diff --git a/.gitignore b/.gitignore
index bdd7f17..00d841b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,20 @@
 /.idea/
 /.obsidian/
+
+# Local administrator configuration and runtime data
+/wg-manager.conf
+/backups/
+/logs/
+/state/
+/bin/gum
+
+# Generated client material
+*.key
+*.pub
+*.psk
+*-client-*.conf
+*.conf.tmp
+
+# Isolated test output
+/tests/tmp/
+/tests/output/
diff --git a/PLANS.md b/PLANS.md
index 8388654..6ec1fb3 100644
--- a/PLANS.md
+++ b/PLANS.md
@@ -260,7 +260,7 @@ Allowed status values: `NOT STARTED`, `IN PROGRESS`, `BLOCKED`, `DONE`.
 
 | Milestone | Status | Outcome |
 |---|---|---|
-| M0 | NOT STARTED | Test harness and safe project skeleton |
+| M0 | DONE | Test harness and safe project skeleton |
 | M1 | NOT STARTED | Runtime foundation, CLI shell, and config loading |
 | M2 | NOT STARTED | WireGuard parser, client model, `status`, and `list` |
 | M3 | NOT STARTED | Locking, backups, atomic apply, and rollback engine |
@@ -1551,6 +1551,20 @@ Use this template:
 - Next milestone: My
 ```
 
+## 2026-10-11 — M0 — DONE
+
+- Implemented: strict source-safe `wg-manager.sh` help shell, placeholder configuration, runtime ignores, isolated pure-Bash test harness, minimal WireGuard fixture, and deny-by-default logged mocks for all planned external commands.
+- Coordinator: `gpt-5.6-sol` (`high`)
+- Subagents: `milestone_worker` / `milestone_repairer`, `gpt-5.6-luna` (`medium`)
+- Repair cycles: 2
+- Sol review: replaced a tautological host-path check with a recursive pure-Bash guard; made mocks deny empty calls unless explicitly authorized and assert exact invocation logs; removed an unused production path variable, added a narrow ShellCheck source directive, and cleared unintended index staging.
+- Verification: `bash -n wg-manager.sh`, `bash -n tests/run.sh`, `bash -n tests/helpers.sh`, `bash -n tests/mocks/bin/*`, `bash tests/run.sh`, `./wg-manager.sh help`, `(cd /tmp && /home/sasa/share/bash/wireguard-scripts/wg-manager.sh help)`, `git diff --check`, `git diff --no-index --check /dev/null <new-file>`, `git status --short`
+- Result: all required checks passed; 13 test assertions passed; unknown commands and extra arguments returned status 64; executable modes and isolated mock behavior were verified. Optional `shellcheck wg-manager.sh tests/run.sh tests/helpers.sh tests/mocks/bin/*` was `SKIP` because ShellCheck is unavailable.
+- Decisions: none
+- Known limitations: real WireGuard, networking, service, firewall, route, sysctl, journal, and deployment-server checks were not run; M0 verification is fixture- and mock-based as required.
+- Suggested commit message: `test: add isolated Bash test harness and project skeleton`
+- Next milestone: M1
+
 # 8. Final completion rule
 
 The MVP is complete only when:
diff --git a/tests/fixtures/wg0.conf b/tests/fixtures/wg0.conf
new file mode 100644
index 0000000..bff2177
--- /dev/null
+++ b/tests/fixtures/wg0.conf
@@ -0,0 +1,9 @@
+[Interface]
+Address = 192.0.2.1/24
+ListenPort = 51820
+PrivateKey = AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+
+[Peer]
+# Non-secret fixture placeholder; not used against a live host.
+PublicKey = BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB=
+AllowedIPs = 192.0.2.2/32
diff --git a/tests/helpers.sh b/tests/helpers.sh
new file mode 100755
index 0000000..5ebc672
--- /dev/null
+++ b/tests/helpers.sh
@@ -0,0 +1,97 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+umask 077
+
+readonly HELPERS_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+readonly PROJECT_DIR="$(cd -- "${HELPERS_DIR}/.." && pwd)"
+TEST_ROOT=''
+TEST_MOCK_LOG=''
+TEST_FAILURES=0
+TEST_ASSERTIONS=0
+
+setup_test_environment() {
+  TEST_ROOT="$(mktemp -d "${TMPDIR:-/tmp}/wg-manager-tests.XXXXXX")"
+  TEST_MOCK_LOG="${TEST_ROOT}/mock-invocations.log"
+  : >"$TEST_MOCK_LOG"
+  chmod 700 "$TEST_ROOT"
+  cp -- "${PROJECT_DIR}/tests/fixtures/wg0.conf" "${TEST_ROOT}/wg0.conf"
+  export TEST_ROOT TEST_MOCK_LOG
+  export PATH="${PROJECT_DIR}/tests/mocks/bin:${PATH:-}"
+  trap cleanup_test_environment EXIT INT TERM
+}
+
+cleanup_test_environment() {
+  local status=$?
+  trap - EXIT INT TERM
+  if [[ -n "$TEST_ROOT" && -d "$TEST_ROOT" ]]; then
+    rm -rf -- "$TEST_ROOT"
+  fi
+  return "$status"
+}
+
+begin_test() {
+  printf 'TEST %s\n' "$1"
+}
+
+record_failure() {
+  printf '  FAIL: %s\n' "$1" >&2
+  ((TEST_FAILURES += 1))
+}
+
+assert_equal() {
+  local expected=$1 actual=$2 message=${3:-значения равны}
+  ((TEST_ASSERTIONS += 1))
+  if [[ "$expected" != "$actual" ]]; then
+    record_failure "${message}: ожидалось [${expected}], получено [${actual}]"
+  fi
+}
+
+assert_status() {
+  local expected=$1 actual=$2 message=${3:-код завершения}
+  assert_equal "$expected" "$actual" "$message"
+}
+
+assert_contains() {
+  local needle=$1 haystack=$2 message=${3:-строка содержит ожидаемый текст}
+  ((TEST_ASSERTIONS += 1))
+  if [[ "$haystack" != *"$needle"* ]]; then
+    record_failure "${message}: не найдено [${needle}]"
+  fi
+}
+
+assert_file_exists() {
+  local path=$1 message=${2:-файл существует}
+  ((TEST_ASSERTIONS += 1))
+  if [[ ! -e "$path" ]]; then
+    record_failure "${message}: отсутствует [${path}]"
+  fi
+}
+
+assert_file_mode() {
+  local expected=$1 path=$2 actual message
+  actual=$(stat -c '%a' -- "$path")
+  message=${3:-режим файла}
+  assert_equal "$expected" "$actual" "$message"
+}
+
+assert_success() {
+  local status=$1 message=${2:-команда успешна}
+  assert_status 0 "$status" "$message"
+}
+
+assert_failure() {
+  local status=$1 message=${2:-команда завершилась с ошибкой}
+  ((TEST_ASSERTIONS += 1))
+  if (( status == 0 )); then
+    record_failure "$message: ожидался ненулевой код"
+  fi
+}
+
+finish_tests() {
+  if (( TEST_FAILURES == 0 )); then
+    printf 'PASS: %d проверок\n' "$TEST_ASSERTIONS"
+    return 0
+  fi
+  printf 'FAIL: %d ошибок из %d проверок\n' "$TEST_FAILURES" "$TEST_ASSERTIONS" >&2
+  return 1
+}
diff --git a/tests/mocks/bin/gum b/tests/mocks/bin/gum
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/gum
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/ip b/tests/mocks/bin/ip
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/ip
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/iptables b/tests/mocks/bin/iptables
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/iptables
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/journalctl b/tests/mocks/bin/journalctl
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/journalctl
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/nft b/tests/mocks/bin/nft
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/nft
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/qrencode b/tests/mocks/bin/qrencode
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/qrencode
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/ss b/tests/mocks/bin/ss
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/ss
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/sysctl b/tests/mocks/bin/sysctl
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/sysctl
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/systemctl b/tests/mocks/bin/systemctl
new file mode 100755
index 0000000..5c9ca66
--- /dev/null
+++ b/tests/mocks/bin/systemctl
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"; for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done; printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/wg b/tests/mocks/bin/wg
new file mode 100755
index 0000000..8ca9618
--- /dev/null
+++ b/tests/mocks/bin/wg
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"
+for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done
+printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/mocks/bin/wg-quick b/tests/mocks/bin/wg-quick
new file mode 100755
index 0000000..8ca9618
--- /dev/null
+++ b/tests/mocks/bin/wg-quick
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+command_name=${0##*/}
+: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
+allow_empty=${MOCK_ALLOW_EMPTY_INVOCATION:-}
+printf '%q' "$command_name" >>"$TEST_MOCK_LOG"
+for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done
+printf '\n' >>"$TEST_MOCK_LOG"
+if [[ -n "$allow_empty" && "$allow_empty" != "$command_name" ]]; then
+  printf 'Unexpected mock invocation: %s does not allow empty calls for %s\n' "$command_name" "$allow_empty" >&2
+  exit 99
+fi
+if [[ $# == 0 && "$allow_empty" == "$command_name" ]]; then
+  exit 0
+fi
+printf 'Unexpected mock invocation: %s received arguments\n' "$command_name" >&2
+exit 99
diff --git a/tests/run.sh b/tests/run.sh
new file mode 100755
index 0000000..da65193
--- /dev/null
+++ b/tests/run.sh
@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+umask 077
+
+readonly TESTS_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=helpers.sh
+source "${TESTS_DIR}/helpers.sh"
+
+setup_test_environment
+
+begin_test 'sourcing entry point does not execute main'
+source_output=$(bash -c 'source "$1"; printf sourced' _ "${PROJECT_DIR}/wg-manager.sh")
+assert_equal sourced "$source_output" 'безопасная загрузка'
+
+begin_test 'help succeeds without root or dependencies'
+set +e
+help_output=$("${PROJECT_DIR}/wg-manager.sh" help 2>&1)
+help_status=$?
+set -e
+assert_success "$help_status" 'команда help'
+assert_contains 'Использование:' "$help_output" 'справка'
+
+begin_test 'unknown command fails'
+set +e
+unknown_output=$("${PROJECT_DIR}/wg-manager.sh" unknown 2>&1)
+unknown_status=$?
+set -e
+assert_failure "$unknown_status" 'неизвестная команда'
+assert_contains 'неизвестная команда' "$unknown_output" 'сообщение об ошибке'
+
+begin_test 'help works outside project directory'
+set +e
+outside_output=$(cd /tmp && "${PROJECT_DIR}/wg-manager.sh" help 2>&1)
+outside_status=$?
+set -e
+assert_success "$outside_status" 'запуск из /tmp'
+assert_contains 'Использование:' "$outside_output" 'справка из /tmp'
+
+begin_test 'mock guard accepts only explicitly supported empty invocation'
+set +e
+MOCK_ALLOW_EMPTY_INVOCATION=wg wg
+expected_mock_status=$?
+wg
+unapproved_empty_status=$?
+wg unexpected
+unexpected_mock_status=$?
+set -e
+assert_success "$expected_mock_status" 'разрешённый вызов мока'
+assert_failure "$unapproved_empty_status" 'неразрешённый пустой вызов мока'
+assert_failure "$unexpected_mock_status" 'неожиданный вызов мока'
+expected_mock_log=$'wg\nwg\nwg unexpected\n'
+actual_mock_log=$(<"$TEST_MOCK_LOG")
+actual_mock_log+=$'\n'
+assert_equal "$expected_mock_log" "$actual_mock_log" 'точный журнал вызовов мока'
+
+begin_test 'test writes stay below isolated root'
+assert_file_exists "${TEST_ROOT}/wg0.conf" 'копия фикстуры'
+assert_equal "$TEST_ROOT" "${TEST_MOCK_LOG%/*}" 'журнал находится в тестовом корне'
+
+scan_test_sources_for_host_path() {
+  local forbidden_path='/etc'
+  forbidden_path+='/wireguard'
+
+  scan_path() {
+    local path line
+    for path in "$1"/*; do
+      if [[ -d "$path" ]]; then
+        scan_path "$path"
+      elif [[ -f "$path" ]]; then
+        while IFS= read -r line || [[ -n "$line" ]]; do
+          if [[ "$line" == *"$forbidden_path"* ]]; then
+            record_failure "тестовый файл содержит запрещённый путь: ${path}"
+            return
+          fi
+        done <"$path"
+      fi
+    done
+  }
+
+  scan_path "$TESTS_DIR"
+}
+
+scan_test_sources_for_host_path
+
+finish_tests
diff --git a/wg-manager.conf.example b/wg-manager.conf.example
new file mode 100644
index 0000000..0eb5664
--- /dev/null
+++ b/wg-manager.conf.example
@@ -0,0 +1,19 @@
+# Safe example configuration. Copy to wg-manager.conf and review before use.
+WG_INTERFACE="wg0"
+WG_CONF="/etc/wireguard/wg0.conf"
+CLIENT_DIR="/etc/wireguard/clients"
+
+SERVER_ENDPOINT="vpn.example.invalid"
+SERVER_PORT="51820"
+SERVER_VPN_IP="192.0.2.1"
+CLIENT_DNS="192.0.2.53"
+
+VPN_SUBNET_PREFIX="192.0.2"
+START_HOST="2"
+END_HOST="254"
+
+USE_IPV6="0"
+IPV6_PREFIX="2001:db8:ffff::"
+
+DEFAULT_CLIENT_MODE="full-tunnel"
+RECENT_HANDSHAKE_SECONDS="180"
diff --git a/wg-manager.sh b/wg-manager.sh
new file mode 100755
index 0000000..4a180eb
--- /dev/null
+++ b/wg-manager.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+umask 077
+
+print_usage() {
+  cat <<'USAGE'
+Использование:
+  wg-manager.sh help
+
+Команды WireGuard Manager будут добавлены в следующих версиях.
+USAGE
+}
+
+main() {
+  if (( $# != 1 )); then
+    printf 'Ошибка: ожидается одна команда.\n' >&2
+    print_usage >&2
+    return 64
+  fi
+
+  case "$1" in
+    help)
+      print_usage
+      ;;
+    *)
+      printf 'Ошибка: неизвестная команда: %s\n' "$1" >&2
+      print_usage >&2
+      return 64
+      ;;
+  esac
+}
+
+if [[ "${BASH_SOURCE[0]}" == "$0" ]]; then
+  main "$@"
+fi