sorter_example.lua

local sorter = require("telescope").extensions.fzf.native_fzf_sorter()

-- Save original scoring function to get the score
local fzf_scoring_function = sorter.scoring_function

-- Override function to do whatever you want.
-- Telescope is just functions
sorter.scoring_function = function(self, prompt, line)
  local score = fzf_scoring_function(self, prompt, line)

  -- line is the file entry, you could get the full line filename, etc.
  if vim.startswith(line, "/home/tjdevries/example") then
    score = score * 2
  end
  return score
end

require("telescope.builtin").find_files {
  sorter = sorter,
  -- ... other options here
}