{{- $.Scratch.Add "index" slice -}}
{{- range .Site.Sites -}}
    {{- $pages := where .RegularPages "Params.hidden" "!=" true -}}
    {{- range $pages -}}
        {{- $.Scratch.Add "index" (dict "title" .Title "tags" .Params.tags "categories" .Params.categories "content" .Plain "permalink" .Permalink) -}}
    {{- end -}}
{{- end -}}
{{- $.Scratch.Get "index" | jsonify -}}