Ralph Wiggum loop script

INSTRUCTIONS.MD

How to run:

• install docker
• run docker sandbox run --credentials host claude and log in to Claude

Then, make script executable:

chmod +x ralph.sh

Run it:

./ralph.sh 10 

This will run for 10 iterations.

ralph.sh

#!/bin/bash
set -e

if [ -z "$1" ]; then
  echo "Usage: $0 <iterations>"
  exit 1
fi

# jq filter to extract streaming text from assistant messages
stream_text='select(.type == "assistant").message.content[]? | select(.type == "text").text // empty | gsub("\n"; "\r\n") | . + "\r\n\n"'

# jq filter to extract final result
final_result='select(.type == "result").result // empty'

for ((i=1; i<=$1; i++)); do
  tmpfile=$(mktemp)
  trap "rm -f $tmpfile" EXIT

  docker sandbox run --credentials host claude \
    --verbose \
    --print \
    --output-format stream-json \
    "<your prompt here>" \
  | grep --line-buffered '^{' \
  | tee "$tmpfile" \
  | jq --unbuffered -rj "$stream_text"

  result=$(jq -r "$final_result" "$tmpfile")

  if [[ "$result" == *"<promise>COMPLETE</promise>"* ]]; then
    echo "Ralph complete after $i iterations."
    exit 0
  fi
done