Semantic function example: fixing JSON syntax with a semantic function

[dluc]

using System;
using System.Text.Json;
using Microsoft.SemanticKernel;
using Microsoft.SemanticKernel.KernelExtensions;

// Load the kernel
IKernel kernel = new KernelBuilder().Build();

// Choose an AI model
kernel.Config.AddOpenAICompletionBackend("dv", "text-davinci-003", "...API KEY...");

// Create a semantic function
var fixit = kernel.CreateSemanticFunction(
@"I tried parsing this {{$format}} string and got an exception: {{$error}}.
Fix the {{$format}} syntax to address the error.
Value to fix: {{$input}}", 
maxTokens: 1024);

// Setup the context
var context = kernel.CreateNewContext();
context["format"] = "JSON";
context["input"] = "{ 'field': 'value";

// Show the original broken JSON
Console.WriteLine($"Original value: {context}");

try
{
    // Try to parse the JSON
    var data = JsonSerializer.Deserialize<dynamic>(context["input"]);
}
catch (Exception e)
{
    // Show the error
    Console.WriteLine($"Exception: {e.Message}");

    // Capture the error message and pass it to AI
    context["error"] = e.Message;

    // Run the semantic function, ask AI to fix the problem
    var result = await fixit.InvokeAsync(context);

    // Show the new JSON, fixed by AI
    Console.WriteLine(result.Result);
}

Output:

Original value: { 'field': 'value

Exception: ''' is an invalid start of a property name. Expected a '"'. Path: $ | LineNumber: 0 | BytePositionInLine: 2.
' }

Corrected value: { "field": "value" }