Lupin

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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠛⠛⠛⠉⠉⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷

Lupin

Claude Code, on any model.
The gentleman router: it borrows the Claude Code harness and lends it to other models.

Your whole setup lives in Claude Code, not in the model: MCP servers, skills, CLAUDE.md, hooks, memories, plugins. But Claude Code speaks one protocol, the Anthropic Messages API, so trying another model means changing tool and starting over.

Lupin changes the model. Nothing else moves.

Start here

Prerequisites

Lupin supports Windows, macOS and Linux. The proxy binds only to
127.0.0.1. Prompts and responses are never persisted.

Fastest path

With the Rust sidecar on the PATH (next section) that second command is the
guided add-provider screen: masked key input, a real 1-token verification,
OAuth with browser polling, local runtimes with live model discovery. Without
the sidecar, bare lupin starts the setup daemon and prints the authenticated
curl calls that list the providers and verify your key: the first verified
provider persists the config. Either way, nothing is saved before a
verification succeeds, and then:

That command starts Claude Code with its API traffic pointed at…