fix: auto-detect codex version and use correct MCP command #41
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Fixes compatibility issues with codex versions 0.43.0-alpha.5 and later which introduced the new 'mcp-server' subcommand. The code now: - Detects the installed codex version at runtime - Uses 'mcp-server' for versions >= 0.43.0-alpha.5 - Falls back to 'mcp' for older versions - Defaults to 'mcp-server' if version detection fails This resolves MCP connection errors when using newer codex versions. Fixes #39 🤖 Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
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Dec 5, 2025
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Summary
Fixes compatibility issues with codex versions 0.43.0-alpha.5 and later by automatically detecting the installed codex version and using the correct MCP subcommand.
Problem
Starting from codex version 0.43.0-alpha.5, OpenAI introduced a new
mcp-serversubcommand to replace the oldermcpcommand for running Codex as an MCP server. This change broke compatibility for users upgrading to newer versions, causing connection errors like "MCP error -32000: Connection closed" (#39).Solution
This PR adds automatic version detection that:
codex --versionmcp-serverfor versions >= 0.43.0-alpha.5mcpfor older versions (< 0.43.0-alpha.5)mcp-serverif version detection fails (assumes newer installation)Testing
mcp)mcp)mcp)mcp-server)mcp-server)mcp-server)Changes
getCodexMcpCommand()function insrc/codex/codexMcpClient.tsconnect()methodFixes
🤖 Generated with Claude Code
via Happy