diff --git a/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/gold_report.json b/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/gold_report.json
new file mode 100644
index 0000000..8fef0b6
--- /dev/null
+++ b/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/gold_report.json
@@ -0,0 +1,93 @@
+{
+  "per_class": {
+    "loop_all": {
+      "tp": 112,
+      "fp": 15,
+      "fn": 5,
+      "precision": 0.8818897637795275,
+      "recall": 0.9572649572649573,
+      "f1": 0.9180327868852459,
+      "mean_mask_iou": 0.8879999668937923,
+      "n_matched": 112
+    },
+    "pin": {
+      "tp": 84,
+      "fp": 6,
+      "fn": 5,
+      "precision": 0.9333333333333333,
+      "recall": 0.9438202247191011,
+      "f1": 0.9385474860335196,
+      "mean_mask_iou": 0.9283102184111982,
+      "n_matched": 84
+    },
+    "crystal": {
+      "tp": 16,
+      "fp": 14,
+      "fn": 17,
+      "precision": 0.5333333333333333,
+      "recall": 0.48484848484848486,
+      "f1": 0.507936507936508,
+      "mean_mask_iou": 0.792008917551766,
+      "n_matched": 16
+    },
+    "loop_face": {
+      "tp": 85,
+      "fp": 14,
+      "fn": 20,
+      "precision": 0.8585858585858586,
+      "recall": 0.8095238095238095,
+      "f1": 0.8333333333333333,
+      "mean_mask_iou": 0.8686498409776393,
+      "n_matched": 85
+    },
+    "ice": {
+      "tp": 4,
+      "fp": 7,
+      "fn": 28,
+      "precision": 0.36363636363636365,
+      "recall": 0.125,
+      "f1": 0.18604651162790697,
+      "mean_mask_iou": 0.8357625526706466,
+      "n_matched": 4
+    },
+    "needle": {
+      "tp": 0,
+      "fp": 0,
+      "fn": 1,
+      "precision": 0.0,
+      "recall": 0.0,
+      "f1": 0.0,
+      "mean_mask_iou": 0.0,
+      "n_matched": 0
+    }
+  },
+  "overall": {
+    "tp": 301,
+    "fp": 56,
+    "fn": 76,
+    "precision": 0.8431372549019608,
+    "recall": 0.7984084880636605,
+    "f1": 0.8201634877384196,
+    "mean_mask_iou": 0.8879883189809155,
+    "n_matched": 301
+  },
+  "dataset": {
+    "gold_images": 120,
+    "pred_images": 120,
+    "missing_predictions": 0,
+    "iou_threshold": 0.5
+  },
+  "gate": {
+    "baseline": "/home/jungfrau/AareLC_train/models/registry/yolo26n-seg-alc-v1-2026-09-28/gold_report.json",
+    "f1_delta": -0.0003,
+    "mask_iou_delta": -0.0013,
+    "mask_score": 0.709,
+    "mask_score_baseline": 0.7103,
+    "matched_only_iou_delta": 0.0072,
+    "class_f1_delta": {
+      "loop_all": -0.0063,
+      "pin": 0.0196
+    },
+    "pass": false
+  }
+}
diff --git a/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/metadata.json b/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/metadata.json
new file mode 100644
index 0000000..a4c7c09
--- /dev/null
+++ b/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/metadata.json
@@ -0,0 +1,52 @@
+{
+  "model_id": "yolo26n-seg-alc-v1-mask1-2026-09-28",
+  "family": "yolo26n",
+  "task": "segmentation",
+  "training_date": "2026-09-28",
+  "run": "2026-09-28_alc-v1-mask1",
+  "dataset": "dataset/2026-09-28_alc-v1",
+  "base_weights": "/home/jungfrau/AareLC/models/yolo26n-seg.pt",
+  "hyperparams": {
+    "epochs": 400,
+    "patience": 50,
+    "imgsz": 640,
+    "batch": 16,
+    "device": "0",
+    "overlap_mask": false,
+    "scale": 0.7,
+    "translate": 0.15,
+    "mosaic": 0.5,
+    "close_mosaic": 10,
+    "fliplr": 0.5,
+    "flipud": 0.3,
+    "shear": 5.0,
+    "perspective": 0.0,
+    "mask_ratio": 1
+  },
+  "export_formats": [
+    "pt"
+  ],
+  "metrics": {
+    "tp": 301,
+    "fp": 56,
+    "fn": 76,
+    "precision": 0.8431372549019608,
+    "recall": 0.7984084880636605,
+    "f1": 0.8201634877384196,
+    "mean_mask_iou": 0.8879883189809155,
+    "n_matched": 301
+  },
+  "gate": {
+    "baseline": "/home/jungfrau/AareLC_train/models/registry/yolo26n-seg-alc-v1-2026-09-28/gold_report.json",
+    "f1_delta": -0.0003,
+    "mask_iou_delta": -0.0013,
+    "mask_score": 0.709,
+    "mask_score_baseline": 0.7103,
+    "matched_only_iou_delta": 0.0072,
+    "class_f1_delta": {
+      "loop_all": -0.0063,
+      "pin": 0.0196
+    },
+    "pass": false
+  }
+}
diff --git a/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/weights.pt b/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/weights.pt
new file mode 100644
index 0000000..13f7eba
--- /dev/null
+++ b/models/registry/yolo26n-seg-alc-v1-mask1-2026-09-28/weights.pt
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0e460cec6ecc441eb2b8be4ea1338151927e40b083be870074b72d7ee3d89cd9
+size 6566301
diff --git a/runs/2026-09-28_alc-v1-mask1/metrics.json b/runs/2026-09-28_alc-v1-mask1/metrics.json
new file mode 100644
index 0000000..6a044b1
--- /dev/null
+++ b/runs/2026-09-28_alc-v1-mask1/metrics.json
@@ -0,0 +1,38 @@
+{
+  "overall": {
+    "tp": 301,
+    "fp": 56,
+    "fn": 76,
+    "precision": 0.8431372549019608,
+    "recall": 0.7984084880636605,
+    "f1": 0.8201634877384196,
+    "mean_mask_iou": 0.8879883189809155,
+    "n_matched": 301
+  },
+  "gate": {
+    "baseline": "/home/jungfrau/AareLC_train/models/registry/yolo26n-seg-alc-v1-2026-09-28/gold_report.json",
+    "f1_delta": -0.0003,
+    "mask_iou_delta": -0.0013,
+    "mask_score": 0.709,
+    "mask_score_baseline": 0.7103,
+    "matched_only_iou_delta": 0.0072,
+    "class_f1_delta": {
+      "loop_all": -0.0063,
+      "pin": 0.0196
+    },
+    "pass": false
+  },
+  "training": {
+    "epochs_run": 155,
+    "precision(B)": 0.64264,
+    "recall(B)": 0.64496,
+    "mAP50(B)": 0.66184,
+    "mAP50-95(B)": 0.49342,
+    "precision(M)": 0.63334,
+    "recall(M)": 0.64059,
+    "mAP50(M)": 0.64876,
+    "mAP50-95(M)": 0.46241
+  },
+  "version": "yolo26n-seg-alc-v1-mask1-2026-09-28",
+  "measured_at": "2026-09-28T23:54:44"
+}
diff --git a/runs/2026-09-28_alc-v1-mask1/run.json b/runs/2026-09-28_alc-v1-mask1/run.json
index bc10336..d551795 100644
--- a/runs/2026-09-28_alc-v1-mask1/run.json
+++ b/runs/2026-09-28_alc-v1-mask1/run.json
@@ -2,18 +2,60 @@
   "id": "2026-09-28_alc-v1-mask1",
   "dataset": "dataset/2026-09-28_alc-v1",
   "base_weights": "/home/jungfrau/AareLC/models/yolo26n-seg.pt",
-  "status": "exported",
+  "status": "gate_failed",
   "created": "2026-09-28T21:30:31",
   "created_by": "jungfrau@mx-spark-01",
-  "hyperparams": {},
-  "version": null,
-  "metrics": {},
+  "hyperparams": {
+    "epochs": 400,
+    "patience": 50,
+    "imgsz": 640,
+    "batch": 16,
+    "device": "0",
+    "overlap_mask": false,
+    "scale": 0.7,
+    "translate": 0.15,
+    "mosaic": 0.5,
+    "close_mosaic": 10,
+    "fliplr": 0.5,
+    "flipud": 0.3,
+    "shear": 5.0,
+    "perspective": 0.0,
+    "mask_ratio": 1
+  },
+  "version": "yolo26n-seg-alc-v1-mask1-2026-09-28",
+  "metrics": {
+    "f1": 0.8201634877384196,
+    "mean_mask_iou": 0.8879883189809155,
+    "gate_pass": false,
+    "baseline": "/home/jungfrau/AareLC_train/models/registry/yolo26n-seg-alc-v1-2026-09-28/gold_report.json",
+    "measured_at": "2026-09-28T23:54:44"
+  },
   "history": [
     {
       "status": "exported",
       "at": "2026-09-28T21:30:31",
       "by": "jungfrau@mx-spark-01",
       "note": "full-resolution masks (mask_ratio=1); same dataset and gold as 2026-09-28_alc-v1"
+    },
+    {
+      "status": "training",
+      "at": "2026-09-28T21:30:31",
+      "by": "jungfrau@mx-spark-01",
+      "note": "train_run.py"
+    },
+    {
+      "status": "measured",
+      "at": "2026-09-28T23:54:44",
+      "by": "jungfrau@mx-spark-01",
+      "note": ""
+    },
+    {
+      "status": "gate_failed",
+      "at": "2026-09-28T23:54:44",
+      "by": "jungfrau@mx-spark-01",
+      "note": "{\"baseline\": \"/home/jungfrau/AareLC_train/models/registry/yolo26n-seg-alc-v1-2026-09-28/gold_report.json\", \"f1_delta\": -0.0003, \"mask_iou_delta\": -0.0013, \"mask_score\": 0.709, \"mask_score_baseline\": 0.7103, \"matched_only_iou_delta\": 0.0072, \"class_f1_delta\": {\"loop_all\": -0.0063, \"pin\": 0.0196}, \"pass\": false}"
     }
-  ]
+  ],
+  "host": "mx-spark-01",
+  "started": "2026-09-28T21:30:31"
 }
diff --git a/runs/clean_gold_comparison.json b/runs/clean_gold_comparison.json
new file mode 100644
index 0000000..ddd94b0
--- /dev/null
+++ b/runs/clean_gold_comparison.json
@@ -0,0 +1,285 @@
+{
+  "clean_frames": 66,
+  "reports": {
+    "beamline yolo26n-seg-overlap-false-2026-04-12": {
+      "per_class": {
+        "loop_all": {
+          "tp": 43,
+          "fp": 14,
+          "fn": 21,
+          "precision": 0.7543859649122807,
+          "recall": 0.671875,
+          "f1": 0.7107438016528924,
+          "mean_mask_iou": 0.8603647813074378,
+          "n_matched": 43
+        },
+        "pin": {
+          "tp": 48,
+          "fp": 7,
+          "fn": 11,
+          "precision": 0.8727272727272727,
+          "recall": 0.8135593220338984,
+          "f1": 0.8421052631578948,
+          "mean_mask_iou": 0.9478639299321778,
+          "n_matched": 48
+        },
+        "crystal": {
+          "tp": 2,
+          "fp": 15,
+          "fn": 5,
+          "precision": 0.11764705882352941,
+          "recall": 0.2857142857142857,
+          "f1": 0.16666666666666666,
+          "mean_mask_iou": 0.8492457223853397,
+          "n_matched": 2
+        },
+        "loop_face": {
+          "tp": 30,
+          "fp": 12,
+          "fn": 23,
+          "precision": 0.7142857142857143,
+          "recall": 0.5660377358490566,
+          "f1": 0.631578947368421,
+          "mean_mask_iou": 0.8979746795878049,
+          "n_matched": 30
+        },
+        "ice": {
+          "tp": 1,
+          "fp": 4,
+          "fn": 1,
+          "precision": 0.2,
+          "recall": 0.5,
+          "f1": 0.28571428571428575,
+          "mean_mask_iou": 0.8931750741839762,
+          "n_matched": 1
+        }
+      },
+      "overall": {
+        "tp": 124,
+        "fp": 52,
+        "fn": 61,
+        "precision": 0.7045454545454546,
+        "recall": 0.6702702702702703,
+        "f1": 0.6869806094182825,
+        "mean_mask_iou": 0.9034198478996224,
+        "n_matched": 124
+      },
+      "dataset": {
+        "gold_images": 66,
+        "pred_images": 120,
+        "missing_predictions": 0,
+        "iou_threshold": 0.5
+      }
+    },
+    "2026-09-28_alc-v1-humanonly": {
+      "per_class": {
+        "loop_all": {
+          "tp": 60,
+          "fp": 5,
+          "fn": 4,
+          "precision": 0.9230769230769231,
+          "recall": 0.9375,
+          "f1": 0.9302325581395349,
+          "mean_mask_iou": 0.8627592241834525,
+          "n_matched": 60
+        },
+        "pin": {
+          "tp": 55,
+          "fp": 3,
+          "fn": 4,
+          "precision": 0.9482758620689655,
+          "recall": 0.9322033898305084,
+          "f1": 0.94017094017094,
+          "mean_mask_iou": 0.9206098193697871,
+          "n_matched": 55
+        },
+        "crystal": {
+          "tp": 4,
+          "fp": 9,
+          "fn": 3,
+          "precision": 0.3076923076923077,
+          "recall": 0.5714285714285714,
+          "f1": 0.4,
+          "mean_mask_iou": 0.7422849246805395,
+          "n_matched": 4
+        },
+        "loop_face": {
+          "tp": 40,
+          "fp": 14,
+          "fn": 13,
+          "precision": 0.7407407407407407,
+          "recall": 0.7547169811320755,
+          "f1": 0.7476635514018692,
+          "mean_mask_iou": 0.8552237297527754,
+          "n_matched": 40
+        },
+        "ice": {
+          "tp": 1,
+          "fp": 0,
+          "fn": 1,
+          "precision": 1.0,
+          "recall": 0.5,
+          "f1": 0.6666666666666666,
+          "mean_mask_iou": 0.8895522388059701,
+          "n_matched": 1
+        }
+      },
+      "overall": {
+        "tp": 160,
+        "fp": 31,
+        "fn": 25,
+        "precision": 0.837696335078534,
+        "recall": 0.8648648648648649,
+        "f1": 0.851063829787234,
+        "mean_mask_iou": 0.8779170915249036,
+        "n_matched": 160
+      },
+      "dataset": {
+        "gold_images": 66,
+        "pred_images": 120,
+        "missing_predictions": 0,
+        "iou_threshold": 0.5
+      }
+    },
+    "2026-09-28_alc-v1-noflip": {
+      "per_class": {
+        "loop_all": {
+          "tp": 59,
+          "fp": 8,
+          "fn": 5,
+          "precision": 0.8805970149253731,
+          "recall": 0.921875,
+          "f1": 0.9007633587786259,
+          "mean_mask_iou": 0.8707171878261458,
+          "n_matched": 59
+        },
+        "pin": {
+          "tp": 55,
+          "fp": 4,
+          "fn": 4,
+          "precision": 0.9322033898305084,
+          "recall": 0.9322033898305084,
+          "f1": 0.9322033898305084,
+          "mean_mask_iou": 0.9138805674783179,
+          "n_matched": 55
+        },
+        "crystal": {
+          "tp": 4,
+          "fp": 6,
+          "fn": 3,
+          "precision": 0.4,
+          "recall": 0.5714285714285714,
+          "f1": 0.47058823529411764,
+          "mean_mask_iou": 0.7713352240501519,
+          "n_matched": 4
+        },
+        "loop_face": {
+          "tp": 40,
+          "fp": 14,
+          "fn": 13,
+          "precision": 0.7407407407407407,
+          "recall": 0.7547169811320755,
+          "f1": 0.7476635514018692,
+          "mean_mask_iou": 0.8528345417122416,
+          "n_matched": 40
+        },
+        "ice": {
+          "tp": 1,
+          "fp": 0,
+          "fn": 1,
+          "precision": 1.0,
+          "recall": 0.5,
+          "f1": 0.6666666666666666,
+          "mean_mask_iou": 0.9156626506024096,
+          "n_matched": 1
+        }
+      },
+      "overall": {
+        "tp": 159,
+        "fp": 32,
+        "fn": 26,
+        "precision": 0.8324607329842932,
+        "recall": 0.8594594594594595,
+        "f1": 0.8457446808510638,
+        "mean_mask_iou": 0.8789316384172502,
+        "n_matched": 159
+      },
+      "dataset": {
+        "gold_images": 66,
+        "pred_images": 120,
+        "missing_predictions": 0,
+        "iou_threshold": 0.5
+      }
+    },
+    "2026-09-28_alc-v1": {
+      "per_class": {
+        "loop_all": {
+          "tp": 58,
+          "fp": 7,
+          "fn": 6,
+          "precision": 0.8923076923076924,
+          "recall": 0.90625,
+          "f1": 0.8992248062015504,
+          "mean_mask_iou": 0.873542286431727,
+          "n_matched": 58
+        },
+        "pin": {
+          "tp": 56,
+          "fp": 7,
+          "fn": 3,
+          "precision": 0.8888888888888888,
+          "recall": 0.9491525423728814,
+          "f1": 0.9180327868852458,
+          "mean_mask_iou": 0.913231968211653,
+          "n_matched": 56
+        },
+        "crystal": {
+          "tp": 4,
+          "fp": 2,
+          "fn": 3,
+          "precision": 0.6666666666666666,
+          "recall": 0.5714285714285714,
+          "f1": 0.6153846153846153,
+          "mean_mask_iou": 0.7662505101273234,
+          "n_matched": 4
+        },
+        "loop_face": {
+          "tp": 38,
+          "fp": 9,
+          "fn": 15,
+          "precision": 0.8085106382978723,
+          "recall": 0.7169811320754716,
+          "f1": 0.76,
+          "mean_mask_iou": 0.8637306298851367,
+          "n_matched": 38
+        },
+        "ice": {
+          "tp": 1,
+          "fp": 1,
+          "fn": 1,
+          "precision": 0.5,
+          "recall": 0.5,
+          "f1": 0.5,
+          "mean_mask_iou": 0.8808139534883721,
+          "n_matched": 1
+        }
+      },
+      "overall": {
+        "tp": 157,
+        "fp": 26,
+        "fn": 28,
+        "precision": 0.8579234972677595,
+        "recall": 0.8486486486486486,
+        "f1": 0.8532608695652173,
+        "mean_mask_iou": 0.8826370876593987,
+        "n_matched": 157
+      },
+      "dataset": {
+        "gold_images": 66,
+        "pred_images": 120,
+        "missing_predictions": 0,
+        "iou_threshold": 0.5
+      }
+    }
+  }
+}
\ No newline at end of file