Fix sloptrap name

sloptrap

@@ -101,6 +101,8 @@ MANIFEST_BASENAME=".sloptrap"
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 VALID_NAME_REGEX='^[A-Za-z0-9_.-]+$'
 DEFAULT_CODEX_ARGS=(--sandbox workspace-write)
+SLOPTRAP_IMAGE_LABEL_KEY="net.sk4nz.sloptrap.managed"
+SLOPTRAP_IMAGE_LABEL="${SLOPTRAP_IMAGE_LABEL_KEY}=1"
 
 usage() {
   print_banner
@@ -116,6 +118,12 @@ usage() {
   comment_line "  packages_extra=kubectl helm\n"
   comment_line "  default_targets=run\n"
   comment_line "  codex_args=--sandbox workspace-write\n"
+  info_line "\n"
+  info_line "Example targets:\n"
+  comment_line "  run               Build if needed, then launch Codex\n"
+  comment_line "  shell             Drop into an interactive /bin/bash session\n"
+  comment_line "  clean             Remove the project container/image cache\n"
+  comment_line "  prune             Remove dangling/unused sloptrap images\n"
 }
 
 error() {
@@ -212,7 +220,7 @@ FROM ${BASE_IMAGE}
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-ARG BASE_PACKAGES="curl bash ca-certificates libstdc++6 ripgrep xxd file"
+ARG BASE_PACKAGES="curl bash ca-certificates libstdc++6 ripgrep xxd file procps"
 ARG EXTRA_PACKAGES=""
 RUN apt-get update \
  && apt-get install -y --no-install-recommends apt-utils ${BASE_PACKAGES} ${EXTRA_PACKAGES} \
@@ -785,7 +793,7 @@ prepare_container_runtime() {
     SLOPTRAP_DOCKERFILE_SOURCE=""
   fi
 
-  SLOPTRAP_PACKAGES_BASE=$(get_env_default "SLOPTRAP_PACKAGES" "curl bash ca-certificates libstdc++6 git ripgrep xxd file")
+  SLOPTRAP_PACKAGES_BASE=$(get_env_default "SLOPTRAP_PACKAGES" "curl bash ca-certificates libstdc++6 git ripgrep xxd file procps")
   SLOPTRAP_CODEX_URL=$(get_env_default "SLOPTRAP_CODEX_URL" "https://github.com/openai/codex/releases/latest/download/codex-x86_64-unknown-linux-gnu.tar.gz")
   SLOPTRAP_CODEX_BIN_NAME=$(get_env_default "SLOPTRAP_CODEX_BIN" "codex")
   SLOPTRAP_CODEX_HOME_CONT=$(get_env_default "SLOPTRAP_CODEX_HOME_CONT" "/codex")
@@ -906,6 +914,7 @@ build_image() {
     "$CONTAINER_ENGINE" build --quiet
     -t "$SLOPTRAP_IMAGE_NAME"
     -f "$SLOPTRAP_DOCKERFILE_PATH"
+    --label "$SLOPTRAP_IMAGE_LABEL"
     --build-arg "BASE_PACKAGES=$SLOPTRAP_PACKAGES_BASE"
     --build-arg "CODEX_BIN=$SLOPTRAP_CODEX_BIN_NAME"
     --build-arg "CODEX_UID=$SLOPTRAP_CODEX_UID"
@@ -941,6 +950,7 @@ rebuild_image() {
     "$CONTAINER_ENGINE" build --no-cache
     -t "$SLOPTRAP_IMAGE_NAME"
     -f "$SLOPTRAP_DOCKERFILE_PATH"
+    --label "$SLOPTRAP_IMAGE_LABEL"
     --build-arg "BASE_PACKAGES=$SLOPTRAP_PACKAGES_BASE"
     --build-arg "CODEX_BIN=$SLOPTRAP_CODEX_BIN_NAME"
     --build-arg "CODEX_UID=$SLOPTRAP_CODEX_UID"
@@ -1005,6 +1015,17 @@ clean_environment() {
   rm -rf "$helper_root"
 }
 
+prune_sloptrap_images() {
+  if ! $DRY_RUN; then
+    status_line "Pruning unused sloptrap images\n"
+  fi
+  local -a cmd=(
+    "$CONTAINER_ENGINE" image prune --force --all
+    --filter "label=$SLOPTRAP_IMAGE_LABEL"
+  )
+  run_or_print "${cmd[@]}"
+}
+
 run_codex() {
   if ! $DRY_RUN; then
     status_line "Running %s\n" "$SLOPTRAP_IMAGE_NAME"
@@ -1063,6 +1084,9 @@ dispatch_target() {
     clean)
       clean_environment
       ;;
+    prune)
+      prune_sloptrap_images
+      ;;
     *)
       error "unknown target '$target'"
       ;;