AgentEval 0.12.2-beta

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher.
This is a prerelease version of AgentEval. 
dotnet add package AgentEval --version 0.12.2-beta
                    


                    

                
NuGet\Install-Package AgentEval -Version 0.12.2-beta
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="AgentEval" Version="0.12.2-beta" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="AgentEval" Version="0.12.2-beta" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="AgentEval" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add AgentEval --version 0.12.2-beta
                    


                    

                
#r "nuget: AgentEval, 0.12.2-beta"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package AgentEval@0.12.2-beta
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=AgentEval&version=0.12.2-beta&prerelease
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=AgentEval&version=0.12.2-beta&prerelease
                    


                            Install as a Cake Tool

AgentEval

The .NET Evaluation Toolkit for AI Agents

Built first for Microsoft Agent Framework (MAF) and Microsoft.Extensions.AI. What RAGAS and DeepEval do for Python, AgentEval does for .NET.

Features

  • 🎯 Tool Tracking β€” Monitor tool/function calls with timing, arguments, and ordering
  • βœ… Fluent Assertions β€” Expressive assertions with rich failure messages, because reasons, and assertion scopes
  • πŸ“Š Performance Metrics β€” TTFT, latency, tokens, cost estimation for 8+ models
  • πŸ”¬ RAG Metrics β€” Faithfulness, relevance, context precision/recall, answer correctness
  • πŸ›‘οΈ Red Team Security β€” 13 attack types, 258 probes, full OWASP LLM Top 10 coverage
  • βš–οΈ Responsible AI β€” Toxicity, bias, and misinformation detection metrics
  • πŸ“ˆ Stochastic Evaluation β€” Statistical model comparison with multi-run analysis
  • πŸ”„ Trace Record & Replay β€” Deterministic CI testing without LLM calls
  • 🎯 Calibrated Evaluator β€” Multi-model consensus-driven scoring
  • πŸ”Œ Extensible β€” Adapter pattern for any agent framework

Quick Start

using AgentEval;
using AgentEval.MAF;
using AgentEval.Assertions;

// Create evaluation harness
var harness = new MAFEvaluationHarness(evaluatorClient);

// Run evaluation with tool tracking
var result = await harness.RunEvaluationAsync(agent, new TestCase
{
    Name = "Feature Planning Test",
    Input = "Plan a user authentication feature",
    EvaluationCriteria = ["Should include security considerations"]
});

// Assert tool usage with "because" reasons
result.ToolUsage!
    .Should()
    .HaveCalledTool("SecurityTool", because: "auth features require security review")
        .BeforeTool("FeatureTool")
        .WithoutError()
    .And()
    .HaveNoErrors();

// Assert performance
result.Performance!
    .Should()
    .HaveTotalDurationUnder(TimeSpan.FromSeconds(10))
    .HaveEstimatedCostUnder(0.10m);

Red Team Security Scanning

var result = await AttackPipeline.Create()
    .WithAllAttacks()
    .ScanAsync(agent);

result.Should().HaveOverallScoreAbove(85);
result.ExportAsync("security-report.sarif", ExportFormat.Sarif);

Trace Record & Replay

Capture agent executions for deterministic replay β€” no LLM calls needed in CI:

// Record
await using var recorder = new TraceRecordingAgent(realAgent, "weather_test");
var response = await recorder.InvokeAsync("What's the weather?");
await TraceSerializer.SaveToFileAsync(recorder.Trace, "trace.json");

// Replay (deterministic, free)
var trace = await TraceSerializer.LoadFromFileAsync("trace.json");
var replayer = new TraceReplayingAgent(trace);
var replayed = await replayer.InvokeAsync("What's the weather?");

Model Comparison

var result = await comparer.CompareModelsAsync(
    factories: [gpt4oFactory, gpt4oMiniFactory],
    testCases: testSuite,
    options: new ComparisonOptions(RunsPerModel: 5));

Console.WriteLine(result.ToMarkdown());

Quality Assurance

  • Comprehensive evaluation suite targeting net8.0, net9.0, and net10.0
  • All evaluations passing βœ…

Installation

dotnet add package AgentEval --prerelease

Single package, modular internals β€” AgentEval ships as one NuGet package containing 6 focused assemblies:

  • AgentEval.Abstractions β€” Public contracts and interfaces
  • AgentEval.Core β€” Metrics, assertions, comparison, tracing
  • AgentEval.DataLoaders β€” Data loading and export (JSON, YAML, CSV, JSONL)
  • AgentEval.MAF β€” Microsoft Agent Framework integration
  • AgentEval.RedTeam β€” Security testing (multiple attack types and probes)

Service Registration

// Register all services at once (recommended):
services.AddAgentEvalAll();

// Or register selectively:
services.AddAgentEval();              // Core services only
services.AddAgentEvalDataLoaders();   // DataLoaders + Exporters
services.AddAgentEvalRedTeam();       // Red Team security testing

Documentation

License

MIT License β€” See LICENSE for details.

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
0.12.2-beta 43 6/18/2026
0.12.1-beta 43 6/18/2026
0.12.0-beta 53 6/14/2026
0.10.1-beta 440 5/18/2026
0.10.0-beta 91 5/17/2026
0.9.0-beta 66 5/17/2026
0.8.1-beta 724 4/29/2026
0.8.0-beta 70 4/28/2026
0.6.0-beta 1,659 3/5/2026
0.5.4-beta 108 3/3/2026
0.5.3-beta 132 3/1/2026
0.5.2-beta 106 2/28/2026
0.5.1-beta 98 2/28/2026
0.4.0-beta 114 2/22/2026
0.3.0-beta 149 1/25/2026
0.2.1-beta 88 1/24/2026
0.2.0-beta 89 1/18/2026
0.1.1-alpha 98 1/3/2026
0.1.0-alpha 90 1/3/2026

Per-version release notes: https://github.com/AgentEvalHQ/AgentEval/blob/main/CHANGELOG.md