Regression in 0.143.0: workspace shell unavailable + Unknown parameter: input[107].namespace

What version of Codex CLI is running?

0.143.0

What subscription do you have?

PLUS

Which model were you using?

gpt-5.5

What platform is your computer?

Linux 6.17.0-35-generic x86_64 x86_64

What terminal emulator and version are you using (if applicable)?

Ubuntu terminal

Codex doctor report

codex doctor reports no problems.

What issue are you seeing?

When resuming codex sessions I get errors on new queries:

{ 
    "type": "error", 
    "error": { 
        "type": "invalid_request_error", 
        "message": "[ObjectParam] [input[107].namespace] [unknown_parameter] Unknown parameter: 'input[107].namespace'." 
    }, 
    "status": 400 
}

When starting a new codex session:

workspace shell tool is currently not available

What steps can reproduce the bug?

• Codex CLI: 0.143.0
• OS: Ubuntu 24.04
• Install method: npm
• Node: 25.1.0
• Authentication: ChatGPT
• Sandbox: restricted, OnRequest

Just resume an existing conversation and try to continue it. Or start a new session and try to do something.

Downgrading to 0.142.5 immediately fixes both issues.

What is the expected behavior?

• Existing conversations resume normally.
• Workspace shell is available in new sessions.

Additional information

_No response_