config-basic.md Codex Docs, 2026-03-07 18:10 UTC → 2026-03-18 12:23 UTC

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148| Key | Default | Maturity | Description |148| Key | Default | Maturity | Description |

149| -------------------- | :-------------------: | ------------ | ---------------------------------------------------------------------------------------- |149| -------------------- | :-------------------: | ------------ | ---------------------------------------------------------------------------------------- |

150| `apply_patch_freeform` | false | Experimental | Include the freeform `apply_patch` tool |

151| `apps` | false | Experimental | Enable ChatGPT Apps/connectors support |150| `apps` | false | Experimental | Enable ChatGPT Apps/connectors support |

152| `apps_mcp_gateway` | false | Experimental | Route Apps MCP calls through `https://api.openai.com/v1/connectors/mcp/` instead of legacy routing |151| `fast_mode` | true | Stable | Enable Fast mode selection and the `service_tier = "fast"` path |

153| `collaboration_modes` | true | Stable | Enable collaboration modes such as plan mode |152| `multi_agent` | true | Stable | Enable subagent collaboration tools |

154| `multi_agent` | false | Experimental | Enable multi-agent collaboration tools |

155| `personality` | true | Stable | Enable personality selection controls |153| `personality` | true | Stable | Enable personality selection controls |

156| `remote_models` | false | Experimental | Refresh remote model list before showing readiness |154| `shell_snapshot` | true | Stable | Snapshot your shell environment to speed up repeated commands |

157| `runtime_metrics` | false | Experimental | Show runtime metrics summaries in TUI turn separators |

158| `request_rule` | true | Stable | Enable Smart approvals (`prefix_rule` suggestions) |

159| `search_tool` | false | Experimental | Enable `search_tool_bm25` so Codex discovers Apps MCP tools via search before tool calls |

160| `shell_snapshot` | false | Beta | Snapshot your shell environment to speed up repeated commands |

161| `shell_tool` | true | Stable | Enable the default `shell` tool |155| `shell_tool` | true | Stable | Enable the default `shell` tool |

162| `use_linux_sandbox_bwrap` | false | Experimental | Use the bubblewrap-based Linux sandbox pipeline |156| `smart_approvals` | false | Experimental | Route eligible approval requests through the guardian reviewer subagent |

163| `unified_exec` | false | Beta | Use the unified PTY-backed exec tool |157| `unified_exec` | `true` except Windows | Stable | Use the unified PTY-backed exec tool |

164| `undo` | true | Stable | Enable undo via per-turn git ghost snapshots |158| `undo` | false | Stable | Enable undo via per-turn git ghost snapshots |

165| `web_search` | true | Deprecated | Legacy toggle; prefer the top-level `web_search` setting |159| `web_search` | true | Deprecated | Legacy toggle; prefer the top-level `web_search` setting |

166| `web_search_cached` | true | Deprecated | Legacy toggle that maps to `web_search = "cached"` when unset |160| `web_search_cached` | false | Deprecated | Legacy toggle that maps to `web_search = "cached"` when unset |

167| `web_search_request` | true | Deprecated | Legacy toggle that maps to `web_search = "live"` when unset |161| `web_search_request` | false | Deprecated | Legacy toggle that maps to `web_search = "live"` when unset |

168 162 

169The Maturity column uses feature maturity labels such as Experimental, Beta,163The Maturity column uses feature maturity labels such as Experimental, Beta,

170 and Stable. See [Feature Maturity](https://developers.openai.com/codex/feature-maturity) for how to164 and Stable. See [Feature Maturity](https://developers.openai.com/codex/feature-maturity) for how to