feat: Add GitHub label retrieval functionality in DoCommandHandler

Author: HavenDV

src/Cli/src/Commands/DoCommandHandler.cs

@@ -12,6 +12,7 @@
 using ModelContextProtocol.Client;
 using ModelContextProtocol.Protocol.Transport;
 using ModelContextProtocol.Protocol.Types;
+using Octokit;
 using Tool = LangChain.Cli.Models.Tool;
 
 namespace LangChain.Cli.Commands;
@@ -188,6 +189,12 @@ .. tools.Contains(Tool.Filesystem)
                             name: "FindFilePathsByContent",
                             description: "Finds file paths by content.") }
                         : [],
+                    .. tools.Contains(Tool.GitHub)
+                        ? new [] { AIFunctionFactory.Create(
+                            GetAvailableLabels,
+                            name: "GetAvailableLabelsForRepository",
+                            description: "Retrieves all available labels for a GitHub repository.") }
+                        : [],
                 ],
                 ResponseFormat = format switch
                 {
@@ -271,6 +278,17 @@ static async Task<IList<string>> FindFilePathsByContent(
 
             return paths;
         }
+        
+        [Description("Retrieves all available labels for a GitHub repository.")]
+        static async Task<IReadOnlyList<Label>> GetAvailableLabels(
+            [Description("The owner of the repository")] string owner,
+            [Description("The name of the repository")] string name)
+        {
+            var github = new GitHubClient(new ProductHeaderValue("LangChain DO MCP extension"));
+            var labels = await github.Issue.Labels.GetAllForRepository(owner, name).ConfigureAwait(false);
+            
+            return labels;
+        }
     }
 
     public static ChatResponseFormatJson ChatResponseFormatForType<T>(

src/Cli/src/LangChain.Cli.csproj

@@ -23,6 +23,7 @@
         <PackageReference Include="Microsoft.Extensions.Logging.Console"/>
         <PackageReference Include="Microsoft.Extensions.Logging.Debug"/>
         <PackageReference Include="ModelContextProtocol"/>
+        <PackageReference Include="Octokit" />
         <PackageReference Include="OpenAI"/>
         <PackageReference Include="System.CommandLine"/>
         <PackageReference Include="System.Text.Json"/>

src/Directory.Packages.props

@@ -41,6 +41,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageVersion Include="ModelContextProtocol" Version="0.1.0-preview.4" />
     <PackageVersion Include="Moq" Version="4.20.72" />
+    <PackageVersion Include="Octokit" Version="14.0.0" />
     <PackageVersion Include="OpenAI" Version="2.2.0-beta.4" />
     <PackageVersion Include="Testcontainers" Version="4.4.0" />
     <PackageVersion Include="tryAGI.OpenAI" Version="4.2.0" />