diff --git a/pkg/systray/menu.go b/pkg/systray/menu.go
index 085678a..32ee360 100644
--- a/pkg/systray/menu.go
+++ b/pkg/systray/menu.go
@@ -4,6 +4,7 @@ package systray
 import "forge.lthn.ai/core/go/pkg/core"
 
 // SetMenu sets a dynamic menu on the tray from TrayMenuItem descriptors.
+// Use: _ = m.SetMenu([]TrayMenuItem{{Label: "Quit", ActionID: "quit"}})
 func (m *Manager) SetMenu(items []TrayMenuItem) error {
 	if m.tray == nil {
 		return core.E("systray.SetMenu", "tray not initialised", nil)
@@ -54,6 +55,7 @@ func (m *Manager) buildMenuInto(menu PlatformMenu, items []TrayMenuItem) {
 }
 
 // RegisterCallback registers a callback for a menu action ID.
+// Use: m.RegisterCallback("quit", func() { _ = app.Quit() })
 func (m *Manager) RegisterCallback(actionID string, callback func()) {
 	m.mu.Lock()
 	m.callbacks[actionID] = callback
@@ -61,6 +63,7 @@ func (m *Manager) RegisterCallback(actionID string, callback func()) {
 }
 
 // UnregisterCallback removes a callback.
+// Use: m.UnregisterCallback("quit")
 func (m *Manager) UnregisterCallback(actionID string) {
 	m.mu.Lock()
 	delete(m.callbacks, actionID)
@@ -68,6 +71,7 @@ func (m *Manager) UnregisterCallback(actionID string) {
 }
 
 // GetCallback returns the callback for an action ID.
+// Use: callback, ok := m.GetCallback("quit")
 func (m *Manager) GetCallback(actionID string) (func(), bool) {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
@@ -76,6 +80,7 @@ func (m *Manager) GetCallback(actionID string) (func(), bool) {
 }
 
 // GetInfo returns tray status information.
+// Use: info := m.GetInfo()
 func (m *Manager) GetInfo() map[string]any {
 	return map[string]any{
 		"active":          m.IsActive(),
diff --git a/pkg/systray/messages.go b/pkg/systray/messages.go
index cb51648..46da75d 100644
--- a/pkg/systray/messages.go
+++ b/pkg/systray/messages.go
@@ -2,41 +2,52 @@ package systray
 
 // QueryConfig requests this service's config section from the display orchestrator.
 // Result: map[string]any
+// Use: result, _, err := c.QUERY(systray.QueryConfig{})
 type QueryConfig struct{}
 
 // --- Tasks ---
 
 // TaskSetTrayIcon sets the tray icon.
+// Use: _, _, err := c.PERFORM(systray.TaskSetTrayIcon{Data: iconBytes})
 type TaskSetTrayIcon struct{ Data []byte }
 
 // TaskSetTooltip updates the tray tooltip text.
+// Use: _, _, err := c.PERFORM(systray.TaskSetTooltip{Tooltip: "Core is ready"})
 type TaskSetTooltip struct{ Tooltip string }
 
 // TaskSetLabel updates the tray label text.
+// Use: _, _, err := c.PERFORM(systray.TaskSetLabel{Label: "Core"})
 type TaskSetLabel struct{ Label string }
 
 // TaskSetTrayMenu sets the tray menu items.
+// Use: _, _, err := c.PERFORM(systray.TaskSetTrayMenu{Items: items})
 type TaskSetTrayMenu struct{ Items []TrayMenuItem }
 
 // TaskShowPanel shows the tray panel window.
+// Use: _, _, err := c.PERFORM(systray.TaskShowPanel{})
 type TaskShowPanel struct{}
 
 // TaskHidePanel hides the tray panel window.
+// Use: _, _, err := c.PERFORM(systray.TaskHidePanel{})
 type TaskHidePanel struct{}
 
 // TaskShowMessage shows a tray message or notification.
+// Use: _, _, err := c.PERFORM(systray.TaskShowMessage{Title: "Core", Message: "Sync complete"})
 type TaskShowMessage struct {
 	Title   string `json:"title"`
 	Message string `json:"message"`
 }
 
 // TaskSaveConfig persists this service's config section via the display orchestrator.
+// Use: _, _, err := c.PERFORM(systray.TaskSaveConfig{Value: map[string]any{"tooltip": "Core"}})
 type TaskSaveConfig struct{ Value map[string]any }
 
 // --- Actions ---
 
 // ActionTrayClicked is broadcast when the tray icon is clicked.
+// Use: _ = c.ACTION(systray.ActionTrayClicked{})
 type ActionTrayClicked struct{}
 
 // ActionTrayMenuItemClicked is broadcast when a tray menu item is clicked.
+// Use: _ = c.ACTION(systray.ActionTrayMenuItemClicked{ActionID: "quit"})
 type ActionTrayMenuItemClicked struct{ ActionID string }
diff --git a/pkg/systray/mock_platform.go b/pkg/systray/mock_platform.go
index 7d9b21b..7c126e0 100644
--- a/pkg/systray/mock_platform.go
+++ b/pkg/systray/mock_platform.go
@@ -1,11 +1,19 @@
 package systray
 
 // MockPlatform is an exported mock for cross-package integration tests.
+// Use: platform := systray.NewMockPlatform()
 type MockPlatform struct{}
 
+// NewMockPlatform creates a tray platform mock.
+// Use: platform := systray.NewMockPlatform()
 func NewMockPlatform() *MockPlatform { return &MockPlatform{} }
 
+// NewTray creates a mock tray handle for tests.
+// Use: tray := platform.NewTray()
 func (m *MockPlatform) NewTray() PlatformTray { return &exportedMockTray{} }
+
+// NewMenu creates a mock tray menu for tests.
+// Use: menu := platform.NewMenu()
 func (m *MockPlatform) NewMenu() PlatformMenu { return &exportedMockMenu{} }
 
 type exportedMockTray struct {
diff --git a/pkg/systray/platform.go b/pkg/systray/platform.go
index 283f638..7c23929 100644
--- a/pkg/systray/platform.go
+++ b/pkg/systray/platform.go
@@ -2,12 +2,14 @@
 package systray
 
 // Platform abstracts the system tray backend.
+// Use: var p systray.Platform
 type Platform interface {
 	NewTray() PlatformTray
 	NewMenu() PlatformMenu // Menu factory for building tray menus
 }
 
 // PlatformTray is a live tray handle from the backend.
+// Use: var tray systray.PlatformTray
 type PlatformTray interface {
 	SetIcon(data []byte)
 	SetTemplateIcon(data []byte)
@@ -18,6 +20,7 @@ type PlatformTray interface {
 }
 
 // PlatformMenu is a tray menu built by the backend.
+// Use: var menu systray.PlatformMenu
 type PlatformMenu interface {
 	Add(label string) PlatformMenuItem
 	AddSeparator()
@@ -25,6 +28,7 @@ type PlatformMenu interface {
 }
 
 // PlatformMenuItem is a single item in a tray menu.
+// Use: var item systray.PlatformMenuItem
 type PlatformMenuItem interface {
 	SetTooltip(text string)
 	SetChecked(checked bool)
@@ -36,6 +40,7 @@ type PlatformMenuItem interface {
 // WindowHandle is a cross-package interface for window operations.
 // Defined locally to avoid circular imports (display imports systray).
 // pkg/window.PlatformWindow satisfies this implicitly.
+// Use: var w systray.WindowHandle
 type WindowHandle interface {
 	Name() string
 	Show()
diff --git a/pkg/systray/service.go b/pkg/systray/service.go
index 66e2a00..fc232ca 100644
--- a/pkg/systray/service.go
+++ b/pkg/systray/service.go
@@ -16,10 +16,7 @@ import (
 type Options struct{}
 
 // Service manages system tray operations via Core tasks.
-//
-// Example:
-//
-//	svc := &systray.Service{}
+// Use: svc := &systray.Service{}
 type Service struct {
 	*core.ServiceRuntime[Options]
 	manager  *Manager
@@ -28,10 +25,7 @@ type Service struct {
 }
 
 // OnStartup loads tray config and registers task handlers.
-//
-// Example:
-//
-//	_ = svc.OnStartup(context.Background())
+// Use: _ = svc.OnStartup(context.Background())
 func (s *Service) OnStartup(ctx context.Context) error {
 	cfg, handled, _ := s.Core().QUERY(QueryConfig{})
 	if handled {
@@ -118,6 +112,7 @@ func (s *Service) showTrayMessage(title, message string) error {
 }
 
 // Manager returns the underlying systray Manager.
+// Use: manager := svc.Manager()
 func (s *Service) Manager() *Manager {
 	return s.manager
 }
diff --git a/pkg/systray/tray.go b/pkg/systray/tray.go
index 9cd9177..7d23b2a 100644
--- a/pkg/systray/tray.go
+++ b/pkg/systray/tray.go
@@ -12,10 +12,7 @@ import (
 var defaultIcon []byte
 
 // Manager manages the system tray lifecycle.
-//
-// Example:
-//
-//	manager := systray.NewManager(platform)
+// Use: manager := systray.NewManager(platform)
 type Manager struct {
 	platform        Platform
 	tray            PlatformTray
@@ -30,10 +27,7 @@ type Manager struct {
 }
 
 // NewManager creates a systray Manager.
-//
-// Example:
-//
-//	manager := systray.NewManager(platform)
+// Use: manager := systray.NewManager(platform)
 func NewManager(platform Platform) *Manager {
 	return &Manager{
 		platform:  platform,
@@ -42,6 +36,7 @@ func NewManager(platform Platform) *Manager {
 }
 
 // Setup creates the system tray with default icon and tooltip.
+// Use: _ = manager.Setup("Core", "Core")
 func (m *Manager) Setup(tooltip, label string) error {
 	m.tray = m.platform.NewTray()
 	if m.tray == nil {
@@ -57,6 +52,7 @@ func (m *Manager) Setup(tooltip, label string) error {
 }
 
 // SetIcon sets the tray icon.
+// Use: _ = manager.SetIcon(iconBytes)
 func (m *Manager) SetIcon(data []byte) error {
 	if m.tray == nil {
 		return core.E("systray.SetIcon", "tray not initialised", nil)
@@ -67,6 +63,7 @@ func (m *Manager) SetIcon(data []byte) error {
 }
 
 // SetTemplateIcon sets the template icon (macOS).
+// Use: _ = manager.SetTemplateIcon(iconBytes)
 func (m *Manager) SetTemplateIcon(data []byte) error {
 	if m.tray == nil {
 		return core.E("systray.SetTemplateIcon", "tray not initialised", nil)
@@ -77,6 +74,7 @@ func (m *Manager) SetTemplateIcon(data []byte) error {
 }
 
 // SetTooltip sets the tray tooltip.
+// Use: _ = manager.SetTooltip("Core is ready")
 func (m *Manager) SetTooltip(text string) error {
 	if m.tray == nil {
 		return core.E("systray.SetTooltip", "tray not initialised", nil)
@@ -87,6 +85,7 @@ func (m *Manager) SetTooltip(text string) error {
 }
 
 // SetLabel sets the tray label.
+// Use: _ = manager.SetLabel("Core")
 func (m *Manager) SetLabel(text string) error {
 	if m.tray == nil {
 		return core.E("systray.SetLabel", "tray not initialised", nil)
@@ -97,6 +96,7 @@ func (m *Manager) SetLabel(text string) error {
 }
 
 // AttachWindow attaches a panel window to the tray.
+// Use: _ = manager.AttachWindow(windowHandle)
 func (m *Manager) AttachWindow(w WindowHandle) error {
 	if m.tray == nil {
 		return core.E("systray.AttachWindow", "tray not initialised", nil)
@@ -109,6 +109,7 @@ func (m *Manager) AttachWindow(w WindowHandle) error {
 }
 
 // ShowPanel shows the attached tray panel window if one is configured.
+// Use: _ = manager.ShowPanel()
 func (m *Manager) ShowPanel() error {
 	m.mu.RLock()
 	w := m.panelWindow
@@ -121,6 +122,7 @@ func (m *Manager) ShowPanel() error {
 }
 
 // HidePanel hides the attached tray panel window if one is configured.
+// Use: _ = manager.HidePanel()
 func (m *Manager) HidePanel() error {
 	m.mu.RLock()
 	w := m.panelWindow
@@ -133,11 +135,13 @@ func (m *Manager) HidePanel() error {
 }
 
 // Tray returns the underlying platform tray for direct access.
+// Use: tray := manager.Tray()
 func (m *Manager) Tray() PlatformTray {
 	return m.tray
 }
 
 // IsActive returns whether a tray has been created.
+// Use: active := manager.IsActive()
 func (m *Manager) IsActive() bool {
 	return m.tray != nil
 }
diff --git a/pkg/systray/wails.go b/pkg/systray/wails.go
index 2ebc5e3..b9e46ac 100644
--- a/pkg/systray/wails.go
+++ b/pkg/systray/wails.go
@@ -6,18 +6,25 @@ import (
 )
 
 // WailsPlatform implements Platform using Wails v3.
+// Use: platform := systray.NewWailsPlatform(app)
 type WailsPlatform struct {
 	app *application.App
 }
 
+// NewWailsPlatform creates a Wails-backed tray platform.
+// Use: platform := systray.NewWailsPlatform(app)
 func NewWailsPlatform(app *application.App) *WailsPlatform {
 	return &WailsPlatform{app: app}
 }
 
+// NewTray creates a Wails system tray handle.
+// Use: tray := platform.NewTray()
 func (wp *WailsPlatform) NewTray() PlatformTray {
 	return &wailsTray{tray: wp.app.SystemTray.New()}
 }
 
+// NewMenu creates a Wails tray menu handle.
+// Use: menu := platform.NewMenu()
 func (wp *WailsPlatform) NewMenu() PlatformMenu {
 	return &wailsTrayMenu{menu: wp.app.NewMenu()}
 }
diff --git a/pkg/window/layout.go b/pkg/window/layout.go
index 6750c36..9d3e123 100644
--- a/pkg/window/layout.go
+++ b/pkg/window/layout.go
@@ -29,6 +29,7 @@ type LayoutInfo struct {
 }
 
 // LayoutManager persists named window arrangements to ~/.config/Core/layouts.json.
+// Use: lm := window.NewLayoutManager()
 type LayoutManager struct {
 	configDir string
 	layouts   map[string]Layout
diff --git a/pkg/window/messages.go b/pkg/window/messages.go
index 8ffdaf9..e517e0c 100644
--- a/pkg/window/messages.go
+++ b/pkg/window/messages.go
@@ -255,6 +255,8 @@ type ActionWindowFocused struct{ Name string }
 // Use: _ = c.ACTION(window.ActionWindowBlurred{Name: "editor"})
 type ActionWindowBlurred struct{ Name string }
 
+// ActionFilesDropped is broadcast when files are dropped onto a window.
+// Use: _ = c.ACTION(window.ActionFilesDropped{Name: "editor", Paths: []string{"/tmp/report.pdf"}})
 type ActionFilesDropped struct {
 	Name     string   `json:"name"` // window name
 	Paths    []string `json:"paths"`
diff --git a/pkg/window/mock_platform.go b/pkg/window/mock_platform.go
index f257988..642de83 100644
--- a/pkg/window/mock_platform.go
+++ b/pkg/window/mock_platform.go
@@ -1,15 +1,20 @@
 package window
 
 // MockPlatform is an exported mock for cross-package integration tests.
+// Use: platform := window.NewMockPlatform()
 // For internal tests, use the unexported mockPlatform in mock_test.go.
 type MockPlatform struct {
 	Windows []*MockWindow
 }
 
+// NewMockPlatform creates a window platform mock.
+// Use: platform := window.NewMockPlatform()
 func NewMockPlatform() *MockPlatform {
 	return &MockPlatform{}
 }
 
+// CreateWindow creates an in-memory window for tests.
+// Use: w := platform.CreateWindow(window.PlatformWindowOptions{Name: "editor"})
 func (m *MockPlatform) CreateWindow(opts PlatformWindowOptions) PlatformWindow {
 	w := &MockWindow{
 		name: opts.Name, title: opts.Title, url: opts.URL,
@@ -23,6 +28,8 @@ func (m *MockPlatform) CreateWindow(opts PlatformWindowOptions) PlatformWindow {
 	return w
 }
 
+// GetWindows returns all tracked mock windows.
+// Use: windows := platform.GetWindows()
 func (m *MockPlatform) GetWindows() []PlatformWindow {
 	out := make([]PlatformWindow, len(m.Windows))
 	for i, w := range m.Windows {
@@ -31,6 +38,8 @@ func (m *MockPlatform) GetWindows() []PlatformWindow {
 	return out
 }
 
+// MockWindow is an in-memory window handle used by tests.
+// Use: w := &window.MockWindow{}
 type MockWindow struct {
 	name, title, url     string
 	width, height, x, y  int
diff --git a/pkg/window/platform.go b/pkg/window/platform.go
index be58dc0..37785ff 100644
--- a/pkg/window/platform.go
+++ b/pkg/window/platform.go
@@ -9,7 +9,7 @@ type Platform interface {
 }
 
 // PlatformWindowOptions are the backend-specific options passed to CreateWindow.
-// Use: opts := window.PlatformWindowOptions{Name: "editor"}
+// Use: opts := window.PlatformWindowOptions{Name: "editor", URL: "/editor"}
 type PlatformWindowOptions struct {
 	Name                string
 	Title               string
diff --git a/pkg/window/wails.go b/pkg/window/wails.go
index 006cc6d..c4c3f0b 100644
--- a/pkg/window/wails.go
+++ b/pkg/window/wails.go
@@ -7,15 +7,19 @@ import (
 )
 
 // WailsPlatform implements Platform using Wails v3.
+// Use: platform := window.NewWailsPlatform(app)
 type WailsPlatform struct {
 	app *application.App
 }
 
 // NewWailsPlatform creates a Wails-backed Platform.
+// Use: platform := window.NewWailsPlatform(app)
 func NewWailsPlatform(app *application.App) *WailsPlatform {
 	return &WailsPlatform{app: app}
 }
 
+// CreateWindow opens a new Wails window from platform options.
+// Use: w := wp.CreateWindow(window.PlatformWindowOptions{Name: "editor", URL: "/editor"})
 func (wp *WailsPlatform) CreateWindow(opts PlatformWindowOptions) PlatformWindow {
 	wOpts := application.WebviewWindowOptions{
 		Name:             opts.Name,
@@ -40,6 +44,8 @@ func (wp *WailsPlatform) CreateWindow(opts PlatformWindowOptions) PlatformWindow
 	return &wailsWindow{w: w, title: opts.Title}
 }
 
+// GetWindows returns the live Wails windows.
+// Use: windows := wp.GetWindows()
 func (wp *WailsPlatform) GetWindows() []PlatformWindow {
 	all := wp.app.Window.GetAll()
 	out := make([]PlatformWindow, 0, len(all))