diff --git a/patch_v2/meowpanel/meowpanel.c b/patch_v2/meowpanel/meowpanel.c
index 0459168..df9e5c0 100644
--- a/patch_v2/meowpanel/meowpanel.c
+++ b/patch_v2/meowpanel/meowpanel.c
@@ -1682,6 +1682,16 @@ static int api_overview(int sock)
     sA(&s, ",\"svcd\":");
     svcd_fill(&s);
     sA(&s, "}");
+    /* 服务端自校验：发出前 jv_parse 自查，坏了留证+回 500（防「非 JSON 响应」破页，2026-09-02 间歇性事故） */
+    jv_t *chk = jv_parse(s.b ? s.b : "{}", (int)(s.b ? s.n : 2));
+    if (!chk && s.b) {
+        FILE *df = fopen("/tmp/overview_bad.json", "w");
+        if (df) { fwrite(s.b, 1, s.n, df); fclose(df); }
+        panel_log("overview: SELF-CHECK json invalid, raw dumped /tmp/overview_bad.json (%zu bytes)", s.n);
+        sbuf_free(&s);
+        return send_err(sock, 500, "INTERNAL", "overview 聚合输出未通过 JSON 自校验（原始数据已留 /tmp/overview_bad.json）");
+    }
+    if (chk) jv_free(chk);
     int rc = send_json(sock, 200, s.b ? s.b : "{}");
     sbuf_free(&s);
     return rc;