tools: rewrite subagent_spawn as thin wrapper around b/q -parallel

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

tools/subagent_spawn

@@ -8,16 +8,16 @@ OLLIE="${OLLIE:-$HOME/mnt/ollie}"
 
 die() { printf 'subagent_spawn: %s\n' "$*" >&2; exit 1; }
 
-n=1; agent=; backend=; model=; cwd=; keep=0
+n=1; args=()
 
 while [ $# -gt 0 ]; do
     case $1 in
-        -n)       n=$2;       shift ;;
-        -agent)   agent=$2;   shift ;;
-        -backend) backend=$2; shift ;;
-        -model)   model=$2;   shift ;;
-        -cwd)     cwd=$2;     shift ;;
-        -keep)    keep=1 ;;
+        -n)       n=$2;                          shift ;;
+        -agent)   args+=(-agent   "$2");          shift ;;
+        -backend) args+=(-backend "$2");          shift ;;
+        -model)   args+=(-model   "$2");          shift ;;
+        -cwd)     args+=(-cwd     "$2");          shift ;;
+        -keep)    args+=(-keep) ;;
         --)       shift; break ;;
         -*)       die "unknown flag: $1" ;;
         *)        break ;;
@@ -26,52 +26,5 @@ while [ $# -gt 0 ]; do
 done
 
 [ $# -eq 0 ] && die "prompt required"
-prompt="$*"
-cwd="${cwd:-$(pwd)}"
 
-base="spawn-$(date +%s%N)-$$"
-
-# Submit all jobs as one parallel spec.
-{
-    printf 'name=%s\n'     "$base"
-    printf 'cwd=%s\n'      "$cwd"
-    [ -n "$agent"   ] && printf 'agent=%s\n'   "$agent"
-    [ -n "$backend" ] && printf 'backend=%s\n' "$backend"
-    [ -n "$model"   ] && printf 'model=%s\n'   "$model"
-    printf 'parallel=%s\n' "$n"
-    printf -- '---\n'
-    printf '%s\n' "$prompt"
-} > "$OLLIE/b/new" || die "failed to submit jobs"
-
-# Fork: poll each job's status in a background subshell, write result to tmpdir.
-tmpdir=$(mktemp -d)
-trap 'rm -rf "$tmpdir"' EXIT
-
-declare -a pids
-for i in $(seq 0 $((n - 1))); do
-    id="${base}-${i}"
-    (
-        while true; do
-            status=$(tr -d '[:space:]' < "$OLLIE/b/$id/status" 2>/dev/null) || { sleep 0.05; continue; }
-            case "$status" in
-                done*)   cat "$OLLIE/b/$id/result" 2>/dev/null > "$tmpdir/$i"; break ;;
-                failed*) printf 'error: subagent %s failed: %s\n' "$id" "$status" > "$tmpdir/$i"; break ;;
-                *)       sleep 0.05 ;;
-            esac
-        done
-    ) &
-    pids[$i]=$!
-done
-
-# Join: wait for all pollers.
-for i in $(seq 0 $((n - 1))); do
-    wait "${pids[$i]}"
-done
-
-# Collect results in submission order.
-for i in $(seq 0 $((n - 1))); do
-    id="${base}-${i}"
-    [ "$n" -gt 1 ] && printf '=== %s ===\n' "$id"
-    cat "$tmpdir/$i" 2>/dev/null || true
-    [ "$keep" -eq 0 ] && rm -r "$OLLIE/b/$id" 2>/dev/null || true
-done
+exec "$OLLIE/b/q" -parallel "$n" "${args[@]}" "$@"