There is a way for setup build notification for yml bamboo specs.
Something like notification for all builds completed? I need some simple notification for recipient type as committers.
The idea behind Bamboo Specs YAML is to make it as simple as possible, therefore some tradeoffs have been made to make it possible and some of the settings like notifications are hard coded and you can't change them.
notifications are sent to commiters and watchers of the plan when plan fails
You can read more about it in the documentation.
However, if you believe it limits your use case, feel free to raise an improvement request stating what exactly is missing in Bamboo Specs YAML.