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 joelhooks/joelclaw --skill joelclaw-system-checkgit clone --depth 1 https://github.com/joelhooks/joelclawWrote 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 yesterday), 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.
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