Add session resuming

sloptrap

@@ -30,6 +30,8 @@ print_styled() {
     for arg in "$@"; do
       colored_args+=("$COLOR_HIGHLIGHT$arg$color")
     done
+    # Format strings are defined within sloptrap, not user input.
+    # shellcheck disable=SC2059
     printf "$fmt" "${colored_args[@]}"
   else
     printf '%b' "$fmt"
@@ -50,6 +52,8 @@ print_styled_err() {
     for arg in "$@"; do
       colored_args+=("$COLOR_HIGHLIGHT$arg$color")
     done
+    # Format strings are defined within sloptrap, not user input.
+    # shellcheck disable=SC2059
     printf "$fmt" "${colored_args[@]}" >&2
   else
     printf '%b' "$fmt" >&2
@@ -121,6 +125,7 @@ usage() {
   info_line "\n"
   info_line "Example targets:\n"
   comment_line "  run               Build if needed, then launch Codex\n"
+  comment_line "  resume <id>       Build if needed, then run 'codex resume <id>'\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"
@@ -1026,17 +1031,25 @@ prune_sloptrap_images() {
   run_or_print "${cmd[@]}"
 }
 
-run_codex() {
-  if ! $DRY_RUN; then
-    status_line "Running %s\n" "$SLOPTRAP_IMAGE_NAME"
-  fi
+run_codex_command() {
+  local -a extra_args=("$@")
   local -a cmd=("${BASE_CONTAINER_CMD[@]}" "$SLOPTRAP_IMAGE_NAME")
   if [[ ${#CODEX_ARGS_ARRAY[@]} -gt 0 ]]; then
     cmd+=("${CODEX_ARGS_ARRAY[@]}")
   fi
+  if [[ ${#extra_args[@]} -gt 0 ]]; then
+    cmd+=("${extra_args[@]}")
+  fi
   run_or_print "${cmd[@]}"
 }
 
+run_codex() {
+  if ! $DRY_RUN; then
+    status_line "Running %s\n" "$SLOPTRAP_IMAGE_NAME"
+  fi
+  run_codex_command
+}
+
 run_login_target() {
   if ! $DRY_RUN; then
     status_line "Login %s\n" "$SLOPTRAP_IMAGE_NAME"
@@ -1053,6 +1066,23 @@ run_shell_target() {
   run_or_print "${cmd[@]}"
 }
 
+run_resume_target() {
+  local session_id=$1
+  if ! $DRY_RUN; then
+    status_line "Resume %s (%s)\n" "$SLOPTRAP_IMAGE_NAME" "$session_id"
+  fi
+  run_codex_command resume "$session_id"
+}
+
+process_resume_target() {
+  local session_id=$1
+  if [[ -z $session_id ]]; then
+    error "target 'resume' requires a session identifier"
+  fi
+  build_if_missing
+  run_resume_target "$session_id"
+}
+
 dispatch_target() {
   local target=$1
   case "$target" in
@@ -1267,6 +1297,17 @@ if $AUTO_LOGIN; then
   dispatch_target login
 fi
 
-for target in "${TARGETS[@]}"; do
-  dispatch_target "$target"
+target_index=0
+while (( target_index < ${#TARGETS[@]} )); do
+  current_target="${TARGETS[$target_index]}"
+  if [[ $current_target == "resume" ]]; then
+    if (( target_index + 1 >= ${#TARGETS[@]} )); then
+      error "target 'resume' requires a session identifier"
+    fi
+    process_resume_target "${TARGETS[$((target_index + 1))]}"
+    ((target_index+=2))
+    continue
+  fi
+  dispatch_target "$current_target"
+  ((target_index+=1))
 done