open-webui/backend
Classic298 b91a558c9d
fix: stop forwarding empty tools arrays from the Anthropic Messages endpoint (#31343)
Anthropic clients such as Claude Code send "tools": [] on text-only requests like prompt-hook evaluation. The Anthropic Messages endpoint carried that empty array into the converted OpenAI request, and vLLM and the OpenAI API reject it with HTTP 400, so those requests failed while normal chats with tools kept working. A "tools": null body crashed the converter with a 500.

The converter now only emits tools when the list is non-empty, and only emits tool_choice when tools were emitted. Dropping tools alone is not enough: the same backends also reject tool_choice without tools, so a request sending an empty tool list plus a tool_choice would still fail.

Requests with real tools are converted exactly as before. Verified end to end against a mock backend enforcing vLLM's validation: empty, null and tool_choice-only requests went from 400/500 to 200 with end_turn, streaming included.

Fixes #31341
2026-09-27 23:11:45 +04:00
..
data refac: mv backend files to /open_webui dir 2024-09-04 16:54:48 +02:00
open_webui fix: stop forwarding empty tools arrays from the Anthropic Messages endpoint (#31343) 2026-09-27 23:11:45 +04:00
.dockerignore fix: litellm config issue 2024-02-24 22:35:11 -08:00
.gitignore refac 2024-09-06 04:59:20 +02:00
dev.sh perf: allow disabling websocket per-message-deflate (#28613) 2026-08-24 18:46:07 -04:00
requirements-slim.txt chore: bump pillow and aiohttp (#31339) 2026-09-27 23:11:34 +04:00
requirements.txt chore: bump pillow and aiohttp (#31339) 2026-09-27 23:11:34 +04:00
start.sh refac 2026-09-06 16:48:30 -04:00
start_windows.bat chore: drop nltk, unused at the pinned versions (#29725) 2026-09-06 16:39:05 -04:00