That does it, I'm breaking out codex on this one. Take that tab completion!

tests/unit/test_tab_completion_manager.py

@@ -1,4 +1,6 @@
+import importlib.util
 import time
+from pathlib import Path
 from unittest.mock import Mock
 
 import pytest
@@ -14,6 +16,8 @@ def _build_env(old_text="", cursor=None, screen="pty"):
         "event_name": "KEY_TAB",
         "event_state": 1,
     }
+    input_manager.get_last_deepest_input.return_value = [["KEY_TAB"]]
+    input_manager.get_last_input_time.return_value = time.time()
     env = {
         "runtime": {
             "InputManager": input_manager,
@@ -32,6 +36,23 @@ def _build_env(old_text="", cursor=None, screen="pty"):
     return manager, env, input_manager
 
 
+def _load_large_insertion_module():
+    module_path = (
+        Path(__file__).resolve().parents[2]
+        / "src"
+        / "fenrirscreenreader"
+        / "commands"
+        / "onCursorChange"
+        / "55000-large_insertion_echo.py"
+    )
+    spec = importlib.util.spec_from_file_location(
+        "fenrir_large_insertion_echo", module_path
+    )
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
 def _set_screen_update(env, text, cursor, delta="", typing=False):
     env["screen"]["new_content_text"] = text
     env["screen"]["new_cursor"] = cursor.copy()
@@ -124,7 +145,108 @@ def test_non_tab_key_does_not_capture():
         "event_name": "KEY_A",
         "event_state": 1,
     }
+    input_manager.get_last_deepest_input.return_value = [["KEY_A"]]
 
     manager.capture_if_tab()
 
     assert env["commandBuffer"]["tabCompletion"]["pending"] is None
+
+
+@pytest.mark.unit
+def test_recent_tab_screen_update_works_without_key_input_snapshot():
+    manager, env, input_manager = _build_env(
+        "cd Documents/".ljust(20), {"x": 13, "y": 0}
+    )
+    input_manager.get_last_event.return_value = {
+        "event_name": "KEY_TAB",
+        "event_state": 0,
+    }
+    env["screen"]["old_content_text"] = "cd Do".ljust(20)
+    env["screen"]["old_cursor"] = {"x": 5, "y": 0}
+    env["commandBuffer"]["tabCompletion"]["pending"] = None
+    _set_screen_update(
+        env,
+        "cd Documents/".ljust(20),
+        {"x": 13, "y": 0},
+        delta="cuments/",
+        typing=True,
+    )
+
+    assert manager.process_update() == "cuments/"
+
+
+@pytest.mark.unit
+def test_large_insertion_echo_speaks_pasted_cursor_text():
+    large_insertion_module = _load_large_insertion_module()
+    output_manager = Mock(present_text=Mock())
+    settings_manager = Mock()
+    settings_manager.get_setting_as_bool.return_value = False
+    input_manager = Mock()
+    input_manager.get_last_deepest_input.return_value = []
+    input_manager.get_last_event.return_value = None
+    screen_manager = Mock(
+        is_screen_change=Mock(return_value=False),
+        is_delta=Mock(return_value=True),
+    )
+    env = {
+        "runtime": {
+            "InputManager": input_manager,
+            "OutputManager": output_manager,
+            "ScreenManager": screen_manager,
+            "SettingsManager": settings_manager,
+        },
+        "screen": {
+            "old_cursor": {"x": 2, "y": 0},
+            "new_cursor": {"x": 13, "y": 0},
+            "new_delta": "hello world",
+        },
+    }
+    command = large_insertion_module.command()
+    command.initialize(env)
+
+    command.run()
+
+    output_manager.present_text.assert_called_once_with(
+        "hello world",
+        interrupt=True,
+        announce_capital=True,
+        flush=False,
+    )
+
+
+@pytest.mark.unit
+def test_large_insertion_echo_defers_recent_tab_to_tab_completion():
+    large_insertion_module = _load_large_insertion_module()
+    output_manager = Mock(present_text=Mock())
+    settings_manager = Mock()
+    settings_manager.get_setting_as_bool.return_value = False
+    input_manager = Mock()
+    input_manager.get_last_deepest_input.return_value = [["KEY_TAB"]]
+    input_manager.get_last_event.return_value = {
+        "event_name": "KEY_TAB",
+        "event_state": 1,
+    }
+    input_manager.get_last_input_time.return_value = time.time()
+    screen_manager = Mock(
+        is_screen_change=Mock(return_value=False),
+        is_delta=Mock(return_value=True),
+    )
+    env = {
+        "runtime": {
+            "InputManager": input_manager,
+            "OutputManager": output_manager,
+            "ScreenManager": screen_manager,
+            "SettingsManager": settings_manager,
+        },
+        "screen": {
+            "old_cursor": {"x": 5, "y": 0},
+            "new_cursor": {"x": 13, "y": 0},
+            "new_delta": "cuments/",
+        },
+    }
+    command = large_insertion_module.command()
+    command.initialize(env)
+
+    command.run()
+
+    output_manager.present_text.assert_not_called()