HK Weather Prediction Market Pipeline: WeatherNext + HKO + Polymarket

- Open-Meteo WeatherNext API client for HK forecasts
- HKO public data client (current conditions, 9-day forecast, typhoon warnings)
- HK-specific weather extraction and calibration
- Polymarket market scanning, price discovery, and market creation proposals
- Trading strategy engine: edge detection, Kelly criterion sizing, probability calibration
- End-to-end pipeline with dry-run mode and scheduled runner
- Interactive dashboard with live HK weather + forecasts + trading signals

Dependencies: Python 3.10+, openmeteo-requests, pandas
No API keys needed for dry-run mode.
Polymarket trading requires private key in .env.

scripts/download_weights.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+"""Download WeatherNext model weights from Google Cloud Storage."""
+
+import os
+import sys
+from pathlib import Path
+from config import WEIGHTS_DIR, MODEL_CONFIGS
+
+try:
+    from google.cloud import storage
+except ImportError:
+    import subprocess
+    subprocess.check_call([sys.executable, "-m", "pip", "install", "google-cloud-storage"])
+    from google.cloud import storage
+
+def download_blob(bucket_name, source_blob_name, destination):
+    """Download a blob from GCS bucket."""
+    print(f"Downloading {source_blob_name}...")
+    storage_client = storage.Client.create_anonymous_client()
+    bucket = storage_client.bucket(bucket_name)
+    blob = bucket.blob(source_blob_name)
+    blob.download_to_filename(str(destination))
+    print(f"  -> {destination} ({os.path.getsize(destination) / 1e6:.1f} MB)")
+
+def download_all():
+    """Download all required model weights."""
+    bucket = "dm_graphcast"
+
+    weights = [
+        "WeatherNextCyclones_Mini_<2024.npz",
+        "WeatherNextCyclones_Mini_<2023.npz",
+    ]
+
+    for w in weights:
+        dst = WEIGHTS_DIR / w
+        if dst.exists():
+            print(f"Skipping {w} (already exists)")
+            continue
+        try:
+            download_blob(bucket, w, dst)
+        except Exception as e:
+            print(f"Failed to download {w}: {e}")
+
+    print("\n=== Download complete ===")
+    print(f"Weights stored in: {WEIGHTS_DIR}")
+
+if __name__ == "__main__":
+    download_all()