PartyPoolBalancedPair as subclass

src/PartyPlanner.sol

@@ -8,6 +8,7 @@ import {LMSRStabilized} from "./LMSRStabilized.sol";
 import {PartyPool} from "./PartyPool.sol";
 import {PartyPoolMintImpl} from "./PartyPoolMintImpl.sol";
 import {PartyPoolSwapImpl} from "./PartyPoolSwapImpl.sol";
+import {PartyPoolBalancedPair} from "./PartyPoolBalancedPair.sol";
 
 /// @title PartyPlanner
 /// @notice Factory contract for creating and tracking PartyPool instances
@@ -86,7 +87,21 @@ contract PartyPlanner is IPartyPlanner {
         require(_kappa > int128(0), "Planner: kappa must be > 0");
 
         // Create a new PartyPool instance (kappa-based constructor)
-        pool = new PartyPool(
+        pool = _stable && _tokens.length == 2 ?
+        new PartyPoolBalancedPair(
+            name_,
+            symbol_,
+            _tokens,
+            _bases,
+            _kappa,
+            _swapFeePpm,
+            _flashFeePpm,
+            PROTOCOL_FEE_PPM,
+            PROTOCOL_FEE_ADDRESS,
+            PartyPoolSwapImpl(SWAP_MINT_IMPL),
+            MINT_IMPL
+        ) :
+        new PartyPool(
             name_,
             symbol_,
             _tokens,
@@ -96,7 +111,6 @@ contract PartyPlanner is IPartyPlanner {
             _flashFeePpm,
             PROTOCOL_FEE_PPM,
             PROTOCOL_FEE_ADDRESS,
-            _stable,
             PartyPoolSwapImpl(SWAP_MINT_IMPL),
             MINT_IMPL
         );