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 znlgis/opengis-skills --skill npoigit clone --depth 1 https://github.com/znlgis/opengis-skillsWrote 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/znlgis/opengis-skills/npoi)<a href="https://agentmods.dev/skills/znlgis/opengis-skills/npoi"><img src="https://agentmods.dev/badge/skills/znlgis/opengis-skills/npoi/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/znlgis/opengis-skills/npoi"><img src="https://agentmods.dev/badge/skills/znlgis/opengis-skills/npoi.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 | $0.00085 | $0.03753 |
| Opus 5.5 | $0.00034 | $0.01501 |
| Sonnet 5.5 | $0.00017 | $0.00751 |
| Haiku 4.5 | $0.00009 | $0.00375 |
Grade A, and why
npoi 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 today.
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 — 362 lines — stays where its author put it; the contents beside it link to each section on GitHub.
项目地址： https://github.com/nissl-lab/npoi
NuGet：
NPOI最新版本： 2.8.1（2026-10-07 仓库最后提交；截至 2026-10，NuGet 实测）
官方文档： https://github.com/nissl-lab/npoi/wiki
许可证： Apache-2.0
注意（OSMF）： 自 2.8.0 起 NuGet 包附带 OSMF EULA，年收入超过 1 万美元的组织/商业用户需通过 GitHub Sponsors 支付月度维护费；初创、自由职业者与业余项目免费。详见 https://github.com/nissl-lab/npoi 与 https://opensourcemaintenancefee.org/consumers/。
概述
NPOI 主要能力：
- xls（HSSF） / xlsx（XSSF） / 流式 xlsx（SXSSF） 读写
- 公式计算：
FormulaEvaluator - 样式：字体、边框、对齐、数据格式、条件格式
- 图表 / 图片 / 批注
- Word
.doc（HWPF） / Word.docx（XWPF） - PowerPoint
.ppt/.pptx - 跨平台：.NET Framework / .NET 6+ / Linux / macOS
大文件写入推荐 SXSSF（流式），可处理百万行 Excel；大文件读取推荐 EventModel（XSSF SAX）。
安装
方式一：dotnet CLI
dotnet add package NPOI
方式二：PackageReference
<ItemGroup>
<PackageReference Include="NPOI" Version="2.8.1" />
</ItemGroup>
方式三：包管理器控制台
Install-Package NPOI -Version 2.8.1
验证安装
dotnet list package | grep -i npoi
主要命名空间：
NPOI.HSSF.UserModel— xlsNPOI.XSSF.UserModel— xlsxNPOI.XSSF.Streaming— 流式 xlsxNPOI.SS.UserModel— 通用接口（IWorkbook / ISheet / IRow / ICell）NPOI.SS.Util— CellRangeAddress、WorkbookUtil
核心 API 速查
| 对象 | 入口 | 说明 |
|---|---|---|
| 工作簿 | new XSSFWorkbook() / new HSSFWorkbook() / new SXSSFWorkbook(rowAccessWindow) |
xlsx / xls / 流式写大文件 |
| 读任意格式 | WorkbookFactory.Create(stream) |
按魔数自动识别 xls/xlsx |
| 表 | wb.CreateSheet(name) / wb.GetSheetAt(i) / wb.GetSheet(name) |
|
| 行 / 单元格 | sh.CreateRow(i) / row.CreateCell(j) |
|
| 单元格值 | cell.SetCellValue(...) / cell.CellType |
枚举 CellType.String/Numeric/Boolean/Formula/Blank |
| 样式 | wb.CreateCellStyle() + wb.CreateFont() + wb.CreateDataFormat() |
|
| 公式求值 | wb.GetCreationHelper().CreateFormulaEvaluator() |
读公式结果用它，不要自己解析 |
| Word | XWPFDocument / XWPFParagraph |
.docx 读写 |
写入 Excel（xlsx）
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.
- today Changed · +31 lines · +25 tokens per session 29eb3884008e
- 13d ago Changed · +39 lines 890b746d575b
- 1mo ago Changed · +2 lines a79bae27653b
- 1mo ago Changed 249751a7447f
- 1mo ago Changed 16725cb47f99
- 1mo ago First seen · 290 lines · 60 tokens per session scan A 11a2d1964a93
npoi is a skill published in the GitHub repository znlgis/opengis-skills (75 stars, last pushed yesterday), licensed MIT. It adds 85 tokens to every session and 3,753 once invoked, about $0.0003 per session on Opus 5.5. 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.
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