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 dhaupin/vant --skill vant-skill-review-efficiencygit clone --depth 1 https://github.com/dhaupin/vantWrote 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/dhaupin/vant/vant-skill-review-efficiency)<a href="https://agentmods.dev/skills/dhaupin/vant/vant-skill-review-efficiency"><img src="https://agentmods.dev/badge/skills/dhaupin/vant/vant-skill-review-efficiency.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 5.1 | $0.00008 | $0.00543 |
| Opus 5 | $0.00004 | $0.00271 |
| Sonnet 5 | $0.00002 | $0.00109 |
| Haiku 4.5 | $0.00001 | $0.00054 |
Grade A, and why
review-efficiency scanned grade A with 1 finding 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 7d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl api.com // $$ What it actually says
Efficiency Review
Is this efficient?
The Question
What does it cost to run?
Money. Time. Resources.
What To Check
1. Compute
// What's the cost?
// CPU time per request
// Memory per request
| Resource | High | Fix |
|---|---|---|
| CPU | Loop complex | Optimize |
| Memory | Store all | Stream |
| GPU | N/A | N/A |
2. Network
// How many calls?
callAPI() // 1
callAPI() // 2
| Pattern | Issue | Fix |
|---|---|---|
| Multiple calls | Round trips | Batch |
| Large payloads | Bandwidth | Compress |
| No compression | Raw | gzip |
3. Storage
// What are we storing?
db.save(everything)
// vs
db.save(needed)
| Pattern | Issue | Fix |
|---|---|---|
| Save all | Extra storage | Save needed |
| Keep forever | bloat | TTL/expiry |
| No index | Slow reads | Index |
4. API Calls
# External APIs cost
curl api.com // $$
curl api.com // $$
| Check | Issue | Fix |
|---|---|---|
| No cache | Pay each time | Cache |
| Same call twice | Redundant | Dedup |
| No batching | N calls | Batch |
Cost Estimate
// Estimate: (calls × cost) + (compute × cost) + (storage × cost)
| Item | Calculation |
|---|---|
| API calls | calls × $0.001 |
| Compute | hours × $0.05 |
| Storage | GB × $0.02 |
Output
## Efficiency - [system]
### Compute
- [ESTIMATE] $[/hr]
- Issue: [pattern]
### Network
- [ESTIMATE] $[/hr]
- Issue: [pattern]
### Storage
- [ESTIMATE] $[/mo]
- Issue: [pattern]
### Total
- Estimated: $[/mo]
### Savings
1. [fix] saves $[/mo]
Role: Efficiency Reviewer
Input: System
Output: Cost?
Efficiency is money.
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.
- 7d ago First seen · 130 lines · 8 tokens per session scan A a65d459aafcb
review-efficiency is a skill published in the GitHub repository dhaupin/vant (9 stars, last pushed 8d ago), licensed MIT. It adds 8 tokens to every session and 543 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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