tenseleyflow/sway / edd5a03

+            raw_std = statistics.pstdev(raws) if len(raws) > 1 else 0.0

+            # F02 (Audit 03) — detect the degenerate case (``runs: 1``

+            # or every seed producing the *exact* same raw) as a first-

+            # class property of the stats dict. The previous code hid

+            # this via ``max(std, 1e-6)`` which collided with

+            # :data:``_zscore.MIN_STD`` and let the z-score path fire

+            # on a std that had been synthetically lifted from ``0.0``

+            # — the path that produced the ``+290,766σ`` observation in

+            # the audit. A multi-seed run with genuinely small variance

+            # (e.g. 5e-7 on a low-noise dummy) is NOT degenerate; we

+            # keep the 1e-6 floor for that case so valid-but-tight

+            # calibrations still z-score. ``z_score`` inspects both the

+            # ``degenerate`` flag and the ``std < MIN_STD`` threshold.

+            degenerate = len(raws) <= 1 or raw_std == 0.0

+                "std": max(raw_std, 1e-6),

+                "degenerate": 1.0 if degenerate else 0.0,