diff --git a/site/scripts/sync-wiki.mjs b/site/scripts/sync-wiki.mjs
index a8a8ad6d..a2464e78 100755
--- a/site/scripts/sync-wiki.mjs
+++ b/site/scripts/sync-wiki.mjs
@@ -63,6 +63,19 @@ function extractTitle(body, fallback) {
   return fallback;
 }
 
+/** Strip the first ATX H1 — Starlight already renders `title` as the page H1. */
+function stripLeadingH1(body) {
+  const lines = body.split(/\r?\n/);
+  let i = 0;
+  while (i < lines.length && lines[i].trim() === '') i += 1;
+  if (i < lines.length && /^#\s+/.test(lines[i])) {
+    i += 1;
+    while (i < lines.length && lines[i].trim() === '') i += 1;
+    return lines.slice(i).join('\n');
+  }
+  return body;
+}
+
 function yamlEscape(s) {
   if (/[:#{}[\],&*!|>'"%@`]|^[-?]|\n/.test(s) || s !== s.trim()) {
     return JSON.stringify(s);
@@ -158,6 +171,7 @@ function writeDoc(wikiRel, sourceAbs) {
 
   const fallbackTitle = path.basename(wikiRel, '.md');
   const title = extractTitle(body, fallbackTitle);
+  body = stripLeadingH1(body);
   body = rewriteMarkdownLinks(body, wikiRel);
 
   const out = `---\ntitle: ${yamlEscape(title)}\n---\n\n${body.trimStart()}`;
diff --git a/wiki/log/DEVLOG.md b/wiki/log/DEVLOG.md
index 51a41d70..8af8d953 100644
--- a/wiki/log/DEVLOG.md
+++ b/wiki/log/DEVLOG.md
@@ -5,6 +5,15 @@ Type: log
 ```
 Reverse chronological implementation notes. Keep this factual: what changed, why, checks, and spec impact.
 
+## 2026-07-08 - Starlight: strip leading H1 (no doubled titles)
+
+- Intent: Starlight renders frontmatter `title` as the page H1; sync was
+  also leaving the markdown `#` heading, so every page showed the title
+  twice.
+- Changed: `site/scripts/sync-wiki.mjs` strips the first ATX H1 after
+  extracting `title`; redeployed orphan `pages`.
+- Checks: sync spot-check on constitution + compute; `./tools/site-deploy.sh`.
+
 ## 2026-07-08 - Starlight site CI: sed + pnpm build scripts
 
 - Intent: `.tangled/workflows/site.yml` failed — pnpm's `astro` shim