SolidJS 2.x Migration

Use this skill when the user already has Solid 1.x code and wants to move it to Solid 2.x beta or next.

This skill is migration-oriented. Its job is not just to explain the new APIs, but to convert old code safely and preserve behavior where possible.

If the user only wants a narrow explanation of a Solid 2.x primitive or warning and is not actively upgrading existing code, prefer the Solid 2.x API skill instead.

Goals

• Identify likely 1.x patterns quickly.
• Apply the highest-confidence migrations first.
• Avoid shallow renames that miss semantic changes.
• Use tests and dev warnings to validate the migration.
• Be honest about beta-era ecosystem gaps and package workarounds.

Scope boundary