V3 deterministic HTML-to-PDF capability pack. By-value connector composition (service_kind=cli, no separate ingredient): the local WeasyPrint CLI renders one source HTML document to a PDF via the html.to_pdf catalog operation. Fixed-function and reproducible: the executor materializes the source HTML and owns the throwaway output directory, while WeasyPrint writes a fixed document.pdf result captured as result.file_ref. Write-tier but approval=never: WeasyPrint writes only to an engine-managed output dir and exposes no arbitrary flags. Use self-contained/local HTML inputs; the pack does not expose URL input or asset-fetch controls. Requires weasyprint on PATH (Debian/Ubuntu: apt install weasyprint).