AI News Brief: March 2, 2026

GitHub Copilot Workspace Adds Multi-Repository Context

GitHub announced that Copilot Workspace now supports contextual awareness across up to 10 linked repositories simultaneously. The feature uses an improved indexing system that maintains sub-100ms query times even with codebases exceeding 5M lines. Early access users report 40% fewer context-switching errors when working on microservices architectures.

Anthropic Releases MCP 2.1 with Streaming Tool Calls

The Model Context Protocol specification received its first major update of 2026, introducing bidirectional streaming for tool execution. MCP 2.1 enables real-time progressive results from long-running tools, significantly improving responsiveness for data analysis and code compilation tasks. Over 200 MCP servers have already updated to support the new streaming capabilities.

LangGraph Studio Goes Open Source

LangChain announced that LangGraph Studio, their visual agent debugging environment, is now fully open source under Apache 2.0. The release includes the complete IDE, time-travel debugging features, and the graph visualization engine that previously required an enterprise license. The company will continue offering hosted services while making the core tooling freely available.

Cursor Unveils "Shadow Mode" for Training Custom Coding Models

Cursor introduced Shadow Mode, which records developers' coding decisions and file edits to create personalized fine-tuning datasets. Users can opt-in to train project-specific models that learn team conventions, architecture patterns, and preferred libraries. The feature processes all data locally and generates training-ready datasets compatible with popular fine-tuning frameworks.