diff --git a/app_server.py b/app_server.py
index e9cc0e7..302a31d 100644
--- a/app_server.py
+++ b/app_server.py
@@ -347,14 +347,23 @@ def build_and_publish(module, version):
         with zipfile.ZipFile(ext_zip_path, 'w', zipfile.ZIP_DEFLATED) as ext_zip:
             ext_zip.writestr('composer.json', json.dumps(composer, indent=2))
 
-            # Re-read archive and copy contents without the top-level dir
+            # Re-read archive and copy ONLY the installable payload, without the
+            # top-level dir. Mirror n8n IcF30 / build.sh: ship manifest.json +
+            # files/ + scripts/ only. Everything else (ARCHITECTURE.md, README.md,
+            # CHANGELOG.md, build.sh, .env.example, .taskmaster/, .claude/, .git,
+            # the repo's own composer.json) is dev/docs noise that must NOT reach a
+            # client install. composer.json is generated above.
+            INCLUDE_EXACT = {'manifest.json'}
+            INCLUDE_PREFIXES = ('files/', 'scripts/')
             with zipfile.ZipFile(archive_path) as src_zip:
                 for item in src_zip.namelist():
                     if item.endswith('/'):
                         continue
                     # Strip top-level directory
                     rel_path = item[len(prefix):] if prefix and item.startswith(prefix) else item
-                    if not rel_path or rel_path.startswith('.git'):
+                    if not rel_path:
+                        continue
+                    if rel_path not in INCLUDE_EXACT and not rel_path.startswith(INCLUDE_PREFIXES):
                         continue
                     ext_zip.writestr(rel_path, src_zip.read(item))