diff --git a/server.js b/server.js
index 3de5244..a7a43d3 100644
--- a/server.js
+++ b/server.js
@@ -57,20 +57,32 @@ export function normalizeObsidianMarkdown(content) {
 
   // 2. Convert wikilinks with label: [[target-slug|Custom Label]] -> [Custom Label](/posts/target-slug/)
   normalized = normalized.replace(/\[\[([^|\]]+)\|([^\]]+)\]\]/g, (match, target, label) => {
-    const slug = slugify(target);
-    return `[${label.trim()}](/posts/${slug}/)`;
+    return `[${label.trim()}](${wikilinkUrl(target)})`;
   });
 
   // 3. Convert simple wikilinks: [[target-slug]] -> [target-slug](/posts/target-slug/)
   normalized = normalized.replace(/\[\[([^\]]+)\]\]/g, (match, target) => {
     const trimmed = target.trim();
-    const slug = slugify(trimmed);
-    return `[${trimmed}](/posts/${slug}/)`;
+    return `[${trimmed}](${wikilinkUrl(trimmed)})`;
   });
 
   return normalized;
 }
 
+function wikilinkUrl(target) {
+  const trimmed = target.trim();
+  const fragmentIndex = trimmed.indexOf("#");
+
+  if (fragmentIndex === -1) {
+    return `/posts/${slugify(trimmed)}/`;
+  }
+
+  const noteSlug = slugify(trimmed.slice(0, fragmentIndex));
+  const headerSlug = slugify(trimmed.slice(fragmentIndex + 1));
+  const fragment = headerSlug ? `#${headerSlug}` : "";
+  return `/posts/${noteSlug}/${fragment}`;
+}
+
 function slugify(text) {
   return text
     .toLowerCase()
diff --git a/test/ingestion-api.test.js b/test/ingestion-api.test.js
index b8608f8..c26a48d 100644
--- a/test/ingestion-api.test.js
+++ b/test/ingestion-api.test.js
@@ -3,10 +3,27 @@ import assert from "node:assert/strict";
 import fs from "node:fs";
 import path from "node:path";
 import http from "node:http";
-import { createServer, triggerEleventyBuild } from "../server.js";
+import { createServer, normalizeObsidianMarkdown, triggerEleventyBuild } from "../server.js";
 
 const TEST_SECRET = "super-secret-test-token";
 
+test("Obsidian normalization: preserves linked note header fragments", () => {
+  const normalized = normalizeObsidianMarkdown(
+    "See [[a note#header one]] and [[another note#Second Header|the other section]]."
+  );
+
+  assert.match(
+    normalized,
+    /\[a note#header one\]\(\/posts\/a-note\/#header-one\)/,
+    "A wikilink header must become a URL fragment on the linked note"
+  );
+  assert.match(
+    normalized,
+    /\[the other section\]\(\/posts\/another-note\/#second-header\)/,
+    "Aliased wikilinks must retain their linked-note header fragment"
+  );
+});
+
 test("Ingestion API: rejects requests without proper Bearer token", async () => {
   const tmpDir = fs.mkdtempSync(path.join(process.cwd(), "test-tmp-site-"));
   const tmpPosts = fs.mkdtempSync(path.join(process.cwd(), "test-tmp-posts-"));