diff --git a/src/controller/config_repl.c b/src/controller/config_repl.c
index 1b1c6b64..71407518 100644
--- a/src/controller/config_repl.c
+++ b/src/controller/config_repl.c
@@ -23,6 +23,7 @@
 #include "clusterconfig.h"
 #include "cluster.h"
 #include "ha.h"
+#include "request.h"
 #include "utils.h"
 #include "wobj.h"
 #include "xce/cluster_def.h"
@@ -649,21 +650,17 @@ int handle_config_request(cluster_t *c, endpoint_t *ep, xce_request_t *req)
         return -EIO;
     }
 
-    reply.status      = 0;
-    rmsg->up_to_date  = 0;
-    rmsg->version_tag = my_tag;
-    /* sha256 and bytes are xce_data_t* — raw-byte encoding is wired in Task 11.
-     * For now set to NULL so encode_Data_ptr emits capn_null pointers.
-     * The standby will fall through to its saved config on this path until
-     * Task 11 completes the typemap shims.                                    */
-    rmsg->sha256 = NULL;
-    rmsg->bytes  = NULL;
-
-    xce_reply(ep, c->myhost, &reply);
+    int rc2 = xce_replconfig_reply_raw(ep, c->myhost, req->seq,
+                                        my_tag,
+                                        recomputed, 32,
+                                        bytes, blen);
     free(bytes);
+    /* rmsg is no longer needed — xce_replconfig_reply_raw builds capnp directly */
     free(rmsg);
     reply.data.replconfigreplymsg = NULL;
-    return 0;
+    if (rc2 != 0)
+        ERROR("handle_config_request: xce_replconfig_reply_raw failed: %d", rc2);
+    return rc2;
 }
 
 /* ── fetch_config_from_primary helpers ─────────────────────── */