diff --git a/README.md b/README.md
index efb696b..2eb4ebe 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 CaptchaKit is an ASP.NET Core CAPTCHA foundation with server-side, one-time validation and pluggable generators and storage.
 
-`CaptchaKit.Core` has provider-neutral contracts. `CaptchaKit.AspNetCore` supplies a SkiaSharp text-image generator and `IDistributedCache` storage.
+`CaptchaKit.Core` has provider-neutral contracts. `CaptchaKit.AspNetCore` supplies randomized text-image, selection, and one-click challenges with `IDistributedCache` storage.
 
 The package does not claim that image CAPTCHA alone defeats determined automation. Deploy it with rate limits, account lockout, and appropriate risk controls.
 
@@ -27,7 +27,7 @@ builder.Services.AddCaptchaKit(options =>
 });
 ```
 
-An endpoint can obtain an image challenge and return it in the format used by its UI:
+An endpoint can obtain a challenge and return its type, prompt, choices, and optional image in the format used by its UI:
 
 ```csharp
 var challenge = await captcha.CreateAsync(cancellationToken);
diff --git a/artifacts/CaptchaKit.AspNetCore.0.1.0-preview.1.nupkg b/artifacts/CaptchaKit.AspNetCore.0.1.0-preview.1.nupkg
index 4404d58..66ccf08 100644
Binary files a/artifacts/CaptchaKit.AspNetCore.0.1.0-preview.1.nupkg and b/artifacts/CaptchaKit.AspNetCore.0.1.0-preview.1.nupkg differ
diff --git a/artifacts/CaptchaKit.AspNetCore.0.1.0-preview.2.nupkg b/artifacts/CaptchaKit.AspNetCore.0.1.0-preview.2.nupkg
new file mode 100644
index 0000000..4a7c668
Binary files /dev/null and b/artifacts/CaptchaKit.AspNetCore.0.1.0-preview.2.nupkg differ
diff --git a/artifacts/CaptchaKit.Core.0.1.0-preview.1.nupkg b/artifacts/CaptchaKit.Core.0.1.0-preview.1.nupkg
index a242d48..6670080 100644
Binary files a/artifacts/CaptchaKit.Core.0.1.0-preview.1.nupkg and b/artifacts/CaptchaKit.Core.0.1.0-preview.1.nupkg differ
diff --git a/artifacts/CaptchaKit.Core.0.1.0-preview.2.nupkg b/artifacts/CaptchaKit.Core.0.1.0-preview.2.nupkg
new file mode 100644
index 0000000..154645b
Binary files /dev/null and b/artifacts/CaptchaKit.Core.0.1.0-preview.2.nupkg differ
diff --git a/src/CaptchaKit.AspNetCore/CaptchaKit.AspNetCore.csproj b/src/CaptchaKit.AspNetCore/CaptchaKit.AspNetCore.csproj
index 612b588..04dac06 100644
--- a/src/CaptchaKit.AspNetCore/CaptchaKit.AspNetCore.csproj
+++ b/src/CaptchaKit.AspNetCore/CaptchaKit.AspNetCore.csproj
@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <PackageId>CaptchaKit.AspNetCore</PackageId>
-    <Version>0.1.0-preview.1</Version>
+    <Version>0.1.0-preview.2</Version>
     <Authors>CaptchaKit Contributors</Authors>
     <Description>ASP.NET Core and distributed-cache integration for CaptchaKit.</Description>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
diff --git a/src/CaptchaKit.AspNetCore/CaptchaKitService.cs b/src/CaptchaKit.AspNetCore/CaptchaKitService.cs
index f0af069..8451ebd 100644
--- a/src/CaptchaKit.AspNetCore/CaptchaKitService.cs
+++ b/src/CaptchaKit.AspNetCore/CaptchaKitService.cs
@@ -12,12 +12,15 @@ public sealed class CaptchaKitOptions
     public int CodeLength { get; set; } = 5;
     public TimeSpan Lifetime { get; set; } = TimeSpan.FromMinutes(2);
     public string CacheKeyPrefix { get; set; } = "captchakit:";
+    public bool RequireBrowserProof { get; set; }
+    public bool EnableOneClickChallenge { get; set; } = true;
+    public bool EnableSelectionChallenge { get; set; } = true;
 }
 
 public interface ICaptchaKitService
 {
-    Task<CaptchaChallenge> CreateAsync(CancellationToken cancellationToken = default);
-    Task<bool> VerifyAsync(string id, string answer, CancellationToken cancellationToken = default);
+    Task<CaptchaChallenge> CreateAsync(CaptchaRequestContext? context = null, CancellationToken cancellationToken = default);
+    Task<bool> VerifyAsync(string id, string answer, CaptchaRequestContext? context = null, CancellationToken cancellationToken = default);
 }
 
 public sealed class CaptchaKitService(
@@ -25,28 +28,35 @@ public sealed class CaptchaKitService(
     ICaptchaChallengeStore store,
     CaptchaKitOptions options) : ICaptchaKitService
 {
-    public async Task<CaptchaChallenge> CreateAsync(CancellationToken cancellationToken = default)
+    public async Task<CaptchaChallenge> CreateAsync(CaptchaRequestContext? context = null, CancellationToken cancellationToken = default)
     {
+        if (options.RequireBrowserProof && !HasBrowserProof(context))
+            throw new ArgumentException("A browser proof is required for this captcha challenge.", nameof(context));
         var id = Convert.ToHexString(RandomNumberGenerator.GetBytes(24));
         var expiresAt = DateTimeOffset.UtcNow.Add(options.Lifetime);
         var generated = generator.Generate(new CaptchaGenerationRequest(id, expiresAt, options.CodeLength));
         if (!string.Equals(generated.Challenge.Id, id, StringComparison.Ordinal))
             throw new InvalidOperationException("The captcha generator must preserve the requested challenge ID.");
-        await store.StoreAsync(id, Hash(id, Normalize(generated.Answer)), expiresAt, cancellationToken);
+        await store.StoreAsync(id, Hash(id, Normalize(generated.Answer), BrowserBinding(context)), expiresAt, cancellationToken);
         return generated.Challenge;
     }
 
-    public async Task<bool> VerifyAsync(string id, string answer, CancellationToken cancellationToken = default)
+    public async Task<bool> VerifyAsync(string id, string answer, CaptchaRequestContext? context = null, CancellationToken cancellationToken = default)
     {
-        if (string.IsNullOrWhiteSpace(id) || string.IsNullOrWhiteSpace(answer))
+        if (string.IsNullOrWhiteSpace(id) || string.IsNullOrWhiteSpace(answer) ||
+            (options.RequireBrowserProof && !HasBrowserProof(context)))
             return false;
         var expected = await store.TakeAsync(id, cancellationToken);
-        return expected is not null && FixedEquals(expected, Hash(id, Normalize(answer)));
+        return expected is not null && FixedEquals(expected, Hash(id, Normalize(answer), BrowserBinding(context)));
     }
 
     private static string Normalize(string value) => value.Trim().ToUpperInvariant();
-    private static string Hash(string id, string answer) =>
-        Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes($"{id}:{answer}")));
+    private static bool HasBrowserProof(CaptchaRequestContext? context) =>
+        !string.IsNullOrWhiteSpace(context?.BrowserProof) && context.BrowserProof.Length <= 256;
+    private static string BrowserBinding(CaptchaRequestContext? context) =>
+        HasBrowserProof(context) ? Hash(context!.BrowserProof!, "browser", "") : "unbound";
+    private static string Hash(string id, string answer, string browserBinding) =>
+        Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes($"{id}:{answer}:{browserBinding}")));
     private static bool FixedEquals(string left, string right) =>
         CryptographicOperations.FixedTimeEquals(Encoding.UTF8.GetBytes(left), Encoding.UTF8.GetBytes(right));
 }
@@ -72,6 +82,41 @@ public sealed class DistributedCaptchaChallengeStore(
     private string Key(string id) => options.CacheKeyPrefix + id;
 }
 
+public sealed class RandomCaptchaGenerator(CaptchaKitOptions options) : ICaptchaGenerator
+{
+    private readonly SkiaTextCaptchaGenerator _text = new();
+
+    public GeneratedCaptcha Generate(CaptchaGenerationRequest request)
+    {
+        var roll = RandomNumberGenerator.GetInt32(100);
+        if (options.EnableOneClickChallenge && roll < 15)
+        {
+            return new GeneratedCaptcha(
+                new CaptchaChallenge(request.Id, CaptchaChallengeType.OneClick, request.ExpiresAt,
+                    "请点击确认按钮继续登录"),
+                "CONFIRM");
+        }
+        if (options.EnableSelectionChallenge && roll < 45)
+        {
+            var correct = RandomNumberGenerator.GetInt32(2, 10).ToString();
+            var candidates = Enumerable.Range(1, 9)
+                .Where(x => x.ToString() != correct)
+                .OrderBy(_ => RandomNumberGenerator.GetInt32(int.MaxValue))
+                .Take(3)
+                .Append(int.Parse(correct))
+                .OrderBy(_ => RandomNumberGenerator.GetInt32(int.MaxValue))
+                .Select(x => new CaptchaChoice($"choice-{x}", x.ToString()))
+                .ToList();
+            var answer = candidates.Single(x => x.Label == correct).Id;
+            return new GeneratedCaptcha(
+                new CaptchaChallenge(request.Id, CaptchaChallengeType.Selection, request.ExpiresAt,
+                    $"请选择数字 {correct}", candidates),
+                answer);
+        }
+        return _text.Generate(request);
+    }
+}
+
 public sealed class SkiaTextCaptchaGenerator : ICaptchaGenerator
 {
     private const string Alphabet = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789";
@@ -99,7 +144,8 @@ public sealed class SkiaTextCaptchaGenerator : ICaptchaGenerator
         DrawNoise(canvas, 160, 54, 8);
         using var image = SKImage.FromBitmap(bitmap);
         using var data = image.Encode(SKEncodedImageFormat.Png, 100);
-        var challenge = new CaptchaChallenge(request.Id, "image/png", data.ToArray(), request.ExpiresAt);
+        var challenge = new CaptchaChallenge(request.Id, CaptchaChallengeType.TextImage, request.ExpiresAt,
+            "请输入图中的字符", null, "image/png", data.ToArray());
         return new GeneratedCaptcha(challenge, answer);
     }
 
@@ -133,7 +179,7 @@ public static class CaptchaKitServiceCollectionExtensions
             options.Lifetime > TimeSpan.FromMinutes(10))
             throw new ArgumentOutOfRangeException(nameof(configure), "Code length must be 4–8 and lifetime must be 30 seconds–10 minutes.");
         services.AddSingleton(options);
-        services.AddSingleton<ICaptchaGenerator, SkiaTextCaptchaGenerator>();
+        services.AddSingleton<ICaptchaGenerator, RandomCaptchaGenerator>();
         services.AddSingleton<ICaptchaChallengeStore, DistributedCaptchaChallengeStore>();
         services.AddSingleton<ICaptchaKitService, CaptchaKitService>();
         return services;
diff --git a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.dll
index c811e88..0a6392b 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.pdb b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.pdb
index c646003..5b47a3d 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.pdb and b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.AspNetCore.pdb differ
diff --git a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.dll b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.dll
index d073b38..4141e32 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.dll and b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.pdb b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.pdb
index 4f2084a..ba1cdc2 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.pdb and b/src/CaptchaKit.AspNetCore/bin/Debug/net10.0/CaptchaKit.Core.pdb differ
diff --git a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.deps.json b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.deps.json
index eae64b8..2c81ca8 100644
--- a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.deps.json
+++ b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.deps.json
@@ -6,9 +6,9 @@
   "compilationOptions": {},
   "targets": {
     ".NETCoreApp,Version=v10.0": {
-      "CaptchaKit.AspNetCore/0.1.0-preview.1": {
+      "CaptchaKit.AspNetCore/0.1.0-preview.2": {
         "dependencies": {
-          "CaptchaKit.Core": "0.1.0-preview.1",
+          "CaptchaKit.Core": "0.1.0-preview.2",
           "SkiaSharp": "4.151.1"
         },
         "runtime": {
@@ -70,7 +70,7 @@
           }
         }
       },
-      "CaptchaKit.Core/0.1.0-preview.1": {
+      "CaptchaKit.Core/0.1.0-preview.2": {
         "runtime": {
           "CaptchaKit.Core.dll": {
             "assemblyVersion": "0.1.0.0",
@@ -81,7 +81,7 @@
     }
   },
   "libraries": {
-    "CaptchaKit.AspNetCore/0.1.0-preview.1": {
+    "CaptchaKit.AspNetCore/0.1.0-preview.2": {
       "type": "project",
       "serviceable": false,
       "sha512": ""
@@ -107,7 +107,7 @@
       "path": "skiasharp.nativeassets.win32/4.151.1",
       "hashPath": "skiasharp.nativeassets.win32.4.151.1.nupkg.sha512"
     },
-    "CaptchaKit.Core/0.1.0-preview.1": {
+    "CaptchaKit.Core/0.1.0-preview.2": {
       "type": "project",
       "serviceable": false,
       "sha512": ""
diff --git a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.dll
index 60966b6..6258d2f 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.pdb b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.pdb
index 00afd26..f144c0d 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.pdb and b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.AspNetCore.pdb differ
diff --git a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.dll b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.dll
index 287b455..26ed172 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.dll and b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.pdb b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.pdb
index 305b8a2..e013d72 100644
Binary files a/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.pdb and b/src/CaptchaKit.AspNetCore/bin/Release/net10.0/CaptchaKit.Core.pdb differ
diff --git a/src/CaptchaKit.AspNetCore/obj/CaptchaKit.AspNetCore.csproj.nuget.dgspec.json b/src/CaptchaKit.AspNetCore/obj/CaptchaKit.AspNetCore.csproj.nuget.dgspec.json
index 1c464d3..e546083 100644
--- a/src/CaptchaKit.AspNetCore/obj/CaptchaKit.AspNetCore.csproj.nuget.dgspec.json
+++ b/src/CaptchaKit.AspNetCore/obj/CaptchaKit.AspNetCore.csproj.nuget.dgspec.json
@@ -5,7 +5,7 @@
   },
   "projects": {
     "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.AspNetCore\\CaptchaKit.AspNetCore.csproj": {
-      "version": "0.1.0-preview.1",
+      "version": "0.1.0-preview.2",
       "restore": {
         "projectUniqueName": "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.AspNetCore\\CaptchaKit.AspNetCore.csproj",
         "projectName": "CaptchaKit.AspNetCore",
@@ -499,7 +499,7 @@
       }
     },
     "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.Core\\CaptchaKit.Core.csproj": {
-      "version": "0.1.0-preview.1",
+      "version": "0.1.0-preview.2",
       "restore": {
         "projectUniqueName": "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.Core\\CaptchaKit.Core.csproj",
         "projectName": "CaptchaKit.Core",
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaK.95F6C895.Up2Date b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaK.95F6C895.Up2Date
new file mode 100644
index 0000000..e69de29
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs
index 4db6e3d..0ef68a6 100644
--- a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs
+++ b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyDescriptionAttribute("ASP.NET Core and distributed-cache integration for CaptchaKit.")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("0.1.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.1+149eb66890ce8ac96fae9a9b7e7f6c09bb0d0269")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.1+0631f17bf5ed33b67f1af0648d13aedcff701607")]
 [assembly: System.Reflection.AssemblyProductAttribute("CaptchaKit.AspNetCore")]
 [assembly: System.Reflection.AssemblyTitleAttribute("CaptchaKit.AspNetCore")]
 [assembly: System.Reflection.AssemblyVersionAttribute("0.1.0.0")]
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache
index be9d0dd..7e81afb 100644
--- a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache
+++ b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache
@@ -1 +1 @@
-537ddc0f8d2ca50e3ea8f9f64f468e1cc194e9f8e17e5bb91599d54391e9590b
+e0e1a101a5bf9266179dfaa4693799b6aec33b74eda7a9c395265d0b418e6cdd
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache
index b5ac953..7377ec9 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache and b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.CoreCompileInputs.cache b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.CoreCompileInputs.cache
index 2ccf8b3..a2bbd85 100644
--- a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.CoreCompileInputs.cache
+++ b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-0c7c2a6c84005509d528061b6942c0bb9ce2e60d71dab9e22200b03fd7c21da5
+a9cd86d154c1dd12ce63cf92bc82a118465809fcb7fc20afa460cf9f0d6724c0
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.FileListAbsolute.txt b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.FileListAbsolute.txt
index e5b241e..de27bea 100644
--- a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.FileListAbsolute.txt
+++ b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.csproj.FileListAbsolute.txt
@@ -16,3 +16,6 @@ E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.AspNetCore\obj\Debug\net10.0\Captch
 E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.AspNetCore\obj\Debug\net10.0\refint\CaptchaKit.AspNetCore.dll
 E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.AspNetCore\obj\Debug\net10.0\CaptchaKit.AspNetCore.pdb
 E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.AspNetCore\obj\Debug\net10.0\ref\CaptchaKit.AspNetCore.dll
+E:\jiaowu\.codex-build\captcha-types\Debug\net10.0\CaptchaKit.AspNetCore.deps.json
+E:\jiaowu\.codex-build\captcha-types\Debug\net10.0\CaptchaKit.AspNetCore.dll
+E:\jiaowu\.codex-build\captcha-types\Debug\net10.0\CaptchaKit.AspNetCore.pdb
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.dll
index a67447f..3be5f37 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.pdb b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.pdb
index 479d532..342a9c4 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.pdb and b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/CaptchaKit.AspNetCore.pdb differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/ref/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/ref/CaptchaKit.AspNetCore.dll
index 4194c7b..b099e72 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/ref/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/ref/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/refint/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/refint/CaptchaKit.AspNetCore.dll
index 4194c7b..b099e72 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/refint/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/obj/Debug/net10.0/refint/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/CaptchaKit.AspNetCore.0.1.0-preview.1.nuspec b/src/CaptchaKit.AspNetCore/obj/Release/CaptchaKit.AspNetCore.0.1.0-preview.1.nuspec
index 5421b90..e55143e 100644
--- a/src/CaptchaKit.AspNetCore/obj/Release/CaptchaKit.AspNetCore.0.1.0-preview.1.nuspec
+++ b/src/CaptchaKit.AspNetCore/obj/Release/CaptchaKit.AspNetCore.0.1.0-preview.1.nuspec
@@ -9,7 +9,7 @@
     <readme>README.md</readme>
     <description>ASP.NET Core and distributed-cache integration for CaptchaKit.</description>
     <tags>captcha security bot-protection aspnetcore</tags>
-    <repository type="git" commit="149eb66890ce8ac96fae9a9b7e7f6c09bb0d0269" />
+    <repository type="git" commit="0631f17bf5ed33b67f1af0648d13aedcff701607" />
     <dependencies>
       <group targetFramework="net10.0">
         <dependency id="CaptchaKit.Core" version="0.1.0-preview.1" exclude="Build,Analyzers" />
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/CaptchaKit.AspNetCore.0.1.0-preview.2.nuspec b/src/CaptchaKit.AspNetCore/obj/Release/CaptchaKit.AspNetCore.0.1.0-preview.2.nuspec
new file mode 100644
index 0000000..f297b7f
--- /dev/null
+++ b/src/CaptchaKit.AspNetCore/obj/Release/CaptchaKit.AspNetCore.0.1.0-preview.2.nuspec
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
+  <metadata>
+    <id>CaptchaKit.AspNetCore</id>
+    <version>0.1.0-preview.2</version>
+    <authors>CaptchaKit Contributors</authors>
+    <license type="expression">MIT</license>
+    <licenseUrl>https://licenses.nuget.org/MIT</licenseUrl>
+    <readme>README.md</readme>
+    <description>ASP.NET Core and distributed-cache integration for CaptchaKit.</description>
+    <tags>captcha security bot-protection aspnetcore</tags>
+    <repository type="git" commit="0631f17bf5ed33b67f1af0648d13aedcff701607" />
+    <dependencies>
+      <group targetFramework="net10.0">
+        <dependency id="CaptchaKit.Core" version="0.1.0-preview.2" exclude="Build,Analyzers" />
+        <dependency id="SkiaSharp" version="4.151.1" exclude="Build,Analyzers" />
+      </group>
+    </dependencies>
+    <frameworkReferences>
+      <group targetFramework="net10.0">
+        <frameworkReference name="Microsoft.AspNetCore.App" />
+      </group>
+    </frameworkReferences>
+  </metadata>
+  <files>
+    <file src="E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.AspNetCore\bin\Release\net10.0\CaptchaKit.AspNetCore.dll" target="lib\net10.0\CaptchaKit.AspNetCore.dll" />
+    <file src="E:\jiaowu\packages\CaptchaKit\README.md" target="\README.md" />
+    <file src="E:\jiaowu\packages\CaptchaKit\LICENSE" target="\LICENSE" />
+  </files>
+</package>
\ No newline at end of file
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs
index dfb984d..798bedc 100644
--- a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs
+++ b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Release")]
 [assembly: System.Reflection.AssemblyDescriptionAttribute("ASP.NET Core and distributed-cache integration for CaptchaKit.")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("0.1.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.1+149eb66890ce8ac96fae9a9b7e7f6c09bb0d0269")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.2+0631f17bf5ed33b67f1af0648d13aedcff701607")]
 [assembly: System.Reflection.AssemblyProductAttribute("CaptchaKit.AspNetCore")]
 [assembly: System.Reflection.AssemblyTitleAttribute("CaptchaKit.AspNetCore")]
 [assembly: System.Reflection.AssemblyVersionAttribute("0.1.0.0")]
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache
index a1a9db0..927e347 100644
--- a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache
+++ b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.AssemblyInfoInputs.cache
@@ -1 +1 @@
-5a49e578d7a15eae0f7993f7aa6de454d706a857e5e9dce58e6f3480258f8aa1
+977d81336550e4fd826b23bfebdb87d6abd1ce1abcf6fe7a67fd6ddcadc17e33
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache
index b54d075..d63d8e8 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache and b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.csproj.AssemblyReference.cache differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.dll
index 60966b6..6258d2f 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.pdb b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.pdb
index 00afd26..f144c0d 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.pdb and b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/CaptchaKit.AspNetCore.pdb differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/ref/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/ref/CaptchaKit.AspNetCore.dll
index 492bd6f..2a598ab 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/ref/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/ref/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/refint/CaptchaKit.AspNetCore.dll b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/refint/CaptchaKit.AspNetCore.dll
index 492bd6f..2a598ab 100644
Binary files a/src/CaptchaKit.AspNetCore/obj/Release/net10.0/refint/CaptchaKit.AspNetCore.dll and b/src/CaptchaKit.AspNetCore/obj/Release/net10.0/refint/CaptchaKit.AspNetCore.dll differ
diff --git a/src/CaptchaKit.AspNetCore/obj/project.assets.json b/src/CaptchaKit.AspNetCore/obj/project.assets.json
index c002d16..e880699 100644
--- a/src/CaptchaKit.AspNetCore/obj/project.assets.json
+++ b/src/CaptchaKit.AspNetCore/obj/project.assets.json
@@ -67,7 +67,7 @@
           }
         }
       },
-      "CaptchaKit.Core/0.1.0-preview.1": {
+      "CaptchaKit.Core/0.1.0-preview.2": {
         "type": "project",
         "framework": ".NETCoreApp,Version=v10.0",
         "compile": {
@@ -227,7 +227,7 @@
         "skiasharp.nativeassets.win32.nuspec"
       ]
     },
-    "CaptchaKit.Core/0.1.0-preview.1": {
+    "CaptchaKit.Core/0.1.0-preview.2": {
       "type": "project",
       "path": "../CaptchaKit.Core/CaptchaKit.Core.csproj",
       "msbuildProject": "../CaptchaKit.Core/CaptchaKit.Core.csproj"
@@ -235,7 +235,7 @@
   },
   "projectFileDependencyGroups": {
     "net10.0": [
-      "CaptchaKit.Core >= 0.1.0-preview.1",
+      "CaptchaKit.Core >= 0.1.0-preview.2",
       "SkiaSharp >= 4.151.1"
     ]
   },
@@ -244,7 +244,7 @@
     "D:\\Microsoft Visual Studio\\Shared\\NuGetPackages": {}
   },
   "project": {
-    "version": "0.1.0-preview.1",
+    "version": "0.1.0-preview.2",
     "restore": {
       "projectUniqueName": "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.AspNetCore\\CaptchaKit.AspNetCore.csproj",
       "projectName": "CaptchaKit.AspNetCore",
diff --git a/src/CaptchaKit.AspNetCore/obj/project.nuget.cache b/src/CaptchaKit.AspNetCore/obj/project.nuget.cache
index eb05013..b24dcf8 100644
--- a/src/CaptchaKit.AspNetCore/obj/project.nuget.cache
+++ b/src/CaptchaKit.AspNetCore/obj/project.nuget.cache
@@ -1,6 +1,6 @@
 {
   "version": 2,
-  "dgSpecHash": "u7gy0hXdqX8=",
+  "dgSpecHash": "ARNDBHvT8jU=",
   "success": true,
   "projectFilePath": "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.AspNetCore\\CaptchaKit.AspNetCore.csproj",
   "expectedPackageFiles": [
diff --git a/src/CaptchaKit.Core/CaptchaContracts.cs b/src/CaptchaKit.Core/CaptchaContracts.cs
index aa6891c..f63f342 100644
--- a/src/CaptchaKit.Core/CaptchaContracts.cs
+++ b/src/CaptchaKit.Core/CaptchaContracts.cs
@@ -1,10 +1,22 @@
 namespace CaptchaKit;
 
+public enum CaptchaChallengeType
+{
+    TextImage,
+    Selection,
+    OneClick
+}
+
+public sealed record CaptchaChoice(string Id, string Label);
+
 public sealed record CaptchaChallenge(
     string Id,
-    string ContentType,
-    byte[] ImageBytes,
-    DateTimeOffset ExpiresAt);
+    CaptchaChallengeType Type,
+    DateTimeOffset ExpiresAt,
+    string? Prompt = null,
+    IReadOnlyList<CaptchaChoice>? Choices = null,
+    string? ContentType = null,
+    byte[]? ImageBytes = null);
 
 public sealed record CaptchaGenerationRequest(
     string Id,
@@ -15,6 +27,9 @@ public sealed record GeneratedCaptcha(
     CaptchaChallenge Challenge,
     string Answer);
 
+/// <summary>Opaque, client-generated browser evidence for binding a challenge to its requester.</summary>
+public sealed record CaptchaRequestContext(string? BrowserProof = null);
+
 public interface ICaptchaGenerator
 {
     GeneratedCaptcha Generate(CaptchaGenerationRequest request);
diff --git a/src/CaptchaKit.Core/CaptchaKit.Core.csproj b/src/CaptchaKit.Core/CaptchaKit.Core.csproj
index 3db18c4..4d71f40 100644
--- a/src/CaptchaKit.Core/CaptchaKit.Core.csproj
+++ b/src/CaptchaKit.Core/CaptchaKit.Core.csproj
@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <PackageId>CaptchaKit.Core</PackageId>
-    <Version>0.1.0-preview.1</Version>
+    <Version>0.1.0-preview.2</Version>
     <Authors>CaptchaKit Contributors</Authors>
     <Description>Provider-neutral, server-validated CAPTCHA challenge contracts.</Description>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
diff --git a/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.dll b/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.dll
index d073b38..4141e32 100644
Binary files a/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.pdb b/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.pdb
index 4f2084a..ba1cdc2 100644
Binary files a/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.pdb and b/src/CaptchaKit.Core/bin/Debug/net10.0/CaptchaKit.Core.pdb differ
diff --git a/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.deps.json b/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.deps.json
index fe0c142..86ca2cc 100644
--- a/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.deps.json
+++ b/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.deps.json
@@ -6,7 +6,7 @@
   "compilationOptions": {},
   "targets": {
     ".NETCoreApp,Version=v10.0": {
-      "CaptchaKit.Core/0.1.0-preview.1": {
+      "CaptchaKit.Core/0.1.0-preview.2": {
         "runtime": {
           "CaptchaKit.Core.dll": {}
         }
@@ -14,7 +14,7 @@
     }
   },
   "libraries": {
-    "CaptchaKit.Core/0.1.0-preview.1": {
+    "CaptchaKit.Core/0.1.0-preview.2": {
       "type": "project",
       "serviceable": false,
       "sha512": ""
diff --git a/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.dll b/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.dll
index 287b455..26ed172 100644
Binary files a/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.pdb b/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.pdb
index 305b8a2..e013d72 100644
Binary files a/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.pdb and b/src/CaptchaKit.Core/bin/Release/net10.0/CaptchaKit.Core.pdb differ
diff --git a/src/CaptchaKit.Core/obj/CaptchaKit.Core.csproj.nuget.dgspec.json b/src/CaptchaKit.Core/obj/CaptchaKit.Core.csproj.nuget.dgspec.json
index bf92128..d908f37 100644
--- a/src/CaptchaKit.Core/obj/CaptchaKit.Core.csproj.nuget.dgspec.json
+++ b/src/CaptchaKit.Core/obj/CaptchaKit.Core.csproj.nuget.dgspec.json
@@ -5,7 +5,7 @@
   },
   "projects": {
     "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.Core\\CaptchaKit.Core.csproj": {
-      "version": "0.1.0-preview.1",
+      "version": "0.1.0-preview.2",
       "restore": {
         "projectUniqueName": "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.Core\\CaptchaKit.Core.csproj",
         "projectName": "CaptchaKit.Core",
diff --git a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfo.cs b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfo.cs
index 79ff4c3..7241f4b 100644
--- a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfo.cs
+++ b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyDescriptionAttribute("Provider-neutral, server-validated CAPTCHA challenge contracts.")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("0.1.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.1+149eb66890ce8ac96fae9a9b7e7f6c09bb0d0269")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.1+0631f17bf5ed33b67f1af0648d13aedcff701607")]
 [assembly: System.Reflection.AssemblyProductAttribute("CaptchaKit.Core")]
 [assembly: System.Reflection.AssemblyTitleAttribute("CaptchaKit.Core")]
 [assembly: System.Reflection.AssemblyVersionAttribute("0.1.0.0")]
diff --git a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache
index 4423211..7365933 100644
--- a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache
+++ b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache
@@ -1 +1 @@
-e6e151a16c76134fdb273bc2637b41a772b28355ecdf40a8e3d03bcba4922ce3
+9c76bbacb071eed86264625c8c182905601fc858fd36c6c66682006282d3aaff
diff --git a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.csproj.FileListAbsolute.txt b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.csproj.FileListAbsolute.txt
index 0f87450..328e38c 100644
--- a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.csproj.FileListAbsolute.txt
+++ b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.csproj.FileListAbsolute.txt
@@ -12,3 +12,6 @@ E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.Core\obj\Debug\net10.0\CaptchaKit.C
 E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.Core\obj\Debug\net10.0\refint\CaptchaKit.Core.dll
 E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.Core\obj\Debug\net10.0\CaptchaKit.Core.pdb
 E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.Core\obj\Debug\net10.0\ref\CaptchaKit.Core.dll
+E:\jiaowu\.codex-build\captcha-types\Debug\net10.0\CaptchaKit.Core.deps.json
+E:\jiaowu\.codex-build\captcha-types\Debug\net10.0\CaptchaKit.Core.dll
+E:\jiaowu\.codex-build\captcha-types\Debug\net10.0\CaptchaKit.Core.pdb
diff --git a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.dll b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.dll
index d073b38..1239d1e 100644
Binary files a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.pdb b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.pdb
index 4f2084a..5222e8a 100644
Binary files a/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.pdb and b/src/CaptchaKit.Core/obj/Debug/net10.0/CaptchaKit.Core.pdb differ
diff --git a/src/CaptchaKit.Core/obj/Debug/net10.0/ref/CaptchaKit.Core.dll b/src/CaptchaKit.Core/obj/Debug/net10.0/ref/CaptchaKit.Core.dll
index 4f43b50..4e3fbee 100644
Binary files a/src/CaptchaKit.Core/obj/Debug/net10.0/ref/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/obj/Debug/net10.0/ref/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/obj/Debug/net10.0/refint/CaptchaKit.Core.dll b/src/CaptchaKit.Core/obj/Debug/net10.0/refint/CaptchaKit.Core.dll
index 4f43b50..4e3fbee 100644
Binary files a/src/CaptchaKit.Core/obj/Debug/net10.0/refint/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/obj/Debug/net10.0/refint/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/obj/Release/CaptchaKit.Core.0.1.0-preview.1.nuspec b/src/CaptchaKit.Core/obj/Release/CaptchaKit.Core.0.1.0-preview.1.nuspec
index c701fc4..bd69b12 100644
--- a/src/CaptchaKit.Core/obj/Release/CaptchaKit.Core.0.1.0-preview.1.nuspec
+++ b/src/CaptchaKit.Core/obj/Release/CaptchaKit.Core.0.1.0-preview.1.nuspec
@@ -9,7 +9,7 @@
     <readme>README.md</readme>
     <description>Provider-neutral, server-validated CAPTCHA challenge contracts.</description>
     <tags>captcha security bot-protection aspnetcore</tags>
-    <repository type="git" commit="149eb66890ce8ac96fae9a9b7e7f6c09bb0d0269" />
+    <repository type="git" commit="0631f17bf5ed33b67f1af0648d13aedcff701607" />
     <dependencies>
       <group targetFramework="net10.0" />
     </dependencies>
diff --git a/src/CaptchaKit.Core/obj/Release/CaptchaKit.Core.0.1.0-preview.2.nuspec b/src/CaptchaKit.Core/obj/Release/CaptchaKit.Core.0.1.0-preview.2.nuspec
new file mode 100644
index 0000000..b378bf1
--- /dev/null
+++ b/src/CaptchaKit.Core/obj/Release/CaptchaKit.Core.0.1.0-preview.2.nuspec
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
+  <metadata>
+    <id>CaptchaKit.Core</id>
+    <version>0.1.0-preview.2</version>
+    <authors>CaptchaKit Contributors</authors>
+    <license type="expression">MIT</license>
+    <licenseUrl>https://licenses.nuget.org/MIT</licenseUrl>
+    <readme>README.md</readme>
+    <description>Provider-neutral, server-validated CAPTCHA challenge contracts.</description>
+    <tags>captcha security bot-protection aspnetcore</tags>
+    <repository type="git" commit="0631f17bf5ed33b67f1af0648d13aedcff701607" />
+    <dependencies>
+      <group targetFramework="net10.0" />
+    </dependencies>
+  </metadata>
+  <files>
+    <file src="E:\jiaowu\packages\CaptchaKit\src\CaptchaKit.Core\bin\Release\net10.0\CaptchaKit.Core.dll" target="lib\net10.0\CaptchaKit.Core.dll" />
+    <file src="E:\jiaowu\packages\CaptchaKit\README.md" target="\README.md" />
+    <file src="E:\jiaowu\packages\CaptchaKit\LICENSE" target="\LICENSE" />
+  </files>
+</package>
\ No newline at end of file
diff --git a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfo.cs b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfo.cs
index 95e3ca1..2de54bc 100644
--- a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfo.cs
+++ b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Release")]
 [assembly: System.Reflection.AssemblyDescriptionAttribute("Provider-neutral, server-validated CAPTCHA challenge contracts.")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("0.1.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.1+149eb66890ce8ac96fae9a9b7e7f6c09bb0d0269")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("0.1.0-preview.2+0631f17bf5ed33b67f1af0648d13aedcff701607")]
 [assembly: System.Reflection.AssemblyProductAttribute("CaptchaKit.Core")]
 [assembly: System.Reflection.AssemblyTitleAttribute("CaptchaKit.Core")]
 [assembly: System.Reflection.AssemblyVersionAttribute("0.1.0.0")]
diff --git a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache
index 44f358c..5db14d5 100644
--- a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache
+++ b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.AssemblyInfoInputs.cache
@@ -1 +1 @@
-f5e5ed532953f371305e8c777d286c88bdbb56873842007cb8191b6a3891c151
+fdb26d0863ff3967916fc8431513437e13058a70628aea97b54750c0adb63519
diff --git a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.dll b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.dll
index 287b455..26ed172 100644
Binary files a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.pdb b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.pdb
index 305b8a2..e013d72 100644
Binary files a/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.pdb and b/src/CaptchaKit.Core/obj/Release/net10.0/CaptchaKit.Core.pdb differ
diff --git a/src/CaptchaKit.Core/obj/Release/net10.0/ref/CaptchaKit.Core.dll b/src/CaptchaKit.Core/obj/Release/net10.0/ref/CaptchaKit.Core.dll
index 78ea412..7e5152e 100644
Binary files a/src/CaptchaKit.Core/obj/Release/net10.0/ref/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/obj/Release/net10.0/ref/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/obj/Release/net10.0/refint/CaptchaKit.Core.dll b/src/CaptchaKit.Core/obj/Release/net10.0/refint/CaptchaKit.Core.dll
index 78ea412..7e5152e 100644
Binary files a/src/CaptchaKit.Core/obj/Release/net10.0/refint/CaptchaKit.Core.dll and b/src/CaptchaKit.Core/obj/Release/net10.0/refint/CaptchaKit.Core.dll differ
diff --git a/src/CaptchaKit.Core/obj/project.assets.json b/src/CaptchaKit.Core/obj/project.assets.json
index 66f3581..5f889ea 100644
--- a/src/CaptchaKit.Core/obj/project.assets.json
+++ b/src/CaptchaKit.Core/obj/project.assets.json
@@ -12,7 +12,7 @@
     "D:\\Microsoft Visual Studio\\Shared\\NuGetPackages": {}
   },
   "project": {
-    "version": "0.1.0-preview.1",
+    "version": "0.1.0-preview.2",
     "restore": {
       "projectUniqueName": "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.Core\\CaptchaKit.Core.csproj",
       "projectName": "CaptchaKit.Core",
diff --git a/src/CaptchaKit.Core/obj/project.nuget.cache b/src/CaptchaKit.Core/obj/project.nuget.cache
index 332faef..572c0a4 100644
--- a/src/CaptchaKit.Core/obj/project.nuget.cache
+++ b/src/CaptchaKit.Core/obj/project.nuget.cache
@@ -1,6 +1,6 @@
 {
   "version": 2,
-  "dgSpecHash": "QStWuwhtXkM=",
+  "dgSpecHash": "BM4FEkFefHE=",
   "success": true,
   "projectFilePath": "E:\\jiaowu\\packages\\CaptchaKit\\src\\CaptchaKit.Core\\CaptchaKit.Core.csproj",
   "expectedPackageFiles": [],