React / foldkit-react-codegen

What it refuses

Each refusal prints file:line:column - error CODE: message. If any file has a diagnostic, the CLI writes nothing and exits with status 1.

Code	Cause
`FKREACT0001`	A builder with no standalone JSX form: `h.submodel` without a literal `{ model, view, toParentMessage }` config, or `h.keyed` with a computed tag
`FKREACT0002`	An attribute without a faithful React equivalent: `OnMount`, `OnUnmount`, `OnChange` (the native `change` event, which React's `onChange` is not), `InnerHTML`, and anything not in the table
`FKREACT0003`	Attributes the compiler cannot see: a non-literal attribute array, a spread, or an attribute built outside an element
`FKREACT0004`	The builder stored or used other than calling it or passing it to a helper view
`FKREACT0005`	An argument it cannot lower: click options, `Style` without an object literal, `Attribute` with a computed name
`FKREACT0006`	A lazy slot or factory used other than `const slot = createLazy()` and a direct `slot(...)` call
`FKREACT0007`	A custom element whose spec is not a literal `CustomElement.define({ tag, properties, events })` in the same module, a factory it does not declare, or a spec or bound builder used other than `spec.withMessage(h)` and calling it

For any of these, keep that part in Foldkit and use foldkit-react, or write it in React.