MCP-ignoring-strategy-parameters-on-single-path-run-Resolved

Hi Team,
Could I get a verification that it's not just my system not working. It seems like when I have a strategy with parameters that I want to optimize, and then have the MCP test the various permutations of the parameters I set in the range, the strategy keeps running with the default settings, ignoring the single-run parameter settings passed.

MCP run_backtest/submit_backtest parameters field is accepted but ignored at runtime. WL9 build 9.0.12.0, MCP Streamable HTTP endpoint.

The backtest request accepts a parameters object (keyed by parameter label) and echoes it back in the job's request echo, but the strategy instance is constructed with constructor defaults — the passed values never reach Parameter.AsInt/AsDouble.

Minimal repro:
1) I had a test strategy with two AddParameter Int32 params, defaults 35/70, that WriteToDebugLogs the received values at StartIndex:
_buyRsi = AddParameter("Buy RSI", ParameterType.Int32, 35, 20, 45, 5);
_sellRsi = AddParameter("Sell RSI", ParameterType.Int32, 70, 55, 80, 5);
2) submit_backtest with "parameters": {"Buy RSI": 25, "Sell RSI": 75} on NUGT, Minute scale.
3) Debug log shows Buy RSI=35 Sell RSI=70 (the defaults).
4) Second run with {"Buy RSI": 45, "Sell RSI": 55} → byte-identical metrics and identical debug line.

CODE:

using WealthLab.Backtest;
using System;
using WealthLab.Core;
using WealthLab.Indicators;

namespace WealthScript3 
{
   public class McpParamProbe : UserStrategyBase
   {
      private Parameter _buyRsi;
      private Parameter _sellRsi;
      private RSI _rsi;

      public McpParamProbe()
      {
         _buyRsi  = AddParameter("Buy RSI",  ParameterType.Int32, 35, 20, 45, 5);
         _sellRsi = AddParameter("Sell RSI", ParameterType.Int32, 70, 55, 80, 5);
         StartIndex = 20;
      }

      public override void Initialize(BarHistory bars)
      {
         _rsi = new RSI(bars.Close, 14);
      }

      public override void Execute(BarHistory bars, int idx)
      {
         if (idx < StartIndex) return;
         if (idx == StartIndex)
            WriteToDebugLog("PARAMS RECEIVED| Buy RSI=" + _buyRsi.AsInt + " Sell RSI=" + _sellRsi.AsInt);
         if (HasOpenPosition(bars, PositionType.Long))
         {
            if (_rsi[idx] >= _sellRsi.AsInt)
               ClosePosition(LastPosition, OrderType.Market, 0, "RSI exit");
         }
         else
         {
            if (_rsi[idx] <= _buyRsi.AsInt)
               PlaceTrade(bars, TransactionType.Buy, OrderType.Market, 0, "RSI entry");
         }
      }
   }
}

thanks,
-bd

#BugReport