diff --git a/deploy/labyricorn-control-plane.service b/deploy/labyricorn-control-plane.service
index 0a7448d..ebea746 100644
--- a/deploy/labyricorn-control-plane.service
+++ b/deploy/labyricorn-control-plane.service
@@ -12,6 +12,9 @@ Environment=NODE_ENV=production
 Environment=HOST=127.0.0.1
 Environment=PORT=3001
 Environment=LABYRICORN_BUILD_ROOT=/var/lib/website-engine/builds
+Environment=LABYRICORN_SITE_DEFINITION_REPOSITORY=/var/lib/website-engine/repositories/labyricorn-site-git-repo
+Environment=LABYRICORN_SITE_DEFINITION_REF=refs/heads/main
+Environment=LABYRICORN_SITE_DEFINITION_PATH=.
 ExecStart=/usr/bin/node /opt/website-engine-control-plane/dist/server.cjs
 Restart=on-failure
 RestartSec=5s
diff --git a/deploy/nginx-website-engine.conf b/deploy/nginx-website-engine.conf
index 755ed1c..eca7103 100644
--- a/deploy/nginx-website-engine.conf
+++ b/deploy/nginx-website-engine.conf
@@ -27,3 +27,17 @@ server {
     error_page 404 /404.html;
     }
 }
+
+server {
+    listen 8080 default_server;
+    listen [::]:8080 default_server;
+    server_name _;
+
+    root /var/lib/website-engine/builds/staging;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ =404;
+        error_page 404 /404.html;
+    }
+}
diff --git a/packages/site-definition/.labyricorn/site.yml b/packages/site-definition/.labyricorn/site.yml
new file mode 100644
index 0000000..238ba1f
--- /dev/null
+++ b/packages/site-definition/.labyricorn/site.yml
@@ -0,0 +1,8 @@
+version: 1
+enabled: true
+artifacts:
+  content_paths:
+    - pages
+    - articles
+    - projects
+  media_paths: []
diff --git a/packages/site-definition/.theme/templates/content/article.liquid b/packages/site-definition/.theme/templates/content/article.liquid
index fc33088..4260ad3 100644
--- a/packages/site-definition/.theme/templates/content/article.liquid
+++ b/packages/site-definition/.theme/templates/content/article.liquid
@@ -1,9 +1,9 @@
 <article class="content-grid">
-  <aside><h2>Contents</h2><ol>{% for heading in item.tableOfContents %}<li><a href="#{{ heading.id | escape }}">{{ heading.text | escape }}</a></li>{% endfor %}</ol></aside>
+  <aside><h2>Contents</h2><ol>{% for heading in page.tableOfContents %}<li><a href="#{{ heading.id }}">{{ heading.text }}</a></li>{% endfor %}</ol></aside>
   <div>
-    <p class="eyebrow">{{ item.artifactType | escape }}</p>
-    <h1>{{ item.title | escape }}</h1>
-    <p class="lede">{{ item.summary | escape }}</p>
-    <div class="prose">{{ item.content | safe_content }}</div>
+    <p class="eyebrow">{{ page.contentModel }}</p>
+    <h1>{{ page.title }}</h1>
+    <p class="lede">{{ page.summary }}</p>
+    <div class="prose">{{ page.renderedContent | safe_content }}</div>
   </div>
 </article>
diff --git a/packages/site-definition/.theme/templates/content/project.liquid b/packages/site-definition/.theme/templates/content/project.liquid
index 18947d2..fbced11 100644
--- a/packages/site-definition/.theme/templates/content/project.liquid
+++ b/packages/site-definition/.theme/templates/content/project.liquid
@@ -2,27 +2,22 @@
   <aside class="project-meta">
     <p class="eyebrow">Project</p>
     <dl>
-      <dt>Version</dt><dd>{{ project.version | escape }}</dd>
-      <dt>License</dt><dd>{{ project.license | escape }}</dd>
-      <dt>Source commit</dt><dd><code>{{ project.sourceSnapshot.commit | escape }}</code></dd>
-      <dt>Updated</dt><dd>{{ project.sourceSnapshot.committedAt | escape }}</dd>
+      <dt>Version</dt><dd>{{ page.metadata.version }}</dd>
+      <dt>License</dt><dd>{{ page.metadata.license }}</dd>
+      <dt>Source commit</dt><dd><code>{{ page.provenance.commit }}</code></dd>
+      <dt>Updated</dt><dd>{{ page.updated }}</dd>
     </dl>
     <h2>Stack</h2>
-    <ul>{% for item in project.stack %}<li>{{ item | escape }}</li>{% endfor %}</ul>
+    <ul>{% for item in page.metadata.stack %}<li>{{ item }}</li>{% endfor %}</ul>
   </aside>
   <div class="project-body">
-    <h1>{{ project.title | escape }}</h1>
-    <p class="lede">{{ project.summary | escape }}</p>
-    <p><a href="{{ project.homepage | escape }}">Open the standalone demo</a></p>
-    <h2 id="provenance">Pinned provenance</h2>
-    <p>The project and its publication were read from <code>{{ project.sourceSnapshot.repository | escape }}</code> at one exact commit.</p>
+    <h1>{{ page.title }}</h1>
+    <p class="lede">{{ page.summary }}</p>
+    <div class="prose">{{ page.renderedContent | safe_content }}</div>
+    <p><a href="{{ page.metadata.homepage }}">Open the standalone demo</a></p>
     <h2 id="tags">Tags</h2>
-    <ul class="tags">{% for tag in project.tags %}<li>{{ tag | escape }}</li>{% endfor %}</ul>
-    <h2 id="devlogs">Devlogs</h2>
-    {% if project.relatedContent.devlogs.size == 0 %}<p>No matching devlogs in this snapshot.</p>{% endif %}
-    {% for item in project.relatedContent.devlogs %}<article><h3><a href="{{ item.route | escape }}">{{ item.title | escape }}</a></h3></article>{% endfor %}
+    <ul class="tags">{% for tag in page.tags %}<li>{{ tag }}</li>{% endfor %}</ul>
     <h2 id="articles">Related articles</h2>
-    {% if project.relatedContent.articles.size == 0 %}<p>No matching articles in this snapshot.</p>{% endif %}
-    {% for item in project.relatedContent.articles %}<article><h3><a href="{{ item.route | escape }}">{{ item.title | escape }}</a></h3></article>{% endfor %}
+    {% for item in page.relationships.articles %}<article><h3><a href="{{ item.route }}">{{ item.title }}</a></h3></article>{% endfor %}
   </div>
 </article>
diff --git a/packages/site-definition/.theme/templates/home.liquid b/packages/site-definition/.theme/templates/home.liquid
index 261b62c..05f8b79 100644
--- a/packages/site-definition/.theme/templates/home.liquid
+++ b/packages/site-definition/.theme/templates/home.liquid
@@ -1,12 +1,13 @@
 <section class="hero">
   <p class="eyebrow">Engineering · Architecture · Operations</p>
-  <h1>{{ site.title | escape }}</h1>
-  <p>Repository-owned presentation rendered from an exact Git commit.</p>
+  <h1>{{ page.title }}</h1>
+  <p>{{ page.summary }}</p>
+  <div class="prose">{{ page.renderedContent | safe_content }}</div>
 </section>
 <section class="feed" aria-labelledby="latest">
   <h2 id="latest">Latest publications</h2>
-  {% if content.size == 0 %}<p>No published content in this snapshot.</p>{% endif %}
-  {% for item in content %}
-  <article><p class="eyebrow">{{ item.artifactType | escape }}</p><h3><a href="{{ item.route | escape }}">{{ item.title | escape }}</a></h3><p>{{ item.summary | escape }}</p></article>
+  {% if collection.items.size == 0 %}<p>No published content in this snapshot.</p>{% endif %}
+  {% for item in collection.items %}
+  <article><p class="eyebrow">{{ item.contentModel }}</p><h3><a href="{{ item.route }}">{{ item.title }}</a></h3><p>{{ item.summary }}</p></article>
   {% endfor %}
 </section>
diff --git a/packages/site-definition/.theme/templates/layout.liquid b/packages/site-definition/.theme/templates/layout.liquid
index bab2ed1..3262421 100644
--- a/packages/site-definition/.theme/templates/layout.liquid
+++ b/packages/site-definition/.theme/templates/layout.liquid
@@ -1,24 +1,24 @@
 <!doctype html>
-<html lang="{{ site.language | escape }}">
+<html lang="{{ site.language }}">
 <head>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <meta name="generator" content="labyricorn-theme/v1">
-<title>{{ page.title | escape }} · {{ site.title | escape }}</title>
-{% for stylesheet in theme.stylesheets %}<link rel="stylesheet" href="{{ stylesheet | escape }}">
-{% endfor %}{% for script in theme.scripts %}<script src="{{ script | escape }}" defer></script>
+<title>{{ page.title }} · {{ site.title }}</title>
+{% for stylesheet in theme.styles %}<link rel="stylesheet" href="{{ stylesheet }}">
+{% endfor %}{% for script in theme.scripts %}<script src="{{ script }}" defer></script>
 {% endfor %}</head>
 <body>
 <header class="site-header">
-  <a class="brand" href="/"><img src="/assets/images/logo.svg" width="32" height="32" alt=""><span>{{ site.title | escape }}</span></a>
+  <a class="brand" href="/"><img src="/assets/images/logo.svg" width="32" height="32" alt=""><span>{{ site.title }}</span></a>
   <nav aria-label="Primary">
-  {% for entry in navigation %}<a href="{{ entry.route | escape }}">{{ entry.label | escape }}</a>{% endfor %}
+  {% for entry in navigation %}<a href="{{ entry.route }}">{{ entry.label }}</a>{% endfor %}
   </nav>
 </header>
 <main>{{ page.body | safe_page_body }}</main>
 <footer class="site-footer">
   <span>Built from immutable Git snapshots.</span>
-  <code>{{ build.id | escape }}</code>
+  <code>{{ build.id }}</code>
 </footer>
 </body>
 </html>
diff --git a/packages/site-definition/.theme/templates/sections/listing.liquid b/packages/site-definition/.theme/templates/sections/listing.liquid
index 7237824..d78695b 100644
--- a/packages/site-definition/.theme/templates/sections/listing.liquid
+++ b/packages/site-definition/.theme/templates/sections/listing.liquid
@@ -1,10 +1,10 @@
 <header class="section-heading">
   <p class="eyebrow">Section</p>
-  <h1>{{ section.label | escape }}</h1>
+  <h1>{{ page.title }}</h1>
 </header>
 <section class="feed">
-  {% if content.size == 0 %}<p>No published items in this snapshot.</p>{% endif %}
-  {% for item in content %}
-  <article><h2><a href="{{ item.route | escape }}">{{ item.title | escape }}</a></h2><p>{{ item.summary | escape }}</p></article>
+  {% if collection.items.size == 0 %}<p>No published items in this snapshot.</p>{% endif %}
+  {% for item in collection.items %}
+  <article><h2><a href="{{ item.route }}">{{ item.title }}</a></h2><p>{{ item.summary }}</p></article>
   {% endfor %}
 </section>
diff --git a/packages/site-definition/articles/welcome.md b/packages/site-definition/articles/welcome.md
new file mode 100644
index 0000000..97f6a13
--- /dev/null
+++ b/packages/site-definition/articles/welcome.md
@@ -0,0 +1,22 @@
+---
+model: article
+title: Repository Rendering Is Live
+slug: repository-rendering
+route: /articles/repository-rendering/
+date: 2026-07-23
+status: published
+summary: The reference article proves Markdown discovery and strict Liquid rendering.
+tags:
+  - git
+  - liquid
+metadata:
+  projectId: website-engine-control-plane
+---
+
+## Immutable inputs
+
+Every build resolves one exact Git commit before rendering.
+
+## Verified output
+
+The generated release records source checksums and can be promoted atomically.
diff --git a/packages/site-definition/pages/index.md b/packages/site-definition/pages/index.md
new file mode 100644
index 0000000..f5e5932
--- /dev/null
+++ b/packages/site-definition/pages/index.md
@@ -0,0 +1,10 @@
+---
+model: page
+title: Labyricorn Engineering & Architecture
+slug: home
+route: /
+status: published
+summary: Deterministic publishing from immutable Git snapshots.
+---
+
+The control plane renders this homepage from committed Markdown and repository-owned Liquid templates.
diff --git a/packages/site-definition/projects/control-plane.md b/packages/site-definition/projects/control-plane.md
new file mode 100644
index 0000000..7a94acb
--- /dev/null
+++ b/packages/site-definition/projects/control-plane.md
@@ -0,0 +1,16 @@
+---
+model: project
+title: Website Engine Control Plane
+slug: website-engine-control-plane
+route: /project/website-engine-control-plane/
+status: published
+summary: A deterministic Git-native static site control plane.
+tags:
+  - static-site
+  - git
+  - liquid
+---
+
+## Configuration first
+
+The project page joins its allowlisted declaration with this committed Markdown body.
diff --git a/src/backend/buildEngine.test.ts b/src/backend/buildEngine.test.ts
index 876f2ab..abb8161 100644
--- a/src/backend/buildEngine.test.ts
+++ b/src/backend/buildEngine.test.ts
@@ -49,7 +49,10 @@ test("reference repository theme renders declared routes and only declared asset
     const result = new BuildEngine(output).build(input);
     assert.equal(result.success, true);
     assert.match(input.siteDefinition.commit, /^[0-9a-f]{40}$/);
+    assert.equal(input.contentItems.length, 3);
     assert.ok(fs.existsSync(path.join(result.outputDirectory, "index.html")));
+    assert.ok(fs.existsSync(path.join(result.outputDirectory, "articles/index.html")));
+    assert.ok(fs.existsSync(path.join(result.outputDirectory, "articles/repository-rendering/index.html")));
     assert.ok(fs.existsSync(path.join(result.outputDirectory, "projects/index.html")));
     assert.ok(fs.existsSync(path.join(result.outputDirectory, "project/website-engine-control-plane/index.html")));
     assert.ok(fs.existsSync(path.join(result.outputDirectory, "project/website-engine-control-plane/demo.html")));
@@ -62,6 +65,9 @@ test("reference repository theme renders declared routes and only declared asset
     assert.equal(manifest.siteDefinition.commit, input.siteDefinition.commit);
     assert.equal(manifest.theme.commit, input.theme.snapshot.commit);
     assert.equal(manifest.artifactBuildId, input.artifactBuildId);
+    assert.match(fs.readFileSync(path.join(result.outputDirectory, "index.html"), "utf8"), /renders this homepage from committed Markdown/);
+    assert.match(fs.readFileSync(path.join(result.outputDirectory, "articles/repository-rendering/index.html"), "utf8"), /Every build resolves one exact Git commit/);
+    assert.match(fs.readFileSync(path.join(result.outputDirectory, "project/website-engine-control-plane/index.html"), "utf8"), /joins its allowlisted declaration/);
     assert.doesNotMatch(fs.readFileSync(path.join(result.outputDirectory, "index.html"), "utf8"), /fonts\.googleapis|tailwindcss\.com/);
   } finally { manager.dispose(); }
 }));
@@ -152,6 +158,21 @@ test("project declaration controls the project route and standalone publication"
   } finally { manager.dispose(); }
 }));
 
+
+test("project declarations cannot silently shadow non-project content", () => withRepository((root, output) => {
+  fs.rmSync(path.join(root, "packages/site-definition/projects/control-plane.md"));
+  fs.writeFileSync(path.join(root, "packages/site-definition/projects/.gitkeep"), "");
+  const article = path.join(root, "packages/site-definition/articles/welcome.md");
+  fs.writeFileSync(article, fs.readFileSync(article, "utf8").replace("route: /articles/repository-rendering/", "route: /project/website-engine-control-plane/"));
+  commit(root, "create route collision");
+  const { manager, input } = load(root, "route-collision");
+  try {
+    const result = new BuildEngine(output).build(input);
+    assert.equal(result.success, false);
+    assert.ok(result.validationReport.errors.some((error) => error.code === "E_ROUTE_COLLISION"));
+  } finally { manager.dispose(); }
+}));
+
 test("declared standalone files are copied byte-for-byte", () => withRepository((root, output) => {
   const { manager, input } = load(root, "publication");
   try {
diff --git a/src/backend/buildInputLoader.ts b/src/backend/buildInputLoader.ts
index 30c54a4..1b4781f 100644
--- a/src/backend/buildInputLoader.ts
+++ b/src/backend/buildInputLoader.ts
@@ -5,14 +5,13 @@ import path from "node:path";
 import YAML from "yaml";
 import {
   ContentItem,
-  ContentModel,
-  MediaAsset,
   ProjectDeclaration,
   ResolvedBuildInput,
   ResolvedProject,
   ResolvedPublishedFile,
   SiteConfig,
 } from "../types";
+import { loadRepositoryContent } from "./contentLoader";
 import { RepositorySnapshotManager } from "./repositories/repositorySnapshot";
 import { canonicalPath, parseProjects, resolveRegularFile, ThemeLoader } from "./theme/themeLoader";
 
@@ -32,6 +31,11 @@ export interface BuildInputLoaderOptions {
   builderVersion: string;
 }
 
+const normalizedRoute = (route: string): string => {
+  const parts = route.split("/").filter(Boolean);
+  return parts.length === 0 ? "/" : `/${parts.join("/")}/`;
+};
+
 export class BuildInputLoader {
   private readonly snapshots: RepositorySnapshotManager;
   private readonly repositoryRoot: string;
@@ -53,9 +57,10 @@ export class BuildInputLoader {
     const configRoot = path.join(siteDefinition.checkoutRoot, ...this.siteDefinitionPath.split("/"));
     const inputChecksums: Record<string, string> = {};
     const readConfig = (relative: string): Buffer => {
-      const file = resolveRegularFile(configRoot, relative, `configuration '${relative}'`, 2 * 1024 * 1024);
+      const canonical = canonicalPath(relative, "configuration path");
+      const file = resolveRegularFile(configRoot, canonical, `configuration '${relative}'`, 2 * 1024 * 1024);
       const bytes = fs.readFileSync(file);
-      inputChecksums[`${this.siteDefinitionPath}/${canonicalPath(relative, "configuration path")}`] = sha256(bytes);
+      inputChecksums[path.posix.join(this.siteDefinitionPath, canonical)] = sha256(bytes);
       return bytes;
     };
 
@@ -64,26 +69,16 @@ export class BuildInputLoader {
     if (siteDocument.protocol !== "labyricorn-site/v1") throw new Error("E_SITE_CONFIG_INVALID: unsupported site protocol.");
     const navigationRelative = siteDocument.navigationFile ?? "navigation.yml";
     const navigationDocument = YAML.parse(readConfig(navigationRelative).toString("utf8"));
-
-    const contentModels: ContentModel[] = [];
-    const modelRoot = path.join(siteDefinition.checkoutRoot, "packages", "content-models");
-    if (fs.existsSync(modelRoot)) {
-      for (const name of fs.readdirSync(modelRoot).sort()) {
-        const modelFile = path.join(modelRoot, name, "model.yml");
-        if (!fs.existsSync(modelFile) || !fs.statSync(modelFile).isFile()) continue;
-        const bytes = fs.readFileSync(modelFile);
-        inputChecksums[`packages/content-models/${name}/model.yml`] = sha256(bytes);
-        contentModels.push(YAML.parse(bytes.toString("utf8")));
-      }
-    }
+    const loadedContent = loadRepositoryContent(siteDefinition, configRoot, siteDocument, inputChecksums);
 
     const siteConfig: SiteConfig = {
       protocol: siteDocument.protocol,
       site: siteDocument.site,
       navigation: navigationDocument.navigation ?? [],
-      contentModels,
+      contentModels: loadedContent.contentModels,
+      contentModelsPath: loadedContent.contentModelsPath,
       sourcesFile: siteDocument.sourcesFile ?? "sources.yml",
-      styleInstancesPath: siteDocument.styleInstancesPath ?? "../style-configs",
+      styleInstancesPath: siteDocument.styleInstancesPath ?? "style-configs",
       pagesPath: siteDocument.pagesPath ?? "pages",
       navigationFile: navigationRelative,
       projectsFile: siteDocument.projectsFile,
@@ -100,20 +95,32 @@ export class BuildInputLoader {
     };
 
     let declarations: ProjectDeclaration[] = [];
-    if (siteConfig.projectsFile) {
-      const bytes = readConfig(siteConfig.projectsFile);
-      declarations = parseProjects(bytes);
-    }
-    const requiredSections = siteConfig.navigation.filter((entry) => entry.route !== "/").map((entry) => entry.presentation?.sectionTemplate ?? entry.contentModel).filter((value): value is string => Boolean(value));
-    const requiredContent = declarations.map((project) => project.presentation.detailTemplate);
+    if (siteConfig.projectsFile) declarations = parseProjects(readConfig(siteConfig.projectsFile));
+    const contentItems = loadedContent.contentItems;
+    const mediaAssets = loadedContent.mediaAssets;
+    const declaredProjectRoutes = new Set(declarations.map((project) => normalizedRoute(project.route)));
+    const projectContentByRoute = new Map(
+      contentItems
+        .filter((item) => item.artifactType === "project" && item.status === "published")
+        .map((item) => [normalizedRoute(item.route), item]),
+    );
+
+    const requiredSections = siteConfig.navigation
+      .filter((entry) => entry.route !== "/")
+      .map((entry) => entry.presentation?.sectionTemplate ?? entry.contentModel)
+      .filter((value): value is string => Boolean(value));
+    const requiredContent = [...new Set([
+      ...declarations.map((project) => project.presentation.detailTemplate),
+      ...contentItems
+        .filter((item) => item.status === "published" && item.route !== "/" && item.artifactType !== "project")
+        .map((item) => item.presentation?.standalone ?? item.artifactType),
+    ])];
     const themeSnapshot = sourceMap.get(siteConfig.theme.source);
     if (!themeSnapshot) throw new Error(`E_THEME_SOURCE: configured source '${siteConfig.theme.source}' is unresolved.`);
     const themeRoot = path.posix.join(this.siteDefinitionPath, siteConfig.theme.path);
     const theme = new ThemeLoader().load(themeSnapshot, themeRoot, requiredSections, requiredContent);
-    for (const [relative, checksum] of Object.entries(theme.checksums)) inputChecksums[`${themeRoot}/${relative}`] = checksum;
+    for (const [relative, checksum] of Object.entries(theme.checksums)) inputChecksums[path.posix.join(themeRoot, relative)] = checksum;
 
-    const contentItems: ContentItem[] = [];
-    const mediaAssets: MediaAsset[] = [];
     const projects: ResolvedProject[] = [];
     const publishedFiles: ResolvedPublishedFile[] = [];
     for (const project of declarations) {
@@ -121,11 +128,21 @@ export class BuildInputLoader {
       if (!sourceSnapshot) throw new Error(`E_PROJECT_SOURCE: project '${project.id}' uses unresolved source '${project.source}'.`);
       const relatedContent: Record<string, readonly ContentItem[]> = {};
       for (const [key, relationship] of Object.entries(project.relationships ?? {})) {
-        const matches = contentItems.filter((item) => item.status === "published" && item.artifactType === relationship.contentModel && item.metadata?.[relationship.matchField.slice("metadata.".length) as keyof NonNullable<ContentItem["metadata"]>] === project.id).sort((a, b) => a.route.localeCompare(b.route) || a.id.localeCompare(b.id));
+        const metadataKey = relationship.matchField.slice("metadata.".length);
+        const matches = contentItems
+          .filter((item) => item.status === "published" && item.artifactType === relationship.contentModel && item.metadata?.[metadataKey] === project.id)
+          .sort((a, b) => a.route.localeCompare(b.route) || a.id.localeCompare(b.id));
         if (relationship.required && matches.length === 0) throw new Error(`E_PROJECT_RELATIONSHIP: required relationship '${key}' for '${project.id}' has no matches.`);
         relatedContent[key] = matches;
       }
-      projects.push(Object.freeze({ ...project, sourceSnapshot, relatedContent: Object.freeze(relatedContent) }));
+      projects.push(Object.freeze({
+        ...project,
+        sourceSnapshot,
+        relatedContent: Object.freeze(relatedContent),
+        contentItem: declaredProjectRoutes.has(normalizedRoute(project.route))
+          ? projectContentByRoute.get(normalizedRoute(project.route))
+          : undefined,
+      }));
       for (const publication of project.publishedFiles ?? []) {
         const sourcePath = canonicalPath(publication.source, `published file for '${project.id}'`);
         const absolute = resolveRegularFile(sourceSnapshot.checkoutRoot, sourcePath, `published file '${sourcePath}'`);
@@ -145,10 +162,23 @@ export class BuildInputLoader {
     };
     const artifactBuildId = `sha256-${sha256(stableJson(descriptor))}`;
     const generatedAt = [...sourceMap.values()].map((source) => source.committedAt).sort().at(-1)!;
-    return Object.freeze({ runId, artifactBuildId, generatedAt, siteDefinition, sources: sourceMap, siteConfig: Object.freeze(siteConfig), theme, projects: Object.freeze(projects), contentItems: Object.freeze(contentItems), mediaAssets: Object.freeze(mediaAssets), publishedFiles: Object.freeze(publishedFiles), inputChecksums: Object.freeze(inputChecksums) });
+    return Object.freeze({
+      runId,
+      artifactBuildId,
+      generatedAt,
+      siteDefinition,
+      sources: sourceMap,
+      siteConfig: Object.freeze(siteConfig),
+      theme,
+      projects: Object.freeze(projects),
+      contentItems: Object.freeze(contentItems),
+      mediaAssets: Object.freeze(mediaAssets),
+      publishedFiles: Object.freeze(publishedFiles),
+      inputChecksums: Object.freeze(inputChecksums),
+    });
   }
 
   dispose(): void {
     this.snapshots.dispose();
   }
-}
+}
\ No newline at end of file
diff --git a/src/backend/contentLoader.ts b/src/backend/contentLoader.ts
new file mode 100644
index 0000000..447e652
--- /dev/null
+++ b/src/backend/contentLoader.ts
@@ -0,0 +1,277 @@
+import crypto from "node:crypto";
+import fs from "node:fs";
+import path from "node:path";
+import YAML from "yaml";
+import {
+  ContentItem,
+  ContentModel,
+  MediaAsset,
+  RepositorySnapshot,
+} from "../types";
+import {
+  canonicalPath,
+  resolveRegularFile,
+  ThemeContractError,
+} from "./theme/themeLoader";
+
+const MAX_CONTENT_BYTES = 2 * 1024 * 1024;
+const sha256 = (value: Buffer | string) =>
+  crypto.createHash("sha256").update(value).digest("hex");
+
+const issue = (code: string, message: string, file?: string): never => {
+  throw new ThemeContractError([
+    { code, message, file, category: "content" },
+  ]);
+};
+
+const repositoryRelative = (snapshot: RepositorySnapshot, absolute: string): string =>
+  path.relative(snapshot.checkoutRoot, absolute).replace(/\\/g, "/");
+
+const resolveDirectory = (root: string, relative: string, label: string): string => {
+  const canonical = canonicalPath(relative, label);
+  const rootReal = fs.realpathSync(root);
+  const candidate = path.resolve(root, ...canonical.split("/"));
+  let real: string;
+  try {
+    real = fs.realpathSync(candidate);
+  } catch {
+    return issue("E_CONTENT_PATH_INVALID", `${label} does not exist.`, relative);
+  }
+  if (real !== rootReal && !real.startsWith(`${rootReal}${path.sep}`)) {
+    return issue("E_THEME_PATH_ESCAPE", `${label} resolves outside its allowed root.`, relative);
+  }
+  if (!fs.statSync(real).isDirectory()) {
+    return issue("E_CONTENT_PATH_INVALID", `${label} must be a directory.`, relative);
+  }
+  return real;
+};
+
+const walkFiles = (root: string): string[] => {
+  const files: string[] = [];
+  const visit = (directory: string): void => {
+    for (const entry of fs.readdirSync(directory, { withFileTypes: true }).sort((a, b) => a.name.localeCompare(b.name))) {
+      const absolute = path.join(directory, entry.name);
+      const stat = fs.lstatSync(absolute);
+      if (stat.isSymbolicLink()) {
+        issue("E_THEME_PATH_ESCAPE", `Configured content path contains symlink '${entry.name}'.`, entry.name);
+      }
+      if (stat.isDirectory()) visit(absolute);
+      else if (stat.isFile()) files.push(absolute);
+      else issue("E_CONTENT_PATH_INVALID", `Configured content path contains a non-regular entry '${entry.name}'.`, entry.name);
+    }
+  };
+  visit(root);
+  return files;
+};
+
+const parseFrontMatter = (bytes: Buffer, relative: string): { attributes: Record<string, unknown>; body: string } => {
+  if (bytes.length > MAX_CONTENT_BYTES) {
+    return issue("E_CONTENT_TOO_LARGE", `Content '${relative}' exceeds ${MAX_CONTENT_BYTES} bytes.`, relative);
+  }
+  const source = bytes.toString("utf8").replace(/\r\n/g, "\n");
+  const match = source.match(/^---\n([\s\S]*?)\n---(?:\n|$)([\s\S]*)$/);
+  if (!match) return issue("E_CONTENT_FRONT_MATTER", `Content '${relative}' is missing YAML front matter.`, relative);
+  let attributes: unknown;
+  try {
+    attributes = YAML.parse(match[1]);
+  } catch (error) {
+    return issue("E_CONTENT_FRONT_MATTER", `Content '${relative}' has invalid YAML: ${error instanceof Error ? error.message : String(error)}`, relative);
+  }
+  if (!attributes || typeof attributes !== "object" || Array.isArray(attributes)) {
+    return issue("E_CONTENT_FRONT_MATTER", `Content '${relative}' front matter must be a mapping.`, relative);
+  }
+  return { attributes: attributes as Record<string, unknown>, body: match[2] };
+};
+
+const stringValue = (value: unknown, field: string, relative: string, required = false): string => {
+  if (value === undefined || value === null || value === "") {
+    if (required) issue("E_CONTENT_FRONT_MATTER", `Content '${relative}' requires '${field}'.`, relative);
+    return "";
+  }
+  if (typeof value === "string" || typeof value === "number") return String(value);
+  if (value instanceof Date) return value.toISOString().replace(/T00:00:00\.000Z$/, "");
+  return issue("E_CONTENT_FRONT_MATTER", `Content '${relative}' field '${field}' must be scalar.`, relative);
+};
+
+const stringArray = (value: unknown, field: string, relative: string): string[] => {
+  if (value === undefined || value === null) return [];
+  if (!Array.isArray(value) || value.some((item) => typeof item !== "string")) {
+    return issue("E_CONTENT_FRONT_MATTER", `Content '${relative}' field '${field}' must be a string array.`, relative);
+  }
+  return [...value];
+};
+
+const normalizeRoute = (value: string, relative: string): string => {
+  if (!value.startsWith("/") || value.includes("\\") || value.includes("\0") || /[?#]/.test(value)) {
+    return issue("E_ROUTE_INVALID", `Content '${relative}' has invalid route '${value}'.`, relative);
+  }
+  const parts = value.split("/").filter(Boolean);
+  if (parts.some((part) => part === "." || part === "..")) {
+    return issue("E_ROUTE_INVALID", `Content '${relative}' route escapes the site root.`, relative);
+  }
+  return parts.length === 0 ? "/" : `/${parts.join("/")}/`;
+};
+
+const mimeType = (filename: string): string => {
+  switch (path.extname(filename).toLowerCase()) {
+    case ".svg": return "image/svg+xml";
+    case ".png": return "image/png";
+    case ".jpg":
+    case ".jpeg": return "image/jpeg";
+    case ".webp": return "image/webp";
+    case ".gif": return "image/gif";
+    default: return "application/octet-stream";
+  }
+};
+
+export interface LoadedRepositoryContent {
+  contentModels: ContentModel[];
+  contentModelsPath?: string;
+  contentItems: ContentItem[];
+  mediaAssets: MediaAsset[];
+}
+
+export const loadRepositoryContent = (
+  snapshot: RepositorySnapshot,
+  configRoot: string,
+  siteDocument: Record<string, any>,
+  inputChecksums: Record<string, string>,
+): LoadedRepositoryContent => {
+  const configuredModelsPath = siteDocument.contentModelsPath
+    ? canonicalPath(String(siteDocument.contentModelsPath), "contentModelsPath")
+    : undefined;
+  const legacyModelRoot = path.join(snapshot.checkoutRoot, "packages", "content-models");
+  const modelRoot = configuredModelsPath
+    ? resolveDirectory(configRoot, configuredModelsPath, "contentModelsPath")
+    : fs.existsSync(path.join(configRoot, "content-models"))
+      ? resolveDirectory(configRoot, "content-models", "contentModelsPath")
+      : fs.existsSync(legacyModelRoot)
+        ? legacyModelRoot
+        : undefined;
+  const contentModels: ContentModel[] = [];
+  if (modelRoot) {
+    for (const name of fs.readdirSync(modelRoot).sort()) {
+      const modelFile = path.join(modelRoot, name, "model.yml");
+      if (!fs.existsSync(modelFile)) continue;
+      const resolved = resolveRegularFile(modelRoot, `${name}/model.yml`, `content model '${name}'`, MAX_CONTENT_BYTES);
+      const bytes = fs.readFileSync(resolved);
+      const parsed = YAML.parse(bytes.toString("utf8")) as ContentModel;
+      if (!parsed?.id || parsed.kind !== "content-model") {
+        issue("E_CONTENT_MODEL_INVALID", `Content model '${name}' is invalid.`, repositoryRelative(snapshot, resolved));
+      }
+      contentModels.push(parsed);
+      inputChecksums[repositoryRelative(snapshot, resolved)] = sha256(bytes);
+    }
+  }
+
+  let participation: Record<string, any> = {};
+  const participationCandidate = path.join(configRoot, ".labyricorn", "site.yml");
+  if (fs.existsSync(participationCandidate)) {
+    const participationFile = resolveRegularFile(configRoot, ".labyricorn/site.yml", "repository participation policy", MAX_CONTENT_BYTES);
+    const bytes = fs.readFileSync(participationFile);
+    participation = YAML.parse(bytes.toString("utf8")) ?? {};
+    inputChecksums[repositoryRelative(snapshot, participationFile)] = sha256(bytes);
+  }
+  const contentPaths = participation.artifacts?.content_paths ?? [siteDocument.pagesPath ?? "pages"];
+  const mediaPaths = participation.artifacts?.media_paths ?? [];
+  if (!Array.isArray(contentPaths) || contentPaths.some((entry: unknown) => typeof entry !== "string")) {
+    issue("E_CONTENT_PATH_INVALID", "artifacts.content_paths must be a string array.", ".labyricorn/site.yml");
+  }
+  if (!Array.isArray(mediaPaths) || mediaPaths.some((entry: unknown) => typeof entry !== "string")) {
+    issue("E_CONTENT_PATH_INVALID", "artifacts.media_paths must be a string array.", ".labyricorn/site.yml");
+  }
+
+  const modelById = new Map(contentModels.map((model) => [model.id, model]));
+  const contentItems: ContentItem[] = [];
+  const routes = new Set<string>();
+  for (const configuredPath of contentPaths as string[]) {
+    const contentRoot = resolveDirectory(configRoot, configuredPath, `content path '${configuredPath}'`);
+    for (const absolute of walkFiles(contentRoot).filter((file) => file.toLowerCase().endsWith(".md"))) {
+      const relative = repositoryRelative(snapshot, absolute);
+      const bytes = fs.readFileSync(absolute);
+      const { attributes, body } = parseFrontMatter(bytes, relative);
+      const artifactType = stringValue(attributes.model, "model", relative, true);
+      const model = modelById.get(artifactType);
+      if (!model) issue("E_CONTENT_MODEL_INVALID", `Content '${relative}' references unknown model '${artifactType}'.`, relative);
+      const title = stringValue(attributes.title, "title", relative, true);
+      const slug = stringValue(attributes.slug, "slug", relative) || path.basename(relative, path.extname(relative));
+      const configuredRoute = stringValue(attributes.route, "route", relative);
+      const derivedRoute = model.routing?.detail?.replace("{slug}", slug);
+      const route = normalizeRoute(configuredRoute || derivedRoute || `/${slug}/`, relative);
+      if (routes.has(route)) issue("E_ROUTE_COLLISION", `Multiple content documents declare '${route}'.`, relative);
+      routes.add(route);
+      const status = stringValue(attributes.status, "status", relative, true);
+      if (!(["published", "draft", "archived"] as string[]).includes(status)) {
+        issue("E_CONTENT_FRONT_MATTER", `Content '${relative}' has invalid status '${status}'.`, relative);
+      }
+      const metadata = attributes.metadata && typeof attributes.metadata === "object" && !Array.isArray(attributes.metadata)
+        ? { ...(attributes.metadata as Record<string, unknown>) }
+        : {};
+      for (const key of ["projectId", "projectName", "projectUrl"]) {
+        if (attributes[key] !== undefined) metadata[key] = attributes[key];
+      }
+      const presentation = attributes.presentation && typeof attributes.presentation === "object" && !Array.isArray(attributes.presentation)
+        ? attributes.presentation as ContentItem["presentation"]
+        : undefined;
+      contentItems.push({
+        id: `${snapshot.sourceId}:${relative}`,
+        title,
+        slug,
+        published: stringValue(attributes.published ?? attributes.date, "published", relative) || snapshot.committedAt,
+        updated: stringValue(attributes.updated, "updated", relative) || snapshot.committedAt,
+        author: stringValue(attributes.author, "author", relative) || undefined,
+        status: status as ContentItem["status"],
+        artifactType,
+        summary: stringValue(attributes.summary, "summary", relative),
+        featuredImage: stringValue(attributes.featuredImage, "featuredImage", relative) || undefined,
+        tags: stringArray(attributes.tags, "tags", relative),
+        presentation,
+        aliases: stringArray(attributes.aliases, "aliases", relative),
+        sourceRepo: snapshot.sourceId,
+        path: relative,
+        contentMarkdown: body,
+        mediaReferences: [],
+        youtubeDirectives: [],
+        wikipediaLinks: [],
+        validationStatus: "valid",
+        validationMessages: [],
+        route,
+        styleInstanceId: model.presentation?.default_style_config ?? artifactType,
+        metadata,
+      });
+      inputChecksums[relative] = sha256(bytes);
+    }
+  }
+
+  const mediaAssets: MediaAsset[] = [];
+  for (const configuredPath of mediaPaths as string[]) {
+    const mediaRoot = resolveDirectory(configRoot, configuredPath, `media path '${configuredPath}'`);
+    for (const absolute of walkFiles(mediaRoot).filter((file) => !path.basename(file).startsWith("."))) {
+      const bytes = fs.readFileSync(absolute);
+      const sourcePath = repositoryRelative(snapshot, absolute);
+      const localRelative = path.relative(mediaRoot, absolute).replace(/\\/g, "/");
+      const publicPath = `/media/${localRelative}`;
+      const checksum = sha256(bytes);
+      mediaAssets.push({
+        id: `${snapshot.sourceId}:${sourcePath}`,
+        sourceRepo: snapshot.sourceId,
+        originalPath: sourcePath,
+        sourcePath,
+        sourceChecksum: checksum,
+        publicNamespacePath: publicPath,
+        filename: path.basename(absolute),
+        sizeBytes: bytes.length,
+        mimeType: mimeType(absolute),
+        isValidated: true,
+      });
+      inputChecksums[sourcePath] = checksum;
+    }
+  }
+
+  return {
+    contentModels: contentModels.sort((a, b) => a.id.localeCompare(b.id)),
+    contentModelsPath: configuredModelsPath,
+    contentItems: contentItems.sort((a, b) => a.route.localeCompare(b.route) || a.id.localeCompare(b.id)),
+    mediaAssets: mediaAssets.sort((a, b) => a.publicNamespacePath.localeCompare(b.publicNamespacePath)),
+  };
+};
\ No newline at end of file
diff --git a/src/backend/repositoryBuildEngine.ts b/src/backend/repositoryBuildEngine.ts
index 9332826..ba64329 100644
--- a/src/backend/repositoryBuildEngine.ts
+++ b/src/backend/repositoryBuildEngine.ts
@@ -91,7 +91,7 @@ export const renderMarkdown = (markdown: string): string => renderMarkdownDocume
 
 class StrictLiquidRenderer {
   private readonly liquid: Liquid;
-  private readonly allowedFilters = new Set(["escape", "safe_content", "safe_page_body"]);
+  private readonly allowedFilters = new Set(["escape", "join", "safe_content", "safe_page_body"]);
 
   constructor(partialsRoot: string) {
     this.liquid = new Liquid({ root: [partialsRoot], extname: ".liquid", strictVariables: true, strictFilters: true, dynamicPartials: false, relativeReference: false });
@@ -117,6 +117,16 @@ class StrictLiquidRenderer {
   }
 }
 
+const escapeContext = (value: unknown): unknown => {
+  if (value instanceof SafeHtml || value === null || value === undefined) return value;
+  if (typeof value === "string") return escapeHtml(value);
+  if (Array.isArray(value)) return value.map(escapeContext);
+  if (typeof value === "object") {
+    return Object.fromEntries(Object.entries(value as Record<string, unknown>).map(([key, child]) => [key, escapeContext(child)]));
+  }
+  return value;
+};
+
 const normalizeDirectoryRoute = (route: string): string => {
   if (!route.startsWith("/") || route.includes("\0") || route.includes("\\") || /[?#]/.test(route)) throw new Error(`E_ROUTE_INVALID: invalid route '${route}'.`);
   const parts = route.split("/").filter(Boolean);
@@ -202,7 +212,8 @@ export class BuildEngine {
     for (const project of input.projects) claim(directoryRouteFile(project.route), `project:${project.id}`);
     for (const publication of input.publishedFiles) claim(literalRouteFile(publication.route), `published:${publication.projectId}`);
     for (const item of input.contentItems.filter((candidate) => candidate.status === "published")) {
-      claim(directoryRouteFile(item.route), `content:${item.id}`);
+      const route = normalizeDirectoryRoute(item.route);
+      if (item.artifactType !== "project" && route !== "/") claim(directoryRouteFile(route), `content:${item.id}`);
       const markdownWithoutCode = item.contentMarkdown.replace(/```[\s\S]*?```/g, "").replace(/`[^`]*`/g, "");
       if (!input.siteConfig.markdown.rawHtmlEnabled && /<\/?[A-Za-z][^>]*>/.test(markdownWithoutCode)) { report.htmlPolicyViolations.push(item.path); report.errors.push({ code: "E_RAW_HTML_DISABLED", message: `Raw HTML is disabled in '${item.path}'.`, file: item.path, category: "markdown" }); }
     }
@@ -233,6 +244,11 @@ export class BuildEngine {
     };
     try {
       for (const relative of [...input.theme.manifest.assets.styles, ...input.theme.manifest.assets.scripts, ...input.theme.manifest.assets.files]) write(relative, fs.readFileSync(resolveRegularFile(input.theme.root, relative, `asset '${relative}'`)));
+      for (const media of input.mediaAssets) {
+        const snapshot = input.sources.get(media.sourceRepo);
+        if (!snapshot || !media.sourcePath) throw new Error(`E_MEDIA_SOURCE: unresolved media '${media.id}'.`);
+        write(media.publicNamespacePath.replace(/^\/+/, ""), fs.readFileSync(resolveRegularFile(snapshot.checkoutRoot, media.sourcePath, `media '${media.sourcePath}'`)));
+      }
       const fontCss: string[] = [];
       for (const font of input.theme.manifest.assets.fonts) {
         const released = this.resolveFont(font, input);
@@ -243,31 +259,105 @@ export class BuildEngine {
       for (const publication of input.publishedFiles) write(literalRouteFile(publication.route), fs.readFileSync(resolveRegularFile(publication.sourceSnapshot.checkoutRoot, publication.sourcePath, `published file '${publication.sourcePath}'`)));
 
       const renderer = new StrictLiquidRenderer(path.join(input.theme.root, "partials"));
-      const stylesheets = input.theme.manifest.assets.styles.map((asset) => `/${asset}`);
-      if (fontCss.length) stylesheets.push("/assets/styles/fonts.generated.css");
+      const styles = input.theme.manifest.assets.styles.map((asset) => `/${asset}`);
+      if (fontCss.length) styles.push("/assets/styles/fonts.generated.css");
       const scripts = input.theme.manifest.assets.scripts.map((asset) => `/${asset}`);
-      const navigation = input.siteConfig.navigation.map(({ id, label, route }) => ({ id, label, route: normalizeDirectoryRoute(route) }));
-      const base = { site: input.siteConfig.site, navigation, theme: { id: input.theme.manifest.id, version: input.theme.manifest.version, stylesheets, scripts, fontStylesheet: fontCss.length ? "/assets/styles/fonts.generated.css" : null }, build: { id: input.artifactBuildId, generatedAt: input.generatedAt } };
-      const page = (templateKey: string, title: string, context: Record<string, unknown>, output: string, route: string) => {
+      const navigation = input.siteConfig.navigation.map(({ id, label, route, contentModel, presentation }) => ({
+        id, label, route: normalizeDirectoryRoute(route), contentModel: contentModel ?? null,
+        templateKey: presentation?.sectionTemplate ?? contentModel ?? null,
+      }));
+      const sourceCommits = Object.fromEntries([...input.sources.entries()].map(([id, snapshot]) => [id, snapshot.commit]).sort(([a], [b]) => a.localeCompare(b)));
+      const base = {
+        site: input.siteConfig.site,
+        navigation,
+        theme: { id: input.theme.manifest.id, version: input.theme.manifest.version, assetBaseUrl: "/assets/", styles, scripts, fontStylesheet: fontCss.length ? "/assets/styles/fonts.generated.css" : null },
+        build: { id: input.artifactBuildId, generatedAt: input.generatedAt, sourceCommits },
+      };
+      const collectionItem = (item: ContentItem) => ({
+        id: item.id, contentModel: item.artifactType, templateKey: item.presentation?.standalone ?? item.artifactType,
+        title: item.title, route: normalizeDirectoryRoute(item.route), summary: item.summary || null,
+        published: item.published || null, tags: item.tags, metadata: item.metadata ?? {},
+      });
+      const renderedItemPage = (item: ContentItem, type: "home" | "content" = "content") => {
+        const rendered = renderMarkdownDocument(item.contentMarkdown);
+        const snapshot = input.sources.get(item.sourceRepo)!;
+        return {
+          type, contentModel: item.artifactType, templateKey: type === "home" ? "home" : item.presentation?.standalone ?? item.artifactType,
+          id: item.id, title: item.title, route: normalizeDirectoryRoute(item.route), summary: item.summary || null,
+          published: item.published || null, updated: item.updated ?? snapshot.committedAt, author: item.author ?? null, tags: item.tags,
+          metadata: { version: null, license: null, homepage: null, stack: [], ...(item.metadata ?? {}) }, provenance: { sourceId: snapshot.sourceId, repository: snapshot.repository, commit: snapshot.commit },
+          renderedContent: rendered.html, body: null, tableOfContents: rendered.toc, relationships: {}, publications: [],
+        };
+      };
+      const renderPage = (templateKey: string, pageContext: Record<string, unknown>, collection: { items: unknown[] }, output: string, route: string) => {
         const bodySource = input.theme.templateSources[templateKey];
         if (!bodySource) throw new Error(`E_PROJECT_TEMPLATE_UNRESOLVED: template '${templateKey}' is missing.`);
-        const body = new SafeHtml(renderer.render(bodySource, { ...base, ...context }, templateKey));
-        const html = renderer.render(input.theme.templateSources.layout, { ...base, ...context, page: { title, body } }, "layout");
+        const bodyContext = escapeContext({ ...base, page: pageContext, collection }) as Record<string, unknown>;
+        const body = new SafeHtml(renderer.render(bodySource, bodyContext, templateKey));
+        const layoutContext = escapeContext({ ...base, page: { ...pageContext, body }, collection }) as Record<string, unknown>;
+        const html = renderer.render(input.theme.templateSources.layout, layoutContext, "layout");
         write(output, html.endsWith("\n") ? html : `${html}\n`); routes.add(route);
       };
-      page("home", input.siteConfig.site.title, { content: input.contentItems }, "index.html", "/");
+
+      const projectRoutes = new Set(input.projects.map((project) => normalizeDirectoryRoute(project.route)));
+      const publishedItems = input.contentItems.filter((item) =>
+        item.status === "published" && (item.artifactType !== "project" || projectRoutes.has(normalizeDirectoryRoute(item.route))),
+      );
+      const homeItem = publishedItems.find((item) => normalizeDirectoryRoute(item.route) === "/");
+      const homePage = homeItem ? renderedItemPage(homeItem, "home") : {
+        type: "home", contentModel: "page", templateKey: "home", id: input.siteConfig.site.id, title: input.siteConfig.site.title,
+        route: "/", summary: null, published: null, updated: input.generatedAt, author: null, tags: [], metadata: {},
+        provenance: { sourceId: input.siteDefinition.sourceId, repository: input.siteDefinition.repository, commit: input.siteDefinition.commit },
+        renderedContent: new SafeHtml(""), body: null, tableOfContents: [], relationships: {}, publications: [],
+      };
+      const homeCollection = publishedItems.filter((item) => normalizeDirectoryRoute(item.route) !== "/").map(collectionItem);
+      renderPage("home", homePage, { items: homeCollection }, "index.html", "/");
+
       for (const entry of input.siteConfig.navigation.filter((item) => item.route !== "/")) {
         const key = entry.presentation?.sectionTemplate ?? entry.contentModel!;
-        const items = input.contentItems.filter((item) => item.status === "published" && item.artifactType === entry.contentModel);
-        page(`sections.${key}`, entry.label, { section: entry, content: items }, directoryRouteFile(entry.route), normalizeDirectoryRoute(entry.route));
+        const contentCollection = publishedItems.filter((item) => item.artifactType === entry.contentModel).map(collectionItem);
+        const projectCollection = input.projects.map((project) => project.contentItem ? collectionItem(project.contentItem) : ({
+          id: project.id, contentModel: "project", templateKey: project.presentation.detailTemplate, title: project.title ?? project.id,
+          route: normalizeDirectoryRoute(project.route), summary: project.summary ?? null, published: project.sourceSnapshot.committedAt,
+          tags: project.tags ?? [], metadata: { version: project.version ?? null, license: project.license ?? null, homepage: project.homepage ?? null, stack: project.stack ?? [] },
+        }));
+        const pageContext = {
+          type: "section", contentModel: entry.contentModel ?? null, templateKey: key, id: entry.id, title: entry.label,
+          route: normalizeDirectoryRoute(entry.route), summary: null, published: null, updated: input.generatedAt, author: null, tags: [], metadata: {},
+          provenance: { sourceId: input.siteDefinition.sourceId, repository: input.siteDefinition.repository, commit: input.siteDefinition.commit },
+          renderedContent: new SafeHtml(""), body: null, tableOfContents: [], relationships: {}, publications: [],
+        };
+        renderPage(`sections.${key}`, pageContext, { items: entry.contentModel === "project" ? projectCollection : contentCollection }, directoryRouteFile(entry.route), normalizeDirectoryRoute(entry.route));
       }
-      for (const project of input.projects) page(`content.${project.presentation.detailTemplate}`, project.title ?? project.id, { project: { ...project, sourceSnapshot: { sourceId: project.sourceSnapshot.sourceId, repository: project.sourceSnapshot.repository, commit: project.sourceSnapshot.commit, committedAt: project.sourceSnapshot.committedAt } } }, directoryRouteFile(project.route), normalizeDirectoryRoute(project.route));
-      for (const item of input.contentItems.filter((candidate) => candidate.status === "published")) {
-        const rendered = renderMarkdownDocument(item.contentMarkdown);
+
+      for (const project of input.projects) {
+        const route = normalizeDirectoryRoute(project.route);
+        const item = project.contentItem;
+        const rendered = item ? renderMarkdownDocument(item.contentMarkdown) : { html: new SafeHtml(""), toc: [] };
+        const relationships = Object.fromEntries(Object.entries(project.relatedContent).map(([key, items]) => [key, items.map((related) => ({ ...collectionItem(related), renderedContent: renderMarkdownDocument(related.contentMarkdown).html }))]));
+        const pageContext = {
+          type: "project", contentModel: "project", templateKey: project.presentation.detailTemplate, id: project.id,
+          title: project.title ?? item?.title ?? project.id, route, summary: project.summary ?? item?.summary ?? null,
+          published: item?.published ?? project.sourceSnapshot.committedAt, updated: item?.updated ?? project.sourceSnapshot.committedAt, author: item?.author ?? null,
+          tags: project.tags ?? item?.tags ?? [], metadata: { ...(item?.metadata ?? {}), version: project.version ?? null, license: project.license ?? null, homepage: project.homepage ?? null, stack: project.stack ?? [] },
+          provenance: { sourceId: project.sourceSnapshot.sourceId, repository: project.sourceSnapshot.repository, commit: project.sourceSnapshot.commit },
+          renderedContent: rendered.html, body: null, tableOfContents: rendered.toc, relationships, publications: project.publishedFiles ?? [],
+        };
+        renderPage(`content.${project.presentation.detailTemplate}`, pageContext, { items: [] }, directoryRouteFile(route), route);
+      }
+
+      for (const item of publishedItems) {
+        const route = normalizeDirectoryRoute(item.route);
+        if (route === "/" || item.artifactType === "project" || projectRoutes.has(route)) continue;
         const key = item.presentation?.standalone ?? item.artifactType;
-        page(`content.${key}`, item.title, { item: { ...item, content: rendered.html, tableOfContents: rendered.toc } }, directoryRouteFile(item.route), normalizeDirectoryRoute(item.route));
+        renderPage(`content.${key}`, renderedItemPage(item), { items: [] }, directoryRouteFile(route), route);
       }
-      page("notFound", "Not Found", {}, "404.html", "/404.html");
+      const notFoundPage = {
+        type: "notFound", contentModel: null, templateKey: "notFound", id: null, title: "Not Found", route: "/404.html", summary: null,
+        published: null, updated: input.generatedAt, author: null, tags: [], metadata: {}, provenance: { sourceId: input.siteDefinition.sourceId, repository: input.siteDefinition.repository, commit: input.siteDefinition.commit },
+        renderedContent: new SafeHtml(""), body: null, tableOfContents: [], relationships: {}, publications: [],
+      };
+      renderPage("notFound", notFoundPage, { items: [] }, "404.html", "/404.html");
 
       const declaredScripts = new Set(scripts);
       const releaseFiles = new Set(files);
diff --git a/src/types.ts b/src/types.ts
index 049e608..caa5b50 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -72,6 +72,8 @@ export interface ContentItem {
   status: "published" | "draft" | "archived";
   artifactType: string; // Matches ContentModel ID
   summary: string;
+  updated?: string;
+  author?: string;
   featuredImage?: string;
   tags: string[];
   presentation?: {
@@ -95,6 +97,7 @@ export interface ContentItem {
     projectId?: string;
     projectName?: string;
     projectUrl?: string;
+    [key: string]: unknown;
   };
 }
 
@@ -107,6 +110,8 @@ export interface MediaAsset {
   sizeBytes: number;
   mimeType: string;
   isValidated: boolean;
+  sourcePath?: string;
+  sourceChecksum?: string;
 }
 
 export interface ThemeConfig {
@@ -298,6 +303,7 @@ export interface SiteConfig {
   };
   navigation: NavigationEntry[];
   contentModels: ContentModel[];
+  contentModelsPath?: string;
   sourcesFile: string;
   styleInstancesPath: string;
   pagesPath: string;
@@ -455,6 +461,7 @@ export interface ProjectDeclaration {
 export interface ResolvedProject extends ProjectDeclaration {
   sourceSnapshot: RepositorySnapshot;
   relatedContent: Readonly<Record<string, readonly ContentItem[]>>;
+  contentItem?: ContentItem;
 }
 
 export interface ResolvedPublishedFile extends PublishedFile {