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28622862#### How `env` values interact with your shell
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28642864* A value here overwrites the same variable exported in your shell, and when more than one settings file sets a variable, the [highest-precedence](/docs/en/settings#settings-precedence) one applies. [Variables Claude Code ignores in `env`](#variables-claude-code-ignores-in-env) lists the exceptions for project and local settings.
2865* When the Claude Desktop app or a [self-hosted environment](/docs/en/self-hosted-environments) runner starts the session, the launch environment it builds takes precedence instead: Claude Code ignores an `env` value from any settings file for a variable the launch environment already sets. The [debug log](/docs/en/debug-your-config) names each ignored variable.
28652866* To cancel a shell export, set the variable to `""`. Claude Code treats an empty value as unset for provider selection, and subprocesses inherit the empty value.
28662867* `NO_COLOR` and `FORCE_COLOR` set here reach only subprocesses. To change Claude Code's own interface colors, set them in your shell before launching `claude`.
28672868* Values here are plain text in the settings file and reach every subprocess Claude Code starts. For an OTLP bearer token that rotates, use [`otelHeadersHelper`](#otelheadershelper); for API credentials, use [`apiKeyHelper`](#apikeyhelper).
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41724173### `disableSkillShellExecution`
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4174Turn off inline shell execution for `` !`...` `` and ` ```! ` blocks in [skills](/en/skills) and custom commands from user, project, plugin, or additional-directory sources. Claude Code replaces each command with `[shell command execution disabled by policy]` instead of running it.
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4176* **Scope**: [`Any file`](#scopes). A `true` in managed settings can't be overridden by `false` elsewhere.
4177* **Type**: Boolean
4178 * `true`: Claude Code replaces each inline shell command with `[shell command execution disabled
4175Turn off inline shell execution for `` !`...` `` and ` ```! ` blocks in [skills](/en/skills) and custom commands from user, project, plugin, or
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