MCP invalid schema in gpt-5.2-codex

[MartinVerges]

Description

Hello,

I'm using latest opencode and gitlab cli (1.80.4) and it works in most models but I encounter an error in gpt-5.2-codex.

Invalid schema for function 'glab_glab_api': In context=('properties', 'flags', 'properties', 'field'), array schema missing items. config:

    "glab": {
      "type": "local",
      "enabled": true,
      "command": ["glab", "mcp", "serve"]
    },

Plugins

No response

OpenCode version

1.1.19

Steps to reproduce

1. install and configure gitlab glab cli for MCP
2. add config

    "glab": {
      "type": "local",
      "enabled": true,
      "command": ["glab", "mcp", "serve"]
    },

3. run a prompt

Screenshot and/or share link

Operating System

MacOS 26

Terminal

Ghostty