fix(router): mid-stream fallback 400s on models without assistant prefill (Claude Sonnet 4.6+) - #30242

fix(router): mid-stream fallback 400s on models without assistant prefill (Claude Sonnet 4.6+)#30242

cwang-otto wants to merge 8 commits into

BerriAI:litellm_internal_stagingBerriAI/litellm:litellm_internal_stagingfrom

cwang-otto:fix/midstream-fallback-prefill-claude46cwang-otto/litellm:fix/midstream-fallback-prefill-claude46Copy head branch name to clipboard