# Tool Zx7

> z88dk-zx7 / dzx7 ZX7 compression tools. Use when packing with ZX7.

- Skill: `feilipu/tool-zx7` (Agent Skill)
- Install (CLI): `npx skillmds@latest add feilipu/tool-zx7`
- Raw SKILL.md: https://api.skillmd.com/api/skills/feilipu/tool-zx7/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: feilipu (https://skillmd.com/u/feilipu)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/feilipu/tool-zx7

---


# Tool — zx7

| | |
|--|--|
| Binary | `z88dk-zx7` |
| Help | src/zx7 sources |
| Wiki (local draft) | `wiki/tools/Tool---zx7.md` |



## Condensed reference (from wiki / tree)

# Tool — z88dk-zx7

Host-side **ZX7** compressor. Companion decompressors live in the z80 libraries.

```text
Usage: z88dk-zx7 [-f] [-b] input [output.zx7]
  -f      Force overwrite of output file
  -b      Compress backwards
ZX7: Optimal LZ77/LZSS compression by Einar Saukas
```

Related: `z88dk-dzx7`, [compress_zx7](compress_zx7), [Decompression](Decompression).

## Related

- Driver front end: `tool-zcc`
- Measurement: `methodology-measure`, `tool-ticks`