chore(router): document the breadcrumb write-back and ratchet lint budgets

basedpyright-code-budget.json

@@ -3,7 +3,7 @@
     "limit": 14074
   },
   "reportArgumentType": {
-    "limit": 2215
+    "limit": 2214
   },
   "reportAssignmentType": {
     "limit": 319
@@ -42,7 +42,7 @@
     "limit": 12
   },
   "reportIndexIssue": {
-    "limit": 25
+    "limit": 24
   },
   "reportInvalidTypeForm": {
     "limit": 34
@@ -57,7 +57,7 @@
     "limit": 5601
   },
   "reportMissingTypeArgument": {
-    "limit": 15290
+    "limit": 15289
   },
   "reportMissingTypeStubs": {
     "limit": 40
@@ -105,7 +105,7 @@
     "limit": 109
   },
   "reportUnknownMemberType": {
-    "limit": 38332
+    "limit": 38328
   },
   "reportUnknownParameterType": {
     "limit": 19625

litellm/router.py

@@ -8073,7 +8073,8 @@ class Router:
             if isinstance(earlier_breadcrumbs, (list, tuple))
             else ()
         )
-        kwargs[_metadata_var]["previous_models"] = (*kept_breadcrumbs, mask_credentials_in_payload(previous_model))
+        breadcrumbs: Final = (*kept_breadcrumbs, mask_credentials_in_payload(previous_model))
+        kwargs[_metadata_var]["previous_models"] = breadcrumbs  # rebind-ok: the logging object already holds this dict
         return kwargs
 
     def _update_usage(self, deployment_id: str, parent_otel_span: Span | None) -> int:

ruff-strict-budget.json

@@ -144,7 +144,7 @@
     "limit": 1
   },
   "PLR1704": {
-    "limit": 3
+    "limit": 2
   },
   "PLR1714": {
     "limit": 253
@@ -240,13 +240,13 @@
     "limit": 96
   },
   "TRY201": {
-    "limit": 403
+    "limit": 402
   },
   "TRY203": {
-    "limit": 111
+    "limit": 110
   },
   "TRY300": {
-    "limit": 854
+    "limit": 853
   },
   "UP028": {
     "limit": 2

type-discipline-budget.json

@@ -1,9 +1,9 @@
 {
   "LIT001": {
-    "limit": 22334
+    "limit": 22333
   },
   "LIT002": {
-    "limit": 26763
+    "limit": 26760
   },
   "LIT003": {
     "limit": 261
@@ -30,7 +30,7 @@
     "limit": 16480
   },
   "LIT011": {
-    "limit": 5520
+    "limit": 5518
   },
   "LIT012": {
     "limit": 4489