loop.sh

#!/bin/bash
set -euo pipefail

# Usage:
#   ./loop.sh [plan] [max_iterations]       # Plan/build on current branch
# Examples:
#   ./loop.sh                               # Build mode, unlimited
#   ./loop.sh 20                            # Build mode, max 20
#   ./loop.sh plan 5                        # Full planning, max 5

# Parse arguments
MODE="build"
PROMPT_FILE="prompts/build.md"

if [ "$1" = "plan" ]; then
    # Full planning mode
    MODE="plan"
    PROMPT_FILE="prompts/plan.md"
    MAX_ITERATIONS=${2:-0}
elif [[ "$1" =~ ^[0-9]+$ ]]; then
    # Build mode with max iterations
    MAX_ITERATIONS=$1
else
    # Build mode, unlimited
    MAX_ITERATIONS=0
fi

ITERATION=0
CURRENT_BRANCH=$(git branch --show-current)

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "Mode:   $MODE"
echo "Branch: $CURRENT_BRANCH"
echo "Prompt: $PROMPT_FILE"
echo "Plan:   IMPLEMENTATION_PLAN.md"
[ "$MAX_ITERATIONS" -gt 0 ] && echo "Max:    $MAX_ITERATIONS iterations"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

# Verify prompt file exists
if [ ! -f "$PROMPT_FILE" ]; then
    echo "Error: $PROMPT_FILE not found"
    exit 1
fi

# Main loop
while true; do
    if [ "$MAX_ITERATIONS" -gt 0 ] && [ "$ITERATION" -ge "$MAX_ITERATIONS" ]; then
        echo "Reached max iterations: $MAX_ITERATIONS"
        break
    fi

    # Run Ralph iteration with selected prompt
    # -p: Headless mode (non-interactive, reads from stdin)
    # --dangerously-skip-permissions: Auto-approve all tool calls (YOLO mode)
    # --output-format=stream-json: Structured output for logging/monitoring
    # --model opus: Primary agent uses Opus for complex reasoning (task selection, prioritization)
    #               Can use 'sonnet' for speed if plan is clear and tasks well-defined
    # --verbose: Detailed execution logging

    PROMPT_CONTENT=$(cat "$PROMPT_FILE")
    sbx run claude . -- \
        --output-format=stream-json \
        --model opus \
        --verbose \
        -p "$PROMPT_CONTENT"

    # Push to current branch
    CURRENT_BRANCH=$(git branch --show-current)
    git push origin "$CURRENT_BRANCH" || {
        echo "Failed to push. Creating remote branch..."
        git push -u origin "$CURRENT_BRANCH"
    }

    ITERATION=$((ITERATION + 1))
    echo -e "\n\n======================== LOOP $ITERATION ========================\n"
done