Delegate PromptTemplateHelper

Namespace

LMKit.TextGeneration.Prompts

Assembly

LM-Kit.NET.dll

Delegate for custom template helper functions that can be invoked from within a template.

public delegate string PromptTemplateHelper(object[] arguments)

Parameters

arguments object[]

The arguments passed from the template expression.

Returns

string

The string result to insert into the rendered output.

Examples

Registering a custom date helper:

using LMKit.TextGeneration.Prompts;

var context = new PromptTemplateContext();
context.RegisterHelper("now", args =>
{
    string format = args.Length > 0 ? args[0]?.ToString() : "yyyy-MM-dd";
    return DateTime.Now.ToString(format);
});

var template = PromptTemplate.Parse("Today is {{now yyyy-MM-dd}}.");
string result = template.Render(context);
// "Today is 2026-02-18."