# Xan

> High-performance CSV processing with xan CLI for large tabular datasets, streaming transformations, and low-memory pipelines.

- Skill: `majiayu000/xan` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/xan`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/xan/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Data & Analytics
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/xan

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# xan

Use this skill when tabular work involves large CSV-like files and shell-oriented data pipelines.

## When to Use

- CSV/TSV files are large (size or rows) and Python/pandas style processing is too heavy.
- You need fast CLI operations such as `filter`, `sort`, `dedup`, `groupby`, `frequency`, `join`.
- You want low-memory streaming workflows in terminal pipelines.

## Boundaries

- Not for workbook semantics (`.xlsx` formula/layout preservation) — use `xlsx` or `excel-analysis`.
- Not for ML model training pipelines — use `data-ml` skills.
- This skill is a thin CLI wrapper; it does not implement custom parsing logic itself.

## Script

- Path: `scripts/xan.ps1`

### Examples

```powershell
powershell -ExecutionPolicy Bypass -File "$env:USERPROFILE\.codex\skills\xan\scripts\xan.ps1" count data.csv
powershell -ExecutionPolicy Bypass -File "$env:USERPROFILE\.codex\skills\xan\scripts\xan.ps1" filter "score > 0.8" data.csv
powershell -ExecutionPolicy Bypass -File "$env:USERPROFILE\.codex\skills\xan\scripts\xan.ps1" groupby category "sum(amount) as total" sales.csv
```