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HomeDocsClaude Code CLI 30 Sep 2026
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Nearest release: v2.1.286, published under an hour before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 30 Sep 2026 17:31 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 30 Sep 2026 17:37 UTC.

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312312* On macOS and Linux, Claude Code stops your running background tasks when the operating system reports critical memory pressure, provided the session has been idle for at least 30 minutes and no turn or subagent is running. Requires Claude Code v2.1.193 or later
313313 * The [debug log](/docs/en/debug-your-config) says why tasks were stopped, or why a pressure event left them running
314314 * Set [`CLAUDE_CODE_DISABLE_BG_SHELL_PRESSURE_REAP`](/docs/en/env-vars) to `1` to turn off memory-pressure stops
315* Background commands owned by a [subagent](/docs/en/sub-agents) have no time limit, except that a command owned by a subagent running in the foreground ends when that subagent gives its final response; see [Background commands](/docs/en/tools-reference#background-commands) in the tools reference. Before v2.1.218, neither the memory-pressure reap nor the former 60-minute limit on subagent commands covered commands moved to the background with `Ctrl+B`
315* Background Bash and PowerShell commands have a time limit, counted from the moment the command enters the background: 30 minutes, or the `timeout` Claude asks for when it starts a command in the background, up to a maximum of 2 hours. A command that moves to the background while it runs, for example with `Ctrl+B`, gets 30 minutes from the move. When a command reaches its limit, Claude Code stops it and tells Claude why, and Claude can start it again with a longer `timeout` if the work still needs it. Two environment variables raise the limits, in milliseconds, and neither can shorten them:
316 * Set [`BASH_DEFAULT_TIMEOUT_MS`](/docs/en/env-vars) above `1800000` to replace the 30-minute default with that value, for moved commands as well
317 * Set [`BASH_MAX_TIMEOUT_MS`](/docs/en/env-vars) above `7200000` to raise the 2-hour maximum. Setting `BASH_DEFAULT_TIMEOUT_MS` above `7200000` raises it the same way
318* A background command that a foreground [subagent](/docs/en/sub-agents#run-subagents-in-foreground-or-background) started ends when that subagent's run ends, whether it finished, failed, or was interrupted; see [Background commands](/docs/en/tools-reference#background-commands) in the tools reference
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317320To disable all background task functionality, set the `CLAUDE_CODE_DISABLE_BACKGROUND_TASKS` environment variable to `1`. See [Environment variables](/docs/en/env-vars) for details.
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