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 agentmods add skills/arnosdeus/agent-toolkit/performance-reviewnpx skills add Arnosdeus/agent-toolkit --skill performance-reviewgit clone --depth 1 https://github.com/Arnosdeus/agent-toolkitWrote 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/arnosdeus/agent-toolkit/performance-review)<a href="https://agentmods.dev/skills/arnosdeus/agent-toolkit/performance-review"><img src="https://agentmods.dev/badge/skills/arnosdeus/agent-toolkit/performance-review.svg" alt="Measured on agentmods" 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 | $0.00030 | $0.00178 |
| Opus 5 | $0.00015 | $0.00089 |
| Sonnet 5 | $0.00006 | $0.00036 |
| Haiku 4.5 | $0.00003 | $0.00018 |
Grade A, and why
performance-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 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.
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
Performance Review
Procedure and output
Establish a baseline or reproducible cost before recommending a change. Report
BLOCKER, MAJOR, MINOR, or NOTE findings with metric, trace, query, or
code evidence, plus the smallest justified remediation.
Look for measurable bundle and dependency cost, unnecessary re-renders, requests, missing caching, image inefficiency, inappropriate lazy loading or code splitting, slow queries/N+1 patterns, API latency, memory growth, polling, and loading behavior. Prefer traces, metrics, profiling, query plans, or reproducible measurements. Do not recommend speculative optimization; state the measurement needed when evidence is unavailable.
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 First seen · 20 lines · 30 tokens per session scan A 9ed05ab68c84
performance-review is a skill published in the GitHub repository Arnosdeus/agent-toolkit (2 stars, last pushed 10d ago), licensed MIT. It adds 30 tokens to every session and 178 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 2026-08-31.
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