Bump version to 2026.9.0.dev0 (#177558)

.github/workflows/ci.yaml

@@ -39,7 +39,7 @@ on:
 env:
   CACHE_VERSION: 4
   MYPY_CACHE_VERSION: 1
-  HA_SHORT_VERSION: "2026.8"
+  HA_SHORT_VERSION: "2026.9"
   ADDITIONAL_PYTHON_VERSIONS: "[]"
   # 10.3 is the oldest supported version
   # - 10.3.32 is the version currently shipped with Synology (as of 17 Feb 2022)

homeassistant/const.py

@@ -22,7 +22,7 @@ if TYPE_CHECKING:
 
 APPLICATION_NAME: Final = "HomeAssistant"
 MAJOR_VERSION: Final = 2026
-MINOR_VERSION: Final = 8
+MINOR_VERSION: Final = 9
 PATCH_VERSION: Final = "0.dev0"
 __short_version__: Final = f"{MAJOR_VERSION}.{MINOR_VERSION}"
 __version__: Final = f"{__short_version__}.{PATCH_VERSION}"

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "homeassistant"
-version = "2026.8.0.dev0"
+version = "2026.9.0.dev0"
 license = "Apache-2.0"
 license-files = ["LICENSE*", "homeassistant/backports/LICENSE*"]
 description = "Open-source home automation platform running on Python 3."