csharpfritz/aspire-minecraft/aspire-dashboard-commands

var api = builder.AddProject<Projects.MyService>("api")
    .WithHttpHealthCheck("/health")  // Enable Aspire health polling
    .WithHttpCommand("/my-endpoint", "Button Label",
        commandName: "my-command",
        commandOptions: new HttpCommandOptions
        {
            IconName = "ErrorCircle",           // FluentUI icon name
            IconVariant = IconVariant.Filled,    // Regular or Filled
            Description = "Tooltip text",
            ConfirmationMessage = "Are you sure?",
            IsHighlighted = true,               // Makes button prominent
            // Method defaults to POST — set explicitly for GET:
            // Method = HttpMethod.Get,
        });

app.MapPost("/my-endpoint", () =>
{
    // Do the thing
    return Results.Ok(new { message = "Done" });
});

// DON'T — WithHttpCommand handles endpoint resolution for you
.WithCommand("my-cmd", "Button", async context =>
{
    var client = new HttpClient();
    // Manually resolve endpoint URL... error-prone
    await client.PostAsync(url, null);
    return CommandResults.Success();
});