[BUG] Managed settings aren't validated causing silent failures

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

If an Admin in a Team modifies settings.json, no validation is applied on what they insert (e.g. values of wrong type). This causes the JSON to fail downstream on Claude Code:

2026-05-14T12:45:37.671Z [DEBUG] Remote settings: Settings validation failed - [
  {
    "expected": "object",
    "code": "invalid_type",
    "path": [
      "allowedChannelPlugins",
      0
    ],
    "message": "Invalid input: expected object, received string"
  }
]

..causing the settings to not be applied as you'd expect.

What Should Happen?

The same schema validation that runs on clients should run before it allows you to save settings.json

Error Messages/Logs

2026-05-14T12:45:37.671Z [DEBUG] Remote settings: Settings validation failed - [
  {
    "expected": "object",
    "code": "invalid_type",
    "path": [
      "allowedChannelPlugins",
      0
    ],
    "message": "Invalid input: expected object, received string"
  }
]

Steps to Reproduce

1. As an Admin of a Team, go to managed settings
2. Type this for settings.json:

{
  "channelsEnabled": true,
  "allowedChannelPlugins": ["discord"]
}

1. Login to your org and see that you can't use the plugin.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.140 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_