developers.home-assistant/docs/development_index.md

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Starting with Development	Introduction

Home Assistant is built from the ground up to be easily extensible using integrations. In this section, we're focusing on how to develop integrations.

Before you start, make sure that you have read up on the Home Assistant architecture so that you are familiar with the concepts that make up Home Assistant.

If you run into trouble following this documentation, don't hesitate to join our #devs_core channel on Discord.