v0.10.0

See CHANGELOG.md for details.

v0.9.0

See CHANGELOG.md for details.

v0.8.1

See CHANGELOG.md for details.

v0.8.0

See CHANGELOG.md for details.

v0.7.0

See CHANGELOG.md for details.

v0.6.1

See CHANGELOG.md for details.

v0.6.0

See CHANGELOG.md for details.

v0.5.2

See CHANGELOG.md for details.

lifecore_ros2 v0.4.0 — first public release

lifecore_ros2 is a minimal lifecycle composition library for ROS 2 Jazzy — no hidden state machine.

This is the first public release of lifecore_ros2. It establishes a small, predictable
surface for composing lifecycle-aware ROS 2 nodes without layering a hidden state machine
on top of native ROS 2 lifecycle semantics.

Supported baseline

• Python 3.12 or newer
• ROS 2 Jazzy
• rclpy is required at runtime and is expected to come from the system ROS installation;
  it is intentionally not declared as a PyPI dependency

Included in this release

Public API (re-exported from lifecore_ros2):

• LifecycleComponentNode — lifecycle node that owns and drives registered components as
  native ROS 2 managed entities
• LifecycleComponent — base class for lifecycle-aware components (abstract by
  convention); propagates transitions through _on_configure, _on_activate,
  _on_deactivate, _on_cleanup, _on_shutdown, _on_error
• TopicComponent — base class for topic-oriented components; allocates ROS pub/sub
  during configure, releases during cleanup
• LifecyclePublisherComponent[MsgT] — generic publisher gated by activation state
• LifecycleSubscriberComponent[MsgT] — generic subscriber whose on_message callback
  is gated by activation state
• when_active — decorator that guards component methods on activation state
• LifecoreError and typed boundary-violation subclasses: RegistrationClosedError,
  DuplicateComponentError, ComponentNotAttachedError, ComponentNotConfiguredError

Examples: examples/minimal_node.py, examples/minimal_publisher.py,
examples/minimal_subscriber.py, examples/telemetry_publisher.py,
examples/composed_pipeline.py.

Documentation: getting-started guide, architecture overview, recommended patterns
and anti-patterns, migration notes from raw rclpy, FAQ, and a Sphinx-buildable API
reference under docs/.

Quality baseline: Ruff formatting and linting, Pyright strict mode for the core
package, and a pytest suite covering nominal transitions, edge transitions, activation
gating, failure propagation, and resource handling.

Known limitations

• The public API is in the 0.x series — experimental stability level; minor bumps may
  include breaking changes
• composed_pipeline.py demonstrates multi-component composition inside a single node;
  multi-node or domain-specific examples live in the planned companion repository
• The MsgT type parameter on topic components is unbounded by design — no stable ROS 2
  message base class is exported by rosidl to constrain it without coupling
• No companion examples repository (lifecore_ros2_examples) ships with this release
• Lifecycle observability beyond standard rclpy logging (e.g. /diagnostics
  integration) is out of scope for the core library

Links

• README
• Documentation
• CHANGELOG
• ROADMAP