chore(release): v0.9.0-rc1

Cut the rc1 tag candidate for v0.9.0. Bump pyproject,
__version__, smoke-test assertion, and the bundled AGENTS.md
header to 0.9.0rc1. Rename CHANGELOG [Unreleased] to
[0.9.0] - 2026-05-25.

v0.9.0 absorbs proposals 0009 / 0010 / 0019 / 0025 / 0026 /
0027 / 0028 / 0029 / 0030 (spec pin v0.17.0 -> v0.22.1) plus
the agent-docs work (patterns docs section, bundled
AGENTS.md, openarmature.patterns API, openarmature CLI).
See the CHANGELOG [0.9.0] section for the full list.

Author: chris-colinsky

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to `openarmature-python` are documented in this file.
 
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). The package follows [Semantic Versioning](https://semver.org/); pre-1.0 minor bumps may carry behavioral changes per [spec governance](https://github.com/LunarCommand/openarmature-spec/blob/main/GOVERNANCE.md).
 
-## [Unreleased]
+## [0.9.0] — 2026-05-25
 
 ### Added
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "openarmature"
-version = "0.8.0"
+version = "0.9.0rc1"
 description = "Workflow framework for LLM pipelines and tool-calling agents."
 readme = "README.md"
 requires-python = ">=3.12"

src/openarmature/AGENTS.md

@@ -1,6 +1,6 @@
 # OpenArmature — Agent documentation
 
-*This is the agent guide bundled with the openarmature Python package, version 0.8.0 (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`.*
+*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`.*
 
 ## TL;DR
 

src/openarmature/__init__.py

@@ -24,5 +24,5 @@
    sessions opening the project find the bundled docs automatically.
 """
 
-__version__ = "0.8.0"
+__version__ = "0.9.0rc1"
 __spec_version__ = "0.22.1"

tests/test_smoke.py

@@ -8,7 +8,7 @@
 
 
 def test_package_versions() -> None:
-    assert openarmature.__version__ == "0.8.0"
+    assert openarmature.__version__ == "0.9.0rc1"
     assert openarmature.__spec_version__ == "0.22.1"