Thirty minutes on Fable 5, a whole week's credits gone. You're welcome. Because what came out the other side is attached, and it's the thing most of you actually need. Here's the shift nobody's pricing in properly. The jump from a cheap model to a frontier "upgrade" model isn't a 20% better autocomplete. On the hard stuff it's a different category of machine. The longer and more complex the job, the bigger the gap, and it grows the deeper you go. Quick task? Barely notice. Whole-project, hold-it-all-at-once, multi-file reasoning? Not close. And if you vibe coded your base, this is aimed squarely at you. Think about how that base got built. A weaker model with a small context window, working through a keyhole, one file or one session at a time. It made a hundred locally sensible decisions that are globally broken, and by design it could never see the breakage. Duplicated logic in two files. A rename done in some places and not others. An endpoint that quietly forgot the auth its nine siblings got. Frontend validation with nothing behind it. None of that is your fault. It's the signature of the tool that built it. Now point an upgrade model at the whole thing at once. That's the unlock. It can hold the entire project in its head where the builder never could. It uses persistent memory like nothing before it, compounding as it works instead of relearning from zero. And it reasons at senior level, root cause, trade-offs, expected value, not pattern-match-and-stop. Here's the part I want to hammer, because it's the highest-leverage move available to you right now: two dead-simple skills have a 20x impact on a vibe-coded base. A /insights skill. Point it at your project and ask what's actually going on. Where's the risk, what contradicts what, what's going to break at scale, what did the weaker model miss. You go from "it works, I think" to a map of exactly where the bodies are buried. A /code-review skill. Not style nitpicks. Whole-system coherence, the semantic seams no linter can see, ranked by what will actually hurt in production, with the fix scoped tightly enough that it doesn't open three new holes while closing one.