diff --git a/tachyon/files/usr/lib/diagnostics/runtime.uc b/tachyon/files/usr/lib/diagnostics/runtime.uc
index de2f8683..c624dfb4 100644
--- a/tachyon/files/usr/lib/diagnostics/runtime.uc
+++ b/tachyon/files/usr/lib/diagnostics/runtime.uc
@@ -2777,6 +2777,25 @@ function run_doctor_checks_impl(repair) {
         }
     }
 
+    // 6c. WireGuard/AWG tunnel health from recent core logs. A userspace
+    // wireguard outbound whose peer never answers produces a steady stream
+    // of "operation timed out" connection errors - the config is applied
+    // correctly, the failure is outside Tachyon (server down, ISP filtering
+    // the UDP endpoint). Surfacing this as its own check stops the classic
+    // "Tachyon broke my AWG" misattribution.
+    if (pid != "") {
+        let wg_log = lc(command_capture("logread -l 400 2>/dev/null | grep -i 'outbound/wireguard' | tail -n 8").output);
+        let wg_failures = index(wg_log, "operation timed out") >= 0 ||
+            (index(wg_log, "handshake") >= 0 && index(wg_log, "timeout") >= 0);
+        if (wg_log != "" && wg_failures) {
+            issues++;
+            doc_check("⚠️", "WireGuard/AWG tunnel", "peer not answering through core",
+                "→ ядро не получает ответов от пира (запросы уходят, ответы нет): проверьте доступность AWG/WARP-сервера и UDP-порта у провайдера. Конфигурация секции применена корректно — проблема вне Tachyon");
+        } else if (wg_log != "") {
+            doc_check("✅", "WireGuard/AWG tunnel", "no recent failures in core log", "");
+        }
+    }
+
     // 7. Free RAM Check
     let free_mb = -1;
     let mem_info = fs.readfile("/proc/meminfo") || "";
diff --git a/tests/doctor_wg_tunnel.sh b/tests/doctor_wg_tunnel.sh
new file mode 100644
index 00000000..7d02f183
--- /dev/null
+++ b/tests/doctor_wg_tunnel.sh
@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+RT="$ROOT_DIR/tachyon/files/usr/lib/diagnostics/runtime.uc"
+
+fail() {
+  printf 'FAIL: %s\n' "$1" >&2
+  exit 1
+}
+
+[ -f "$RT" ] || fail "runtime.uc not found"
+
+# Doctor must attribute dead WireGuard/AWG tunnels to the outside world based
+# on core log evidence, instead of leaving users to blame Tachyon for a peer
+# that never answers (issues #39/#42 complaint pattern).
+grep -Fq 'outbound/wireguard' "$RT" ||
+  fail "doctor must scan core logs for wireguard outbound failures"
+grep -Fq '"WireGuard/AWG tunnel"' "$RT" ||
+  fail "doctor must report a dedicated WireGuard/AWG tunnel check"
+grep -Fq 'проблема вне Tachyon' "$RT" ||
+  fail "the verdict must state the failure is outside Tachyon"
+
+# The check only speaks when there is evidence: no wireguard lines in the
+# core log means no check line at all (no noise for non-AWG users).
+grep -Fq 'if (wg_log != "" && wg_failures) {' "$RT" ||
+  fail "failure verdict must require actual log evidence"
+grep -Fq '} else if (wg_log != "") {' "$RT" ||
+  fail "success line must be skipped entirely when no wireguard traffic exists"
+
+printf 'doctor wireguard tunnel checks passed\n'