Sample Configuration

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# Codex example configuration (config.toml)
#
# This file lists the main keys Codex reads from config.toml, along with default
# behaviors, recommended examples, and concise explanations. Adjust as needed.
#
# Notes
# - Root keys must appear before tables in TOML.
# - Optional keys that default to "unset" are shown commented out with notes.
# - MCP servers, profile files, and model providers are examples; remove or edit.

################################################################################

# Core Model Selection

################################################################################

# Primary model used by Codex. Recommended example for most users: "gpt-5.5".

model = "gpt-5.5"

# Communication style for supported models. Allowed values: none | friendly | pragmatic

# personality = "pragmatic"

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

# review_model = "gpt-5.5"

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

model_provider = "openai"

# Default OSS provider for --oss sessions. When unset, Codex prompts. Default: unset.

# oss_provider = "ollama"

# Preferred service tier. Built-in examples: fast | flex; model catalogs can add more.

# service_tier = "flex"

# Optional manual model metadata. When unset, Codex uses model or preset defaults.

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

# model_auto_compact_token_limit = 64000 # tokens; unset uses model defaults

# tool_output_token_limit = 12000 # tokens stored per tool output

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

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

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

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

################################################################################

# Reasoning & Verbosity (Responses API capable models)

################################################################################

# Reasoning effort: minimal | low | medium | high | xhigh

# model_reasoning_effort = "medium"

# Optional override used when Codex runs in plan mode: none | minimal | low | medium | high | xhigh

# plan_mode_reasoning_effort = "high"

# Reasoning summary: auto | concise | detailed | none

# model_reasoning_summary = "auto"

# Text verbosity for GPT-5 family (Responses API): low | medium | high

# model_verbosity = "medium"

# Force enable or disable reasoning summaries for current model.

# model_supports_reasoning_summaries = true

################################################################################

# Instruction Overrides

################################################################################

# Additional user instructions are injected before AGENTS.md. Default: unset.

# developer_instructions = ""

# Inline override for the history compaction prompt. Default: unset.

# compact_prompt = ""

# Override the default commit co-author trailer. This only takes effect when

# [features].codex_git_commit is enabled. When enabled and unset, Codex uses

# "Codex <noreply@openai.com>". Set to "" to disable it.

# commit_attribution = "Jane Doe <jane@example.com>"

# Override built-in base instructions with a file path. Default: unset.

# model_instructions_file = "/absolute/or/relative/path/to/instructions.txt"

# Load the compact prompt override from a file. Default: unset.

# experimental_compact_prompt_file = "/absolute/or/relative/path/to/compact_prompt.txt"

################################################################################

# Notifications

################################################################################

# External notifier program (argv array). When unset: disabled.

# notify = ["notify-send", "Codex"]

################################################################################

# Approval & Sandbox

################################################################################

# When to ask for command approval:

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

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

# - never: never prompt (risky)

# - { granular = { ... } }: allow or auto-reject selected prompt categories

approval_policy = "on-request"

# Who reviews eligible approval prompts: user (default) | auto_review

# approvals_reviewer = "user"

# Example granular policy:

# approval_policy = { granular = {

# sandbox_approval = true,

# rules = true,

# mcp_elicitations = true,

# request_permissions = false,

# skill_approval = false

# } }

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

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

allow_login_shell = true

# Filesystem/network sandbox policy for tool calls:

# - read-only (default)

# - workspace-write

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

sandbox_mode = "read-only"

# Named permissions profile to apply by default. Built-ins:

# :read-only | :workspace | :danger-full-access

# Use a custom name such as "workspace" only when you also define [permissions.workspace].

# default_permissions = ":workspace"

################################################################################

# Authentication & Login

################################################################################

# Where to persist CLI login credentials: file (default) | keyring | auto

cli_auth_credentials_store = "file"

# Base URL for ChatGPT auth flow (not OpenAI API).

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

# Optional base URL override for the built-in OpenAI provider.

# openai_base_url = "https://us.api.openai.com/v1"

# Restrict ChatGPT login to a specific workspace id. Default: unset.

# forced_chatgpt_workspace_id = "00000000-0000-0000-0000-000000000000"

# Force login mechanism when Codex would normally auto-select. Default: unset.

# Allowed values: chatgpt | api

# forced_login_method = "chatgpt"

# Preferred store for MCP OAuth credentials: auto (default) | file | keyring

mcp_oauth_credentials_store = "auto"

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

# mcp_oauth_callback_port = 4321

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

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

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

################################################################################

# Project Documentation Controls

################################################################################

# Max bytes from AGENTS.md to embed into first-turn instructions. Default: 32768

project_doc_max_bytes = 32768

# Ordered fallbacks when AGENTS.md is missing at a directory level. Default: []

project_doc_fallback_filenames = []

# Project root marker filenames used when searching parent directories. Default: [".git"]

# project_root_markers = [".git"]

################################################################################

# History & File Opener

################################################################################

# URI scheme for clickable citations: vscode (default) | vscode-insiders | windsurf | cursor | none

file_opener = "vscode"

################################################################################

# UI, Notifications, and Misc

################################################################################

# Suppress internal reasoning events from output. Default: false

hide_agent_reasoning = false

# Show raw reasoning content when available. Default: false

show_raw_agent_reasoning = false

# Disable burst-paste detection in the TUI. Default: false

disable_paste_burst = false

# Track Windows onboarding acknowledgement (Windows only). Default: false

windows_wsl_setup_acknowledged = false

# Check for updates on startup. Default: true

check_for_update_on_startup = true

################################################################################

# Web Search

################################################################################

# Web search mode: disabled | cached | live. Default: "cached"

# cached serves results from a web search cache (an OpenAI-maintained index).

# cached returns pre-indexed results; live fetches the most recent data.

# If you use --yolo or another full access sandbox setting, web search defaults to live.

web_search = "cached"

# Config profiles are separate files under CODEX_HOME.

# Example: ~/.codex/ci.config.toml, selected with codex --profile ci.

# Suppress the warning shown when under-development feature flags are enabled.

# suppress_unstable_features_warning = true

################################################################################

# Agents (multi-agent roles and limits)

################################################################################

[agents]

# Maximum concurrently open agent threads. Default: 6

# max_threads = 6

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

# max_depth = 1

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

# job_max_runtime_seconds = 1800

# [agents.reviewer]

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

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

# nickname_candidates = ["Athena", "Ada"]

################################################################################

# Skills (per-skill overrides)

################################################################################

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

[[skills.config]]

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

# enabled = false

################################################################################

# Sandbox settings (tables)

################################################################################

# Extra settings used only when sandbox_mode = "workspace-write".

[sandbox_workspace_write]

# Additional writable roots beyond the workspace (cwd). Default: []

writable_roots = []

# Allow outbound network access inside the sandbox. Default: false

network_access = false

# Exclude $TMPDIR from writable roots. Default: false

exclude_tmpdir_env_var = false

# Exclude /tmp from writable roots. Default: false

exclude_slash_tmp = false

################################################################################

# Shell Environment Policy for spawned processes (table)

################################################################################

[shell_environment_policy]

# inherit: all (default) | core | none

inherit = "all"

# Skip default excludes for names containing KEY/SECRET/TOKEN (case-insensitive). Default: false

ignore_default_excludes = false

# Case-insensitive glob patterns to remove (e.g., "AWS**", "AZURE**"). Default: []

exclude = []

# Explicit key/value overrides (always win). Default: {}

set = {}

# Whitelist; if non-empty, keep only matching vars. Default: []

include_only = []

# Experimental: run via user shell profile. Default: false

experimental_use_profile = false

################################################################################

# Sandboxed networking settings

################################################################################

# Enable the feature before configuring sandboxed networking rules.

# [features.network_proxy]

# enabled = true

# domains = { "api.openai.com" = "allow", "example.com" = "deny" }

#

# Exact hosts match only themselves.

# "*.example.com" matches subdomains only; "**.example.com" matches the apex plus subdomains.

# "*" allows any public host that is not denied, so prefer scoped rules when possible.

# `allow_local_binding = false` blocks loopback and private destinations by default.

# Add an exact local IP literal or `localhost` allow rule for one target, or set it to true only when broader local access is required.

#

# Set `default_permissions = "workspace"` before enabling this profile.

# Example additional workspace roots that inherit this profile's

# `:workspace_roots` filesystem rules.

# [permissions.workspace.workspace_roots]

# "~/code/app" = true

# "~/code/shared-lib" = true

#

# Example filesystem profile. Use `"deny"` to deny reads for exact paths or

# glob patterns. On platforms that need pre-expanded glob matches, set

# glob_scan_max_depth when using unbounded patterns such as `**`.

# [permissions.workspace.filesystem]

# glob_scan_max_depth = 3

# ":workspace_roots" = { "." = "write", "**/*.env" = "deny" }

# "/absolute/path/to/secrets" = "deny"

#

# [permissions.workspace.network]

# enabled = true

# proxy_url = "http://127.0.0.1:43128"

# admin_url = "http://127.0.0.1:43129"

# enable_socks5 = false

# socks_url = "http://127.0.0.1:43130"

# enable_socks5_udp = false

# allow_upstream_proxy = false

# dangerously_allow_non_loopback_proxy = false

# dangerously_allow_non_loopback_admin = false

# dangerously_allow_all_unix_sockets = false

# mode = "limited" # limited | full

# allow_local_binding = false

#

# [permissions.workspace.network.domains]

# "api.openai.com" = "allow"

# "example.com" = "deny"

#

# [permissions.workspace.network.unix_sockets]

# "/var/run/docker.sock" = "allow"

################################################################################

# History (table)

################################################################################

[history]

# save-all (default) | none

persistence = "save-all"

# Maximum bytes for history file; oldest entries are trimmed when exceeded. Example: 5242880

# max_bytes = 5242880

################################################################################

# UI, Notifications, and Misc (tables)

################################################################################

[tui]

# Desktop notifications from the TUI: boolean or filtered list. Default: true

# Examples: false | ["agent-turn-complete", "approval-requested"]

notifications = false

# Notification mechanism for terminal alerts: auto | osc9 | bel. Default: "auto"

# notification_method = "auto"

# When notifications fire: unfocused (default) | always

# notification_condition = "unfocused"

# Enables welcome/status/spinner animations. Default: true

animations = true

# Show onboarding tooltips in the welcome screen. Default: true

show_tooltips = true

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

# alternate_screen = "auto"

# Ordered list of footer status-line item IDs. When unset, Codex uses:

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

# Set to [] to hide the footer.

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

# Ordered list of terminal window/tab title item IDs. When unset, Codex uses:

# ["spinner", "project"]. Set to [] to clear the title.

# Available IDs include app-name, project, spinner, status, thread, git-branch, model,

# and task-progress.

# terminal_title = ["spinner", "project"]

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

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

# theme = "catppuccin-mocha"

# Custom key bindings. Context-specific bindings override [tui.keymap.global].

# Use [] to unbind an action.

# [tui.keymap.global]

# open_transcript = "ctrl-t"

# open_external_editor = []

#

# [tui.keymap.composer]

# submit = ["enter", "ctrl-m"]

# Internal tooltip state keyed by model slug. Usually managed by Codex.

# [tui.model_availability_nux]

# "gpt-5.4" = 1

# Enable or disable analytics for this machine. When unset, Codex uses its default behavior.

[analytics]
enabled = true

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

[feedback]
enabled = true

# In-product notices (mostly set automatically by Codex).

[notice]

# hide_full_access_warning = true

# hide_world_writable_warning = true

# hide_rate_limit_model_nudge = true

# hide_gpt5_1_migration_prompt = true

# "hide_gpt-5.1-codex-max_migration_prompt" = true

# model_migrations = { "gpt-5.3-codex" = "gpt-5.4" }

################################################################################

# Centralized Feature Flags (preferred)

################################################################################

[features]

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

# shell_tool = true

# apps = false

# hooks = false

# codex_git_commit = false

# unified_exec = true

# shell_snapshot = true

# multi_agent = true

# personality = true

# network_proxy = false

# fast_mode = true

# enable_request_compression = true

# skill_mcp_dependency_install = true

# prevent_idle_sleep = false

################################################################################

# Memories (table)

################################################################################

# Enable memories with [features].memories, then tune memory behavior here.

# [memories]

# generate_memories = true

# use_memories = true

# disable_on_external_context = false # legacy alias: no_memories_if_mcp_or_web_search

################################################################################

# Lifecycle hooks can be configured here inline or in a sibling hooks.json.

################################################################################

# [hooks]

# [[hooks.PreToolUse]]

# matcher = "^Bash$"

#

# [[hooks.PreToolUse.hooks]]

# type = "command"

# command = 'python3 "/absolute/path/to/pre_tool_use_policy.py"'

# timeout = 30

# statusMessage = "Checking Bash command"

################################################################################

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

################################################################################

[mcp_servers]

# --- Example: STDIO transport ---

# [mcp_servers.docs]

# enabled = true # optional; default true

# required = true # optional; fail startup/resume if this server cannot initialize

# command = "docs-server" # required

# args = ["--port", "4000"] # optional

# env = { "API_KEY" = "value" } # optional key/value pairs copied as-is

# env_vars = ["ANOTHER_SECRET"] # optional: forward local parent env vars

# env_vars = ["LOCAL_TOKEN", { name = "REMOTE_TOKEN", source = "remote" }]

# cwd = "/path/to/server" # optional working directory override

# experimental_environment = "remote" # experimental: run stdio via a remote executor

# startup_timeout_sec = 10.0 # optional; default 10.0 seconds

# # startup_timeout_ms = 10000 # optional alias for startup timeout (milliseconds)

# tool_timeout_sec = 60.0 # optional; default 60.0 seconds

# enabled_tools = ["search", "summarize"] # optional allow-list

# disabled_tools = ["slow-tool"] # optional deny-list (applied after allow-list)

# scopes = ["read:docs"] # optional OAuth scopes

# oauth_resource = "https://docs.example.com/" # optional OAuth resource

# --- Example: Streamable HTTP transport ---

# [mcp_servers.github]

# enabled = true # optional; default true

# required = true # optional; fail startup/resume if this server cannot initialize

# url = "https://github-mcp.example.com/mcp" # required

# bearer_token_env_var = "GITHUB_TOKEN" # optional; Authorization: Bearer <token>

# http_headers = { "X-Example" = "value" } # optional static headers

# env_http_headers = { "X-Auth" = "AUTH_ENV" } # optional headers populated from env vars

# startup_timeout_sec = 10.0 # optional

# tool_timeout_sec = 60.0 # optional

# enabled_tools = ["list_issues"] # optional allow-list

# disabled_tools = ["delete_issue"] # optional deny-list

# scopes = ["repo"] # optional OAuth scopes

################################################################################

# Model Providers

################################################################################

# Built-ins include:

# - openai

# - ollama

# - lmstudio

# - amazon-bedrock

# These IDs are reserved. Use a different ID for custom providers.

[model_providers]

# --- Example: built-in Amazon Bedrock provider options ---

# model_provider = "amazon-bedrock"

# model = "<bedrock-model-id>"

# [model_providers.amazon-bedrock.aws]

# profile = "default"

# region = "eu-central-1"

# --- Example: OpenAI data residency with explicit base URL or headers ---

# [model_providers.openaidr]

# name = "OpenAI Data Residency"

# base_url = "https://us.api.openai.com/v1" # example with 'us' domain prefix

# wire_api = "responses" # only supported value

# # requires_openai_auth = true # use only for providers backed by OpenAI auth

# # request_max_retries = 4 # default 4; max 100

# # stream_max_retries = 5 # default 5; max 100

# # stream_idle_timeout_ms = 300000 # default 300_000 (5m)

# # supports_websockets = true # optional

# # experimental_bearer_token = "sk-example" # optional dev-only direct bearer token

# # http_headers = { "X-Example" = "value" }

# # env_http_headers = { "OpenAI-Organization" = "OPENAI_ORGANIZATION", "OpenAI-Project" = "OPENAI_PROJECT" }

# --- Example: Azure/OpenAI-compatible provider ---

# [model_providers.azure]

# name = "Azure"

# base_url = "https://YOUR_PROJECT_NAME.openai.azure.com/openai"

# wire_api = "responses"

# query_params = { api-version = "2025-04-01-preview" }

# env_key = "AZURE_OPENAI_API_KEY"

# env_key_instructions = "Set AZURE_OPENAI_API_KEY in your environment"

# # supports_websockets = false

# --- Example: command-backed bearer token auth ---

# [model_providers.proxy]

# name = "OpenAI using LLM proxy"

# base_url = "https://proxy.example.com/v1"

# wire_api = "responses"

#

# [model_providers.proxy.auth]

# command = "/usr/local/bin/fetch-codex-token"

# args = ["--audience", "codex"]

# timeout_ms = 5000

# refresh_interval_ms = 300000

# --- Example: Local OSS (e.g., Ollama-compatible) ---

# [model_providers.local_ollama]

# name = "Ollama"

# base_url = "http://localhost:11434/v1"

# wire_api = "responses"

################################################################################

# Apps / Connectors

################################################################################

# Optional per-app controls.

[apps]

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

# [apps._default]

# enabled = true

# destructive_enabled = true

# open_world_enabled = true

#

# [apps.google_drive]

# enabled = false

# destructive_enabled = false # block destructive-hint tools for this app

# default_tools_enabled = true

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

#

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

# enabled = false

# approval_mode = "approve"

# Optional tool suggestion allowlist for connectors or plugins Codex can offer to install.

# [tool_suggest]

# discoverables = [

# { type = "connector", id = "gmail" },

# { type = "plugin", id = "figma@openai-curated" },

# ]

# disabled_tools = [

# { type = "plugin", id = "slack@openai-curated" },

# { type = "connector", id = "connector_googlecalendar" },

# ]

################################################################################

# Config Profiles (separate files)

################################################################################

# To create a config profile, put overrides in a separate profile file under $CODEX_HOME.

# Select it with codex --profile ci.

# For example, a CI profile could live at $CODEX_HOME/ci.config.toml:

# model = "gpt-5.4"

# approval_policy = "on-request"

# sandbox_mode = "read-only"

# service_tier = "flex" # or another supported service tier id

# oss_provider = "ollama"

# model_reasoning_effort = "medium"

# plan_mode_reasoning_effort = "high"

# model_reasoning_summary = "auto"

# model_verbosity = "medium"

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

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

# model_catalog_json = "./models.json"

# model_instructions_file = "/absolute/or/relative/path/to/instructions.txt"

# experimental_compact_prompt_file = "./compact_prompt.txt"

# tools_view_image = true

# features = { unified_exec = false }

################################################################################

# Projects (trust levels)

################################################################################

[projects]

# Mark specific worktrees as trusted or untrusted.

# [projects."/absolute/path/to/project"]

# trust_level = "trusted" # or "untrusted"

################################################################################

# Tools

################################################################################

[tools]

# view_image = true

################################################################################

# OpenTelemetry (OTEL) - disabled by default

################################################################################

[otel]

# Include user prompt text in logs. Default: false

log_user_prompt = false

# Environment label applied to telemetry. Default: "dev"

environment = "dev"

# Exporter: none (default) | otlp-http | otlp-grpc

exporter = "none"

# Trace exporter: none (default) | otlp-http | otlp-grpc

trace_exporter = "none"

# Metrics exporter: none | statsig | otlp-http | otlp-grpc

metrics_exporter = "statsig"

# Example OTLP/HTTP exporter configuration

# [otel.exporter."otlp-http"]

# endpoint = "https://otel.example.com/v1/logs"

# protocol = "binary" # "binary" | "json"

# [otel.exporter."otlp-http".headers]

# "x-otlp-api-key" = "${OTLP_TOKEN}"

# [otel.exporter."otlp-http".tls]

# ca-certificate = "certs/otel-ca.pem"

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

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

# Example OTLP/gRPC trace exporter configuration

# [otel.trace_exporter."otlp-grpc"]

# endpoint = "https://otel.example.com:4317"

# headers = { "x-otlp-meta" = "abc123" }

################################################################################

# Windows

################################################################################

[windows]

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

sandbox = "unelevated"