2 files changed, 159 insertions, 0 deletions
diff --git a/ep_run/baseline_configs/fw135m_matched_bp.json b/ep_run/baseline_configs/fw135m_matched_bp.json
new file mode 100644
index 0000000..0e22686
--- /dev/null
+++ b/ep_run/baseline_configs/fw135m_matched_bp.json
@@ -0,0 +1,42 @@
+{
+  "source_of_truth": "docs/BASELINE_SPEC.md",
+  "purpose": "First approximately 2x BP twin rung after the completed 72M FineWeb model",
+  "changed_from_72m": {
+    "width": "512 -> 768",
+    "heads": "8 -> 12",
+    "parameters": "72,114,688 -> 135,303,936",
+    "training_updates": "440,443 updates to preserve approximately 20 tokens/parameter"
+  },
+  "held_fixed_from_72m": {
+    "layers": 12,
+    "head_dim": 64,
+    "context": 256,
+    "global_sequence_batch": 24,
+    "data": "fineweb_edu",
+    "vocab": 32768,
+    "architecture": "local OLMo2-style",
+    "optimizer": "Muon on hidden matrices plus AdamW on remaining parameters",
+    "muon_lr": 0.02,
+    "adam_side_lr_center": 0.001,
+    "weight_decay": 0.1,
+    "warmup_steps": 500,
+    "schedule": "cosine to 0.1 of peak",
+    "precision": "bf16 autocast with fp32 parameters/states"
+  },
+  "locked_run": {
+    "tag": "fw135m_bp",
+    "layers": 12,
+    "width": 768,
+    "heads": 12,
+    "head_dim": 64,
+    "context": 256,
+    "batch": 24,
+    "parameters": 135303936,
+    "target_tokens_20N": 2706078720,
+    "trainer_steps_argument": 440442,
+    "actual_updates": 440443,
+    "actual_tokens": 2706081792
+  },
+  "bp_lr_sweep_smallest_rung_only": [0.0007, 0.001, 0.0014],
+  "minimum_seeds_before_reporting": 2
+}
diff --git a/ep_run/fw135m_baseline.py b/ep_run/fw135m_baseline.py
new file mode 100644
index 0000000..ddcc5c0
--- /dev/null
+++ b/ep_run/fw135m_baseline.py
@@ -0,0 +1,117 @@
+"""Dry-run-by-default launcher for BASELINE_SPEC.md's first BP twin rung."""
+from __future__ import annotations
+
+import argparse
+import subprocess
+import sys
+
+
+VOCAB = 32768
+LAYERS = 12
+WIDTH = 768
+HEADS = 12
+CONTEXT = 256
+BATCH = 24
+PARAMETERS = 135303936
+FULL_STEPS_ARG = 440442  # casc_bp_train.py loops inclusively: 440,443 updates
+LR_SWEEP = ("7e-4", "1e-3", "1.4e-3")
+
+
+def parameter_count(vocab=VOCAB, layers=LAYERS, width=WIDTH):
+    hidden = ((8 * width // 3) + 63) // 64 * 64
+    return 2 * vocab * width + width + layers * (
+        4 * width * width + 3 * width * hidden + 4 * width
+    )
+
+
+def command(tag, lr, steps, warmup, seed, wandb_project):
+    return [
+        sys.executable,
+        "casc_bp_train.py",
+        "--tag",
+        tag,
+        "--L",
+        str(LAYERS),
+        "--C",
+        str(WIDTH),
+        "--H",
+        str(HEADS),
+        "--T",
+        str(CONTEXT),
+        "--B",
+        str(BATCH),
+        "--steps",
+        str(steps),
+        "--lr",
+        lr,
+        "--warmup",
+        str(warmup),
+        "--amp",
+        "--olmo2",
+        "--wd",
+        "0.1",
+        "--opt",
+        "muon",
+        "--muon_lr",
+        "0.02",
+        "--cosine",
+        "--lr_min_ratio",
+        "0.1",
+        "--data",
+        "fineweb_edu",
+        "--seed",
+        str(seed),
+        "--save_every",
+        "5000",
+        "--log",
+        "100",
+        "--wandb",
+        wandb_project,
+        "--wandb_run",
+        tag if wandb_project else "",
+    ]
+
+
+def main():
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--mode", choices=("smoke", "sweep", "full"), default="smoke")
+    ap.add_argument("--execute", action="store_true", help="run commands; default only prints")
+    ap.add_argument("--lr", default="1e-3", help="selected LR for --mode full")
+    ap.add_argument("--seed", type=int, default=1)
+    ap.add_argument("--sweep_steps", type=int, default=FULL_STEPS_ARG)
+    ap.add_argument("--wandb_project", default="")
+    args = ap.parse_args()
+
+    count = parameter_count()
+    if count != PARAMETERS:
+        raise RuntimeError(f"parameter formula returned {count}, expected {PARAMETERS}")
+
+    if args.mode == "smoke":
+        runs = [(f"fw135m_bp_smoke_s{args.seed}", args.lr, 400, 50)]
+    elif args.mode == "sweep":
+        runs = [
+            (
+                f"fw135m_bp_lr{lr.replace('-', 'm').replace('.', 'p')}_s{args.seed}",
+                lr,
+                args.sweep_steps,
+                500,
+            )
+            for lr in LR_SWEEP
+        ]
+    else:
+        runs = [(f"fw135m_bp_s{args.seed}", args.lr, FULL_STEPS_ARG, 500)]
+
+    print(
+        f"# L{LAYERS} C{WIDTH} H{HEADS} T{CONTEXT} B{BATCH} "
+        f"| {PARAMETERS:,} params | target 20N={20 * PARAMETERS:,} tokens",
+        flush=True,
+    )
+    for tag, lr, steps, warmup in runs:
+        cmd = command(tag, lr, steps, warmup, args.seed, args.wandb_project)
+        print(" ".join(f'"{item}"' if item == "" else item for item in cmd), flush=True)
+        if args.execute:
+            subprocess.run(cmd, check=True)
+
+
+if __name__ == "__main__":
+    main()