How can I ask for text input using the :sh read command?

[David-Else]

I would like to have a shortcut that sends the current buffer as context and asks for a prompt for AIChat. In the shell this works:

printf "Prompt: " && read -r prompt && aichat --file ./file.txt "$prompt"

In Helix this works, but I want to replace %{selection} with a user input, you currently need to write a prompt in the buffer specially and select it:

":sh aichat --file %{buffer_name} %{selection}"

I can't seem to get read working in Helix, ":sh read -r pr" fails with error code 1, can anybody help!?

PS AIChat can accept text as a command aichat hello or though STDIN cat data.txt | aichat