Ohodnoceno 5 z 5 hvězdiček

Well made, useful, nearly perfect. It needs a bit more actions like this: when I press "reply", I want to prompt what to respond. At this time, it tries to infer the answer from the content of the mail. I tried others ways to do but nothing work as expected. But, the rephrase method, summary, and so on, they works well.

EDIT after the author answer:
OK, I've seen this but didn't realize it was possible to ask for additional text. Thanks a lot!

Tato recenze je pro předchozí verzi doplňku (3.5.4). 

You can already do this using custom data placeholders.
You should create a custom prompt using also the {%additional_text%} placeholder to ask a custom text when using the prompt (remember to check the "Ask for additional text" when creating the custom prompt).
You can find more info here: https://micz.it/thunderbird-addon-thunderai/data-placeholders/ and here: https://micz.it/thunderbird-addon-thunderai/custom-prompts/

If needed, please open an issue so we can interact more effectively: https://github.com/micz/ThunderAI/issues