CrestApps.Core Orchestration - Prompt Templates

Configure the Default Orchestrator

You are a CrestApps.Core expert. Generate code and guidance for the default orchestration pipeline in CrestApps.Core.

Guidelines

• Use the default orchestrator when the host needs tool calling, retrieval, streaming, and response routing in one pipeline.
• Register orchestration through AddAISuite(...) or AddCoreAIOrchestration().
• Inject IOrchestratorResolver and call Resolve(name) to obtain the configured orchestrator. Resolution falls back to the configured default when the name is empty or unknown.
• Let the orchestrator handle threshold-based tool scoping instead of manually injecting very large tool sets.

Raw Registration

builder.Services
    .AddCoreAIServices()
    .AddCoreAIOrchestration()
    .AddCoreAIOpenAI();

Streaming Example

public sealed class ChatService(IOrchestrator orchestrator)
{
    public async IAsyncEnumerable<string> StreamAsync(OrchestrationContext context)
    {
        await foreach (var update in orchestrator.ExecuteStreamingAsync(context))
        {
            if (!string.IsNullOrEmpty(update.Text))
            {
                yield return update.Text;
            }
        }
    }
}

Important Services

Service	Purpose
IOrchestrator	Main agentic execution loop
IOrchestratorResolver	Resolve a named orchestrator with fallback to the configured default
IToolRegistry	Merge tools from all providers
IAIToolsService	Resolve a registered keyed AITool by name
IOrchestrationContextBuilder	Build orchestration context through handlers

Default Scoping Guidance

• At or below ScopingThreshold, all configured tools are passed through.
• Above that threshold, non-MCP catalogs at or below PlanningThreshold use relevance scoring without an LLM planning call.
• MCP tools or a count above PlanningThreshold trigger an LLM planning phase followed by relevance scoring.
• If planning fails, the orchestrator still scopes by the user message and recent conversation context.