feat: add PnL report script

scripts/pnl_report.py

@@ -0,0 +1,24 @@
+"""
+Compute net profit and loss across all positions.
+
+Requires kalshi-python SDK and API credentials.
+"""
+
+import os
+from kalshi_python import KalshiClient, Configuration  # type: ignore
+
+def build_client():
+    cfg = Configuration(host=os.getenv("KALSHI_API_HOST", "https://api.elections.kalshi.com/trade-api/v2"))
+    cfg.api_key_id = os.getenv("KALSHI_API_KEY_ID")
+    with open(os.getenv("KALSHI_PRIVATE_KEY_PATH"), "r", encoding="utf-8") as f:
+        cfg.private_key_pem = f.read()
+    return KalshiClient(cfg)
+
+def main() -> None:
+    client = build_client()
+    positions = client.trader_api.get_positions().positions  # type: ignore
+    total_pnl = sum(p.realized_pnl + p.unrealized_pnl for p in positions)  # type: ignore
+    print(f"Total PnL across positions: {total_pnl:.2f}")
+
+if __name__ == "__main__":
+    main()