You'll notice
Claude Code re-measures terminal cell pixel size whenever the terminal window is resized
What
When the terminal window is resized, including via the SIGWINCH signal (the standard Unix signal terminals send on resize), Claude Code now re-measures the pixel dimensions of a single terminal character cell, in addition to its existing resize handling and re-rendering.
Why
Knowing the current cell pixel size accurately matters for features like inline image display, which need to convert between character-cell and pixel measurements; re-measuring on resize keeps that conversion correct after the window changes size.