if self.advanced_auth:
             self.advanced_auth.auth_flow_type = self.advanced_auth.auth_flow_type.value  # type: ignore # We know this is always assigned to an AuthFlow which has the auth_flow_type field
+            # Convert scopes_join_strategy enum to its string value (same pattern as auth_flow_type above)
+            oauth_spec = getattr(self.advanced_auth, "oauth_config_specification", None)
+            if oauth_spec:
+                oauth_input = getattr(oauth_spec, "oauth_connector_input_specification", None)
+                if (
+                    oauth_input
+                    and hasattr(oauth_input, "scopes_join_strategy")
+                    and oauth_input.scopes_join_strategy is not None
+                ):
+                    oauth_input.scopes_join_strategy = oauth_input.scopes_join_strategy.value  # type: ignore
             # Map CDK AuthFlow model to protocol AdvancedAuth model
             obj["advanced_auth"] = self.advanced_auth.dict()
 

unit_tests/sources/declarative/spec/test_spec.py

@@ -131,6 +131,7 @@
                         oauth_connector_input_specification=model_declarative_oauth_connector_input_spec(
                             consent_url="https://domain.host.com/endpoint/oauth?{client_id_key}={{client_id_key}}&{redirect_uri_key}={urlEncoder:{{redirect_uri_key}}}&{state_key}={{state_key}}",
                             scope="reports:read campaigns:read",
+                            scopes_join_strategy="space",  # default from component schema, preserved through protocol override
                             access_token_headers={"Content-Type": "application/json"},
                             access_token_params={"{auth_code_key}": "{{auth_code_key}}"},
                             access_token_url="https://domain.host.com/endpoint/v1/oauth2/access_token/",