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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.265 ·

shellToolCommand: bash executions now default to inserting a 'cc-shell' background-task join marker

Bash commands now default to a 'shell' execution class that inserts a background-task join marker

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Internal ChangesKind: in v2.1.265,
Internal ChangesSection of the release

Unclear What the cc-shell join marker is used for downstream, and whether it's visible to users, isn't shown by the finding.

What

Bash command execution now defaults its internal cgroup class (a grouping used to manage resource limits) to "shell". Whenever that class is "shell", a new shellToolCommand setting kicks in and causes the command builder to prepend a small marker command, referred to as a cc-shell join marker, before running the actual command.

Why

This appears to be internal plumbing for tracking or synchronizing background shell tasks; the finding doesn't specify what user-visible behavior depends on this marker.

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Names in the bundlecc-shell
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat the cc-shell join marker is used for downstream, and whether it's visible to users, isn't shown by the finding.

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