`--mode` gives an `InvalidArgument` error

[adiabatic]

I’m using glyph 1.0.11 installed via brew install glyph on macOS Sequoia 15.7.1.

I’m trying to get something a little more like the animated GIF in the README, but the obvious path to get there — --mode pixels — isn’t working.

> glyph --mode pixels  --input Bouba\ and\ Kiki.jpg
Invalid argument '--mode'
error: InvalidArgument

> glyph --input Bouba\ and\ Kiki.jpg --mode pixels
Invalid argument '--mode'
error: InvalidArgument

> glyph --mode ascii  --input Bouba\ and\ Kiki.jpg
Invalid argument '--mode'
error: InvalidArgument

Am I doing something wrong?