Definitely! For example,

  cat somecode.py | ell -f -

If you prefer adding another piece of prompt instantly instead of adding it in the template:

  (cat somecode.py; echo "Explain this code") | ell -f -

I should've added this into README.

I really love your "llm" and the blog posts but somehow I missed them before. I believe I would be a lot less motivated to write ell if I had read your post first.