Set vim.env.TERM to 'dumb' to remove ANSI formatting

[lazy-seal]

Problem

When using :!ls command, the output given by the shell may include ANSI formatting characters that does not get processed.

:!ls

    Directory: C:\Users\한울\AppData\Local\nvim

^[[32;1mMode   ^[[0m^[[32;1m              LastWriteTime^[[0m ^[[32;1;3m        Length^[[0m^[[32;1m Name^[[0m
^[[32;1m----   ^[[0m ^[[32;1m             -------------^[[0m ^[[32;1m        ------^[[0m ^[[32;1m----^[[0m
d----        2025-12-17 오후 10:50                ^[[44;1m.github^[[0m
d----        2025-12-17 오후 10:50                ^[[44;1mdoc^[[0m

Solution

Set vim.env.TERM to dumb to let shell ignore formatting when directing its stdout to neovim by adding the lines below:

-- Removes ANSI formatting characters (like `\033[31m`) printed by shell escape commands (like `:!ls`)
vim.env.TERM = 'dumb'