Fix set -e bug causing silent exit after valid input

- Replace all `[[ condition ]] && die` with `if/fi` — the && pattern
  exits silently when the condition is false under set -e
- Removed -e from set flags (kept -uo pipefail), all error paths are
  now explicit
- Declare `input` as local in ask/ask_yn/ask_choice to prevent leakage
- Use `read -r input || true` to handle EOF safely
- Fix ask_choice arithmetic to avoid (()) triggering exit on false

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/prereqs.sh

@@ -41,7 +41,7 @@ ensure_git() {
     fi
     warn "git not found."
     ask_yn _install "Install git now?" "y"
-    [[ "$_install" != "y" ]] && die "git is required."
+    if [[ "$_install" != "y" ]]; then die "git is required."; fi
     install_pkg git
     command -v git &>/dev/null || die "git installation failed."
     success "git installed: $(git --version)"
@@ -69,7 +69,8 @@ ensure_container_runtime() {
         "podman (recommended)" \
         "docker"
 
-    case "$_runtime" in
+    local runtime_choice="$_runtime"
+    case "$runtime_choice" in
         podman*)
             _install_podman
             CONTAINER_CMD="podman"

lib/utils.sh

@@ -18,26 +18,27 @@ header()  { echo -e "\n${BOLD}${CYAN}━━━  $*  ━━━${RESET}\n"; }
 # ask VAR "prompt" "default"
 ask() {
     local var="$1" prompt="$2" default="$3"
+    local input
     if [[ -n "$default" ]]; then
         echo -ne "${BOLD}${prompt}${RESET} ${CYAN}[${default}]${RESET}: "
     else
         echo -ne "${BOLD}${prompt}${RESET}: "
     fi
-    read -r input
+    read -r input || true
     if [[ -z "$input" && -n "$default" ]]; then
-        eval "$var=\"$default\""
+        eval "$var=\"\$default\""
     else
-        eval "$var=\"$input\""
+        eval "$var=\"\$input\""
     fi
 }
 
 # ask_yn VAR "prompt" "y|n"
 ask_yn() {
     local var="$1" prompt="$2" default="$3"
-    local options
+    local input options
     if [[ "$default" == "y" ]]; then options="Y/n"; else options="y/N"; fi
     echo -ne "${BOLD}${prompt}${RESET} ${CYAN}[${options}]${RESET}: "
-    read -r input
+    read -r input || true
     input="${input:-$default}"
     if [[ "$input" =~ ^[Yy]$ ]]; then
         eval "$var=y"
@@ -50,18 +51,20 @@ ask_yn() {
 ask_choice() {
     local var="$1" prompt="$2"; shift 2
     local options=("$@")
+    local input idx
     echo -e "${BOLD}${prompt}${RESET}"
     for i in "${!options[@]}"; do
         echo -e "  ${CYAN}$((i+1))${RESET}) ${options[$i]}"
     done
     echo -ne "Choice ${CYAN}[1]${RESET}: "
-    read -r input
+    read -r input || true
     input="${input:-1}"
     if [[ "$input" =~ ^[0-9]+$ ]] && (( input >= 1 && input <= ${#options[@]} )); then
-        eval "$var=\"${options[$((input-1))]}\""
+        idx=$(( input - 1 ))
     else
-        eval "$var=\"${options[0]}\""
+        idx=0
     fi
+    eval "$var=\"\${options[$idx]}\""
 }
 
 require_cmd() {

wizard.sh

@@ -2,7 +2,7 @@
 # ╔══════════════════════════════════════════════════════════════════╗
 # ║            Context Studio Wizard — Project Setup                ║
 # ╚══════════════════════════════════════════════════════════════════╝
-set -euo pipefail
+set -uo pipefail
 
 WIZARD_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
@@ -17,17 +17,17 @@ collect_project_info() {
     header "Project Details"
 
     ask PROJECT_NAME "Project name" ""
-    [[ -z "$PROJECT_NAME" ]] && die "Project name is required."
+    if [[ -z "$PROJECT_NAME" ]]; then die "Project name is required."; fi
 
     local default_dir="$HOME/projects/$(slugify "$PROJECT_NAME")"
     ask PROJECT_DIR "Project location" "$default_dir"
-    [[ -z "$PROJECT_DIR" ]] && die "Project location is required."
+    if [[ -z "$PROJECT_DIR" ]]; then die "Project location is required."; fi
     PROJECT_DIR="${PROJECT_DIR/#\~/$HOME}"
 
     if [[ -e "$PROJECT_DIR" ]]; then
         warn "Directory already exists: $PROJECT_DIR"
         ask_yn _continue "Continue anyway?" "n"
-        [[ "$_continue" != "y" ]] && die "Aborted."
+        if [[ "$_continue" != "y" ]]; then die "Aborted."; fi
     fi
 }
 
@@ -41,14 +41,13 @@ collect_workflow_info() {
 
     if [[ "$WORKFLOW_SOURCE" == "Clone from existing repo" ]]; then
         ask WORKFLOW_REPO "Workflow repo URL" ""
-        [[ -z "$WORKFLOW_REPO" ]] && die "Repo URL is required."
+        if [[ -z "$WORKFLOW_REPO" ]]; then die "Repo URL is required."; fi
     else
         ask PROJECT_DESC "Project description" "A software project"
         ask TECH_STACK   "Tech stack (e.g. Node.js, Rust, Python)" "Node.js"
         ask_choice AGENT_PRESET "Agent preset" \
             "minimal (5 agents: coordinator, 2 coders, researcher, tester)" \
             "standard (9 agents: 2 coordinators, 3 coders, 2 researchers, tester, reviewer)"
-        # Normalize to short key
         case "$AGENT_PRESET" in
             minimal*) AGENT_PRESET="minimal" ;;
             *)         AGENT_PRESET="standard" ;;
@@ -63,15 +62,15 @@ confirm_summary() {
     echo -e "  ${BOLD}Location${RESET}       : $PROJECT_DIR"
     echo -e "  ${BOLD}Core${RESET}           : $CS_CORE_DIR"
     if [[ "${WORKFLOW_SOURCE:-}" == "Clone from existing repo" ]]; then
-        echo -e "  ${BOLD}Workflow${RESET}       : clone $WORKFLOW_REPO"
+        echo -e "  ${BOLD}Workflow${RESET}       : clone ${WORKFLOW_REPO:-}"
     else
-        echo -e "  ${BOLD}Workflow${RESET}       : generate ($AGENT_PRESET preset)"
+        echo -e "  ${BOLD}Workflow${RESET}       : generate (${AGENT_PRESET:-minimal} preset)"
         echo -e "  ${BOLD}Description${RESET}    : ${PROJECT_DESC:-}"
         echo -e "  ${BOLD}Tech stack${RESET}     : ${TECH_STACK:-}"
     fi
     echo ""
     ask_yn _ok "Create project?" "y"
-    [[ "$_ok" != "y" ]] && die "Aborted."
+    if [[ "$_ok" != "y" ]]; then die "Aborted."; fi
 }
 
 # ── Build ──────────────────────────────────────────────────────────────────
@@ -82,15 +81,14 @@ build_project() {
     create_devcontainer      "$PROJECT_DIR" "$PROJECT_NAME"
 
     if [[ "${WORKFLOW_SOURCE:-}" == "Clone from existing repo" ]]; then
-        clone_workflow "$PROJECT_DIR" "$WORKFLOW_REPO"
+        clone_workflow "$PROJECT_DIR" "${WORKFLOW_REPO:-}"
     else
         generate_workflow "$PROJECT_DIR" "$PROJECT_NAME" \
             "${PROJECT_DESC:-A software project}" \
             "${TECH_STACK:-Node.js}" \
-            "$AGENT_PRESET"
+            "${AGENT_PRESET:-minimal}"
     fi
 
-    # Init git repo
     git -C "$PROJECT_DIR" init -q
     git -C "$PROJECT_DIR" add .
     git -C "$PROJECT_DIR" commit -q -m "Initial project setup via Context Studio Wizard"