In this PR, I am exploring migrating task kind to an invocation of Codex. The main reason would be getting rid off multiple `ConversationHistory` state and streamlining our context/history management. This approach depends on opening a channel between the sub-codex and codex. This channel is responsible for forwarding `interactive` (`approvals`) and `non-interactive` events. The `task` is responsible for handling those events. This opens the door for implementing `codex as a tool`, replacing `compact` and `review`, and potentially subagents. One consideration is this code is very similar to `app-server` specially in the approval part. If in the future we wanted an interactive `sub-codex` we should consider using `codex-mcp`
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.
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.