Add SessionStart hook to install rea-agents in cloud sessions

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FXVsD1DgdzZLiPuwtKzMSY

.claude/hooks/session-start.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -euo pipefail
+
+# Only run in Claude Code cloud sessions.
+if [ "${CLAUDE_CODE_REMOTE:-}" != "true" ]; then
+  exit 0
+fi
+
+# Install the rea CLI (used by the reverse-engineer-anything skill) if missing.
+if ! command -v rea >/dev/null 2>&1; then
+  npm install --global rea-agents
+fi