Aspire Fit & Enablement Evaluator

Assess whether Aspire is appropriate for a project and provide implementation guidance.

Standalone Usage

Can be invoked directly:

•"Should I use Aspire for my project?"
•"What is Aspire and when should I use it?"
•"How do I set up Aspire for local development?"

What is Aspire?

Aspire is an opinionated stack for building distributed applications with:

When Aspire Fits (Strong Signals)

Signal	Why It Matters
Multi-service architecture	Aspire excels at orchestration
Complex local orchestration	Replaces docker-compose complexity
Need unified observability	Dashboard provides logs/traces/config
Service discovery needed	Automatic wiring between services
Team knows .NET	Leverages existing skills

When Aspire Doesn't Fit

Signal	Why
Single service/monolith	Overkill, adds complexity
Simple deps only	docker-compose is simpler
Team unfamiliar with .NET	Learning curve

What Aspire Provides

AppHost (Orchestration)

csharp

var builder = DistributedApplication.CreateBuilder(args);

// Add resources
var postgres = builder.AddPostgres("postgres")
    .AddDatabase("catalog");

var redis = builder.AddRedis("cache");

var rabbitmq = builder.AddRabbitMQ("messaging");

// Add services with references
builder.AddProject<Projects.CatalogApi>("catalog-api")
    .WithReference(postgres)
    .WithReference(redis);

builder.AddProject<Projects.OrdersApi>("orders-api")
    .WithReference(rabbitmq)
    .WithReference(redis);

builder.Build().Run();

Dashboard

•Logs: Structured logs from all services
•Traces: Distributed tracing (OTLP)
•Metrics: Service metrics
•Resources: Health and status of all components
•Config: Environment variables and settings

Built-in Components

Component	What It Does
PostgreSQL	Database with connection management
Redis	Caching with automatic configuration
RabbitMQ	Messaging with connection strings
Azure Storage	Blob, Queue, Table storage
SQL Server	Database integration
MongoDB	Document database
Kafka	Event streaming

Output Contract

yaml

aspire_assessment:
  project_description: "<what's being evaluated>"

  fit_score: "<strong|moderate|weak|not_applicable>"

  signals:
    multi_service: true|false
    dotnet_backend: true|false
    complex_orchestration: true|false
    need_observability: true|false
    service_count: <N>

  recommendation: "<use_aspire|consider_aspire|skip_aspire>"

  benefits:
    - "<benefit 1>"
    - "<benefit 2>"

  considerations:
    - "<consideration 1>"

  alternative: "<docker-compose|local-k8s|native>"
  alternative_reason: "<why alternative might be better>"

  implementation:
    steps:
      - "<step 1>"
      - "<step 2>"

    apphost_example: |
      <code example>

    commands:
      create: "dotnet new aspire-starter -n MyApp"
      run: "dotnet run --project MyApp.AppHost"
      mcp: "aspire mcp init"

Fit Score Criteria

Score	Criteria
strong	3+ .NET services, complex deps, need observability
moderate	2 .NET services, would benefit from dashboard
weak	Single service, simple deps
not_applicable	No .NET components

Quick Start

Create New Aspire Project

bash

# Create starter template
dotnet new aspire-starter -n MyApp

# Structure created:
# MyApp/
# ├── MyApp.AppHost/        # Orchestration
# ├── MyApp.ServiceDefaults/ # Shared config
# ├── MyApp.ApiService/     # Example API
# └── MyApp.Web/            # Example frontend

Add to Existing Project

bash

# Add AppHost project
dotnet new aspire-apphost -n MyApp.AppHost

# Add reference to existing service
cd MyApp.AppHost
dotnet add reference ../MyApp.Api/MyApp.Api.csproj

# Add ServiceDefaults to services
dotnet add ../MyApp.Api package Aspire.ServiceDefaults

Enable MCP

bash

# Initialize MCP support
aspire mcp init

# This enables AI assistants to interact with Aspire

Example Assessment

yaml

aspire_assessment:
  project_description: "E-commerce platform with 4 .NET services"

  fit_score: "strong"

  signals:
    multi_service: true
    dotnet_backend: true
    complex_orchestration: true
    need_observability: true
    service_count: 4

  recommendation: "use_aspire"

  benefits:
    - "Unified orchestration of all services"
    - "Built-in observability dashboard"
    - "Automatic service discovery"
    - "Simplified local development"
    - "Code-first infrastructure"

  considerations:
    - "Team needs basic Aspire knowledge"
    - "Adds dependency on Aspire packages"

  implementation:
    commands:
      create: "dotnet new aspire-apphost -n ECommerce.AppHost"
      run: "dotnet run --project ECommerce.AppHost"