Summary & Key Takeaways ​

• A new attribution system tracks the origin of every root change record.
• Interaction, effect, action, async, and external frames now carry origin data.
• DEV.attribution.withInteraction allows custom renderers to declare interactions.
• Core dev hooks effectRunStart/End and actionStepStart/End are introduced.
• A security fix binds GET() grants to the declared function identity.

Our Commentary ​

SolidJS continues to impress with its deep commitment to developer experience, even in release candidates. The new attribution system feels like a game-changer for debugging complex reactivity flows. I'm always a fan of tools that help us understand why things are happening, not just what. This level of introspection is rare and genuinely exciting.