The tmux terminfo extensions Ss and Se are currently specified as booleans in `st.info`. They should be strings. See https://github.com/tmux/tmux/blob/eeedb43ae847a0a692ceea965f7556e84bca4fd0/tty-term.c lines 254 and 265.
I have used the values from https://invisible-island.net/ncurses/terminfo.src.html#toc-_S_I_M_P_L_E_T_E_R_M for this patch. --- st.info | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/st.info b/st.info index 52fc617..78ffd30 100644 --- a/st.info +++ b/st.info @@ -189,10 +189,10 @@ st| simpleterm, rmxx=\E[29m, smxx=\E[9m, # tmux extensions, see TERMINFO EXTENSIONS in tmux(1) - Se, - Ss, Tc, Ms=\E]52;%p1%s;%p2%s\007, + Se=\E[2 q, + Ss=\E[%p1%d q, st-256color| simpleterm with 256 colors, use=st, -- 2.23.0
