Can we bring back Plan9 architecture now? It had what was essentially MCP. You make a custom device driver, and anything really can be a file. Not only that, but you network them, so a file on local disk could be a display on a remote host (or whatever). Just tell the agent to read/write files and it doesn't need to figure out either MCP or tool calls.

This seems like the place to ask. What other big ideas have there been since everything-is-a-file? I’m not aware of any. And it seems like we want another layer of permissions on device & data access we spent have before.