config-reference.md Codex Docs, 2026-02-23 18:27 UTC → 2026-05-07 20:02 UTC

6 6 

7User-level configuration lives in `~/.codex/config.toml`. You can also add project-scoped overrides in `.codex/config.toml` files. Codex loads project-scoped config files only when you trust the project.7User-level configuration lives in `~/.codex/config.toml`. You can also add project-scoped overrides in `.codex/config.toml` files. Codex loads project-scoped config files only when you trust the project.

8 8 

9For sandbox and approval keys (`approval_policy`, `sandbox_mode`, and `sandbox_workspace_write.*`), pair this reference with [Sandbox and approvals](https://developers.openai.com/codex/security#sandbox-and-approvals), [Protected paths in writable roots](https://developers.openai.com/codex/security#protected-paths-in-writable-roots), and [Network access](https://developers.openai.com/codex/security#network-access).9For sandbox and approval keys (`approval_policy`, `sandbox_mode`, and `sandbox_workspace_write.*`), pair this reference with [Sandbox and approvals](https://developers.openai.com/codex/agent-approvals-security#sandbox-and-approvals), [Protected paths in writable roots](https://developers.openai.com/codex/agent-approvals-security#protected-paths-in-writable-roots), and [Network access](https://developers.openai.com/codex/agent-approvals-security#network-access).

10 10 

11| Key | Type / Values | Details |11<ConfigTable

12| --- | --- | --- |12 options={[

13| `agents.<name>.config_file` | `string (path)` | Path to a TOML config layer for that role; relative paths resolve from the config file that declares the role. |13 {

14| `agents.<name>.description` | `string` | Role guidance shown to Codex when choosing and spawning that agent type. |14 key: "model",

15| `agents.max_threads` | `number` | Maximum number of agent threads that can be open concurrently. |15 type: "string",

16| `approval_policy` | `untrusted | on-request | never` | Controls when Codex pauses for approval before executing commands. `on-failure` is deprecated; use `on-request` for interactive runs or `never` for non-interactive runs. |16 description: "Model to use (e.g., `gpt-5.5`).",

17| `apps.<id>.disabled_reason` | `unknown | user` | Optional reason attached when an app/connector is disabled. |17 },

18| `apps.<id>.enabled` | `boolean` | Enable or disable a specific app/connector by id (default: true). |18 {

19| `chatgpt_base_url` | `string` | Override the base URL used during the ChatGPT login flow. |19 key: "review_model",

20| `check_for_update_on_startup` | `boolean` | Check for Codex updates on startup (set to false only when updates are centrally managed). |20 type: "string",

21| `cli_auth_credentials_store` | `file | keyring | auto` | Control where the CLI stores cached credentials (file-based auth.json vs OS keychain). |21 description:

22| `compact_prompt` | `string` | Inline override for the history compaction prompt. |22 "Optional model override used by `/review` (defaults to the current session model).",

23| `developer_instructions` | `string` | Additional developer instructions injected into the session (optional). |23 },

24| `disable_paste_burst` | `boolean` | Disable burst-paste detection in the TUI. |24 {

25| `experimental_compact_prompt_file` | `string (path)` | Load the compaction prompt override from a file (experimental). |25 key: "model_provider",

26| `experimental_use_freeform_apply_patch` | `boolean` | Legacy name for enabling freeform apply\_patch; prefer `[features].apply_patch_freeform` or `codex --enable apply_patch_freeform`. |26 type: "string",

27| `experimental_use_unified_exec_tool` | `boolean` | Legacy name for enabling unified exec; prefer `[features].unified_exec` or `codex --enable unified_exec`. |27 description: "Provider id from `model_providers` (default: `openai`).",

28| `features.apply_patch_freeform` | `boolean` | Expose the freeform `apply_patch` tool (experimental). |28 },

29| `features.apps` | `boolean` | Enable ChatGPT Apps/connectors support (experimental). |29 {

30| `features.apps_mcp_gateway` | `boolean` | Route Apps MCP calls through the OpenAI connectors MCP gateway (`https://api.openai.com/v1/connectors/mcp/`) instead of legacy routing (experimental). |30 key: "openai_base_url",

31| `features.child_agents_md` | `boolean` | Append AGENTS.md scope/precedence guidance even when no AGENTS.md is present (experimental). |31 type: "string",

32| `features.collaboration_modes` | `boolean` | Enable collaboration modes such as plan mode (stable; on by default). |32 description:

33| `features.elevated_windows_sandbox` | `boolean` | Enable the elevated Windows sandbox pipeline (experimental). |33 "Base URL override for the built-in `openai` model provider.",

34| `features.experimental_windows_sandbox` | `boolean` | Run the Windows restricted-token sandbox (experimental). |34 },

35| `features.multi_agent` | `boolean` | Enable multi-agent collaboration tools (`spawn\_agent`, `send\_input`, `resume\_agent`, `wait`, and `close\_agent`) (experimental; off by default). |35 {

36| `features.personality` | `boolean` | Enable personality selection controls (stable; on by default). |36 key: "model_context_window",

37| `features.powershell_utf8` | `boolean` | Force PowerShell UTF-8 output (defaults to true). |37 type: "number",

38| `features.remote_models` | `boolean` | Refresh remote model list before showing readiness (experimental). |38 description: "Context window tokens available to the active model.",

39| `features.request_rule` | `boolean` | Enable Smart approvals (`prefix_rule` suggestions on escalation requests; stable; on by default). |39 },

40| `features.runtime_metrics` | `boolean` | Show runtime metrics summary in TUI turn separators (experimental). |40 {

41| `features.search_tool` | `boolean` | Enable `search_tool_bm25` for Apps tool discovery before invoking app MCP tools (experimental). |41 key: "model_auto_compact_token_limit",

42| `features.shell_snapshot` | `boolean` | Snapshot shell environment to speed up repeated commands (beta). |42 type: "number",

43| `features.shell_tool` | `boolean` | Enable the default `shell` tool for running commands (stable; on by default). |43 description:

44| `features.unified_exec` | `boolean` | Use the unified PTY-backed exec tool (beta). |44 "Token threshold that triggers automatic history compaction (unset uses model defaults).",

45| `features.use_linux_sandbox_bwrap` | `boolean` | Use the bubblewrap-based Linux sandbox pipeline (experimental; off by default). |45 },

46| `features.web_search` | `boolean` | Deprecated legacy toggle; prefer the top-level `web_search` setting. |46 {

47| `features.web_search_cached` | `boolean` | Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "cached"`. |47 key: "model_catalog_json",

48| `features.web_search_request` | `boolean` | Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "live"`. |48 type: "string (path)",

49| `feedback.enabled` | `boolean` | Enable feedback submission via `/feedback` across Codex surfaces (default: true). |49 description:

50| `file_opener` | `vscode | vscode-insiders | windsurf | cursor | none` | URI scheme used to open citations from Codex output (default: `vscode`). |50 "Optional path to a JSON model catalog loaded on startup. Profile-level `profiles.<name>.model_catalog_json` can override this per profile.",

51| `forced_chatgpt_workspace_id` | `string (uuid)` | Limit ChatGPT logins to a specific workspace identifier. |51 },

52| `forced_login_method` | `chatgpt | api` | Restrict Codex to a specific authentication method. |52 {

53| `hide_agent_reasoning` | `boolean` | Suppress reasoning events in both the TUI and `codex exec` output. |53 key: "oss_provider",

54| `history.max_bytes` | `number` | If set, caps the history file size in bytes by dropping oldest entries. |54 type: "lmstudio | ollama",

55| `history.persistence` | `save-all | none` | Control whether Codex saves session transcripts to history.jsonl. |55 description:

56| `include_apply_patch_tool` | `boolean` | Legacy name for enabling freeform apply\_patch; prefer `[features].apply_patch_freeform`. |56 "Default local provider used when running with `--oss` (defaults to prompting if unset).",

57| `instructions` | `string` | Reserved for future use; prefer `model_instructions_file` or `AGENTS.md`. |57 },

58| `log_dir` | `string (path)` | Directory where Codex writes log files (for example `codex-tui.log`); defaults to `$CODEX_HOME/log`. |58 {

59| `mcp_oauth_callback_port` | `integer` | Optional fixed port for the local HTTP callback server used during MCP OAuth login. When unset, Codex binds to an ephemeral port chosen by the OS. |59 key: "approval_policy",

60| `mcp_oauth_credentials_store` | `auto | file | keyring` | Preferred store for MCP OAuth credentials. |60 type: "untrusted | on-request | never | { granular = { sandbox_approval = bool, rules = bool, mcp_elicitations = bool, request_permissions = bool, skill_approval = bool } }",

61| `mcp_servers.<id>.args` | `array<string>` | Arguments passed to the MCP stdio server command. |61 description:

62| `mcp_servers.<id>.bearer_token_env_var` | `string` | Environment variable sourcing the bearer token for an MCP HTTP server. |62 "Controls when Codex pauses for approval before executing commands. You can also use `approval_policy = { granular = { ... } }` to allow or auto-reject specific prompt categories while keeping other prompts interactive. `on-failure` is deprecated; use `on-request` for interactive runs or `never` for non-interactive runs.",

63| `mcp_servers.<id>.command` | `string` | Launcher command for an MCP stdio server. |63 },

64| `mcp_servers.<id>.cwd` | `string` | Working directory for the MCP stdio server process. |64 {

65| `mcp_servers.<id>.disabled_tools` | `array<string>` | Deny list applied after `enabled_tools` for the MCP server. |65 key: "approval_policy.granular.sandbox_approval",

66| `mcp_servers.<id>.enabled` | `boolean` | Disable an MCP server without removing its configuration. |66 type: "boolean",

67| `mcp_servers.<id>.enabled_tools` | `array<string>` | Allow list of tool names exposed by the MCP server. |67 description:

68| `mcp_servers.<id>.env` | `map<string,string>` | Environment variables forwarded to the MCP stdio server. |68 "When `true`, sandbox escalation approval prompts are allowed to surface.",

69| `mcp_servers.<id>.env_http_headers` | `map<string,string>` | HTTP headers populated from environment variables for an MCP HTTP server. |69 },

70| `mcp_servers.<id>.env_vars` | `array<string>` | Additional environment variables to whitelist for an MCP stdio server. |70 {

71| `mcp_servers.<id>.http_headers` | `map<string,string>` | Static HTTP headers included with each MCP HTTP request. |71 key: "approval_policy.granular.rules",

72| `mcp_servers.<id>.required` | `boolean` | When true, fail startup/resume if this enabled MCP server cannot initialize. |72 type: "boolean",

73| `mcp_servers.<id>.startup_timeout_ms` | `number` | Alias for `startup_timeout_sec` in milliseconds. |73 description:

74| `mcp_servers.<id>.startup_timeout_sec` | `number` | Override the default 10s startup timeout for an MCP server. |74 "When `true`, approvals triggered by execpolicy `prompt` rules are allowed to surface.",

75| `mcp_servers.<id>.tool_timeout_sec` | `number` | Override the default 60s per-tool timeout for an MCP server. |75 },

76| `mcp_servers.<id>.url` | `string` | Endpoint for an MCP streamable HTTP server. |76 {

77| `model` | `string` | Model to use (e.g., `gpt-5-codex`). |77 key: "approval_policy.granular.mcp_elicitations",

78| `model_auto_compact_token_limit` | `number` | Token threshold that triggers automatic history compaction (unset uses model defaults). |78 type: "boolean",

79| `model_context_window` | `number` | Context window tokens available to the active model. |79 description:

80| `model_instructions_file` | `string (path)` | Replacement for built-in instructions instead of `AGENTS.md`. |80 "When `true`, MCP elicitation prompts are allowed to surface instead of being auto-rejected.",

81| `model_provider` | `string` | Provider id from `model_providers` (default: `openai`). |81 },

82| `model_providers.<id>.base_url` | `string` | API base URL for the model provider. |82 {

83| `model_providers.<id>.env_http_headers` | `map<string,string>` | HTTP headers populated from environment variables when present. |83 key: "approval_policy.granular.request_permissions",

84| `model_providers.<id>.env_key` | `string` | Environment variable supplying the provider API key. |84 type: "boolean",

85| `model_providers.<id>.env_key_instructions` | `string` | Optional setup guidance for the provider API key. |85 description:

86| `model_providers.<id>.experimental_bearer_token` | `string` | Direct bearer token for the provider (discouraged; use `env_key`). |86 "When `true`, prompts from the `request_permissions` tool are allowed to surface.",

87| `model_providers.<id>.http_headers` | `map<string,string>` | Static HTTP headers added to provider requests. |87 },

88| `model_providers.<id>.name` | `string` | Display name for a custom model provider. |88 {

89| `model_providers.<id>.query_params` | `map<string,string>` | Extra query parameters appended to provider requests. |89 key: "approval_policy.granular.skill_approval",

90| `model_providers.<id>.request_max_retries` | `number` | Retry count for HTTP requests to the provider (default: 4). |90 type: "boolean",

91| `model_providers.<id>.requires_openai_auth` | `boolean` | The provider uses OpenAI authentication (defaults to false). |91 description:

92| `model_providers.<id>.stream_idle_timeout_ms` | `number` | Idle timeout for SSE streams in milliseconds (default: 300000). |92 "When `true`, skill-script approval prompts are allowed to surface.",

93| `model_providers.<id>.stream_max_retries` | `number` | Retry count for SSE streaming interruptions (default: 5). |93 },

94| `model_providers.<id>.wire_api` | `chat | responses` | Protocol used by the provider (defaults to `chat` if omitted). |94 {

95| `model_reasoning_effort` | `minimal | low | medium | high | xhigh` | Adjust reasoning effort for supported models (Responses API only; `xhigh` is model-dependent). |95 key: "approvals_reviewer",

96| `model_reasoning_summary` | `auto | concise | detailed | none` | Select reasoning summary detail or disable summaries entirely. |96 type: "user | auto_review",

97| `model_supports_reasoning_summaries` | `boolean` | Force Codex to send or not send reasoning metadata. |97 description:

98| `model_verbosity` | `low | medium | high` | Control GPT-5 Responses API verbosity (defaults to `medium`). |98 "Who reviews eligible approval prompts under `on-request` or granular approval policies. Defaults to `user`; `auto_review` uses the reviewer subagent. This setting doesn't change sandboxing or review actions already allowed inside the sandbox.",

99| `notice.hide_full_access_warning` | `boolean` | Track acknowledgement of the full access warning prompt. |99 },

100| `notice.hide_gpt-5.1-codex-max_migration_prompt` | `boolean` | Track acknowledgement of the gpt-5.1-codex-max migration prompt. |100 {

101| `notice.hide_gpt5_1_migration_prompt` | `boolean` | Track acknowledgement of the GPT-5.1 migration prompt. |101 key: "auto_review.policy",

102| `notice.hide_rate_limit_model_nudge` | `boolean` | Track opt-out of the rate limit model switch reminder. |102 type: "string",

103| `notice.hide_world_writable_warning` | `boolean` | Track acknowledgement of the Windows world-writable directories warning. |103 description:

104| `notice.model_migrations` | `map<string,string>` | Track acknowledged model migrations as old->new mappings. |104 "Local Markdown policy instructions for automatic review. Managed `guardian_policy_config` takes precedence. Blank values are ignored.",

105| `notify` | `array<string>` | Command invoked for notifications; receives a JSON payload from Codex. |105 },

106| `oss_provider` | `lmstudio | ollama` | Default local provider used when running with `--oss` (defaults to prompting if unset). |106 {

107| `otel.environment` | `string` | Environment tag applied to emitted OpenTelemetry events (default: `dev`). |107 key: "allow_login_shell",

108| `otel.exporter` | `none | otlp-http | otlp-grpc` | Select the OpenTelemetry exporter and provide any endpoint metadata. |108 type: "boolean",

109| `otel.exporter.<id>.endpoint` | `string` | Exporter endpoint for OTEL logs. |109 description:

110| `otel.exporter.<id>.headers` | `map<string,string>` | Static headers included with OTEL exporter requests. |110 "Allow shell-based tools to use login-shell semantics. Defaults to `true`; when `false`, `login = true` requests are rejected and omitted `login` defaults to non-login shells.",

111| `otel.exporter.<id>.protocol` | `binary | json` | Protocol used by the OTLP/HTTP exporter. |111 },

112| `otel.exporter.<id>.tls.ca-certificate` | `string` | CA certificate path for OTEL exporter TLS. |112 {

113| `otel.exporter.<id>.tls.client-certificate` | `string` | Client certificate path for OTEL exporter TLS. |113 key: "sandbox_mode",

114| `otel.exporter.<id>.tls.client-private-key` | `string` | Client private key path for OTEL exporter TLS. |114 type: "read-only | workspace-write | danger-full-access",

115| `otel.log_user_prompt` | `boolean` | Opt in to exporting raw user prompts with OpenTelemetry logs. |115 description:

116| `otel.trace_exporter` | `none | otlp-http | otlp-grpc` | Select the OpenTelemetry trace exporter and provide any endpoint metadata. |116 "Sandbox policy for filesystem and network access during command execution.",

117| `otel.trace_exporter.<id>.endpoint` | `string` | Trace exporter endpoint for OTEL logs. |117 },

118| `otel.trace_exporter.<id>.headers` | `map<string,string>` | Static headers included with OTEL trace exporter requests. |118 {

119| `otel.trace_exporter.<id>.protocol` | `binary | json` | Protocol used by the OTLP/HTTP trace exporter. |119 key: "sandbox_workspace_write.writable_roots",

120| `otel.trace_exporter.<id>.tls.ca-certificate` | `string` | CA certificate path for OTEL trace exporter TLS. |120 type: "array<string>",

121| `otel.trace_exporter.<id>.tls.client-certificate` | `string` | Client certificate path for OTEL trace exporter TLS. |121 description:

122| `otel.trace_exporter.<id>.tls.client-private-key` | `string` | Client private key path for OTEL trace exporter TLS. |122 'Additional writable roots when `sandbox_mode = "workspace-write"`.',

123| `personality` | `none | friendly | pragmatic` | Default communication style for models that advertise `supportsPersonality`; can be overridden per thread/turn or via `/personality`. |123 },

124| `profile` | `string` | Default profile applied at startup (equivalent to `--profile`). |124 {

125| `profiles.<name>.*` | `various` | Profile-scoped overrides for any of the supported configuration keys. |125 key: "sandbox_workspace_write.network_access",

126| `profiles.<name>.experimental_use_freeform_apply_patch` | `boolean` | Legacy name for enabling freeform apply\_patch; prefer `[features].apply_patch_freeform`. |126 type: "boolean",

127| `profiles.<name>.experimental_use_unified_exec_tool` | `boolean` | Legacy name for enabling unified exec; prefer `[features].unified_exec`. |127 description:

128| `profiles.<name>.include_apply_patch_tool` | `boolean` | Legacy name for enabling freeform apply\_patch; prefer `[features].apply_patch_freeform`. |128 "Allow outbound network access inside the workspace-write sandbox.",

129| `profiles.<name>.oss_provider` | `lmstudio | ollama` | Profile-scoped OSS provider for `--oss` sessions. |129 },

130| `profiles.<name>.personality` | `none | friendly | pragmatic` | Profile-scoped communication style override for supported models. |130 {

131| `profiles.<name>.web_search` | `disabled | cached | live` | Profile-scoped web search mode override (default: `"cached"`). |131 key: "sandbox_workspace_write.exclude_tmpdir_env_var",

132| `project_doc_fallback_filenames` | `array<string>` | Additional filenames to try when `AGENTS.md` is missing. |132 type: "boolean",

133| `project_doc_max_bytes` | `number` | Maximum bytes read from `AGENTS.md` when building project instructions. |133 description:

134| `project_root_markers` | `array<string>` | List of project root marker filenames; used when searching parent directories for the project root. |134 "Exclude `$TMPDIR` from writable roots in workspace-write mode.",

135| `projects.<path>.trust_level` | `string` | Mark a project or worktree as trusted or untrusted (`"trusted"` | `"untrusted"`). Untrusted projects skip project-scoped `.codex/` layers. |135 },

136| `review_model` | `string` | Optional model override used by `/review` (defaults to the current session model). |136 {

137| `sandbox_mode` | `read-only | workspace-write | danger-full-access` | Sandbox policy for filesystem and network access during command execution. |137 key: "sandbox_workspace_write.exclude_slash_tmp",

138| `sandbox_workspace_write.exclude_slash_tmp` | `boolean` | Exclude `/tmp` from writable roots in workspace-write mode. |138 type: "boolean",

139| `sandbox_workspace_write.exclude_tmpdir_env_var` | `boolean` | Exclude `$TMPDIR` from writable roots in workspace-write mode. |139 description:

140| `sandbox_workspace_write.network_access` | `boolean` | Allow outbound network access inside the workspace-write sandbox. |140 "Exclude `/tmp` from writable roots in workspace-write mode.",

141| `sandbox_workspace_write.writable_roots` | `array<string>` | Additional writable roots when `sandbox_mode = "workspace-write"`. |141 },

142| `shell_environment_policy.exclude` | `array<string>` | Glob patterns for removing environment variables after the defaults. |142 {

143| `shell_environment_policy.experimental_use_profile` | `boolean` | Use the user shell profile when spawning subprocesses. |143 key: "windows.sandbox",

144| `shell_environment_policy.ignore_default_excludes` | `boolean` | Keep variables containing KEY/SECRET/TOKEN before other filters run. |144 type: "unelevated | elevated",

145| `shell_environment_policy.include_only` | `array<string>` | Whitelist of patterns; when set only matching variables are kept. |145 description:

146| `shell_environment_policy.inherit` | `all | core | none` | Baseline environment inheritance when spawning subprocesses. |146 "Windows-only native sandbox mode when running Codex natively on Windows.",

147| `shell_environment_policy.set` | `map<string,string>` | Explicit environment overrides injected into every subprocess. |147 },

148| `show_raw_agent_reasoning` | `boolean` | Surface raw reasoning content when the active model emits it. |148 {

149| `skills.config` | `array<object>` | Per-skill enablement overrides stored in config.toml. |149 key: "windows.sandbox_private_desktop",

150| `skills.config.<index>.enabled` | `boolean` | Enable or disable the referenced skill. |150 type: "boolean",

151| `skills.config.<index>.path` | `string (path)` | Path to a skill folder containing `SKILL.md`. |151 description:

152| `suppress_unstable_features_warning` | `boolean` | Suppress the warning that appears when under-development feature flags are enabled. |152 "Run the final sandboxed child process on a private desktop by default on native Windows. Set `false` only for compatibility with the older `Winsta0\\\\Default` behavior.",

153| `tool_output_token_limit` | `number` | Token budget for storing individual tool/function outputs in history. |153 },

154| `tools.web_search` | `boolean` | Deprecated legacy toggle for web search; prefer the top-level `web_search` setting. |154 {

155| `tui` | `table` | TUI-specific options such as enabling inline desktop notifications. |155 key: "notify",

156| `tui.alternate_screen` | `auto | always | never` | Control alternate screen usage for the TUI (default: auto; auto skips it in Zellij to preserve scrollback). |156 type: "array<string>",

157| `tui.animations` | `boolean` | Enable terminal animations (welcome screen, shimmer, spinner) (default: true). |157 description:

158| `tui.notification_method` | `auto | osc9 | bel` | Notification method for unfocused terminal notifications (default: auto). |158 "Command invoked for notifications; receives a JSON payload from Codex.",

159| `tui.notifications` | `boolean | array<string>` | Enable TUI notifications; optionally restrict to specific event types. |159 },

160| `tui.show_tooltips` | `boolean` | Show onboarding tooltips in the TUI welcome screen (default: true). |160 {

161| `tui.status_line` | `array<string> | null` | Ordered list of TUI footer status-line item identifiers. `null` disables the status line. |161 key: "check_for_update_on_startup",

162| `web_search` | `disabled | cached | live` | Web search mode (default: `"cached"`; cached uses an OpenAI-maintained index and does not fetch live pages; if you use `--yolo` or another full access sandbox setting, it defaults to `"live"`). Use `"live"` to fetch the most recent data from the web, or `"disabled"` to remove the tool. |162 type: "boolean",

163| `windows_wsl_setup_acknowledged` | `boolean` | Track Windows onboarding acknowledgement (Windows only). |163 description:

164 164 "Check for Codex updates on startup (set to false only when updates are centrally managed).",

165Key165 },

166 166 {

167`agents.<name>.config_file`167 key: "feedback.enabled",

168 168 type: "boolean",

169Type / Values169 description:

170 170 "Enable feedback submission via `/feedback` across Codex surfaces (default: true).",

171`string (path)`171 },

172 172 {

173Details173 key: "analytics.enabled",

174 174 type: "boolean",

175Path to a TOML config layer for that role; relative paths resolve from the config file that declares the role.175 description:

176 176 "Enable or disable analytics for this machine/profile. When unset, the client default applies.",

177Key177 },

178 178 {

179`agents.<name>.description`179 key: "instructions",

180 180 type: "string",

181Type / Values181 description:

182 182 "Reserved for future use; prefer `model_instructions_file` or `AGENTS.md`.",

183`string`183 },

184 184 {

185Details185 key: "developer_instructions",

186 186 type: "string",

187Role guidance shown to Codex when choosing and spawning that agent type.187 description:

188 188 "Additional developer instructions injected into the session (optional).",

189Key189 },

190 190 {

191`agents.max_threads`191 key: "log_dir",

192 192 type: "string (path)",

193Type / Values193 description:

194 194 "Directory where Codex writes log files (for example `codex-tui.log`); defaults to `$CODEX_HOME/log`.",

195`number`195 },

196 196 {

197Details197 key: "sqlite_home",

198 198 type: "string (path)",

199Maximum number of agent threads that can be open concurrently.199 description:

200 200 "Directory where Codex stores the SQLite-backed state DB used by agent jobs and other resumable runtime state.",

201Key201 },

202 202 {

203`approval_policy`203 key: "compact_prompt",

204 204 type: "string",

205Type / Values205 description: "Inline override for the history compaction prompt.",

206 206 },

207`untrusted | on-request | never`207 {

208 208 key: "commit_attribution",

209Details209 type: "string",

210 210 description:

211Controls when Codex pauses for approval before executing commands. `on-failure` is deprecated; use `on-request` for interactive runs or `never` for non-interactive runs.211 "Override the commit co-author trailer text. Set an empty string to disable automatic attribution.",

212 212 },

213Key213 {

214 214 key: "model_instructions_file",

215`apps.<id>.disabled_reason`215 type: "string (path)",

216 216 description:

217Type / Values217 "Replacement for built-in instructions instead of `AGENTS.md`.",

218 218 },

219`unknown | user`219 {

220 220 key: "personality",

221Details221 type: "none | friendly | pragmatic",

222 222 description:

223Optional reason attached when an app/connector is disabled.223 "Default communication style for models that advertise `supportsPersonality`; can be overridden per thread/turn or via `/personality`.",

224 224 },

225Key225 {

226 226 key: "service_tier",

227`apps.<id>.enabled`227 type: "flex | fast",

228 228 description: "Preferred service tier for new turns.",

229Type / Values229 },

230 230 {

231`boolean`231 key: "experimental_compact_prompt_file",

232 232 type: "string (path)",

233Details233 description:

234 234 "Load the compaction prompt override from a file (experimental).",

235Enable or disable a specific app/connector by id (default: true).235 },

236 236 {

237Key237 key: "skills.config",

238 238 type: "array<object>",

239`chatgpt_base_url`239 description: "Per-skill enablement overrides stored in config.toml.",

240 240 },

241Type / Values241 {

242 242 key: "skills.config.<index>.path",

243`string`243 type: "string (path)",

244 244 description: "Path to a skill folder containing `SKILL.md`.",

245Details245 },

246 246 {

247Override the base URL used during the ChatGPT login flow.247 key: "skills.config.<index>.enabled",

248 248 type: "boolean",

249Key249 description: "Enable or disable the referenced skill.",

250 250 },

251`check_for_update_on_startup`251 {

252 252 key: "apps.<id>.enabled",

253Type / Values253 type: "boolean",

254 254 description:

255`boolean`255 "Enable or disable a specific app/connector by id (default: true).",

256 256 },

257Details257 {

258 258 key: "apps._default.enabled",

259Check for Codex updates on startup (set to false only when updates are centrally managed).259 type: "boolean",

260 260 description:

261Key261 "Default app enabled state for all apps unless overridden per app.",

262 262 },

263`cli_auth_credentials_store`263 {

264 264 key: "apps._default.destructive_enabled",

265Type / Values265 type: "boolean",

266 266 description:

267`file | keyring | auto`267 "Default allow/deny for app tools with `destructive_hint = true`.",

268 268 },

269Details269 {

270 270 key: "apps._default.open_world_enabled",

271Control where the CLI stores cached credentials (file-based auth.json vs OS keychain).271 type: "boolean",

272 272 description:

273Key273 "Default allow/deny for app tools with `open_world_hint = true`.",

274 274 },

275`compact_prompt`275 {

276 276 key: "apps.<id>.destructive_enabled",

277Type / Values277 type: "boolean",

278 278 description:

279`string`279 "Allow or block tools in this app that advertise `destructive_hint = true`.",

280 280 },

281Details281 {

282 282 key: "apps.<id>.open_world_enabled",

283Inline override for the history compaction prompt.283 type: "boolean",

284 284 description:

285Key285 "Allow or block tools in this app that advertise `open_world_hint = true`.",

286 286 },

287`developer_instructions`287 {

288 288 key: "apps.<id>.default_tools_enabled",

289Type / Values289 type: "boolean",

290 290 description:

291`string`291 "Default enabled state for tools in this app unless a per-tool override exists.",

292 292 },

293Details293 {

294 294 key: "apps.<id>.default_tools_approval_mode",

295Additional developer instructions injected into the session (optional).295 type: "auto | prompt | approve",

296 296 description:

297Key297 "Default approval behavior for tools in this app unless a per-tool override exists.",

298 298 },

299`disable_paste_burst`299 {

300 300 key: "apps.<id>.tools.<tool>.enabled",

301Type / Values301 type: "boolean",

302 302 description:

303`boolean`303 "Per-tool enabled override for an app tool (for example `repos/list`).",

304 304 },

305Details305 {

306 306 key: "apps.<id>.tools.<tool>.approval_mode",

307Disable burst-paste detection in the TUI.307 type: "auto | prompt | approve",

308 308 description: "Per-tool approval behavior override for a single app tool.",

309Key309 },

310 310 {

311`experimental_compact_prompt_file`311 key: "tool_suggest.discoverables",

312 312 type: "array<table>",

313Type / Values313 description:

314 314 'Allow tool suggestions for additional discoverable connectors or plugins. Each entry uses `type = "connector"` or `"plugin"` and an `id`.',

315`string (path)`315 },

316 316 {

317Details317 key: "tool_suggest.disabled_tools",

318 318 type: "array<table>",

319Load the compaction prompt override from a file (experimental).319 description:

320 320 'Disable suggestions for specific discoverable connectors or plugins. Each entry uses `type = "connector"` or `"plugin"` and an `id`.',

321Key321 },

322 322 {

323`experimental_use_freeform_apply_patch`323 key: "features.apps",

324 324 type: "boolean",

325Type / Values325 description: "Enable ChatGPT Apps/connectors support (experimental).",

326 326 },

327`boolean`327 {

328 328 key: "features.codex_hooks",

329Details329 type: "boolean",

330 330 description:

331Legacy name for enabling freeform apply\_patch; prefer `[features].apply_patch_freeform` or `codex --enable apply_patch_freeform`.331 "Enable lifecycle hooks loaded from `hooks.json` or inline `[hooks]` config.",

332 332 },

333Key333 {

334 334 key: "hooks",

335`experimental_use_unified_exec_tool`335 type: "table",

336 336 description:

337Type / Values337 "Lifecycle hooks configured inline in `config.toml`. Uses the same event schema as `hooks.json`; see the Hooks guide for examples and supported events.",

338 338 },

339`boolean`339 {

340 340 key: "features.memories",

341Details341 type: "boolean",

342 342 description: "Enable [Memories](https://developers.openai.com/codex/memories) (off by default).",

343Legacy name for enabling unified exec; prefer `[features].unified_exec` or `codex --enable unified_exec`.343 },

344 344 {

345Key345 key: "mcp_servers.<id>.command",

346 346 type: "string",

347`features.apply_patch_freeform`347 description: "Launcher command for an MCP stdio server.",

348 348 },

349Type / Values349 {

350 350 key: "mcp_servers.<id>.args",

351`boolean`351 type: "array<string>",

352 352 description: "Arguments passed to the MCP stdio server command.",

353Details353 },

354 354 {

355Expose the freeform `apply_patch` tool (experimental).355 key: "mcp_servers.<id>.env",

356 356 type: "map<string,string>",

357Key357 description: "Environment variables forwarded to the MCP stdio server.",

358 358 },

359`features.apps`359 {

360 360 key: "mcp_servers.<id>.env_vars",

361Type / Values361 type: 'array<string | { name = string, source = "local" | "remote" }>',

362 362 description:

363`boolean`363 'Additional environment variables to whitelist for an MCP stdio server. String entries default to `source = "local"`; use `source = "remote"` only with executor-backed remote stdio.',

364 364 },

365Details365 {

366 366 key: "mcp_servers.<id>.cwd",

367Enable ChatGPT Apps/connectors support (experimental).367 type: "string",

368 368 description: "Working directory for the MCP stdio server process.",

369Key369 },

370 370 {

371`features.apps_mcp_gateway`371 key: "mcp_servers.<id>.url",

372 372 type: "string",

373Type / Values373 description: "Endpoint for an MCP streamable HTTP server.",

374 374 },

375`boolean`375 {

376 376 key: "mcp_servers.<id>.bearer_token_env_var",

377Details377 type: "string",

378 378 description:

379Route Apps MCP calls through the OpenAI connectors MCP gateway (`https://api.openai.com/v1/connectors/mcp/`) instead of legacy routing (experimental).379 "Environment variable sourcing the bearer token for an MCP HTTP server.",

380 380 },

381Key381 {

382 382 key: "mcp_servers.<id>.http_headers",

383`features.child_agents_md`383 type: "map<string,string>",

384 384 description: "Static HTTP headers included with each MCP HTTP request.",

385Type / Values385 },

386 386 {

387`boolean`387 key: "mcp_servers.<id>.env_http_headers",

388 388 type: "map<string,string>",

389Details389 description:

390 390 "HTTP headers populated from environment variables for an MCP HTTP server.",

391Append AGENTS.md scope/precedence guidance even when no AGENTS.md is present (experimental).391 },

392 392 {

393Key393 key: "mcp_servers.<id>.enabled",

394 394 type: "boolean",

395`features.collaboration_modes`395 description: "Disable an MCP server without removing its configuration.",

396 396 },

397Type / Values397 {

398 398 key: "mcp_servers.<id>.required",

399`boolean`399 type: "boolean",

400 400 description:

401Details401 "When true, fail startup/resume if this enabled MCP server cannot initialize.",

402 402 },

403Enable collaboration modes such as plan mode (stable; on by default).403 {

404 404 key: "mcp_servers.<id>.startup_timeout_sec",

405Key405 type: "number",

406 406 description:

407`features.elevated_windows_sandbox`407 "Override the default 10s startup timeout for an MCP server.",

408 408 },

409Type / Values409 {

410 410 key: "mcp_servers.<id>.startup_timeout_ms",

411`boolean`411 type: "number",

412 412 description: "Alias for `startup_timeout_sec` in milliseconds.",

413Details413 },

414 414 {

415Enable the elevated Windows sandbox pipeline (experimental).415 key: "mcp_servers.<id>.tool_timeout_sec",

416 416 type: "number",

417Key417 description:

418 418 "Override the default 60s per-tool timeout for an MCP server.",

419`features.experimental_windows_sandbox`419 },

420 420 {

421Type / Values421 key: "mcp_servers.<id>.enabled_tools",

422 422 type: "array<string>",

423`boolean`423 description: "Allow list of tool names exposed by the MCP server.",

424 424 },

425Details425 {

426 426 key: "mcp_servers.<id>.disabled_tools",

427Run the Windows restricted-token sandbox (experimental).427 type: "array<string>",

428 428 description:

429Key429 "Deny list applied after `enabled_tools` for the MCP server.",

430 430 },

431`features.multi_agent`431 {

432 432 key: "mcp_servers.<id>.scopes",

433Type / Values433 type: "array<string>",

434 434 description:

435`boolean`435 "OAuth scopes to request when authenticating to that MCP server.",

436 436 },

437Details437 {

438 438 key: "mcp_servers.<id>.oauth_resource",

439Enable multi-agent collaboration tools (`spawn\_agent`, `send\_input`, `resume\_agent`, `wait`, and `close\_agent`) (experimental; off by default).439 type: "string",

440 440 description:

441Key441 "Optional RFC 8707 OAuth resource parameter to include during MCP login.",

442 442 },

443`features.personality`443 {

444 444 key: "mcp_servers.<id>.experimental_environment",

445Type / Values445 type: "local | remote",

446 446 description:

447`boolean`447 "Experimental placement for an MCP server. `remote` starts stdio servers through a remote executor environment; streamable HTTP remote placement is not implemented.",

448 448 },

449Details449 {

450 450 key: "agents.max_threads",

451Enable personality selection controls (stable; on by default).451 type: "number",

452 452 description:

453Key453 "Maximum number of agent threads that can be open concurrently. Defaults to `6` when unset.",

454 454 },

455`features.powershell_utf8`455 {

456 456 key: "agents.max_depth",

457Type / Values457 type: "number",

458 458 description:

459`boolean`459 "Maximum nesting depth allowed for spawned agent threads (root sessions start at depth 0; default: 1).",

460 460 },

461Details461 {

462 462 key: "agents.job_max_runtime_seconds",

463Force PowerShell UTF-8 output (defaults to true).463 type: "number",

464 464 description:

465Key465 "Default per-worker timeout for `spawn_agents_on_csv` jobs. When unset, the tool falls back to 1800 seconds per worker.",

466 466 },

467`features.remote_models`467 {

468 468 key: "agents.<name>.description",

469Type / Values469 type: "string",

470 470 description:

471`boolean`471 "Role guidance shown to Codex when choosing and spawning that agent type.",

472 472 },

473Details473 {

474 474 key: "agents.<name>.config_file",

475Refresh remote model list before showing readiness (experimental).475 type: "string (path)",

476 476 description:

477Key477 "Path to a TOML config layer for that role; relative paths resolve from the config file that declares the role.",

478 478 },

479`features.request_rule`479 {

480 480 key: "agents.<name>.nickname_candidates",

481Type / Values481 type: "array<string>",

482 482 description:

483`boolean`483 "Optional pool of display nicknames for spawned agents in that role.",

484 484 },

485Details485 {

486 486 key: "memories.generate_memories",

487Enable Smart approvals (`prefix_rule` suggestions on escalation requests; stable; on by default).487 type: "boolean",

488 488 description:

489Key489 "When `false`, newly created threads are not stored as memory-generation inputs. Defaults to `true`.",

490 490 },

491`features.runtime_metrics`491 {

492 492 key: "memories.use_memories",

493Type / Values493 type: "boolean",

494 494 description:

495`boolean`495 "When `false`, Codex skips injecting existing memories into future sessions. Defaults to `true`.",

496 496 },

497Details497 {

498 498 key: "memories.disable_on_external_context",

499Show runtime metrics summary in TUI turn separators (experimental).499 type: "boolean",

500 500 description:

501Key501 "When `true`, threads that use external context such as MCP tool calls, web search, or tool search are kept out of memory generation. Defaults to `false`. Legacy alias: `memories.no_memories_if_mcp_or_web_search`.",

502 502 },

503`features.search_tool`503 {

504 504 key: "memories.max_raw_memories_for_consolidation",

505Type / Values505 type: "number",

506 506 description:

507`boolean`507 "Maximum recent raw memories retained for global consolidation. Defaults to `256` and is capped at `4096`.",

508 508 },

509Details509 {

510 510 key: "memories.max_unused_days",

511Enable `search_tool_bm25` for Apps tool discovery before invoking app MCP tools (experimental).511 type: "number",

512 512 description:

513Key513 "Maximum days since a memory was last used before it becomes ineligible for consolidation. Defaults to `30` and is clamped to `0`-`365`.",

514 514 },

515`features.shell_snapshot`515 {

516 516 key: "memories.max_rollout_age_days",

517Type / Values517 type: "number",

518 518 description:

519`boolean`519 "Maximum age of threads considered for memory generation. Defaults to `30` and is clamped to `0`-`90`.",

520 520 },

521Details521 {

522 522 key: "memories.max_rollouts_per_startup",

523Snapshot shell environment to speed up repeated commands (beta).523 type: "number",

524 524 description:

525Key525 "Maximum rollout candidates processed per startup pass. Defaults to `16` and is capped at `128`.",

526 526 },

527`features.shell_tool`527 {

528 528 key: "memories.min_rollout_idle_hours",

529Type / Values529 type: "number",

530 530 description:

531`boolean`531 "Minimum idle time before a thread is considered for memory generation. Defaults to `6` and is clamped to `1`-`48`.",

532 532 },

533Details533 {

534 534 key: "memories.min_rate_limit_remaining_percent",

535Enable the default `shell` tool for running commands (stable; on by default).535 type: "number",

536 536 description:

537Key537 "Minimum remaining percentage required in Codex rate-limit windows before memory generation starts. Defaults to `25` and is clamped to `0`-`100`.",

538 538 },

539`features.unified_exec`539 {

540 540 key: "memories.extract_model",

541Type / Values541 type: "string",

542 542 description: "Optional model override for per-thread memory extraction.",

543`boolean`543 },

544 544 {

545Details545 key: "memories.consolidation_model",

546 546 type: "string",

547Use the unified PTY-backed exec tool (beta).547 description: "Optional model override for global memory consolidation.",

548 548 },

549Key549 {

550 550 key: "features.unified_exec",

551`features.use_linux_sandbox_bwrap`551 type: "boolean",

552 552 description:

553Type / Values553 "Use the unified PTY-backed exec tool (stable; enabled by default except on Windows).",

554 554 },

555`boolean`555 {

556 556 key: "features.shell_snapshot",

557Details557 type: "boolean",

558 558 description:

559Use the bubblewrap-based Linux sandbox pipeline (experimental; off by default).559 "Snapshot shell environment to speed up repeated commands (stable; on by default).",

560 560 },

561Key561 {

562 562 key: "features.undo",

563`features.web_search`563 type: "boolean",

564 564 description: "Enable undo support (stable; off by default).",

565Type / Values565 },

566 566 {

567`boolean`567 key: "features.multi_agent",

568 568 type: "boolean",

569Details569 description:

570 570 "Enable multi-agent collaboration tools (`spawn_agent`, `send_input`, `resume_agent`, `wait_agent`, and `close_agent`) (stable; on by default).",

571Deprecated legacy toggle; prefer the top-level `web_search` setting.571 },

572 572 {

573Key573 key: "features.personality",

574 574 type: "boolean",

575`features.web_search_cached`575 description:

576 576 "Enable personality selection controls (stable; on by default).",

577Type / Values577 },

578 578 {

579`boolean`579 key: "features.web_search",

580 580 type: "boolean",

581Details581 description:

582 582 "Deprecated legacy toggle; prefer the top-level `web_search` setting.",

583Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "cached"`.583 },

584 584 {

585Key585 key: "features.web_search_cached",

586 586 type: "boolean",

587`features.web_search_request`587 description:

588 588 'Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "cached"`.',

589Type / Values589 },

590 590 {

591`boolean`591 key: "features.web_search_request",

592 592 type: "boolean",

593Details593 description:

594 594 'Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "live"`.',

595Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "live"`.595 },

596 596 {

597Key597 key: "features.shell_tool",

598 598 type: "boolean",

599`feedback.enabled`599 description:

600 600 "Enable the default `shell` tool for running commands (stable; on by default).",

601Type / Values601 },

602 602 {

603`boolean`603 key: "features.enable_request_compression",

604 604 type: "boolean",

605Details605 description:

606 606 "Compress streaming request bodies with zstd when supported (stable; on by default).",

607Enable feedback submission via `/feedback` across Codex surfaces (default: true).607 },

608 608 {

609Key609 key: "features.skill_mcp_dependency_install",

610 610 type: "boolean",

611`file_opener`611 description:

612 612 "Allow prompting and installing missing MCP dependencies for skills (stable; on by default).",

613Type / Values613 },

614 614 {

615`vscode | vscode-insiders | windsurf | cursor | none`615 key: "features.fast_mode",

616 616 type: "boolean",

617Details617 description:

618 618 'Enable Fast mode selection and the `service_tier = "fast"` path (stable; on by default).',

619URI scheme used to open citations from Codex output (default: `vscode`).619 },

620 620 {

621Key621 key: "features.prevent_idle_sleep",

622 622 type: "boolean",

623`forced_chatgpt_workspace_id`623 description:

624 624 "Prevent the machine from sleeping while a turn is actively running (experimental; off by default).",

625Type / Values625 },

626 626 {

627`string (uuid)`627 key: "suppress_unstable_features_warning",

628 628 type: "boolean",

629Details629 description:

630 630 "Suppress the warning that appears when under-development feature flags are enabled.",

631Limit ChatGPT logins to a specific workspace identifier.631 },

632 632 {

633Key633 key: "model_providers.<id>",

634 634 type: "table",

635`forced_login_method`635 description:

636 636 "Custom provider definition. Built-in provider IDs (`openai`, `ollama`, and `lmstudio`) are reserved and cannot be overridden.",

637Type / Values637 },

638 638 {

639`chatgpt | api`639 key: "model_providers.<id>.name",

640 640 type: "string",

641Details641 description: "Display name for a custom model provider.",

642 642 },

643Restrict Codex to a specific authentication method.643 {

644 644 key: "model_providers.<id>.base_url",

645Key645 type: "string",

646 646 description: "API base URL for the model provider.",

647`hide_agent_reasoning`647 },

648 648 {

649Type / Values649 key: "model_providers.<id>.env_key",

650 650 type: "string",

651`boolean`651 description: "Environment variable supplying the provider API key.",

652 652 },

653Details653 {

654 654 key: "model_providers.<id>.env_key_instructions",

655Suppress reasoning events in both the TUI and `codex exec` output.655 type: "string",

656 656 description: "Optional setup guidance for the provider API key.",

657Key657 },

658 658 {

659`history.max_bytes`659 key: "model_providers.<id>.experimental_bearer_token",

660 660 type: "string",

661Type / Values661 description:

662 662 "Direct bearer token for the provider (discouraged; use `env_key`).",

663`number`663 },

664 664 {

665Details665 key: "model_providers.<id>.requires_openai_auth",

666 666 type: "boolean",

667If set, caps the history file size in bytes by dropping oldest entries.667 description:

668 668 "The provider uses OpenAI authentication (defaults to false).",

669Key669 },

670 670 {

671`history.persistence`671 key: "model_providers.<id>.wire_api",

672 672 type: "responses",

673Type / Values673 description:

674 674 "Protocol used by the provider. `responses` is the only supported value, and it is the default when omitted.",

675`save-all | none`675 },

676 676 {

677Details677 key: "model_providers.<id>.query_params",

678 678 type: "map<string,string>",

679Control whether Codex saves session transcripts to history.jsonl.679 description: "Extra query parameters appended to provider requests.",

680 680 },

681Key681 {

682 682 key: "model_providers.<id>.http_headers",

683`include_apply_patch_tool`683 type: "map<string,string>",

684 684 description: "Static HTTP headers added to provider requests.",

685Type / Values685 },

686 686 {

687`boolean`687 key: "model_providers.<id>.env_http_headers",

688 688 type: "map<string,string>",

689Details689 description:

690 690 "HTTP headers populated from environment variables when present.",

691Legacy name for enabling freeform apply\_patch; prefer `[features].apply_patch_freeform`.691 },

692 692 {

693Key693 key: "model_providers.<id>.request_max_retries",

694 694 type: "number",

695`instructions`695 description:

696 696 "Retry count for HTTP requests to the provider (default: 4).",

697Type / Values697 },

698 698 {

699`string`699 key: "model_providers.<id>.stream_max_retries",

700 700 type: "number",

701Details701 description: "Retry count for SSE streaming interruptions (default: 5).",

702 702 },

703Reserved for future use; prefer `model_instructions_file` or `AGENTS.md`.703 {

704 704 key: "model_providers.<id>.stream_idle_timeout_ms",

705Key705 type: "number",

706 706 description:

707`log_dir`707 "Idle timeout for SSE streams in milliseconds (default: 300000).",

708 708 },

709Type / Values709 {

710 710 key: "model_providers.<id>.supports_websockets",

711`string (path)`711 type: "boolean",

712 712 description:

713Details713 "Whether that provider supports the Responses API WebSocket transport.",

714 714 },

715Directory where Codex writes log files (for example `codex-tui.log`); defaults to `$CODEX_HOME/log`.715 {

716 716 key: "model_providers.<id>.auth",

717Key717 type: "table",

718 718 description:

719`mcp_oauth_callback_port`719 "Command-backed bearer token configuration for a custom provider. Do not combine with `env_key`, `experimental_bearer_token`, or `requires_openai_auth`.",

720 720 },

721Type / Values721 {

722 722 key: "model_providers.<id>.auth.command",

723`integer`723 type: "string",

724 724 description:

725Details725 "Command to run when Codex needs a bearer token. The command must print the token to stdout.",

726 726 },

727Optional fixed port for the local HTTP callback server used during MCP OAuth login. When unset, Codex binds to an ephemeral port chosen by the OS.727 {

728 728 key: "model_providers.<id>.auth.args",

729Key729 type: "array<string>",

730 730 description: "Arguments passed to the token command.",

731`mcp_oauth_credentials_store`731 },

732 732 {

733Type / Values733 key: "model_providers.<id>.auth.timeout_ms",

734 734 type: "number",

735`auto | file | keyring`735 description:

736 736 "Maximum token command runtime in milliseconds (default: 5000).",

737Details737 },

738 738 {

739Preferred store for MCP OAuth credentials.739 key: "model_providers.<id>.auth.refresh_interval_ms",

740 740 type: "number",

741Key741 description:

742 742 "How often Codex proactively refreshes the token in milliseconds (default: 300000). Set to `0` to refresh only after an authentication retry.",

743`mcp_servers.<id>.args`743 },

744 744 {

745Type / Values745 key: "model_providers.<id>.auth.cwd",

746 746 type: "string (path)",

747`array<string>`747 description: "Working directory for the token command.",

748 748 },

749Details749 {

750 750 key: "model_providers.amazon-bedrock.aws.profile",

751Arguments passed to the MCP stdio server command.751 type: "string",

752 752 description:

753Key753 "AWS profile name used by the built-in `amazon-bedrock` provider.",

754 754 },

755`mcp_servers.<id>.bearer_token_env_var`755 {

756 756 key: "model_providers.amazon-bedrock.aws.region",

757Type / Values757 type: "string",

758 758 description: "AWS region used by the built-in `amazon-bedrock` provider.",

759`string`759 },

760 760 {

761Details761 key: "model_reasoning_effort",

762 762 type: "minimal | low | medium | high | xhigh",

763Environment variable sourcing the bearer token for an MCP HTTP server.763 description:

764 764 "Adjust reasoning effort for supported models (Responses API only; `xhigh` is model-dependent).",

765Key765 },

766 766 {

767`mcp_servers.<id>.command`767 key: "plan_mode_reasoning_effort",

768 768 type: "none | minimal | low | medium | high | xhigh",

769Type / Values769 description:

770 770 "Plan-mode-specific reasoning override. When unset, Plan mode uses its built-in preset default.",

771`string`771 },

772 772 {

773Details773 key: "model_reasoning_summary",

774 774 type: "auto | concise | detailed | none",

775Launcher command for an MCP stdio server.775 description:

776 776 "Select reasoning summary detail or disable summaries entirely.",

777Key777 },

778 778 {

779`mcp_servers.<id>.cwd`779 key: "model_verbosity",

780 780 type: "low | medium | high",

781Type / Values781 description:

782 782 "Optional GPT-5 Responses API verbosity override; when unset, the selected model/preset default is used.",

783`string`783 },

784 784 {

785Details785 key: "model_supports_reasoning_summaries",

786 786 type: "boolean",

787Working directory for the MCP stdio server process.787 description: "Force Codex to send or not send reasoning metadata.",

788 788 },

789Key789 {

790 790 key: "shell_environment_policy.inherit",

791`mcp_servers.<id>.disabled_tools`791 type: "all | core | none",

792 792 description:

793Type / Values793 "Baseline environment inheritance when spawning subprocesses.",

794 794 },

795`array<string>`795 {

796 796 key: "shell_environment_policy.ignore_default_excludes",

797Details797 type: "boolean",

798 798 description:

799Deny list applied after `enabled_tools` for the MCP server.799 "Keep variables containing KEY/SECRET/TOKEN before other filters run.",

800 800 },

801Key801 {

802 802 key: "shell_environment_policy.exclude",

803`mcp_servers.<id>.enabled`803 type: "array<string>",

804 804 description:

805Type / Values805 "Glob patterns for removing environment variables after the defaults.",

806 806 },

807`boolean`807 {

808 808 key: "shell_environment_policy.include_only",

809Details809 type: "array<string>",

810 810 description:

811Disable an MCP server without removing its configuration.811 "Whitelist of patterns; when set only matching variables are kept.",

812 812 },

813Key813 {

814 814 key: "shell_environment_policy.set",

815`mcp_servers.<id>.enabled_tools`815 type: "map<string,string>",

816 816 description:

817Type / Values817 "Explicit environment overrides injected into every subprocess.",

818 818 },

819`array<string>`819 {

820 820 key: "shell_environment_policy.experimental_use_profile",

821Details821 type: "boolean",

822 822 description: "Use the user shell profile when spawning subprocesses.",

823Allow list of tool names exposed by the MCP server.823 },

824 824 {

825Key825 key: "project_root_markers",

826 826 type: "array<string>",

827`mcp_servers.<id>.env`827 description:

828 828 "List of project root marker filenames; used when searching parent directories for the project root.",

829Type / Values829 },

830 830 {

831`map<string,string>`831 key: "project_doc_max_bytes",

832 832 type: "number",

833Details833 description:

834 834 "Maximum bytes read from `AGENTS.md` when building project instructions.",

835Environment variables forwarded to the MCP stdio server.835 },

836 836 {

837Key837 key: "project_doc_fallback_filenames",

838 838 type: "array<string>",

839`mcp_servers.<id>.env_http_headers`839 description: "Additional filenames to try when `AGENTS.md` is missing.",

840 840 },

841Type / Values841 {

842 842 key: "profile",