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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.274 ·

More bash reserved/protected variable names added

More bash variable and config key names are now protected from being overwritten

TierYou'll noticehow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaBash Safetywhat it touches
KindImprovementsin v2.1.274,
You'll notice

More bash variable and config key names are now protected from being overwritten

What

The list of protected bash shell variable and configuration names grew to include:

  • BASH_MONOSECONDS
  • BASH_TRAPSIG
  • BASH_SOURCE_PATH
  • bash_cmds
  • bash_aliases
  • execignore
  • bash_source_path
Why

Protecting these names prevents Claude Code, or commands it runs, from accidentally overwriting bash internals or configuration keys that could break shell behavior.

See this entry in the whole of v2.1.274 →

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