fix: always use system copilot cli

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

sidecar/src/Kopaya.AgentHost/Kopaya.AgentHost.csproj

@@ -8,6 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="GitHub.Copilot.SDK" Version="0.2.0" />
     <PackageReference Include="Microsoft.Agents.AI" Version="1.0.0-rc4" />
     <PackageReference Include="Microsoft.Agents.AI.GitHub.Copilot" Version="1.0.0-preview.260311.1" />
     <PackageReference Include="Microsoft.Agents.AI.Workflows" Version="1.0.0-rc4" />

sidecar/src/Kopaya.AgentHost/Services/CopilotCliPathResolver.cs

@@ -1,4 +1,3 @@
-using System.Runtime.InteropServices;
 using GitHub.Copilot.SDK;
 
 namespace Kopaya.AgentHost.Services;
@@ -8,62 +7,34 @@ internal static class CopilotCliPathResolver
     private const string CopilotCommandName = "copilot";
     private const string DefaultWindowsPathExtensions = ".COM;.EXE;.BAT;.CMD";
 
-    public static CopilotClientOptions? CreateClientOptions()
+    public static CopilotClientOptions CreateClientOptions()
     {
-        CopilotCliResolution resolution = Resolve(
-            Environment.ProcessPath,
+        string? cliPath = Resolve(
             Environment.GetEnvironmentVariable("PATH"),
             Environment.GetEnvironmentVariable("PATHEXT"),
-            RuntimeInformation.IsOSPlatform(OSPlatform.Windows),
+            OperatingSystem.IsWindows(),
             File.Exists);
 
-        if (!resolution.ShouldOverrideCliPath)
-        {
-            return null;
-        }
-
-        if (string.IsNullOrWhiteSpace(resolution.CliPath))
+        if (string.IsNullOrWhiteSpace(cliPath))
         {
             throw new InvalidOperationException(
-                "Development sidecar could not find the system-installed 'copilot' command on PATH. Install the GitHub Copilot CLI or provide an explicit CliPath.");
+                "Kopaya requires the system-installed 'copilot' command on PATH. Install the GitHub Copilot CLI and ensure it is available in the current environment.");
         }
 
         return new CopilotClientOptions
         {
-            CliPath = resolution.CliPath,
+            CliPath = cliPath,
         };
     }
 
-    internal static CopilotCliResolution Resolve(
-        string? processPath,
+    internal static string? Resolve(
         string? pathValue,
         string? pathExtValue,
         bool isWindows,
         Func<string, bool> fileExists)
     {
         ArgumentNullException.ThrowIfNull(fileExists);
-
-        if (!IsDevelopmentHost(processPath))
-        {
-            return default;
-        }
-
-        return new CopilotCliResolution(
-            ShouldOverrideCliPath: true,
-            CliPath: ResolveCliPath(pathValue, pathExtValue, isWindows, fileExists));
-    }
-
-    private static bool IsDevelopmentHost(string? processPath)
-    {
-        if (string.IsNullOrWhiteSpace(processPath))
-        {
-            return false;
-        }
-
-        return string.Equals(
-            Path.GetFileNameWithoutExtension(processPath),
-            "dotnet",
-            StringComparison.OrdinalIgnoreCase);
+        return ResolveCliPath(pathValue, pathExtValue, isWindows, fileExists);
     }
 
     private static string? ResolveCliPath(
@@ -128,5 +99,3 @@ internal static class CopilotCliPathResolver
         }
     }
 }
-
-internal readonly record struct CopilotCliResolution(bool ShouldOverrideCliPath, string? CliPath);

sidecar/src/Kopaya.AgentHost/Services/CopilotWorkflowRunner.cs

@@ -170,11 +170,11 @@ public sealed class CopilotWorkflowRunner
         {
             List<IAsyncDisposable> disposables = [];
             List<AIAgent> agents = [];
-            CopilotClientOptions? clientOptions = CopilotCliPathResolver.CreateClientOptions();
+            CopilotClientOptions clientOptions = CopilotCliPathResolver.CreateClientOptions();
 
             foreach (PatternAgentDefinitionDto definition in pattern.Agents)
             {
-                CopilotClient client = clientOptions is null ? new() : new(clientOptions);
+                CopilotClient client = new(clientOptions);
                 await client.StartAsync(cancellationToken).ConfigureAwait(false);
 
                 SessionConfig sessionConfig = new()
@@ -263,7 +263,7 @@ public sealed class CopilotWorkflowRunner
         {
             return Task.FromResult(new PermissionRequestResult
             {
-                Kind = "approved",
+                Kind = PermissionRequestResultKind.Approved,
             });
         }
     }

sidecar/tests/Kopaya.AgentHost.Tests/CopilotCliPathResolverTests.cs

@@ -5,7 +5,7 @@ namespace Kopaya.AgentHost.Tests;
 public sealed class CopilotCliPathResolverTests
 {
     [Fact]
-    public void Resolve_UsesCopilotFromPathDuringDevelopment()
+    public void Resolve_UsesCopilotFromPath()
     {
         string copilotDirectory = @"C:\tools\copilot";
         HashSet<string> existingFiles = new(StringComparer.OrdinalIgnoreCase)
@@ -13,42 +13,42 @@ public sealed class CopilotCliPathResolverTests
             Path.Combine(copilotDirectory, "copilot.exe"),
         };
 
-        CopilotCliResolution resolution = CopilotCliPathResolver.Resolve(
-            processPath: @"C:\Program Files\dotnet\dotnet.exe",
+        string? cliPath = CopilotCliPathResolver.Resolve(
             pathValue: $"C:\\other;\"{copilotDirectory}\"",
             pathExtValue: ".COM;.EXE;.BAT;.CMD",
             isWindows: true,
             fileExists: existingFiles.Contains);
 
-        Assert.True(resolution.ShouldOverrideCliPath);
-        Assert.Equal(Path.Combine(copilotDirectory, "copilot.exe"), resolution.CliPath, ignoreCase: true);
+        Assert.Equal(Path.Combine(copilotDirectory, "copilot.exe"), cliPath, ignoreCase: true);
     }
 
     [Fact]
-    public void Resolve_LeavesPackagedRuntimeOnBundledCli()
+    public void Resolve_UsesDefaultWindowsExtensionsWhenPathExtMissing()
     {
-        CopilotCliResolution resolution = CopilotCliPathResolver.Resolve(
-            processPath: @"C:\Program Files\Kopaya\Kopaya.AgentHost.exe",
-            pathValue: @"C:\tools",
-            pathExtValue: ".COM;.EXE;.BAT;.CMD",
+        string copilotDirectory = @"C:\tools\copilot";
+        HashSet<string> existingFiles = new(StringComparer.OrdinalIgnoreCase)
+        {
+            Path.Combine(copilotDirectory, "copilot.cmd"),
+        };
+
+        string? cliPath = CopilotCliPathResolver.Resolve(
+            pathValue: $"C:\\other;\"{copilotDirectory}\"",
+            pathExtValue: null,
             isWindows: true,
-            fileExists: _ => true);
+            fileExists: existingFiles.Contains);
 
-        Assert.False(resolution.ShouldOverrideCliPath);
-        Assert.Null(resolution.CliPath);
+        Assert.Equal(Path.Combine(copilotDirectory, "copilot.cmd"), cliPath, ignoreCase: true);
     }
 
     [Fact]
-    public void Resolve_ReportsMissingCopilotWhenDevelopmentPathDoesNotContainIt()
+    public void Resolve_ReturnsNullWhenPathDoesNotContainCopilot()
     {
-        CopilotCliResolution resolution = CopilotCliPathResolver.Resolve(
-            processPath: @"C:\Program Files\dotnet\dotnet.exe",
+        string? cliPath = CopilotCliPathResolver.Resolve(
             pathValue: @"C:\tools;C:\other",
             pathExtValue: ".COM;.EXE;.BAT;.CMD",
             isWindows: true,
             fileExists: _ => false);
 
-        Assert.True(resolution.ShouldOverrideCliPath);
-        Assert.Null(resolution.CliPath);
+        Assert.Null(cliPath);
     }
 }