Additional Mutable Properties

[FactType("Blog.Site.Domain")]
public record SiteDomain(Site site, string value, SiteDomain[] prior) { }

Renderer.RenderTypes(typeof(SiteDomain), typeof(SiteName))

var siteDomain0 = await jinagaClient.Fact(new SiteDomain(site, "example.com", []));

jinagaClient.RenderFacts(siteDomain0, siteName2)

var sitesByUser = Given<User>.Match((user, facts) =>
    from site in facts.OfType<Site>()
    where site.creator == user
    where !facts.Any<SiteDeleted>(
        sd => sd.site == site &&
        !facts.Any<SiteRestored>(sr => sr.deleted == sd))
    select new
    {
        Site = site,
        Names =
            from name in facts.OfType<SiteName>()
            where name.site == site
            where !facts.Any<SiteName>(next => next.prior.Contains(name))
            select name.value,
        Domains =
            from domain in facts.OfType<SiteDomain>()
            where domain.site == site
            where !facts.Any<SiteDomain>(next => next.prior.Contains(domain))
            select domain.value
    });

var sites = await jinagaClient.Query(sitesByUser, user);

var sitesViewModel = sites.Select(s => new
{
    Name = s.Names.FirstOrDefault() ?? "New site",
    Domain = s.Domains.FirstOrDefault() ?? ""
});

sitesViewModel