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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.

All of v2.1.228 Home All releases olderv2.1.227 v2.1.229newer
Claude Code v2.1.228

Headless plugin install refreshes the plugin cache in the background

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Useful4 Signal3
Plugins Notable not in their notes

Headless plugin installs refresh the cache in the background; set CLAUDE_CODE_SYNC_PLUGIN_INSTALL to skip it.

CLAUDE_CODE_SYNC_PLUGIN_INSTALL
What

Installing plugins in headless mode now re-fills the plugin cache after each change instead of leaving it stale, without blocking the install. Set CLAUDE_CODE_SYNC_PLUGIN_INSTALL to skip the background work entirely; it is also skipped when a cache-only load is already pinned.

Details
  • The re-fill is tracked so a later pass can tell whether the current cache came from its own refresh.
  • A failed refresh logs a tagged message rather than rejecting and failing the install.
Evidence

headlessPluginInstall: plugins changed

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 v2.1.228 →