diff --git a/pyproject.toml b/pyproject.toml
index d22d6ec..aa13915 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "openarmature"
-version = "0.9.0rc1"
+version = "0.9.0"
 description = "Workflow framework for LLM pipelines and tool-calling agents."
 readme = "README.md"
 requires-python = ">=3.12"
diff --git a/src/openarmature/AGENTS.md b/src/openarmature/AGENTS.md
index 925ff55..1780a16 100644
--- a/src/openarmature/AGENTS.md
+++ b/src/openarmature/AGENTS.md
@@ -1,6 +1,6 @@
 # OpenArmature — Agent documentation
 
-*This is the agent guide bundled with the openarmature Python package, version 0.9.0rc1 (spec v0.22.1). For the full docs site see [openarmature.ai](https://openarmature.ai). For the canonical spec text see [openarmature.org/capabilities](https://openarmature.org/capabilities/). For project-specific conventions for the code you're editing, see the host project's `AGENTS.md` or `CLAUDE.md`.*
+*This is the agent guide bundled with the openarmature Python package, version 0.9.0 (spec v0.22.1). For the full docs site see [openarmature.ai](https://openarmature.ai). For the canonical spec text see [openarmature.org/capabilities](https://openarmature.org/capabilities/). For project-specific conventions for the code you're editing, see the host project's `AGENTS.md` or `CLAUDE.md`.*
 
 ## TL;DR
 
diff --git a/src/openarmature/__init__.py b/src/openarmature/__init__.py
index b8f2e28..de1c070 100644
--- a/src/openarmature/__init__.py
+++ b/src/openarmature/__init__.py
@@ -24,5 +24,5 @@
    sessions opening the project find the bundled docs automatically.
 """
 
-__version__ = "0.9.0rc1"
+__version__ = "0.9.0"
 __spec_version__ = "0.22.1"
diff --git a/tests/test_smoke.py b/tests/test_smoke.py
index 60661b2..57b49d5 100644
--- a/tests/test_smoke.py
+++ b/tests/test_smoke.py
@@ -8,7 +8,7 @@
 
 
 def test_package_versions() -> None:
-    assert openarmature.__version__ == "0.9.0rc1"
+    assert openarmature.__version__ == "0.9.0"
     assert openarmature.__spec_version__ == "0.22.1"
 
 
diff --git a/uv.lock b/uv.lock
index f65b6d4..e404a94 100644
--- a/uv.lock
+++ b/uv.lock
@@ -885,7 +885,7 @@ wheels = [
 
 [[package]]
 name = "openarmature"
-version = "0.9.0rc1"
+version = "0.9.0"
 source = { editable = "." }
 dependencies = [
     { name = "httpx" },