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JSON-RPC client unmarshaling fails when server uses string request IDs

JSON-RPC client unmarshaling fails when server uses string request IDs: a task in LegoFlow-SWE (Harbor dataset). When connecting to an MCP server that returns string‑typed request IDs (e.g. "id": "abc-123" instead of "id": 1 ), the client repeatedly logs an error like:

The task

When connecting to an MCP server that returns string‑typed request IDs (e.g. `"id": "abc-123"` instead of `"id": 1`), the client repeatedly logs an error like:

Part of Lego-X/LegoFlow-SWE.