Boot automatically after rebuild

So as I get no answer for 2 months, I guess this is not possible. :(

And I know this can be done with the Linode api, but I was hoping to be able to self-rebuild a Linode. When I start the rebuild, I loose connection, so I can't launch an api request to boot the node. Having to boot my Linode manually every time is not very productive.

You can just queue a boot job for the new config profile after you initiate the rebuild. The boot job will run after the rebuild is done.