[probe] loading Qwen/Qwen3.6-27B (torch.bfloat16, sdpa-attn, chunked-score)
[transformers] The fast path is not available because one of the required library is not installed. Falling back to torch implementation. To install follow https://github.com/fla-org/flash-linear-attention#installation and https://github.com/Dao-AILab/causal-conv1d

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[probe] replaced lm_head with Identity (probe discards logits)
[probe] GA layers=16 num_h=24 num_kv=4 head_dim=256
[probe] streaming up to 192 long fineweb docs (min_chars=1310720, scan cap=5000000)...
[probe] scanned 50000 rows, kept 46 (building doc, 975354/1310720 chars)
[probe] scanned 100000 rows, kept 95 (building doc, 169829/1310720 chars)
[probe] scanned 150000 rows, kept 142 (building doc, 636461/1310720 chars)
[probe] scanned 200000 rows, kept 191 (building doc, 146570/1310720 chars)
[probe] got 192 candidates
[transformers] Token indices sequence length is longer than the specified maximum sequence length for this model (298196 > 262144). Running this sequence through the model will result in indexing errors
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[probe] promoted 2 heads to satisfy min_retrieval_per_layer=1: [(3, 23), (63, 9)]
[probe] wrote probe_results/qwen3_6_27b_seq262k.json  retrieval=58/384 = 0.151