Initial commit: OpenClaw Skill Collection

6 custom skills (assign-task, dispatch-webhook, daily-briefing,
task-capture, qmd-brain, tts-voice) with technical documentation.
Compatible with Claude Code, OpenClaw, Codex CLI, and OpenCode.

openclaw-knowhow-skill/docs/reference/cli/system.md

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+# system
+
+# `openclaw system`
+
+System-level helpers for the Gateway: enqueue system events, control heartbeats, and view presence.
+
+## Key Capabilities
+
+**System Events**: Enqueue messages that inject into prompts as system lines, with options to trigger immediately or await the next scheduled heartbeat.
+
+**Heartbeat Management**: Enable, disable, or check the status of periodic heartbeat events.
+
+**Presence Monitoring**: Display current system presence entries including nodes and instance statuses.
+
+## Commands
+
+```bash
+openclaw system event --text "message" --mode now
+openclaw system event --text "message" --mode next-heartbeat
+openclaw system heartbeat status
+openclaw system heartbeat enable
+openclaw system heartbeat disable
+openclaw system presence
+```
+
+## Notable Parameters
+
+The system event command accepts text content, execution mode selection (`now` or `next-heartbeat`), and optional JSON output formatting. Similarly, heartbeat and presence commands support JSON output for programmatic use.
+
+## Requirements
+
+A running Gateway reachable by your current config (local or remote) is necessary. Note that system events are temporary rather than persisting across restarts.