if the project is abandoned you can still "make" from source

[nutpantz]

works today on debian 13

you can still "make" the source then copy /src/tildesrc/tilde/src/.objects/edit to your path (rename it)and use it anywhere
(took a newbie like me a while to figure that out)

download and install the library
https://github.com/gphalkes/tilde/blob/master/README.md
FROM THE LINK IN THE instructions
apt install ./llnextgen_0.5.5-1_amd64.deb

apt install flex gettext libacl1-dev libattr1-dev libgpm-dev libncurses-dev libpcre2-dev libtool-bin libunistring-dev libxcb1-dev pkg-config clang
git clone as per THE INSTRUCTIONS
https://github.com/gphalkes/tilde/blob/master/README.md
( i made a batch file and ran it)
#!/bin/bash
for i in makesys transcript t3shared t3window t3widget t3key t3config t3highlight tilde ; do
git clone https://github.com/gphalkes/$i.git
done

and make

(but you cannot move the source files or it breaks)

as a total noobie, i suggest someone make better instructions as i cannot answer even the simplest question.
or just fork and take over the project