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DavisVaughan
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Mar 2, 2026
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Second part of #1069.
Adds support for the
history_requestmessage type defined in the Jupyter protocol. Previously,history_requestwas completely unrecognized by amalthea and the message failed to parse as a known type, got logged as a warning, and no reply was ever sent. Clients would time out waiting.The handler is exposed as
ShellHandler::handle_history_requestthat individual kernels can override. Ark returns empty history since we don't maintain Jupyter-style session history.