diff --git a/client-sdks/stainless/openapi.yml b/client-sdks/stainless/openapi.yml
index bbae4d01a..ff86e30e1 100644
--- a/client-sdks/stainless/openapi.yml
+++ b/client-sdks/stainless/openapi.yml
@@ -1079,11 +1079,6 @@ paths:
         description: 'Path parameter: model_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -1096,6 +1091,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Models
       summary: Unregister Model
@@ -1294,11 +1291,6 @@ paths:
               $ref: '#/components/schemas/UpdatePromptRequest'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           $ref: '#/components/responses/BadRequest400'
           description: Bad Request
@@ -1311,6 +1303,8 @@ paths:
         default:
           $ref: '#/components/responses/DefaultError'
           description: Default Response
+        '204':
+          description: Successful Response
       tags:
       - Prompts
       summary: Delete Prompt
@@ -1793,11 +1787,6 @@ paths:
       operationId: list_scoring_functions_v1_scoring_functions_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -1810,6 +1799,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Scoring Functions
       summary: Register Scoring Function
@@ -1857,11 +1848,6 @@ paths:
         description: 'Path parameter: scoring_fn_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -1874,6 +1860,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Scoring Functions
       summary: Unregister Scoring Function
@@ -2044,11 +2032,6 @@ paths:
         description: 'Path parameter: identifier'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2061,6 +2044,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Shields
       summary: Unregister Shield
@@ -2185,11 +2170,6 @@ paths:
       operationId: list_tool_groups_v1_toolgroups_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2202,6 +2182,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Tool Groups
       summary: Register Tool Group
@@ -2249,11 +2231,6 @@ paths:
         description: 'Path parameter: toolgroup_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2266,6 +2243,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Tool Groups
       summary: Unregister Toolgroup
@@ -2350,11 +2329,6 @@ paths:
   /v1/vector-io/insert:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2367,6 +2341,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Vector Io
       summary: Insert Chunks
@@ -3179,11 +3155,6 @@ paths:
   /v1beta/datasetio/append-rows/{dataset_id}:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3196,6 +3167,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Datasetio
       summary: Append Rows
@@ -3365,11 +3338,6 @@ paths:
         description: 'Path parameter: dataset_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3382,6 +3350,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Datasets
       summary: Unregister Dataset
@@ -3423,11 +3393,6 @@ paths:
       operationId: list_benchmarks_v1alpha_eval_benchmarks_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3440,6 +3405,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Benchmarks
       summary: Register Benchmark
@@ -3487,11 +3454,6 @@ paths:
         description: 'Path parameter: benchmark_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3504,6 +3466,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Benchmarks
       summary: Unregister Benchmark
@@ -3636,11 +3600,6 @@ paths:
         description: 'Path parameter: job_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3653,6 +3612,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Eval
       summary: Job Cancel
@@ -3778,11 +3739,6 @@ paths:
   /v1alpha/post-training/job/cancel:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3795,6 +3751,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Post Training
       summary: Cancel Training Job
diff --git a/docs/static/deprecated-llama-stack-spec.yaml b/docs/static/deprecated-llama-stack-spec.yaml
index 5454874db..3bc06d7d7 100644
--- a/docs/static/deprecated-llama-stack-spec.yaml
+++ b/docs/static/deprecated-llama-stack-spec.yaml
@@ -112,11 +112,6 @@ paths:
         description: 'Path parameter: model_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -129,6 +124,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Models
       summary: Unregister Model
@@ -173,11 +170,6 @@ paths:
       operationId: list_scoring_functions_v1_scoring_functions_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -190,6 +182,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Scoring Functions
       summary: Register Scoring Function
@@ -237,11 +231,6 @@ paths:
         description: 'Path parameter: scoring_fn_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -254,6 +243,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Scoring Functions
       summary: Unregister Scoring Function
@@ -360,11 +351,6 @@ paths:
         description: 'Path parameter: identifier'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -377,6 +363,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Shields
       summary: Unregister Shield
@@ -418,11 +406,6 @@ paths:
       operationId: list_tool_groups_v1_toolgroups_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -435,6 +418,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Tool Groups
       summary: Register Tool Group
@@ -482,11 +467,6 @@ paths:
         description: 'Path parameter: toolgroup_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -499,6 +479,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Tool Groups
       summary: Unregister Toolgroup
@@ -605,11 +587,6 @@ paths:
         description: 'Path parameter: dataset_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -622,6 +599,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Datasets
       summary: Unregister Dataset
@@ -663,11 +642,6 @@ paths:
       operationId: list_benchmarks_v1alpha_eval_benchmarks_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -680,6 +654,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Benchmarks
       summary: Register Benchmark
@@ -727,11 +703,6 @@ paths:
         description: 'Path parameter: benchmark_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -744,6 +715,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Benchmarks
       summary: Unregister Benchmark
diff --git a/docs/static/experimental-llama-stack-spec.yaml b/docs/static/experimental-llama-stack-spec.yaml
index aaafc3ce2..2b36ebf47 100644
--- a/docs/static/experimental-llama-stack-spec.yaml
+++ b/docs/static/experimental-llama-stack-spec.yaml
@@ -16,11 +16,6 @@ paths:
   /v1beta/datasetio/append-rows/{dataset_id}:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -33,6 +28,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Datasetio
       summary: Append Rows
@@ -346,11 +343,6 @@ paths:
         description: 'Path parameter: job_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -363,6 +355,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Eval
       summary: Job Cancel
@@ -488,11 +482,6 @@ paths:
   /v1alpha/post-training/job/cancel:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -505,6 +494,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Post Training
       summary: Cancel Training Job
diff --git a/docs/static/llama-stack-spec.yaml b/docs/static/llama-stack-spec.yaml
index 24f43ab7d..a12ac342f 100644
--- a/docs/static/llama-stack-spec.yaml
+++ b/docs/static/llama-stack-spec.yaml
@@ -1222,11 +1222,6 @@ paths:
               $ref: '#/components/schemas/UpdatePromptRequest'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           $ref: '#/components/responses/BadRequest400'
           description: Bad Request
@@ -1239,6 +1234,8 @@ paths:
         default:
           $ref: '#/components/responses/DefaultError'
           description: Default Response
+        '204':
+          description: Successful Response
       tags:
       - Prompts
       summary: Delete Prompt
@@ -2088,11 +2085,6 @@ paths:
   /v1/vector-io/insert:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2105,6 +2097,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Vector Io
       summary: Insert Chunks
diff --git a/docs/static/stainless-llama-stack-spec.yaml b/docs/static/stainless-llama-stack-spec.yaml
index bbae4d01a..ff86e30e1 100644
--- a/docs/static/stainless-llama-stack-spec.yaml
+++ b/docs/static/stainless-llama-stack-spec.yaml
@@ -1079,11 +1079,6 @@ paths:
         description: 'Path parameter: model_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -1096,6 +1091,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Models
       summary: Unregister Model
@@ -1294,11 +1291,6 @@ paths:
               $ref: '#/components/schemas/UpdatePromptRequest'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           $ref: '#/components/responses/BadRequest400'
           description: Bad Request
@@ -1311,6 +1303,8 @@ paths:
         default:
           $ref: '#/components/responses/DefaultError'
           description: Default Response
+        '204':
+          description: Successful Response
       tags:
       - Prompts
       summary: Delete Prompt
@@ -1793,11 +1787,6 @@ paths:
       operationId: list_scoring_functions_v1_scoring_functions_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -1810,6 +1799,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Scoring Functions
       summary: Register Scoring Function
@@ -1857,11 +1848,6 @@ paths:
         description: 'Path parameter: scoring_fn_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -1874,6 +1860,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Scoring Functions
       summary: Unregister Scoring Function
@@ -2044,11 +2032,6 @@ paths:
         description: 'Path parameter: identifier'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2061,6 +2044,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Shields
       summary: Unregister Shield
@@ -2185,11 +2170,6 @@ paths:
       operationId: list_tool_groups_v1_toolgroups_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2202,6 +2182,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Tool Groups
       summary: Register Tool Group
@@ -2249,11 +2231,6 @@ paths:
         description: 'Path parameter: toolgroup_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2266,6 +2243,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Tool Groups
       summary: Unregister Toolgroup
@@ -2350,11 +2329,6 @@ paths:
   /v1/vector-io/insert:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -2367,6 +2341,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Vector Io
       summary: Insert Chunks
@@ -3179,11 +3155,6 @@ paths:
   /v1beta/datasetio/append-rows/{dataset_id}:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3196,6 +3167,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Datasetio
       summary: Append Rows
@@ -3365,11 +3338,6 @@ paths:
         description: 'Path parameter: dataset_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3382,6 +3350,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Datasets
       summary: Unregister Dataset
@@ -3423,11 +3393,6 @@ paths:
       operationId: list_benchmarks_v1alpha_eval_benchmarks_get
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3440,6 +3405,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Benchmarks
       summary: Register Benchmark
@@ -3487,11 +3454,6 @@ paths:
         description: 'Path parameter: benchmark_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3504,6 +3466,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Benchmarks
       summary: Unregister Benchmark
@@ -3636,11 +3600,6 @@ paths:
         description: 'Path parameter: job_id'
     delete:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3653,6 +3612,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Eval
       summary: Job Cancel
@@ -3778,11 +3739,6 @@ paths:
   /v1alpha/post-training/job/cancel:
     post:
       responses:
-        '200':
-          description: Successful Response
-          content:
-            application/json:
-              schema: {}
         '400':
           description: Bad Request
           $ref: '#/components/responses/BadRequest400'
@@ -3795,6 +3751,8 @@ paths:
         default:
           description: Default Response
           $ref: '#/components/responses/DefaultError'
+        '204':
+          description: Successful Response
       tags:
       - Post Training
       summary: Cancel Training Job
diff --git a/scripts/openapi_generator/main.py b/scripts/openapi_generator/main.py
index e402d4d73..e881ff726 100755
--- a/scripts/openapi_generator/main.py
+++ b/scripts/openapi_generator/main.py
@@ -62,6 +62,7 @@ def generate_openapi_spec(output_dir: str) -> dict[str, Any]:
 
     # Clean descriptions in schema definitions by removing docstring metadata
     openapi_schema = schema_transforms._clean_schema_descriptions(openapi_schema)
+    openapi_schema = schema_transforms._normalize_empty_responses(openapi_schema)
 
     # Remove query parameters from POST/PUT/PATCH endpoints that have a request body
     # FastAPI sometimes infers parameters as query params even when they should be in the request body
diff --git a/scripts/openapi_generator/schema_transforms.py b/scripts/openapi_generator/schema_transforms.py
index bda5decb8..5821c99d5 100644
--- a/scripts/openapi_generator/schema_transforms.py
+++ b/scripts/openapi_generator/schema_transforms.py
@@ -51,6 +51,33 @@ def _fix_ref_references(openapi_schema: dict[str, Any]) -> dict[str, Any]:
     return openapi_schema
 
 
+def _normalize_empty_responses(openapi_schema: dict[str, Any]) -> dict[str, Any]:
+    """Convert empty 200 responses into 204 No Content."""
+
+    for path_item in openapi_schema.get("paths", {}).values():
+        if not isinstance(path_item, dict):
+            continue
+        for method in list(path_item.keys()):
+            operation = path_item.get(method)
+            if not isinstance(operation, dict):
+                continue
+            responses = operation.get("responses")
+            if not isinstance(responses, dict):
+                continue
+            response_200 = responses.get("200") or responses.get(200)
+            if response_200 is None:
+                continue
+            content = response_200.get("content")
+            if content and any(
+                isinstance(media, dict) and media.get("schema") not in ({}, None) for media in content.values()
+            ):
+                continue
+            responses.pop("200", None)
+            responses.pop(200, None)
+            responses["204"] = {"description": response_200.get("description", "No Content")}
+    return openapi_schema
+
+
 def _eliminate_defs_section(openapi_schema: dict[str, Any]) -> dict[str, Any]:
     """
     Eliminate $defs section entirely by moving all definitions to components/schemas.