diff --git a/descriptions/api.github.com/api.github.com.2022-11-28.json b/descriptions/api.github.com/api.github.com.2022-11-28.json
index 71e601edb5..c3d17b8682 100644
--- a/descriptions/api.github.com/api.github.com.2022-11-28.json
+++ b/descriptions/api.github.com/api.github.com.2022-11-28.json
@@ -65914,6 +65914,9 @@
           },
           {
             "$ref": "#/components/parameters/page"
+          },
+          {
+            "$ref": "#/components/parameters/issue-timeline-exclude"
           }
         ],
         "responses": {
@@ -338427,6 +338430,14 @@
           "type": "integer"
         }
       },
+      "issue-timeline-exclude": {
+        "name": "exclude",
+        "in": "query",
+        "description": "A comma-separated list of timeline event names to exclude from the response.",
+        "schema": {
+          "type": "string"
+        }
+      },
       "key-id": {
         "name": "key_id",
         "description": "The unique identifier of the key.",
diff --git a/descriptions/api.github.com/api.github.com.2022-11-28.yaml b/descriptions/api.github.com/api.github.com.2022-11-28.yaml
index 7756d1ae42..0ecef8e818 100644
--- a/descriptions/api.github.com/api.github.com.2022-11-28.yaml
+++ b/descriptions/api.github.com/api.github.com.2022-11-28.yaml
@@ -48535,6 +48535,7 @@ paths:
       - "$ref": "#/components/parameters/issue-number"
       - "$ref": "#/components/parameters/per-page"
       - "$ref": "#/components/parameters/page"
+      - "$ref": "#/components/parameters/issue-timeline-exclude"
       responses:
         '200':
           description: Response
@@ -257122,6 +257123,13 @@ components:
       required: true
       schema:
         type: integer
+    issue-timeline-exclude:
+      name: exclude
+      in: query
+      description: A comma-separated list of timeline event names to exclude from
+        the response.
+      schema:
+        type: string
     key-id:
       name: key_id
       description: The unique identifier of the key.
diff --git a/descriptions/api.github.com/api.github.com.2026-03-10.json b/descriptions/api.github.com/api.github.com.2026-03-10.json
index d03c02d0d9..bd97df6b85 100644
--- a/descriptions/api.github.com/api.github.com.2026-03-10.json
+++ b/descriptions/api.github.com/api.github.com.2026-03-10.json
@@ -65831,6 +65831,9 @@
           },
           {
             "$ref": "#/components/parameters/page"
+          },
+          {
+            "$ref": "#/components/parameters/issue-timeline-exclude"
           }
         ],
         "responses": {
@@ -337567,6 +337570,14 @@
           "type": "integer"
         }
       },
+      "issue-timeline-exclude": {
+        "name": "exclude",
+        "in": "query",
+        "description": "A comma-separated list of timeline event names to exclude from the response.",
+        "schema": {
+          "type": "string"
+        }
+      },
       "key-id": {
         "name": "key_id",
         "description": "The unique identifier of the key.",
diff --git a/descriptions/api.github.com/api.github.com.2026-03-10.yaml b/descriptions/api.github.com/api.github.com.2026-03-10.yaml
index ea04b6f3b8..99e1b95196 100644
--- a/descriptions/api.github.com/api.github.com.2026-03-10.yaml
+++ b/descriptions/api.github.com/api.github.com.2026-03-10.yaml
@@ -48463,6 +48463,7 @@ paths:
       - "$ref": "#/components/parameters/issue-number"
       - "$ref": "#/components/parameters/per-page"
       - "$ref": "#/components/parameters/page"
+      - "$ref": "#/components/parameters/issue-timeline-exclude"
       responses:
         '200':
           description: Response
@@ -256340,6 +256341,13 @@ components:
       required: true
       schema:
         type: integer
+    issue-timeline-exclude:
+      name: exclude
+      in: query
+      description: A comma-separated list of timeline event names to exclude from
+        the response.
+      schema:
+        type: string
     key-id:
       name: key_id
       description: The unique identifier of the key.
diff --git a/descriptions/api.github.com/api.github.com.json b/descriptions/api.github.com/api.github.com.json
index 5dab390268..3694b0f679 100644
--- a/descriptions/api.github.com/api.github.com.json
+++ b/descriptions/api.github.com/api.github.com.json
@@ -66221,6 +66221,9 @@
           },
           {
             "$ref": "#/components/parameters/page"
+          },
+          {
+            "$ref": "#/components/parameters/issue-timeline-exclude"
           }
         ],
         "responses": {
@@ -340768,6 +340771,14 @@
           "type": "integer"
         }
       },
+      "issue-timeline-exclude": {
+        "name": "exclude",
+        "in": "query",
+        "description": "A comma-separated list of timeline event names to exclude from the response.",
+        "schema": {
+          "type": "string"
+        }
+      },
       "key-id": {
         "name": "key_id",
         "description": "The unique identifier of the key.",
diff --git a/descriptions/api.github.com/api.github.com.yaml b/descriptions/api.github.com/api.github.com.yaml
index c121565d7a..4581c3e44f 100644
--- a/descriptions/api.github.com/api.github.com.yaml
+++ b/descriptions/api.github.com/api.github.com.yaml
@@ -48723,6 +48723,7 @@ paths:
       - "$ref": "#/components/parameters/issue-number"
       - "$ref": "#/components/parameters/per-page"
       - "$ref": "#/components/parameters/page"
+      - "$ref": "#/components/parameters/issue-timeline-exclude"
       responses:
         '200':
           description: Response
@@ -258627,6 +258628,13 @@ components:
       required: true
       schema:
         type: integer
+    issue-timeline-exclude:
+      name: exclude
+      in: query
+      description: A comma-separated list of timeline event names to exclude from
+        the response.
+      schema:
+        type: string
     key-id:
       name: key_id
       description: The unique identifier of the key.
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json
index 6c49077674..c33464ace5 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json
+++ b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json
@@ -485758,6 +485758,14 @@
               "type": "integer",
               "default": 1
             }
+          },
+          {
+            "name": "exclude",
+            "in": "query",
+            "description": "A comma-separated list of timeline event names to exclude from the response.",
+            "schema": {
+              "type": "string"
+            }
           }
         ],
         "responses": {
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml
index b2b7ada050..05ed97b4bf 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml
+++ b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml
@@ -92633,6 +92633,12 @@ paths:
       - *572
       - *17
       - *19
+      - name: exclude
+        in: query
+        description: A comma-separated list of timeline event names to exclude from
+          the response.
+        schema:
+          type: string
       responses:
         '200':
           description: Response
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.json b/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.json
index 935bd10e2f..b0112e286b 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.json
+++ b/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.json
@@ -476326,6 +476326,14 @@
               "type": "integer",
               "default": 1
             }
+          },
+          {
+            "name": "exclude",
+            "in": "query",
+            "description": "A comma-separated list of timeline event names to exclude from the response.",
+            "schema": {
+              "type": "string"
+            }
           }
         ],
         "responses": {
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.yaml b/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.yaml
index b4f321c516..9af8c8edd9 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.yaml
+++ b/descriptions/api.github.com/dereferenced/api.github.com.2026-03-10.deref.yaml
@@ -92149,6 +92149,12 @@ paths:
       - *572
       - *17
       - *19
+      - name: exclude
+        in: query
+        description: A comma-separated list of timeline event names to exclude from
+          the response.
+        schema:
+          type: string
       responses:
         '200':
           description: Response
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.deref.json b/descriptions/api.github.com/dereferenced/api.github.com.deref.json
index c8a430acc0..7608eededd 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.deref.json
+++ b/descriptions/api.github.com/dereferenced/api.github.com.deref.json
@@ -497500,6 +497500,14 @@
               "type": "integer",
               "default": 1
             }
+          },
+          {
+            "name": "exclude",
+            "in": "query",
+            "description": "A comma-separated list of timeline event names to exclude from the response.",
+            "schema": {
+              "type": "string"
+            }
           }
         ],
         "responses": {
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml b/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml
index 83ad9ba0bc..416caa85af 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml
+++ b/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml
@@ -93354,6 +93354,12 @@ paths:
       - *575
       - *17
       - *19
+      - name: exclude
+        in: query
+        description: A comma-separated list of timeline event names to exclude from
+          the response.
+        schema:
+          type: string
       responses:
         '200':
           description: Response
diff --git a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
index 0eff48c2ee..62d1f17842 100644
--- a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
@@ -77777,7 +77777,7 @@
                           },
                           "ai_credit_pool_enabled": {
                             "type": "boolean",
-                            "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                            "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                           },
                           "ai_credit_pool_state": {
                             "type": "object",
@@ -78056,7 +78056,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -78392,7 +78392,7 @@
                     },
                     "ai_credit_pool_enabled": {
                       "type": "boolean",
-                      "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                      "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                     },
                     "ai_credit_pool_state": {
                       "type": "object",
@@ -78633,7 +78633,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -78706,7 +78706,7 @@
                     },
                     "ai_credit_pool_enabled": {
                       "type": "boolean",
-                      "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                      "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                     },
                     "ai_credit_pool_state": {
                       "type": "object",
@@ -550720,6 +550720,14 @@
               "type": "integer",
               "default": 1
             }
+          },
+          {
+            "name": "exclude",
+            "in": "query",
+            "description": "A comma-separated list of timeline event names to exclude from the response.",
+            "schema": {
+              "type": "string"
+            }
           }
         ],
         "responses": {
diff --git a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
index 5230f08a47..668b3c5e9f 100644
--- a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
@@ -29231,8 +29231,13 @@ paths:
                             subscriptions.
                         ai_credit_pool_enabled:
                           type: boolean
-                          description: Whether the cost center draws from the AI credit
-                            pool (capped from member license entitlements).
+                          description: |-
+                            Whether the cost center draws from the AI credit pool.
+
+                            This can only be enabled for cost centers that contain only user or team resources.
+
+                            - `false` — no cap; the cost center draws from the shared enterprise pool.
+                            - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                         ai_credit_pool_state:
                           type: object
                           description: Read-only cap-budget projection for the cost
@@ -29334,8 +29339,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               example-1:
                 summary: Example request to create a cost center
@@ -29529,8 +29537,13 @@ paths:
                       pagination. Only present when pagination is used.
                   ai_credit_pool_enabled:
                     type: boolean
-                    description: Whether the cost center draws from the AI credit
-                      pool (capped from member license entitlements).
+                    description: |-
+                      Whether the cost center draws from the AI credit pool.
+
+                      This can only be enabled for cost centers that contain only user or team resources.
+
+                      - `false` — no cap; the cost center draws from the shared enterprise pool.
+                      - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                   ai_credit_pool_state:
                     type: object
                     description: Read-only cap-budget projection for the cost center.
@@ -29614,8 +29627,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               update-cost-center:
                 summary: Update cost center name example
@@ -29667,8 +29683,13 @@ paths:
                       - name
                   ai_credit_pool_enabled:
                     type: boolean
-                    description: Whether the cost center draws from the AI credit
-                      pool (capped from member license entitlements).
+                    description: |-
+                      Whether the cost center draws from the AI credit pool.
+
+                      This can only be enabled for cost centers that contain only user or team resources.
+
+                      - `false` — no cap; the cost center draws from the shared enterprise pool.
+                      - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                   ai_credit_pool_state:
                     type: object
                     description: Read-only cap-budget projection for the cost center.
@@ -107857,6 +107878,12 @@ paths:
       - *715
       - *17
       - *19
+      - name: exclude
+        in: query
+        description: A comma-separated list of timeline event names to exclude from
+          the response.
+        schema:
+          type: string
       responses:
         '200':
           description: Response
diff --git a/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.json b/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.json
index 35a13a95ee..bc65fe9f45 100644
--- a/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.json
@@ -77636,7 +77636,7 @@
                           },
                           "ai_credit_pool_enabled": {
                             "type": "boolean",
-                            "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                            "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                           },
                           "ai_credit_pool_state": {
                             "type": "object",
@@ -77915,7 +77915,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -78251,7 +78251,7 @@
                     },
                     "ai_credit_pool_enabled": {
                       "type": "boolean",
-                      "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                      "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                     },
                     "ai_credit_pool_state": {
                       "type": "object",
@@ -78492,7 +78492,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -78565,7 +78565,7 @@
                     },
                     "ai_credit_pool_enabled": {
                       "type": "boolean",
-                      "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                      "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                     },
                     "ai_credit_pool_state": {
                       "type": "object",
@@ -541041,6 +541041,14 @@
               "type": "integer",
               "default": 1
             }
+          },
+          {
+            "name": "exclude",
+            "in": "query",
+            "description": "A comma-separated list of timeline event names to exclude from the response.",
+            "schema": {
+              "type": "string"
+            }
           }
         ],
         "responses": {
diff --git a/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.yaml b/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.yaml
index c8dfdc4451..869c31c719 100644
--- a/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.yaml
@@ -29161,8 +29161,13 @@ paths:
                             subscriptions.
                         ai_credit_pool_enabled:
                           type: boolean
-                          description: Whether the cost center draws from the AI credit
-                            pool (capped from member license entitlements).
+                          description: |-
+                            Whether the cost center draws from the AI credit pool.
+
+                            This can only be enabled for cost centers that contain only user or team resources.
+
+                            - `false` — no cap; the cost center draws from the shared enterprise pool.
+                            - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                         ai_credit_pool_state:
                           type: object
                           description: Read-only cap-budget projection for the cost
@@ -29264,8 +29269,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               example-1:
                 summary: Example request to create a cost center
@@ -29459,8 +29467,13 @@ paths:
                       pagination. Only present when pagination is used.
                   ai_credit_pool_enabled:
                     type: boolean
-                    description: Whether the cost center draws from the AI credit
-                      pool (capped from member license entitlements).
+                    description: |-
+                      Whether the cost center draws from the AI credit pool.
+
+                      This can only be enabled for cost centers that contain only user or team resources.
+
+                      - `false` — no cap; the cost center draws from the shared enterprise pool.
+                      - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                   ai_credit_pool_state:
                     type: object
                     description: Read-only cap-budget projection for the cost center.
@@ -29544,8 +29557,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               update-cost-center:
                 summary: Update cost center name example
@@ -29597,8 +29613,13 @@ paths:
                       - name
                   ai_credit_pool_enabled:
                     type: boolean
-                    description: Whether the cost center draws from the AI credit
-                      pool (capped from member license entitlements).
+                    description: |-
+                      Whether the cost center draws from the AI credit pool.
+
+                      This can only be enabled for cost centers that contain only user or team resources.
+
+                      - `false` — no cap; the cost center draws from the shared enterprise pool.
+                      - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                   ai_credit_pool_state:
                     type: object
                     description: Read-only cap-budget projection for the cost center.
@@ -107362,6 +107383,12 @@ paths:
       - *715
       - *17
       - *19
+      - name: exclude
+        in: query
+        description: A comma-separated list of timeline event names to exclude from
+          the response.
+        schema:
+          type: string
       responses:
         '200':
           description: Response
diff --git a/descriptions/ghec/dereferenced/ghec.deref.json b/descriptions/ghec/dereferenced/ghec.deref.json
index dfba5e77b3..da4edea1ec 100644
--- a/descriptions/ghec/dereferenced/ghec.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.deref.json
@@ -78249,7 +78249,7 @@
                           },
                           "ai_credit_pool_enabled": {
                             "type": "boolean",
-                            "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                            "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                           },
                           "ai_credit_pool_state": {
                             "type": "object",
@@ -78528,7 +78528,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -78864,7 +78864,7 @@
                     },
                     "ai_credit_pool_enabled": {
                       "type": "boolean",
-                      "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                      "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                     },
                     "ai_credit_pool_state": {
                       "type": "object",
@@ -79105,7 +79105,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -79178,7 +79178,7 @@
                     },
                     "ai_credit_pool_enabled": {
                       "type": "boolean",
-                      "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                      "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                     },
                     "ai_credit_pool_state": {
                       "type": "object",
@@ -562710,6 +562710,14 @@
               "type": "integer",
               "default": 1
             }
+          },
+          {
+            "name": "exclude",
+            "in": "query",
+            "description": "A comma-separated list of timeline event names to exclude from the response.",
+            "schema": {
+              "type": "string"
+            }
           }
         ],
         "responses": {
diff --git a/descriptions/ghec/dereferenced/ghec.deref.yaml b/descriptions/ghec/dereferenced/ghec.deref.yaml
index 6ac18b5ba1..cd85fbd779 100644
--- a/descriptions/ghec/dereferenced/ghec.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.deref.yaml
@@ -29404,8 +29404,13 @@ paths:
                             subscriptions.
                         ai_credit_pool_enabled:
                           type: boolean
-                          description: Whether the cost center draws from the AI credit
-                            pool (capped from member license entitlements).
+                          description: |-
+                            Whether the cost center draws from the AI credit pool.
+
+                            This can only be enabled for cost centers that contain only user or team resources.
+
+                            - `false` — no cap; the cost center draws from the shared enterprise pool.
+                            - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                         ai_credit_pool_state:
                           type: object
                           description: Read-only cap-budget projection for the cost
@@ -29507,8 +29512,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               example-1:
                 summary: Example request to create a cost center
@@ -29702,8 +29710,13 @@ paths:
                       pagination. Only present when pagination is used.
                   ai_credit_pool_enabled:
                     type: boolean
-                    description: Whether the cost center draws from the AI credit
-                      pool (capped from member license entitlements).
+                    description: |-
+                      Whether the cost center draws from the AI credit pool.
+
+                      This can only be enabled for cost centers that contain only user or team resources.
+
+                      - `false` — no cap; the cost center draws from the shared enterprise pool.
+                      - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                   ai_credit_pool_state:
                     type: object
                     description: Read-only cap-budget projection for the cost center.
@@ -29787,8 +29800,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               update-cost-center:
                 summary: Update cost center name example
@@ -29840,8 +29856,13 @@ paths:
                       - name
                   ai_credit_pool_enabled:
                     type: boolean
-                    description: Whether the cost center draws from the AI credit
-                      pool (capped from member license entitlements).
+                    description: |-
+                      Whether the cost center draws from the AI credit pool.
+
+                      This can only be enabled for cost centers that contain only user or team resources.
+
+                      - `false` — no cap; the cost center draws from the shared enterprise pool.
+                      - `true` — the cost center is capped at an amount derived from its members' license entitlements.
                   ai_credit_pool_state:
                     type: object
                     description: Read-only cap-budget projection for the cost center.
@@ -108591,6 +108612,12 @@ paths:
       - *718
       - *17
       - *19
+      - name: exclude
+        in: query
+        description: A comma-separated list of timeline event names to exclude from
+          the response.
+        schema:
+          type: string
       responses:
         '200':
           description: Response
diff --git a/descriptions/ghec/ghec.2022-11-28.json b/descriptions/ghec/ghec.2022-11-28.json
index 5fa12f1122..413caa0371 100644
--- a/descriptions/ghec/ghec.2022-11-28.json
+++ b/descriptions/ghec/ghec.2022-11-28.json
@@ -19173,7 +19173,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -19453,7 +19453,7 @@
                   },
                   "ai_credit_pool_enabled": {
                     "type": "boolean",
-                    "description": "Whether the cost center draws from the AI credit pool.\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed."
+                    "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                   }
                 }
               },
@@ -81316,6 +81316,9 @@
           },
           {
             "$ref": "#/components/parameters/page"
+          },
+          {
+            "$ref": "#/components/parameters/issue-timeline-exclude"
           }
         ],
         "responses": {
@@ -146585,7 +146588,7 @@
                 },
                 "ai_credit_pool_enabled": {
                   "type": "boolean",
-                  "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+                  "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
                 },
                 "ai_credit_pool_state": {
                   "type": "object",
@@ -146683,7 +146686,7 @@
           },
           "ai_credit_pool_enabled": {
             "type": "boolean",
-            "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+            "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
           },
           "ai_credit_pool_state": {
             "type": "object",
@@ -146754,7 +146757,7 @@
           },
           "ai_credit_pool_enabled": {
             "type": "boolean",
-            "description": "Whether the cost center draws from the AI credit pool (capped from member license entitlements)."
+            "description": "Whether the cost center draws from the AI credit pool.\n\nThis can only be enabled for cost centers that contain only user or team resources.\n\n- `false` — no cap; the cost center draws from the shared enterprise pool.\n- `true` — the cost center is capped at an amount derived from its members' license entitlements."
           },
           "ai_credit_pool_state": {
             "type": "object",
@@ -365815,6 +365818,14 @@
           "type": "integer"
         }
       },
+      "issue-timeline-exclude": {
+        "name": "exclude",
+        "in": "query",
+        "description": "A comma-separated list of timeline event names to exclude from the response.",
+        "schema": {
+          "type": "string"
+        }
+      },
       "key-id": {
         "name": "key_id",
         "description": "The unique identifier of the key.",
diff --git a/descriptions/ghec/ghec.2022-11-28.yaml b/descriptions/ghec/ghec.2022-11-28.yaml
index 47034b5471..a85f53f949 100644
--- a/descriptions/ghec/ghec.2022-11-28.yaml
+++ b/descriptions/ghec/ghec.2022-11-28.yaml
@@ -14202,8 +14202,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               example-1:
                 summary: Example request to create a cost center
@@ -14403,8 +14406,11 @@ paths:
                   type: boolean
                   description: |-
                     Whether the cost center draws from the AI credit pool.
+
+                    This can only be enabled for cost centers that contain only user or team resources.
+
                     - `false` — no cap; the cost center draws from the shared enterprise pool.
-                    - `true` — the cost center is capped at an amount derived from its members' license entitlements. Only User and Team resources are allowed.
+                    - `true` — the cost center is capped at an amount derived from its members' license entitlements.
             examples:
               update-cost-center:
                 summary: Update cost center name example
@@ -59617,6 +59623,7 @@ paths:
       - "$ref": "#/components/parameters/issue-number"
       - "$ref": "#/components/parameters/per-page"
       - "$ref": "#/components/parameters/page"
+      - "$ref": "#/components/parameters/issue-timeline-exclude"
       responses:
         '200':
           description: Response
@@ -107239,8 +107246,13 @@ components:
                   Only present for cost centers linked to Azure subscriptions.
               ai_credit_pool_enabled:
                 type: boolean
-                description: Whether the cost center draws from the AI credit pool
-                  (capped from member license entitlements).
+                description: |-
+                  Whether the cost center draws from the AI credit pool.
+
+                  This can only be enabled for cost centers that contain only user or team resources.
+
+                  - `false` — no cap; the cost center draws from the shared enterprise pool.
+                  - `true` — the cost center is capped at an amount derived from its members' license entitlements.
               ai_credit_pool_state:
                 type: object
                 description: Read-only cap-budget projection for the cost center.
@@ -107315,8 +107327,13 @@ components:
             Only present when pagination is used.
         ai_credit_pool_enabled:
           type: boolean
-          description: Whether the cost center draws from the AI credit pool (capped
-            from member license entitlements).
+          description: |-
+            Whether the cost center draws from the AI credit pool.
+
+            This can only be enabled for cost centers that contain only user or team resources.
+
+            - `false` — no cap; the cost center draws from the shared enterprise pool.
+            - `true` — the cost center is capped at an amount derived from its members' license entitlements.
         ai_credit_pool_state:
           type: object
           description: Read-only cap-budget projection for the cost center. Only present
@@ -107373,8 +107390,13 @@ components:
             - name
         ai_credit_pool_enabled:
           type: boolean
-          description: Whether the cost center draws from the AI credit pool (capped
-            from member license entitlements).
+          description: |-
+            Whether the cost center draws from the AI credit pool.
+
+            This can only be enabled for cost centers that contain only user or team resources.
+
+            - `false` — no cap; the cost center draws from the shared enterprise pool.
+            - `true` — the cost center is capped at an amount derived from its members' license entitlements.
         ai_credit_pool_state:
           type: object
           description: Read-only cap-budget projection for the cost center. Only present
@@ -277094,6 +277116,13 @@ components:
       required: true
       schema:
         type: integer
+    issue-timeline-exclude:
+      name: exclude
+      in: query
+      description: A comma-separat{"code":"deadline_exceeded","msg":"operation timed out"}