What is activity-monitor?

A background guardian service that watches whether a running coding agent is responsive and restarts it when it stops or crashes.

Use it to track agent activity, record health status, send heartbeat checks, and trigger automatic restarts.

It reduces manual recovery when the agent becomes unresponsive or the process fails.

activity-monitor — Skill for Claude Code by zylos-ai/zylos-core

About the project

Zylos is open-source infrastructure that gives an AI agent persistent memory, scheduled activity, communication channels, and the ability to maintain and extend itself. Individuals and teams use it with Claude Code or Codex through Telegram, Lark, or a web console. Its catalogue add-ons define settings, instructions, and skills for operating the agent.

zylos-ai/zylos-core · 1,160 stars · on GitHub · zylos.ai

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add zylos-ai/zylos-core --skill activity-monitor

Clone the repo

git clone --depth 1 https://github.com/zylos-ai/zylos-core

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/zylos-ai/zylos-core/activity-monitor/github.svg)](https://agentmods.dev/skills/zylos-ai/zylos-core/activity-monitor)

Your own site

<a href="https://agentmods.dev/skills/zylos-ai/zylos-core/activity-monitor"><img src="https://agentmods.dev/badge/skills/zylos-ai/zylos-core/activity-monitor/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/zylos-ai/zylos-core/activity-monitor"><img src="https://agentmods.dev/badge/skills/zylos-ai/zylos-core/activity-monitor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,572 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 8 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Excessive Agency · line 197
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Excessive Agency · line 199
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Excessive Agency · line 207
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Excessive Agency · line 214
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Excessive Agency · line 217
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Excessive Agency · line 220
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Excessive Agency · line 208
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Excessive Agency · line 213
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00036	$0.02572
Opus 5.5	$0.00014	$0.01029
Sonnet 5.5	$0.00007	$0.00514
Haiku 4.5	$0.00004	$0.00257

Measured 24d ago against content hash 1e3a01710d56, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

activity-monitor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 24d ago.

The scan reads SKILL.md. This mod also ships 57 executable files (scripts/__tests__/claude-pid.test.js, scripts/__tests__/emit-custom-inject.test.js, scripts/__tests__/guardian.test.js, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/activity-monitor/SKILL.md · 210 lines

How it starts

The opening of the file, as written. The whole thing — 210 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Activity Monitor Skill

PM2 guardian service that monitors the active runtime agent's (Claude or Codex) activity state and ensures it's always running.

When to Use

This is a PM2 service (not directly invoked by Claude). It runs continuously in the background.

What It Does

Activity Monitoring: Tracks the agent's busy/idle state every second
Status File: Writes ~/zylos/activity-monitor/agent-status.json with current state (busy/idle, idle_seconds, health)
Guardian Mode: Automatically restarts the agent if it stops or crashes
Maintenance Awareness: Waits for restart/upgrade scripts to complete before starting the agent
Recovery Liveness Detection: Sends C4 heartbeat probes during recovery and after restarts; healthy sessions have no periodic primary heartbeat
Health Check: Periodically enqueues system health checks (PM2, disk, memory) via the C4 control queue
Daily Upgrade: Enqueues a Claude Code upgrade via the C4 control queue at 5:00 AM local time daily (disabled by default; enable with zylos config set daily_upgrade_enabled true)
Context Monitoring: Receives context usage data after every turn; triggers early memory sync and new-session handoff at thresholds read from config.json (new_session_threshold for Claude, codex_new_session_threshold for Codex), each with a built-in runtime fallback if the key is unset

Status File Format

{
  "state": "idle",
  "last_activity": 1738675200,
  "last_check": 1738675210,
  "last_check_human": "2026-02-04 20:30:10",
  "idle_seconds": 5,
  "inactive_seconds": 10,
  "source": "conv_file",
  "health": "ok"
}

state: "busy" | "idle" | "stopped" | "offline"
idle_seconds: Time since entering idle state (0 when busy)
source: "conv_file" (reliable) | "tmux_activity" (fallback)
health: "ok" | "unavailable" | "rate_limited" | "auth_failed" — current public health; legacy recovering / down states remain readable

PM2 Management

Read the full file on GitHub · 210 lines

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

24d ago Changed · +3 lines 1e3a01710d56
1mo ago Changed · -20 lines 6627ab3ec578
2mo ago First seen · 227 lines · 36 tokens per session scan A a931d5610668

Subscribe to this mod's changes

activity-monitor is a skill published in the GitHub repository zylos-ai/zylos-core (1,160 stars, last pushed yesterday), licensed MIT. It adds 36 tokens to every session and 2,572 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

ai ai-worker own-your-data personal-ai-assistant self-evolving team-collaboration

activity-monitor next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
activity-monitorzylos-ai/zylos-core	Skill	1.2k	yesterday	MIT	A	36	Claude Code
imsgopenclaw/openclaw	Skill	394k	yesterday	MIT	A	37	Claude Code, Codex
gogopenclaw/openclaw	Skill	394k	yesterday	MIT	A	20	Claude Code, Codex
node-connectopenclaw/openclaw	Skill	394k	yesterday	MIT	A	39	Claude Code, Codex
crabbox-appsopenclaw/openclaw	Skill	394k	yesterday	MIT	A	39	Claude Code
node-inspect-debuggeropenclaw/openclaw	Skill	394k	yesterday	MIT	A	28	Claude Code, Codex
peekabooopenclaw/openclaw	Skill	394k	yesterday	MIT	A	17	Claude Code, Codex