feat(sandbox): VM library — pointer catalog + local build via /sbx vmlib

Add an installable-VM catalog that ships pointers only (no multi-GB images
in the repo). When a VM is chosen it is BUILT LOCALLY on the caller's own
machine — nothing is relayed to the room.

- scripts/vbox-library.json: 7-entry manifest (Windows 11, macOS Sonoma,
  Kali, Parrot, Ubuntu 24.04, Fedora 41, Debian 12) with download
  pointers, ostype, cpu/mem/disk, and build kind.
- scripts/vbox-library.sh: --list / --info / --plan / --install. Build
  kinds: iso (download/--iso + createvm + boot installer; EFI+TPM for
  Win11), cloudimg (delegate to vbox-new.sh, unattended), ova (import),
  manual (pointer-only, e.g. macOS per Apple licensing). Detect-first:
  --plan changes nothing, install refuses to clobber and rolls back
  half-built VMs, direct URLs fall back to the page + --iso <path>.
- sbx.rs: vbox_library()/library_vm()/vbox_library_install() loaders +
  running_vms() for live-state markers.
- app.rs: /sbx vmlib (catalog ✓installed/↓available), /sbx vmlib <id>
  (pointer/notes), /sbx vmlib <id> install [--iso path] (local build);
  /sbx vms now flags running VMs (▶). Registered in SBX_SUBCOMMANDS +
  usage.
- ui.rs: help entry for the VM library.

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

hh/scripts/vbox-library.json

@@ -0,0 +1,111 @@
+{
+  "_comment": "hack-house VirtualBox VM library. Pointers ONLY — no images are bundled in the repo (they are multi-GB). When a VM is chosen, it is built locally on the caller's own machine by scripts/vbox-library.sh. 'kind' decides how: iso = download installer ISO + create VM + boot the installer; cloudimg = delegate to vbox-new.sh (cloud-init, fully unattended); ova = download + VBoxManage import; manual = pointer-only (licence/availability prevents auto-build). Direct 'url' values are best-effort and version-pinned: when one 404s the script falls back to the 'page' and lets you supply a local file with --iso. Update versions here over time.",
+  "version": 1,
+  "vms": [
+    {
+      "id": "windows-11",
+      "name": "Windows 11",
+      "os": "Windows 11 x64",
+      "size": "~25 GB installed",
+      "kind": "iso",
+      "ostype": "Windows11_64",
+      "url": "",
+      "page": "https://www.microsoft.com/software-download/windows11",
+      "cpus": 4,
+      "mem_mb": 8192,
+      "disk_gb": 64,
+      "efi": true,
+      "tpm": "2.0",
+      "notes": "Microsoft serves the ISO behind a session-gated page, so there is no stable direct link. Download it from the page, then build locally with: /sbx vmlib windows-11 install --iso <path-to-Win11.iso>. The VM is created with EFI firmware + a TPM 2.0 device + Secure Boot so Setup accepts it."
+    },
+    {
+      "id": "macos-sonoma",
+      "name": "macOS Sonoma",
+      "os": "macOS 14 (Sonoma)",
+      "size": "~40 GB installed",
+      "kind": "manual",
+      "ostype": "MacOS_64",
+      "url": "",
+      "page": "https://github.com/kholia/OSX-KVM",
+      "cpus": 4,
+      "mem_mb": 8192,
+      "disk_gb": 80,
+      "notes": "Apple's licence permits macOS only on Apple-branded hardware, and the installer is not redistributable, so this cannot be auto-built. Follow the OSX-KVM project (or Docker-OSX / sosumi) on the page to assemble an image yourself, then import it with /sbx vbox <name>."
+    },
+    {
+      "id": "kali-linux",
+      "name": "Kali Linux",
+      "os": "Debian-based · pentest",
+      "size": "~4 GB",
+      "kind": "iso",
+      "ostype": "Debian_64",
+      "version": "2024.4",
+      "url": "https://cdimage.kali.org/kali-2024.4/kali-linux-2024.4-installer-amd64.iso",
+      "page": "https://www.kali.org/get-kali/#kali-installer-images",
+      "cpus": 2,
+      "mem_mb": 4096,
+      "disk_gb": 30,
+      "notes": "The flagship offensive-security distro. Default live creds kali/kali; the installer ISO sets your own during setup."
+    },
+    {
+      "id": "parrot-security",
+      "name": "Parrot Security OS",
+      "os": "Debian-based · pentest",
+      "size": "~5 GB",
+      "kind": "iso",
+      "ostype": "Debian_64",
+      "version": "6.2",
+      "url": "https://deb.parrot.sh/parrot/iso/6.2/Parrot-security-6.2_amd64.iso",
+      "page": "https://parrotsec.org/download/",
+      "cpus": 2,
+      "mem_mb": 4096,
+      "disk_gb": 30,
+      "notes": "Privacy/pentest distro, a lighter-weight alternative to Kali."
+    },
+    {
+      "id": "ubuntu-2404",
+      "name": "Ubuntu 24.04 LTS",
+      "os": "Ubuntu Server x64",
+      "size": "~2 GB base",
+      "kind": "cloudimg",
+      "ostype": "Ubuntu_64",
+      "version": "24.04",
+      "url": "https://cloud-images.ubuntu.com/releases/24.04/release/",
+      "page": "https://ubuntu.com/download/server",
+      "cpus": 2,
+      "mem_mb": 2048,
+      "disk_gb": 15,
+      "notes": "Fully unattended build via vbox-new.sh: a cloud-init seed installs the hack-house dev toolchain and creates a sudo login user on first boot. The only entry that comes up ready-to-use with no manual installer."
+    },
+    {
+      "id": "fedora-workstation",
+      "name": "Fedora Workstation",
+      "os": "Fedora · RPM",
+      "size": "~3 GB",
+      "kind": "iso",
+      "ostype": "Fedora_64",
+      "version": "41",
+      "url": "https://download.fedoraproject.org/pub/fedora/linux/releases/41/Workstation/x86_64/iso/Fedora-Workstation-Live-x86_64-41-1.4.iso",
+      "page": "https://fedoraproject.org/workstation/download",
+      "cpus": 2,
+      "mem_mb": 4096,
+      "disk_gb": 30,
+      "notes": "Cutting-edge GNOME workstation; live ISO, install to disk from the desktop."
+    },
+    {
+      "id": "debian-12",
+      "name": "Debian 12 (Bookworm)",
+      "os": "Debian · stable",
+      "size": "~1 GB (netinst)",
+      "kind": "iso",
+      "ostype": "Debian_64",
+      "version": "12",
+      "url": "https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-12.8.0-amd64-netinst.iso",
+      "page": "https://www.debian.org/distrib/",
+      "cpus": 2,
+      "mem_mb": 2048,
+      "disk_gb": 20,
+      "notes": "Rock-stable base server/desktop. Small netinst ISO pulls packages during install."
+    }
+  ]
+}

hh/scripts/vbox-library.sh

@@ -0,0 +1,267 @@
+#!/usr/bin/env bash
+# vbox-library.sh — browse + locally build VMs from the hack-house VM library.
+#
+# The repo ships ONLY pointers (scripts/vbox-library.json), never the multi-GB
+# images themselves. When you choose a VM it is built on YOUR own machine here:
+#   * cloudimg → hand off to vbox-new.sh (fully unattended cloud-init build)
+#   * iso      → download the installer ISO, create a VM, attach it, boot the
+#                installer (you finish setup in the VirtualBox window)
+#   * ova      → download the appliance and `VBoxManage import` it
+#   * manual   → pointer-only (licence/availability prevents an auto-build)
+#
+# Detect-first, never silent: --plan shows exactly what would be downloaded and
+# created and changes nothing; an install refuses to clobber an existing VM and
+# rolls a half-built one back. Direct URLs are best-effort + version-pinned: if
+# one 404s, you get the official page and can supply a local file with --iso.
+#
+# usage:
+#   ./vbox-library.sh --list                 # catalog (installed vs available)
+#   ./vbox-library.sh --info <id>            # one entry's details + how to get it
+#   ./vbox-library.sh --plan <id>            # show the build plan; change nothing
+#   ./vbox-library.sh --install <id> [--iso <path>] [--no-boot] [--yes]
+#
+# Deps: jq (read the manifest), VBoxManage; curl|wget for downloads; for cloudimg
+#       entries the deps of vbox-new.sh (qemu-img + a seed-ISO builder).
+set -uo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+MANIFEST="$SCRIPT_DIR/vbox-library.json"
+VBOX_NEW="$SCRIPT_DIR/vbox-new.sh"
+CACHE_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/hh/vbox-library"
+
+ACTION=""
+ID=""
+ISO_OVERRIDE=""
+DO_BOOT=1
+ASSUME_YES=0
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --list)              ACTION="list"; shift ;;
+        --info)              ACTION="info"; ID="${2:-}"; shift 2 ;;
+        --plan|--dry-run)    ACTION="plan"; ID="${2:-}"; shift 2 ;;
+        --install)           ACTION="install"; ID="${2:-}"; shift 2 ;;
+        --iso)               ISO_OVERRIDE="${2:-}"; shift 2 ;;
+        --iso=*)             ISO_OVERRIDE="${1#*=}"; shift ;;
+        --no-boot)           DO_BOOT=0; shift ;;
+        -y|--yes)            ASSUME_YES=1; shift ;;
+        -h|--help)           grep '^#' "$0" | sed 's/^# \{0,1\}//'; exit 0 ;;
+        *) echo "✖ unknown arg: $1" >&2; exit 2 ;;
+    esac
+done
+
+need() { command -v "$1" >/dev/null 2>&1; }
+need jq || { echo "✖ jq is required to read the VM library manifest (apt install jq)" >&2; exit 1; }
+[[ -f "$MANIFEST" ]] || { echo "✖ manifest not found: $MANIFEST" >&2; exit 1; }
+
+# A single jq query against one VM object, by id. Echoes the raw value ("" if null).
+q() { jq -r --arg id "$ID" --arg k "$1" '.vms[] | select(.id==$id) | .[$k] // ""' "$MANIFEST"; }
+vm_exists_in_manifest() { jq -e --arg id "$ID" '.vms[] | select(.id==$id)' "$MANIFEST" >/dev/null 2>&1; }
+# Is a VM with this display name already registered in VirtualBox?
+vbox_has() { VBoxManage list vms 2>/dev/null | grep -qiF "\"$1\""; }
+
+# ── --list: print the catalog, marking what's already built locally ──────────
+if [[ "$ACTION" == "list" ]]; then
+    echo "hack-house VM library — pointers only; chosen VMs are built locally:" >&2
+    while IFS=$'\t' read -r id name os size kind; do
+        if vbox_has "$name"; then mark="✓ installed"; else mark="↓ available"; fi
+        printf '  %-12s %-22s %-22s %-12s [%s]\n' "$mark" "$id" "$name" "$os" "$kind" >&2
+    done < <(jq -r '.vms[] | [.id, .name, .os, .size, .kind] | @tsv' "$MANIFEST")
+    echo "details: ./vbox-library.sh --info <id>   ·   build: ./vbox-library.sh --install <id>" >&2
+    exit 0
+fi
+
+# Everything past here needs a valid id.
+[[ -n "$ID" ]] || { echo "✖ no VM id given — see ./vbox-library.sh --list" >&2; exit 2; }
+vm_exists_in_manifest || { echo "✖ unknown VM id '$ID' — see ./vbox-library.sh --list" >&2; exit 2; }
+
+NAME="$(q name)"; OS="$(q os)"; SIZE="$(q size)"; KIND="$(q kind)"
+URL="$(q url)"; PAGE="$(q page)"; NOTES="$(q notes)"
+OSTYPE="$(q ostype)"; VERSION="$(q version)"
+CPUS="$(q cpus)"; MEM="$(q mem_mb)"; DISK="$(q disk_gb)"
+EFI="$(q efi)"; TPM="$(q tpm)"
+[[ -n "$CPUS" ]] || CPUS=2
+[[ -n "$MEM"  ]] || MEM=2048
+[[ -n "$DISK" ]] || DISK=20
+
+# ── --info: details + the honest "how to get it" pointer ─────────────────────
+if [[ "$ACTION" == "info" ]]; then
+    echo "● $NAME ($ID)" >&2
+    echo "  os    : $OS" >&2
+    echo "  size  : $SIZE" >&2
+    echo "  build : $KIND" >&2
+    [[ -n "$VERSION" ]] && echo "  pinned: v$VERSION" >&2
+    if vbox_has "$NAME"; then
+        echo "  state : ✓ already built locally — boot it with /sbx vbox \"$NAME\"" >&2
+    else
+        echo "  state : ↓ not installed" >&2
+    fi
+    [[ -n "$URL"  ]] && echo "  url   : $URL" >&2
+    [[ -n "$PAGE" ]] && echo "  page  : $PAGE" >&2
+    [[ -n "$NOTES" ]] && echo "  notes : $NOTES" >&2
+    echo "build locally with: ./vbox-library.sh --install $ID" >&2
+    exit 0
+fi
+
+# Where a downloaded image lands.
+EXT="iso"; [[ "$KIND" == "ova" ]] && EXT="ova"
+DL_PATH="$CACHE_DIR/${ID}.${EXT}"
+
+# ── --plan: describe the build, change nothing ───────────────────────────────
+if [[ "$ACTION" == "plan" ]]; then
+    echo "plan for '$NAME' (no changes will be made):" >&2
+    case "$KIND" in
+        manual)
+            echo "  ⚠ manual-only — cannot be auto-built (see notes)" >&2
+            echo "  notes: $NOTES" >&2
+            echo "  page : $PAGE" >&2
+            ;;
+        cloudimg)
+            echo "  hand off to vbox-new.sh → unattended cloud-init build" >&2
+            echo "  VM   : $NAME · ${CPUS} cpu · ${MEM}MiB · ${DISK}GiB · release ${VERSION:-24.04}" >&2
+            "$VBOX_NEW" --name "$NAME" --release "${VERSION:-24.04}" \
+                --cpus "$CPUS" --mem "$MEM" --disk "$DISK" --plan 2>&1 | sed 's/^/    /' >&2 || true
+            ;;
+        ova)
+            echo "  source : ${URL:-<none — supply --iso/appliance>}" >&2
+            echo "         → cache $DL_PATH" >&2
+            echo "  import : VBoxManage import (registers '$NAME')" >&2
+            ;;
+        iso)
+            iso_src="${ISO_OVERRIDE:-${URL:-<none>}}"
+            echo "  iso    : $iso_src" >&2
+            [[ -z "$ISO_OVERRIDE" && -n "$URL" ]] && echo "         → cache $DL_PATH" >&2
+            echo "  VM     : $NAME · ${CPUS} cpu · ${MEM}MiB · ${DISK}GiB" >&2
+            [[ "$EFI" == "true" ]] && echo "  firmware: EFI" >&2
+            [[ -n "$TPM" ]] && echo "  tpm    : $TPM" >&2
+            echo "  then   : boot the installer in the VirtualBox window" >&2
+            ;;
+    esac
+    exit 0
+fi
+
+[[ "$ACTION" == "install" ]] || { echo "✖ nothing to do — pass --list, --info <id>, --plan <id> or --install <id>" >&2; exit 2; }
+
+# ── install ──────────────────────────────────────────────────────────────────
+need VBoxManage || { echo "✖ VirtualBox (VBoxManage) is not installed — run ./ensure-vbox.sh first" >&2; exit 1; }
+
+# manual-only entries never auto-build: surface the pointer and stop.
+if [[ "$KIND" == "manual" ]]; then
+    echo "ⓘ '$NAME' can't be built automatically." >&2
+    echo "  $NOTES" >&2
+    echo "  follow: $PAGE" >&2
+    exit 1
+fi
+
+# Refuse to clobber an already-registered VM of the same name.
+if vbox_has "$NAME"; then
+    echo "✓ '$NAME' is already built — boot it with /sbx vbox \"$NAME\" (nothing to do)" >&2
+    exit 0
+fi
+
+# cloudimg: the existing, tested unattended path.
+if [[ "$KIND" == "cloudimg" ]]; then
+    echo "⛧ building '$NAME' via vbox-new.sh (cloud-init, unattended)…" >&2
+    args=(--name "$NAME" --release "${VERSION:-24.04}" --cpus "$CPUS" --mem "$MEM" --disk "$DISK")
+    [[ $ASSUME_YES -eq 1 ]] && args+=(--yes)
+    [[ $DO_BOOT -eq 0 ]] && args+=(--no-boot)
+    exec "$VBOX_NEW" "${args[@]}"
+fi
+
+mkdir -p "$CACHE_DIR"
+
+# Download helper → $DL_PATH. On failure, point at the page + --iso and bail
+# (never leave a partial file or a half-built VM behind).
+fetch() {
+    local url="$1" dst="$2"
+    [[ -f "$dst" ]] && { echo "↻ using cached $(basename "$dst")" >&2; return 0; }
+    echo "↓ downloading $(basename "$dst") … (this is large; be patient)" >&2
+    if need curl; then
+        curl -fL --retry 3 -o "$dst.partial" "$url"
+    elif need wget; then
+        wget -O "$dst.partial" "$url"
+    else
+        echo "✖ neither curl nor wget available to download" >&2; return 1
+    fi
+}
+
+# Resolve the source image: an explicit --iso wins; else download the pinned URL.
+SRC=""
+if [[ -n "$ISO_OVERRIDE" ]]; then
+    [[ -f "$ISO_OVERRIDE" ]] || { echo "✖ --iso path not found: $ISO_OVERRIDE" >&2; exit 1; }
+    SRC="$ISO_OVERRIDE"
+elif [[ -n "$URL" ]]; then
+    if fetch "$URL" "$DL_PATH"; then
+        mv "$DL_PATH.partial" "$DL_PATH" 2>/dev/null || true
+        SRC="$DL_PATH"
+    else
+        rm -f "$DL_PATH.partial"
+        echo "✖ couldn't download '$NAME' from the pinned URL (it may have moved)." >&2
+        echo "  get it from: $PAGE" >&2
+        echo "  then build with: ./vbox-library.sh --install $ID --iso <downloaded-file>" >&2
+        exit 1
+    fi
+else
+    echo "✖ no direct download for '$NAME' — download it yourself, then:" >&2
+    echo "  get it from: $PAGE" >&2
+    echo "  ./vbox-library.sh --install $ID --iso <downloaded-file>" >&2
+    exit 1
+fi
+
+# Confirmation (skipped with --yes).
+if [[ $ASSUME_YES -ne 1 ]]; then
+    printf 'Build VM "%s" now (%s, %s cpu / %sMiB / %sGiB)? [y/N] ' "$NAME" "$OS" "$CPUS" "$MEM" "$DISK" >&2
+    read -r reply
+    case "$reply" in y|Y|yes|YES) ;; *) echo "✖ aborted — nothing built" >&2; exit 1 ;; esac
+fi
+
+# ── ova: import the appliance and we're done ─────────────────────────────────
+if [[ "$KIND" == "ova" ]]; then
+    echo "⛧ importing appliance '$NAME' …" >&2
+    if VBoxManage import "$SRC" >/dev/null; then
+        echo "✓ imported '$NAME' — boot it with /sbx vbox \"$NAME\"" >&2
+        exit 0
+    fi
+    echo "✖ VBoxManage import failed" >&2; exit 1
+fi
+
+# ── iso: create a VM, attach the installer, boot it ──────────────────────────
+echo "⛧ creating VM '$NAME' (${OSTYPE:-Other_64}) …" >&2
+VBoxManage createvm --name "$NAME" --ostype "${OSTYPE:-Other_64}" --register >/dev/null
+
+# Roll the half-built VM back if any step below fails.
+cleanup() { VBoxManage unregistervm "$NAME" --delete >/dev/null 2>&1 || true; }
+trap 'echo "✖ build failed — rolling back VM" >&2; cleanup' ERR
+set -e
+
+MACHINE_FOLDER="$(VBoxManage list systemproperties | sed -n 's/^Default machine folder: *//p')"
+VMDIR="$MACHINE_FOLDER/$NAME"
+VDI="$VMDIR/$NAME.vdi"
+
+VBoxManage modifyvm "$NAME" \
+    --cpus "$CPUS" --memory "$MEM" \
+    --nic1 nat --graphicscontroller vmsvga --vram 64 \
+    --ioapic on --audio-driver none --boot1 dvd --boot2 disk >/dev/null
+# Windows 11 (and other modern guests) require EFI firmware + a TPM 2.0 device.
+[[ "$EFI" == "true" ]] && VBoxManage modifyvm "$NAME" --firmware efi >/dev/null
+[[ -n "$TPM" ]] && VBoxManage modifyvm "$NAME" --tpm-type "$TPM" >/dev/null
+
+# Boot disk.
+VBoxManage createmedium disk --filename "$VDI" --size "$((DISK * 1024))" --format VDI >/dev/null
+VBoxManage storagectl "$NAME" --name SATA --add sata --controller IntelAhci --portcount 2 >/dev/null
+VBoxManage storageattach "$NAME" --storagectl SATA --port 0 --device 0 --type hdd --medium "$VDI" >/dev/null
+# Installer ISO on an IDE optical drive.
+VBoxManage storagectl "$NAME" --name IDE --add ide >/dev/null
+VBoxManage storageattach "$NAME" --storagectl IDE --port 0 --device 0 --type dvddrive --medium "$SRC" >/dev/null
+
+trap - ERR   # past the rollback point
+
+echo "✓ VM '$NAME' created — the installer ISO is attached." >&2
+echo "  finish setup inside the VirtualBox window (it boots into the installer)." >&2
+
+if [[ $DO_BOOT -eq 1 ]]; then
+    echo "⛧ booting '$NAME' (GUI) …" >&2
+    VBoxManage startvm "$NAME" --type gui >/dev/null
+    echo "✓ launched $NAME" >&2
+else
+    echo "ⓘ not booting (--no-boot); start later with: /sbx vbox \"$NAME\"" >&2
+fi