How to: Extensible
If there is no prompt segment that does what you need, implement your own. Powerlevel10k provides
public API for defining segments that are as fast and as flexible as built-in ones.
Screen recording
![Powerlevel10k Custom Segment](
    https://raw.githubusercontent.com/romkatv/powerlevel10k-media/master/custom-segment.gif)
On Linux you can fetch current CPU temperature by reading `/sys/class/thermal/thermal_zone0/temp`.
The screencast shows how to define a prompt segment to display this value. Once the segment is
defined, you can use it like any other segment. All standard customization parameters will work for
it out of the box.

Type `p10k help segment` for reference.

*Note*: If you modify `POWERLEVEL9K_*` parameters in an already initialized interactive shell (as
opposed to editing `~/.p10k.zsh`), the changes might not be immediately effective. To apply the
modifications, invoke `p10k reload`. Setting `POWERLEVEL9K_DISABLE_HOT_RELOAD=false` eliminates the
necessity for `p10k reload` but results in a marginally slower prompt.

*Tip*: Prefix names of your own segments with `my_` to avoid clashes with future versions of
Powerlevel10k.