v0.38.5
- Fix chat 400 errors on long conversations: bump small-host context from 8K to 16K
- Router: stop preferring small models for chat — higher tier always preferred
- Tighten random model spread window (50→15 points) so weak models are fallbacks, not equal contenders
- Add Qwen3.5-9B router profile (tier 2)
- TODO: context-aware routing, retry-on-400 noted as future work