Add new endpoint for listing rules for a gate

.generator/schemas/v2/openapi.yaml

@@ -17075,6 +17075,12 @@ components:
       required:
       - id
       type: object
+    DeploymentGateRulesResponse:
+      description: Response for a deployment gate rules.
+      properties:
+        data:
+          $ref: '#/components/schemas/ListDeploymentRuleResponseData'
+      type: object
     DeploymentMetadata:
       description: Metadata object containing the publication creation information.
       properties:
@@ -30199,6 +30205,37 @@ components:
       type: string
       x-enum-varnames:
       - LIST_CONNECTIONS_RESPONSE
+    ListDeploymentRuleResponseData:
+      description: Data for a list of deployment rules.
+      properties:
+        attributes:
+          $ref: '#/components/schemas/ListDeploymentRulesResponseDataAttributes'
+        id:
+          description: Unique identifier of the deployment rule.
+          example: 1111-2222-3333-4444-555566667777
+          type: string
+        type:
+          $ref: '#/components/schemas/ListDeploymentRulesDataType'
+      required:
+      - type
+      - attributes
+      - id
+      type: object
+    ListDeploymentRulesDataType:
+      description: List deployment rule resource type.
+      enum:
+      - list_deployment_rules
+      example: list_deployment_rules
+      type: string
+      x-enum-varnames:
+      - LIST_DEPLOYMENT_RULES
+    ListDeploymentRulesResponseDataAttributes:
+      properties:
+        rules:
+          items:
+            $ref: '#/components/schemas/DeploymentRuleResponseDataAttributes'
+          type: array
+      type: object
     ListDevicesResponse:
       description: List devices response.
       properties:
@@ -66236,6 +66273,50 @@ paths:
 
         If you have any feedback, contact [Datadog support](https://docs.datadoghq.com/help/).'
   /api/v2/deployment_gates/{gate_id}/rules:
+    get:
+      description: Endpoint to get rules for a deployment gate.
+      operationId: GetDeploymentGateRules
+      parameters:
+      - description: The ID of the deployment gate.
+        in: path
+        name: gate_id
+        required: true
+        schema:
+          type: string
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/DeploymentGateRulesResponse'
+          description: OK
+        '400':
+          $ref: '#/components/responses/HTTPCDGatesBadRequestResponse'
+        '401':
+          $ref: '#/components/responses/UnauthorizedResponse'
+        '403':
+          $ref: '#/components/responses/ForbiddenResponse'
+        '429':
+          $ref: '#/components/responses/TooManyRequestsResponse'
+        '500':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/HTTPCIAppErrors'
+          description: Internal Server Error
+      security:
+      - apiKeyAuth: []
+        appKeyAuth: []
+      summary: Get rules for a deployment gate
+      tags:
+      - Deployment Gates
+      x-permission:
+        operator: OR
+        permissions:
+        - deployment_gates_read
+      x-unstable: '**Note**: This endpoint is in preview and may be subject to change.
+
+        If you have any feedback, contact [Datadog support](https://docs.datadoghq.com/help/).'
     post:
       description: Endpoint to create a deployment rule. A gate for the rule must
         already exist.

cassettes/v2/Deployment-Gates_4242274226/Get-rules-for-a-deployment-gate-returns-OK-response_353728880/frozen.json

@@ -0,0 +1 @@
+"2025-12-10T19:27:22.958Z"

cassettes/v2/Deployment-Gates_4242274226/Get-rules-for-a-deployment-gate-returns-OK-response_353728880/recording.har

@@ -0,0 +1,147 @@
+{
+  "log": {
+    "_recordingName": "Deployment Gates/Get rules for a deployment gate returns \"OK\" response",
+    "creator": {
+      "comment": "persister:fs",
+      "name": "Polly.JS",
+      "version": "6.0.5"
+    },
+    "entries": [
+      {
+        "_id": "42cfce0685efeac3923b49c239f22198",
+        "_order": 0,
+        "cache": {},
+        "request": {
+          "bodySize": 189,
+          "cookies": [],
+          "headers": [
+            {
+              "_fromType": "array",
+              "name": "accept",
+              "value": "application/json"
+            },
+            {
+              "_fromType": "array",
+              "name": "content-type",
+              "value": "application/json"
+            }
+          ],
+          "headersSize": 570,
+          "httpVersion": "HTTP/1.1",
+          "method": "POST",
+          "postData": {
+            "mimeType": "application/json",
+            "params": [],
+            "text": "{\"data\":{\"attributes\":{\"dry_run\":false,\"env\":\"production\",\"identifier\":\"my-gate-testgetrulesforadeploymentgatereturnsokresponse1765394842\",\"service\":\"my-service\"},\"type\":\"deployment_gate\"}}"
+          },
+          "queryString": [],
+          "url": "https://api.datadoghq.com/api/v2/deployment_gates"
+        },
+        "response": {
+          "bodySize": 573,
+          "content": {
+            "mimeType": "application/vnd.api+json",
+            "size": 573,
+            "text": "{\"data\":{\"id\":\"718d7fb4-bbc4-4b69-8a1b-98dda014726d\",\"type\":\"deployment_gate\",\"attributes\":{\"created_at\":\"2025-12-10T19:27:24.004043Z\",\"created_by\":{\"id\":\"9919ec9b-ebc7-49ee-8dc8-03626e717cca\",\"name\":\"CI Account\",\"handle\":\"9919ec9b-ebc7-49ee-8dc8-03626e717cca\"},\"dry_run\":false,\"env\":\"production\",\"identifier\":\"my-gate-testgetrulesforadeploymentgatereturnsokresponse1765394842\",\"service\":\"my-service\",\"updated_at\":\"2025-12-10T19:27:24.004043Z\",\"updated_by\":{\"id\":\"9919ec9b-ebc7-49ee-8dc8-03626e717cca\",\"name\":\"CI Account\",\"handle\":\"9919ec9b-ebc7-49ee-8dc8-03626e717cca\"}}}}"
+          },
+          "cookies": [],
+          "headers": [
+            {
+              "name": "content-type",
+              "value": "application/vnd.api+json"
+            }
+          ],
+          "headersSize": 683,
+          "httpVersion": "HTTP/1.1",
+          "redirectURL": "",
+          "status": 200,
+          "statusText": "OK"
+        },
+        "startedDateTime": "2025-12-10T19:27:23.712Z",
+        "time": 378
+      },
+      {
+        "_id": "b5e8c70aad196d0736b7d54d5d8fb062",
+        "_order": 0,
+        "cache": {},
+        "request": {
+          "bodySize": 0,
+          "cookies": [],
+          "headers": [
+            {
+              "_fromType": "array",
+              "name": "accept",
+              "value": "application/json"
+            }
+          ],
+          "headersSize": 562,
+          "httpVersion": "HTTP/1.1",
+          "method": "GET",
+          "queryString": [],
+          "url": "https://api.datadoghq.com/api/v2/deployment_gates/718d7fb4-bbc4-4b69-8a1b-98dda014726d/rules"
+        },
+        "response": {
+          "bodySize": 111,
+          "content": {
+            "mimeType": "application/vnd.api+json",
+            "size": 111,
+            "text": "{\"data\":{\"id\":\"718d7fb4-bbc4-4b69-8a1b-98dda014726d\",\"type\":\"list_deployment_rules\",\"attributes\":{\"rules\":[]}}}"
+          },
+          "cookies": [],
+          "headers": [
+            {
+              "name": "content-type",
+              "value": "application/vnd.api+json"
+            }
+          ],
+          "headersSize": 681,
+          "httpVersion": "HTTP/1.1",
+          "redirectURL": "",
+          "status": 200,
+          "statusText": "OK"
+        },
+        "startedDateTime": "2025-12-10T19:27:24.098Z",
+        "time": 340
+      },
+      {
+        "_id": "b6dc9bafbd4972fbfe63acda919b9dd1",
+        "_order": 0,
+        "cache": {},
+        "request": {
+          "bodySize": 0,
+          "cookies": [],
+          "headers": [
+            {
+              "_fromType": "array",
+              "name": "accept",
+              "value": "*/*"
+            }
+          ],
+          "headersSize": 544,
+          "httpVersion": "HTTP/1.1",
+          "method": "DELETE",
+          "queryString": [],
+          "url": "https://api.datadoghq.com/api/v2/deployment_gates/718d7fb4-bbc4-4b69-8a1b-98dda014726d"
+        },
+        "response": {
+          "bodySize": 0,
+          "content": {
+            "mimeType": "text/plain",
+            "size": 0
+          },
+          "cookies": [],
+          "headers": [],
+          "headersSize": 623,
+          "httpVersion": "HTTP/1.1",
+          "redirectURL": "",
+          "status": 204,
+          "statusText": "No Content"
+        },
+        "startedDateTime": "2025-12-10T19:27:24.443Z",
+        "time": 317
+      }
+    ],
+    "pages": [],
+    "version": "1.2"
+  }
+}

features/v2/deployment_gates.feature

@@ -207,6 +207,23 @@ Feature: Deployment Gates
     When the request is sent
     Then the response status is 200 OK
 
+  @generated @skip @team:DataDog/ci-app-backend
+  Scenario: Get rules for a deployment gate returns "Bad request." response
+    Given operation "GetDeploymentGateRules" enabled
+    And new "GetDeploymentGateRules" request
+    And request contains "gate_id" parameter from "REPLACE.ME"
+    When the request is sent
+    Then the response status is 400 Bad request.
+
+  @team:DataDog/ci-app-backend
+  Scenario: Get rules for a deployment gate returns "OK" response
+    Given there is a valid "deployment_gate" in the system
+    And operation "GetDeploymentGateRules" enabled
+    And new "GetDeploymentGateRules" request
+    And request contains "gate_id" parameter from "deployment_gate.data.id"
+    When the request is sent
+    Then the response status is 200 OK
+
   @team:DataDog/ci-app-backend
   Scenario: Update deployment gate returns "Bad Request" response
     Given operation "UpdateDeploymentGate" enabled

features/v2/undo.json

@@ -1335,6 +1335,12 @@
       "type": "unsafe"
     }
   },
+  "GetDeploymentGateRules": {
+    "tag": "Deployment Gates",
+    "undo": {
+      "type": "safe"
+    }
+  },
   "CreateDeploymentRule": {
     "tag": "Deployment Gates",
     "undo": {

private/bdd_runner/src/support/scenarios_model_mapping.ts

@@ -5407,6 +5407,13 @@ export const ScenariosModelMappings: { [key: string]: OperationMapping } = {
     },
     operationResponseType: "DeploymentGateResponse",
   },
+  "DeploymentGatesApi.V2.GetDeploymentGateRules": {
+    gateId: {
+      type: "string",
+      format: "",
+    },
+    operationResponseType: "DeploymentGateRulesResponse",
+  },
   "DeploymentGatesApi.V2.CreateDeploymentRule": {
     gateId: {
       type: "string",