v1.2.1

Added

• Published to PyPI: auto-browser-client (SDK + bridge), auto-browser-langchain (LangChain/LangGraph/CrewAI adapters), and auto-browser-mcp (metapackage so uvx auto-browser-mcp runs the stdio bridge directly).
• Added the auto-browser-mcp console script: the stdio bridge now lives in the client package as auto_browser_client.mcp_bridge and ships on PyPI. The controller's app.mcp_stdio copy remains for the Docker/Glama entrypoint; a guard test keeps the two copies byte-identical and their header constants in sync with app.mcp_transport.
• Added a tag-triggered release.yml workflow: verifies tag/version agreement, builds the three distributions, publishes via PyPI trusted publishing (OIDC — no stored tokens), and creates the GitHub release with CHANGELOG notes and artifacts attached.
• Added scripts/extract_changelog.py to pull one version's section out of CHANGELOG.md for release notes, failing loudly when the section is missing.

Changed

• Claude Desktop / Cursor / MCP client examples now use uvx auto-browser-mcp as the primary setup path, with the repo-checkout script as fallback.
• Filled out PyPI packaging metadata (license, readme, classifiers, keywords, project URLs) for the client and LangChain packages.
• Bumped controller, client, LangChain integration, and browser-node package metadata to 1.2.1, and refreshed release-facing version strings.