feat: agent visual indicator

chat/src/app/header.tsx

@@ -1,10 +1,10 @@
 "use client";
 
-import { useChat } from "@/components/chat-provider";
-import { ModeToggle } from "../components/mode-toggle";
+import {AgentType, useChat} from "@/components/chat-provider";
+import {ModeToggle} from "@/components/mode-toggle";
 
 export function Header() {
-  const { serverStatus } = useChat();
+  const {serverStatus, agentType} = useChat();
 
   return (
     <header className="p-4 flex items-center justify-between border-b">
@@ -24,7 +24,13 @@ export function Header() {
             <span className="first-letter:uppercase">{serverStatus}</span>
           </div>
         )}
-        <ModeToggle />
+
+        {agentType !== "unknown" && (
+          <div className="flex items-center gap-2 text-sm font-medium">
+            <span>{AgentType[agentType].displayName}</span>
+          </div>
+        )}
+        <ModeToggle/>
       </div>
     </header>
   );

chat/src/components/chat-provider.tsx

@@ -9,7 +9,7 @@ import {
   PropsWithChildren,
   useContext,
 } from "react";
-import { toast } from "sonner";
+import {toast} from "sonner";
 import {getErrorMessage} from "@/lib/error-utils";
 
 interface Message {
@@ -33,6 +33,7 @@ interface MessageUpdateEvent {
 
 interface StatusChangeEvent {
   status: string;
+  agent_type: string;
 }
 
 interface APIErrorDetail {
@@ -64,12 +65,35 @@ export interface FileUploadResponse {
   filePath?: string;
 }
 
+export type AgentType = "claude" | "goose" | "aider" | "gemini" | "amp" | "codex" | "cursor" | "cursor-agent" | "copilot" | "auggie" | "amazonq" | "opencode" | "custom" | "unknown";
+
+export type AgentColorDisplayNamePair = {
+  displayName: string;
+}
+
+export const AgentType: Record<Exclude<AgentType, "unknown">, AgentColorDisplayNamePair> = {
+  claude: {displayName: "Claude Code"},
+  goose: {displayName: "Goose"},
+  aider: {displayName: "Aider"},
+  gemini: { displayName: "Gemini"},
+  amp: {displayName: "Amp"},
+  codex: {displayName: "Codex"},
+  cursor: { displayName: "Cursor Agent"},
+  "cursor-agent": { displayName: "Cursor Agent"},
+  copilot: {displayName: "Copilot"},
+  auggie: {displayName: "Auggie"},
+  amazonq: {displayName: "Amazon Q"},
+  opencode: {displayName: "Opencode"},
+  custom: { displayName: "Custom"}
+}
+
 interface ChatContextValue {
   messages: (Message | DraftMessage)[];
   loading: boolean;
   serverStatus: ServerStatus;
   sendMessage: (message: string, type?: MessageType) => void;
   uploadFiles: (formData: FormData) => Promise<FileUploadResponse>;
+  agentType: AgentType;
 }
 
 const ChatContext = createContext<ChatContextValue | undefined>(undefined);
@@ -113,6 +137,7 @@ export function ChatProvider({ children }: PropsWithChildren) {
   const [messages, setMessages] = useState<(Message | DraftMessage)[]>([]);
   const [loading, setLoading] = useState<boolean>(false);
   const [serverStatus, setServerStatus] = useState<ServerStatus>("unknown");
+  const [agentType, setAgentType] = useState<AgentType>("custom");
   const eventSourceRef = useRef<EventSource | null>(null);
   const agentAPIUrl = useAgentAPIUrl();
 
@@ -185,6 +210,9 @@ export function ChatProvider({ children }: PropsWithChildren) {
         } else {
           setServerStatus("unknown");
         }
+
+        // Set agent type
+        setAgentType(data.agent_type === "" ? "unknown" : data.agent_type as AgentType);
       });
 
       // Handle connection open (server is online)
@@ -311,7 +339,7 @@ export function ChatProvider({ children }: PropsWithChildren) {
       } else {
         result = (await response.json()) as FileUploadResponse;
       }
-       
+
     } catch (error) {
       result.ok = false;
       console.error("Error uploading files:", error);
@@ -332,6 +360,7 @@ export function ChatProvider({ children }: PropsWithChildren) {
         sendMessage,
         serverStatus,
         uploadFiles,
+        agentType,
       }}
     >
       {children}

lib/httpapi/events.go

@@ -44,7 +44,8 @@ type MessageUpdateBody struct {
 }
 
 type StatusChangeBody struct {
-	Status AgentStatus `json:"status" doc:"Agent status"`
+	Status    AgentStatus  `json:"status" doc:"Agent status"`
+	AgentType mf.AgentType `json:"agent_type" doc:"Type of the agent being used by the server."`
 }
 
 type ScreenUpdateBody struct {
@@ -60,6 +61,7 @@ type EventEmitter struct {
 	mu                  sync.Mutex
 	messages            []st.ConversationMessage
 	status              AgentStatus
+	agentType           mf.AgentType
 	chans               map[int]chan Event
 	chanIdx             int
 	subscriptionBufSize int
@@ -147,7 +149,7 @@ func (e *EventEmitter) UpdateMessagesAndEmitChanges(newMessages []st.Conversatio
 	e.messages = newMessages
 }
 
-func (e *EventEmitter) UpdateStatusAndEmitChanges(newStatus st.ConversationStatus) {
+func (e *EventEmitter) UpdateStatusAndEmitChanges(newStatus st.ConversationStatus, agentType mf.AgentType) {
 	e.mu.Lock()
 	defer e.mu.Unlock()
 
@@ -156,8 +158,9 @@ func (e *EventEmitter) UpdateStatusAndEmitChanges(newStatus st.ConversationStatu
 		return
 	}
 
-	e.notifyChannels(EventTypeStatusChange, StatusChangeBody{Status: newAgentStatus})
+	e.notifyChannels(EventTypeStatusChange, StatusChangeBody{Status: newAgentStatus, AgentType: agentType})
 	e.status = newAgentStatus
+	e.agentType = agentType
 }
 
 func (e *EventEmitter) UpdateScreenAndEmitChanges(newScreen string) {
@@ -183,7 +186,7 @@ func (e *EventEmitter) currentStateAsEvents() []Event {
 	}
 	events = append(events, Event{
 		Type:    EventTypeStatusChange,
-		Payload: StatusChangeBody{Status: e.status},
+		Payload: StatusChangeBody{Status: e.status, AgentType: e.agentType},
 	})
 	events = append(events, Event{
 		Type:    EventTypeScreenUpdate,

lib/httpapi/events_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 	"time"
 
+	mf "github.com/coder/agentapi/lib/msgfmt"
 	st "github.com/coder/agentapi/lib/screentracker"
 	"github.com/stretchr/testify/assert"
 )
@@ -51,11 +52,11 @@ func TestEventEmitter(t *testing.T) {
 			Payload: MessageUpdateBody{Id: 2, Message: "What's up?", Role: st.ConversationRoleAgent, Time: now},
 		}, newEvent)
 
-		emitter.UpdateStatusAndEmitChanges(st.ConversationStatusStable)
+		emitter.UpdateStatusAndEmitChanges(st.ConversationStatusStable, mf.AgentTypeAider)
 		newEvent = <-ch
 		assert.Equal(t, Event{
 			Type:    EventTypeStatusChange,
-			Payload: StatusChangeBody{Status: AgentStatusStable},
+			Payload: StatusChangeBody{Status: AgentStatusStable, AgentType: mf.AgentTypeAider},
 		}, newEvent)
 	})
 

lib/httpapi/models.go

@@ -3,6 +3,7 @@ package httpapi
 import (
 	"time"
 
+	mf "github.com/coder/agentapi/lib/msgfmt"
 	st "github.com/coder/agentapi/lib/screentracker"
 	"github.com/coder/agentapi/lib/util"
 	"github.com/danielgtaylor/huma/v2"
@@ -35,7 +36,8 @@ type Message struct {
 // StatusResponse represents the server status
 type StatusResponse struct {
 	Body struct {
-		Status AgentStatus `json:"status" doc:"Current agent status. 'running' means that the agent is processing a message, 'stable' means that the agent is idle and waiting for input."`
+		Status    AgentStatus  `json:"status" doc:"Current agent status. 'running' means that the agent is processing a message, 'stable' means that the agent is idle and waiting for input."`
+		AgentType mf.AgentType `json:"agent_type" doc:"Type of the agent being used by the server."`
 	}
 }
 

lib/httpapi/server.go

@@ -334,7 +334,7 @@ func (s *Server) StartSnapshotLoop(ctx context.Context) {
 					s.logger.Info("Initial prompt sent successfully")
 				}
 			}
-			s.emitter.UpdateStatusAndEmitChanges(currentStatus)
+			s.emitter.UpdateStatusAndEmitChanges(currentStatus, s.agentType)
 			s.emitter.UpdateMessagesAndEmitChanges(s.conversation.Messages())
 			s.emitter.UpdateScreenAndEmitChanges(s.conversation.Screen())
 			time.Sleep(snapshotInterval)
@@ -404,6 +404,7 @@ func (s *Server) getStatus(ctx context.Context, input *struct{}) (*StatusRespons
 
 	resp := &StatusResponse{}
 	resp.Body.Status = agentStatus
+	resp.Body.AgentType = s.agentType
 
 	return resp, nil
 }

lib/msgfmt/msgfmt.go

@@ -231,6 +231,7 @@ func trimEmptyLines(message string) string {
 
 type AgentType string
 
+// Remember to add the display name to the agentapi/chat/src/components/chat-provider.tsx
 const (
 	AgentTypeClaude   AgentType = "claude"
 	AgentTypeGoose    AgentType = "goose"

openapi.json

@@ -270,12 +270,17 @@
       "StatusChangeBody": {
         "additionalProperties": false,
         "properties": {
+          "agent_type": {
+            "description": "Type of the agent being used by the server.",
+            "type": "string"
+          },
           "status": {
             "$ref": "#/components/schemas/AgentStatus",
             "description": "Agent status"
           }
         },
         "required": [
+          "agent_type",
           "status"
         ],
         "type": "object"
@@ -292,12 +297,17 @@
             "readOnly": true,
             "type": "string"
           },
+          "agent_type": {
+            "description": "Type of the agent being used by the server.",
+            "type": "string"
+          },
           "status": {
             "$ref": "#/components/schemas/AgentStatus",
             "description": "Current agent status. 'running' means that the agent is processing a message, 'stable' means that the agent is idle and waiting for input."
           }
         },
         "required": [
+          "agent_type",
           "status"
         ],
         "type": "object"