Getting it into your agent
There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.
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.
[](https://agentmods.dev/skills/joelhooks/joelclaw/joelclaw-system-check)<a href="https://agentmods.dev/skills/joelhooks/joelclaw/joelclaw-system-check"><img src="https://agentmods.dev/badge/skills/joelhooks/joelclaw/joelclaw-system-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/joelhooks/joelclaw/joelclaw-system-check"><img src="https://agentmods.dev/badge/skills/joelhooks/joelclaw/joelclaw-system-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00117 | $0.02805 |
| Opus 5 | $0.00059 | $0.01403 |
| Sonnet 5 | $0.00023 | $0.00561 |
| Haiku 4.5 | $0.00012 | $0.00281 |
Grade B, and why
joelclaw-system-check scanned grade B with 2 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 3d 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
tail -n 80 ~/.codex/session_index.jsonl Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
**PDS unreachable**: `curl -fsS http://localhost:9627/xrpc/_health` then `kubectl get deploy,svc,pods,pvc -n joelclaw | rg 'bluesky-pds|NAME'` (or if pod down: `kubectl rollout restart deployment/bluesky-pds -n joelclaw` The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
5 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.
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.
- 3d ago Changed · -8 lines scan D → B 90cf0ccc1d97
- 10d ago First seen · 221 lines · 117 tokens per session scan D 30fd70472c7c
joelclaw-system-check is a skill published in the GitHub repository joelhooks/joelclaw (63 stars, last pushed today), with no licence file. It adds 117 tokens to every session and 2,805 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it B with 2 findings (reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
System Healthcheck
Run a lightweight, non-destructive system healthcheck — disk usage, memory, CPU load, process count, hostname — and store a structured snapshot in session memory. Use when the user says "run a healthcheck", "check system health", "how's the server doing", "is everything ok", or asks for a status/diagnostics snapshot…
env-doctor
A diagnostic tool for checking a development environment, including runtimes, ports, and service health.
seedance-troubleshoot
This skill should be used when a Seedance 2.0 output is blurry, jittery, off-prompt, morphing, blocked, visually generic, unstable, desynced, inconsistent, or otherwise fails and needs root-cause diagnosis.
preset-health
Nested swiss-knife reference for saved-preset health checks. Read this when the human asks whether saved presets still work, which preset is expired or misconfigured, why system(action="presets") shows a bad connectivity status, or for a safe procedure to enumerate saved presets, classify each failure (expired key…
telemetry-inspect
Inspects the OrchestKit telemetry pipeline for the current project — lists all known telemetry files with write counts, sizes, schema status, growth trend, and orphan detection. Use when verifying the observability pipeline is healthy, debugging a missing writer, or auditing which files have schema locks vs. which are…
meraki-monitoring
Cisco Meraki monitoring and diagnostics (read-only) — device availability, loss and latency history, uplink status, live tool results, configuration change log, API request analytics via Cisco's official Meraki MCP. Use when checking Meraki device health, investigating uplink loss, or reviewing recent configuration…