Module format 

Save file format, slot management, and the SaveManager.

File layout

[magic: 4 bytes "SAVE"]
[header length: u32 little-endian]
[header JSON bytes]
[snapshot length: u32 little-endian]
[snapshot JSON bytes]
[checksum: u32 little-endian] — CRC-32-style over header+snapshot bytes

The format is intentionally simple and human-inspectable (the JSON sections are UTF-8 text). No compression or encryption is applied by default.

Structs

SaveFile

A complete in-memory representation of a save file.

SaveHeader

Metadata stored at the top of a save file.

SaveManager

Manages multiple save slots under a single directory.

SaveSlot

A single numbered save slot. header is None if the slot is empty.

Enums

SaveError

Errors that can occur during save file operations.

Constants

CURRENT_FORMAT_VERSION

The current save file format version.

SAVE_MAGIC

The four magic bytes at the start of every save file.

Functions

compute_checksum

Compute a simple 32-bit checksum over data.