Home Assistant Integration Knowledge

It knows where integration code and tests live, enforces rules like not making polling intervals user-configurable, and steers you toward platinum and gold quality scale integrations as examples. The guidelines are opinionated in a good way, like preferring direct dictionary indexing over .get() so bad assumptions fail fast. It also covers platform-specific rules for diagnostics and repairs. Useful if you're contributing to the home-assistant/core repo or just want your custom integration to follow the same patterns the core team uses.