Replace JSON.NET with System.Text.Json across the codebase

AGENTS.md

@@ -59,6 +59,7 @@ Available in `.claude/agents/`. Use `@agent-name` to invoke:
 - Prefer additive documentation updates — don't replace strategic docs wholesale, extend them
 - **Backwards compatibility:** Never break existing public APIs, WebSocket message formats, config keys, or exported library interfaces without explicit user approval. Call out any breaking change as a BLOCKER in reviews.
 - **API test files:** Update `tests/http/*.http` files whenever endpoints change (new, modified, or removed).
+- **Abbreviations:** Never abbreviate `Organization` as `org` in code (variable names, parameters, method names, or comments). Always spell out `organization`.
 - **PR descriptions:** When creating a PR, fill out any existing PR template. Provide concise context: what changed, why, new APIs/features/behaviors, and any breaking changes. No essays — just enough for reviewers to understand the value and impact.
 - **App URL for QA:** `http://localhost:7110` — probe `/api/v2/about` for health check.
 - **Never test against production:** Always dogfood, QA test, and run API smoke tests against `localhost` only. Never use production URLs (e.g., `be.exceptionless.io`) in scripts, tests, or browser automation. Start the app locally via `aspire run` or the AppHost before testing.

src/Exceptionless.AppHost/Exceptionless.AppHost.csproj

@@ -8,6 +8,7 @@
     <NoWarn>$(NoWarn);ASPIRECERTIFICATES001</NoWarn>
   </PropertyGroup>
   <ItemGroup>
+    <PackageReference Include="Elastic.Clients.Elasticsearch" Version="8.19.21" />
     <PackageReference Include="Aspire.Hosting.Azure.Storage" Version="13.3.0" />
     <PackageReference Include="Aspire.Hosting.Browsers" Version="13.3.0-preview.1.26256.5" />
     <PackageReference Include="Aspire.Hosting.JavaScript" Version="13.3.0" />

src/Exceptionless.AppHost/Extensions/ElasticsearchExtensions.cs

@@ -1,4 +1,4 @@
-using HealthChecks.Elasticsearch;
+using Elastic.Clients.Elasticsearch;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Diagnostics.HealthChecks;
 
@@ -27,7 +27,6 @@ public static IResourceBuilder<ElasticsearchResource> AddElasticsearch(this IDis
         var elasticsearch = new ElasticsearchResource(name);
 
         string? connectionString = null;
-        ElasticsearchOptions? options = null;
 
         builder.Eventing.Subscribe<ConnectionStringAvailableEvent>(elasticsearch, async (@event, ct) =>
         {
@@ -36,16 +35,13 @@ public static IResourceBuilder<ElasticsearchResource> AddElasticsearch(this IDis
             {
                 throw new DistributedApplicationException($"ConnectionStringAvailableEvent was published for the '{elasticsearch.Name}' resource but the connection string was null.");
             }
-
-            options = new ElasticsearchOptions();
-            options.UseServer(connectionString);
         });
 
         string healthCheckKey = $"{name}_check";
         builder.Services.AddHealthChecks()
           .Add(new HealthCheckRegistration(
               healthCheckKey,
-              sp => new ElasticsearchHealthCheck(options!),
+              sp => new ElasticsearchConnectionHealthCheck(() => connectionString),
               failureStatus: null,
               tags: null,
               timeout: null));
@@ -127,3 +123,19 @@ internal static class ElasticsearchContainerImageTags
     public const string KibanaImage = "kibana/kibana";
     public const string Tag = "8.19.15";
 }
+
+internal sealed class ElasticsearchConnectionHealthCheck(Func<string?> connectionStringFactory) : IHealthCheck
+{
+    public async Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default)
+    {
+        var connectionString = connectionStringFactory();
+        if (string.IsNullOrEmpty(connectionString))
+            return new HealthCheckResult(context.Registration.FailureStatus, "Connection string not available.");
+
+        var client = new ElasticsearchClient(new Uri(connectionString));
+        var response = await client.PingAsync(cancellationToken);
+        return response.IsValidResponse
+            ? HealthCheckResult.Healthy()
+            : new HealthCheckResult(context.Registration.FailureStatus, $"Elasticsearch ping failed: {response.DebugInformation}");
+    }
+}

src/Exceptionless.Core/Bootstrapper.cs

@@ -1,4 +1,5 @@
 using System.Text.Json;
+using Elastic.Clients.Elasticsearch;
 using Exceptionless.Core.Authentication;
 using Exceptionless.Core.Billing;
 using Exceptionless.Core.Configuration;
@@ -7,7 +8,6 @@
 using Exceptionless.Core.Jobs;
 using Exceptionless.Core.Jobs.WorkItemHandlers;
 using Exceptionless.Core.Mail;
-using Exceptionless.Core.Models;
 using Exceptionless.Core.Models.WorkItems;
 using Exceptionless.Core.Pipeline;
 using Exceptionless.Core.Plugins;
@@ -24,7 +24,6 @@
 using Exceptionless.Core.Services;
 using Exceptionless.Core.Utility;
 using Exceptionless.Core.Validation;
-using Exceptionless.Serializer;
 using Foundatio.Caching;
 using Foundatio.Extensions.Hosting.Jobs;
 using Foundatio.Extensions.Hosting.Startup;
@@ -43,7 +42,6 @@
 using Foundatio.Storage;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
-using DataDictionary = Exceptionless.Core.Models.DataDictionary;
 using MaintainIndexesJob = Foundatio.Repositories.Elasticsearch.Jobs.MaintainIndexesJob;
 
 namespace Exceptionless.Core;
@@ -52,27 +50,7 @@ public class Bootstrapper
 {
     public static void RegisterServices(IServiceCollection services, AppOptions appOptions)
     {
-        // PERF: Work towards getting rid of JSON.NET.
-        Newtonsoft.Json.JsonConvert.DefaultSettings = () => new Newtonsoft.Json.JsonSerializerSettings
-        {
-            DateParseHandling = Newtonsoft.Json.DateParseHandling.DateTimeOffset
-        };
-
-        services.AddSingleton<Newtonsoft.Json.Serialization.IContractResolver>(_ => GetJsonContractResolver());
-        services.AddSingleton<Newtonsoft.Json.JsonSerializerSettings>(s =>
-        {
-            // NOTE: These settings may need to be synced in the Elastic Configuration.
-            var settings = new Newtonsoft.Json.JsonSerializerSettings
-            {
-                MissingMemberHandling = Newtonsoft.Json.MissingMemberHandling.Ignore,
-                DateParseHandling = Newtonsoft.Json.DateParseHandling.DateTimeOffset,
-                ContractResolver = s.GetRequiredService<Newtonsoft.Json.Serialization.IContractResolver>()
-            };
-
-            settings.AddModelConverters(s.GetRequiredService<ILogger<Bootstrapper>>());
-            return settings;
-        });
-
+        // Register System.Text.Json options with Exceptionless defaults (snake_case, null handling)
         services.AddSingleton(_ => new JsonSerializerOptions().ConfigureExceptionlessDefaults());
 
         services.AddSingleton<ISerializer>(s => s.GetRequiredService<ITextSerializer>());
@@ -90,7 +68,7 @@ public static void RegisterServices(IServiceCollection services, AppOptions appO
         }));
 
         services.AddSingleton<ExceptionlessElasticConfiguration>();
-        services.AddSingleton<Nest.IElasticClient>(s => s.GetRequiredService<ExceptionlessElasticConfiguration>().Client);
+        services.AddSingleton<ElasticsearchClient>(s => s.GetRequiredService<ExceptionlessElasticConfiguration>().Client);
         services.AddSingleton<IElasticConfiguration>(s => s.GetRequiredService<ExceptionlessElasticConfiguration>());
         services.AddStartupAction<ExceptionlessElasticConfiguration>();
 
@@ -279,13 +257,6 @@ public static void AddHostedJobs(IServiceCollection services, ILoggerFactory log
         logger.LogWarning("Jobs running in process");
     }
 
-    public static DynamicTypeContractResolver GetJsonContractResolver()
-    {
-        var resolver = new DynamicTypeContractResolver(new LowerCaseUnderscorePropertyNamesContractResolver());
-        resolver.UseDefaultResolverFor(typeof(DataDictionary), typeof(SettingsDictionary), typeof(VersionOnePlugin.VersionOneWebHookStack), typeof(VersionOnePlugin.VersionOneWebHookEvent));
-        return resolver;
-    }
-
     private static IQueue<T> CreateQueue<T>(IServiceProvider container, TimeSpan? workItemTimeout = null) where T : class
     {
         var loggerFactory = container.GetRequiredService<ILoggerFactory>();

src/Exceptionless.Core/Exceptionless.Core.csproj

@@ -23,9 +23,7 @@
     <PackageReference Include="Exceptionless.DateTimeExtensions" Version="6.0.1" />
     <PackageReference Include="Exceptionless.RandomData" Version="2.0.1" />
     <PackageReference Include="Foundatio.Extensions.Hosting" Version="13.0.1" />
-    <PackageReference Include="Foundatio.JsonNet" Version="13.0.1" />
     <PackageReference Include="MiniValidation" Version="0.10.0" />
-    <PackageReference Include="NEST.JsonNetSerializer" Version="7.17.5" />
     <PackageReference Include="Handlebars.Net" Version="2.1.6" />
     <PackageReference Include="McSherry.SemanticVersioning" Version="1.4.1" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.7" />
@@ -34,9 +32,7 @@
     <PackageReference Include="Stripe.net" Version="51.1.0" />
     <PackageReference Include="System.DirectoryServices" Version="10.0.7" />
     <PackageReference Include="UAParser" Version="3.1.47" />
-    <PackageReference Include="Foundatio.Repositories.Elasticsearch" Version="7.18.2" Condition="'$(ReferenceFoundatioRepositoriesSource)' == '' OR '$(ReferenceFoundatioRepositoriesSource)' == 'false'" />
-    <ProjectReference
-      Include="..\..\..\..\Foundatio\Foundatio.Repositories\src\Foundatio.Repositories.Elasticsearch\Foundatio.Repositories.Elasticsearch.csproj"
-      Condition="'$(ReferenceFoundatioRepositoriesSource)' == 'true'" />
+    <PackageReference Include="Foundatio.Repositories.Elasticsearch" Version="8.0.0-preview.elastic-client.0.8" Condition="'$(ReferenceFoundatioRepositoriesSource)' == '' OR '$(ReferenceFoundatioRepositoriesSource)' == 'false'" />
+    <ProjectReference Include="..\..\..\..\Foundatio\Foundatio.Repositories\src\Foundatio.Repositories.Elasticsearch\Foundatio.Repositories.Elasticsearch.csproj" Condition="'$(ReferenceFoundatioRepositoriesSource)' == 'true'" />
   </ItemGroup>
 </Project>