codex exec failing with & without update_plan

What version of Codex is running?

codex-cli-exec 0.16.0

Which model were you using?

gpt-5

What platform is your computer?

Darwin 24.5.0 arm64 arm

What steps can reproduce the bug?

codex exec "run update_plan tool with some smoke test"

What is the expected behavior?

update_plan tool should be run

What do you see instead?

[2025-08-07T18:49:35] codex

I’ll set up a tiny smoke-test plan, then mark it complete.
[2025-08-07T18:49:35] exec bash -lc "update_plan << 'EOF'
[
  {\"step\": \"Create smoke-test plan\", \"status\": \"in_progress\"},
  {\"step\": \"Verify update mechanism\", \"status\": \"pending\"},
  {\"step\": \"Finalize by completing plan\", \"status\": \"pending\"}
]
EOF" in /Users/chipstack/sandbox/codex
[2025-08-07T18:49:36] bash -lc "update_plan << 'EOF'
[
  {\"step\": \"Create smoke-test plan\", \"status\": \"in_progress\"},
  {\"step\": \"Verify update mechanism\", \"status\": \"pending\"},
  {\"step\": \"Finalize by completing plan\", \"status\": \"pending\"}
]
EOF" exited 127 in 648ms:
/opt/homebrew/Library/Homebrew/brew.sh: line 60: cannot create temp file for here document: Operation not permitted
/opt/homebrew/Library/Homebrew/cmd/shellenv.sh: line 18: /bin/ps: Operation not permitted
bash: line 1: update_plan: command not found

Additional information

I set include_plan_tool = true in config.toml but it doesn't work; Cursor tell me it's because ConfigToml doesn't has that field. It's hardcoded to true in tui, but cli doesn't have it.

Also, trying to use the CLI without plan_tool won't work either, because prompt.md is hardcoded to have that tool and model will try to use it.