Add repository-driven site theme

README.md

@@ -7,8 +7,10 @@ publishing path before more content or integrations are added.
 ## Source of truth
 
 This repository is authoritative for the site content it contains. Labyricorn
-reads `.labyricorn/site.yml`, discovers the configured content, builds the
-website, and publishes the completed output to the local canonical site.
+reads the repository participation policy in `.labyricorn/site.yml`, resolves
+the canonical site definition in `site.yml`, validates the `.theme/` package,
+discovers the configured content, builds the website, and publishes the
+completed output to the local canonical site.
 
 Generated website files do not belong in this repository.
 
@@ -16,6 +18,10 @@ Generated website files do not belong in this repository.
 
 ```text
 .labyricorn/site.yml  Repository participation and publishing policy
+site.yml              Canonical site definition and theme selection
+navigation.yml        Public navigation and section-template selection
+projects.yml          Allowlisted project-page declarations
+.theme/                Strict Liquid templates and declared static assets
 pages/                Standalone website pages
 articles/             Article source documents
 projects/             Project source documents
@@ -30,6 +36,7 @@ The first deployment includes:
 - one homepage;
 - one introductory article;
 - one project page;
+- a repository-owned, script-free Liquid theme;
 - local publication through Labyricorn.
 
 It does not yet include: