Add projects

backend/internal/constant/constant.go

@@ -0,0 +1,30 @@
+// Package constant defines provider name constants used throughout the CLI Proxy API.
+// These constants identify different AI service providers and their variants,
+// ensuring consistent naming across the application.
+package constant
+
+const (
+	// Gemini represents the Google Gemini provider identifier.
+	Gemini = "gemini"
+
+	// GeminiInteractions represents the native Google Interactions API provider identifier.
+	GeminiInteractions = "gemini-interactions"
+
+	// Codex represents the OpenAI Codex provider identifier.
+	Codex = "codex"
+
+	// Claude represents the Anthropic Claude provider identifier.
+	Claude = "claude"
+
+	// OpenAI represents the OpenAI provider identifier.
+	OpenAI = "openai"
+
+	// OpenaiResponse represents the OpenAI response format identifier.
+	OpenaiResponse = "openai-response"
+
+	// Antigravity represents the Antigravity response format identifier.
+	Antigravity = "antigravity"
+
+	// Interactions represents the Google Interactions API format identifier.
+	Interactions = "interactions"
+)