fix

Use default environment even when `env` is provided(modelcontextproto…

…col#327)

Revert "refactor: reorganize message handling for better type safety …

…and clar…" (modelcontextprotocol#282)

This reverts commit 9d0f2da.

refactor: reorganize message handling for better type safety and clar…

…ity (modelcontextprotocol#239)

* refactor: improve typing with memory stream type aliases

Move memory stream type definitions to models.py and use them throughout
the codebase for better type safety and maintainability.

GitHub-Issue:modelcontextprotocol#201

* refactor: move streams to ParsedMessage

* refactor: update test files to use ParsedMessage

Updates test files to work with the ParsedMessage stream type aliases
and fixes a line length issue in test_201_client_hangs_on_logging.py.

Github-Issue:modelcontextprotocol#201

* refactor: rename ParsedMessage to MessageFrame for clarity

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

* refactor: move MessageFrame class to types.py for better code organization

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

* fix pyright

* refactor: update websocket client to use MessageFrame

Modified the websocket client to work with the new MessageFrame type,
preserving raw message text and properly extracting the root JSON-RPC
message when sending.

Github-Issue:modelcontextprotocol#204

* fix: use NoneType instead of None for type parameters in MessageFrame

🤖 Generated with [Claude Code](https://claude.ai/code)

* refactor: rename root to message

Release v1.2.0

Release v1.1.3

Changes:
- Add constructor for McpError to allow setting field
- Add version string parameter to Server constructor
- Fix text encoding params in STDIO client
- Fix deprecation warnings

Release v1.2.0rc1