SyntaxError in message_manager.py and PydanticUserError for TypedDict on Windows

[MarcusNeufeldt]

When attempting to run the Index agent (either via the Python API or the index run CLI) on Windows, multiple errors occur within the lmnr-index library, preventing it from running.

Environment:

Windows 11
Python version: 3.11.4
Pydantic version: 2.10.6

Steps to Reproduce:

Install lmnr-index: pip install lmnr-index
Install Playwright dependencies: playwright install chromium
Create a .env file with a valid OPENAI_API_KEY.
Attempt to run the agent (e.g., index run).

Expected Behavior:

The Index agent should initialize and run without crashing.

Actual Behavior:

Two distinct errors occur sequentially:
Error 1: SyntaxError in message_manager.py
The first error encountered is:

Traceback (most recent call last):
  # ... traceback ...
  File "C:\\Users\\marcu\\miniconda3\\Lib\\site-packages\\index\\agent\\message_manager.py", line 101
    highlighted_elements += f"{start_tag}{element.text.replace(\'\\n\', \' \')}</{element.tag_name}>\\n"
                  ^
SyntaxError: f-string expression part cannot include a backslash

Cause: Line 101 in index/agent/message_manager.py uses element.text.replace('\n', ' ') directly within an f-string expression, which is not allowed due to the backslash.
Workaround: Manually changing line 101 to perform the .replace() before the f-string resolves this specific error:

# Fix: Perform replace before the f-string
element_text_no_newlines = element.text.replace('\n', ' ')
highlighted_elements += f"{start_tag}{element_text_no_newlines}</{element.tag_name}>\n"

Error 2: PydanticUserError regarding TypedDict
After applying the workaround for Error 1, a second error occurs during Pydantic model processing:

Traceback (most recent call last):
  # ... traceback involving pydantic model construction ...
  File "C:\\Users\\marcu\\miniconda3\\Lib\\site-packages\\index\\agent\\models.py", line 38, in <module> # Or similar Pydantic model definition
    class AgentOutput(BaseModel):
  # ... more pydantic traceback ...
  File "C:\\Users\\marcu\\miniconda3\\Lib\\site-packages\\pydantic\\_internal\\_generate_schema.py", line 1406, in _typed_dict_schema
    raise PydanticUserError(
pydantic.errors.PydanticUserError: Please use `typing_extensions.TypedDict` instead of `typing.TypedDict` on Python < 3.12.

For further information visit https://errors.pydantic.dev/2.10/u/typed-dict-version

Cause: The library (likely in index/agent/models.py or other model files) appears to be using typing.TypedDict which causes compatibility issues with Pydantic on Python versions older than 3.12. Pydantic expects typing_extensions.TypedDict in these cases.
Suggested Fix: Imports of TypedDict from typing should be changed to use typing_extensions.TypedDict instead. The typing-extensions package may need to be added as a dependency if it isn't already.

[skull8888888]

@MarcusNeufeldt thanks for the issue! I will incorporate the line fix change and will check the TypedDict issue. Keep an eye on a new release. It also would be really helpful if you could install from the working branch to help me test it out, because I don't have the windows machine available.

[skull8888888]

@MarcusNeufeldt should be fixed with index 0.1.7