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>

examples/08-cron-automation/prompt.md

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+# Example 08: Cron and Scheduled Automation
+
+**Capability:** Claude Code supports scheduled and automated execution through
+three complementary mechanisms, covering in-session polling through to
+system-level cron jobs.
+
+**OpenClaw equivalent:** HEARTBEAT.md, cron scheduler, webhooks, auto-reply.
+
+---
+
+## Three Approaches
+
+### Approach 1: /loop (In-session polling, v2.1.71)
+
+For tasks that should repeat while Claude Code is running:
+
+```
+/loop interval=60
+
+Every 60 seconds, check if a file called 'trigger.txt' exists in this
+directory. If it does, read its contents, execute the task described inside,
+delete the file, and write the result to 'loop-output.md'. Then wait for
+the next trigger.
+```
+
+Use this for development and testing. The loop runs as long as the session
+is active.
+
+---
+
+### Approach 2: CronCreate (System-level scheduling, v2.1.71)
+
+For tasks that should run on a schedule even when Claude Code is not open:
+
+```
+Create a cron job that runs the 'daily-briefing' skill every morning at 07:00.
+Use the automation/daily-briefing.sh wrapper script. Show me the cron entry
+before creating it so I can verify it.
+```
+
+Claude Code calls `CronCreate` to register the job with the system cron daemon.
+Use `CronList` to see all registered jobs and `CronDelete` to remove them.
+The `automation/daily-briefing.sh` script in this repo is a ready-made wrapper.
+
+---
+
+### Approach 3: /schedule (Remote trigger, web only)
+
+For triggering runs from anywhere, including from a phone:
+
+```
+/schedule "Run the web-research skill on 'latest Anthropic news' and
+email me a summary" at 2025-04-01T08:00:00
+```
+
+`/schedule` is available in the Claude web interface. It queues a headless
+Claude Code run for the specified time. Combines with the Telegram permission
+relay (v2.1.81) for approval-gated automation.
+
+---
+
+## Why This Matters
+
+OpenClaw uses HEARTBEAT.md as a persistent loop marker. Claude Code achieves
+the same outcome with more granularity: /loop for in-process polling, CronCreate
+for system scheduling, /schedule for remote triggering. The `automation/` directory
+in this repo provides macOS launchd examples as an alternative to cron.