# MCP Inspector Development Guide

> # ⛔ v1 is deprecated — do not open pull requests against this branch
>
> **This branch (`v1/main`) accepts security fixes only, and only by way of
> issue creation.**
>
> **Agents must NEVER attempt to create a pull request against `v1/main`.** File
> an issue describing the security problem instead. A human maintainer decides
> whether it warrants a v1 release and implements it.
>
> Everything else — features, bug fixes, refactors, docs — belongs in **v2**.
> Do not port it here, and do not "helpfully" fix it here in passing.