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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.232

macOS background low-memory check uses a built-in memory pressure API

Under the hood
Useful1 Signal1
Background Agents

macOS memory-pressure checks use a built-in API and log warnings instead of throwing.

What

On macOS, the check that retires background work under memory pressure no longer loads a system library to call sysctlbyname; it uses Bun's memory pressure API and retires at critical pressure. Failures now log a warning rather than throwing.

Details
  • Normal, warning and critical pressure map to levels 1, 2 and 4.
  • Other platforms are unchanged: free memory is compared against a threshold that defaults to 1024 MB when no server value is set.
Evidence

bg low-mem: memoryPressureLevel failed:

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.232 →