feat(exec): Add --disable-builtin-tools flag for MCP-only mode #5001
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This adds a new CLI flag that allows users to disable all built-in tools (shell, file operations, plan, apply_patch) while keeping MCP tools and web search available. This is useful for running codex exec in headless mode with only custom MCP tools. Changes: - Add --disable-builtin-tools CLI flag to exec - Thread flag through ConfigOverrides and Config - Update ToolsConfig to conditionally register built-in tools - Keep MCP tools, web_search, and view_image available 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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All contributors have signed the CLA ✍️ ✅ |
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I have read the CLA Document and I hereby sign the CLA |
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kmk142789
approved these changes
Oct 13, 2025
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Summary
Adds a new
--disable-builtin-toolsCLI flag tocodex execthat allows users to disable all built-in tools (shell, file operations, plan, apply_patch) while keeping MCP tools and web search available.This is useful for running codex exec in headless mode with only custom MCP tools, enabling better control over the agent's capabilities.
Changes
--disable-builtin-toolsCLI flag to execTesting
Verified the flag works correctly:
Built and tested successfully with both configurations.