improve hf_to_nvfp4_safetensors

nvfp4gguf/quant.py

@@ -319,6 +319,9 @@ class GgufLearnedNVFP4:
                 if self._settled:
                     log.info("    Loss reached %g. Stopping early.", float(self.target_loss))
                     return True
+                if limit > 0 and self._learning_rate_floored() and worse_loss_counter >= limit:
+                    log.info("    Loss stalled at lr-min (%d steps). Stopping early.", worse_loss_counter)
+                    return True
                 return super()._check_early_stop(current_loss, curr_lr, worse_loss_counter)
 
             def _compute_svd_components(self, W_float32, verbose: bool = True):