fix(auxiliary): pass original base_url to _maybe_wrap_anthropic in compression path - #20116
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crayfish-ai wants to merge 1 commit into
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fix(auxiliary): pass original base_url to _maybe_wrap_anthropic in compression path#20116crayfish-ai wants to merge 1 commit into
crayfish-ai wants to merge 1 commit into
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…tection Wrap-if-needed checks _endpoint_speaks_anthropic_messages() which looks for the /anthropic suffix. But _to_openai_base_url() already rewrote /anthropic → /v1 before this point, causing the anthropic wrapper to never trigger for MiniMax and similar custom endpoints that require it. Pass explicit_base_url (original) instead of custom_base (rewritten).
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This was referenced May 7, 2026
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Bug
_wrap_if_needed checks _endpoint_speaks_anthropic_messages() which looks for the /anthropic suffix. But _to_openai_base_url() already rewrites /anthropic → /v1 before this point, causing the anthropic wrapper to never trigger for custom endpoints (e.g. MiniMax) that require it.
Fix
Pass explicit_base_url (original, e.g. /anthropic) instead of custom_base (already rewritten to /v1) to _wrap_if_needed, so the anthropic transport detection works correctly.
Testing
Context compression now succeeds with MiniMax and similar custom endpoints that require AnthropicMessages format.
Related
Upstream #17467 fixed a similar issue in _resolve_custom_runtime() but missed the _resolve_auto() Step 1 path used during compression.