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.
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.
npx skills add zylos-ai/zylos-core --skill health-checkgit clone --depth 1 https://github.com/zylos-ai/zylos-coreWrote 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.
[](https://agentmods.dev/skills/zylos-ai/zylos-core/health-check)<a href="https://agentmods.dev/skills/zylos-ai/zylos-core/health-check"><img src="https://agentmods.dev/badge/skills/zylos-ai/zylos-core/health-check/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.
<a href="https://agentmods.dev/skills/zylos-ai/zylos-core/health-check"><img src="https://agentmods.dev/badge/skills/zylos-ai/zylos-core/health-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00038 | $0.00452 |
| Opus 5 | $0.00019 | $0.00226 |
| Sonnet 5 | $0.00008 | $0.00090 |
| Haiku 4.5 | $0.00004 | $0.00045 |
Grade A, and why
health-check 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 13d ago.
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.
What it actually says
System Health Check
Periodic system health check delivered via the C4 Control queue.
When to Use
- Receiving a control message with "health-check" in the content
- The activity monitor enqueues this automatically at regular intervals
Steps
1. Check PM2 Services
pm2 jlist
Parse the JSON output. Every service should have status: "online".
Record which services are stopped or errored.
2. Check Disk Space
df -h / /home 2>/dev/null || df -h /
Thresholds:
- OK: < 80% used
- Warning: 80-90% used
- Critical: > 90% used
3. Check Memory
free -m
Thresholds:
- OK: < 80% used
- Warning: 80-90% used
- Critical: > 90% used (or swap > 50% used)
4. Report Results
If all checks pass, log to ~/zylos/logs/health.log:
[YYYY-MM-DD HH:MM:SS] Health Check: PM2 X/X online, Disk XX%, Memory XX% - ALL OK
If any issues found, notify whoever is most likely to help:
- Check your memory files for a designated owner or ops person
- If none designated, notify the person you normally work with most
- Use
c4-send.jswith the appropriate channel and endpoint to send the alert
Issue Resolution
| Issue | Action |
|---|---|
| PM2 service stopped | pm2 restart <service> and report |
| High disk usage | Check logs directories, report findings |
| High memory / swap | Report findings, check for runaway processes |
What ships with it
1 file 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.
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.
- 13d ago First seen · 73 lines · 38 tokens per session scan A 9a5fb2624933
health-check is a skill published in the GitHub repository zylos-ai/zylos-core (1,152 stars, last pushed 3d ago), licensed MIT. It adds 38 tokens to every session and 452 once invoked, about $0.0002 per session on Opus 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.
Other skills, from other repositories
cloudflare-skill
Work with Cloudflare via the official cf CLI — check auth identity, list zones, list/create/delete DNS records, query the GraphQL Analytics API (zone traffic, Web Analytics/RUM), and run any other cf command. Output is parsed JSON.
gcloud-skill
Work with Google Cloud via the official gcloud CLI — check auth/config, list and switch projects, manage Compute Engine instances, deploy and inspect Cloud Run services, work with Cloud Storage, and run any other gcloud command. Output is parsed JSON.
vercel-skill
Deploy sites and apps to Vercel, inspect deployments, stream logs, and manage projects/env/domains via the Vercel CLI. Deploy a directory and get back the live deployment URL; everything else the CLI supports is available through the custom command passthrough.
ov-server-operate
Operate and maintain OpenViking server - configure, install, start, stop, and cleanup the server. Use when need to setup or manage OpenViking service deployment.
cloud-image-bake
Bake, select, prove, and safely retire a Cloud Worker image with crabbox and config one-liners.
vercel-deploy
Deploy applications and websites to Vercel. Use this skill when the user requests deployment actions such as "Deploy my app", "Deploy this to production", "Create a preview deployment", "Deploy and give me the link", or "Push this live". No authentication required - returns preview URL and claimable deployment link.