Answers --version (and -v/-V/--help), which the OpenWrt package CI requires: it installs the package and runs each executable looking for the version string. Previously the deck went straight to looking for a mouse, found none on a build server, and exited without ever printing a version.
Captures are now compressed with zlib. A snapshot was 461,223 bytes; across all seven screens the total falls from 3,228,561 to 52,946 bytes, an average of 61x smaller, decoding back to identical pixels. This matters because the spool is /tmp, which is the router's RAM.
Requires zlib (DEPENDS:=+zlib in the OpenWrt Makefile).