## Why The zsh integration tests were still brittle in two ways: - they relied on `CODEX_TEST_ZSH_PATH` / environment-specific setup, so they often did not exercise the patched zsh fork that `shell-tool-mcp` ships - once the tests consistently used the vendored zsh fork, they exposed real Linux-specific zsh-fork issues in CI In particular, the Linux failures were not just test noise: - the zsh-fork launch path was dropping `ExecRequest.arg0`, so Linux `codex-linux-sandbox` arg0 dispatch did not run and zsh wrapper-mode could receive malformed arguments - the `turn_start_shell_zsh_fork_subcommand_decline_marks_parent_declined_v2` test uses the zsh exec bridge (which talks to the parent over a Unix socket), but Linux restricted sandbox seccomp denies `connect(2)`, causing timeouts on `ubuntu-24.04` x86/arm This PR makes the zsh tests consistently run against the intended vendored zsh fork and fixes/hardens the zsh-fork path so the Linux CI signal is meaningful. ## What Changed - Added a single shared test-only DotSlash file for the patched zsh fork at `codex-rs/exec-server/tests/suite/zsh` (analogous to the existing `bash` test resource). - Updated both app-server and exec-server zsh tests to use that shared DotSlash zsh (no duplicate zsh DotSlash file, no `CODEX_TEST_ZSH_PATH` dependency). - Updated the app-server zsh-fork test helper to resolve the shared DotSlash zsh and avoid silently falling back to host zsh. - Kept the app-server zsh-fork tests configured via `config.toml`, using a test wrapper path where needed to force `zsh -df` (and rewrite `-lc` to `-c`) for the subcommand-decline test. - Hardened the app-server subcommand-decline zsh-fork test for CI variability: - tolerate an extra `/responses` POST with a no-op mock response - tolerate non-target approval ordering while remaining strict on the two `/usr/bin/true` approvals and decline behavior - use `DangerFullAccess` on Linux for this one test because it validates zsh approval flow, not Linux sandbox socket restrictions - Fixed zsh-fork process launching on Linux by preserving `req.arg0` in `ZshExecBridge::execute_shell_request(...)` so `codex-linux-sandbox` arg0 dispatch continues to work. - Moved `maybe_run_zsh_exec_wrapper_mode()` under `arg0_dispatch_or_else(...)` in `app-server` and `cli` so wrapper-mode handling coexists correctly with arg0-dispatched helper modes. - Consolidated duplicated `dotslash -- fetch` resolution logic into shared test support (`core/tests/common/lib.rs`). - Updated `codex-rs/exec-server/tests/suite/accept_elicitation.rs` to use DotSlash zsh and hardened the zsh elicitation test for Bazel/zsh differences by: - resolving an absolute `git` path - running `git init --quiet .` - asserting success / `.git` creation instead of relying on banner text ## Verification - `cargo test -p codex-app-server turn_start_zsh_fork -- --nocapture` - `cargo test -p codex-exec-server accept_elicitation -- --nocapture` - `bazel test //codex-rs/exec-server:exec-server-all-test --test_output=streamed --test_arg=--nocapture --test_arg=accept_elicitation_for_prompt_rule_with_zsh` - CI (`rust-ci`) on the final cleaned commit: `Tests — ubuntu-24.04 - x86_64-unknown-linux-gnu` and `Tests — ubuntu-24.04-arm - aarch64-unknown-linux-gnu` passed in [run 22291424358](https://github.com/openai/codex/actions/runs/22291424358)
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.
Network access and filesystem read/write roots are controlled by
SandboxPolicy. Seatbelt consumes the resolved policy and enforces it.
Seatbelt also supports macOS permission-profile extensions layered on top of
SandboxPolicy:
- no extension profile provided:
keeps legacy default preferences read access (
user-preference-read). - extension profile provided with no
macos_preferencesgrant: does not add preferences access clauses. macos_preferences = "readonly": enables cfprefs read clauses anduser-preference-read.macos_preferences = "readwrite": includes readonly clauses plususer-preference-writeand cfprefs shm write clauses.macos_automation = true: enables broad Apple Events send permissions.macos_automation = ["com.apple.Notes", ...]: enables Apple Events send only to listed bundle IDs.macos_accessibility = true: enablescom.apple.axservermach lookup.macos_calendar = true: enablescom.apple.CalendarAgentmach lookup.
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.