Setup Ralph.

ralph-sandbox.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# ABOUTME: Wrapper script to run Ralph in Nix-isolated environment.
+# ABOUTME: Uses the 'ralph' devShell for restricted execution.
+
+# Usage: ./ralph-sandbox.sh [args...]
+# Examples:
+#   ./ralph-sandbox.sh plan 3     # Plan mode, 3 iterations
+#   ./ralph-sandbox.sh 10         # Build mode, 10 iterations
+#   ./ralph-sandbox.sh            # Build mode, unlimited
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "🔒 Launching Ralph in Nix Sandbox"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+
+# Run loop.sh inside the ralph devShell
+nix develop "${SCRIPT_DIR}#ralph" --command "${SCRIPT_DIR}/loop.sh" "$@"