## Summary
- reuse a shared remote exec-server for remote-aware codex-core
integration tests within a test binary process
- keep per-test remote cwd creation and cleanup so tests retain
workspace isolation
- leave codex_self_exe, codex_linux_sandbox_exe, cwd_path(), and
workspace_path() behavior unchanged
## Validation
- rustfmt codex-rs/core/tests/common/test_codex.rs
- git diff --check
- CI is running on the updated branch
## Summary\n- add an exec-server package-local test helper binary that
can run exec-server and fs-helper flows\n- route exec-server filesystem
tests through that helper instead of cross-crate codex helper
binaries\n- stop relying on Bazel-only extra binary wiring for these
tests\n\n## Testing\n- not run (per repo guidance for codex changes)
---------
Co-authored-by: Codex <noreply@openai.com>
## Summary
- Convert unified exec integration tests that can run against the remote
executor to use the remote-aware test harness.
- Create workspace directories through the executor filesystem for
remote runs.
- Install `python3` and `zsh` in the remote test container so restored
Python/zsh-based test commands work in fresh Ubuntu containers.
## Validation
- `just fmt`
- `cargo test -p codex-core --test all unified_exec_defaults_to_pipe`
- `cargo test -p codex-core --test all unified_exec_can_enable_tty`
- `cargo test -p codex-core --test all unified_exec`
- Remote on `codex-remote`: `source scripts/test-remote-env.sh && cd
codex-rs && cargo test -p codex-core --test all unified_exec`
- `just fix -p codex-core`
`CODEX_TEST_REMOTE_ENV` will make `test_codex` start the executor
"remotely" (inside a docker container) turning any integration test into
remote test.
