config-basic.md Codex Docs, 2026-04-24 12:28 UTC → 2026-04-24 18:20 UTC

1# Config basics1# Config basics

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3Codex reads configuration details from more than one location. Your personal defaults live in `~/.codex/config.toml`, and you can add project overrides with `.codex/config.toml` files. For security, Codex loads project config files only when you trust the project.3Codex reads configuration details from more than one location. Your personal defaults live in `~/.codex/config.toml`, and you can add project overrides with `.codex/config.toml` files. For security, Codex loads project `.codex/` layers only when you trust the project.

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5## Codex configuration file5## Codex configuration file

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28Use that precedence to set shared defaults at the top level and keep profiles focused on the values that differ.28Use that precedence to set shared defaults at the top level and keep profiles focused on the values that differ.

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30If you mark a project as untrusted, Codex skips project-scoped `.codex/` layers (including `.codex/config.toml`) and falls back to user, system, and built-in defaults.30If you mark a project as untrusted, Codex skips project-scoped `.codex/` layers, including project-local config, hooks, and rules. User and system config still load, including user/global hooks and rules.

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32For one-off overrides via `-c`/`--config` (including TOML quoting rules), see [Advanced Config](https://developers.openai.com/codex/config-advanced#one-off-overrides-from-the-cli).32For one-off overrides via `-c`/`--config` (including TOML quoting rules), see [Advanced Config](https://developers.openai.com/codex/config-advanced#one-off-overrides-from-the-cli).

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