Unclear It is not clear what the normalizing step changes about the allowlist entries.
What
strictKnownMarketplaces is a setting that limits which plugin marketplaces people can add and install from. Claude Code now passes its value through a normalizing step before using it, both from managed settings and from seat settings. Before, the value was used exactly as given.
Separately, the "Connection to the API was lost" error now starts with a different shared prefix.
Why
The marketplace allowlist may now be read slightly differently, for example with entries tidied into one form.
Names in the bundlestrictKnownMarketplaces
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 strictKnownMarketplaces, on Plugin loading reference.
* **Marketplace sources restricted**: a [`strictKnownMarketplaces`](/docs/en/settings-reference#strictknownmarketplaces) allowlist without a `{ "source": "skills-dir" }` entry, or a [`blockedMarketplaces`](/docs/en/settings-reference#block…plugins/loading see the edit
Added since
A small documentation edit on Deploy managed settings touched a line naming strictKnownMarketplaces after this was published.
Wherever the session runs, claude.ai applies the admin console's [`strictKnownMarketplaces`](/docs/en/settings-reference#strictknownmarketplaces) and [`blockedMarketplaces`](/docs/en/settings-reference#blockedmarketplaces) lists itself whe…managed-settings see the edit
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear what the normalizing step changes about the allowlist entries.
Anthropic's documentation agrees
A small documentation edit on Deploy managed settings touched a line naming strictKnownMarketplaces after this was published.