First of all I do not expect that this commit is merged. This is more of a conversation starter before I spend more effort on this.
Having the meta info in the context would provide a nice way to provide parameters to plugins run in the pre parse phase. Is there any reason not to put the meta info to the context before running the pre parse transformers? Or are there any hidden dangers in this?
My own use case is a little templating hack where I would like to specify the template filename in the meta information and use the body of the page for the arguments.
add meta to context for pre parse transformers