Sync with testing.

AGENTS.md

@@ -44,7 +44,7 @@ Expose GUI controls through accessibility APIs. Keep outer preferences combo wid
 
 ## Testing Guidelines
 
-Use Go's `testing` package, `*_test.go`, and `TestBehavior` functions. Start with the affected package. Use deterministic synchronization and generic fixtures. Native checks need their relevant harness, such as `python3 tests/native_atspi.py`. No numeric coverage target is configured. Report automated, installed-binary, physical-input, audible-speech, and Braille-display checks separately.
+Use Go's `testing` package, `*_test.go`, and `TestBehavior` functions. Start with the affected package. Use deterministic synchronization and generic fixtures. Native checks need their relevant harness, such as `python3 tests/native_atspi.py`. Specify a 24-bit Xvfb screen for Qt fixtures: Slint's `xvfb-run` defaults to 8-bit, which can crash Qt text-cursor painting. No numeric coverage target is configured. Report automated, installed-binary, physical-input, audible-speech, and Braille-display checks separately.
 
 For performance work, run the relevant `BenchmarkBehavior` functions before and after changes using repeated runs and allocation reporting. Add or expand representative benchmarks when investigating a new bottleneck; keep fixture construction outside timed loops and check that the intended work actually happens. Preserve announcement content, ordering, interruption, focus, and Braille behavior. Benchmark timing alone does not establish a bug or live responsiveness, and noisy timing changes must not become automatic pass/fail thresholds. See [benchmark procedures](docs/testing/benchmarks.md) for commands and measurement limits. Plain `go test` does not run benchmarks.
 

docs/testing/qt-control-states.md

@@ -55,6 +55,52 @@ go test ./internal/atspi ./internal/presentation ./internal/app -count=1
 CTHULHU_NATIVE_BROWSER_TESTS=menu /usr/bin/python3 tests/native_browser.py
 ```
 
+## Editable combos with read-only editors
+
+Some Qt applications make a combo editable, then make its internal line edit
+read-only. Qt can expose that child with both EDITABLE and READ_ONLY states.
+Closed Up/Down navigation sends child caret events followed by a name/value
+event from the combo. A caret event can arrive without a new focus event.
+
+On Slint with Qt/PySide6 6.9.3 and AT-SPI 2.58.1, querying the word at that
+child's caret reproduced an 800 ms timeout, followed by stale list-item
+queries and loss of further accessibility events. Cthulhu identifies these
+children using READ_ONLY plus a direct combo parent, copies that parent's
+identity into each caret snapshot, and omits the unused word query. It keeps
+native focus on the combo and lets its name/value event present the selection.
+This does not depend on the last caret/focus event or on a coalescing delay.
+Writable combo editors and standalone read-only text fields retain word capture.
+
+The app event loop suppresses a child caret only when its copied combo identity
+matches the owned focus. Normal foreground checks still apply. Popup selection
+followed by focus is presented once, and deselection of the previous managed
+item does not replace the current item. Deselection of the current focused
+item remains audible.
+
+Run the isolated regression with:
+
+```sh
+python3 tests/native_toby_combo.py
+```
+
+This requires PySide6, Xvfb, xdotool and the native Go build dependencies. It
+explicitly uses a 24-bit screen; Slint's 8-bit Xvfb default can crash Qt's text
+cursor painter before accessibility checks complete. Fixture diagnostics are
+saved in the printed `/tmp/cthulhu-combo-qt-*.log` path. The test
+checks consecutive closed arrows, Home/End, popup Return and Escape,
+Tab/Shift+Tab after each close, and word capture in writable fields, standalone
+read-only fields and writable combo editors. It waits for each provider event
+instead of filling the adapter queue with an unobserved key sequence. Snapshot
+timings are reported for diagnosis, without a machine-speed pass threshold.
+
+For live acceptance, repeat those keys in Toby Doom Launcher for both IWAD and
+game choices. Confirm each new value is spoken once, navigation continues after
+several changes, and Tab/Shift+Tab still reaches narration and buttons. In an
+ordinary text field and writable combo, check typing and Ctrl+Left/Right word
+reading. Switch away with a popup open and confirm background events do not
+interrupt the new foreground application. Check a physical Braille display when
+available; private event tests do not establish audible or physical output.
+
 ## Providers which omit checkability
 
 The tested Mumble 1.5.939 / Qt 5 installation exports Mute Self and Deafen Self

internal/app/event_accessibility.go

@@ -100,6 +100,7 @@ func (handler *accessibilityEventHandler) handle(event atspi.Event) {
 			"snapshot_duration", event.SnapshotDuration,
 			"editable", event.Source.Editable,
 			"editable_root", event.Source.EditableRoot.Path,
+			"read_only_combo", event.Source.ReadOnlyCombo.Path,
 			"autocomplete", event.Source.Autocomplete,
 			"autocomplete_popup", event.Source.AutocompletePopup,
 			"event_detail1", event.Detail1,

internal/app/event_caret.go

@@ -21,6 +21,13 @@ func (handler *accessibilityEventHandler) handleCaret(event atspi.Event, activit
 	objectReview := handler.objectReview
 	debounce := handler.debounce
 	if event.Type == atspi.CaretEvent {
+		if event.Source.ReadOnlyCombo.Valid() && event.Source.ReadOnlyCombo == state.focusedID &&
+			state.current.ID() == state.focusedID && state.current.Role == "combo box" {
+			// The combo's name/value event presents this selection, even when
+			// provider requests delay it past the normal caret coalescing time.
+			logger.Debug("skipped read-only combo editor caret", "combo_path", event.Source.ReadOnlyCombo.Path)
+			return true
+		}
 		if event.Source.ID() == state.selectionCaretID {
 			state.selectionCaretID = atspi.ObjectID{}
 			if activity.Sequence == state.selectionCaretSequence && time.Since(state.selectionCaretAt) < 150*time.Millisecond {

internal/app/event_caret_test.go

@@ -20,10 +20,12 @@ package app
 import (
 	"context"
 	"log/slog"
+	"reflect"
 	"testing"
 	"time"
 
 	"git.stormux.org/storm/cthulhu/internal/atspi"
+	"git.stormux.org/storm/cthulhu/internal/input"
 )
 
 func TestProcessEventsSpeaksChangedCaretLines(t *testing.T) {
@@ -101,6 +103,59 @@ func TestProcessEventsSuppressesCaretAfterEditableTextChange(t *testing.T) {
 	<-completed
 }
 
+func TestProcessEventsReadOnlyComboUsesNameInsteadOfEditorCaret(t *testing.T) {
+	speech := &fakeSpeechQueue{spoken: make(chan string, 16)}
+	adapter := &fakeAdapter{events: make(chan atspi.Event, 16)}
+	combo := atspi.Snapshot{BusName: ":1.7", Path: "/combo", Role: "combo box", Name: "Classic Doom", Focused: true}
+	adapter.events <- atspi.NewEvent(atspi.FocusEvent, combo)
+	editor := atspi.Snapshot{BusName: combo.BusName, Path: "/combo/editor", Role: "text", Text: "Funny Pack - Classic Doom",
+		BrailleLine: "Funny Pack - Classic Doom", TextCaretKnown: true, Editable: true, ReadOnly: true,
+		Focused: true, ReadOnlyCombo: combo.ID()}
+	for _, value := range []string{"Funny Pack - Classic Doom", "Toby Doom", "Classic Doom"} {
+		editor.Text, editor.BrailleLine = value, value
+		adapter.events <- atspi.NewEvent(atspi.CaretEvent, editor)
+		combo.Name = value
+		adapter.events <- atspi.NewEvent(atspi.AccessibleNameEvent, combo)
+	}
+	close(adapter.events)
+	processEvents(context.Background(), slog.New(slog.DiscardHandler), speech, adapter, 0)
+	close(speech.spoken)
+	var got []string
+	for text := range speech.spoken {
+		got = append(got, text)
+	}
+	want := []string{"Classic Doom, combo box", "Funny Pack - Classic Doom", "Toby Doom", "Classic Doom"}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("combo speech = %q, want %q", got, want)
+	}
+}
+
+func TestReadOnlyComboCaretRequiresExactOwnedCombo(t *testing.T) {
+	combo := atspi.Snapshot{BusName: ":1.7", Path: "/combo", Role: "combo box"}
+	for _, test := range []struct {
+		name  string
+		owner atspi.ObjectID
+		skip  bool
+	}{
+		{"owned", combo.ID(), true},
+		{"different combo", atspi.NewObjectID(combo.BusName, "/other-combo"), false},
+		{"different provider", atspi.NewObjectID(":1.8", combo.Path), false},
+		{"ordinary editor", atspi.ObjectID{}, false},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			state := &eventLoopState{}
+			state.current, state.focusedID = combo, combo.ID()
+			handler := accessibilityEventHandler{state: state, logger: slog.New(slog.DiscardHandler), debounce: time.Hour}
+			event := atspi.NewEvent(atspi.CaretEvent, atspi.Snapshot{BusName: combo.BusName, Path: "/editor", Role: "text", ReadOnlyCombo: test.owner})
+			handler.handleCaret(event, input.Activity{}, input.NoIntent)
+			defer state.pending.clear()
+			if skipped := state.pending.caret.event.Type == ""; skipped != test.skip {
+				t.Fatalf("caret skipped = %v, want %v", skipped, test.skip)
+			}
+		})
+	}
+}
+
 func TestProcessEventsSpeaksCaretCharacters(t *testing.T) {
 	speech := &fakeSpeechQueue{spoken: make(chan string, 3)}
 	adapter := &fakeAdapter{events: make(chan atspi.Event, 3)}

internal/app/event_focus.go

@@ -33,11 +33,13 @@ func (handler *accessibilityEventHandler) acceptFocusedEvent(event atspi.Event,
 	// Compare with the owned focus snapshot, not the last speech request:
 	// a state/value update can intervene between two toolkit focus events.
 	// Still refresh review and braille below before suppressing presentation.
+	managedSelectionFocus := isFocusGainEvent(event) && state.managedDescendantID.Valid() &&
+		event.Source.ID() == state.managedDescendantID && sameSelectionItem(event.Source, state.current)
 	duplicateFocus := (event.Type == atspi.FocusEvent || event.Type == atspi.FocusedStateEvent && event.Detail1 != 0) &&
 		event.Source.Role != "terminal" && !presentsReusedRow(event.Source) &&
 		!(state.pendingPromptWindow.Valid() && event.Window == state.pendingPromptWindow) &&
-		state.focusedID.Valid() && event.Source.ID() == state.focusedID &&
+		((state.focusedID.Valid() && event.Source.ID() == state.focusedID &&
-		event.Source.ID() == state.current.ID() &&
+			event.Source.ID() == state.current.ID()) || managedSelectionFocus) &&
 		presentation.FocusTextWithOptions(event.Source, state.presentationOptions) == presentation.FocusTextWithOptions(state.current, state.presentationOptions) &&
 		slices.Equal(presentation.SoundCues(event.Source, state.presentationOptions), presentation.SoundCues(state.current, state.presentationOptions))
 	if isFocusEvent(event.Type) {
@@ -93,6 +95,11 @@ func (handler *accessibilityEventHandler) acceptFocusedEvent(event atspi.Event,
 			logger.Debug("skipped selection already presented by focus", "role", event.Source.Role)
 			return true
 		}
+	} else if event.Type == atspi.SelectedStateEvent && !event.Source.Selected &&
+		(event.Source.Role == "tree item" || event.Source.Role == "list item") &&
+		state.managedDescendantID.Valid() && event.Source.ID() != state.managedDescendantID {
+		logger.Debug("skipped deselected previous managed descendant", "role", event.Source.Role)
+		return true
 	} else if (isStateChangeEvent(event.Type) || isValueChangeEvent(event.Type)) &&
 		(state.focusedID.Path == "" || event.Source.ID() != state.focusedID) {
 		logger.Debug("skipped event outside focused object", "type", event.Type, "role", event.Source.Role)

internal/app/event_focus_test.go

@@ -67,6 +67,52 @@ func TestProcessEventsSuppressesDuplicateFocusObjects(t *testing.T) {
 	}
 }
 
+func TestProcessEventsSuppressesQtPopupSelectionRepeats(t *testing.T) {
+	speech := &fakeSpeechQueue{spoken: make(chan string, 8)}
+	adapter := &fakeAdapter{events: make(chan atspi.Event, 8)}
+	ctx, cancel := context.WithCancel(context.Background())
+	done := make(chan struct{})
+	go func() {
+		processEvents(ctx, slog.New(slog.DiscardHandler), speech, adapter, 0)
+		close(done)
+	}()
+	defer func() { cancel(); <-done }()
+
+	list := atspi.Snapshot{BusName: ":1.7", Path: "/combo/list", Role: "list"}
+	adapter.events <- atspi.NewEvent(atspi.FocusEvent, list)
+	if got := <-speech.spoken; got != "list" {
+		t.Fatalf("list focus speech = %q", got)
+	}
+	item := func(path, name string) atspi.Snapshot {
+		return atspi.Snapshot{BusName: list.BusName, Path: path, Role: "list item", Name: name, Focused: true, Selected: true}
+	}
+	first := item("/combo/list/1", "Classic Doom")
+	adapter.events <- atspi.NewManagedDescendantEvent(atspi.SelectionChangedEvent, list.Path, first)
+	if got := <-speech.spoken; got != "Classic Doom, list item, selected" {
+		t.Fatalf("first selection speech = %q", got)
+	}
+	firstFocus := atspi.NewEvent(atspi.FocusedStateEvent, first)
+	firstFocus.Detail1 = 1
+	adapter.events <- firstFocus
+
+	second := item("/combo/list/2", "Funny Pack - Toby Doom")
+	adapter.events <- atspi.NewManagedDescendantEvent(atspi.SelectionChangedEvent, list.Path, second)
+	if got := <-speech.spoken; got != "Funny Pack - Toby Doom, list item, selected" {
+		t.Fatalf("second selection speech = %q", got)
+	}
+	first.Focused, first.Selected = false, false
+	adapter.events <- atspi.NewEvent(atspi.SelectedStateEvent, first)
+	secondFocus := atspi.NewEvent(atspi.FocusedStateEvent, second)
+	secondFocus.Detail1 = 1
+	adapter.events <- secondFocus
+
+	select {
+	case got := <-speech.spoken:
+		t.Fatalf("Qt popup selection repeated as %q", got)
+	case <-time.After(50 * time.Millisecond):
+	}
+}
+
 func TestProcessEventsSuppressesUnfocusedNameChangesDuringFileNavigation(t *testing.T) {
 	speech := &fakeSpeechQueue{spoken: make(chan string, 8)}
 	adapter := &fakeAdapter{events: make(chan atspi.Event, 8)}

internal/atspi/adapter_event_callback_native.go

@@ -114,6 +114,12 @@ func (adapter *Adapter) captureNativeEventSnapshot(event *C.AtspiEvent, target *
 		captureCaret = role != C.ATSPI_ROLE_DOCUMENT_WEB && role != C.ATSPI_ROLE_DOCUMENT_FRAME && role != C.ATSPI_ROLE_EMBEDDED
 	}
 	snapshot := snapshotFromNativeWithCaret(target, captureCaret, eventType == CaretEvent, false, adapter.captureSound.Load(), adapter.captureTextAttributes.Load())
+	if eventType == CaretEvent {
+		if combo := C.cthulhu_read_only_combo(target); combo != nil {
+			snapshot.ReadOnlyCombo = nativeObjectID(combo)
+			C.g_object_unref(C.gpointer(combo))
+		}
+	}
 	if snapshot.Editable && (eventType == CaretEvent || eventType == TextInsertedEvent ||
 		eventType == TextDeletedEvent || eventType == TextSelectionChangedEvent) {
 		if editor := C.cthulhu_editable_root(target); editor != nil {
@@ -212,7 +218,10 @@ func (adapter *Adapter) captureNativeEventSnapshot(event *C.AtspiEvent, target *
 		}
 	}
 
-	if eventType == CaretEvent && snapshot.Role != "password text" {
+	// A read-only combo child only mirrors the chosen value. Qt 6.9 can stop
+	// answering accessibility requests after its word-at-caret query; no word
+	// feedback is needed for this non-writable selection proxy.
+	if eventType == CaretEvent && snapshot.Role != "password text" && !snapshot.ReadOnlyCombo.Valid() {
 		word := C.cthulhu_capture_caret_unit(target, C.ATSPI_TEXT_GRANULARITY_WORD)
 		snapshot.CaretWord = sanitizeSnapshotField(C.GoString(word))
 		C.g_free(C.gpointer(word))
@@ -559,7 +568,7 @@ func cthulhuAtspiEventCallback(event *C.AtspiEvent, userData unsafe.Pointer) {
 		focusEvent.Window = originID
 	}
 	if !focusEvent.ForegroundMismatch && !snapshot.Defunct && snapshot.Role != "invalid" {
-		if shouldRetainNativeFocus(eventType, focusEvent.Detail1, chromeFocus) &&
+		if shouldRetainNativeFocus(eventType, focusEvent.Detail1, chromeFocus) && !snapshot.ReadOnlyCombo.Valid() &&
 			!(eventType == SelectionChangedEvent && focusEvent.Source.LibreOffice != nil && focusEvent.Source.LibreOffice.InSpreadsheet) {
 			adapter.rememberNativeFocus(target, snapshot.ID())
 		}

internal/atspi/adapter_events.c

@@ -746,6 +746,28 @@ AtspiAccessible *cthulhu_editable_root(AtspiAccessible *source) {
     return NULL;
 }
 
+// Qt exposes an editable combo's read-only line edit as TEXT with EDITABLE
+// still set. Require READ_ONLY and a direct combo parent; an unrelated editor
+// in the same application must keep ordinary caret and word navigation.
+AtspiAccessible *cthulhu_read_only_combo(AtspiAccessible *source) {
+    if (source == NULL) return NULL;
+    AtspiRole role = atspi_accessible_get_role(source, NULL);
+    if (role != ATSPI_ROLE_TEXT && role != ATSPI_ROLE_ENTRY) return NULL;
+    AtspiStateSet *states = atspi_accessible_get_state_set(source);
+    gboolean readOnly = states != NULL &&
+        atspi_state_set_contains(states, ATSPI_STATE_READ_ONLY) &&
+        !atspi_state_set_contains(states, ATSPI_STATE_DEFUNCT);
+    if (states != NULL) g_object_unref(states);
+    if (!readOnly) return NULL;
+    GError *error = NULL;
+    AtspiAccessible *parent = atspi_accessible_get_parent(source, &error);
+    if (error == NULL && parent != NULL &&
+        atspi_accessible_get_role(parent, NULL) == ATSPI_ROLE_COMBO_BOX) return parent;
+    g_clear_error(&error);
+    if (parent != NULL) g_object_unref(parent);
+    return NULL;
+}
+
 // Chromium can detach an existing document from its frame's AT-SPI parent
 // chain while returning to a tab. Its document identity remains usable.
 AtspiAccessible *cthulhu_document_ancestor(AtspiAccessible *source) {

internal/atspi/adapter_native.h

@@ -142,6 +142,7 @@ AtspiAccessible *cthulhu_window_ancestor(AtspiAccessible *source);
 gboolean cthulhu_may_be_background_notification(AtspiAccessible *source);
 AtspiAccessible *cthulhu_document_ancestor(AtspiAccessible *source);
 AtspiAccessible *cthulhu_editable_root(AtspiAccessible *source);
+AtspiAccessible *cthulhu_read_only_combo(AtspiAccessible *source);
 AtspiEventListenerCB cthulhu_event_callback_pointer(void);
 gboolean cthulhu_request_event_loop_quit(void);
 gboolean cthulhu_request_tree_capture(gpointer userData);

internal/atspi/model.go

@@ -93,7 +93,10 @@ type Snapshot struct {
 	Editable         bool
 	// EditableRoot identifies the nearest focusable writable editor or editable
 	// web document. Paragraph events can belong to its native focus.
-	EditableRoot     ObjectID
+	EditableRoot ObjectID
+	// ReadOnlyCombo identifies the direct combo parent of a read-only text
+	// child. Its caret changes mirror selection; the combo owns presentation.
+	ReadOnlyCombo    ObjectID
 	Expandable       bool
 	Expanded         bool
 	Indeterminate    bool

internal/atspi/toby_combo_native_test.go

@@ -0,0 +1,149 @@
+// Cthulhu screen reader.
+// Copyright (c) 2026 Storm Dragon
+// Authors: Storm Dragon, Angus Kola
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package atspi
+
+import (
+	"context"
+	"os"
+	"os/exec"
+	"testing"
+	"time"
+)
+
+func TestNativeTobyComboPopupLifetime(t *testing.T) {
+	if os.Getenv("CTHULHU_NATIVE_TOBY_COMBO") != "1" {
+		t.Skip("requires isolated Toby combo fixture")
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+	adapter := New()
+	if err := adapter.Start(ctx); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		stopCtx, stopCancel := context.WithTimeout(context.Background(), 3*time.Second)
+		defer stopCancel()
+		if err := adapter.Stop(stopCtx); err != nil {
+			t.Error(err)
+		}
+	}()
+	if _, err := adapter.CaptureDesktop(ctx); err != nil {
+		t.Fatal(err)
+	}
+	key := func(keys ...string) {
+		t.Helper()
+		arguments := append([]string{"key", "--delay", "120"}, keys...)
+		if err := exec.CommandContext(ctx, "xdotool", arguments...).Run(); err != nil {
+			t.Fatal(err)
+		}
+	}
+	var combo ObjectID
+	var comboCarets int
+	var slowest time.Duration
+	wait := func(description string, match func(Event) bool) Event {
+		t.Helper()
+		deadline := time.NewTimer(4 * time.Second)
+		defer deadline.Stop()
+		var recent []string
+		for {
+			select {
+			case event := <-adapter.Events():
+				if event.Source.ApplicationName != "toby_combo_fixture.py" {
+					continue
+				}
+				recent = append(recent, event.Type+" "+event.Source.Role+" "+event.Source.Name)
+				if len(recent) > 12 {
+					recent = recent[1:]
+				}
+				slowest = max(slowest, event.SnapshotDuration)
+				if event.Type == CaretEvent && event.Source.ReadOnlyCombo.Valid() {
+					comboCarets++
+					if event.Source.ReadOnlyCombo != combo || event.Source.CaretWord != "" {
+						t.Fatalf("read-only combo caret: owner=%v word=%q", event.Source.ReadOnlyCombo, event.Source.CaretWord)
+					}
+				}
+				if match(event) {
+					return event
+				}
+			case <-deadline.C:
+				t.Fatalf("missing %s; recent events: %q; background filtered=%d", description, recent, adapter.backgroundEventsFiltered.Load())
+			case <-ctx.Done():
+				t.Fatal(ctx.Err())
+			}
+		}
+	}
+	focus := func(role, name string) Event {
+		t.Helper()
+		return wait("focus on "+role+" "+name, func(event Event) bool {
+			return event.Type == FocusedStateEvent && event.Detail1 == 1 &&
+				event.Source.Role == role && event.Source.Name == name
+		})
+	}
+	name := func(value string) Event {
+		t.Helper()
+		return wait("combo value "+value, func(event Event) bool {
+			return event.Type == AccessibleNameEvent && event.Source.Role == "combo box" && event.Source.Name == value
+		})
+	}
+	// Closed arrows produce consecutive caret events without another combo
+	// focus event between them. This was missing from the popup-only probe.
+	key("Tab", "shift+Tab")
+	combo = focus("combo box", "Classic Doom").Source.ID()
+	for _, step := range []struct{ key, value string }{
+		{"Down", "Bring Back the 90s"}, {"Down", "Funny Pack - Toby Doom"},
+		{"Up", "Bring Back the 90s"}, {"Up", "Classic Doom"},
+		{"End", "Funny Pack - Toby Doom"}, {"Home", "Classic Doom"},
+	} {
+		key(step.key)
+		name(step.value)
+	}
+	if comboCarets < 4 {
+		t.Fatalf("only %d read-only combo caret events observed", comboCarets)
+	}
+	for _, closeKey := range []string{"Return", "Escape"} {
+		key("alt+Down")
+		focus("list", "")
+		key("Down")
+		wait("popup selection", func(event Event) bool {
+			return event.Type == SelectionChangedEvent && event.Source.Role == "list item" && event.Source.Selected
+		})
+		key(closeKey)
+		wait("combo focus after "+closeKey, func(event Event) bool {
+			return event.Type == FocusedStateEvent && event.Detail1 == 1 && event.Source.ID() == combo
+		})
+		key("Tab")
+		focus("button", "Launch")
+		key("shift+Tab")
+		wait("return to combo", func(event Event) bool {
+			return event.Type == FocusedStateEvent && event.Detail1 == 1 && event.Source.ID() == combo
+		})
+	}
+	key("Tab")
+	focus("button", "Launch")
+	// Other text controls still need native word capture, including read-only
+	// fields outside combos and writable combo editors in this same provider.
+	for _, control := range []struct{ role, name string }{
+		{"text", "Plain editor"}, {"text", "Read-only text"}, {"combo box", "alpha beta"},
+	} {
+		key("Tab")
+		// Qt can expose entry into a line edit only through a text-selection
+		// event, without refreshing libatspi's focused state or emitting focus.
+		wait("entry into "+control.name, func(event Event) bool {
+			return event.Source.Role == control.role && event.Source.Name == control.name
+		})
+		key("Home", "ctrl+Right")
+		caret := wait("word caret in "+control.name, func(event Event) bool {
+			return event.Type == CaretEvent && event.Source.CaretWord == "beta"
+		})
+		if caret.Source.ReadOnlyCombo.Valid() {
+			t.Fatalf("ordinary text caret acquired combo selection owner: %+v", caret.Source)
+		}
+	}
+	if dropped := adapter.Overflow(); dropped != 0 {
+		t.Fatalf("native event queue dropped %d events", dropped)
+	}
+	t.Logf("closed arrows, Home/End, popup Return/Escape and text navigation completed; slowest snapshot %s", slowest)
+}

tests/native_toby_combo.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+# Copyright (c) 2026 Storm Dragon
+# Authors: Storm Dragon, Angus Kola
+# SPDX-License-Identifier: GPL-3.0-or-later
+"""Exercise Toby's editable read-only combo under a private AT-SPI session."""
+import os
+from pathlib import Path
+import site
+import subprocess
+import sys
+import tempfile
+import time
+
+from native_test_session import run_private_session
+
+
+def wait_for_window():
+    deadline = time.monotonic() + 5
+    while time.monotonic() < deadline:
+        result = subprocess.run(
+            ["xdotool", "search", "--onlyvisible", "--name", "^Toby combo probe$"],
+            capture_output=True, text=True,
+        )
+        if result.stdout.strip():
+            return result.stdout.strip().splitlines()[0]
+        time.sleep(0.05)
+    raise RuntimeError("Toby combo fixture window missing")
+
+
+def run_inside():
+    root = Path(__file__).resolve().parents[1]
+    diagnostics = tempfile.NamedTemporaryFile(prefix="cthulhu-combo-qt-", suffix=".log", delete=False)
+    print("Qt fixture diagnostics:", diagnostics.name, flush=True)
+    fixture = subprocess.Popen(
+        [sys.executable, root / "tests" / "toby_combo_fixture.py"],
+        stderr=diagnostics,
+        stdout=diagnostics,
+    )
+    try:
+        window = wait_for_window()
+        subprocess.run(["xdotool", "windowfocus", "--sync", window], check=True)
+        from native_x11 import set_active_window
+        set_active_window(int(window))
+        subprocess.run(
+            ["go", "test", "./internal/atspi", "-run", "^TestNativeTobyComboPopupLifetime$",
+             "-count=1", "-v", "-timeout=45s"],
+            cwd=root, check=True, timeout=60,
+            env=dict(os.environ, CTHULHU_NATIVE_TOBY_COMBO="1", GOCACHE="/tmp/cthulhu-cache"),
+        )
+    finally:
+        exited = fixture.poll() is not None
+        if not exited:
+            fixture.terminate()
+        fixture.wait(timeout=5)
+        diagnostics.close()
+        if exited:
+            raise RuntimeError(f"Qt fixture exited with status {fixture.returncode}; see {diagnostics.name}")
+
+
+if __name__ == "__main__":
+    if "--inside" in sys.argv:
+        run_inside()
+    else:
+        with tempfile.TemporaryDirectory(prefix="cthulhu-toby-combo-") as temporary:
+            environment = dict(
+                os.environ,
+                HOME=temporary,
+                XDG_CONFIG_HOME=temporary,
+                XDG_CACHE_HOME=temporary,
+                XDG_DATA_HOME=temporary,
+                QT_QPA_PLATFORM="xcb",
+                QT_LINUX_ACCESSIBILITY_ALWAYS_ON="1",
+                NO_AT_BRIDGE="0",
+                PYTHONPATH=site.getusersitepackages(),
+                GOMODCACHE=subprocess.check_output(
+                    ["go", "env", "GOMODCACHE"], text=True
+                ).strip(),
+            )
+            environment.pop("AT_SPI_BUS_ADDRESS", None)
+            run_private_session(
+                ["xvfb-run", "-a", "-s", "-screen 0 1024x768x24", "dbus-run-session", "--", sys.executable,
+                 __file__, "--inside"],
+                env=environment, check=True,
+            )

tests/toby_combo_fixture.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+# Copyright (c) 2026 Storm Dragon
+# Authors: Storm Dragon, Angus Kola
+# SPDX-License-Identifier: GPL-3.0-or-later
+"""Minimal Toby Doom Launcher combo-box fixture for native diagnostics."""
+from PySide6.QtCore import Qt
+from PySide6.QtWidgets import QApplication, QComboBox, QLabel, QLineEdit, QPushButton, QVBoxLayout, QWidget
+
+
+class AccessibleComboBox(QComboBox):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setEditable(True)
+        self.lineEdit().setReadOnly(True)
+        self.pageStep = 5
+
+    def keyPressEvent(self, event):
+        current_index = self.currentIndex()
+        item_count = self.count()
+        if event.key() == Qt.Key_PageUp:
+            self.setCurrentIndex(max(0, current_index - self.pageStep))
+        elif event.key() == Qt.Key_PageDown:
+            self.setCurrentIndex(min(item_count - 1, current_index + self.pageStep))
+        elif event.key() == Qt.Key_Home:
+            self.setCurrentIndex(0)
+            self.setFocus()
+            self.currentIndexChanged.emit(0)
+            self.activated.emit(0)
+        elif event.key() == Qt.Key_End:
+            last_index = item_count - 1
+            self.setCurrentIndex(last_index)
+            self.setFocus()
+            self.currentIndexChanged.emit(last_index)
+            self.activated.emit(last_index)
+        else:
+            super().keyPressEvent(event)
+
+
+application = QApplication([])
+window = QWidget()
+window.setWindowTitle("Toby combo probe")
+layout = QVBoxLayout(window)
+label = QLabel("Game")
+combo = AccessibleComboBox()
+combo.setAccessibleName("Game")
+combo.addItems(("Classic Doom", "Bring Back the 90s", "Funny Pack - Toby Doom"))
+label.setBuddy(combo)
+layout.addWidget(label)
+layout.addWidget(combo)
+button = QPushButton("Launch")
+layout.addWidget(button)
+editor = QLineEdit("alpha beta")
+editor.setAccessibleName("Plain editor")
+layout.addWidget(editor)
+read_only = QLineEdit("alpha beta")
+read_only.setReadOnly(True)
+read_only.setAccessibleName("Read-only text")
+layout.addWidget(read_only)
+writable_combo = QComboBox()
+writable_combo.setEditable(True)
+writable_combo.addItems(("alpha beta", "gamma delta"))
+layout.addWidget(writable_combo)
+window.resize(420, 300)
+window.show()
+combo.setFocus()
+application.exec()