RCS — Reconstructive Compression System

Version 1.0

RCS creates very small update files between two versions of the same data.

Instead of resending entire files or folders, RCS:

• uses an existing version as a base
• stores only the differences
• reconstructs the new version exactly

This makes updates dramatically smaller when most data stays the same.

What it’s good at

• folder-based software updates
• structured data with small changes
• large datasets with frequent versions

What it’s not for

• zip / dmg / pkg files
• encrypted or already-compressed data
• media formats (mp4, jpg, png)

Usage example

Create an update between two folders: rcs delta-folder old_version new_version update.rcs

Inspect the result: rcs stats update.rcs

Integrity

• SHA-256 verification
• byte-for-byte reconstruction
• base files are validated

License

MIT

## Contact Ryan_lambert@hotmail.co.uk