In order to make Codex work with connectors, we add a built-in gateway MCP that acts as a transparent proxy between the client and the connectors. The gateway MCP collects actions that are accessible to the user and sends them down to the user, when a connector action is chosen to be called, the client invokes the action through the gateway MCP as well. - [x] Add the system built-in gateway MCP to list and run connectors. - [x] Add the app server methods and protocol
codex-core
This crate implements the business logic for Codex. It is designed to be used by the various Codex UIs written in Rust.
Dependencies
Note that codex-core makes some assumptions about certain helper utilities being available in the environment. Currently, this support matrix is:
macOS
Expects /usr/bin/sandbox-exec to be present.
When using the workspace-write sandbox policy, the Seatbelt profile allows
writes under the configured writable roots while keeping .git (directory or
pointer file), the resolved gitdir: target, and .codex read-only.
Linux
Expects the binary containing codex-core to run the equivalent of codex sandbox linux (legacy alias: codex debug landlock) when arg0 is codex-linux-sandbox. See the codex-arg0 crate for details.
All Platforms
Expects the binary containing codex-core to simulate the virtual apply_patch CLI when arg1 is --codex-run-as-apply-patch. See the codex-arg0 crate for details.