- Introduce private v4 compatibility surface using
_legacy_api.py, _legacy_runtime.py, _legacy_loader.py plus new
_legacy_context.py and _legacy_star.py to centralize legacy adapters
while keeping public APIs thin.
- Extend InitializeOutput to carry protocol_version for negotiated
protocol, enabling runtime to adapt to the chosen v4 version.
- Add lightweight legacy support for Star/Context via new LegacyStar and
LegacyContext shims and expose legacy API through the aggregate
_legacy_api entry point.
- Ensure legacy loader preserves class declaration order by iterating
module.__dict__ instead of relying on alphabetical sorting.
- Add tests: protocol_version handling in InitializeOutput, legacy
main component order preservation, and embedded-newline framing in
transport tests.
- Introduced platform client documentation in `docs/v4/clients/platform.md` detailing methods for sending messages, images, and managing group members.
- Added example plugins for LLM chat and database functionalities in `docs/v4/examples/README.md`, `docs/v4/examples/llm-chat/README.md`, and `docs/v4/examples/database/README.md`.
- Enhanced quickstart guide with links to new documentation and example plugins.
- Implemented runtime contract tests to ensure compatibility of public capabilities and hooks.
