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 ZJU-REAL/Easel --skill roi-calculatorgit clone --depth 1 https://github.com/ZJU-REAL/EaselWrote 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/zju-real/easel/roi-calculator)<a href="https://agentmods.dev/skills/zju-real/easel/roi-calculator"><img src="https://agentmods.dev/badge/skills/zju-real/easel/roi-calculator/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/zju-real/easel/roi-calculator"><img src="https://agentmods.dev/badge/skills/zju-real/easel/roi-calculator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00082 | $0.02271 |
| Opus 5 | $0.00041 | $0.01136 |
| Sonnet 5 | $0.00016 | $0.00454 |
| Haiku 4.5 | $0.00008 | $0.00227 |
Grade A, and why
roi-calculator 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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.
内容投放 ROI 计算器
根据用户提供的投放数据，计算标准营销效果指标，对比行业基准，输出结构化分析报告。
输入
用户提供以下字段的任意子集（缺失字段跳过其依赖指标）：
| 字段 | 代号 | 单位 | 必要性 |
|---|---|---|---|
| 投放费用 | ad_spend | CNY | 核心（为 0 或缺失时切换有机模式） |
| 曝光量 | impressions | 次 | 可选 |
| 点击量 | clicks | 次 | 可选 |
| 互动量 | engagements | 次（赞+评+转） | 可选 |
| 转化数 | conversions | 次 | 可选 |
| 客单价 | avg_order_value | CNY | 可选 |
| 内容制作成本 | production_cost | CNY | 可选，默认不计 |
两种模式：
- Mode A — 单活动分析：一组输入数据，输出完整指标卡片
- Mode B — 多活动对比：多组数据（表格或逐条），按 ROI 降序排列，横向对比
输出
指标计算（公式表）
以下指标仅在分母数据存在且非零时计算，否则标注"数据不足，已跳过"：
| 指标 | 公式 | 依赖字段 |
|---|---|---|
| CTR（点击率） | clicks / impressions | impressions, clicks |
| CPC（单次点击成本） | ad_spend / clicks | ad_spend, clicks |
| CPM（千次曝光成本） | (ad_spend / impressions) * 1000 | ad_spend, impressions |
| CPE（单次互动成本） | ad_spend / engagements | ad_spend, engagements |
| 转化率 | conversions / clicks | conversions, clicks |
| CPA（单次转化成本） | ad_spend / conversions | ad_spend, conversions |
| 营收 | conversions * avg_order_value | conversions, avg_order_value |
| ROAS（广告支出回报率） | revenue / ad_spend | revenue, ad_spend |
| 总成本 | ad_spend + production_cost | ad_spend（production_cost 缺失按 0） |
| 利润 | revenue - total_cost | revenue, total_cost |
| ROI | (revenue - total_cost) / total_cost | revenue, total_cost |
输出格式
Mode A — 单活动分析：
## 投放效果报告
### 基础数据
（用户提供的原始字段）
### 计算指标
| 指标 | 值 | 公式 | 基准对比 |
|------|----|------|----------|
| CTR | x% | clicks/impressions | ▲ 高于行业均值 |
| ... | | | |
### 基准对比图例
▲ 高于行业均值（表现良好）
▼ 低于行业均值（需关注）
≈ 接近行业均值（正常水平）
⚠ 显著偏离（超出基准 2 倍或低于 50%）
### 诊断
- 表现突出：（列出高于基准的指标及优势分析）
- 待优化：（列出低于基准的指标及具体改进方向）
- 综合评价：（一句话总结本次投放效果）
Mode B — 多活动对比：
## 多活动横向对比（按 ROI 降序）
| 活动 | 花费 | 营收 | ROI | ROAS | CTR | CPC | 综合评价 |
|------|------|------|-----|------|-----|-----|----------|
| ... | | | | | | | |
### 最优/最差活动分析
（对比 ROI 最高与最低活动的关键指标差异，找出差距来源）
### 预算分配建议
（基于各活动效率，建议预算向高 ROI 活动倾斜的比例）
### 优化建议
（针对低效活动的具体改进方向）
What ships with it
3 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.
- 11d ago First seen · 178 lines · 82 tokens per session scan A 03f7da4a41f3
roi-calculator is a skill published in the GitHub repository ZJU-REAL/Easel (794 stars, last pushed yesterday), licensed Apache-2.0. It adds 82 tokens to every session and 2,271 once invoked, about $0.0004 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 2026-08-30.
Other skills, from other repositories
python-run
Run and debug Python scripts in the project. Use when the user says "run python", "execute this script", "debug this py file", or wants to run/modify a .py file. Handles dependency checks, linting, execution, and error analysis.
roadtrip-navigator
Generate North American road-trip itineraries as a map-first, offline-friendly single-file HTML page. Plans around daily driving segments, overnight stops, fuel/EV-charging, national-park reservations (Recreation.gov / NPS), seasonal road closures, and timezone/border crossings — for executable, decision-ready trips.…
systematic-debugging
4-phase root cause debugging: understand bugs before fixing.
github-code-review
Review PRs: diffs, inline comments via gh or REST.
simplify-code
Sequential 3-lens cleanup of recent code changes.
skill-authoring
Author SKILL.md: frontmatter, structure, writing principles.