diff --git a/patch_index.py b/patch_index.py
index 675da0c..1ec80bb 100644
--- a/patch_index.py
+++ b/patch_index.py
@@ -40,4 +40,22 @@ if "x-coop-build" not in html:
     html = html.replace("</title>", "</title>\n    " + marker, 1)
 
 open(PATH, "w", encoding="utf-8").write(html)
+
+# 4. Web manifest identity: co-op name + a 512 icon installable as "any".
+#    (theme_color/background_color are fixed by the later Dockerfile sed.)
+MPATH = "/app/code/librechat/client/dist/manifest.webmanifest"
+try:
+    import json as _json
+
+    mf = _json.load(open(MPATH, encoding="utf-8"))
+    mf["name"] = "Inference Co\u2011op"
+    mf["short_name"] = "Inference"
+    mf["description"] = "Member-governed AI inference — private and renewable model choices."
+    for icon in mf.get("icons", []):
+        if icon.get("sizes") == "512x512":
+            icon["purpose"] = "any maskable"
+    open(MPATH, "w", encoding="utf-8").write(_json.dumps(mf, indent=2))
+    print("manifest: co-op identity set")
+except OSError:
+    raise SystemExit(0)
 print("index.html: co-op branding + build marker injected")