The session usage collapsed duplicate query strings across turns while the
price was per turn, so two turns asking the same question paid two fees yet
reported web_search_requests 1. Sum each turn's grounding requests so the
counter matches the bill; duplicates within one turn still collapse.
A guardrail that rewrites text and hands back tool_use arguments that are
not a JSON object used to leave the text rewrite applied when the request
was rejected, so failure logging saw a half-rewritten request. Every
rejection now happens before any write to system or messages.
The router clamps a negative request_retry_count found in request metadata before counting a failure, and the proxy strips a client-supplied request_retry_count with the other router-reserved metadata fields. The rust OCR lifecycle test that trips the per-request cap now plants request_retry_count instead of attempted_retries, which the cap no longer reads since the previous commit
num_retries_per_request has always capped the retries of one request with its fallback hops included. #40930 started reading the per-hop attempted_retries counter instead, and every fallback hop restarts that counter at zero, so a request could spend a fresh retry budget on each hop and the legacy fallback cap test started seeing the hop run.
Router.log_retry now also keeps request_retry_count on the request metadata, incremented on every retry and fallback hop and never truncated the way previous_models is, and max_retries_per_request_hit reads that count. The flat retry records, the litellm_metadata coverage and caps above four from #40930 stay as they are, and the legacy test goes back to its previous_models == 0 assertion.
httpx.Headers.items() comma-joins repeated header names, so the rebuilt
response iterates multi_items() and keeps every value, matching what the
raw openai client exposes on e.response.headers
The streaming bridge restored the namespace before deciding whether a tool call was a custom tool, so a namespaced function sharing a short name with a nested custom tool streamed back as a custom_tool_call. Classify on the raw chat tool name first, the way the non-streaming path already does.
The guardrail merge only stripped the namespace prefix and grammar suffix from the ends of the edited description, so a guardrail appending text after the grammar block left the block in the member description and the chat conversion appended it a second time. Strip the first occurrence of each instead.
The proxy edge test file no longer carries any test of this change, and
the remaining diff was the scoped format gate reflowing the whole file to
the 120 limit, so it goes back to the merge base bytes
