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Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.275 ·

Plugins can now be installed and updated directly from the npm registry

← All of v2.1.275 Home All releases

Claude Code plugins can now come from npm packages, not just git or the marketplace, behind a gate

TierNothing to try yethow much it should matter to you
Useful5my rating, 1 to 5
Signal4worth watching, 1 to 5
AreaPluginswhat it touches
KindIn Developmentin v2.1.275,
Group of 6 Nothing to try yet Notable

Claude Code plugins can now come from npm packages, not just git or the marketplace, behind a gate

What

  • Plugin installs and updates can now use an npm registry as the source, alongside the existing git and claude.ai sources. Install records track npmVersionSpec, npmResolved, npmIntegrity, and npmRegistry, and installation refuses to proceed if the package's integrity can't be verified.
  • Plugin identifiers can now reference npm-scoped packages, such as @scope/name, and @scope/name@npm is understood as that package sourced from npm.
  • claude plugin install recognizes an @npm-suffixed spec (name@npm, @scope/name@npm, [email protected]@npm) and a new --registry option to install straight from a given npm registry URL, bypassing the marketplace system entirely.
  • A deep link (claude://install-plugin) can now install a plugin directly, taking a plugin name and an optional marketplace, which can also point at an npm source.
  • This whole capability is gated behind an account flag and a feature gate (tengu_plugins_npm_marketplace).

Why

This lets teams distribute and install plugins as ordinary npm packages instead of requiring a git-based marketplace, while still verifying the downloaded package's integrity before trusting it.

Read from
Names in the bundle--registry/plugin install
Feature flag
tengu_plugins_npm_marketplace Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.275: off

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.275. It isn't a statement about your account. What a flag value here can and cannot tell you

What the documentation says
Documented inmcp/registry/about
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Confirmed since Anthropic's documentation has since written up /plugin install, on Error reference. You confirmed adding a marketplace through [`/plugin install <plugin> --marketplace <source>`](/docs/en/discover-plugins#add-a-marketplace-and-install-in-one-command), and the catalog Claude Code fetched from that source names itself the s… errors see the edit
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up /plugin install, on Error reference.
Anthropic's release notes agreeAdded /plugin install <plugin> --marketplace <source>, which offers to add the marketplace before installing the plugin
The name it cites is new in this buildNew in this build: --registry

See this entry in the whole of v2.1.275 →