diff --git a/src/chat/chat_channel.c b/src/chat/chat_channel.c
index a2fbdb36..d3ed0f21 100644
--- a/src/chat/chat_channel.c
+++ b/src/chat/chat_channel.c
@@ -7,6 +7,7 @@
 #include "chat_core_priv.h"
 #include "group_avatar.h"
 #include "chat_event.h"
+#include "chat_feedback.h"
 #include "chat_setting.h"
 
 #include "../utun_instance.h"
@@ -61,6 +62,7 @@ static int channel_sign_join(const uint8_t* ch_x25519, const uint8_t* ch_ed25519
 void chat_core_ensure_channel_ready(struct UTUN_INSTANCE* inst, const char* ch_id) {
     struct chat_core_ctx* cc = CC(inst);
     if (!cc || !cc->initialized || !ch_id || !ch_id[0]) return;
+    if (chat_feedback_ensure_channel(inst, ch_id) < 0) return;
     if (si_find(inst, ch_id)) return;
 
     char tbl_msg[80]; msg_table_name(ch_id, tbl_msg, sizeof(tbl_msg));
diff --git a/src/chat/chat_sync.c b/src/chat/chat_sync.c
index ac3bcf0b..03c2ec93 100644
--- a/src/chat/chat_sync.c
+++ b/src/chat/chat_sync.c
@@ -14,6 +14,7 @@
 #include "../../lib/json_flat.h"
 #include "member_sync.h"
 #include "merkle_sync.h"
+#include "chat_feedback.h"
 
 #include "../utun_instance.h"
 #include "../transport_layer/etcp_api.h"
@@ -537,12 +538,21 @@ static void cs_resume_db_sync(struct chat_sync* cs, const char* ch_id) {
     if (si) db_sync_instance_set_gated(si, 0);
 }
 
+/* Подтверждение feedback не управляет готовностью участников или истории сообщений. */
+static void cs_feedback_done(uint64_t peer, const char* channel, int result, void* arg) {
+    (void)arg;
+    DEBUG_INFO(DEBUG_CATEGORY_CHAT_SYNC, "%s: feedback sync ch=%s peer=%016llx result=%d",
+        CS_ID, channel, (unsigned long long)peer, result);
+}
+
 static void _on_member_sync_done(uint64_t peer, const char* ns, int result, void* arg) {
     struct chat_sync* cs = (struct chat_sync*)arg;
     if (result == MT_OK) {
         struct channel_cache* ch = cs ? cs_find(cs, ns) : NULL;
         if (ch) ch->synced = CS_SYNC_DONE;
         cs_resume_db_sync(cs, ns);
+        if (cs && merkle_sync_start(cs->inst, MT_DATA_FEEDBACK, peer, ns, cs_feedback_done, cs) < 0)
+            DEBUG_WARN(DEBUG_CATEGORY_CHAT_SYNC, "%s: feedback sync unavailable ch=%s peer=%016llx", CS_ID, ns, (unsigned long long)peer);
     }
     DEBUG_INFO(DEBUG_CATEGORY_MEMBER_SYNC, "%s: member_sync %s ns=%s peer=%016llx",
                CS_ID, result == MT_OK ? "OK" : "FAIL", ns, (unsigned long long)peer);
@@ -753,6 +763,10 @@ int chat_sync_init(struct UTUN_INSTANCE* inst) {
         DEBUG_ERROR(DEBUG_CATEGORY_MEMBER_SYNC, "%s: member synchronization initialization failed", CS_ID);
         inst->chat_sync = NULL; u_free(cs); return -1;
     }
+    if (chat_feedback_init(inst) < 0) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CHAT_SYNC, "%s: feedback initialization failed", CS_ID);
+        member_sync_destroy(inst); inst->chat_sync = NULL; u_free(cs); return -1;
+    }
     if (group_avatar_init(inst) < 0) {
         member_sync_destroy(inst); inst->chat_sync = NULL; u_free(cs); return -1;
     }
diff --git a/src/routing_layer/topo_node_sqlite.c b/src/routing_layer/topo_node_sqlite.c
index bc59c903..c2d74619 100644
--- a/src/routing_layer/topo_node_sqlite.c
+++ b/src/routing_layer/topo_node_sqlite.c
@@ -491,6 +491,10 @@ int topo_node_sqlite_channel_delete(sqlite3* db, const char* channel_id) {
     sqlite3_exec(db, sql, NULL, NULL, NULL);
     snprintf(sql, sizeof(sql), "DROP TABLE IF EXISTS \"%s\"", msg_full);
     sqlite3_exec(db, sql, NULL, NULL, NULL);
+    snprintf(sql, sizeof(sql), "DROP TABLE IF EXISTS \"feedback_%s\"", msg_tbl);
+    if (sqlite3_exec(db, sql, NULL, NULL, NULL) != SQLITE_OK) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CHAT_SYNC, "feedback: delete channel=%s: %s", channel_id, sqlite3_errmsg(db)); return -1;
+    }
 
     /* 2. delete channels row (вместе с канальными privkey) */
     sqlite3_stmt* st = NULL;