dankclaw: switch frank-default-large spec to DSpark sidecar draft (magnitudedev Qwen3.8-27B-DSpark Q8_0, n_max 7)

scripts/frank-default-large.env

@@ -12,17 +12,21 @@ PORT=7770
 # ~70GB headroom, so 2x262k quantized KV fits. Verify at startup.
 CTX_SIZE=524288
 PARALLEL=2
-# Spec: 3-layer chain, chosen by the user 2026-08-14 (aesthetic/short-term
-# experiment): draft-mtp first, then ngram-mod, then ngram-map-k4v as
-# fallbacks.  On real prose this benches ~equal to draft-mtp alone
-# (10.4 vs ~10 t/s @16k) - the ngram layers only pay off on self-similar text.
-# Bundled MTP drafter; llama.cpp auto-detects it (b10411+).  DRAFT_FILE empty.
-# n_max=5 is the realistic-text peak (n4 12.5, n6 10.6, n10 8.6).
-# Occasional slow rounds possible when fallbacks misfire; revert to
-# draft-mtp (alone) if the assistant reports stalls.
-SPEC_TYPE=draft-mtp,ngram-mod,ngram-map-k4v
-DRAFT_FILE=
-SPEC_DRAFT_N_MAX=5
+# Spec: DSpark sidecar draft (magnitudedev/Qwen3.8-27B-DSpark-GGUF Q8_0,
+# 1.36B, block_size 7, Markov confidence head).  Switched from bundled-MTP
+# 2026-08-15 at the user's request.  DSpark is the semi-autoregressive
+# extension of DFlash (DeepSeek, arXiv 2607.05147): parallel diffusion
+# backbone + sequential Markov head + confidence-scheduled verification.
+# n_max clamps to the trained block_size 7 (server warning if set higher).
+# DSpark extends DFlash (which had a shared-draft-context premature-EOS bug)
+# but adds per-sequence Markov/confidence machinery; parallel safety on this
+# box is still pending the two-16k-prompt test 2026-08-15. Revert to
+# bundled-MTP or set PARALLEL=1 if the parallel test fails.
+# DRAFT_FILE names the sidecar GGUF in MODEL_DIR (downloaded 2026-08-15,
+# sha256 b007a76b2ce57c1a3ecf36046543aebf60a763861624647d653f16d336c781d2).
+SPEC_TYPE=draft-dspark
+DRAFT_FILE=Qwen3.8-27B-DSpark-Q8_0.gguf
+SPEC_DRAFT_N_MAX=7
 SPEC_DRAFT_P_MIN=
 SPEC_NGRAM_MOD_N_MIN=48
 SPEC_NGRAM_MOD_N_MAX=64