feat: enable-all command (symmetric to disable-all)

Bulk-enable every parked agent into selected target(s) from THAT
target's parked source (format-aware). Idempotent — skips already-active.

usage: opc-agents enable-all [--target T] [-y|--yes]

bin/opc-agents

@@ -328,6 +328,51 @@ cmd_disable_all() {
   done
 }
 
+# enable every parked agent into selected target(s) — symmetric to disable-all
+# usage: cmd_enable_all [--target T] [-y|--yes]
+# Per-target: only reads from THAT target's parked source (format-aware).
+# Idempotent: skips agents already active.
+cmd_enable_all() {
+  parse_target_flag "$@"
+  set -- "${REMAINING_ARGS[@]}"
+  require_dirs
+  local force=0
+  if [ "${1:-}" = "-y" ] || [ "${1:-}" = "--yes" ]; then
+    force=1
+  fi
+  IFS=',' read -ra tgts <<< "$PARSED_TARGETS"
+  local -a pairs=()
+  local t pdir adir n
+  for t in "${tgts[@]}"; do
+    pdir=$(target_parked "$t") || continue
+    adir=$(target_active "$t") || continue
+    while IFS= read -r n; do
+      [ -z "$n" ] && continue
+      [ -f "$adir/$n.md" ] && continue   # already active
+      pairs+=("$t:$n")
+    done < <(agent_names_in "$pdir")
+  done
+  [ "${#pairs[@]}" -gt 0 ] || { echo "all parked agents already active in [${tgts[*]}]"; exit 0; }
+  echo "Will enable ${#pairs[@]} (target:agent) entries:"
+  printf '  %s\n' "${pairs[@]:0:20}"
+  [ "${#pairs[@]}" -gt 20 ] && echo "  ... and $((${#pairs[@]} - 20)) more"
+  if [ "$force" -ne 1 ]; then
+    printf "Proceed? [y/N] "
+    read -r ans </dev/tty || ans=""
+    case "$ans" in y|Y|yes|YES) ;; *) echo "cancelled"; exit 0 ;; esac
+  fi
+  local p enabled=0
+  for p in "${pairs[@]}"; do
+    t="${p%%:*}"; n="${p#*:}"
+    pdir=$(target_parked "$t"); adir=$(target_active "$t")
+    [ -f "$pdir/$n.md" ] || continue
+    [ -f "$adir/$n.md" ] && continue
+    cp "$pdir/$n.md" "$adir/$n.md"
+    enabled=$((enabled+1))
+  done
+  echo "enabled $enabled agent(s)."
+}
+
 # enable category (by prefix)
 cmd_enable_category() {
   require_dirs
@@ -633,7 +678,7 @@ usage() {
 opc-agents — multi-target agent manager (opencode + claude)
 
 Targets: opencode, claude (or "both"/"all"; default = opencode,claude)
-Use --target / -t with enable/disable/disable-all to scope the operation.
+Use --target / -t with enable/disable/enable-all/disable-all to scope the operation.
 
   status                      per-target counts (parked + active) + mode breakdown
   list {active|parked|all}    list agent names (active = opencode set)
@@ -641,6 +686,8 @@ Use --target / -t with enable/disable/disable-all to scope the operation.
   variants                    suffix-based variant counts (PARKED opencode)
   enable  [--target T] <name>             copy parked → active in selected targets
   disable [--target T] <name>             remove from active in selected targets
+  enable-all  [--target T] [-y|--yes]     enable every parked agent into selected targets
+                                          (idempotent — restore-from-archive helper)
   disable-all [--target T] [-y|--yes] [--keep-primary]
                                           disable every active agent across targets
   enable-category  <prefix>   fzf multi-pick within a base-persona prefix, then enable
@@ -682,6 +729,7 @@ main() {
     variants|vars)    cmd_variants "$@" ;;
     enable)           cmd_enable "$@" ;;
     disable)          cmd_disable "$@" ;;
+    enable-all)       cmd_enable_all "$@" ;;
     disable-all)      cmd_disable_all "$@" ;;
     enable-category|enable-cat)   cmd_enable_category "$@" ;;
     disable-category|disable-cat) cmd_disable_category "$@" ;;