diff --git a/src/local_transcriber/cli.py b/src/local_transcriber/cli.py
index 7e23466..5a6a04a 100644
--- a/src/local_transcriber/cli.py
+++ b/src/local_transcriber/cli.py
@@ -11,7 +11,13 @@ import typer
 from rich.console import Console
 from rich.status import Status
 
-from .config import ConfigValue, apply_device_defaults, load_config, resolve_defaults
+from .config import (
+    CliValues,
+    ResolvedConfig,
+    apply_device_defaults,
+    load_config,
+    resolve_defaults,
+)
 from .context_menu import install_menu as install_context_menu
 from .context_menu import uninstall_menu as uninstall_context_menu
 from .diarization import build_speaker_transcript
@@ -337,7 +343,7 @@ def main(
 
     try:
         config = load_config()
-        cli_values = {
+        cli_values: CliValues = {
             "model": model,
             "language": language,
             "device": device,
@@ -417,7 +423,7 @@ def main(
 
 def _run_single(
     file: Path,
-    defaults: dict[str, ConfigValue],
+    defaults: ResolvedConfig,
     output: Path | None,
     verbose: bool,
     compute_type_explicit: bool = False,
@@ -561,7 +567,7 @@ def _run_single(
 
 def _run_batch(
     files: list[Path],
-    defaults: dict[str, ConfigValue],
+    defaults: ResolvedConfig,
     verbose: bool,
     force: bool,
     compute_type_explicit: bool = False,
diff --git a/src/local_transcriber/config.py b/src/local_transcriber/config.py
index e3dce72..0f36361 100644
--- a/src/local_transcriber/config.py
+++ b/src/local_transcriber/config.py
@@ -3,10 +3,43 @@
 import tomllib
 import warnings
 from pathlib import Path
+from typing import TypedDict, TypeVar, cast
 
 type ConfigValue = str | bool
+_T = TypeVar("_T")
 
-HARDCODED_DEFAULTS: dict[str, ConfigValue] = {
+
+class ConfigValues(TypedDict, total=False):
+    """Проверенные значения из TOML-конфига."""
+
+    model: str
+    language: str
+    device: str
+    compute_type: str
+    diarize: bool
+
+
+class CliValues(TypedDict, total=False):
+    """Явные значения CLI до разрешения каскада."""
+
+    model: str | None
+    language: str | None
+    device: str | None
+    compute_type: str | None
+    diarize: bool | None
+
+
+class ResolvedConfig(TypedDict):
+    """Полная конфигурация после разрешения каскада."""
+
+    model: str
+    language: str
+    device: str
+    compute_type: str
+    diarize: bool
+
+
+HARDCODED_DEFAULTS: ResolvedConfig = {
     "model": "medium",
     "language": "ru",
     "device": "auto",
@@ -49,7 +82,7 @@ def find_config_file() -> Path | None:
     return None
 
 
-def load_config(path: Path | None = None) -> dict[str, ConfigValue]:
+def load_config(path: Path | None = None) -> ConfigValues:
     """Загружает и валидирует TOML-конфиг.
 
     Неизвестные ключи вызывают предупреждение (а не ошибку) для forward
@@ -99,31 +132,53 @@ def load_config(path: Path | None = None) -> dict[str, ConfigValue]:
             raise ValueError(f"Значение 'language' в {path} не может быть пустым")
         result[key] = value
 
-    return result
+    return cast(ConfigValues, result)
 
 
-def resolve_defaults(
-    cli_values: dict[str, ConfigValue | None], config: dict[str, ConfigValue]
-) -> dict[str, ConfigValue]:
+def resolve_defaults(cli_values: CliValues, config: ConfigValues) -> ResolvedConfig:
     """Каскад приоритетов: CLI > конфиг-файл > hardcoded-дефолты."""
-    result: dict[str, ConfigValue] = {}
-    for key in HARDCODED_DEFAULTS:
-        cli_val = cli_values.get(key)
-        if cli_val is not None:
-            result[key] = cli_val
-        elif key in config:
-            result[key] = config[key]
-        else:
-            result[key] = HARDCODED_DEFAULTS[key]
-    return result
+    return {
+        "model": _resolve_value(
+            cli_values.get("model"), config.get("model"), HARDCODED_DEFAULTS["model"]
+        ),
+        "language": _resolve_value(
+            cli_values.get("language"),
+            config.get("language"),
+            HARDCODED_DEFAULTS["language"],
+        ),
+        "device": _resolve_value(
+            cli_values.get("device"),
+            config.get("device"),
+            HARDCODED_DEFAULTS["device"],
+        ),
+        "compute_type": _resolve_value(
+            cli_values.get("compute_type"),
+            config.get("compute_type"),
+            HARDCODED_DEFAULTS["compute_type"],
+        ),
+        "diarize": _resolve_value(
+            cli_values.get("diarize"),
+            config.get("diarize"),
+            HARDCODED_DEFAULTS["diarize"],
+        ),
+    }
+
+
+def _resolve_value(cli_value: _T | None, config_value: _T | None, default: _T) -> _T:
+    """Выбирает первое явно заданное значение каскада."""
+    if cli_value is not None:
+        return cli_value
+    if config_value is not None:
+        return config_value
+    return default
 
 
 def apply_device_defaults(
-    defaults: dict[str, ConfigValue],
+    defaults: ResolvedConfig,
     resolved_device: str,
-    cli_values: dict[str, ConfigValue | None],
-    config: dict[str, ConfigValue],
-) -> dict[str, ConfigValue]:
+    cli_values: CliValues,
+    config: ConfigValues,
+) -> ResolvedConfig:
     """Применяет device-aware дефолты для model и compute_type,
     если они не были явно заданы через CLI или конфиг."""
     device_defs = DEVICE_DEFAULTS.get(resolved_device, {})
@@ -135,4 +190,4 @@ def apply_device_defaults(
         if cli_values.get(key) is None and key not in config:
             if key in device_defs:
                 result[key] = device_defs[key]
-    return result
+    return cast(ResolvedConfig, result)
diff --git a/tests/test_config.py b/tests/test_config.py
index 69fe8a2..2408a01 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -1,4 +1,3 @@
-from pathlib import Path
 from unittest.mock import patch
 
 import pytest