[Feature request] Make insert feedback corner radius and stroke width configurable

[khomenkovolodymyr]

The insert/drag feedback overlay is drawn with a hardcoded corner radius. From src/view.c:

#define INSERT_FEEDBACK_WIDTH 2
#define INSERT_FEEDBACK_RADIUS 9

Currently only the color is exposed, via insert_feedback_color.

Window corner radii on macOS are no longer a fixed target:

• macOS 26 Tahoe uses a radius that varies with toolbar height, producing several different values across apps
• macOS 27 Golden Gate standardizes windows at 20pt
• Users can override the system radius entirely with defaults write -g NSConvolutionOverride1 -float <n>

In all three cases the fixed 9pt feedback radius no longer matches the windows it is previewing, which looks rather inconsistent. This is most noticeable for anyone who has set a square or near-square radius, where a rounded overlay sits on top of hard-cornered windows.

So I thought adding config options mirroring the existing insert_feedback_color would be great:

yabai -m config insert_feedback_radius 6
yabai -m config insert_feedback_width  2

Keeping 9 and 2 as the defaults would preserve current behavior for everyone else.

While you could patch src/view.c and build from source, it means giving up the Homebrew install path for a two-token change.

Thanks a lot for maintaining this!
Yabai is great and I couldn't imagine myself using macos without it.

[asmvik]

Can probably just read the corner radius using system APIs to match the window. No need to require a new config option for that.
I guess the width can be made configurable.