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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 v2.1.199

  • Config write queue now correctly drains before process exit, relaunch, and exitWithMessage paths — previously a race could lose in-flight settings writes on shutdown. (search for "write queue drain timeout")
  • The settings write path now uses a proper async queue with in-order serialization (_f) for all config sections, preventing concurrent writes from clobbering each other. (search for "saveConfigWithLock", "mbn.set")
  • deleteCurrentProjectConfigFields and deleteProjectConfig fallback paths now correctly re-base on the enqueue-time cache snapshot when a concurrent auth write is in flight, preventing auth loss. (search for "enqueue-time cache snapshot. See GH #3117")
  • Model alias picker no longer inserts duplicate entries when the current alias and its 1M variant are both in the list. (search for "Failed to migrate", model alias migration error strings)

See this entry in the whole of v2.1.199 →