diff --git a/checkpoints/run_checkpoint.py b/checkpoints/run_checkpoint.py
index 789f9a2..525dffc 100644
--- a/checkpoints/run_checkpoint.py
+++ b/checkpoints/run_checkpoint.py
@@ -89,10 +89,12 @@ def assessment(observations: list[dict]) -> tuple[str | None, str | None]:
     facts = "\n".join(f"- {o['indicator']} {o['jurisdiction']} {o.get('labels') or ''}: {o['label']} = "
                       f"{o['value']} {o.get('unit') or ''} (period {o['period']})" for o in ok)
     prompt = (
-        "You assess AI adoption observations for a research checkpoint. Use ONLY the facts below. "
-        "Do not add any number, date or statistic that is not literally in the facts. "
-        "Write 2-4 short bullet points: what the observations say about the pace of AI adoption per "
-        "jurisdiction (US, EU, DE), and which differences stand out. No forecasts.\n\nFacts:\n" + facts)
+        "You assess AI adoption observations for a research checkpoint. Use ONLY the facts below.\n"
+        "Rules: (a) every number you write must appear literally in the facts; (b) do not compute "
+        "differences, ratios, growth rates or percentage points; (c) use '-' bullets, never numbered "
+        "lists; (d) no forecasts.\n"
+        "Write two to four short bullets on what the observations say about AI adoption per "
+        "jurisdiction (US, EU, DE) and which contrasts stand out (describe them in words).\n\nFacts:\n" + facts)
     body = json.dumps({"prompt": prompt, "config": {"temperature": 0.1, "max_tokens": 500}}).encode()
     try:
         req = urllib.request.Request(url + "/execute", data=body, headers={"Content-Type": "application/json"})
@@ -103,6 +105,8 @@ def assessment(observations: list[dict]) -> tuple[str | None, str | None]:
     allowed = _numbers(facts)
     extra = sorted(n for n in _numbers(text) if n not in allowed and n.replace(",", ".") not in allowed)
     if extra:
+        if os.environ.get("CHECKPOINT_DEBUG"):
+            print("REJECTED ASSESSMENT:\n" + text, file=sys.stderr)
         return None, f"assessment rejected: numbers not in fetched data: {extra[:8]}"
     return text, None