Debugging

CLI-dependent degradation on a quantized 552B MoE: concurrency hammers, a logging proxy that exposed what opencode really sends (nothing — and that was the bug), one reproduced episode of fluent Chinese nonsense in twelve cycles, and the missing generation_config.json that separated an uncapped top_p 1.0 tail from DeepSeek’s official recipe. Plus the reasoning-effort knob that exists as 0-100 in one engine and string levels in another.

A 320B sparse-hybrid MoE serving word salad at temperature 0, a repro whose bugs outlived the bug it hunted, a per-layer bisect that cleared the KDA layers and convicted the sparse full-attention path, and an EXL3/TR3 plus B12X deployment that ends the story with verified 262K-context retrieval at 39 tok/s.