V21: COMPLETE PR openai#1855 stack + AWQ-lite + AsymLogit (CRITICAL FIX)

V19c/V20 ran with FUNDAMENTALLY WRONG base config:
  - smear_gate_enabled: False  (PR openai#1855 needs True)
  - sparse_attn_gate_enabled: False  (PR openai#1855 needs True)
  - num_phases: 1  (PR openai#1855 needs 3)
  - compressor: brotli  (PR openai#1855 needs pergroup with lrzip)
  - embed_bits: 8  (PR openai#1855 needs 7)
  - 11+ other hparams default-not-PR1855

Hence V19c/V20 artifacts hit 16.93 MB (over 16 MB cap, INVALID submission)
and TTT recovery was 1-phase only, severely handicapped.

V21 = exact PR openai#1855 README reproduction command env vars + AWQ-lite (PR openai#1908)
+ ASYM_LOGIT_RESCALE=1 (V19 innovation, V19c proved -0.001/-0.002 BPB benefit).

Source: PR openai#1855 README lines 125-145 (codemath3000 official reproduction).

Predicted (seed 42):
  pre-quant: ~1.064  (matches PR openai#1908 1.06384)
  quantized: ~1.072  (matches PR openai#1908 1.07226)
  artifact:  ~15.99 MB  (lrzip pergroup compression + EMBED_BITS=7)
  post-TTT:  ~1.057  (PR openai#1908 1.05957 - 0.002 from AsymLogit)

Win threshold: < 1.06021
Probability: 50-60% real frontier break

Pre-req: apt-get install lrzip on RunPod pod (handled in setup script)

Author: alertcat

records/track_10min_16mb/2026-04-30_V19_PR1908_AsymLogit_WD2/run_v21_full_stack_scout.sh

@@ -0,0 +1,98 @@
+#!/bin/bash
+# V21 = FULL PR #1855 9-hp stack + PR #1908 AWQ-lite + V19 ASYM_LOGIT_RESCALE
+# This is the FIRST version with the COMPLETE PR #1855 reproduction env vars.
+# V18/V19c/V20 all ran with SmearGate=False, SparseAttnGate=False, num_phases=1 -> WRONG BASE.
+# Source: PR #1855 README lines 125-145 (codemath3000's exact reproduction command).
+#
+# Predicted (seed 42, FORCE_STOP_STEP=4945 for direct PR #1908 comparison):
+#   pre-quant val_bpb: ~1.064 (matching PR #1908 1.06384)
+#   quantized val_bpb: ~1.072 (matching PR #1908 1.07226)
+#   artifact size: ~15.99 MB (lrzip pergroup compression)
+#   post-TTT val_bpb: ~1.057 (PR #1908 1.05957 - 0.002 from AsymLogit)
+#   total eval time: ~485s (3-phase TTT slightly slower than 1-phase)
+#
+# Win threshold: < 1.06021
+# Probability of true single-seed win vs frontier: 50-60%
+set -e
+
+cd /workspace/parameter-golf/records/track_10min_16mb/2026-04-30_V19_PR1908_AsymLogit_WD2/
+
+echo "===================================================="
+echo "  V21 scout: FULL PR #1855 stack + AWQ-lite + AsymLogit"
+echo "  Seed 42 + FORCE_STOP_STEP=4945  Start: $(date)"
+echo "===================================================="
+
+# COMPLETE env var set from PR #1855 README + PR #1908 AWQ-lite + V19 ASYM_LOGIT_RESCALE
+ENV_VARS="DATA_DIR=/workspace/caseops_data/datasets/ \
+  DATA_PATH=/workspace/caseops_data/datasets/datasets/fineweb10B_sp8192_lossless_caps_caseops_v1_reserved \
+  TOKENIZER_PATH=/workspace/caseops_data/datasets/tokenizers/fineweb_8192_bpe_lossless_caps_caseops_v1_reserved.model \
+  CASEOPS_ENABLED=1 \
+  VOCAB_SIZE=8192 \
+  ITERATIONS=20000 \
+  MAX_WALLCLOCK_SECONDS=600 \
+  WARMUP_STEPS=20 \
+  WARMDOWN_FRAC=0.85 \
+  BETA2=0.99 \
+  GRAD_CLIP_NORM=0.3 \
+  MIN_LR=0.1 \
+  MATRIX_LR=0.026 \
+  GLOBAL_TTT_MOMENTUM=0.9 \
+  SPARSE_ATTN_GATE_ENABLED=1 \
+  SPARSE_ATTN_GATE_SCALE=0.5 \
+  SMEAR_GATE_ENABLED=1 \
+  GATE_WINDOW=12 \
+  GATED_ATTN_QUANT_GATE=1 \
+  FUSED_CE_ENABLED=1 \
+  EMBED_BITS=7 \
+  MLP_CLIP_SIGMAS=11.5 \
+  ATTN_CLIP_SIGMAS=13.0 \
+  EMBED_CLIP_SIGMAS=14.0 \
+  GPTQ_RESERVE_SECONDS=0.5 \
+  GPTQ_CALIBRATION_BATCHES=16 \
+  COMPRESSOR=pergroup \
+  LQER_ENABLED=1 \
+  LQER_ASYM_ENABLED=1 \
+  LQER_RANK=4 \
+  LQER_FACTOR_BITS=4 \
+  LQER_ASYM_GROUP=64 \
+  LQER_TOP_K=3 \
+  AWQ_LITE_ENABLED=1 \
+  AWQ_LITE_BITS=8 \
+  AWQ_LITE_GROUP_TOP_K=1 \
+  AWQ_LITE_GROUP_SIZE=64 \
+  PHASED_TTT_ENABLED=1 \
+  PHASED_TTT_PREFIX_DOCS=2500 \
+  PHASED_TTT_NUM_PHASES=3 \
+  TTT_CHUNK_SIZE=48 \
+  TTT_BETA2=0.99 \
+  TTT_WEIGHT_DECAY=0.5 \
+  TTT_LORA_RANK=80 \
+  MUON_BACKEND_STEPS=5 \
+  NCCL_NET=Socket \
+  VAL_LOSS_EVERY=0 \
+  ASYM_LOGIT_RESCALE=1 \
+  FORCE_STOP_STEP=4945"
+
+env SEED=42 $ENV_VARS \
+  torchrun --standalone --nproc_per_node=8 train_gpt.py \
+  > /workspace/scout_v21_seed42.log 2>&1
+
+cp final_model.int6.ptz /workspace/v21_seed42_model.int6.ptz 2>/dev/null || true
+cp /workspace/scout_v21_seed42.log /workspace/v21_seed42_FULL.log 2>/dev/null || true
+
+echo ""
+echo "===================================================="
+echo "  V21 scout DONE  $(date)"
+echo "===================================================="
+grep -E "stopping_early|train_time|quantized_ttt_phased|val_bpb|total_eval_time|Total submission|smear_gate_enabled|sparse_attn_gate_enabled|num_phases|compressor" /workspace/scout_v21_seed42.log | tail -20
+echo ""
+echo "DECISION RULE:"
+echo "  PR #1908 reported 3-seed mean: 1.06081"
+echo "  community merge floor:         0.0006 BPB"
+echo "  win threshold:                 < 1.06021"
+echo "  artifact cap:                  < 16,000,000 bytes"
+echo ""
+echo "  if V21 quantized_ttt_phased < 1.058 AND artifact < 16M -> CLEAR WIN, run 3-seed"
+echo "  if V21 quantized_ttt_phased 1.058-1.060 -> WIN, run 3-seed"
+echo "  if artifact > 16M -> SIZE FAIL (debug compressor)"
+echo "  if quantized_ttt_phased > 1.062 -> abandon"