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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 v2.1.221

/plugin reload checks prompt-cache impact

You'll notice
Useful3 Signal0
Plugins

Activating plugins from the /plugin dialog now warns you before it invalidates your conversation's prompt cache.

/plugin/reload-plugins
What

Activating plugins from the plugin management dialog now goes through the same prompt-cache check that /reload-plugins uses, so an install does not silently invalidate the conversation's prompt cache.

Details
  • The dialog is passed getReloadCacheImpactOptions, carrying the model plus dynamic MCP config.
  • An install-triggered activation can now bail out with a cache_impact outcome.
  • The equivalent /reload-plugins warning text already existed.
Evidence

getReloadCacheImpactOptions

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 v2.1.221 →