Feat (MRP): Add file system persistence #2740
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added 12 commits
August 30, 2025 00:15
added 17 commits
September 1, 2025 16:44
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@BrokenDuck We've moved mcp-run-python to its own repo: https://github.com/pydantic/mcp-run-python. Can you please resubmit this PR there? |
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Resolves #1455.
Why?
Making pyodide able to persist files would allow a lot of new workflows such as image manipulation or dataframe manipulation. A large file can be uploaded to the MCP server and manipulated in python. The file can later be downloaded.
What?
Add a new CLI option,
--mount:--mount storage: persistent storage is mounted to/home/pyodide/storage/--mount: persistent storage defaults to/home/pyodide/persistence/New MCP tools:
upload_file_from_uri: URI content will be copied to a file in the persistent storage. Any URI supported byfetchis supported.retrieve_file: Retrieve file from its filename. Following MCP protocol, a resource link is returned.New MCP Resource:
How?
We mount a NODEFS emscripten file system in a temporary directory of the local file system during the run of the MCP Server. Therefore, Deno requires access to the temporary directory.