diff --git a/docs/public-content.md b/docs/public-content.md
index 8752bc3..9b37cae 100644
--- a/docs/public-content.md
+++ b/docs/public-content.md
@@ -12,8 +12,10 @@ Blog posts are authored and stored in Cameron's Leaflet publication as
 
 The repository contains no Blog Markdown copies, Blog projection manifest,
 importer, writer, or reconciliation job. The site reads the publication from
-Cameron's PDS at runtime, filters for the `blog` tag, and converts Leaflet blocks
-to HTML for Cameron.stream. Editing and publishing happen in Leaflet.
+Cameron's PDS at runtime, keeps documents whose `site` field matches the Blog
+publication URI (`PUBLICATION_URI`), and converts Leaflet blocks to HTML for
+Cameron.stream. Membership in that publication is the filter — not an optional
+`blog` tag. Editing and publishing happen in Leaflet.
 
 Stable document paths provide the public Cameron.stream routes. Leaflet
 analytics are independent of repository state: Leaflet aggregates pageviews by