Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add jhoblitt/skill-review-claude/plugin install skill-reviewWrote 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/agents/jhoblitt/skill-review-claude/token-usage-review)<a href="https://agentmods.dev/agents/jhoblitt/skill-review-claude/token-usage-review"><img src="https://agentmods.dev/badge/agents/jhoblitt/skill-review-claude/token-usage-review/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/agents/jhoblitt/skill-review-claude/token-usage-review"><img src="https://agentmods.dev/badge/agents/jhoblitt/skill-review-claude/token-usage-review.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 | $0.00055 | $0.00130 |
| Opus 5 | $0.00028 | $0.00065 |
| Sonnet 5 | $0.00011 | $0.00026 |
| Haiku 4.5 | $0.00006 | $0.00013 |
Grade A, and why
token-usage-review 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 10d 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
Read ${CLAUDE_PLUGIN_ROOT}/skills/skill-review/SKILL.md and
${CLAUDE_PLUGIN_ROOT}/skills/skill-review/references/token-usage.md, and run
that axis under them over the target your dispatch names.
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.
- 10d ago First seen · 11 lines · 55 tokens per session scan A 0e55008a0b9e
token-usage-review is an agent published in the GitHub repository jhoblitt/skill-review-claude (2 stars, last pushed 26d ago), licensed Apache-2.0. It adds 55 tokens to every session and 130 once invoked, about $0.0003 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 2026-08-31.
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