diff --git a/scripts/__tests__/sync-org-docs.test.mjs b/scripts/__tests__/sync-org-docs.test.mjs
index e6e79a5d..b8b685c0 100644
--- a/scripts/__tests__/sync-org-docs.test.mjs
+++ b/scripts/__tests__/sync-org-docs.test.mjs
@@ -33,6 +33,8 @@ import {
   slugify,
   listOrgRepos,
   checkListing,
+  SKIP_DOCS_DIR,
+  DOCS_SUBDIR,
   PER_PAGE,
   DEFAULT_PAGE_SIZE,
 } from '../sync-org-docs.mjs';
@@ -544,6 +546,18 @@ test('an unpaginated gh yields only page 1 — the regression this guards', () =
 
 console.log('\ncheckListing');
 
+// ── tunaOS source mapping ────────────────────────────────────────────────────
+// tunaOS removed its old docs/book/src mdBook tree. The site keeps the
+// docs/tunaos pages hand-authored, so the sync must not silently revive the
+// removed source mapping or overwrite that tree from tunaOS/docs.
+
+console.log('\ntunaOS source mapping');
+
+test('does not map tunaOS to the removed mdBook path', () => {
+  assert.equal(DOCS_SUBDIR.tunaOS, undefined);
+  assert.ok(SKIP_DOCS_DIR.has('tunaOS'));
+});
+
 test('accepts a listing that is longer than the org public count', () => {
   const {fatal, warnings} = checkListing(137, 130);
   assert.deepEqual(fatal, []);
diff --git a/scripts/sync-org-docs.mjs b/scripts/sync-org-docs.mjs
index 8621e4dc..93e1c599 100644
--- a/scripts/sync-org-docs.mjs
+++ b/scripts/sync-org-docs.mjs
@@ -563,6 +563,8 @@ export {
   orgPublicRepoCount,
   checkListing,
   HAND_AUTHORED,
+  SKIP_DOCS_DIR,
+  DOCS_SUBDIR,
   PER_PAGE,
   DEFAULT_PAGE_SIZE,
 };