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DeviceInfo is now a dataclass
DeviceInfo and ChildDeviceInfo are no longer TypedDicts. They are dataclasses with typed fields, which are read and written as attributes.
4 min readNew entity lifecycle hooks
Two new entity lifecycle hooks have been added: async_prepare_to_add_to_hass and async_entity_id_changed.
7 min read
Abílio Costa5posts
Aidan Timson1post
Allen Porter4posts
Artur Pragacz4posts
Bram Kragten6posts
davet20011post
Davide Perteghella1post
epenet24posts
Erik Montnémery68posts
Erwin Douna2posts
Franck Nijhof20posts
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Jan Čermák2posts
Jan-Philipp Benecke8posts
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Josef Zweck6posts
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More from 2026 , 57 posts
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Update entities can customize update availability
As of Home Assistant Core 2026.11, update entities can override the new has_update property to determine whether an update is available.
1 min readNew unit of measurement selector
A new UnitOfMeasurementSelector lets users pick a unit of measurement in a config, options, or subentry flow, and in blueprints.
4 min readClimate entities now expose their temperature unit
As of Home Assistant Core 2026.11, climate entities have a new temperature_unit state attribute, and the temperature properties integrations implement have been renamed with a native_ prefix.
2 min readWater heater entities now expose their temperature unit
As of Home Assistant Core 2026.11, water heater entities have a new temperature_unit state attribute, and the temperature properties integrations implement have been renamed with a native_ prefix.
2 min readRemoval of RestoreStateData.last_states
As of Home Assistant Core 2026.11, states stored by the restore state helper are indexed by the entity's entity registry ID instead of by its entity ID.
1 min readProbatio is our validation engine
Since Home Assistant Core 2026.9, schema validation runs on Probatio instead of voluptuous.
4 min readShared config flow abort reasons are translated centrally
As of Home Assistant Core 2026.10, the homeassistant integration can translate abort reasons that every integration words the same way.
2 min readLLM tools return a ToolResult and declare their integration
As of Home Assistant Core 2026.10, an LLM tool returns an llm.ToolResult instead of a plain JSON object.
1 min readUse Config Entry exceptions in integration migration method
Integration migration async_migrate_entry method can now raise config entry exceptions instead of only being limited to return False.
2 min readDeviceEntry.config_entriesdeprecation is now enforcedThe device registry's multi-config-entry compatibility properties — DeviceEntry.config_entries, DeviceEntry.config_entries_subentries and DeviceEntry.primary_config_entry — were announced as deprecated in Devices are restricted to a single config entry and at most one subentry, but reading them was still silent.
4 min readNew stop action and idle activity for lawn mowers
As of Home Assistant Core 2026.10, LawnMowerEntity supports a stop action and an IDLE activity.
1 min readOAuth2 error handling moved into the helper
As of Home Assistant Core 2026.10, the OAuth2 helper raises exceptions that config entry setup already understands, so integrations no longer translate OAuth2 failures themselves.
2 min readNew device and state class selectors
New selectors are available to choose a device class or sensor state class.
2 min readDeprecating modbus.get_hub in favor of async_get_unit
As of Home Assistant Core 2026.10, modbus.get_hub is deprecated. It will be removed in Home Assistant Core 2027.10.
1 min readConfigurator integration is now deprecated
The Configurator integration has been deprecated and will be removed in Home Assistant 2027.10.
1 min readMore device registry deprecations, new helpers and validation
This is a follow-up to Devices are restricted to a single config entry and at most one subentry, and covers additional device registry deprecations, a few new helper methods, and some stricter validation that landed after that post.
9 min readDevice registry WebSocket API changes
This post describes changes to the device registry WebSocket API — the commands and device serialization consumed by the frontend, custom cards, and other WebSocket clients.
6 min readFrontend component updates in 2026.8
We added ha-split-panel, a Home Assistant wrapper around the Web Awesome split panel component.
3 min readStandard event types for button event entities
Button event entities now have a set of standard event types, provided by the new ButtonEventType enum.
2 min readDevices are restricted to a single config entry and at most one subentry
A device is now owned by a single config entry, and by a single (or no) config subentry.
11 min readIntroducing the Open Home Foundation AI Policy
AI-assisted development has become part of daily reality for many contributors, and for us as maintainers too.
1 min readModernizing Modbus in Home Assistant
Modbus is everywhere in the modern home: solar inverters, energy meters, heat pumps, and all kinds of industrial equipment that has found its way indoors.
3 min readMedia sources can now be searched
Media sources can now implement search. By adding an async_search_media method to your MediaSource, users can search through your media directly from the media browser.
1 min readDeprecation of the home_assistant_start flag of async_initialize_triggers
The dedicated home_assistant_start flag of async_initialize_triggers is deprecated and will be removed in Home Assistant Core 2027.8.
1 min readIntroducing new unit enumerators
As of Home Assistant Core 2026.7, the following unit constants are deprecated and replaced by a corresponding enum:
1 min readFrontend component updates in 2026.7
ha-button, ha-button-toggle-group, and ha-slider now use the short Web Awesome size names.
2 min readChanges to device tracker entity models
There have been multiple recent changes to the device tracker entity model:
2 min readCustom card suggestions in the card picker
As of Home Assistant 2026.6, custom cards can show up as suggestions in the card picker.
1 min readFrontend component updates in 2026.6
ha-radio was removed from our codebase, we use the webawesome based ha-radio-group with ha-radio-option now.
1 min readDeprecation of advanced mode in data entry flow
User profile advanced mode is going away, which means integrations can no longer check if advanced mode is enabled or not in data entry flows.
1 min readBrowseMediaSource: domain is now required
The BrowseMediaSource class in the media_source integration has been tightened up.
1 min readChanges to the condition and script APIs
The condition and script APIs have been changed.
2 min readFormat entity names in custom cards
As of Home Assistant 2026.4, the hass object exposes a formatEntityName helper. It is the same function used by the built-in cards (tile card, entity rows, ...) to compute the display name of an entity from its registry context (entity, device, area, floor).
1 min readMQTT publish API changes
In the future, the MQTT publish API will require explicit values for qos and retain.
1 min readMQTT publish API supports message expiry interval
The MQTT publish API now supports setting a message expiry interval. Previously, retained messages were stored by the broker until they were replaced or explicitly cleared.
1 min readDeprecating config entry listener with reloading methods in config flow
As of Home Assistant Core 2026.6, using a config entry listener together with any reloading methods in a config flow is deprecated and will result in an error from 2026.12.
1 min readFrontend component updates in 2026.5
A new component replaces mwc-progress-bar in our codebase and is fully themeable.
2 min readFrontend context groups, new context decorators and deprecated contexts
Last release we introduced the lazy context and we wanted to use hass context and lazy context more in favor of passing the hass object.
1 min readSerious about serial: migrating from pyserial to serialx
Existing integrations and libraries communicating with serial ports should migrate from pyserial, pyserial-asyncio, and pyserial-asyncio-fast to serialx.
1 min readNew radio frequency entity platform for RF device integrations
Home Assistant now has a radio_frequency entity platform that decouples RF transceiver hardware from the devices it controls.
2 min readRegistering custom dashboard strategies
As of Home Assistant 2026.5, you can now register custom dashboard strategies, just as you can with custom cards, making them easier to discover and add using the new dashboard dialog under the Community dashboards section.
1 min readDeprecation of legacy device tracker platform API
The legacy (non-config-entry) device tracker platform API is deprecated and will be removed in the Home Assistant 2027.5 release.
3 min readStandard event type for doorbell event entities
Doorbell event entities now have a standard ring event type. Integrations that use EventDeviceClass.DOORBELL must include DoorbellEventType.RING in their event_types list.
1 min readEntity IDs with mismatched domains are deprecated
Integrations that set entity_id directly on an entity will now be validated to ensure the domain portion matches the platform's domain.
1 min readMigrating app builds to Docker BuildKit
The legacy home-assistant/builder container and the old home-assistant/builder GitHub Action have been retired.
3 min readNew infrared entity platform for IR device integrations
Home Assistant now has an infrared entity platform that decouples IR emitter hardware from the devices they control.
2 min readFrontend component updates 2026.4
We keep migrating our Material Design based components to Web Awesome based. This time we migrated the input components, which leads to an API change but the look and feel stays the same for now.
1 min readFrontend new way of dialogs
Each dialog managed by the dialog manager was only opened once and stayed in the DOM for the lifetime of the application.
1 min readFrontend lazy context
In the Home Assistant frontend, a Context is a way to share data across the component tree without explicitly passing it through every level as a property.
2 min readBackup agents can now report upload progress
The BackupAgent.async_upload_backup method now receives a new on_progress callback parameter.
1 min readCustom integrations can now ship their own brand images
Starting with Home Assistant 2026.3, custom integrations can include their own brand images (icons and logos) directly in the integration directory.
2 min readRemove deprecated light features
In October 2022, Home Assistant migrated the preferred color temperature unit from mired to kelvin.
2 min readChanges in OAuth 2.0 helper error handling
Starting as of 2026.3, we're enhancing how the OAuth 2.0 helper handles token request and refresh token failures.
2 min readReconfiguration support for webhook helper
Integrations that use the webhook config flow helper (homeassistant.helpers.config_entry_flow.register_webhook_flow) now support reconfiguration.
1 min readasync_listen in Labs is deprecated
The async_listen helper in the labs integration has been deprecated in favor of async_subscribe_preview_feature.
1 min readReplacing pre-commit with prek
By replacing pre-commit with prek we can increase the performance of our checks.
1 min readSolving pyserial-asyncio blocking the event loop
Starting in 2026.7, installation of pyserial-asyncio will be blocked in Home Assistant.
1 min read