As I said in another comment, this is brilliant. Suggestion: Remove anything that isn't part of the satire; act always as if it's a 'real' encyclopedia. For example on the front page I would remove,
> Articles are generated on demand and stored permanently upon first request.
Don't dispell the magic; don't pull back the curtain and let people see the mechanics.
EDIT: As you say in your system prompt, "You never wink at the reader. You never acknowledge that anything is funny or fictional. Everything is reported as though it is completely normal and well-documented"
This is irresponsible for people who don't get it, takes away confirmation for people who do get it, and makes me block/blacklist any liar who does it.
It is indeed a problem for people who refuse to use their sense of humor.