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* fix(router): stream anthropic messages lifecycle frames live when no fallback can take over The /v1/messages streaming wrapper buffered message_start and content_block_start until the first content_block_delta and dropped pings behind buffered frames unconditionally, even for requests no fallback could ever recover. With adaptive thinking on Bedrock or Vertex the client saw no bytes for the whole thinking pass and hit read timeouts. Buffering now applies only while a fallback can still take over (generic or refusal chain resolving), and a ping is always forwarded live since it carries no lifecycle and keeps the connection alive. Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> * fix(router): mirror every dispatcher fallback path in the anthropic stream gate Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> * fix(router): skip already-tried order levels in the anthropic stream gate Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> * fix(router): keep a transport-split ping behind buffered lifecycle frames instead of forwarding its head live Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> * chore(router): credit the #39566 branch this fix supersedes Co-authored-by: Radu Swigler <radu.porumba@gmail.com> Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> --------- Co-authored-by: mateo <mateo@berri.ai> Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> Co-authored-by: yassin <yassin@berri.ai> Co-authored-by: Radu Swigler <radu.porumba@gmail.com> |
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