feat: add Github Copilot provider

pkg/providers/github_copilot_provider.go

@@ -0,0 +1,85 @@
+package providers
+
+import (
+	"context"
+	"fmt"
+
+    json "encoding/json"
+	copilot "github.com/github/copilot-sdk/go"
+)
+
+type GitHubCopilotProvider struct {
+	uri         string
+	connectMode string // `stdio` or `grpc``
+	
+	session     *copilot.Session
+}
+
+func NewGitHubCopilotProvider(uri string, connectMode string, model string) *GitHubCopilotProvider {
+
+	var session *copilot.Session
+
+	switch connectMode {
+
+	case "stdio":
+
+	case "grpc":
+		client := copilot.NewClient(&copilot.ClientOptions{
+			CLIUrl: uri,
+		})
+		if err := client.Start(context.Background()); err != nil {
+			fmt.Errorf("Can't connect to Github Copilot, https://github.com/github/copilot-sdk/blob/main/docs/getting-started.md#connecting-to-an-external-cli-server for details")
+		}
+		defer client.Stop()
+		session, _ = client.CreateSession(context.Background(), &copilot.SessionConfig{
+			Model: model,
+            Hooks: &copilot.SessionHooks{
+
+            },
+		})
+	}
+
+	return &GitHubCopilotProvider{
+		uri:         uri,
+		connectMode: connectMode,
+		
+		session:     session,
+	}
+}
+
+// Chat sends a chat request to GitHub Copilot
+func (p *GitHubCopilotProvider) Chat(ctx context.Context, messages []Message, tools []ToolDefinition, model string, options map[string]interface{}) (*LLMResponse, error) {
+    type tempMessage struct {
+        Role       string `json:"role"`
+        Content    string `json:"content"`
+    }
+    out := make([]tempMessage, 0, len(messages))
+
+    for _, msg := range messages {
+        out = append(out, tempMessage{
+            Role:       msg.Role,
+            Content:    msg.Content,
+        })
+    }
+
+    fullcontent,_ := json.Marshal(out)
+    
+
+
+
+    content,_ := p.session.Send(ctx,copilot.MessageOptions{
+        Prompt: string(fullcontent),
+    })
+    
+    return &LLMResponse{
+        FinishReason : "stop",
+        Content:  content,
+    }, nil
+    
+}
+
+
+func (p *GitHubCopilotProvider) GetDefaultModel() string {
+
+    return "gpt-4.1"
+}