diff --git a/tools/repair_preclaim_rebind_attempt.py b/tools/repair_preclaim_rebind_attempt.py
index e7983b7..b9d0b62 100644
--- a/tools/repair_preclaim_rebind_attempt.py
+++ b/tools/repair_preclaim_rebind_attempt.py
@@ -21,9 +21,7 @@ def backup(path: pathlib.Path) -> pathlib.Path:
     return out
 
 def main() -> int:
-    ap = argparse.ArgumentParser(
-        description="Allow CAS execution rebind for a never-claimed QUEUED task at attempt=0."
-    )
+    ap = argparse.ArgumentParser(description="Allow pre-claim execution rebind at attempt=0.")
     ap.add_argument("--rebind", required=True)
     args = ap.parse_args()
 
@@ -32,45 +30,30 @@ def main() -> int:
         die(f"missing rebind source: {path}")
 
     text = path.read_text(encoding="utf-8")
-
-    old = (
-        '            or not isinstance(attempt, int)\n'
-        '            or isinstance(attempt, bool)\n'
-        '            or attempt < 1\n'
-        '        ):\n'
-        '            raise ExecutionRebindError("EXECUTION_REBIND_INTEGER_INVALID", 400)\n'
-    )
-    new = (
-        '            or not isinstance(attempt, int)\n'
-        '            or isinstance(attempt, bool)\n'
-        '            or attempt < 0\n'
-        '        ):\n'
-        '            raise ExecutionRebindError("EXECUTION_REBIND_INTEGER_INVALID", 400	\n'
-    )
+    old = "            or attempt < 1\n"
+    new = "            or attempt < 0\n"
 
     if new in text:
-        print("OK already patched: pre-claim attempt=0 rebind")
+        print("OK already patched: pre-claim attempt=0")
     else:
         count = text.count(old)
         if count != 1:
-            die(f"expected exactly one attempt validation block, found {count}")
+            die(f"expected exactly one attempt<1 guard, found {count}")
         b = backup(path)
-        text = text.replace(old, new, 1)
-        path.write_text(text, encoding="utf-8")
-        print(f"PATCHED pre-claim attempt=0 rebind; backup={b}")
+        path.write_text(text.replace(old, new, 1), encoding="utf-8")
+        print(f"PATCHED pre-claim attempt=0; backup={b}")
 
     ast.parse(path.read_text(encoding="utf-8"), filename=str(path))
 
     current = path.read_text(encoding="utf-8")
-    required_markers = (
-        'or attempt < 0',
-        'EXECUTION_REBIND_NON_FAST_FORWARD_DENY',
-        'old_expected_branch_oid',
-        'new_expected_branch_oid',
-    )
-    missing = [m for m in required_markers if m not in current]
-    if missing:
-        die("required marker missing: " + ",".join(missing))
+    for marker in (
+        "or attempt < 0",
+        "EXECUTION_REBIND_NON_FAST_FORWARD_DENY",
+        "old_expected_branch_oid",
+        "new_expected_branch_oid",
+    ):
+        if marker not in current:
+            die(f"required marker missing: {marker}")
 
     print(f"OK syntax: {path}")
     print("RESULT: PRECLAIM_REBIND_PATCH_OK")