diff --git "a/metadata.jsonl" "b/metadata.jsonl"
--- "a/metadata.jsonl"
+++ "b/metadata.jsonl"
@@ -1,50 +1,93 @@
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-{"sample_id": "broad_extreme_pool:cb_0000789", "chart_id": "broad_extreme_pool:chart_0000789", "chart_type": "area", "chart_group": "core10", "image_path": "images/broad_extreme_pool__cb_0000789.png", "values": [[5.0, 9.6368, 18.2947, 25.6095, 29.8738, 41.961, 51.4969, 64.7732, 74.3505, 81.0367, 89.0835, 103.8364, 115.0259], [5.0, 5.0, 14.1646, 20.4564, 28.9695, 38.1093, 50.8534, 64.0782, 70.5843, 80.6402, 93.3688, 102.3605, 115.2236], [10.5853, 22.4907, 25.5667, 38.7805, 42.4508, 52.6009, 57.8679, 60.8055, 74.3931, 88.1215, 100.7451, 105.5794, 120.0]], "n_series": 3, "n_points": 13, "difficulty_tier": "L3", "difficulty_components": {"chart_type": "area", "n_series": 3, "n_points": 13, "layout_density": "medium", "legend_complexity": "medium", "tick_density": "medium", "label_complexity": "high", "mark_overlap": "medium", "axis_transform": "log", "annotation_mode": "unlabeled", "image_degradation": "high", "source_kind": "program_transformed"}, "challenge_tags": ["high", "legend_confusion", "legend_disambiguation", "line_crossing", "log_scale_reasoning", "medium"], "source_kind": "program_transformed", "layout_family": "single_panel", "split": "val", "suite_id": "broad_coverage", "annotation": "unlabeled", "axis_scale": "log", "x_labels": ["Day 1", "Day 2", "Day 3", "Day 4", "Day 5", "Day 6", "Day 7", "Day 8", "Day 9", "Day 10", "Day 11", "Day 12", "Day 13"], "series_labels": ["Station 1", "Station 2", "Station 3"], "candidate_pool": "broad_extreme_pool", "table_path": "tables/broad_extreme_pool__cb_0000789.csv", "program_path": "programs/broad_extreme_pool__cb_0000789.json", "object_path": "objects/broad_extreme_pool__cb_0000789.json", "file_name": "images/broad_extreme_pool__cb_0000789.png"}
-{"sample_id": "broad_standard_pool:cb_0000435", "chart_id": "broad_standard_pool:chart_0000435", "chart_type": "bar_h", "chart_group": "core10", "image_path": "images/broad_standard_pool__cb_0000435.png", "values": [[5.0, 50.0436, 79.578, 93.8335, 100.2573, 104.0161], [5.0, 58.017, 87.2876, 101.6346, 110.2174, 112.2579]], "n_series": 2, "n_points": 6, "difficulty_tier": "L1", "difficulty_components": {"chart_type": "bar_h", "n_series": 2, "n_points": 6, "layout_density": "low", "legend_complexity": "low", "tick_density": "low", "label_complexity": "medium", "mark_overlap": "low", "axis_transform": "linear", "annotation_mode": "labeled", "image_degradation": "low", "source_kind": "program_transformed"}, "challenge_tags": ["annotation_claim_mismatch", "low", "medium"], "source_kind": "program_transformed", "layout_family": "single_panel", "split": "val", "suite_id": "broad_coverage", "annotation": "labeled", "axis_scale": "linear", "x_labels": ["Batch-01", "Batch-02", "Batch-03", "Batch-04", "Batch-05", "Batch-06"], "series_labels": ["Station 1", "Station 2"], "candidate_pool": "broad_standard_pool", "table_path": "tables/broad_standard_pool__cb_0000435.csv", "program_path": "programs/broad_standard_pool__cb_0000435.json", "object_path": "objects/broad_standard_pool__cb_0000435.json", "file_name": "images/broad_standard_pool__cb_0000435.png"}
-{"sample_id": "broad_standard_pool:cb_0000859", "chart_id": "broad_standard_pool:chart_0000859", "chart_type": "bar_h", "chart_group": "core10", "image_path": "images/broad_standard_pool__cb_0000859.png", "values": [[39.5837, 39.0285, 39.1559, 39.8444, 39.101, 39.5484, 39.3141, 59.6668, 59.9145, 59.6164, 58.7385, 59.1805, 60.3458, 59.59, 98.0, 98.0, 98.0, 98.0], [30.0, 30.0, 30.0, 30.0, 30.0, 30.0, 43.2711, 44.6677, 45.0583, 44.4126, 44.1595, 44.3666, 44.7981, 90.8018, 91.8223, 91.0687, 91.7028, 91.0866]], "n_series": 2, "n_points": 18, "difficulty_tier": "L1", "difficulty_components": {"chart_type": "bar_h", "n_series": 2, "n_points": 18, "layout_density": "medium", "legend_complexity": "low", "tick_density": "high", "label_complexity": "high", "mark_overlap": "low", "axis_transform": "linear", "annotation_mode": "partial", "image_degradation": "low", "source_kind": "template_programmatic"}, "challenge_tags": ["high", "inverted_priority_color", "scale_truncation_risk"], "source_kind": "template_programmatic", "layout_family": "single_panel", "split": "val", "suite_id": "broad_coverage", "annotation": "partial", "axis_scale": "linear", "x_labels": ["Sub-A", "Sub-B", "Sub-C", "Sub-D", "Sub-E", "Sub-F", "Sub-G", "Sub-H", "Sub-I", "Sub-J", "Sub-K", "Sub-L", "Sub-M", "Sub-N", "Sub-O", "Sub-P", "Sub-A-2", "Sub-B-2"], "series_labels": ["Plant 1", "Plant 2"], "candidate_pool": "broad_standard_pool", "table_path": "tables/broad_standard_pool__cb_0000859.csv", "program_path": "programs/broad_standard_pool__cb_0000859.json", "object_path": "objects/broad_standard_pool__cb_0000859.json", "file_name": "images/broad_standard_pool__cb_0000859.png"}
-{"sample_id": "broad_advanced_pool:cb_0001308", "chart_id": "broad_advanced_pool:chart_0001308", "chart_type": "bar_h", "chart_group": "core10", "image_path": "images/broad_advanced_pool__cb_0001308.png", "values": [[57.0221, 61.4073, 75.0448, 94.6169, 99.0, 99.0], [50.0, 50.0, 50.0, 68.4385, 87.9102, 92.5017], [50.0, 51.8386, 68.9139, 86.3894, 92.7614, 94.2821], [50.0, 50.0, 50.0, 64.5345, 89.3345, 95.7342], [50.0, 51.8678, 70.8189, 88.5944, 94.5066, 95.1723]], "n_series": 5, "n_points": 6, "difficulty_tier": "L2", "difficulty_components": {"chart_type": "bar_h", "n_series": 5, "n_points": 6, "layout_density": "medium", "legend_complexity": "high", "tick_density": "low", "label_complexity": "medium", "mark_overlap": "medium", "axis_transform": "linear", "annotation_mode": "unlabeled", "image_degradation": "high", "source_kind": "program_transformed"}, "challenge_tags": ["legend_confusion", "legend_disambiguation", "low", "medium"], "source_kind": "program_transformed", "layout_family": "single_panel", "split": "val", "suite_id": "broad_coverage", "annotation": "unlabeled", "axis_scale": "linear", "x_labels": ["Dist-A", "Dist-B", "Dist-C", "Dist-D", "Dist-E", "Dist-F"], "series_labels": ["Center 1", "Center 2", "Center 3", "Center 4", "Center 5"], "candidate_pool": "broad_advanced_pool", "table_path": "tables/broad_advanced_pool__cb_0001308.csv", "program_path": "programs/broad_advanced_pool__cb_0001308.json", "object_path": "objects/broad_advanced_pool__cb_0001308.json", "file_name": "images/broad_advanced_pool__cb_0001308.png"}
-{"sample_id": "broad_standard_pool:cb_0001301", "chart_id": "broad_standard_pool:chart_0001301", "chart_type": "bar_v", "chart_group": "core10", "image_path": "images/broad_standard_pool__cb_0001301.png", "values": [[3.0, 3.0, 3.0, 24.8946, 24.6522, 25.0526, 24.9034, 24.9876, 55.9091, 55.6119, 56.1008, 56.0442]], "n_series": 1, "n_points": 12, "difficulty_tier": "L1", "difficulty_components": {"chart_type": "bar_v", "n_series": 1, "n_points": 12, "layout_density": "low", "legend_complexity": "low", "tick_density": "medium", "label_complexity": "high", "mark_overlap": "low", "axis_transform": "linear", "annotation_mode": "labeled", "image_degradation": "low", "source_kind": "template_programmatic"}, "challenge_tags": ["cherry_picked_window", "high", "medium"], "source_kind": "template_programmatic", "layout_family": "single_panel", "split": "val", "suite_id": "broad_coverage", "annotation": "labeled", "axis_scale": "linear", "x_labels": ["Dist-A", "Dist-B", "Dist-C", "Dist-D", "Dist-E", "Dist-F", "Dist-G", "Dist-H", "Dist-I", "Dist-J", "Dist-K", "Dist-L"], "series_labels": ["Area 1"], "candidate_pool": "broad_standard_pool", "table_path": "tables/broad_standard_pool__cb_0001301.csv", "program_path": "programs/broad_standard_pool__cb_0001301.json", "object_path": "objects/broad_standard_pool__cb_0001301.json", "file_name": "images/broad_standard_pool__cb_0001301.png"}
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-{"sample_id": "broad_extreme_pool:cb_0001147", "chart_id": "broad_extreme_pool:chart_0001147", "chart_type": "bar_v", "chart_group": "core10", "image_path": "images/broad_extreme_pool__cb_0001147.png", "values": [[30.0, 76.7467, 87.1405, 88.2751, 87.2418, 87.9878, 88.2202, 87.5501, 87.2874, 87.7056, 87.4062], [33.6727, 95.0141, 98.0, 98.0, 98.0, 98.0, 98.0, 98.0, 98.0, 98.0, 98.0], [30.0, 87.1509, 94.9768, 94.8963, 95.7389, 95.5986, 94.693, 95.2207, 95.0334, 94.6328, 95.1806], [31.4922, 74.4424, 96.4737, 97.2486, 97.8612, 98.0, 98.0, 98.0, 98.0, 96.7449, 96.8639], [30.0, 68.6225, 88.1893, 88.6184, 89.3326, 89.1789, 88.4604, 88.9192, 89.0064, 89.0469, 88.5247]], "n_series": 5, "n_points": 11, "difficulty_tier": "L3", "difficulty_components": {"chart_type": "bar_v", "n_series": 5, "n_points": 11, "layout_density": "high", "legend_complexity": "high", "tick_density": "medium", "label_complexity": "low", "mark_overlap": "medium", "axis_transform": "linear", "annotation_mode": "partial", "image_degradation": "high", "source_kind": "template_programmatic"}, "challenge_tags": ["dual_axis_ambiguity", "low", "medium", "scale_truncation_risk"], "source_kind": "template_programmatic", "layout_family": "single_panel", "split": "val", "suite_id": "broad_coverage", "annotation": "partial", "axis_scale": "linear", "x_labels": ["Sub-A", "Sub-B", "Sub-C", "Sub-D", "Sub-E", "Sub-F", "Sub-G", "Sub-H", "Sub-I", "Sub-J", "Sub-K"], "series_labels": ["Plant 1", "Plant 2", "Plant 3", "Plant 4", "Plant 5"], "candidate_pool": "broad_extreme_pool", "table_path": "tables/broad_extreme_pool__cb_0001147.csv", "program_path": "programs/broad_extreme_pool__cb_0001147.json", "object_path": "objects/broad_extreme_pool__cb_0001147.json", "file_name": "images/broad_extreme_pool__cb_0001147.png"}
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+{"sample_id": "broad_extreme_pool:cb_0001037", "chart_id": "broad_extreme_pool:chart_0001037", "chart_type": "waterfall", "chart_group": "broad8", "image_path": "images/broad_extreme_pool__cb_0001037.png", "values": [[-88.4167, 84.7638, -88.3439, 84.7638, -77.5308, 84.7638]], "n_series": 1, "n_points": 6, "difficulty_tier": "L3", "difficulty_components": {"chart_type": "waterfall", "n_series": 1, "n_points": 6, "layout_density": "low", "legend_complexity": "low", "tick_density": "low", "label_complexity": "low", "mark_overlap": "low", "axis_transform": "linear", "annotation_mode": "labeled", "image_degradation": "high", "source_kind": "template_programmatic"}, "challenge_tags": ["inverted_priority_color", "legend_disambiguation", "low"], "source_kind": "template_programmatic", "layout_family": "single_panel", "split": "test", "suite_id": "broad_coverage", "annotation": "labeled", "axis_scale": "linear", "x_labels": ["Q1-23", "Q2-23", "Q3-23", "Q4-23", "Q1-24", "Q2-24"], "series_labels": ["Net Change"], "candidate_pool": "broad_extreme_pool", "table_path": "tables/broad_extreme_pool__cb_0001037.csv", "program_path": "programs/broad_extreme_pool__cb_0001037.json", "object_path": "objects/broad_extreme_pool__cb_0001037.json", "file_name": "images/broad_extreme_pool__cb_0001037.png"}
+{"sample_id": "broad_extreme_pool:cb_0001244", "chart_id": "broad_extreme_pool:chart_0001244", "chart_type": "waterfall", "chart_group": "broad8", "image_path": "images/broad_extreme_pool__cb_0001244.png", "values": [[19.2662, 18.0404, -1.8178, -21.1787, -29.412, -20.7941, -1.2677, 17.8974, 19.2662]], "n_series": 1, "n_points": 9, "difficulty_tier": "L3", "difficulty_components": {"chart_type": "waterfall", "n_series": 1, "n_points": 9, "layout_density": "low", "legend_complexity": "low", "tick_density": "low", "label_complexity": "low", "mark_overlap": "low", "axis_transform": "linear", "annotation_mode": "labeled", "image_degradation": "medium", "source_kind": "program_transformed"}, "challenge_tags": ["legend_confusion", "legend_disambiguation", "low", "scale_truncation_risk"], "source_kind": "program_transformed", "layout_family": "single_panel", "split": "test", "suite_id": "broad_coverage", "annotation": "labeled", "axis_scale": "linear", "x_labels": ["Q1-23", "Q2-23", "Q3-23", "Q4-23", "Q1-24", "Q2-24", "Q3-24", "Q4-24", "Q1-25"], "series_labels": ["Net Change"], "candidate_pool": "broad_extreme_pool", "table_path": "tables/broad_extreme_pool__cb_0001244.csv", "program_path": "programs/broad_extreme_pool__cb_0001244.json", "object_path": "objects/broad_extreme_pool__cb_0001244.json", "file_name": "images/broad_extreme_pool__cb_0001244.png"}