ForeverVM MCP Server

ForeverVM, from Jamsocket, gives a model a persistent Python REPL in a sandbox: start a REPL, run code in it, and keep the session alive across calls. The persistence is the whole point — variables, loaded dataframes and imports survive between tool calls, so an agent can explore data iteratively the way a person would in a notebook, rather than re-running a whole script each time it wants one more number.