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..6d090878eb 100644
--- a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
@@ -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..915fd2fef6 100644
--- a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
@@ -107857,6 +107857,12 @@ 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..457ee7b3f1 100644
--- a/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.json
@@ -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..d93f8e9d7f 100644
--- a/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.2026-03-10.deref.yaml
@@ -107362,6 +107362,12 @@ 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..82cd76cbdf 100644
--- a/descriptions/ghec/dereferenced/ghec.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.deref.json
@@ -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..aeaf6bdb84 100644
--- a/descriptions/ghec/dereferenced/ghec.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.deref.yaml
@@ -108591,6 +108591,12 @@ 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..6dfcf04b07 100644
--- a/descriptions/ghec/ghec.2022-11-28.json
+++ b/descriptions/ghec/ghec.2022-11-28.json
@@ -81316,6 +81316,9 @@
           },
           {
             "$ref": "#/components/parameters/page"
+          },
+          {
+            "$ref": "#/components/parameters/issue-timeline-exclude"
           }
         ],
         "responses": {
@@ -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..f79e3bfdd5 100644
--- a/descriptions/ghec/ghec.2022-11-28.yaml
+++ b/descriptions/ghec/ghec.2022-11-28.yaml
@@ -59617,6 +59617,7 @@ 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
@@ -277094,6 +277095,13 @@ 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/ghec/ghec.2026-03-10.json b/descriptions/ghec/ghec.2026-03-10.json
index 709c7f27a5..7c9aeec625 100644
--- a/descriptions/ghec/ghec.2026-03-10.json
+++ b/descriptions/ghec/ghec.2026-03-10.json
@@ -81215,6 +81215,{"code":"deadline_exceeded","msg":"operation timed out"}