MiniMax models (id contains "minimax") were in the variants() exclusion
list, so M3 exposed no reasoning control on any route despite supporting
the Anthropic `thinking` field (type: adaptive | disabled).
Remove minimax from the exclusion list and add instant/thinking variants,
mirroring the glm/kimi/qwen toggle added in #8484:
- @ai-sdk/anthropic (direct provider): map to native
thinking:{type:"disabled"} / thinking:{type:"adaptive"}
- @kilocode/kilo-gateway + @openrouter/ai-sdk-provider: reuse the
reasoning:{enabled} shape, translated by kiloProviderOptions.
Replace the obsolete "minimax returns empty object" test with coverage
for the direct-anthropic and kilo-gateway routes.
kapelame
c6ead9137e