feat: Introduce core system modules, eventing, observability, and middleware with comprehensive planning and tests.

Author: tercel

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.10.0] - 2026-03-07
+## [0.11.0] - 2026-03-08
 
 ### Added
 
@@ -16,6 +16,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **`APCore.use_before()`** — Add before function middleware via the unified client.
 - **`APCore.use_after()`** — Add after function middleware via the unified client.
 - **`APCore.remove()`** — Remove middleware by identity via the unified client.
+- **`APCore.on()`** / **`APCore.off()`** — Event subscription management via the unified client.
+- **`APCore.disable()`** / **`APCore.enable()`** — Module toggle control via the unified client.
 
 #### Global Entry Points (`apcore.*`)
 - **`apcore.stream()`** — Global convenience for streaming module calls.
@@ -26,11 +28,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **`apcore.use_before()`** — Global convenience for adding before middleware.
 - **`apcore.use_after()`** — Global convenience for adding after middleware.
 - **`apcore.remove()`** — Global convenience for removing middleware.
+- **`apcore.on()`** / **`apcore.off()`** — Global convenience for event subscription.
+- **`apcore.disable()`** / **`apcore.enable()`** — Global convenience for module toggle.
+
+#### Public API Exports
+- **`ModuleDisabledError`** — Error class for `MODULE_DISABLED` code, raised when a disabled module is called.
+- **`ReloadFailedError`** — Error class for `RELOAD_FAILED` code (retryable).
+- **`SchemaStrategy`** — Enum for schema resolution strategy (`yaml_first`, `native_first`, `yaml_only`).
+- **`ExportProfile`** — Enum for schema export profiles (`mcp`, `openai`, `anthropic`, `generic`).
+- **`EventEmitter`**, **`EventSubscriber`**, **`ApCoreEvent`** — Event system types now exported from top-level package.
 
 #### Error Hierarchy
 - **`FeatureNotImplementedError`** — New error class for `GENERAL_NOT_IMPLEMENTED` code (renamed from `NotImplementedError` to avoid Python stdlib clash).
 - **`DependencyNotFoundError`** — New error class for `DEPENDENCY_NOT_FOUND` code.
 
+### Fixed
+- README Access Control example now includes required `Executor` and `Registry` imports.
+- `pyproject.toml` repository/issues/changelog URLs now point to `apcore-python` (was incorrectly pointing to `apcore`).
+- CHANGELOG `[0.7.1]` compare link added (was missing from link references).
+
 ### Changed
 - APCore client and `apcore.*` global functions now provide full feature parity with `Executor`.
 
@@ -417,7 +433,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 [0.10.0]: https://github.com/aipartnerup/apcore-python/compare/v0.9.0...v0.10.0
 [0.9.0]: https://github.com/aipartnerup/apcore-python/compare/v0.8.0...v0.9.0
-[0.8.0]: https://github.com/aipartnerup/apcore-python/compare/v0.7.0...v0.8.0
+[0.8.0]: https://github.com/aipartnerup/apcore-python/compare/v0.7.1...v0.8.0
+[0.7.1]: https://github.com/aipartnerup/apcore-python/compare/v0.7.0...v0.7.1
 [0.7.0]: https://github.com/aipartnerup/apcore-python/compare/v0.6.0...v0.7.0
 [0.6.0]: https://github.com/aipartnerup/apcore-python/compare/v0.5.0...v0.6.0
 [0.5.0]: https://github.com/aipartnerup/apcore-python/compare/v0.4.0...v0.5.0

README.md

@@ -121,8 +121,9 @@ client.use(TracingMiddleware())
 ### Access control
 
 ```python
-from apcore import ACL, ACLRule
+from apcore import ACL, ACLRule, Executor, Registry
 
+registry = Registry()
 acl = ACL(rules=[
     ACLRule(callers=["admin.*"], targets=["*"], effect="allow", description="Admins can call anything"),
     ACLRule(callers=["*"], targets=["admin.*"], effect="deny", description="Others cannot call admin modules"),