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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.280 ·

Background job environment entries are now individually logged when dropped

Claude Code now logs a separate warning for each background job environment variable it drops

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What

When Claude Code runs a background job, it checks the environment variables being passed to it and drops any that fail validation. A new function now logs a separate warning for each dropped variable, naming the variable and the specific reason it was dropped:

  • the variable name is invalid
  • the variable's value is not a string
  • the variable's value contains a NUL character
Why

Previously a dropped environment variable would not be called out individually. Logging each one by name and reason makes it easier to spot why a background job is missing an environment variable it was supposed to have.

See this entry in the whole of v2.1.280 →

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