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Port of #2239 (v1.x) to v2 (#2275)

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Konstantin Konstantinov 2026-06-10 20:14:36 +03:00 • committed by GitHub
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---
'@modelcontextprotocol/core': patch
'@modelcontextprotocol/client': patch
'@modelcontextprotocol/server': patch
---
Add a configurable `maxBufferSize` (default 10 MB) to the stdio transports. When a single message would push the read buffer past the limit, the transport now emits an `onerror` and closes instead of growing the buffer unbounded. Configure via `new StdioClientTransport({ ..., maxBufferSize })` or `new StdioServerTransport(stdin, stdout, { maxBufferSize })`. The default is exported from `@modelcontextprotocol/core` as `STDIO_DEFAULT_MAX_BUFFER_SIZE`.