Actually, I don't think all components (including kernel build, copy uInitrd.igz to vfat file system) should be implemented automatically at this stage,
because end users don't need to follow this build routines once all features based on final user scenario are completed.
Pre-built kernel image only for bios and uIinitrd.igz will be built in spi flash.
It's possible it can be updated later, but very rarely.
I think the uInitrd packaging sequence should be ready as auto config to maintain the sequence and and share/discuss this idea with you.
But not all operations, I think.

Did I understand what you're asking?...
And about wiki page, sorry for many typo errors.

Still I'm keeping modifying scenario and fixing/improving the whole sequence.... many updates.
I will update the wiki page middle of next week and examine it very carefully.