system-watchdog（系统看门狗）

System Watchdog

System watchdog for your machine. Detect real, actionable anomalies and stay quiet about normal steady-state conditions. Auto-detects Linux vs macOS.

Goal

Optimize for few, high-signal alerts.

Do not alert on:

• process age alone (long-running is not "stale")
• Docker/container/virtualization baseline memory usage
• absolute disk-used GB unless near a real limit
• generic top-process lists without an actual anomaly

Do alert on:

• memory pressure that is worsening (swap growth, low available memory, macOS compressor pressure)
• runaway process growth (memory leak signals via delta tracking)
• sustained abnormal CPU burn (>2 cores for >15 min)
• disk pressure near a practical limit (>90% or <20 GB free)

How to Invoke

bash ~/.openclaw/skills/system-watchdog/check.sh

The script outputs JSON to stdout. Parse the output and decide whether to report.

Override the state file path: SYSTEM_WATCHDOG_STATE=/path/to/state.json

Output Format

{
  "suspicious": true,
  "verdict": "watch|investigate|act_now|ok",
  "os": "Darwin|Linux",
  "summary": {
    "ram": "19.3/32.0 GB (60.4%)",
    "swap": "1.6/3.0 GB",
    "swap_delta": "+0.2 GB",
    "load": "3.30/2.21/2.17",
    "cores": 10,
    "disk": "14/926 GB (3%)",
    "available": "8.50 GB available",
    "free": "0.08 GB truly free",
    "inactive": "11.88 GB inactive/speculative",
    "compressed": "5.16 GB compressed"
  },
  "issues": [ ],
  "top_processes": [ ],
  "ignored_normals": [ ]
}

Note: available is Linux-only (MemAvailable). free, inactive, compressed are macOS-only (vm_stat breakdown).

Detection Philosophy

1. Memory pressure, not just RAM usage

High RAM usage alone is noisy. The script tracks swap growth since last run and low available/free memory as stronger signals. On macOS, high compressor usage with low free pages is also flagged.

2. Runaway behavior, not stale age

Never flag a process just because it has been running a long time. Look for memory growth (delta since last run) and sustained CPU instead.

3. Disk only when it matters

Ignore absolute disk usage. Only report disk when it is actually nearing a practical limit.

Agent Workflow

1. Run check.sh
2. Parse the JSON output
3. If suspicious is false → do nothing (no message)
4. If suspicious is true → format a concise report
5. Lead with the verdict and the 1–3 most important findings

Report Format

⚠️ System Watchdog — VERDICT

Why this matters:
- <1–3 concise findings from issues[].why>

Evidence:
- RAM <summary.ram>
- Swap <summary.swap> (<summary.swap_delta>)
- Load <summary.load>

Recommended:
- <issue suggested_action>

Ignored: process age, Docker baseline, disk absolute usage

Keep it short. Do not dump every top process unless it directly supports an issue.

State Tracking

The script persists lightweight state to ~/.openclaw/workspace/state/system-watchdog-state.json so it can detect changes since last run (swap growth, per-process memory growth) rather than only snapshot values.