# Split

> Data splitting techniques and strategies reference — partitioning datasets, string splitting, file splitting, and ML train/test splits. Use when dividing data, chunking files, or designing data partitioning strategies.

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

---


# Split — Data Splitting Reference

Quick-reference skill for data splitting techniques, partitioning strategies, and practical patterns.

## When to Use

- Splitting strings by delimiters, patterns, or fixed widths
- Partitioning datasets for ML training/validation/test
- Dividing large files into manageable chunks
- Database sharding and horizontal partitioning
- Understanding split strategies for distributed systems

## Commands

### `intro`

```bash
scripts/script.sh intro
```

Overview of data splitting — concepts, common use cases, and terminology.

### `string`

```bash
scripts/script.sh string
```

String splitting techniques — delimiters, regex, fixed-width, tokenization.

### `file`

```bash
scripts/script.sh file
```

File splitting methods — by size, lines, patterns, and round-robin.

### `dataset`

```bash
scripts/script.sh dataset
```

ML dataset splitting — train/val/test, stratified, time-series, k-fold.

### `database`

```bash
scripts/script.sh database
```

Database partitioning — horizontal, vertical, hash, range, and list.

### `strategies`

```bash
scripts/script.sh strategies
```

Splitting strategies for distributed systems — consistent hashing, sharding keys.

### `examples`

```bash
scripts/script.sh examples
```

Practical split examples across languages and tools.

### `pitfalls`

```bash
scripts/script.sh pitfalls
```

Common pitfalls and best practices when splitting data.

### `help`

```bash
scripts/script.sh help
```

### `version`

```bash
scripts/script.sh version
```

## Configuration

| Variable | Description |
|----------|-------------|
| `SPLIT_DIR` | Data directory (default: ~/.split/) |

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