my_nvim_config/after/plugin/whichkey.lua

-- Document existing key chains
require('which-key').add {
    { "<leader>f", group = "[F]ind" },
    { "<leader>f_", hidden = true },
    { "<leader>h", group = "Git [H]unk" },
    { "<leader>h_", hidden = true },
    { "<leader>s", group = "[S]earch" },
    { "<leader>s_", hidden = true },
    { "<leader>t", group = "[T]oggle" },
    { "<leader>t_", hidden = true },
    { "<leader>w", group = "[W]orkspace" },
    { "<leader>w_", hidden = true },
}