Conditional subject lines using template language–is it possible?

Hi all,

Within a metric-based flow, I’d like to add a conditional subject line to an email.

However, I’m running into two problems...

First, I can’t write a subject line that exceeds 255 characters. Even though the subject would be resolved to way fewer characters, the character counter is including the template tags as characters.

Second, is this even possible? Can I use conditional template tags like {% if event.field %} in a subject line?

Here is my conditional.

{% if event.flag1 and event.flag2 %}✅ You're good!{% elif event.flag1 and not event.flag2 %}❌ You're maybe not so good!{% elif not event.flag1 and event.flag2 %}❌ You're definitely not good.{% elif not event.flag1 and not event.flag2 %}❌ You're not good at all. Definitely.{% endif %}

Thank you!

Kevin.