Function render_docs 

pub fn render_docs(
    prepared: Vec<PreparedDoc>,
    partials: &Partials,
    config: &SiteConfig,
    registry: &Registry,
    asset_urls: Option<&dyn AssetUrlResolver>,
    plantuml: Option<&PlantumlSupport<'_>>,
    bases: Option<&Corpus>,
) -> SiteBuild

Pass 2: build the slug set, run the wikilink pass + syntect highlight per doc, assemble the link graph + search index. Input order preserved.