diff --git a/pkg/systray/messages.go b/pkg/systray/messages.go
new file mode 100644
index 0000000..4fc5bfe
--- /dev/null
+++ b/pkg/systray/messages.go
@@ -0,0 +1,30 @@
+package systray
+
+// QueryConfig requests this service's config section from the display orchestrator.
+// Result: map[string]any
+type QueryConfig struct{}
+
+// --- Tasks ---
+
+// TaskSetTrayIcon sets the tray icon.
+type TaskSetTrayIcon struct{ Data []byte }
+
+// TaskSetTrayMenu sets the tray menu items.
+type TaskSetTrayMenu struct{ Items []TrayMenuItem }
+
+// TaskShowPanel shows the tray panel window.
+type TaskShowPanel struct{}
+
+// TaskHidePanel hides the tray panel window.
+type TaskHidePanel struct{}
+
+// TaskSaveConfig persists this service's config section via the display orchestrator.
+type TaskSaveConfig struct{ Value map[string]any }
+
+// --- Actions ---
+
+// ActionTrayClicked is broadcast when the tray icon is clicked.
+type ActionTrayClicked struct{}
+
+// ActionTrayMenuItemClicked is broadcast when a tray menu item is clicked.
+type ActionTrayMenuItemClicked struct{ ActionID string }
diff --git a/pkg/systray/register.go b/pkg/systray/register.go
new file mode 100644
index 0000000..b4d133b
--- /dev/null
+++ b/pkg/systray/register.go
@@ -0,0 +1,14 @@
+package systray
+
+import "forge.lthn.ai/core/go/pkg/core"
+
+// Register creates a factory closure that captures the Platform adapter.
+func Register(p Platform) func(*core.Core) (any, error) {
+	return func(c *core.Core) (any, error) {
+		return &Service{
+			ServiceRuntime: core.NewServiceRuntime[Options](c, Options{}),
+			platform:       p,
+			manager:        NewManager(p),
+		}, nil
+	}
+}
diff --git a/pkg/systray/service.go b/pkg/systray/service.go
new file mode 100644
index 0000000..6dc2ec9
--- /dev/null
+++ b/pkg/systray/service.go
@@ -0,0 +1,78 @@
+package systray
+
+import (
+	"context"
+
+	"forge.lthn.ai/core/go/pkg/core"
+)
+
+// Options holds configuration for the systray service.
+type Options struct{}
+
+// Service is a core.Service managing the system tray via IPC.
+type Service struct {
+	*core.ServiceRuntime[Options]
+	manager  *Manager
+	platform Platform
+}
+
+// OnStartup queries config and registers IPC handlers.
+func (s *Service) OnStartup(ctx context.Context) error {
+	cfg, handled, _ := s.Core().QUERY(QueryConfig{})
+	if handled {
+		if tCfg, ok := cfg.(map[string]any); ok {
+			s.applyConfig(tCfg)
+		}
+	}
+	s.Core().RegisterTask(s.handleTask)
+	return nil
+}
+
+func (s *Service) applyConfig(cfg map[string]any) {
+	// Apply config — tooltip, icon path, etc.
+	tooltip, _ := cfg["tooltip"].(string)
+	if tooltip == "" {
+		tooltip = "Core"
+	}
+	_ = s.manager.Setup(tooltip, tooltip)
+}
+
+// HandleIPCEvents is auto-discovered and registered by core.WithService.
+func (s *Service) HandleIPCEvents(c *core.Core, msg core.Message) error {
+	return nil
+}
+
+func (s *Service) handleTask(c *core.Core, t core.Task) (any, bool, error) {
+	switch t := t.(type) {
+	case TaskSetTrayIcon:
+		return nil, true, s.manager.SetIcon(t.Data)
+	case TaskSetTrayMenu:
+		return nil, true, s.taskSetTrayMenu(t)
+	case TaskShowPanel:
+		// Panel show — deferred (requires WindowHandle integration)
+		return nil, true, nil
+	case TaskHidePanel:
+		// Panel hide — deferred (requires WindowHandle integration)
+		return nil, true, nil
+	default:
+		return nil, false, nil
+	}
+}
+
+func (s *Service) taskSetTrayMenu(t TaskSetTrayMenu) error {
+	// Register IPC-emitting callbacks for each menu item
+	for _, item := range t.Items {
+		if item.ActionID != "" {
+			actionID := item.ActionID
+			s.manager.RegisterCallback(actionID, func() {
+				_ = s.Core().ACTION(ActionTrayMenuItemClicked{ActionID: actionID})
+			})
+		}
+	}
+	return s.manager.SetMenu(t.Items)
+}
+
+// Manager returns the underlying systray Manager.
+func (s *Service) Manager() *Manager {
+	return s.manager
+}
diff --git a/pkg/systray/service_test.go b/pkg/systray/service_test.go
new file mode 100644
index 0000000..4bcec30
--- /dev/null
+++ b/pkg/systray/service_test.go
@@ -0,0 +1,63 @@
+package systray
+
+import (
+	"context"
+	"testing"
+
+	"forge.lthn.ai/core/go/pkg/core"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func newTestSystrayService(t *testing.T) (*Service, *core.Core) {
+	t.Helper()
+	c, err := core.New(
+		core.WithService(Register(newMockPlatform())),
+		core.WithServiceLock(),
+	)
+	require.NoError(t, err)
+	require.NoError(t, c.ServiceStartup(context.Background(), nil))
+	svc := core.MustServiceFor[*Service](c, "systray")
+	return svc, c
+}
+
+func TestRegister_Good(t *testing.T) {
+	svc, _ := newTestSystrayService(t)
+	assert.NotNil(t, svc)
+	assert.NotNil(t, svc.manager)
+}
+
+func TestTaskSetTrayIcon_Good(t *testing.T) {
+	svc, c := newTestSystrayService(t)
+
+	// Setup tray first (normally done via config in OnStartup)
+	require.NoError(t, svc.manager.Setup("Test", "Test"))
+
+	icon := []byte{0x89, 0x50, 0x4E, 0x47} // PNG header
+	_, handled, err := c.PERFORM(TaskSetTrayIcon{Data: icon})
+	require.NoError(t, err)
+	assert.True(t, handled)
+}
+
+func TestTaskSetTrayMenu_Good(t *testing.T) {
+	svc, c := newTestSystrayService(t)
+
+	require.NoError(t, svc.manager.Setup("Test", "Test"))
+
+	items := []TrayMenuItem{
+		{Label: "Open", ActionID: "open"},
+		{Type: "separator"},
+		{Label: "Quit", ActionID: "quit"},
+	}
+	_, handled, err := c.PERFORM(TaskSetTrayMenu{Items: items})
+	require.NoError(t, err)
+	assert.True(t, handled)
+}
+
+func TestTaskSetTrayIcon_Bad(t *testing.T) {
+	// No systray service — PERFORM returns handled=false
+	c, err := core.New(core.WithServiceLock())
+	require.NoError(t, err)
+	_, handled, _ := c.PERFORM(TaskSetTrayIcon{Data: nil})
+	assert.False(t, handled)
+}