模型列表改用 desktop 身份，agent 运行仍用 cli

conversation.go

@@ -329,7 +329,7 @@ func buildRun(conv chatConversation, tools []chatTool, model modelResolution, id
 	mid := randomID()
 	user := protobuf(nil).text(1, conv.Last).text(2, mid).uint(4, 1)
 	turn := protobuf(nil).bytes(1, protobuf(nil).bytes(1, put(user)).text(10, mid))
-	state = state.bytes(8, put(turn)).uint(10, 1).text(22, "cli")
+	state = state.bytes(8, put(turn)).uint(10, 1).text(22, agentClientType)
 	rc := protobuf(nil).bytes(4, cursorEnvironment())
 	var mcp protobuf
 	for _, t := range tools {

host_http.go

@@ -208,6 +208,9 @@ func (b *hostBody) Close() error {
 	return nil
 }
 func (s *requestScope) json(ctx context.Context, method, path, token string, body any) (map[string]any, error) {
+	return s.jsonClient(ctx, method, path, token, body, agentClientType)
+}
+func (s *requestScope) jsonClient(ctx context.Context, method, path, token string, body any, clientType string) (map[string]any, error) {
 	url := path
 	if len(path) > 0 && path[0] == '/' {
 		url = cursorAPI + path
@@ -216,7 +219,7 @@ func (s *requestScope) json(ctx context.Context, method, path, token string, bod
 	if body != nil {
 		payload = encodeJSON(body)
 	}
-	h := headers(token)
+	h := headersWithType(token, clientType)
 	if strings.HasPrefix(path, "/auth/") || strings.HasPrefix(path, "/oauth/") {
 		h.Del("Connect-Protocol-Version")
 	}

identity_test.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestClientIdentitySplit(t *testing.T) {
+	if got := headers("").Get("X-Cursor-Client-Type"); got != "cli" {
+		t.Fatalf("agent header client type = %q", got)
+	}
+	if agentClientType != "cli" {
+		t.Fatalf("agent client type = %q", agentClientType)
+	}
+	if got := headersWithType("token", catalogClientType).Get("X-Cursor-Client-Type"); got != "desktop" {
+		t.Fatalf("catalog header client type = %q", got)
+	}
+	if headersWithType("token", catalogClientType).Get("Authorization") != "Bearer token" {
+		t.Fatal("catalog header dropped the bearer token")
+	}
+	run, _ := buildRun(chatConversation{Last: "ping"}, nil, modelResolution{ID: "grok"}, "conv")
+	if bytes.Contains(run, []byte("desktop")) {
+		t.Fatal("agent run payload advertises desktop")
+	}
+	if !bytes.Contains(run, []byte(agentClientType)) {
+		t.Fatal("agent run payload is missing the cli identity")
+	}
+}

models.go

@@ -277,10 +277,10 @@ func (p *pluginRuntime) catalog(s *requestScope, token string) ([]modelEntry, er
 	var usableErr error
 	ready := make(chan struct{})
 	go func() {
-		usable, usableErr = s.json(s.ctx, http.MethodPost, "/agent.v1.AgentService/GetUsableModels", token, map[string]any{})
+		usable, usableErr = s.jsonClient(s.ctx, http.MethodPost, "/agent.v1.AgentService/GetUsableModels", token, map[string]any{}, catalogClientType)
 		close(ready)
 	}()
-	picker, err := s.json(s.ctx, http.MethodPost, "/aiserver.v1.AiService/AvailableModels", token, map[string]any{"useModelParameters": true, "doNotUseMarkdown": true})
+	picker, err := s.jsonClient(s.ctx, http.MethodPost, "/aiserver.v1.AiService/AvailableModels", token, map[string]any{"useModelParameters": true, "doNotUseMarkdown": true}, catalogClientType)
 	<-ready
 	if err != nil {
 		return nil, err

runtime.go

@@ -22,6 +22,12 @@ const cursorAPI = "https://api2.cursor.sh"
 const clientVersion = "cli-2026.09.23-86fc751"
 const maxWireBytes = 64 << 20
 
+// Some Cursor team accounts only list models such as Claude Opus when the
+// catalog client type is desktop. Agent runs stay cli so Cursor keeps the
+// MCP tool protocol this plugin translates.
+const agentClientType = "cli"
+const catalogClientType = "desktop"
+
 type hostCaller func(string, []byte) ([]byte, error)
 type rpcError struct {
 	Code       string `json:"code"`
@@ -276,7 +282,10 @@ func jwtExpiry(token string) int64 {
 	return int64(num(m["exp"]) * 1000)
 }
 func headers(token string) http.Header {
-	h := http.Header{"Content-Type": {"application/json"}, "Connect-Protocol-Version": {"1"}, "X-Cursor-Client-Version": {clientVersion}, "X-Cursor-Client-Type": {"cli"}, "X-Ghost-Mode": {"true"}}
+	return headersWithType(token, agentClientType)
+}
+func headersWithType(token, clientType string) http.Header {
+	h := http.Header{"Content-Type": {"application/json"}, "Connect-Protocol-Version": {"1"}, "X-Cursor-Client-Version": {clientVersion}, "X-Cursor-Client-Type": {clientType}, "X-Ghost-Mode": {"true"}}
 	if token != "" {
 		h.Set("Authorization", "Bearer "+token)
 	}