epilogue
I thought about this for a while. The ending I described in >>34 has the line "I have read my SICP today," which is (obviously) a reversal of the meme, and it will hit hardest if it's the very last line in the game.
So, an epilogue of sorts is fine with me, as long as it occurs in between the final confrontation with the snake and the moment when the player looks in the mirror. That more or less implies it will be an inner monologue. I just have no idea what the player character would actually be contemplating apart from the setup for the last line. It would depend on the rest of the story.