Add projects

backend/internal/interfaces/error_message.go

@@ -0,0 +1,29 @@
+// Package interfaces defines the core interfaces and shared structures for the CLI Proxy API server.
+// These interfaces provide a common contract for different components of the application,
+// such as AI service clients, API handlers, and data models.
+package interfaces
+
+import "net/http"
+
+// ErrorMessage encapsulates an error with an associated HTTP status code.
+// This structure is used to provide detailed error information including
+// both the HTTP status and the underlying error.
+type ErrorMessage struct {
+	// StatusCode is the HTTP status code returned by the API.
+	StatusCode int
+
+	// Error is the underlying error that occurred.
+	Error error
+
+	// Addon contains upstream headers that may be passed through when enabled.
+	Addon http.Header
+
+	// DirectResponse reports that Body and Headers were explicitly supplied by a trusted in-process component.
+	DirectResponse bool
+
+	// Body contains a preformatted downstream response when DirectResponse is true.
+	Body []byte
+
+	// Headers contains downstream response headers when DirectResponse is true.
+	Headers http.Header
+}