refactor: rename Kopaya to Eryx

Rename the product, runtime surfaces, sidecar projects, docs, tests, and packaging outputs from Kopaya to Eryx across the repository.

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

sidecar/src/Eryx.AgentHost/AssemblyInfo.cs

@@ -0,0 +1,3 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("Eryx.AgentHost.Tests")]

sidecar/src/Eryx.AgentHost/Contracts/ProtocolModels.cs

@@ -1,6 +1,6 @@
 using System.Text.Json.Serialization;
 
-namespace Kopaya.AgentHost.Contracts;
+namespace Eryx.AgentHost.Contracts;
 
 public sealed class PatternAgentDefinitionDto
 {

sidecar/src/Eryx.AgentHost/Program.cs

@@ -1,8 +1,8 @@
-using Kopaya.AgentHost.Services;
+using Eryx.AgentHost.Services;
 
 if (!args.Contains("--stdio", StringComparer.Ordinal))
 {
-    Console.Error.WriteLine("Kopaya.AgentHost expects the --stdio flag.");
+    Console.Error.WriteLine("Eryx.AgentHost expects the --stdio flag.");
     return;
 }
 

sidecar/src/Eryx.AgentHost/Services/AgentIdentityResolver.cs

@@ -1,7 +1,7 @@
 using System.Text;
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 internal readonly record struct AgentIdentity(string AgentId, string AgentName);
 

sidecar/src/Eryx.AgentHost/Services/AgentInstructionComposer.cs

@@ -1,6 +1,6 @@
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 internal static class AgentInstructionComposer
 {

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

@@ -1,7 +1,7 @@
 using System.Collections;
 using GitHub.Copilot.SDK;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 internal static class CopilotCliPathResolver
 {
@@ -25,7 +25,7 @@ internal static class CopilotCliPathResolver
         if (string.IsNullOrWhiteSpace(cliPath))
         {
             throw new InvalidOperationException(
-                "Kopaya requires the system-installed 'copilot' command on PATH. Install the GitHub Copilot CLI and ensure it is available in the current environment.");
+                "Eryx requires the system-installed 'copilot' command on PATH. Install the GitHub Copilot CLI and ensure it is available in the current environment.");
         }
 
         CopilotCliLaunch launch = ResolveCliLaunch(

sidecar/src/Eryx.AgentHost/Services/CopilotConnectionMetadataResolver.cs

@@ -2,9 +2,9 @@ using System.Diagnostics;
 using System.Text;
 using System.Text.RegularExpressions;
 using GitHub.Copilot.SDK;
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 internal static partial class CopilotConnectionMetadataResolver
 {
@@ -156,7 +156,7 @@ internal static partial class CopilotConnectionMetadataResolver
         }
         catch (Exception exception)
         {
-            Console.Error.WriteLine($"[kopaya sidecar] Failed to inspect Copilot auth status: {exception.Message}");
+            Console.Error.WriteLine($"[eryx sidecar] Failed to inspect Copilot auth status: {exception.Message}");
             return null;
         }
     }

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

@@ -1,13 +1,13 @@
 using System.Text;
 using GitHub.Copilot.SDK;
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 using Microsoft.Agents.AI;
 using Microsoft.Agents.AI.GitHub.Copilot;
 using Microsoft.Agents.AI.Workflows;
 using Microsoft.Agents.AI.Workflows.Specialized;
 using Microsoft.Extensions.AI;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 public sealed class CopilotWorkflowRunner : ITurnWorkflowRunner
 {

sidecar/src/Eryx.AgentHost/Services/HandoffWorkflowGuidance.cs

@@ -1,6 +1,6 @@
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 internal static class HandoffWorkflowGuidance
 {

sidecar/src/Eryx.AgentHost/Services/ITurnWorkflowRunner.cs

@@ -1,6 +1,6 @@
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 public interface ITurnWorkflowRunner
 {

sidecar/src/Eryx.AgentHost/Services/PatternValidator.cs

@@ -1,6 +1,6 @@
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 public sealed class PatternValidator
 {

sidecar/src/Eryx.AgentHost/Services/SidecarProtocolHost.cs

@@ -2,9 +2,9 @@ using System.Collections.Concurrent;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using GitHub.Copilot.SDK;
-using Kopaya.AgentHost.Contracts;
+using Eryx.AgentHost.Contracts;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 public sealed class SidecarProtocolHost
 {
@@ -189,7 +189,7 @@ public sealed class SidecarProtocolHost
         catch (Exception exception)
         {
             connection = CreateMissingCliDiagnostics(exception);
-            Console.Error.WriteLine($"[kopaya sidecar] {connection.Summary} {exception.Message}");
+            Console.Error.WriteLine($"[eryx sidecar] {connection.Summary} {exception.Message}");
 
             return new SidecarCapabilitiesDto
             {
@@ -224,7 +224,7 @@ public sealed class SidecarProtocolHost
         {
             cliVersion = await cliVersionTask.ConfigureAwait(false);
             connection = CreateFailureConnectionDiagnostics(cliContext.CliPath, exception, cliVersion, account);
-            Console.Error.WriteLine($"[kopaya sidecar] Failed to list available Copilot models: {exception.Message}");
+            Console.Error.WriteLine($"[eryx sidecar] Failed to list available Copilot models: {exception.Message}");
         }
 
         return new SidecarCapabilitiesDto
@@ -323,8 +323,8 @@ public sealed class SidecarProtocolHost
     {
         string status = ClassifyConnectionStatus(exception);
         string summary = status == "copilot-auth-required"
-            ? "GitHub Copilot requires authentication before Kopaya can load models."
-            : "GitHub Copilot was found, but Kopaya could not load its model list.";
+            ? "GitHub Copilot requires authentication before Eryx can load models."
+            : "GitHub Copilot was found, but Eryx could not load its model list.";
 
         return new SidecarConnectionDiagnosticsDto
         {

sidecar/src/Eryx.AgentHost/Services/StreamingTextMerger.cs

@@ -1,6 +1,6 @@
 using System.Text.RegularExpressions;
 
-namespace Kopaya.AgentHost.Services;
+namespace Eryx.AgentHost.Services;
 
 internal static partial class StreamingTextMerger
 {

sidecar/src/Kopaya.AgentHost/AssemblyInfo.cs

@@ -1,3 +0,0 @@
-using System.Runtime.CompilerServices;
-
-[assembly: InternalsVisibleTo("Kopaya.AgentHost.Tests")]