mwg API
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    Type Alias BuiltinHookType

    BuiltinHookType:
        | "predicate"
        | "modifier"
        | "generator"
        | "command"
        | "ai"
        | "migration"

    The hook boundary described in the MWG architecture documentation. Hooks are the only place JavaScript appears in MWL content. They are referenced by type:name, resolved by the tooling, and bundled ahead of time; the runtime never evaluates JavaScript from content.