> ## Documentation Index
> Fetch the complete documentation index at: https://stellaraddresskit.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Spec Overview

> Why the spec is the most important part of the project.

Stellar Address Kit is a **spec-first** project. This means that the shared `vectors.json` file is the ultimate source of truth for how all packages must behave.

## What is vectors.json?

A collection of 100+ test cases that cover every possible combination of:

* G, M, and C addresses.
* Valid and invalid checksums.
* All memo types (ID, TEXT, HASH, RETURN).
* Numeric and non-numeric text values.
* Edge cases like `uint64` max value and JavaScript precision "canaries".

## Shared Versioning

The `spec_version` field in `vectors.json` governs the versioning of all three implementation packages. If the spec version jumps to `2.0.0`, all packages must jump to `2.0.0` to maintain compliance.