Windows global installs expose codex as codex.cmd; spawning 'codex' without shell hits ENOENT.
Enable shell to align with Claude's Windows behavior and resolve PATH lookup.
Shell spawn makes cmd.exe strip TOML double quotes in -c arrays, so args become a string.
Switch mcp args to TOML literal (single-quoted) arrays to preserve types; update tests.
Implements MCP server configuration and developer instructions support in
Codex local mode, bringing it to parity with remote mode.
Key additions:
- buildMcpServerConfigArgs() and buildDeveloperInstructionsArg() utilities
to construct -c config arguments for passing MCP servers and instructions
to the Codex CLI at runtime
- TITLE_INSTRUCTION for Codex to call hapi__change_title to update chat
session titles dynamically
- Codex local mode now starts hapi MCP bridge server and passes both MCP
configuration and developer instructions to Claude, enabling full feature
parity with remote mode
Files changed:
- New: codexMcpConfig.ts (utilities), systemPrompt.ts (prompt definition),
codexMcpConfig.test.ts (comprehensive tests)
- Updated: codexLocal.ts (accepts mcpServers, builds config args),
codexLocalLauncher.ts (starts hapi server, passes config),
codexStartConfig.ts (imports TITLE_INSTRUCTION)
