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3ca425416elangchain 1.4.2 ships `langchain.mcp`, whose MCPAdapter wraps fastmcp.Client and ClientGroup directly (resolve_tool, list_tools cache_mode, call_tool, Client.new, elicitation callbacks, MCPConfig, legacy and auto modes). The workflow now runs langchain's own MCP tests against the built wheels, and a new smoke drives MCPAdapter in-process, over stdio, MCPConfig, HTTP, SSE, a proxy, and a ClientGroup of a legacy HTTP server and a modern stdio server. Every smoke also runs through a FastMCP proxy in front of a stdio server and covers shapes this release cycle got wrong: `|` and non-ASCII template literals, comma-joined and exploded list query params, a float schema count, and a timed-out call followed by another on the same connection. Gaps the proxy already had in 4.0.5 are reported as known gaps that fail the run once they start passing. Server stderr goes to a log file, and the SDK's SSE reader is quieted where a check cancels a call on purpose. langchain-mcp-adapters' smoke is renamed smoke_langchain_mcp_adapters.py. Claude-Session: https://claude.ai/code/session_01KfHgVhbYEhBCC5eSeqGiuG Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com> |
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| copilot-instructions.md | ||
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