fix(accountsvc): guard nil agent registry on startup

api/api.go

@@ -13,6 +13,7 @@ import (
 	"math/big"
 	"net/http"
 	"net/url"
+	"reflect"
 	"strings"
 	"sync"
 	"time"
@@ -220,10 +221,26 @@ func WithOAuthFrontendURL(url string) Option {
 // WithAgentRegistry configures the handler with the provided agent registry.
 func WithAgentRegistry(registry agentRegistry) Option {
 	return func(h *handler) {
+		if isNilAgentRegistry(registry) {
+			return
+		}
 		h.agentRegistry = registry
 	}
 }
 
+func isNilAgentRegistry(registry agentRegistry) bool {
+	if registry == nil {
+		return true
+	}
+	value := reflect.ValueOf(registry)
+	switch value.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Pointer, reflect.Slice:
+		return value.IsNil()
+	default:
+		return false
+	}
+}
+
 // WithGormDB configures the handler with the provided GORM database for admin settings.
 func WithGormDB(db *gorm.DB) Option {
 	return func(h *handler) {

api/api_test.go

@@ -113,6 +113,17 @@ func extractVerificationCodeFromMessage(t *testing.T, msg capturedEmail) string
 	return ""
 }
 
+func TestWithAgentRegistry_IgnoresTypedNil(t *testing.T) {
+	var registry *agentserver.Registry
+	h := &handler{}
+
+	WithAgentRegistry(registry)(h)
+
+	if h.agentRegistry != nil {
+		t.Fatalf("expected nil agent registry, got %T", h.agentRegistry)
+	}
+}
+
 func decodeResponse(t *testing.T, rr *httptest.ResponseRecorder) apiResponse {
 	t.Helper()
 	var resp apiResponse

cmd/accountsvc/main.go

@@ -841,10 +841,12 @@ func runServer(ctx context.Context, cfg *config.Config, logger *slog.Logger) err
 	options = append(options, api.WithGormDB(gormDB))
 
 	// Pre-load sandbox bindings from database into the registry
-	var sandboxBindings []model.SandboxBinding
-	if err := gormDB.Find(&sandboxBindings).Error; err == nil {
-		for _, b := range sandboxBindings {
-			agentRegistry.SetSandboxAgent(b.AgentID, true)
+	if agentRegistry != nil {
+		var sandboxBindings []model.SandboxBinding
+		if err := gormDB.Find(&sandboxBindings).Error; err == nil {
+			for _, b := range sandboxBindings {
+				agentRegistry.SetSandboxAgent(b.AgentID, true)
+			}
 		}
 	}