This is a lifesaver if you're using the Codex app with Xcode.
Xcode 26.3's MCP bridge (xcrun mcpbridge) uses stdio transport which only supports a single connection. Codex App spawns a new mcpbridge process per agent/tool call, triggering a macOS security approval dialog every time. Affects Claude Code multi-agent setups too.
Fix Xcode MCP spam security prompts in Codex/Claude Code — mcp-proxy
## Problem Xcode 26.3's MCP bridge (`xcrun mcpbridge`) uses stdio transport which only supports a single connection. Codex App spawns a new `mcpbridge` process