Crestapps Core Aspnet Hosting

CrestApps.Core ASP.NET Hosting - Prompt Templates

Compose an ASP.NET Core Host

You are a CrestApps.Core expert. Put host services first, compose CrestApps through AddCrestAppsCore(...), then map only the endpoints and hubs for enabled features.

MVC

builder.Services.AddControllersWithViews()
    .AddCrestAppsStoreCommitterFilter();

builder.Services.AddCrestAppsCore(crestApps => crestApps
    .AddAISuite(ai => ai
        .AddOpenAI()
        .AddChatInteractions()
        .AddSignalR(addStoreCommitterFilter: true))
);

var app = builder.Build();

app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

Blazor Web App

builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents();

builder.Services.AddCrestAppsCore(crestApps => crestApps
    .AddAISuite(ai => ai.AddOpenAI()));

var app = builder.Build();

app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseAntiforgery();
app.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode();

Minimal APIs

StoreCommitterEndpointFilter is an IEndpointFilter; add it to a group whose handlers write through a staged store.

var api = app.MapGroup("/api")
    .AddEndpointFilter<StoreCommitterEndpointFilter>();

api.MapPost("/chat", () => Results.Accepted());

Do not add StoreCommitterEndpointFilter when the selected store persists each write immediately.

Endpoint and Protocol Composition

Register protocol services before mapping their endpoints. The MVC and Blazor sample hosts map SignalR hubs with MapHub, MCP with MapMcp("mcp"), A2A with MapA2AHost(), and document/chat endpoints with AddChatApiEndpoints() plus the applicable Add*Endpoint() extensions.

Use AddCrestAppsStoreCommitterFilter() for controllers. For hub writes, use the ISignalRServerBuilder overload named AddCrestAppsStoreCommitterFilter(); the AI suite exposes this through .AddSignalR(addStoreCommitterFilter: true).

Startup Composition

The sample hosts use AddSharedSampleHostDefaults() for NLog, App_Data, data-protection key persistence, and site-settings option bridges. These are sample-host helpers in CrestApps.Core.Startup.Shared, not required framework registration. Use AddSharedSiteSettings(...), AddSharedArticleServices(), and AddSharedTemplateProviders() only when adopting those sample patterns.

Use the MVC sample for full MVC, storage, MCP, A2A, document, SignalR, and search composition. Use the Blazor sample for AddRazorComponents, server interactivity, and the same CrestApps service composition. Keep credentials in CrestApps:AI:Connections and deployment selection in CrestApps:AI:Deployments.