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Title: fix(client/stdio): default encoding_error_handler to 'replace' for resilient UTF-8 decoding by sarvesh1327 · Pull Request #2907 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: fix(client/stdio): default encoding_error_handler to 'replace' for resilient UTF-8 decoding by sarvesh1327 · Pull Request #2907 · modelcontextprotocol/python-sdk

X Title: fix(client/stdio): default encoding_error_handler to 'replace' for resilient UTF-8 decoding by sarvesh1327 · Pull Request #2907 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - fix(client/stdio): default encoding_error_handler to 'replace' for resilient UTF-8 decoding by sarvesh1327 · Pull Request #2907 · modelcontextprotocol/python-sdk

Open Graph Description: Summary Changes the default encoding_error_handler in StdioServerParameters from "strict" to "replace". Malformed UTF-8 bytes from a child server stdout previously crashed the ...

X Description: Summary Changes the default encoding_error_handler in StdioServerParameters from "strict" to "replace". Malformed UTF-8 bytes from a child server stdout previou...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2907

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fix: handle non-UTF-8 bytes in stdio server stdin #2302	https://github.com/modelcontextprotocol/python-sdk/pull/2302
stdio_client crashes on malformed UTF-8 from child stdout instead of surfacing parse error #2454	https://github.com/modelcontextprotocol/python-sdk/issues/2454
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Jun 19, 2026	https://github.com/modelcontextprotocol/python-sdk/pull/2907#ref-pullrequest-4701520792
Re-vendor 2026-07-28 schema and absorb spec #2907 error-code renumber #2912	https://github.com/modelcontextprotocol/python-sdk/pull/2912
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stdio_client crashes on malformed UTF-8 from child stdout instead of surfacing parse error	https://github.com/modelcontextprotocol/python-sdk/issues/2454
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