config-reference.md Codex Docs, 2026-03-13 18:15 UTC → 2026-05-11 18:00 UTC

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/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).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.<name>.nickname_candidates` | `array<string>` | Optional pool of display nicknames for spawned agents in that role. |15 type: "string",

16| `agents.job_max_runtime_seconds` | `number` | Default per-worker timeout for `spawn_agents_on_csv` jobs. When unset, the tool falls back to 1800 seconds per worker. |16 description: "Model to use (e.g., `gpt-5.5`).",

17| `agents.max_depth` | `number` | Maximum nesting depth allowed for spawned agent threads (root sessions start at depth 0; default: 1). |17 },

18| `agents.max_threads` | `number` | Maximum number of agent threads that can be open concurrently. Defaults to `6` when unset. |18 {

19| `allow_login_shell` | `boolean` | 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. |19 key: "review_model",

20| `analytics.enabled` | `boolean` | Enable or disable analytics for this machine/profile. When unset, the client default applies. |20 type: "string",

21| `approval_policy` | `untrusted | on-request | never | { reject = { sandbox_approval = bool, rules = bool, mcp_elicitations = bool } }` | Controls when Codex pauses for approval before executing commands. You can also use `approval_policy = { reject = { ... } }` to 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. |21 description:

22| `approval_policy.reject.mcp_elicitations` | `boolean` | When `true`, MCP elicitation prompts are auto-rejected instead of shown to the user. |22 "Optional model override used by `/review` (defaults to the current session model).",

23| `approval_policy.reject.rules` | `boolean` | When `true`, approvals triggered by execpolicy `prompt` rules are auto-rejected. |23 },

24| `approval_policy.reject.sandbox_approval` | `boolean` | When `true`, sandbox escalation approval prompts are auto-rejected. |24 {

25| `apps._default.destructive_enabled` | `boolean` | Default allow/deny for app tools with `destructive_hint = true`. |25 key: "model_provider",

26| `apps._default.enabled` | `boolean` | Default app enabled state for all apps unless overridden per app. |26 type: "string",

27| `apps._default.open_world_enabled` | `boolean` | Default allow/deny for app tools with `open_world_hint = true`. |27 description: "Provider id from `model_providers` (default: `openai`).",

28| `apps.<id>.default_tools_approval_mode` | `auto | prompt | approve` | Default approval behavior for tools in this app unless a per-tool override exists. |28 },

29| `apps.<id>.default_tools_enabled` | `boolean` | Default enabled state for tools in this app unless a per-tool override exists. |29 {

30| `apps.<id>.destructive_enabled` | `boolean` | Allow or block tools in this app that advertise `destructive_hint = true`. |30 key: "openai_base_url",

31| `apps.<id>.enabled` | `boolean` | Enable or disable a specific app/connector by id (default: true). |31 type: "string",

32| `apps.<id>.open_world_enabled` | `boolean` | Allow or block tools in this app that advertise `open_world_hint = true`. |32 description:

33| `apps.<id>.tools.<tool>.approval_mode` | `auto | prompt | approve` | Per-tool approval behavior override for a single app tool. |33 "Base URL override for the built-in `openai` model provider.",

34| `apps.<id>.tools.<tool>.enabled` | `boolean` | Per-tool enabled override for an app tool (for example `repos/list`). |34 },

35| `background_terminal_max_timeout` | `number` | Maximum poll window in milliseconds for empty `write_stdin` polls (background terminal polling). Default: `300000` (5 minutes). Replaces the older `background_terminal_timeout` key. |35 {

36| `chatgpt_base_url` | `string` | Override the base URL used during the ChatGPT login flow. |36 key: "model_context_window",

37| `check_for_update_on_startup` | `boolean` | Check for Codex updates on startup (set to false only when updates are centrally managed). |37 type: "number",

38| `cli_auth_credentials_store` | `file | keyring | auto` | Control where the CLI stores cached credentials (file-based auth.json vs OS keychain). |38 description: "Context window tokens available to the active model.",

39| `commit_attribution` | `string` | Override the commit co-author trailer text. Set an empty string to disable automatic attribution. |39 },

40| `compact_prompt` | `string` | Inline override for the history compaction prompt. |40 {

41| `developer_instructions` | `string` | Additional developer instructions injected into the session (optional). |41 key: "model_auto_compact_token_limit",

42| `disable_paste_burst` | `boolean` | Disable burst-paste detection in the TUI. |42 type: "number",

43| `experimental_compact_prompt_file` | `string (path)` | Load the compaction prompt override from a file (experimental). |43 description:

44| `experimental_use_unified_exec_tool` | `boolean` | Legacy name for enabling unified exec; prefer `[features].unified_exec` or `codex --enable unified_exec`. |44 "Token threshold that triggers automatic history compaction (unset uses model defaults).",

45| `features.apps` | `boolean` | Enable ChatGPT Apps/connectors support (experimental). |45 },

46| `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). |46 {

47| `features.artifact` | `boolean` | Enable native artifact tools such as slides and spreadsheets (under development). |47 key: "model_catalog_json",

48| `features.child_agents_md` | `boolean` | Append AGENTS.md scope/precedence guidance even when no AGENTS.md is present (experimental). |48 type: "string (path)",

49| `features.collaboration_modes` | `boolean` | Legacy toggle for collaboration modes. Plan and default modes are available in current builds without setting this key. |49 description:

50| `features.default_mode_request_user_input` | `boolean` | Allow `request_user_input` in default collaboration mode (under development; off by default). |50 "Optional path to a JSON model catalog loaded on startup. Profile-level `profiles.<name>.model_catalog_json` can override this per profile.",

51| `features.elevated_windows_sandbox` | `boolean` | Legacy toggle for an earlier elevated Windows sandbox rollout. Current builds do not use it. |51 },

52| `features.enable_request_compression` | `boolean` | Compress streaming request bodies with zstd when supported (stable; on by default). |52 {

53| `features.experimental_windows_sandbox` | `boolean` | Legacy toggle for an earlier Windows sandbox rollout. Current builds do not use it. |53 key: "oss_provider",

54| `features.fast_mode` | `boolean` | Enable Fast mode selection and the `service_tier = "fast"` path (stable; on by default). |54 type: "lmstudio | ollama",

55| `features.image_detail_original` | `boolean` | Allow image outputs with `detail = "original"` on supported models (under development). |55 description:

56| `features.image_generation` | `boolean` | Enable the built-in image generation tool (under development). |56 "Default local provider used when running with `--oss` (defaults to prompting if unset).",

57| `features.multi_agent` | `boolean` | Enable multi-agent collaboration tools (`spawn_agent`, `send_input`, `resume_agent`, `wait`, `close_agent`, and `spawn_agents_on_csv`) (experimental; off by default). |57 },

58| `features.personality` | `boolean` | Enable personality selection controls (stable; on by default). |58 {

59| `features.powershell_utf8` | `boolean` | Force PowerShell UTF-8 output. Enabled by default on Windows and off elsewhere. |59 key: "approval_policy",

60| `features.prevent_idle_sleep` | `boolean` | Prevent the machine from sleeping while a turn is actively running (experimental; off by default). |60 type: "untrusted | on-request | never | { granular = { sandbox_approval = bool, rules = bool, mcp_elicitations = bool, request_permissions = bool, skill_approval = bool } }",

61| `features.remote_models` | `boolean` | Legacy toggle for an older remote-model readiness flow. Current builds do not use it. |61 description:

62| `features.request_rule` | `boolean` | Legacy toggle for Smart approvals. Current builds include this behavior by default, so most users can leave this unset. |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| `features.responses_websockets` | `boolean` | Prefer the Responses API WebSocket transport for supported providers (under development). |63 },

64| `features.responses_websockets_v2` | `boolean` | Enable Responses API WebSocket v2 mode (under development). |64 {

65| `features.runtime_metrics` | `boolean` | Show runtime metrics summary in TUI turn separators (experimental). |65 key: "approval_policy.granular.sandbox_approval",

66| `features.search_tool` | `boolean` | Legacy toggle for an older Apps discovery flow. Current builds do not use it. |66 type: "boolean",

67| `features.shell_snapshot` | `boolean` | Snapshot shell environment to speed up repeated commands (stable; on by default). |67 description:

68| `features.shell_tool` | `boolean` | Enable the default `shell` tool for running commands (stable; on by default). |68 "When `true`, sandbox escalation approval prompts are allowed to surface.",

69| `features.skill_env_var_dependency_prompt` | `boolean` | Prompt for missing skill environment-variable dependencies (under development). |69 },

70| `features.skill_mcp_dependency_install` | `boolean` | Allow prompting and installing missing MCP dependencies for skills (stable; on by default). |70 {

71| `features.sqlite` | `boolean` | Enable SQLite-backed state persistence (stable; on by default). |71 key: "approval_policy.granular.rules",

72| `features.steer` | `boolean` | Legacy toggle from an earlier Enter/Tab steering rollout. Current builds always use the current steering behavior. |72 type: "boolean",

73| `features.undo` | `boolean` | Enable undo support (stable; off by default). |73 description:

74| `features.unified_exec` | `boolean` | Use the unified PTY-backed exec tool (stable; enabled by default except on Windows). |74 "When `true`, approvals triggered by execpolicy `prompt` rules are allowed to surface.",

75| `features.use_linux_sandbox_bwrap` | `boolean` | Use the bubblewrap-based Linux sandbox pipeline (experimental; off by default). |75 },

76| `features.web_search` | `boolean` | Deprecated legacy toggle; prefer the top-level `web_search` setting. |76 {

77| `features.web_search_cached` | `boolean` | Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "cached"`. |77 key: "approval_policy.granular.mcp_elicitations",

78| `features.web_search_request` | `boolean` | Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "live"`. |78 type: "boolean",

79| `feedback.enabled` | `boolean` | Enable feedback submission via `/feedback` across Codex surfaces (default: true). |79 description:

80| `file_opener` | `vscode | vscode-insiders | windsurf | cursor | none` | URI scheme used to open citations from Codex output (default: `vscode`). |80 "When `true`, MCP elicitation prompts are allowed to surface instead of being auto-rejected.",

81| `forced_chatgpt_workspace_id` | `string (uuid)` | Limit ChatGPT logins to a specific workspace identifier. |81 },

82| `forced_login_method` | `chatgpt | api` | Restrict Codex to a specific authentication method. |82 {

83| `hide_agent_reasoning` | `boolean` | Suppress reasoning events in both the TUI and `codex exec` output. |83 key: "approval_policy.granular.request_permissions",

84| `history.max_bytes` | `number` | If set, caps the history file size in bytes by dropping oldest entries. |84 type: "boolean",

85| `history.persistence` | `save-all | none` | Control whether Codex saves session transcripts to history.jsonl. |85 description:

86| `instructions` | `string` | Reserved for future use; prefer `model_instructions_file` or `AGENTS.md`. |86 "When `true`, prompts from the `request_permissions` tool are allowed to surface.",

87| `log_dir` | `string (path)` | Directory where Codex writes log files (for example `codex-tui.log`); defaults to `$CODEX_HOME/log`. |87 },

88| `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. |88 {

89| `mcp_oauth_callback_url` | `string` | Optional redirect URI override for MCP OAuth login (for example, a devbox ingress URL). `mcp_oauth_callback_port` still controls the callback listener port. |89 key: "approval_policy.granular.skill_approval",

90| `mcp_oauth_credentials_store` | `auto | file | keyring` | Preferred store for MCP OAuth credentials. |90 type: "boolean",

91| `mcp_servers.<id>.args` | `array<string>` | Arguments passed to the MCP stdio server command. |91 description:

92| `mcp_servers.<id>.bearer_token_env_var` | `string` | Environment variable sourcing the bearer token for an MCP HTTP server. |92 "When `true`, skill-script approval prompts are allowed to surface.",

93| `mcp_servers.<id>.command` | `string` | Launcher command for an MCP stdio server. |93 },

94| `mcp_servers.<id>.cwd` | `string` | Working directory for the MCP stdio server process. |94 {

95| `mcp_servers.<id>.disabled_tools` | `array<string>` | Deny list applied after `enabled_tools` for the MCP server. |95 key: "approvals_reviewer",

96| `mcp_servers.<id>.enabled` | `boolean` | Disable an MCP server without removing its configuration. |96 type: "user | auto_review",

97| `mcp_servers.<id>.enabled_tools` | `array<string>` | Allow list of tool names exposed by the MCP server. |97 description:

98| `mcp_servers.<id>.env` | `map<string,string>` | Environment variables forwarded to the MCP stdio server. |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| `mcp_servers.<id>.env_http_headers` | `map<string,string>` | HTTP headers populated from environment variables for an MCP HTTP server. |99 },

100| `mcp_servers.<id>.env_vars` | `array<string>` | Additional environment variables to whitelist for an MCP stdio server. |100 {

101| `mcp_servers.<id>.http_headers` | `map<string,string>` | Static HTTP headers included with each MCP HTTP request. |101 key: "auto_review.policy",

102| `mcp_servers.<id>.oauth_resource` | `string` | Optional RFC 8707 OAuth resource parameter to include during MCP login. |102 type: "string",

103| `mcp_servers.<id>.required` | `boolean` | When true, fail startup/resume if this enabled MCP server cannot initialize. |103 description:

104| `mcp_servers.<id>.scopes` | `array<string>` | OAuth scopes to request when authenticating to that MCP server. |104 "Local Markdown policy instructions for automatic review. Managed `guardian_policy_config` takes precedence. Blank values are ignored.",

105| `mcp_servers.<id>.startup_timeout_ms` | `number` | Alias for `startup_timeout_sec` in milliseconds. |105 },

106| `mcp_servers.<id>.startup_timeout_sec` | `number` | Override the default 10s startup timeout for an MCP server. |106 {

107| `mcp_servers.<id>.tool_timeout_sec` | `number` | Override the default 60s per-tool timeout for an MCP server. |107 key: "allow_login_shell",

108| `mcp_servers.<id>.url` | `string` | Endpoint for an MCP streamable HTTP server. |108 type: "boolean",

109| `model` | `string` | Model to use (e.g., `gpt-5-codex`). |109 description:

110| `model_auto_compact_token_limit` | `number` | Token threshold that triggers automatic history compaction (unset uses model defaults). |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| `model_catalog_json` | `string (path)` | Optional path to a JSON model catalog loaded on startup. Profile-level `profiles.<name>.model_catalog_json` can override this per profile. |111 },

112| `model_context_window` | `number` | Context window tokens available to the active model. |112 {

113| `model_instructions_file` | `string (path)` | Replacement for built-in instructions instead of `AGENTS.md`. |113 key: "sandbox_mode",

114| `model_provider` | `string` | Provider id from `model_providers` (default: `openai`). |114 type: "read-only | workspace-write | danger-full-access",

115| `model_providers.<id>.base_url` | `string` | API base URL for the model provider. |115 description:

116| `model_providers.<id>.env_http_headers` | `map<string,string>` | HTTP headers populated from environment variables when present. |116 "Sandbox policy for filesystem and network access during command execution.",

117| `model_providers.<id>.env_key` | `string` | Environment variable supplying the provider API key. |117 },

118| `model_providers.<id>.env_key_instructions` | `string` | Optional setup guidance for the provider API key. |118 {

119| `model_providers.<id>.experimental_bearer_token` | `string` | Direct bearer token for the provider (discouraged; use `env_key`). |119 key: "sandbox_workspace_write.writable_roots",

120| `model_providers.<id>.http_headers` | `map<string,string>` | Static HTTP headers added to provider requests. |120 type: "array<string>",

121| `model_providers.<id>.name` | `string` | Display name for a custom model provider. |121 description:

122| `model_providers.<id>.query_params` | `map<string,string>` | Extra query parameters appended to provider requests. |122 'Additional writable roots when `sandbox_mode = "workspace-write"`.',

123| `model_providers.<id>.request_max_retries` | `number` | Retry count for HTTP requests to the provider (default: 4). |123 },

124| `model_providers.<id>.requires_openai_auth` | `boolean` | The provider uses OpenAI authentication (defaults to false). |124 {

125| `model_providers.<id>.stream_idle_timeout_ms` | `number` | Idle timeout for SSE streams in milliseconds (default: 300000). |125 key: "sandbox_workspace_write.network_access",

126| `model_providers.<id>.stream_max_retries` | `number` | Retry count for SSE streaming interruptions (default: 5). |126 type: "boolean",

127| `model_providers.<id>.supports_websockets` | `boolean` | Whether that provider supports the Responses API WebSocket transport. |127 description:

128| `model_providers.<id>.wire_api` | `responses` | Protocol used by the provider. `responses` is the only supported value, and it is the default when omitted. |128 "Allow outbound network access inside the workspace-write sandbox.",

129| `model_reasoning_effort` | `minimal | low | medium | high | xhigh` | Adjust reasoning effort for supported models (Responses API only; `xhigh` is model-dependent). |129 },

130| `model_reasoning_summary` | `auto | concise | detailed | none` | Select reasoning summary detail or disable summaries entirely. |130 {

131| `model_supports_reasoning_summaries` | `boolean` | Force Codex to send or not send reasoning metadata. |131 key: "sandbox_workspace_write.exclude_tmpdir_env_var",

132| `model_verbosity` | `low | medium | high` | Optional GPT-5 Responses API verbosity override; when unset, the selected model/preset default is used. |132 type: "boolean",

133| `notice.hide_full_access_warning` | `boolean` | Track acknowledgement of the full access warning prompt. |133 description:

134| `notice.hide_gpt-5.1-codex-max_migration_prompt` | `boolean` | Track acknowledgement of the gpt-5.1-codex-max migration prompt. |134 "Exclude `$TMPDIR` from writable roots in workspace-write mode.",

135| `notice.hide_gpt5_1_migration_prompt` | `boolean` | Track acknowledgement of the GPT-5.1 migration prompt. |135 },

136| `notice.hide_rate_limit_model_nudge` | `boolean` | Track opt-out of the rate limit model switch reminder. |136 {

137| `notice.hide_world_writable_warning` | `boolean` | Track acknowledgement of the Windows world-writable directories warning. |137 key: "sandbox_workspace_write.exclude_slash_tmp",

138| `notice.model_migrations` | `map<string,string>` | Track acknowledged model migrations as old->new mappings. |138 type: "boolean",

139| `notify` | `array<string>` | Command invoked for notifications; receives a JSON payload from Codex. |139 description:

140| `oss_provider` | `lmstudio | ollama` | Default local provider used when running with `--oss` (defaults to prompting if unset). |140 "Exclude `/tmp` from writable roots in workspace-write mode.",

141| `otel.environment` | `string` | Environment tag applied to emitted OpenTelemetry events (default: `dev`). |141 },

142| `otel.exporter` | `none | otlp-http | otlp-grpc` | Select the OpenTelemetry exporter and provide any endpoint metadata. |142 {

143| `otel.exporter.<id>.endpoint` | `string` | Exporter endpoint for OTEL logs. |143 key: "windows.sandbox",

144| `otel.exporter.<id>.headers` | `map<string,string>` | Static headers included with OTEL exporter requests. |144 type: "unelevated | elevated",

145| `otel.exporter.<id>.protocol` | `binary | json` | Protocol used by the OTLP/HTTP exporter. |145 description:

146| `otel.exporter.<id>.tls.ca-certificate` | `string` | CA certificate path for OTEL exporter TLS. |146 "Windows-only native sandbox mode when running Codex natively on Windows.",

147| `otel.exporter.<id>.tls.client-certificate` | `string` | Client certificate path for OTEL exporter TLS. |147 },

148| `otel.exporter.<id>.tls.client-private-key` | `string` | Client private key path for OTEL exporter TLS. |148 {

149| `otel.log_user_prompt` | `boolean` | Opt in to exporting raw user prompts with OpenTelemetry logs. |149 key: "windows.sandbox_private_desktop",

150| `otel.metrics_exporter` | `none | statsig | otlp-http | otlp-grpc` | Select the OpenTelemetry metrics exporter (defaults to `statsig`). |150 type: "boolean",

151| `otel.trace_exporter` | `none | otlp-http | otlp-grpc` | Select the OpenTelemetry trace exporter and provide any endpoint metadata. |151 description:

152| `otel.trace_exporter.<id>.endpoint` | `string` | Trace exporter endpoint for OTEL logs. |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| `otel.trace_exporter.<id>.headers` | `map<string,string>` | Static headers included with OTEL trace exporter requests. |153 },

154| `otel.trace_exporter.<id>.protocol` | `binary | json` | Protocol used by the OTLP/HTTP trace exporter. |154 {

155| `otel.trace_exporter.<id>.tls.ca-certificate` | `string` | CA certificate path for OTEL trace exporter TLS. |155 key: "notify",

156| `otel.trace_exporter.<id>.tls.client-certificate` | `string` | Client certificate path for OTEL trace exporter TLS. |156 type: "array<string>",

157| `otel.trace_exporter.<id>.tls.client-private-key` | `string` | Client private key path for OTEL trace exporter TLS. |157 description:

158| `permissions.network.admin_url` | `string` | Admin endpoint for the managed network proxy. |158 "Command invoked for notifications; receives a JSON payload from Codex.",

159| `permissions.network.allow_local_binding` | `boolean` | Permit local bind/listen operations through the managed proxy. |159 },

160| `permissions.network.allow_unix_sockets` | `array<string>` | Allowlist of Unix socket paths permitted through the managed proxy. |160 {

161| `permissions.network.allow_upstream_proxy` | `boolean` | Allow the managed proxy to chain to another upstream proxy. |161 key: "check_for_update_on_startup",

162| `permissions.network.allowed_domains` | `array<string>` | Allowlist of domains permitted through the managed proxy. |162 type: "boolean",

163| `permissions.network.dangerously_allow_all_unix_sockets` | `boolean` | Allow the proxy to use arbitrary Unix sockets instead of the default restricted set. |163 description:

164| `permissions.network.dangerously_allow_non_loopback_admin` | `boolean` | Permit non-loopback bind addresses for the managed proxy admin listener. |164 "Check for Codex updates on startup (set to false only when updates are centrally managed).",

165| `permissions.network.dangerously_allow_non_loopback_proxy` | `boolean` | Permit non-loopback bind addresses for the managed proxy listener. |165 },

166| `permissions.network.denied_domains` | `array<string>` | Denylist of domains blocked by the managed proxy. |166 {

167| `permissions.network.enable_socks5` | `boolean` | Expose a SOCKS5 listener from the managed network proxy. |167 key: "feedback.enabled",

168| `permissions.network.enable_socks5_udp` | `boolean` | Allow UDP over the SOCKS5 listener when enabled. |168 type: "boolean",

169| `permissions.network.enabled` | `boolean` | Enable the managed network proxy configuration for subprocesses. |169 description:

170| `permissions.network.mode` | `limited | full` | Network proxy mode used for subprocess traffic. |170 "Enable feedback submission via `/feedback` across Codex surfaces (default: true).",

171| `permissions.network.proxy_url` | `string` | HTTP proxy endpoint used by the managed network proxy. |171 },

172| `permissions.network.socks_url` | `string` | SOCKS5 proxy endpoint used by the managed network proxy. |172 {

173| `personality` | `none | friendly | pragmatic` | Default communication style for models that advertise `supportsPersonality`; can be overridden per thread/turn or via `/personality`. |173 key: "analytics.enabled",

174| `plan_mode_reasoning_effort` | `none | minimal | low | medium | high | xhigh` | Plan-mode-specific reasoning override. When unset, Plan mode uses its built-in preset default. |174 type: "boolean",

175| `profile` | `string` | Default profile applied at startup (equivalent to `--profile`). |175 description:

176| `profiles.<name>.*` | `various` | Profile-scoped overrides for any of the supported configuration keys. |176 "Enable or disable analytics for this machine/profile. When unset, the client default applies.",

177| `profiles.<name>.analytics.enabled` | `boolean` | Profile-scoped analytics enablement override. |177 },

178| `profiles.<name>.experimental_use_unified_exec_tool` | `boolean` | Legacy name for enabling unified exec; prefer `[features].unified_exec`. |178 {

179| `profiles.<name>.model_catalog_json` | `string (path)` | Profile-scoped model catalog JSON path override (applied on startup only; overrides the top-level `model_catalog_json` for that profile). |179 key: "instructions",

180| `profiles.<name>.model_instructions_file` | `string (path)` | Profile-scoped replacement for the built-in instruction file. |180 type: "string",

181| `profiles.<name>.oss_provider` | `lmstudio | ollama` | Profile-scoped OSS provider for `--oss` sessions. |181 description:

182| `profiles.<name>.personality` | `none | friendly | pragmatic` | Profile-scoped communication style override for supported models. |182 "Reserved for future use; prefer `model_instructions_file` or `AGENTS.md`.",

183| `profiles.<name>.plan_mode_reasoning_effort` | `none | minimal | low | medium | high | xhigh` | Profile-scoped Plan-mode reasoning override. |183 },

184| `profiles.<name>.service_tier` | `flex | fast` | Profile-scoped service tier preference for new turns. |184 {

185| `profiles.<name>.tools_view_image` | `boolean` | Enable or disable the `view_image` tool in that profile. |185 key: "developer_instructions",

186| `profiles.<name>.web_search` | `disabled | cached | live` | Profile-scoped web search mode override (default: `"cached"`). |186 type: "string",

187| `profiles.<name>.windows.sandbox` | `unelevated | elevated` | Profile-scoped Windows sandbox mode override. |187 description:

188| `project_doc_fallback_filenames` | `array<string>` | Additional filenames to try when `AGENTS.md` is missing. |188 "Additional developer instructions injected into the session (optional).",

189| `project_doc_max_bytes` | `number` | Maximum bytes read from `AGENTS.md` when building project instructions. |189 },

190| `project_root_markers` | `array<string>` | List of project root marker filenames; used when searching parent directories for the project root. |190 {

191| `projects.<path>.trust_level` | `string` | Mark a project or worktree as trusted or untrusted (`"trusted"` | `"untrusted"`). Untrusted projects skip project-scoped `.codex/` layers. |191 key: "log_dir",

192| `review_model` | `string` | Optional model override used by `/review` (defaults to the current session model). |192 type: "string (path)",

193| `sandbox_mode` | `read-only | workspace-write | danger-full-access` | Sandbox policy for filesystem and network access during command execution. |193 description:

194| `sandbox_workspace_write.exclude_slash_tmp` | `boolean` | Exclude `/tmp` from writable roots in workspace-write mode. |194 "Directory where Codex writes log files (for example `codex-tui.log`); defaults to `$CODEX_HOME/log`.",

195| `sandbox_workspace_write.exclude_tmpdir_env_var` | `boolean` | Exclude `$TMPDIR` from writable roots in workspace-write mode. |195 },

196| `sandbox_workspace_write.network_access` | `boolean` | Allow outbound network access inside the workspace-write sandbox. |196 {

197| `sandbox_workspace_write.writable_roots` | `array<string>` | Additional writable roots when `sandbox_mode = "workspace-write"`. |197 key: "sqlite_home",

198| `service_tier` | `flex | fast` | Preferred service tier for new turns. `fast` is honored only when the `features.fast_mode` gate is enabled. |198 type: "string (path)",

199| `shell_environment_policy.exclude` | `array<string>` | Glob patterns for removing environment variables after the defaults. |199 description:

200| `shell_environment_policy.experimental_use_profile` | `boolean` | Use the user shell profile when spawning subprocesses. |200 "Directory where Codex stores the SQLite-backed state DB used by agent jobs and other resumable runtime state.",

201| `shell_environment_policy.ignore_default_excludes` | `boolean` | Keep variables containing KEY/SECRET/TOKEN before other filters run. |201 },

202| `shell_environment_policy.include_only` | `array<string>` | Whitelist of patterns; when set only matching variables are kept. |202 {

203| `shell_environment_policy.inherit` | `all | core | none` | Baseline environment inheritance when spawning subprocesses. |203 key: "compact_prompt",

204| `shell_environment_policy.set` | `map<string,string>` | Explicit environment overrides injected into every subprocess. |204 type: "string",

205| `show_raw_agent_reasoning` | `boolean` | Surface raw reasoning content when the active model emits it. |205 description: "Inline override for the history compaction prompt.",

206| `skills.config` | `array<object>` | Per-skill enablement overrides stored in config.toml. |206 },

207| `skills.config.<index>.enabled` | `boolean` | Enable or disable the referenced skill. |207 {

208| `skills.config.<index>.path` | `string (path)` | Path to a skill folder containing `SKILL.md`. |208 key: "commit_attribution",

209| `sqlite_home` | `string (path)` | Directory where Codex stores the SQLite-backed state DB used by agent jobs and other resumable runtime state. |209 type: "string",

210| `suppress_unstable_features_warning` | `boolean` | Suppress the warning that appears when under-development feature flags are enabled. |210 description:

211| `tool_output_token_limit` | `number` | Token budget for storing individual tool/function outputs in history. |211 'Commit co-author trailer used when `[features].codex_git_commit` is enabled. Defaults to `Codex <noreply@openai.com>`; set `""` to disable.',

212| `tools.view_image` | `boolean` | Enable the local-image attachment tool `view_image`. |212 },

213| `tools.web_search` | `boolean` | Deprecated legacy toggle for web search; prefer the top-level `web_search` setting. |213 {

214| `tui` | `table` | TUI-specific options such as enabling inline desktop notifications. |214 key: "model_instructions_file",

215| `tui.alternate_screen` | `auto | always | never` | Control alternate screen usage for the TUI (default: auto; auto skips it in Zellij to preserve scrollback). |215 type: "string (path)",

216| `tui.animations` | `boolean` | Enable terminal animations (welcome screen, shimmer, spinner) (default: true). |216 description:

217| `tui.model_availability_nux.<model>` | `integer` | Internal startup-tooltip state keyed by model slug. |217 "Replacement for built-in instructions instead of `AGENTS.md`.",

218| `tui.notification_method` | `auto | osc9 | bel` | Notification method for unfocused terminal notifications (default: auto). |218 },

219| `tui.notifications` | `boolean | array<string>` | Enable TUI notifications; optionally restrict to specific event types. |219 {

220| `tui.show_tooltips` | `boolean` | Show onboarding tooltips in the TUI welcome screen (default: true). |220 key: "personality",

221| `tui.status_line` | `array<string> | null` | Ordered list of TUI footer status-line item identifiers. `null` disables the status line. |221 type: "none | friendly | pragmatic",

222| `tui.theme` | `string` | Syntax-highlighting theme override (kebab-case theme name). |222 description:

223| `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. |223 "Default communication style for models that advertise `supportsPersonality`; can be overridden per thread/turn or via `/personality`.",

224| `windows_wsl_setup_acknowledged` | `boolean` | Track Windows onboarding acknowledgement (Windows only). |224 },

225| `windows.sandbox` | `unelevated | elevated` | Windows-only native sandbox mode when running Codex natively on Windows. |225 {

226 226 key: "service_tier",

227Key227 type: "flex | fast",

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

229`agents.<name>.config_file`229 },

230 230 {

231Type / Values231 key: "experimental_compact_prompt_file",

232 232 type: "string (path)",

233`string (path)`233 description:

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

235Details235 },

236 236 {

237Path to a TOML config layer for that role; relative paths resolve from the config file that declares the role.237 key: "skills.config",

238 238 type: "array<object>",

239Key239 description: "Per-skill enablement overrides stored in config.toml.",

240 240 },

241`agents.<name>.description`241 {

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

243Type / Values243 type: "string (path)",

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

245`string`245 },

246 246 {

247Details247 key: "skills.config.<index>.enabled",

248 248 type: "boolean",

249Role guidance shown to Codex when choosing and spawning that agent type.249 description: "Enable or disable the referenced skill.",

250 250 },

251Key251 {

252 252 key: "apps.<id>.enabled",

253`agents.<name>.nickname_candidates`253 type: "boolean",

254 254 description:

255Type / Values255 "Enable or disable a specific app/connector by id (default: true).",

256 256 },

257`array<string>`257 {

258 258 key: "apps._default.enabled",

259Details259 type: "boolean",

260 260 description:

261Optional pool of display nicknames for spawned agents in that role.261 "Default app enabled state for all apps unless overridden per app.",

262 262 },

263Key263 {

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

265`agents.job_max_runtime_seconds`265 type: "boolean",

266 266 description:

267Type / Values267 "Default allow/deny for app tools with `destructive_hint = true`.",

268 268 },

269`number`269 {

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

271Details271 type: "boolean",

272 272 description:

273Default per-worker timeout for `spawn_agents_on_csv` jobs. When unset, the tool falls back to 1800 seconds per worker.273 "Default allow/deny for app tools with `open_world_hint = true`.",

274 274 },

275Key275 {

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

277`agents.max_depth`277 type: "boolean",

278 278 description:

279Type / Values279 "Allow or block tools in this app that advertise `destructive_hint = true`.",

280 280 },

281`number`281 {

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

283Details283 type: "boolean",

284 284 description:

285Maximum nesting depth allowed for spawned agent threads (root sessions start at depth 0; default: 1).285 "Allow or block tools in this app that advertise `open_world_hint = true`.",

286 286 },

287Key287 {

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

289`agents.max_threads`289 type: "boolean",

290 290 description:

291Type / Values291 "Default enabled state for tools in this app unless a per-tool override exists.",

292 292 },

293`number`293 {

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

295Details295 type: "auto | prompt | approve",

296 296 description:

297Maximum number of agent threads that can be open concurrently. Defaults to `6` when unset.297 "Default approval behavior for tools in this app unless a per-tool override exists.",

298 298 },

299Key299 {

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

301`allow_login_shell`301 type: "boolean",

302 302 description:

303Type / Values303 "Per-tool enabled override for an app tool (for example `repos/list`).",

304 304 },

305`boolean`305 {

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

307Details307 type: "auto | prompt | approve",

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

309Allow 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.309 },

310 310 {

311Key311 key: "tool_suggest.discoverables",

312 312 type: "array<table>",

313`analytics.enabled`313 description:

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

315Type / Values315 },

316 316 {

317`boolean`317 key: "tool_suggest.disabled_tools",

318 318 type: "array<table>",

319Details319 description:

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

321Enable or disable analytics for this machine/profile. When unset, the client default applies.321 },

322 322 {

323Key323 key: "features.apps",

324 324 type: "boolean",

325`approval_policy`325 description: "Enable ChatGPT Apps/connectors support (experimental).",

326 326 },

327Type / Values327 {

328 328 key: "features.codex_hooks",

329`untrusted | on-request | never | { reject = { sandbox_approval = bool, rules = bool, mcp_elicitations = bool } }`329 type: "boolean",

330 330 description:

331Details331 "Enable lifecycle hooks loaded from `hooks.json` or inline `[hooks]` config.",

332 332 },

333Controls when Codex pauses for approval before executing commands. You can also use `approval_policy = { reject = { ... } }` to 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.333 {

334 334 key: "features.codex_git_commit",

335Key335 type: "boolean",

336 336 description:

337`approval_policy.reject.mcp_elicitations`337 "Enable Codex-generated git commits. When enabled, Codex uses `commit_attribution` to append a `Co-authored-by:` trailer to generated commit messages.",

338 338 },

339Type / Values339 {

340 340 key: "hooks",

341`boolean`341 type: "table",

342 342 description:

343Details343 "Lifecycle hooks configured inline in `config.toml`. Uses the same event schema as `hooks.json`; see the Hooks guide for examples and supported events.",

344 344 },

345When `true`, MCP elicitation prompts are auto-rejected instead of shown to the user.345 {

346 346 key: "features.memories",

347Key347 type: "boolean",

348 348 description: "Enable [Memories](https://developers.openai.com/codex/memories) (off by default).",

349`approval_policy.reject.rules`349 },

350 350 {

351Type / Values351 key: "mcp_servers.<id>.command",

352 352 type: "string",

353`boolean`353 description: "Launcher command for an MCP stdio server.",

354 354 },

355Details355 {

356 356 key: "mcp_servers.<id>.args",

357When `true`, approvals triggered by execpolicy `prompt` rules are auto-rejected.357 type: "array<string>",

358 358 description: "Arguments passed to the MCP stdio server command.",

359Key359 },

360 360 {

361`approval_policy.reject.sandbox_approval`361 key: "mcp_servers.<id>.env",

362 362 type: "map<string,string>",

363Type / Values363 description: "Environment variables forwarded to the MCP stdio server.",

364 364 },

365`boolean`365 {

366 366 key: "mcp_servers.<id>.env_vars",

367Details367 type: 'array<string | { name = string, source = "local" | "remote" }>',

368 368 description:

369When `true`, sandbox escalation approval prompts are auto-rejected.369 '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.',

370 370 },

371Key371 {

372 372 key: "mcp_servers.<id>.cwd",

373`apps._default.destructive_enabled`373 type: "string",

374 374 description: "Working directory for the MCP stdio server process.",

375Type / Values375 },

376 376 {

377`boolean`377 key: "mcp_servers.<id>.url",

378 378 type: "string",

379Details379 description: "Endpoint for an MCP streamable HTTP server.",

380 380 },

381Default allow/deny for app tools with `destructive_hint = true`.381 {

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

383Key383 type: "string",

384 384 description:

385`apps._default.enabled`385 "Environment variable sourcing the bearer token for an MCP HTTP server.",

386 386 },

387Type / Values387 {

388 388 key: "mcp_servers.<id>.http_headers",

389`boolean`389 type: "map<string,string>",

390 390 description: "Static HTTP headers included with each MCP HTTP request.",

391Details391 },

392 392 {

393Default app enabled state for all apps unless overridden per app.393 key: "mcp_servers.<id>.env_http_headers",

394 394 type: "map<string,string>",

395Key395 description:

396 396 "HTTP headers populated from environment variables for an MCP HTTP server.",

397`apps._default.open_world_enabled`397 },

398 398 {

399Type / Values399 key: "mcp_servers.<id>.enabled",

400 400 type: "boolean",

401`boolean`401 description: "Disable an MCP server without removing its configuration.",

402 402 },

403Details403 {

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

405Default allow/deny for app tools with `open_world_hint = true`.405 type: "boolean",

406 406 description:

407Key407 "When true, fail startup/resume if this enabled MCP server cannot initialize.",

408 408 },

409`apps.<id>.default_tools_approval_mode`409 {

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

411Type / Values411 type: "number",

412 412 description:

413`auto | prompt | approve`413 "Override the default 10s startup timeout for an MCP server.",

414 414 },

415Details415 {

416 416 key: "mcp_servers.<id>.startup_timeout_ms",

417Default approval behavior for tools in this app unless a per-tool override exists.417 type: "number",

418 418 description: "Alias for `startup_timeout_sec` in milliseconds.",

419Key419 },

420 420 {

421`apps.<id>.default_tools_enabled`421 key: "mcp_servers.<id>.tool_timeout_sec",

422 422 type: "number",

423Type / Values423 description:

424 424 "Override the default 60s per-tool timeout for an MCP server.",

425`boolean`425 },

426 426 {

427Details427 key: "mcp_servers.<id>.enabled_tools",

428 428 type: "array<string>",

429Default enabled state for tools in this app unless a per-tool override exists.429 description: "Allow list of tool names exposed by the MCP server.",

430 430 },

431Key431 {

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

433`apps.<id>.destructive_enabled`433 type: "array<string>",

434 434 description:

435Type / Values435 "Deny list applied after `enabled_tools` for the MCP server.",

436 436 },

437`boolean`437 {

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

439Details439 type: "array<string>",

440 440 description:

441Allow or block tools in this app that advertise `destructive_hint = true`.441 "OAuth scopes to request when authenticating to that MCP server.",

442 442 },

443Key443 {

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

445`apps.<id>.enabled`445 type: "string",

446 446 description:

447Type / Values447 "Optional RFC 8707 OAuth resource parameter to include during MCP login.",

448 448 },

449`boolean`449 {

450 450 key: "mcp_servers.<id>.experimental_environment",

451Details451 type: "local | remote",

452 452 description:

453Enable or disable a specific app/connector by id (default: true).453 "Experimental placement for an MCP server. `remote` starts stdio servers through a remote executor environment; streamable HTTP remote placement is not implemented.",

454 454 },

455Key455 {

456 456 key: "agents.max_threads",

457`apps.<id>.open_world_enabled`457 type: "number",

458 458 description:

459Type / Values459 "Maximum number of agent threads that can be open concurrently. Defaults to `6` when unset.",

460 460 },

461`boolean`461 {

462 462 key: "agents.max_depth",

463Details463 type: "number",

464 464 description:

465Allow or block tools in this app that advertise `open_world_hint = true`.465 "Maximum nesting depth allowed for spawned agent threads (root sessions start at depth 0; default: 1).",

466 466 },

467Key467 {

468 468 key: "agents.job_max_runtime_seconds",

469`apps.<id>.tools.<tool>.approval_mode`469 type: "number",

470 470 description:

471Type / Values471 "Default per-worker timeout for `spawn_agents_on_csv` jobs. When unset, the tool falls back to 1800 seconds per worker.",

472 472 },

473`auto | prompt | approve`473 {

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

475Details475 type: "string",

476 476 description:

477Per-tool approval behavior override for a single app tool.477 "Role guidance shown to Codex when choosing and spawning that agent type.",

478 478 },

479Key479 {

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

481`apps.<id>.tools.<tool>.enabled`481 type: "string (path)",

482 482 description:

483Type / Values483 "Path to a TOML config layer for that role; relative paths resolve from the config file that declares the role.",

484 484 },

485`boolean`485 {

486 486 key: "agents.<name>.nickname_candidates",

487Details487 type: "array<string>",

488 488 description:

489Per-tool enabled override for an app tool (for example `repos/list`).489 "Optional pool of display nicknames for spawned agents in that role.",

490 490 },

491Key491 {

492 492 key: "memories.generate_memories",

493`background_terminal_max_timeout`493 type: "boolean",

494 494 description:

495Type / Values495 "When `false`, newly created threads are not stored as memory-generation inputs. Defaults to `true`.",

496 496 },

497`number`497 {

498 498 key: "memories.use_memories",

499Details499 type: "boolean",

500 500 description:

501Maximum poll window in milliseconds for empty `write_stdin` polls (background terminal polling). Default: `300000` (5 minutes). Replaces the older `background_terminal_timeout` key.501 "When `false`, Codex skips injecting existing memories into future sessions. Defaults to `true`.",

502 502 },

503Key503 {

504 504 key: "memories.disable_on_external_context",

505`chatgpt_base_url`505 type: "boolean",

506 506 description:

507Type / Values507 "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`.",

508 508 },

509`string`509 {

510 510 key: "memories.max_raw_memories_for_consolidation",

511Details511 type: "number",

512 512 description:

513Override the base URL used during the ChatGPT login flow.513 "Maximum recent raw memories retained for global consolidation. Defaults to `256` and is capped at `4096`.",

514 514 },

515Key515 {

516 516 key: "memories.max_unused_days",

517`check_for_update_on_startup`517 type: "number",

518 518 description:

519Type / Values519 "Maximum days since a memory was last used before it becomes ineligible for consolidation. Defaults to `30` and is clamped to `0`-`365`.",

520 520 },

521`boolean`521 {

522 522 key: "memories.max_rollout_age_days",

523Details523 type: "number",

524 524 description:

525Check for Codex updates on startup (set to false only when updates are centrally managed).525 "Maximum age of threads considered for memory generation. Defaults to `30` and is clamped to `0`-`90`.",

526 526 },

527Key527 {

528 528 key: "memories.max_rollouts_per_startup",

529`cli_auth_credentials_store`529 type: "number",

530 530 description:

531Type / Values531 "Maximum rollout candidates processed per startup pass. Defaults to `16` and is capped at `128`.",

532 532 },

533`file | keyring | auto`533 {

534 534 key: "memories.min_rollout_idle_hours",

535Details535 type: "number",

536 536 description:

537Control where the CLI stores cached credentials (file-based auth.json vs OS keychain).537 "Minimum idle time before a thread is considered for memory generation. Defaults to `6` and is clamped to `1`-`48`.",

538 538 },

539Key539 {

540 540 key: "memories.min_rate_limit_remaining_percent",

541`commit_attribution`541 type: "number",

542 542 description:

543Type / Values543 "Minimum remaining percentage required in Codex rate-limit windows before memory generation starts. Defaults to `25` and is clamped to `0`-`100`.",

544 544 },

545`string`545 {

546 546 key: "memories.extract_model",

547Details547 type: "string",

548 548 description: "Optional model override for per-thread memory extraction.",

549Override the commit co-author trailer text. Set an empty string to disable automatic attribution.549 },

550 550 {

551Key551 key: "memories.consolidation_model",

552 552 type: "string",

553`compact_prompt`553 description: "Optional model override for global memory consolidation.",

554 554 },

555Type / Values555 {

556 556 key: "features.unified_exec",

557`string`557 type: "boolean",

558 558 description:

559Details559 "Use the unified PTY-backed exec tool (stable; enabled by default except on Windows).",

560 560 },

561Inline override for the history compaction prompt.561 {

562 562 key: "features.shell_snapshot",

563Key563 type: "boolean",

564 564 description:

565`developer_instructions`565 "Snapshot shell environment to speed up repeated commands (stable; on by default).",

566 566 },

567Type / Values567 {

568 568 key: "features.undo",

569`string`569 type: "boolean",

570 570 description: "Enable undo support (stable; off by default).",

571Details571 },

572 572 {

573Additional developer instructions injected into the session (optional).573 key: "features.multi_agent",

574 574 type: "boolean",

575Key575 description:

576 576 "Enable multi-agent collaboration tools (`spawn_agent`, `send_input`, `resume_agent`, `wait_agent`, and `close_agent`) (stable; on by default).",

577`disable_paste_burst`577 },

578 578 {

579Type / Values579 key: "features.personality",

580 580 type: "boolean",

581`boolean`581 description:

582 582 "Enable personality selection controls (stable; on by default).",

583Details583 },

584 584 {

585Disable burst-paste detection in the TUI.585 key: "features.web_search",

586 586 type: "boolean",

587Key587 description:

588 588 "Deprecated legacy toggle; prefer the top-level `web_search` setting.",

589`experimental_compact_prompt_file`589 },

590 590 {

591Type / Values591 key: "features.web_search_cached",

592 592 type: "boolean",

593`string (path)`593 description:

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

595Details595 },

596 596 {

597Load the compaction prompt override from a file (experimental).597 key: "features.web_search_request",

598 598 type: "boolean",

599Key599 description:

600 600 'Deprecated legacy toggle. When `web_search` is unset, true maps to `web_search = "live"`.',

601`experimental_use_unified_exec_tool`601 },

602 602 {

603Type / Values603 key: "features.shell_tool",

604 604 type: "boolean",

605`boolean`605 description:

606 606 "Enable the default `shell` tool for running commands (stable; on by default).",

607Details607 },

608 608 {

609Legacy name for enabling unified exec; prefer `[features].unified_exec` or `codex --enable unified_exec`.609 key: "features.enable_request_compression",

610 610 type: "boolean",

611Key611 description:

612 612 "Compress streaming request bodies with zstd when supported (stable; on by default).",

613`features.apps`613 },

614 614 {

615Type / Values615 key: "features.skill_mcp_dependency_install",

616 616 type: "boolean",

617`boolean`617 description:

618 618 "Allow prompting and installing missing MCP dependencies for skills (stable; on by default).",

619Details619 },

620 620 {

621Enable ChatGPT Apps/connectors support (experimental).621 key: "features.fast_mode",

622 622 type: "boolean",

623Key623 description:

624 624 'Enable Fast mode selection and the `service_tier = "fast"` path (stable; on by default).',

625`features.apps_mcp_gateway`625 },

626 626 {

627Type / Values627 key: "features.prevent_idle_sleep",

628 628 type: "boolean",

629`boolean`629 description:

630 630 "Prevent the machine from sleeping while a turn is actively running (experimental; off by default).",

631Details631 },

632 632 {

633Route Apps MCP calls through the OpenAI connectors MCP gateway (`https://api.openai.com/v1/connectors/mcp/`) instead of legacy routing (experimental).633 key: "suppress_unstable_features_warning",

634 634 type: "boolean",

635Key635 description:

636 636 "Suppress the warning that appears when under-development feature flags are enabled.",

637`features.artifact`637 },

638 638 {

639Type / Values639 key: "model_providers.<id>",

640 640 type: "table",

641`boolean`641 description:

642 642 "Custom provider definition. Built-in provider IDs (`openai`, `ollama`, and `lmstudio`) are reserved and cannot be overridden.",

643Details643 },

644 644 {

645Enable native artifact tools such as slides and spreadsheets (under development).645 key: "model_providers.<id>.name",

646 646 type: "string",

647Key647 description: "Display name for a custom model provider.",

648 648 },

649`features.child_agents_md`649 {

650 650 key: "model_providers.<id>.base_url",

651Type / Values651 type: "string",

652 652 description: "API base URL for the model provider.",

653`boolean`653 },

654 654 {

655Details655 key: "model_providers.<id>.env_key",

656 656 type: "string",

657Append AGENTS.md scope/precedence guidance even when no AGENTS.md is present (experimental).657 description: "Environment variable supplying the provider API key.",

658 658 },

659Key659 {

660 660 key: "model_providers.<id>.env_key_instructions",

661`features.collaboration_modes`661 type: "string",

662 662 description: "Optional setup guidance for the provider API key.",

663Type / Values663 },

664 664 {

665`boolean`665 key: "model_providers.<id>.experimental_bearer_token",

666 666 type: "string",

667Details667 description:

668 668 "Direct bearer token for the provider (discouraged; use `env_key`).",

669Legacy toggle for collaboration modes. Plan and default modes are available in current builds without setting this key.669 },

670 670 {

671Key671 key: "model_providers.<id>.requires_openai_auth",

672 672 type: "boolean",

673`features.default_mode_request_user_input`673 description:

674 674 "The provider uses OpenAI authentication (defaults to false).",

675Type / Values675 },

676 676 {

677`boolean`677 key: "model_providers.<id>.wire_api",

678 678 type: "responses",

679Details679 description:

680 680 "Protocol used by the provider. `responses` is the only supported value, and it is the default when omitted.",

681Allow `request_user_input` in default collaboration mode (under development; off by default).681 },

682 682 {

683Key683 key: "model_providers.<id>.query_params",

684 684 type: "map<string,string>",

685`features.elevated_windows_sandbox`685 description: "Extra query parameters appended to provider requests.",

686 686 },

687Type / Values687 {

688 688 key: "model_providers.<id>.http_headers",

689`boolean`689 type: "map<string,string>",

690 690 description: "Static HTTP headers added to provider requests.",

691Details691 },

692 692 {

693Legacy toggle for an earlier elevated Windows sandbox rollout. Current builds do not use it.693 key: "model_providers.<id>.env_http_headers",

694 694 type: "map<string,string>",

695Key695 description:

696 696 "HTTP headers populated from environment variables when present.",

697`features.enable_request_compression`697 },

698 698 {

699Type / Values699 key: "model_providers.<id>.request_max_retries",

700 700 type: "number",

701`boolean`701 description:

702 702 "Retry count for HTTP requests to the provider (default: 4).",

703Details703 },

704 704 {

705Compress streaming request bodies with zstd when supported (stable; on by default).705 key: "model_providers.<id>.stream_max_retries",

706 706 type: "number",

707Key707 description: "Retry count for SSE streaming interruptions (default: 5).",

708 708 },

709`features.experimental_windows_sandbox`709 {

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

711Type / Values711 type: "number",

712 712 description:

713`boolean`713 "Idle timeout for SSE streams in milliseconds (default: 300000).",

714 714 },

715Details715 {

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

717Legacy toggle for an earlier Windows sandbox rollout. Current builds do not use it.717 type: "boolean",

718 718 description:

719Key719 "Whether that provider supports the Responses API WebSocket transport.",

720 720 },

721`features.fast_mode`721 {

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

723Type / Values723 type: "table",

724 724 description:

725`boolean`725 "Command-backed bearer token configuration for a custom provider. Do not combine with `env_key`, `experimental_bearer_token`, or `requires_openai_auth`.",

726 726 },

727Details727 {

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

729Enable Fast mode selection and the `service_tier = "fast"` path (stable; on by default).729 type: "string",

730 730 description:

731Key731 "Command to run when Codex needs a bearer token. The command must print the token to stdout.",

732 732 },

733`features.image_detail_original`733 {

734 734 key: "model_providers.<id>.auth.args",

735Type / Values735 type: "array<string>",

736 736 description: "Arguments passed to the token command.",

737`boolean`737 },

738 738 {

739Details739 key: "model_providers.<id>.auth.timeout_ms",

740 740 type: "number",

741Allow image outputs with `detail = "original"` on supported models (under development).741 description:

742 742 "Maximum token command runtime in milliseconds (default: 5000).",

743Key743 },

744 744 {

745`features.image_generation`745 key: "model_providers.<id>.auth.refresh_interval_ms",

746 746 type: "number",

747Type / Values747 description:

748 748 "How often Codex proactively refreshes the token in milliseconds (default: 300000). Set to `0` to refresh only after an authentication retry.",

749`boolean`749 },

750 750 {

751Details751 key: "model_providers.<id>.auth.cwd",

752 752 type: "string (path)",

753Enable the built-in image generation tool (under development).753 description: "Working directory for the token command.",

754 754 },

755Key755 {

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

757`features.multi_agent`757 type: "string",

758 758 description:

759Type / Values759 "AWS profile name used by the built-in `amazon-bedrock` provider.",

760 760 },

761`boolean`761 {

762 762 key: "model_providers.amazon-bedrock.aws.region",

763Details763 type: "string",

764 764 description: "AWS region used by the built-in `amazon-bedrock` provider.",

765Enable multi-agent collaboration tools (`spawn_agent`, `send_input`, `resume_agent`, `wait`, `close_agent`, and `spawn_agents_on_csv`) (experimental; off by default).765 },

766 766 {

767Key767 key: "model_reasoning_effort",

768 768 type: "minimal | low | medium | high | xhigh",

769`features.personality`769 description:

770 770 "Adjust reasoning effort for supported models (Responses API only; `xhigh` is model-dependent).",

771Type / Values771 },

772 772 {

773`boolean`773 key: "plan_mode_reasoning_effort",

774 774 type: "none | minimal | low | medium | high | xhigh",