feat: initial companion repo for OpenClaw vs Claude Code article

40 files demonstrating every major OpenClaw capability using Claude Code:
- 3 agents (researcher, writer, reviewer)
- 3 skills (daily-briefing, slack-message, web-research)
- 2 security hooks (pre-tool-use blocker, post-tool-use logger)
- 10 self-contained examples with copy-paste prompts
- Complete feature map (20 capabilities, 11 full match, 7 different, 2 gap)
- Security docs including NemoClaw comparison
- Automation, messaging, browser, memory documentation

Zero dependencies. Clone and run.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

hooks/pre-tool-use.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+# PreToolUse hook: Block dangerous shell commands before execution.
+#
+# This hook reads the tool input from stdin (JSON with tool_name and tool_input)
+# and blocks commands that could cause serious damage.
+#
+# How it works:
+# - Claude Code calls this script BEFORE executing any Bash command
+# - If the script exits with code 2, the command is BLOCKED
+# - The "decision" field in stdout JSON controls the outcome
+#
+# OpenClaw equivalent: exec approvals + tool deny lists + Docker sandbox
+# Claude Code approach: hook-based guardrails (more flexible, user-controlled)
+
+input=$(cat)
+tool_name=$(echo "$input" | python3 -c "import sys,json; print(json.load(sys.stdin).get('tool_name',''))" 2>/dev/null)
+command=$(echo "$input" | python3 -c "import sys,json; print(json.load(sys.stdin).get('tool_input',{}).get('command',''))" 2>/dev/null)
+
+# Only check Bash commands
+if [ "$tool_name" != "Bash" ]; then
+  exit 0
+fi
+
+# Blocked patterns
+blocked_patterns=(
+  "rm -rf /"
+  "rm -rf ~"
+  "rm -rf \$HOME"
+  "mkfs"
+  "dd if="
+  ":(){:|:&};:"
+  "chmod -R 777 /"
+  "curl.*|.*bash"
+  "wget.*|.*bash"
+  "curl.*|.*sh"
+  "wget.*|.*sh"
+  "> /dev/sda"
+  "sudo rm"
+  "shutdown"
+  "reboot"
+  "init 0"
+  "init 6"
+)
+
+for pattern in "${blocked_patterns[@]}"; do
+  if echo "$command" | grep -qi "$pattern"; then
+    echo '{"decision": "block", "reason": "Blocked by security hook: command matches dangerous pattern '"'$pattern'"'"}'
+    exit 2
+  fi
+done
+
+# Allow everything else
+exit 0