> For the complete documentation index, see [llms.txt](https://docs.itheum.io/product-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.itheum.io/product-docs/pre-aithra/pre-aithra-developers.md).

# \[PRE-Aithra] Developers

{% hint style="warning" %}
Since Oct 2025, the Itheum protocol was upgraded to V3 (codename Itheum Aithra), the following section are related to **Developers** components that were PRE-Aithra, i.e. they are no longer actively supported but are maintained for historic reference.
{% endhint %}


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