feat: add explicit support for Gemini agent in API and update documentation

Author: 35C4n0r

README.md

@@ -1,6 +1,6 @@
 # AgentAPI
 
-Control [Claude Code](https://github.com/anthropics/claude-code), [Goose](https://github.com/block/goose), [Aider](https://github.com/Aider-AI/aider), and [Codex](https://github.com/openai/codex) with an HTTP API.
+Control [Claude Code](https://github.com/anthropics/claude-code), [Goose](https://github.com/block/goose), [Aider](https://github.com/Aider-AI/aider), [Gemini](https://github.com/google-gemini/gemini-cli) and [Codex](https://github.com/openai/codex) with an HTTP API.
 
 ![agentapi-chat](https://github.com/user-attachments/assets/57032c9f-4146-4b66-b219-09e38ab7690d)
 

cmd/root.go

@@ -12,7 +12,7 @@ import (
 var rootCmd = &cobra.Command{
 	Use:     "agentapi",
 	Short:   "AgentAPI CLI",
-	Long:    `AgentAPI - HTTP API for Claude Code, Goose, Aider, and Codex`,
+	Long:    `AgentAPI - HTTP API for Claude Code, Goose, Aider, Gemini and Codex`,
 	Version: "0.2.3",
 }
 

cmd/server/server.go

@@ -34,6 +34,7 @@ const (
 	AgentTypeGoose  AgentType = msgfmt.AgentTypeGoose
 	AgentTypeAider  AgentType = msgfmt.AgentTypeAider
 	AgentTypeCodex  AgentType = msgfmt.AgentTypeCodex
+	AgentTypeGemini AgentType = msgfmt.AgentTypeGemini
 	AgentTypeCustom AgentType = msgfmt.AgentTypeCustom
 )
 
@@ -46,6 +47,8 @@ func parseAgentType(firstArg string, agentTypeVar string) (AgentType, error) {
 		agentType = AgentTypeGoose
 	case string(AgentTypeAider):
 		agentType = AgentTypeAider
+	case string(AgentTypeGemini):
+		agentType = AgentTypeGemini
 	case string(AgentTypeCustom):
 		agentType = AgentTypeCustom
 	case string(AgentTypeCodex):
@@ -68,6 +71,8 @@ func parseAgentType(firstArg string, agentTypeVar string) (AgentType, error) {
 		agentType = AgentTypeAider
 	case string(AgentTypeCodex):
 		agentType = AgentTypeCodex
+	case string(AgentTypeGemini):
+		agentType = AgentTypeGemini
 	default:
 		agentType = AgentTypeCustom
 	}
@@ -137,7 +142,7 @@ func runServer(ctx context.Context, logger *slog.Logger, argsToPass []string) er
 var ServerCmd = &cobra.Command{
 	Use:   "server [agent]",
 	Short: "Run the server",
-	Long:  `Run the server with the specified agent (claude, goose, aider, codex)`,
+	Long:  `Run the server with the specified agent (claude, goose, aider, gemini, codex)`,
 	Args:  cobra.MinimumNArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
 		logger := slog.New(slog.NewTextHandler(os.Stdout, nil))

lib/msgfmt/msgfmt.go

@@ -205,6 +205,7 @@ const (
 	AgentTypeGoose  AgentType = "goose"
 	AgentTypeAider  AgentType = "aider"
 	AgentTypeCodex  AgentType = "codex"
+	AgentTypeGemini AgentType = "gemini"
 	AgentTypeCustom AgentType = "custom"
 )
 
@@ -226,6 +227,8 @@ func FormatAgentMessage(agentType AgentType, message string, userInput string) s
 		return formatGenericMessage(message, userInput)
 	case AgentTypeCodex:
 		return formatGenericMessage(message, userInput)
+	case AgentTypeGemini:
+		return formatGenericMessage(message, userInput)
 	case AgentTypeCustom:
 		return formatGenericMessage(message, userInput)
 	default: