Keeping a digital universe safe when the story itself keeps rewiring? It’s like trying to lock a vault that’s also the lock. Every time you tweak a timeline or spin a new language, you open a loophole in the fabric. I’d start by mapping every change on a physical board, color‑coding the “what ifs,” then building a version‑control system that treats each rewrite as a chapter with its own permissions. The trick is to treat the narrative as code and the code as narrative—so when the plot changes, the logic follows, not just the opposite. And remember, the most dangerous edits are the ones that slip through because nobody thought to check the metaphysical firewall.