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>

.claude/skills/send-slack-message.md

@@ -0,0 +1,48 @@
+---
+name: send-slack-message
+description: Send a message to a Slack channel via MCP. Demonstrates multi-channel messaging capability.
+---
+
+# Send Slack Message
+
+Send a message to a Slack channel. This demonstrates how Claude Code
+handles messaging through MCP servers, compared to OpenClaw's 15+
+native channel integrations.
+
+## Prerequisites
+
+You need a Slack MCP server configured in `.mcp.json`. Example:
+
+```json
+{
+  "mcpServers": {
+    "slack": {
+      "command": "npx",
+      "args": ["@anthropic-ai/mcp-slack@latest"],
+      "env": {
+        "SLACK_BOT_TOKEN": "xoxb-your-token-here"
+      }
+    }
+  }
+}
+```
+
+## Usage
+
+Tell Claude Code: "Send a message to #general saying [your message]"
+
+Claude Code will use the Slack MCP server's `send_message` tool.
+
+## How this compares to OpenClaw
+
+OpenClaw has native Slack integration (Bolt SDK, no config needed
+beyond token). Claude Code uses MCP as the integration layer. The
+result is the same: a message arrives in Slack. The setup differs:
+OpenClaw is plug-and-play, Claude Code requires MCP configuration.
+
+## Other messaging channels
+
+- **Telegram:** Native via Claude Code Channels (v2.1.80+)
+- **Discord:** Via MCP server
+- **Email:** Via MCP server (e.g., Gmail MCP)
+- **Teams:** Via MCP server or webhook