config-sample.md Codex Docs, 2026-02-19 20:53 UTC → 2026-03-07 00:33 UTC

1# Sample Configuration1# Sample Configuration

2 2 

3Use this example configuration as a starting point. It includes most keys Codex reads from `config.toml`, along with defaults and short notes.3Use this example configuration as a starting point. It includes most keys Codex reads from `config.toml`, along with default behaviors, recommended values where helpful, and short notes.

4 4 

5For explanations and guidance, see:5For explanations and guidance, see:

6 6 

7- [Config basics](https://developers.openai.com/codex/config-basic)7- [Config basics](https://developers.openai.com/codex/config-basic)

8- [Advanced Config](https://developers.openai.com/codex/config-advanced)8- [Advanced Config](https://developers.openai.com/codex/config-advanced)

9- [Config Reference](https://developers.openai.com/codex/config-reference)9- [Config Reference](https://developers.openai.com/codex/config-reference)

10- [Sandbox and approvals](https://developers.openai.com/codex/agent-approvals-security#sandbox-and-approvals)

11- [Managed configuration](https://developers.openai.com/codex/enterprise/managed-configuration)

10 12 

11Use the snippet below as a reference. Copy only the keys and sections you need into `~/.codex/config.toml` (or into a project-scoped `.codex/config.toml`), then adjust values for your setup.13Use the snippet below as a reference. Copy only the keys and sections you need into `~/.codex/config.toml` (or into a project-scoped `.codex/config.toml`), then adjust values for your setup.

12 14 

13```toml15```toml

14# Codex example configuration (config.toml)16# Codex example configuration (config.toml)

15#17#

16# This file lists all keys Codex reads from config.toml, their default values,18# This file lists all keys Codex reads from config.toml, along with default

17# and concise explanations. Values here mirror the effective defaults compiled19# behaviors, recommended examples, and concise explanations. Adjust as needed.

18# into the CLI. Adjust as needed.

19#20#

20# Notes21# Notes

21# - Root keys must appear before tables in TOML.22# - Root keys must appear before tables in TOML.

26# Core Model Selection27# Core Model Selection

27################################################################################28################################################################################

28 29 

29# Primary model used by Codex. Default: "gpt-5.2-codex" on all platforms.30# Primary model used by Codex. Recommended example for most users: "gpt-5.4".

30model = "gpt-5.2-codex"31model = "gpt-5.4"

31 32 

32# Default communication style for supported models. Default: "friendly".33# Default communication style for supported models. Default: "friendly".

33# Allowed values: none | friendly | pragmatic34# Allowed values: none | friendly | pragmatic

34# personality = "friendly"35# personality = "friendly"

35 36 

36# Optional model override for /review. Default: unset (uses current session model).37# Optional model override for /review. Default: unset (uses current session model).

37# review_model = "gpt-5.2-codex"38# review_model = "gpt-5.4"

38 39 

39# Provider id selected from [model_providers]. Default: "openai".40# Provider id selected from [model_providers]. Default: "openai".

40model_provider = "openai"41model_provider = "openai"

46# Uncomment to force values.47# Uncomment to force values.

47# model_context_window = 128000 # tokens; default: auto for model48# model_context_window = 128000 # tokens; default: auto for model

48# model_auto_compact_token_limit = 0 # tokens; unset uses model defaults49# model_auto_compact_token_limit = 0 # tokens; unset uses model defaults

49# tool_output_token_limit = 10000 # tokens stored per tool output; default: 10000 for gpt-5.2-codex50# tool_output_token_limit = 10000 # tokens stored per tool output

51# model_catalog_json = "/absolute/path/to/models.json" # optional startup-only model catalog override

52# background_terminal_max_timeout = 300000 # ms; max empty write_stdin poll window (default 5m)

50# log_dir = "/absolute/path/to/codex-logs" # directory for Codex logs; default: "$CODEX_HOME/log"53# log_dir = "/absolute/path/to/codex-logs" # directory for Codex logs; default: "$CODEX_HOME/log"

54# sqlite_home = "/absolute/path/to/codex-state" # optional SQLite-backed runtime state directory

51 55 

52################################################################################56################################################################################

53# Reasoning & Verbosity (Responses API capable models)57# Reasoning & Verbosity (Responses API capable models)

54################################################################################58################################################################################

55 59 

56# Reasoning effort: minimal | low | medium | high | xhigh (default: medium; xhigh on gpt-5.2-codex and gpt-5.2)60# Reasoning effort: minimal | low | medium | high | xhigh (default: medium; `xhigh` availability is model-dependent)

57model_reasoning_effort = "medium"61model_reasoning_effort = "medium"

58 62 

59# Reasoning summary: auto | concise | detailed | none (default: auto)63# Reasoning summary: auto | concise | detailed | none (default: auto)

105# - untrusted: only known-safe read-only commands auto-run; others prompt109# - untrusted: only known-safe read-only commands auto-run; others prompt

106# - on-request: model decides when to ask (default)110# - on-request: model decides when to ask (default)

107# - never: never prompt (risky)111# - never: never prompt (risky)

112# - { reject = { ... } }: auto-reject selected prompt categories

108approval_policy = "on-request"113approval_policy = "on-request"

114# Example granular auto-reject policy:

115# approval_policy = { reject = { sandbox_approval = true, rules = false, mcp_elicitations = false } }

116 

117# Allow login-shell semantics for shell-based tools when they request `login = true`.

118# Default: true. Set false to force non-login shells and reject explicit login-shell requests.

119allow_login_shell = true

109 120 

110# Filesystem/network sandbox policy for tool calls:121# Filesystem/network sandbox policy for tool calls:

111# - read-only (default)122# - read-only (default)

113# - danger-full-access (no sandbox; extremely risky)124# - danger-full-access (no sandbox; extremely risky)

114sandbox_mode = "read-only"125sandbox_mode = "read-only"

115 126 

127[windows]

128# Native Windows sandbox mode (Windows only): unelevated | elevated

129sandbox = "unelevated"

130 

116################################################################################131################################################################################

117# Authentication & Login132# Authentication & Login

118################################################################################133################################################################################

136# Optional fixed port for MCP OAuth callback: 1-65535. Default: unset.151# Optional fixed port for MCP OAuth callback: 1-65535. Default: unset.

137# mcp_oauth_callback_port = 4321152# mcp_oauth_callback_port = 4321

138 153 

154# Optional redirect URI override for MCP OAuth login (for example, remote devbox ingress).

155# Custom callback paths are supported. `mcp_oauth_callback_port` still controls the listener port.

156# mcp_oauth_callback_url = "https://devbox.example.internal/callback"

157 

139################################################################################158################################################################################

140# Project Documentation Controls159# Project Documentation Controls

141################################################################################160################################################################################

192# Active profile name. When unset, no profile is applied.211# Active profile name. When unset, no profile is applied.

193# profile = "default"212# profile = "default"

194 213 

214################################################################################

215# Agents (multi-agent roles and limits)

216################################################################################

217 

218# [agents]

219# Maximum concurrently open agent threads. Default: 6

220# max_threads = 6

221# Maximum nested spawn depth. Root session starts at depth 0. Default: 1

222# max_depth = 1

223# Default timeout per worker for spawn_agents_on_csv jobs. When unset, the tool defaults to 1800 seconds.

224# job_max_runtime_seconds = 1800

225 

226# [agents.reviewer]

227# description = "Find security, correctness, and test risks in code."

228# config_file = "./agents/reviewer.toml" # relative to the config.toml that defines it

229 

195################################################################################230################################################################################

196# Skills (per-skill overrides)231# Skills (per-skill overrides)

197################################################################################232################################################################################

198 233 

199# Disable or re-enable a specific skill without deleting it.234# Disable or re-enable a specific skill without deleting it.

200[[skills.config]]235[[skills.config]]

201# path = "/path/to/skill"236# path = "/path/to/skill/SKILL.md"

202# enabled = false237# enabled = false

203 238 

204################################################################################239################################################################################

274# Control alternate screen usage (auto skips it in Zellij to preserve scrollback).309# Control alternate screen usage (auto skips it in Zellij to preserve scrollback).

275# alternate_screen = "auto"310# alternate_screen = "auto"

276 311 

277# Ordered list of footer status-line item IDs. Default: null (disabled).312# Ordered list of footer status-line item IDs. When unset, Codex uses:

313# ["model-with-reasoning", "context-remaining", "current-dir"].

314# Set to [] to hide the footer.

278# status_line = ["model", "context-remaining", "git-branch"]315# status_line = ["model", "context-remaining", "git-branch"]

279 316 

317# Syntax-highlighting theme (kebab-case). Use /theme in the TUI to preview and save.

318# You can also add custom .tmTheme files under $CODEX_HOME/themes.

319# theme = "catppuccin-mocha"

320 

280# Control whether users can submit feedback from `/feedback`. Default: true321# Control whether users can submit feedback from `/feedback`. Default: true

281[feedback]322[feedback]

282enabled = true323enabled = true

299 340 

300[features]341[features]

301# Leave this table empty to accept defaults. Set explicit booleans to opt in/out.342# Leave this table empty to accept defaults. Set explicit booleans to opt in/out.

302shell_tool = true343# shell_tool = true

303# apps = false344# apps = false

304# apps_mcp_gateway = false345# apps_mcp_gateway = false

305# Deprecated legacy toggles; prefer the top-level `web_search` setting.

306# web_search = false

307# web_search_cached = false346# web_search_cached = false

308# web_search_request = false347# web_search_request = false

309unified_exec = false348# unified_exec = false

310shell_snapshot = false349# shell_snapshot = false

311apply_patch_freeform = false350# apply_patch_freeform = false

351# multi_agent = false

312# search_tool = false352# search_tool = false

313# personality = true353# personality = true

314request_rule = true354# request_rule = true

315collaboration_modes = true355# collaboration_modes = true

316use_linux_sandbox_bwrap = false356# use_linux_sandbox_bwrap = false

317experimental_windows_sandbox = false357# remote_models = false

318elevated_windows_sandbox = false358# runtime_metrics = false

319remote_models = false359# powershell_utf8 = true

320runtime_metrics = false360# child_agents_md = false

321powershell_utf8 = true

322child_agents_md = false

323 361 

324################################################################################362################################################################################

325# Define MCP servers under this table. Leave empty to disable.363# Define MCP servers under this table. Leave empty to disable.

399[profiles]437[profiles]

400 438 

401# [profiles.default]439# [profiles.default]

402# model = "gpt-5.2-codex"440# model = "gpt-5.4"

403# model_provider = "openai"441# model_provider = "openai"

404# approval_policy = "on-request"442# approval_policy = "on-request"

405# sandbox_mode = "read-only"443# sandbox_mode = "read-only"

409# model_verbosity = "medium"447# model_verbosity = "medium"

410# personality = "friendly" # or "pragmatic" or "none"448# personality = "friendly" # or "pragmatic" or "none"

411# chatgpt_base_url = "https://chatgpt.com/backend-api/"449# chatgpt_base_url = "https://chatgpt.com/backend-api/"

450# model_catalog_json = "./models.json"

412# experimental_compact_prompt_file = "./compact_prompt.txt"451# experimental_compact_prompt_file = "./compact_prompt.txt"

413# include_apply_patch_tool = false452# include_apply_patch_tool = false

414# experimental_use_unified_exec_tool = false453# experimental_use_unified_exec_tool = false

422 461 

423# Optional per-app controls.462# Optional per-app controls.

424[apps]463[apps]

464# [_default] applies to all apps unless overridden per app.

465# [apps._default]

466# enabled = true

467# destructive_enabled = true

468# open_world_enabled = true

469#

425# [apps.google_drive]470# [apps.google_drive]

426# enabled = false471# enabled = false

427# disabled_reason = "user" # or "unknown"472# destructive_enabled = false # block destructive-hint tools for this app

473# default_tools_enabled = true

474# default_tools_approval_mode = "prompt" # auto | prompt | approve

475#

476# [apps.google_drive.tools."files/delete"]

477# enabled = false

478# approval_mode = "approve"

428 479 

429################################################################################480################################################################################

430# Projects (trust levels)481# Projects (trust levels)

475# client-certificate = "/etc/codex/certs/client.pem"526# client-certificate = "/etc/codex/certs/client.pem"

476# client-private-key = "/etc/codex/certs/client-key.pem"527# client-private-key = "/etc/codex/certs/client-key.pem"

477```528```

529 

530################################################################################

531 

532# Windows

533 

534################################################################################

535 

536[windows]

537 

538# Native Windows sandbox mode (Windows only). The example below uses the

539 

540# recommended elevated mode.

541 

542sandbox = “elevated”