fix(quant): prove window token identity, gate the tap on progress, kill the runner's orphan race

Adversarial review of the campaign pipeline. Correctness: rechunk-kld-corpus.py wrote
each window as text and asserted only lengths, so a KLD reference could score a
different token sequence than the corpus holds — every window is now re-encoded and
the tool refuses on mismatch; make-calib-corpus.py no longer crashes on a .json that
is not a content-keyed JSONL, and its KLD cursor advanced by 2 per fragment (half the
pool unused). Silent waste: calib-push.py now aborts when the tap sealed nothing or
no prompt was accepted, instead of re-pushing 10M tokens per round; div-by-zero gone,
served model id parameterised. Races: run-qwen38-bf16.sh restore() removes the rig
container before starting production (today's orphan held the GPUs while the service
reported active), the calib tap dir is proven writable, the score ro-guard resolves
paths; convert-qwen38-w5nl64.sh refuses a missing --arm value, an existing
qwen38-convert-<arm> container, and a zero-exit convert that wrote no artifact.
stack-qwen38-official-fp8.py: bare asserts in verify() (skipped under -O) and a
non-128-lane PLE HD that only warned are hard failures. Speed: fragment token counts
computed once, KLD scored positions accumulated instead of a second full re-encode.
Tests: 576 ok / 0 fail.

scripts/calib-push.py

@@ -29,6 +29,7 @@ Usage: calib-push.py [--port 7770] [--parallel 64] [--container arbench]
 import argparse
 import concurrent.futures
 import json
+import os
 import subprocess
 import sys
 import time
@@ -49,9 +50,9 @@ def tap_done(container):
     return DONE_MARK in (out.stdout + out.stderr)
 
 
-def push_one(url, prompt):
+def push_one(url, prompt, model):
     body = json.dumps({
-        "model": "frank-archon",
+        "model": model,
         "prompt": prompt,
         "max_tokens": 1,
         "temperature": 0,
@@ -68,11 +69,33 @@ def push_one(url, prompt):
         return False
 
 
+def tap_bytes(path):
+    """Bytes the tap has sealed so far; 0 when the directory is absent.
+
+    A tap whose directory is wrong, full or read-only stops writing while the
+    engine keeps answering 200 — the driver then re-pushes the whole corpus for
+    every round it is allowed and the loss is invisible until the hours are gone.
+    """
+    total = 0
+    try:
+        for root, _, files in os.walk(path):
+            for f in files:
+                try:
+                    total += os.path.getsize(os.path.join(root, f))
+                except OSError:
+                    pass
+    except OSError:
+        return 0
+    return total
+
+
 def main():
     ap = argparse.ArgumentParser()
     ap.add_argument("--port", type=int, default=7770)
     ap.add_argument("--parallel", type=int, default=64)
     ap.add_argument("--container", default="arbench")
+    ap.add_argument("--model", default="frank-archon")
+    ap.add_argument("--tap-dir", default="/home/dank/campaign/qwen38-w5nl64/calib")
     ap.add_argument("--corpus", default="/home/dank/corpora/out/calib.jsonl")
     ap.add_argument("--max-rounds", type=int, default=4)
     a = ap.parse_args()
@@ -84,22 +107,37 @@ def main():
             line = line.strip()
             if line:
                 prompts.append(json.loads(line)["prompt"])
-    print(f"corpus: {len(prompts)} prompts", flush=True)
+    chars = sum(len(p) for p in prompts)
+    print(f"corpus: {len(prompts)} prompts, ~{chars // 4} tokens (chars/4)",
+          flush=True)
+    if not prompts:
+        print("REFUSED: the corpus holds no prompts", flush=True)
+        sys.exit(2)
 
     for rnd in range(1, a.max_rounds + 1):
         if tap_done(a.container):
             break
+        before = tap_bytes(a.tap_dir)
         t0 = time.time()
         ok = 0
         with concurrent.futures.ThreadPoolExecutor(a.parallel) as ex:
-            for good in ex.map(lambda p: push_one(url, p), prompts):
+            for good in ex.map(lambda p: push_one(url, p, a.model), prompts):
                 ok += 1 if good else 0
-        dt = time.time() - t0
+        dt = max(time.time() - t0, 1e-9)
         print(f"round {rnd}: {ok}/{len(prompts)} ok in {dt:.0f}s "
-              f"({sum(len(p) for p in prompts)/4/dt:.0f} chars/s est)",
-              flush=True)
+              f"({chars / 4 / dt:.0f} tokens/s est)", flush=True)
+        if ok == 0:
+            print("FAIL: not one prompt was accepted; fix the engine or the argv "
+                  "before spending another round", flush=True)
+            sys.exit(1)
         if tap_done(a.container):
             break
+        after = tap_bytes(a.tap_dir)
+        if after <= before:
+            print(f"FAIL: the tap at {a.tap_dir} sealed nothing this round "
+                  f"({before} B before, {after} B after) — the engine is serving "
+                  "without recording (wrong dir, full disk, read-only mount)", flush=True)
+            sys.exit(1)
     else:
         print("max rounds exhausted, tap not done", flush=True)
         sys.exit(1)