Upload Hybrid ensemble + XAI artifacts

artifacts/baseline_model_metrics_test.csv

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+Model,RMSE,MAE,MAPE_%,R2
+XGBoost,97419.8202586981,82900.17320288831,12.381141067984453,0.7727399733098566
+RandomForest,102866.03222167933,84145.62120420895,12.436963268871496,0.7466199705495759
+LightGBM,96835.72852753119,83357.36032899778,12.489386840967049,0.77545693113205
+Ridge,119658.87124135582,93412.82460751964,13.392654253043993,0.6571389040922377

artifacts/hybrid_cluster_bundle.joblib

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+oid sha256:0b63b3d6af8683533524d1693c773dad42a227ced99cd8c8dd7c0c88085b2ec2
+size 271015261

artifacts/hybrid_cluster_feature_columns.json

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+[
+  "transaction_year",
+  "level_mid",
+  "lease_remaining_years",
+  "floor_area_sqm",
+  "room_count",
+  "dist_to_mrt_m",
+  "orientation_score",
+  "dist_to_highway_m",
+  "dist_to_foodcourt_m",
+  "dist_to_nearest_mall_m",
+  "mall_count_3km",
+  "mall_weighted_access_3km",
+  "dist_to_nearest_school_m",
+  "school_count_1km",
+  "primary_school_quality_1km_weighted",
+  "primary_school_top_quality_1km",
+  "primary_school_count_1km",
+  "trans_sold_count",
+  "trans_rented_count",
+  "trans_total_count",
+  "trans_rental_ratio",
+  "market_activity_score",
+  "yoy_volume_change",
+  "town_ANG MO KIO",
+  "town_BEDOK",
+  "town_BISHAN",
+  "town_BUKIT BATOK",
+  "town_BUKIT MERAH",
+  "town_BUKIT PANJANG",
+  "town_BUKIT TIMAH",
+  "town_CENTRAL AREA",
+  "town_CHOA CHU KANG",
+  "town_CLEMENTI",
+  "town_GEYLANG",
+  "town_HOUGANG",
+  "town_JURONG EAST",
+  "town_JURONG WEST",
+  "town_KALLANG/WHAMPOA",
+  "town_MARINE PARADE",
+  "town_PASIR RIS",
+  "town_PUNGGOL",
+  "town_QUEENSTOWN",
+  "town_SEMBAWANG",
+  "town_SENGKANG",
+  "town_SERANGOON",
+  "town_TAMPINES",
+  "town_TOA PAYOH",
+  "town_WOODLANDS",
+  "town_YISHUN",
+  "flat_type_1 ROOM",
+  "flat_type_2 ROOM",
+  "flat_type_3 ROOM",
+  "flat_type_4 ROOM",
+  "flat_type_5 ROOM",
+  "flat_type_EXECUTIVE",
+  "flat_type_MULTI-GENERATION",
+  "flat_model_2-room",
+  "flat_model_3Gen",
+  "flat_model_Adjoined flat",
+  "flat_model_Apartment",
+  "flat_model_DBSS",
+  "flat_model_Improved",
+  "flat_model_Improved-Maisonette",
+  "flat_model_Maisonette",
+  "flat_model_Model A",
+  "flat_model_Model A-Maisonette",
+  "flat_model_Model A2",
+  "flat_model_Multi Generation",
+  "flat_model_New Generation",
+  "flat_model_Premium Apartment",
+  "flat_model_Premium Apartment Loft",
+  "flat_model_Premium Maisonette",
+  "flat_model_Simplified",
+  "flat_model_Standard",
+  "flat_model_Terrace",
+  "flat_model_Type S1",
+  "flat_model_Type S2"
+]

artifacts/hybrid_cluster_kmeans.joblib

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+version https://git-lfs.github.com/spec/v1
+oid sha256:45d65fcf72c6717eba01944a479a91e7795fc591876305c70bcc4bfbcc0f9e2a
+size 818922

artifacts/hybrid_cluster_meta.json

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+{
+  "model_name": "Hybrid Cluster Ensemble",
+  "model_type": "cluster_routed_meta_stack",
+  "base_models": ["Ridge", "XGBoost", "LightGBM", "RandomForest"],
+  "meta_learner": "Ridge",
+  "n_clusters": 3,
+  "min_cluster_train": 5000,
+  "n_features": 77,
+  "test_metrics": {
+    "rmse": 37791,
+    "mae": 26534,
+    "mape_pct": 4.01,
+    "r2": 0.9658
+  },
+  "train_size": 204066,
+  "val_size": 27585,
+  "test_size": 29048,
+  "cluster_counts_train": {
+    "0": 75038,
+    "1": 109549,
+    "2": 19479
+  },
+  "cluster_counts_val": {
+    "0": 11523,
+    "1": 13546,
+    "2": 2516
+  },
+  "cluster_counts_test": {
+    "0": 12605,
+    "1": 13690,
+    "2": 2753
+  },
+  "n_test_rows_using_global_fallback": 0
+}

artifacts/hybrid_cluster_models.joblib

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+size 138769155

artifacts/hybrid_xai/cbr_features.json

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+[
+  "floor_area_sqm",
+  "level_mid",
+  "lease_remaining_years",
+  "dist_to_mrt_m",
+  "dist_to_nearest_mall_m",
+  "room_count",
+  "market_activity_score"
+]

artifacts/hybrid_xai/cbr_index.joblib

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+size 13781929

artifacts/hybrid_xai/cbr_scaler.joblib

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+size 1343

artifacts/hybrid_xai/cbr_training_data.parquet

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+size 3665247

artifacts/hybrid_xai/cluster_profiles.json

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+{
+  "n_clusters": 4,
+  "_note": "Derived from current hybrid_cluster_bundle.joblib. Regenerate when retraining via notebook 04_xai_layer/07_composite_treeshap.ipynb (cluster-profile cell).",
+  "clusters": {
+    "0": {
+      "label": "Newer suburban larger flats",
+      "summary": "~110 sqm · ~80yr lease · close to MRT · NE corridor",
+      "top_towns": ["SENGKANG", "PUNGGOL", "TAMPINES", "CHOA CHU KANG", "HOUGANG"],
+      "share": 0.419,
+      "n_rows": 110266,
+      "stats": {
+        "floor_area_sqm": 110.5,
+        "lease_remaining_years": 79.5,
+        "level_mid": 9.5,
+        "room_count": 4.5,
+        "dist_to_mrt_m": 864.5,
+        "resale_price_mean": 592833
+      }
+    },
+    "1": {
+      "label": "Older compact mature-estate flats",
+      "summary": "~75 sqm · ~65yr lease · 3-room · mature estates",
+      "top_towns": ["BEDOK", "ANG MO KIO", "BUKIT BATOK", "TAMPINES", "GEYLANG"],
+      "share": 0.291,
+      "n_rows": 76607,
+      "stats": {
+        "floor_area_sqm": 75.4,
+        "lease_remaining_years": 65.3,
+        "level_mid": 7.3,
+        "room_count": 3.3,
+        "dist_to_mrt_m": 1636.6,
+        "resale_price_mean": 400200
+      }
+    },
+    "2": {
+      "label": "Central high-floor premium flats",
+      "summary": "~87 sqm · high floor (~12) · central towns · highest avg price",
+      "top_towns": ["KALLANG/WHAMPOA", "BUKIT MERAH", "TOA PAYOH", "QUEENSTOWN", "CENTRAL AREA"],
+      "share": 0.082,
+      "n_rows": 21585,
+      "stats": {
+        "floor_area_sqm": 87.4,
+        "lease_remaining_years": 71.4,
+        "level_mid": 12.7,
+        "room_count": 3.8,
+        "dist_to_mrt_m": 1375.5,
+        "resale_price_mean": 641724
+      }
+    },
+    "3": {
+      "label": "Outlying larger flats far from MRT",
+      "summary": "~103 sqm · 5km+ from MRT · NW/W towns",
+      "top_towns": ["WOODLANDS", "YISHUN", "JURONG WEST", "SEMBAWANG", "CHOA CHU KANG"],
+      "share": 0.207,
+      "n_rows": 54546,
+      "stats": {
+        "floor_area_sqm": 103.0,
+        "lease_remaining_years": 77.1,
+        "level_mid": 7.5,
+        "room_count": 4.3,
+        "dist_to_mrt_m": 5465.3,
+        "resale_price_mean": 465287
+      }
+    }
+  }
+}

artifacts/hybrid_xai/composite_treeshap_global_importance.json

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+{
+  "method": "CompositeTreeSHAP",
+  "model": "full_hybrid_ensemble",
+  "n_samples": 500,
+  "global_feature_importance": {
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+    "model": "data_driven_2026",
+    "source_years": ">=2022",
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+      "area=medium(70-100sqm)": "medium flat (70\u2013100 sqm)",
+      "area=large(>=100sqm)": "large flat (\u2265100 sqm)",
+      "storey=low(1-5)": "low floor (1\u20135)",
+      "storey=mid(6-12)": "mid floor (6\u201312)",
+      "storey=high(>12)": "high floor (>12)",
+      "mrt=walking(<0.5km)": "walking distance to MRT (<500 m)",
+      "mrt=near(0.5-0.8km)": "near an MRT (500\u2013800 m)",
+      "mrt=far(>0.8km)": "far from MRT (>800 m)",
+      "lease=short(<55yr)": "short lease (<55 yrs)",
+      "lease=medium(55-80yr)": "medium lease (55\u201380 yrs)",
+      "lease=long(>=80yr)": "long lease (\u226580 yrs)",
+      "mature_estate=yes": "mature estate",
+      "mature_estate=no": "non-mature estate",
+      "rooms=2-3": "2- or 3-room",
+      "rooms=4": "4-room",
+      "rooms=5+": "5-room / executive",
+      "price=budget(<500k)": "budget range (<$500k)",
+      "price=mid(500-650k)": "mid range ($500k\u2013$650k)",
+      "price=premium(>=650k)": "premium range (\u2265$650k)"
+    },
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+      "transaction_year",
+      "room_count",
+      "is_mature_estate"
+    ]
+  }
+}

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