Ralph.sh with DevContainers and improved error handling

ralph.sh

set -e

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

i=1
while [ $i -le $1 ]; do
  echo "Iteration $i"
  echo "--------------------------------"
  echo "Running claude command..."
  if ! result=$(claude --dangerously-skip-permissions -p "@docs/specs/prd.json @progress.txt \
1. Find the highest-priority feature to work on and work only on that feature. \
This should be the one YOU decide has the highest priority - not necessarily the first in the list. \
2. Check that the types check via pnpm typecheck and that the tests pass via pnpm test. \
3. Update the PRD with the work that was done. \
4. Append your progress to the progress.txt file. \
Use this to leave a note for the next person working in the codebase. \
5. Make a git commit of that feature. \
ONLY WORK ON A SINGLE FEATURE. \
If, while implementing the feature, you notice the PRD is complete, output <promise>COMPLETE</promise>. \
" 2>&1); then
    echo "ERROR: Claude command failed with exit code $?"
    echo "Output: $result"
    exit 1
  fi

  echo "$result"

  if echo "$result" | grep -q "<promise>COMPLETE</promise>"; then
    echo "PRD complete, exiting."
    exit 0
  fi

  i=$((i + 1))
done