OCP demo file is shown instead of target file until first save or `%r` magic

[phansel]

OS: Linux 7.0.5, x11
python: 3.13 (venv)
browser: Firefox 150.0.2

Installed filewatcher123d:

$ git clone https://github.com/jdegenstein/filewatcher123d.git
$ cd filewatcher123d
$ uv venv --python 3.13
$ source .venv/bin/activate
(venv) $ uv pip install .

Created a file basic.py with the following contents:

from build123d import *
from ocp_vscode import *

length, width, thickness = 80.0, 60.0, 10.0

with BuildPart() as ex1:
    Box(length, width, thickness)
    Box(length, width, thickness)

show_all()

The first time fw123d is launched with fw123d basic.py, nothing is rendered other than the OCP logo:

When the file is changed the first time (e.g. adding a space) and re-saved, or when %r magic is run in the terminal, it does finally render:

[jdegenstein]

Thanks for reporting and sorry for the slow response. This is kind of intentional behavior to watch for the first file change but I can see how it is a bit annoying. The other problem is that ocp_vscode can take a bit to fully start up, so I am a little worried about a race condition. Regardless, I think I agree it would be good to improve this.