diff --git a/python/spec-kit/src/dfo_spec_kit/registry/codes.json b/python/spec-kit/src/dfo_spec_kit/registry/codes.json
index 42fce0e..12f73b8 100644
--- a/python/spec-kit/src/dfo_spec_kit/registry/codes.json
+++ b/python/spec-kit/src/dfo_spec_kit/registry/codes.json
@@ -283,6 +283,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 501
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 501
         }
       ],
       "lifecycle": "active"
@@ -1194,6 +1199,11 @@
           "endpoint": "datasets.definition",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
@@ -1215,6 +1225,11 @@
           "endpoint": "datasets.definition",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
@@ -1644,6 +1659,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 500
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 500
         }
       ],
       "lifecycle": "active"
@@ -2594,6 +2614,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
@@ -3269,6 +3294,16 @@
           "endpoint": "datasets.description",
           "channel": "problem_details",
           "http_status": 400
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 400
+        },
+        {
+          "endpoint": "datasets.snapshot",
+          "channel": "problem_details",
+          "http_status": 400
         }
       ],
       "lifecycle": "active"
@@ -3584,6 +3619,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
diff --git a/registries/codes.json b/registries/codes.json
index 42fce0e..12f73b8 100644
--- a/registries/codes.json
+++ b/registries/codes.json
@@ -283,6 +283,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 501
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 501
         }
       ],
       "lifecycle": "active"
@@ -1194,6 +1199,11 @@
           "endpoint": "datasets.definition",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
@@ -1215,6 +1225,11 @@
           "endpoint": "datasets.definition",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
@@ -1644,6 +1659,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 500
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 500
         }
       ],
       "lifecycle": "active"
@@ -2594,6 +2614,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
@@ -3269,6 +3294,16 @@
           "endpoint": "datasets.description",
           "channel": "problem_details",
           "http_status": 400
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 400
+        },
+        {
+          "endpoint": "datasets.snapshot",
+          "channel": "problem_details",
+          "http_status": 400
         }
       ],
       "lifecycle": "active"
@@ -3584,6 +3619,11 @@
           "endpoint": "datasets.refresh",
           "channel": "problem_details",
           "http_status": 422
+        },
+        {
+          "endpoint": "datasets.files",
+          "channel": "problem_details",
+          "http_status": 422
         }
       ],
       "lifecycle": "active"
diff --git a/schemas/registry/README.md b/schemas/registry/README.md
index 6a4fb60..64825ab 100644
--- a/schemas/registry/README.md
+++ b/schemas/registry/README.md
@@ -59,7 +59,7 @@ Retiring a door is a schema change, reviewed as one: dropping a value from `code
 
 - **`endpoint`** lists the Search endpoints `search.resolve` (`POST /api/search/resolve`) and `search.options` (`POST /api/search/options`).
 
-  The Datasets endpoints are `datasets.register` (`POST /api/datasets/register`), `datasets.mint` (`POST /api/datasets`), `datasets.definition` (`GET /api/datasets/{id}`), `datasets.options` (`GET /api/datasets/{id}/options`, the write-free preview door), `datasets.members` (`POST /api/datasets/{id}/members`, the write-free member read), `datasets.snapshot` (`GET /api/datasets/{id}/{content_version}`), `datasets.files` (`GET /api/datasets/{id}/{content_version}/files/{digest}`, which answers a stored artifact with a 302 redirect to its download link), `datasets.description` (`GET /api/datasets/{id}/{content_version}/description`, a stored version's description, for a `spec_` id with a `cv_` version or an `ops_` id with an `ocv_` version, and `GET .../description/values`, which pages one dimension's values), `datasets.observations` (`GET /api/datasets/{id}/{content_version}/observations`, a stored version's observations), `datasets.pin` (`POST /api/datasets/{id}/{content_version}/pin`), `datasets.publish` (`POST /api/datasets/frames/publish`, the door an analysis service uses to publish an already-computed frame under its own identity pair), `datasets.recipe` (`PUT` and `GET /api/datasets/frames/{spec_id}/{content_version}/recipe`, the recorded computation behind a published frame, and `GET /api/datasets/recipes/replays/{replay_key}`, the frame stored under a replay key), `datasets.refresh` (`POST /api/datasets/frames/refresh`, which rebuilds a dataset frame's rendering on current data), and `datasets.operations` (`GET /api/datasets/operations/{operation_id}`).
+  The Datasets endpoints are `datasets.register` (`POST /api/datasets/register`), `datasets.mint` (`POST /api/datasets`), `datasets.definition` (`GET /api/datasets/{id}`), `datasets.options` (`GET /api/datasets/{id}/options`, the write-free preview door), `datasets.members` (`POST /api/datasets/{id}/members`, the write-free member read), `datasets.snapshot` (`GET /api/datasets/{id}/{content_version}`, and `GET /api/datasets/{id}/versions`, which pages a dataset's servable versions), `datasets.files` (`GET /api/datasets/{id}/{content_version}/files/{digest}`, which answers a stored artifact with a 302 redirect to its download link, and `GET /api/datasets/{id}/{content_version}/file`, which selects a stored version's file by format, bundle and layout, renders it when it is missing, and answers the same redirect), `datasets.description` (`GET /api/datasets/{id}/{content_version}/description`, a stored version's description, for a `spec_` id with a `cv_` version or an `ops_` id with an `ocv_` version, and `GET .../description/values`, which pages one dimension's values), `datasets.observations` (`GET /api/datasets/{id}/{content_version}/observations`, a stored version's observations), `datasets.pin` (`POST /api/datasets/{id}/{content_version}/pin`), `datasets.publish` (`POST /api/datasets/frames/publish`, the door an analysis service uses to publish an already-computed frame under its own identity pair), `datasets.recipe` (`PUT` and `GET /api/datasets/frames/{spec_id}/{content_version}/recipe`, the recorded computation behind a published frame, and `GET /api/datasets/recipes/replays/{replay_key}`, the frame stored under a replay key), `datasets.refresh` (`POST /api/datasets/frames/refresh`, which rebuilds a dataset frame's rendering on current data), and `datasets.operations` (`GET /api/datasets/operations/{operation_id}`).
 
   The Presentation endpoints are `presentation.write` (`POST /api/presentation/components`, `PATCH /api/presentation/components/{component_id}`) and `presentation.render` (`POST /api/presentation/components/{component_id}/revisions/{revision}/render` and `GET .../render/data`, which draw a stored revision on a named target frame and mint no revision). Search's and Datasets' `schema`, `capabilities`, and `healthz` routes and Presentation's read routes carry no permanent codes.