Wholesale-adopt latest upstream codex-rs (97 crates, new architecture: model-provider-info crate, app-server-daemon/transport, code-mode-host, thread-store, file-watcher, etc.). Hanzo-only crates (browser, debug-client, instructions, tui2) preserved on disk (not yet re-added to workspace). Builds clean as upstream (codex bin). Hanzo overlay (dev bin, api.hanzo.ai default, hanzo.id/Claude login, branding) re-applied in following commits. Co-authored-by: Hanzo Dev <[email protected]>
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codex-stdio-to-uds
Traditionally, there are two transport mechanisms for an MCP server: stdio and HTTP.
This crate helps enable a third, which is UNIX domain socket, because it has the advantages that:
- The UDS can be attached to long-running process, like an HTTP server.
- The UDS can leverage UNIX file permissions to restrict access.
To that end, this crate provides an adapter between a UDS and stdio. The idea is that someone could start an MCP server that communicates over /tmp/mcp.sock. Then the user could specify this on the fly like so:
codex --config mcp_servers.example={command="codex-stdio-to-uds",args=["/tmp/mcp.sock"]}
Unfortunately, the Rust standard library does not provide support for UNIX domain sockets on Windows today even though support was added in October 2018 in Windows 10:
https://github.com/rust-lang/rust/issues/56533
As a workaround, this crate uses codex-uds, which provides a cross-platform async UDS API backed by https://crates.io/crates/uds_windows on Windows.