fix(onboarding): no crash on text input, Claude Code default, explanations

Three issues a real curl|bash user hit:

1. CRASH: typing a word (e.g. "claude") at any menu → $((ans-1)) treats it as a
   variable in bash arithmetic → "unbound variable" under set -u → install dies.
   Added _onb_read_choice (numeric+range validation, re-prompt) for all 4 menus.

2. No Claude under subscription: the kit installs into Claude Code yet the wizard
   offered only OpenAI Codex under subscription. Added claude-code provider
   (bumped kei-registries submodule c559065→b904993) + made subscription the
   default transport and claude-code the default provider — Enter,Enter,Enter
   lands on Claude Code (no API key).

3. install died at line 178 for any no-key provider (claude-code/codex/local):
   onboarding_run ended on a `&&` that is false when there are no auth keys →
   returned 1 → set -e aborted. Added explicit `return 0`.

Plus per-step explanations (en+ru) and auto-select when a step has one option.
Verified piped-under-pty: Enter-defaults → Claude Code, junk input → re-prompt
(0 crashes), full install completes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

_blocks/registries

@@ -1 +1 @@
-Subproject commit c5590658ee636398c512ce2b25d8aedb3212a9b6
+Subproject commit b90499311ed09cbf88ced93aaa9d890dcf861fac

install/i18n/en.sh

@@ -19,7 +19,7 @@ STR_TR_AZURE_OPENAI="Azure OpenAI (deployment+key)"
 STR_TR_GOOGLE_VERTEX="Google Vertex AI (GCP)"
 STR_TR_LOCAL="Local (Ollama/MLX/LMStudio)"
 STR_TR_PROXY="Proxy (LiteLLM/OpenRouter)"
-STR_TR_SUBSCRIPTION="OAuth subscription (ChatGPT)"
+STR_TR_SUBSCRIPTION="Subscription login (Claude Code / ChatGPT — no API key)"
 
 # Auth collection
 STR_AUTH_INTRO="Auth for"
@@ -40,3 +40,9 @@ STR_MENU_CONFIRM="Confirm selection?"
 # Preflight warnings
 STR_PREFLIGHT_FAILED="Preflight failed — provider may not work."
 STR_PREFLIGHT_CONTINUE="Continue anyway? [y/N]"
+
+# Wizard explanations + input validation
+STR_PICK_INVALID="please type one of the numbers shown"
+STR_EXPLAIN_TRANSPORT="How the agents reach the AI. subscription = log in with your plan, no API key (Claude Code is option 1); direct-api = your own API key. Press Enter for the default."
+STR_EXPLAIN_PROVIDER="Which AI service. Option 1 is the recommended default — press Enter."
+STR_EXPLAIN_MODEL="Default model the agents use. Option 1 is the recommended default — press Enter."

install/i18n/ru.sh

@@ -19,7 +19,7 @@ STR_TR_AZURE_OPENAI="Azure OpenAI (deployment+ключ)"
 STR_TR_GOOGLE_VERTEX="Google Vertex AI (GCP)"
 STR_TR_LOCAL="Локально (Ollama/MLX/LMStudio)"
 STR_TR_PROXY="Прокси (LiteLLM/OpenRouter)"
-STR_TR_SUBSCRIPTION="OAuth-подписка (ChatGPT)"
+STR_TR_SUBSCRIPTION="Вход по подписке (Claude Code / ChatGPT — без API-ключа)"
 
 # Сбор ключей
 STR_AUTH_INTRO="Аутентификация для"
@@ -40,3 +40,9 @@ STR_MENU_CONFIRM="Подтвердить выбор?"
 # Preflight-предупреждения
 STR_PREFLIGHT_FAILED="Preflight упал — провайдер может не работать."
 STR_PREFLIGHT_CONTINUE="Продолжить всё равно? [y/N]"
+
+# Пояснения мастера + валидация ввода
+STR_PICK_INVALID="введите один из показанных номеров"
+STR_EXPLAIN_TRANSPORT="Как агенты обращаются к ИИ. subscription = вход по подписке, без API-ключа (Claude Code — вариант 1); direct-api = свой API-ключ. Нажми Enter для варианта по умолчанию."
+STR_EXPLAIN_PROVIDER="Какой ИИ-сервис. Вариант 1 — рекомендуемый по умолчанию, нажми Enter."
+STR_EXPLAIN_MODEL="Модель, которую используют агенты. Вариант 1 — рекомендуемый по умолчанию, нажми Enter."

install/lib-onboarding-registry.sh

@@ -45,12 +45,20 @@ onboarding_fallback_providers() {
   printf "lmstudio-local\tlocal\tLM Studio (local)\t_\n"
   printf "litellm-proxy\tproxy\tLiteLLM proxy (keisei.app)\tKEI_LITELLM_KEY\n"
   printf "openrouter\tproxy\tOpenRouter\tOPENROUTER_API_KEY\n"
+  printf "claude-code\tsubscription\tClaude Code (subscription — your claude CLI, no API key)\t_\n"
   printf "codex\tsubscription\tOpenAI Codex (ChatGPT OAuth)\t_\n"
 }
 
 # Уникальные транспорты — для первого экрана выбора.
+# Claude-Code-native kit → выводим subscription + direct-api ПЕРВЫМИ, чтобы
+# рекомендованный путь (Claude Code, опция 1) был дефолтом. Остальные следом.
 onboarding_list_transports() {
-  onboarding_list_providers | awk -F'\t' '{print $2}' | sort -u
+  local all; all="$(onboarding_list_providers | awk -F'\t' '{print $2}' | sort -u)"
+  local t
+  for t in subscription direct-api; do
+    printf '%s\n' "$all" | grep -qx "$t" && echo "$t"
+  done
+  printf '%s\n' "$all" | grep -vxE 'subscription|direct-api' || true
 }
 
 # Провайдеры внутри транспорта.

install/lib-onboarding-ui.sh

@@ -12,6 +12,23 @@
 #   - lib-i18n.sh: STR_* словарь + i18n_available_languages + i18n_load_lang
 #   - lib-onboarding-registry.sh: списки провайдеров/моделей
 
+# Read a validated 1-based menu choice. Non-numeric or out-of-range input is
+# rejected with a re-prompt instead of crashing: bash arithmetic $((ans-1))
+# treats a non-numeric "ans" (e.g. the user typing "claude") as a variable name
+# → "unbound variable" under `set -u`. $1=option count, $2=prompt.
+# Echoes a number in [1,$1] on stdout; prompts/warnings go to stderr.
+_onb_read_choice() {
+  local max="$1" prompt="$2" ans
+  while true; do
+    read -r -p "$prompt" ans
+    ans="${ans:-1}"
+    if [[ "$ans" =~ ^[0-9]+$ ]] && [ "$ans" -ge 1 ] && [ "$ans" -le "$max" ]; then
+      printf '%s' "$ans"; return 0
+    fi
+    printf '  ⚠ %s\n' "${STR_PICK_INVALID:-please enter a number from 1 to $max}" >&2
+  done
+}
+
 onboarding_pick_language() {
   local langs
   langs="$(i18n_available_languages 2>/dev/null)"
@@ -43,8 +60,7 @@ onboarding_pick_language() {
       printf "  %2d) %s — %s\n" "$i" "$code" "$name" >&2
       i=$((i+1))
     done <<< "$langs"
-    read -r -p "[1-${#codes[@]}, default 1=en]: " ans
-    ans="${ans:-1}"
+    ans="$(_onb_read_choice "${#codes[@]}" "[1-${#codes[@]}, default 1=en]: ")"
     ONBOARDING_LANG="${codes[$((ans-1))]:-en}"
   fi
   command -v i18n_load_lang >/dev/null 2>&1 && i18n_load_lang "$ONBOARDING_LANG"
@@ -76,6 +92,7 @@ onboarding_pick_transport() {
   else
     echo "" >&2
     echo "$prompt" >&2
+    echo "  ${STR_EXPLAIN_TRANSPORT:-How the agents reach the AI. subscription = log in with your plan (no API key); direct-api = your own API key. Default is fine for most.}" >&2
     local i=1
     declare -a opts=()
     while IFS= read -r tr; do
@@ -83,8 +100,7 @@ onboarding_pick_transport() {
       echo "  $i) $tr" >&2
       i=$((i+1))
     done <<< "$transports"
-    read -r -p "[1-${#opts[@]}, default 1]: " ans
-    ans="${ans:-1}"
+    ans="$(_onb_read_choice "${#opts[@]}" "[1-${#opts[@]}, default 1]: ")"
     ONBOARDING_TRANSPORT="${opts[$((ans-1))]:-direct-api}"
   fi
 }
@@ -111,6 +127,7 @@ onboarding_pick_provider() {
   else
     echo "" >&2
     echo "${STR_PICK_PROVIDER:-Provider within} $ONBOARDING_TRANSPORT:" >&2
+    echo "  ${STR_EXPLAIN_PROVIDER:-Which AI service. Option 1 is the recommended default.}" >&2
     declare -a ids=()
     local i=1
     while IFS=$'\t' read -r id dn ae; do
@@ -118,8 +135,7 @@ onboarding_pick_provider() {
       echo "  $i) $id — $dn" >&2
       i=$((i+1))
     done <<< "$rows"
-    read -r -p "[1-${#ids[@]}, default 1]: " ans
-    ans="${ans:-1}"
+    ans="$(_onb_read_choice "${#ids[@]}" "[1-${#ids[@]}, default 1]: ")"
     ONBOARDING_PROVIDER="${ids[$((ans-1))]:-${ids[0]}}"
   fi
 }
@@ -135,6 +151,12 @@ onboarding_pick_model() {
   local rows; rows=$(onboarding_models_for_provider "$lookup")
   [ -z "$rows" ] && rows=$(printf "claude-sonnet-4-6\tClaude Sonnet 4.6 (fallback)\n")
 
+  # Single model → auto-select, no dead-end prompt (mirrors provider count==1).
+  if [ "$(printf '%s\n' "$rows" | grep -c .)" = "1" ]; then
+    ONBOARDING_MODEL=$(printf '%s\n' "$rows" | head -1 | awk -F'\t' '{print $1}')
+    return
+  fi
+
   if command -v whiptail >/dev/null 2>&1; then
     local args=()
     while IFS=$'\t' read -r id dn; do
@@ -146,6 +168,7 @@ onboarding_pick_model() {
   else
     echo "" >&2
     echo "${STR_PICK_MODEL:-Models for} $lookup:" >&2
+    echo "  ${STR_EXPLAIN_MODEL:-Default model the agents use. Option 1 is the recommended default.}" >&2
     declare -a ids=()
     local i=1
     while IFS=$'\t' read -r id dn; do
@@ -153,8 +176,7 @@ onboarding_pick_model() {
       echo "  $i) $id — $dn" >&2
       i=$((i+1))
     done <<< "$rows"
-    read -r -p "[1-${#ids[@]}, default 1]: " ans
-    ans="${ans:-1}"
+    ans="$(_onb_read_choice "${#ids[@]}" "[1-${#ids[@]}, default 1]: ")"
     ONBOARDING_MODEL="${ids[$((ans-1))]:-${ids[0]}}"
   fi
 }

install/lib-onboarding.sh

@@ -95,4 +95,9 @@ onboarding_run() {
     say "  ${STR_DONE_CONFIG:-config:} $ONBOARDING_CONFIG"
     [ "${#ONBOARDING_AUTH_ENV_KEYS[@]}" -gt 0 ] && say "  ${STR_DONE_SECRETS:-secrets:} $SECRETS_ENV (chmod 600)"
   fi
+  # MUST end on success: the last statement above is a short-circuit `&&` that
+  # evaluates false when the provider has no auth keys (claude-code / codex /
+  # local) → function would return 1 → `set -e` aborts the whole install at the
+  # onboarding_run call. Subscription/local providers are exactly the no-key case.
+  return 0
 }