Mod.cs

using System;
using System.Diagnostics.CodeAnalysis;
using Harmony;
using HugsLib;
using JetBrains.Annotations;
using RimWorld;
using Verse;

namespace MorePawns
{
  [UsedImplicitly]
  public class Mod : ModBase
  {
    public override string ModIdentifier { get; } = "MorePawns";

    [ThreadStatic] internal static bool InConfigureStartingPawns;
  }

  [HarmonyPatch(typeof(Widgets), "TextFieldNumeric")]
  internal static class TextFieldNumericPatch
  {
    [HarmonyPrefix]
    public static void ReplaceMax(ref float max)
    {
      if (Mod.InConfigureStartingPawns)
      {
        max = 1E+09f;
      }
    }
  }
  
  [HarmonyPatch(typeof(ScenPart_ConfigPage_ConfigureStartingPawns), "DoEditInterface")]
  [UsedImplicitly]
  internal static class ScenPartPatch
  {
    [HarmonyPrefix]
    [UsedImplicitly]
    public static void Prefix() => Mod.InConfigureStartingPawns = true;

    [HarmonyPostfix]
    [UsedImplicitly]
    public static void Postfix() => Mod.InConfigureStartingPawns = false;
  }
}