support deepseek and kimi

[jxnding]

What problem does this solve?
Describe the use case or pain point.

Proposed solution
What you'd like to see. Be specific about scope.

Alternatives considered
Other approaches you thought about and why this one is better.

Scope estimate

• Small (single file, <100 lines)
• Medium (2-3 files, new module)
• Large (new subsystem, multiple modules)

Would you like to implement this?
Yes / No / Need guidance