diff --git a/third_party/2and3/chardet/__init__.pyi b/third_party/2and3/chardet/__init__.pyi
index 3caad8946..54e48f5c7 100644
--- a/third_party/2and3/chardet/__init__.pyi
+++ b/third_party/2and3/chardet/__init__.pyi
@@ -1,4 +1,26 @@
-from typing import Any
+import sys
+from typing import Any, Tuple
+
 from .universaldetector import UniversalDetector as UniversalDetector
 
 def __getattr__(name: str) -> Any: ...  # incomplete
+
+if sys.version_info >= (3, 8):
+    from typing import TypedDict
+else:
+    from typing_extensions import TypedDict
+
+class _LangModelType(TypedDict):
+    char_to_order_map: Tuple[int, ...]
+    precedence_matrix: Tuple[int, ...]
+    typical_positive_ratio: float
+    keep_english_letter: bool
+    charset_name: str
+    language: str
+
+class _SMModelType(TypedDict):
+    class_table: Tuple[int, ...]
+    class_factor: int
+    state_table: Tuple[int, ...]
+    char_len_table: Tuple[int, ...]
+    name: str
diff --git a/third_party/2and3/chardet/enums.pyi b/third_party/2and3/chardet/enums.pyi
new file mode 100644
index 000000000..f5bdc04c1
--- /dev/null
+++ b/third_party/2and3/chardet/enums.pyi
@@ -0,0 +1,40 @@
+class InputState(object):
+    PURE_ASCII: int
+    ESC_ASCII: int
+    HIGH_BYTE: int
+
+class LanguageFilter(object):
+    CHINESE_SIMPLIFIED: int
+    CHINESE_TRADITIONAL: int
+    JAPANESE: int
+    KOREAN: int
+    NON_CJK: int
+    ALL: int
+    CHINESE: int
+    CJK: int
+
+class ProbingState(object):
+    DETECTING: int
+    FOUND_IT: int
+    NOT_ME: int
+
+class MachineState(object):
+    START: int
+    ERROR: int
+    ITS_ME: int
+
+class SequenceLikelihood(object):
+    NEGATIVE: int
+    UNLIKELY: int
+    LIKELY: int
+    POSITIVE: int
+
+    @classmethod
+    def get_num_categories(cls) -> int: ...
+
+class CharacterCategory(object):
+    UNDEFINED: int
+    LINE_BREAK: int
+    SYMBOL: int
+    DIGIT: int
+    CONTROL: int
diff --git a/third_party/2and3/chardet/langbulgarianmodel.pyi b/third_party/2and3/chardet/langbulgarianmodel.pyi
new file mode 100644
index 000000000..9a8abde3a
--- /dev/null
+++ b/third_party/2and3/chardet/langbulgarianmodel.pyi
@@ -0,0 +1,8 @@
+from typing import Tuple
+from . import _LangModelType
+
+Latin5_BulgarianCharToOrderMap: Tuple[int, ...]
+win1251BulgarianCharToOrderMap: Tuple[int, ...]
+BulgarianLangModel: Tuple[int, ...]
+Latin5BulgarianModel: _LangModelType
+Win1251BulgarianModel: _LangModelType
diff --git a/third_party/2and3/chardet/langcyrillicmodel.pyi b/third_party/2and3/chardet/langcyrillicmodel.pyi
new file mode 100644
index 000000000..fdeb837cc
--- /dev/null
+++ b/third_party/2and3/chardet/langcyrillicmodel.pyi
@@ -0,0 +1,16 @@
+from typing import Tuple
+from . import _LangModelType
+
+KOI8R_char_to_order_map: Tuple[int, ...]
+win1251_char_to_order_map: Tuple[int, ...]
+latin5_char_to_order_map: Tuple[int, ...]
+macCyrillic_char_to_order_map: Tuple[int, ...]
+IBM855_char_to_order_map: Tuple[int, ...]
+IBM866_char_to_order_map: Tuple[int, ...]
+RussianLangModel: Tuple[int, ...]
+Koi8rModel: _LangModelType
+Win1251CyrillicModel: _LangModelType
+Latin5CyrillicModel: _LangModelType
+MacCyrillicModel: _LangModelType
+Ibm866Model: _LangModelType
+Ibm855Model: _LangModelType
diff --git a/third_party/2and3/chardet/langgreekmodel.pyi b/third_party/2and3/chardet/langgreekmodel.pyi
new file mode 100644
index 000000000..eca4b5dfe
--- /dev/null
+++ b/third_party/2and3/chardet/langgreekmodel.pyi
@@ -0,0 +1,8 @@
+from typing import Tuple
+from . import _LangModelType
+
+Latin7_char_to_order_map: Tuple[int, ...]
+win1253_char_to_order_map: Tuple[int, ...]
+GreekLangModel: Tuple[int, ...]
+Latin7GreekModel: _LangModelType
+Win1253GreekModel: _LangModelType
diff --git a/third_party/2and3/chardet/langhebrewmodel.pyi b/third_party/2and3/chardet/langhebrewmodel.pyi
new file mode 100644
index 000000000..acd71e745
--- /dev/null
+++ b/third_party/2and3/chardet/langhebrewmodel.pyi
@@ -0,0 +1,6 @@
+from typing import Tuple
+from . import _LangModelType
+
+WIN1255_CHAR_TO_ORDER_MAP: Tuple[int, ...]
+HEBREW_LANG_MODEL: Tuple[int, ...]
+Win1255HebrewModel: _LangModelType
diff --git a/third_party/2and3/chardet/langhungarianmodel.pyi b/third_party/2and3/chardet/langhungarianmodel.pyi
new file mode 100644
index 000000000..e1e4ca50c
--- /dev/null
+++ b/third_party/2and3/chardet/langhungarianmodel.pyi
@@ -0,0 +1,8 @@
+from typing import Tuple
+from . import _LangModelType
+
+Latin2_HungarianCharToOrderMap: Tuple[int, ...]
+win1250HungarianCharToOrderMap: Tuple[int, ...]
+HungarianLangModel: Tuple[int, ...]
+Latin2HungarianModel: _LangModelType
+Win1250HungarianModel: _LangModelType
diff --git a/third_party/2and3/chardet/langthaimodel.pyi b/third_party/2and3/chardet/langthaimodel.pyi
new file mode 100644
index 000000000..edeb07b2f
--- /dev/null
+++ b/third_party/2and3/chardet/langthaimodel.pyi
@@ -0,0 +1,6 @@
+from typing import Tuple
+from . import _LangModelType
+
+TIS620CharToOrderMap: Tuple[int, ...]
+ThaiLangModel: Tuple[int, ...]
+TIS620ThaiModel: _LangModelType
diff --git a/third_party/2and3/chardet/langturkishmodel.pyi b/third_party/2and3/chardet/langturkishmodel.pyi
new file mode 100644
index 000000000..a723c1e4a
--- /dev/null
+++ b/third_party/2and3/chardet/langturkishmodel.pyi
@@ -0,0 +1,6 @@
+from typing import Tuple
+from . import _LangModelType
+
+Latin5_TurkishCharToOrderMap: Tuple[int, ...]
+TurkishLangModel: Tuple[int, ...]
+Latin5TurkishModel: _LangModelType
diff --git a/third_party/2and3/chardet/universaldetector.pyi b/third_party/2and3/chardet/universaldetector.pyi
index a81a7f1bb..7a97569e9 100644
--- a/third_party/2and3/chardet/universaldetector.pyi
+++ b/third_party/2and3/chardet/universaldetector.pyi
@@ -1,5 +1,5 @@
 import sys
-from typing import Dict, Union, AnyStr, Pattern, Optional
+from typing import Dict, Pattern, Optional
 from typing_extensions import TypedDict
 from logging import Logger
 
diff --git a/third_party/2and3/chardet/version.pyi b/third_party/2and3/chardet/version.pyi
new file mode 100644
index 000000000..13b2534d1
--- /dev/null
+++ b/third_party/2and3/chardet/version.pyi
@@ -0,0 +1,4 @@
+from typing import List
+
+__version__: str
+VERSION: List[str]