Vibe Coding
Simon Willison Shipped sqlite-utils 4.0 With Fable Doing the Release-Blocker Review — Five Blockers Found Pre-Stable
Willison's 4.0 stable release (July 7) added database migrations, nested transactions via `db.atomic()`, and compound foreign keys, with the rc2 work costing about $149.25 in Fable usage. The transferable technique is the one that isn't 'have the model write code': he ran Fable as a dedicated pre-release reviewer over the finished diff and it surfaced five release blockers, including a serious transaction bug. Upgrade guide and release notes were written by Fable 5, Opus 4.8, and GPT-5.5 in combination — heterogeneous model routing applied to documentation, not just to subtask dispatch.
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