Summary & Key Takeaways ​

• Attribution engine's folds, queries, and formatters are now named exports from solid-js/attribution.
• This allows consumers to tree-shake unused diagnostic parts, reducing bundle size by ~1,150 B brotli.
• Rerun records are now serializable, and RerunEvent no longer carries the live node, using nodeId instead.
• AttributionCostTables and AttributionFeedbackTables are new types for diagnostic data.
• The attribution object retains core functions like enable, disable, and subscribe.

Our Commentary ​

I'm always happy to see improvements in developer diagnostics and bundle size. The tree-shaking for the attribution engine is a smart move; it means we get powerful debugging tools without paying for them in production if we don't need them. And serializable rerun records? That's a win for anyone trying to analyze performance data outside the browser.