Extend Claude with skills changedskills
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Upstream edited this page at 1 Oct 2026 00:55 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 1 Oct 2026 01:07 UTC.
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687687* **Working directory**: Claude Code runs each command in the session shell's current working directory. That directory moves when Claude runs `cd`. Use [`${CLAUDE_SKILL_DIR}` or `${CLAUDE_PROJECT_DIR}`](#available-string-substitutions) in paths that must resolve the same way every time.
688688* **stderr**: with the default `bash` shell, Claude Code merges stderr into stdout. Anything the command writes to stderr appears in the injected text.
689* **Timeout**: each command runs under the Bash tool's default 2-minute [timeout](/docs/en/tools-reference#timeout-and-output-limits). When the Bash tool [moves a timed-out command to the background](/docs/en/tools-reference#background-commands), the skill still renders. The injected text reports the move and names the background task and the file collecting the command's output. When the command is one the Bash tool never auto-backgrounds, Claude Code kills it at the timeout. That failure [aborts the invocation](#when-an-injected-command-fails).
689* **Timeout**: each command runs under the Bash tool's default 2-minute [timeout](/docs/en/tools-reference#timeout-and-output-limits). When the Bash tool [moves a timed-out command to the background](/docs/en/tools-reference#foreground-commands-that-move-to-the-background), the skill still renders. The injected text reports the move and names the background task and the file collecting the command's output. When the command is one the Bash tool never auto-backgrounds, Claude Code kills it at the timeout. That failure [aborts the invocation](#when-an-injected-command-fails).
690690* **Output size**: output past the Bash tool's inline ceiling arrives as a file path plus a short preview, not truncated text. [Output limits](/docs/en/tools-reference#output-limits) covers the ceiling and how to adjust each boundary.
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692692The PowerShell tool applies the same timeout, backgrounding, and output-ceiling behavior to the commands it runs. See the [PowerShell tool](/docs/en/tools-reference#powershell-tool) section for its specifics.
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