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MCP's not working in VS Code Extension or CLI since somewhere in November #8836

@Zokor

Description

@Zokor

What version of Codex is running?

0.79.0

What subscription do you have?

Pro

Which model were you using?

GPT-5.0, GPT-5.1 and GPT-5.2 issue is sometime old already

What platform is your computer?

MacOS

What issue are you seeing?

Check -> #6465 (comment)

Image

What steps can reproduce the bug?

{
"servers": {
"laravel-boost": {
"command": "php",
"args": [
"artisan",
"boost:mcp"
]
},
"herd": {
"command": "php",
"args": [
"/Applications/Herd.app/Contents/Resources/herd-mcp.phar"
],
"env": {
"SITE_PATH": "/Users/brunogomes/Documents/Herd/potencia-iberica"
}
},
"playwright": {
"command": "npx",
"args": [
"@playwright/mcp@latest"
]
},
"sequential-thinking": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-sequential-thinking"
]
},
"chrome-devtools": {
"command": "npx",
"args": [
"chrome-devtools-mcp@latest",
"--channel=canary",
"--headless=true",
"--isolated=true"
]
}
}
}

What is the expected behavior?

To work flawlessly detecting the .vscode/mcp.json using the VSCode extension

Additional information

I tried to install through Node and Brew, but the issue happens with any of the Cli installations

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    CLIIssues related to the Codex CLIbugSomething isn't workingextensionIssues related to the VS Code extensionmcpIssues related to the use of model context protocol (MCP) servers

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