Add copyright and license

Signed-off-by: Kévin Commaille <zecakeh@tedomum.fr>

content/client-server-api/_index.md

@@ -2277,29 +2277,21 @@ in a browser.
 ##### Account management URL discovery
 
 The [OAuth 2.0 authorization server metadata](#server-metadata-discovery) is
-extended to include the following fields:
+extended to include the following **optional** fields.
 
-| Field                                  | Description                                                                                     |
-|----------------------------------------|-------------------------------------------------------------------------------------------------|
-| `account_management_uri`               | The URL where the user is able to access the account management capabilities of the homeserver. |
-| `account_management_actions_supported` | An array of actions that the account management URL supports, as defined below.                 |
+{{% definition path="schemas/oauth2-account-management-server-metadata" %}}
 
 ##### Account management URL parameters
 
-The account management URL MAY accept the following query parameters:
+The account management URL MAY accept the following minimum query parameters.
 
-| Parameter   | Description                                                                                                                           |
-|-------------|---------------------------------------------------------------------------------------------------------------------------------------|
-| `action`    | **Optional**. The action that the user wishes to take. Must match one of the actions in `account_management_actions_supported` above. |
-| `device_id` | **Optional**. Identifies a particular Matrix device ID for actions that support it.                                                   |
-
-If the `org.matrix.device_view` or `org.matrix.device_delete` actions are
-advertised as supported by the server then the server SHOULD support the
-`device_id` parameter.
+{{% definition path="schemas/oauth2-account-management-url" %}}
 
 ##### Account management URL actions
 
-The following account management actions are defined:
+Account management actions are unique to the application. They SHOULD follow the
+[Common Namespaced Identifier Grammar](/appendices/#common-namespaced-identifier-grammar)
+where feasible. The Matrix-specific actions are:
 
 | Action                           | Description                                                                                                                                          |
 |----------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------|

data/schemas/oauth2-account-management-action.yaml

@@ -0,0 +1,22 @@
+# Copyright 2026 The Matrix.org Foundation C.I.C.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+type: string
+enum:
+  - "org.matrix.profile"
+  - "org.matrix.devices_list"
+  - "org.matrix.device_view"
+  - "org.matrix.device_delete"
+  - "org.matrix.account_deactivate"
+  - "org.matrix.cross_signing_reset"
+description: An action that the account management URL supports.

data/schemas/oauth2-account-management-server-metadata.yaml

@@ -0,0 +1,29 @@
+# Copyright 2026 The Matrix.org Foundation C.I.C.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+type: object
+title: OAuth 2.0 Server Metadata Account Management Extension
+properties:
+  account_management_uri:
+    type: string
+    format: uri
+    description: |-
+      The URL where the user is able to access the account management capabilities of the
+      homeserver.
+  account_management_actions_supported:
+    type: array
+    description: |-
+      List of [actions](/client-server-api/#account-management-url-actions) that the account
+      management URL supports.
+    items:
+      $ref: ./oauth2-account-management-action.yaml

data/schemas/oauth2-account-management-url.yaml

@@ -0,0 +1,29 @@
+# Copyright 2026 The Matrix.org Foundation C.I.C.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+type: object
+title: OAuth 2.0 Account Management URL Query Parameters
+properties:
+  action:
+    $ref: ./oauth2-account-management-action.yaml
+    description: |-
+      The action that the user wishes to take. Must match one of the actions advertised by the
+      server in [`account_management_actions_supported`](/client-server-api/#account-management-url-discovery).
+  device_id:
+    type: string
+    description: |-
+      For Matrix-specific actions, the user's device ID. Actions which don't support the device ID
+      will ignore it.
+
+      If the `org.matrix.device_view` or `org.matrix.device_delete` actions are advertised as
+      supported by the server then the server SHOULD support the `device_id` parameter.