Add project files.

XStringUtils.slnx

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+<Solution>
+  <Project Path="XStringUtils/XStringUtils.csproj" />
+</Solution>

XStringUtils/Prettify.cs

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+using System.Globalization;
+using System.Numerics;
+
+namespace XStringUtils;
+
+public static partial class XStringUtils
+{
+    public static string PrettifyTiny(double number)
+    {
+        return number > 0.0001
+            ? number.ToString("F4", CultureInfo.InvariantCulture)
+            : number.ToString("E3", CultureInfo.InvariantCulture);
+    }
+
+    public enum Notation
+    {
+        KMB,
+        Logarithmic10,
+        LogarithmicE,
+    }
+
+    extension<T>(T number) where T : IFloatingPoint<T>, ILogarithmicFunctions<T>, IPowerFunctions<T>
+    {
+        public string Prettify(Notation notation = Notation.KMB)
+        {
+            if (!T.IsFinite(number))
+            {
+                return "∞";
+            }
+
+            if (number == T.Zero)
+            {
+                return PrettifySub(0.0);
+            }
+
+            if (number < T.Zero)
+            {
+                return "-" + Prettify(-number, notation);
+            }
+
+            if (number < T.CreateChecked(0.005))
+            {
+                return number.ToString("E2", CultureInfo.InvariantCulture);
+            }
+
+            int @base = int.CreateChecked(T.Floor(T.Log(number) / T.Log(T.CreateChecked(1000))));
+
+            if (@base <= 0)
+            {
+                return PrettifySub(number);
+            }
+
+            if (notation == Notation.Logarithmic10 || notation == Notation.LogarithmicE)
+            {
+                T logBase = notation == Notation.Logarithmic10 ? T.CreateChecked(10) : T.E;
+                T exponent = T.Log(number, logBase);
+                return PrettifySub(exponent) + "L" + logBase;
+            }
+
+            T thousand = T.CreateChecked(1000);
+            T tbase = T.CreateChecked(@base);
+
+            number /= T.Pow(thousand, tbase);
+
+            // Prevent 1000K, 1000M, etc.
+            if (number >= T.CreateChecked(999.5))
+            {
+                number /= thousand;
+                @base++;
+            }
+
+            string suffix = ResolveSuffix(@base);
+
+            return PrettifySub(number) + suffix;
+        }
+    }
+
+    private static string PrettifySub<T>(T number) where T : IFloatingPoint<T>
+    {
+        T floor = T.Floor(number);
+
+        if (number == floor)
+        {
+            return number.ToString(null, CultureInfo.InvariantCulture);
+        }
+
+        int precision = 3 - floor.ToString(null, CultureInfo.InvariantCulture).Length;
+
+        return number.ToString("F" + precision, CultureInfo.InvariantCulture);
+    }
+
+    private static readonly string[] Suffices =
+    [
+        "K","M","B","T","Qa","Qi","Sx","Sp","Oc","No","Dc","Ud",
+            "Dd","Td","Qad","Qid","Sxd","Spd","Od","Nd","V","Uv","Dv",
+            "Tv","Qav","Qiv","Sxv","Spv","Ov","Nv","Tg","Utg","Dtg","Ttg",
+            "Qatg","Qitg","Sxtg","Sptg","Otg","Ntg","Qaa","Uqa","Dqa","Tqa",
+            "Qaqa","Qiqa","Sxqa","Spqa","Oqa","Nqa","Qia","Uqi","Dqi",
+            "Tqi","Qaqi","Qiqi","Sxqi","Spqi","Oqi","Nqi","Sxa","Usx",
+            "Dsx","Tsx","Qasx","Qisx","Sxsx","Spsx","Osx","Nsx","Spa",
+            "Usp","Dsp","Tsp","Qasp","Qisp","Sxsp","Spsp","Osp","Nsp",
+            "Og","Uog","Dog","Tog","Qaog","Qiog","Sxog","Spog","Oog",
+            "Nog","Na","Un","Dn","Tn","Qan","Qin","Sxn","Spn","On",
+            "Nn","Ct","Uc"
+    ];
+
+    private static string ResolveSuffix(int @base)
+    {
+        return @base <= Suffices.Length
+            ? Suffices[@base - 1]
+            : "e" + (@base * 3);
+    }
+}

XStringUtils/XStringUtils.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <SignAssembly>False</SignAssembly>
+    <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
+    <Title>XStringUtils</Title>
+    <Authors>SacredFloof</Authors>
+    <Company>SacredFloof</Company>
+    <Description>Small string utilities. AOT-friendly</Description>
+    <Copyright>SacredFloof 2026</Copyright>
+    <PackageTags>Utility</PackageTags>
+    <AssemblyVersion>1.0.1</AssemblyVersion>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <IsTrimmable>True</IsTrimmable>
+    <IsAotCompatible>True</IsAotCompatible>
+    <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+    <IsTrimmable>True</IsTrimmable>
+    <IsAotCompatible>True</IsAotCompatible>
+    <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
+  </PropertyGroup>
+
+  <Target Name="PostBuild" AfterTargets="PostBuildEvent" Condition="'$(Configuration)'=='Release'">
+    <Exec Command="dotnet nuget push -s Gitea --api-key %25GITEA_API_KEY%25 '.\bin\Release\XStringUtils.$(Version).nupkg'" />
+  </Target>
+
+</Project>