diff --git a/swagger/docs.go b/swagger/docs.go
index 13a7183f5..f5ac9d7e4 100644
--- a/swagger/docs.go
+++ b/swagger/docs.go
@@ -6402,6 +6402,10 @@ const docTemplate = `{
                         "type": "string"
                     }
                 },
+                "context_size": {
+                    "description": "ContextSize is the effective context window in tokens the backend will\nrun with: the configured context_size, or the default when unset. 0 means\nthe value is unknown (e.g. a loose file with no config). Clients can use\nthis to size their context budget for auto-compaction and pruning.",
+                    "type": "integer"
+                },
                 "id": {
                     "type": "string"
                 },
diff --git a/swagger/swagger.json b/swagger/swagger.json
index 211f2769d..4d3bab9a2 100644
--- a/swagger/swagger.json
+++ b/swagger/swagger.json
@@ -6399,6 +6399,10 @@
                         "type": "string"
                     }
                 },
+                "context_size": {
+                    "description": "ContextSize is the effective context window in tokens the backend will\nrun with: the configured context_size, or the default when unset. 0 means\nthe value is unknown (e.g. a loose file with no config). Clients can use\nthis to size their context budget for auto-compaction and pruning.",
+                    "type": "integer"
+                },
                 "id": {
                     "type": "string"
                 },
diff --git a/swagger/swagger.yaml b/swagger/swagger.yaml
index 727a94f44..87fa171fc 100644
--- a/swagger/swagger.yaml
+++ b/swagger/swagger.yaml
@@ -1621,6 +1621,13 @@ definitions:
         items:
           type: string
         type: array
+      context_size:
+        description: |-
+          ContextSize is the effective context window in tokens the backend will
+          run with: the configured context_size, or the default when unset. 0 means
+          the value is unknown (e.g. a loose file with no config). Clients can use
+          this to size their context budget for auto-compaction and pruning.
+        type: integer
       id:
         type: string
       input_modalities: