How To Fix GPT-5.2-Codex ‘chrome-devtools MCP Startup Failed’ Error (The Real Root Cause)
22 days ago 高效码农A Complete, Real-World Fix for chrome-devtools MCP Startup Failure in GPT-5.2-Codex Agent Sandbox Snippet / Summary (50–80 words) When using GPT-5.2-Codex in Agent Sandbox mode, the chrome-devtools MCP may fail during initialization with a “connection closed” error. In this real troubleshooting case, the root cause was not Chrome or ports, but installing updates under Node.js 18. Reinstalling the environment with Node.js 22 resolved the MCP handshake issue completely and restored normal Sandbox operation. 1. Problem Background: Why Did a Previously Working Environment Suddenly Break? Many developers using GPT-5.2-Codex with Agent Sandbox encounter a confusing situation: the same machine, same …
OpenAI Codex Upgrade: Complete Guide to Installing gpt-5.2-codex Model
1 months ago 高效码农OpenAI Codex Upgrade: Complete Guide to gpt-5.2-codex Model and Installation Summary: OpenAI Codex has upgraded to gpt-5.2-codex, a frontier agentic coding model featuring enhanced speed and project-scale task handling capabilities. Upgrade via npm install -g @openai/codex@latest to access version v0.85.0 with gpt-5.2-codex medium mode and Agent Sandbox environment for secure Windows isolation. What Exactly Is gpt-5.2-codex and Why Should You Upgrade? OpenAI Codex just rolled out a major version update. If you’re currently using this AI coding assistant, you’ll see a prompt notifying you that Codex now runs on the brand-new gpt-5.2-codex model. This isn’t just a minor patch. The …