Design doc for the T6 training stack: Goal / Module Layout / Key Design
Decisions (AdamW math + decoupled WD, LR schedule, global-norm grad clip with
batch averaging, checkpoint format, data pipeline + xserv tokenizer reuse,
sampler) / 验证方法 (AdamW parity, checkpoint round-trip, real training, host
unit tests).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
