# Sn Da Large File Analysis (agent skill)

> Sn Da Large File Analysis is an agent skill (a SKILL.md file) from OpenSenseNova/SenseNova-Skills. 万行以上 Excel 数据集的高性能分析引擎。提供 openpyxl readonly 流式读取（iterrows 支持 10 万行以上）、Parquet 转换加速、内存优化、分块处理和大文件写入模式。遇到以下任一情况就主动使用本 skill：①数据行数 ≥ 10k（由 sn-da-excel-workflow 的行数评估步骤触发）；②用户出现触发词：大文件 / 大数据量 / 性能优化 /. It works with Claude Code and has 5,743 GitHub stars across a repository of 4 listed skills.

万行以上 Excel 数据集的高性能分析引擎。提供 openpyxl readonly 流式读取（iterrows 支持 10 万行以上）、Parquet 转换加速、内存优化、分块处理和大文件写入模式。遇到以下任一情况就主动使用本 skill：①数据行数 ≥ 10k（由 sn-da-excel-workflow 的行数评估步骤触发）；②用户出现触发词：大文件 / 大数据量 / 性能优化 / 内存不足 / OOM / 百万行 / 十万行 / 流式读取 / Parquet / 分块处理 / large file / big data / streaming read / chunked processing；③直接使用 pd.read_excel() 导致超时或内存溢出；④用户明确要求对大规模数据集进行高性能处理。仅不用于：小于 10k 行的常规 Excel 分析（使用 sn-da-excel-workflow 即可）。 When total rows >= 10,000, you MUST use the methods in this skill.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/OpenSenseNova/SenseNova-Skills |
| Skill path | skills/sn-da-large-file-analysis/SKILL.md |
| Skill name | sn-da-large-file-analysis |
| GitHub stars | 5,743 |
| Installs on skills.sh | not listed |
| License | MIT |
| Skills in repo | 4 |
| Plugin marketplace | no |
| Official | no |
| Works with | Claude Code |
| Category | Data & analysis |
| Last commit | Sep 17, 2026 |

## Add this skill

### Claude Code

```sh
git clone --depth 1 https://github.com/OpenSenseNova/SenseNova-Skills.git
cp -r SenseNova-Skills/skills/sn-da-large-file-analysis ~/.claude/skills/sn-da-large-file-analysis   # personal, or .claude/skills in a project
```

In the Claude apps, zip the skill folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

### ChatGPT / Codex

```sh
git clone --depth 1 https://github.com/OpenSenseNova/SenseNova-Skills.git
cp -r SenseNova-Skills/skills/sn-da-large-file-analysis .agents/skills/sn-da-large-file-analysis   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/OpenSenseNova/SenseNova-Skills.git
cp -r SenseNova-Skills/skills/sn-da-large-file-analysis .cursor/skills/sn-da-large-file-analysis   # project; ~/.cursor/skills for all projects
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

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Canonical page: https://appsgit.com/skills/opensensenova-sn-da-large-file-analysis
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