extraKnownMarketplaces
A Claude Code settings key, read out of the shipped bundle. It was in the build from v2.1.138 and was gone by v2.1.284.
Register marketplaces for a repository or an organization
Anthropic's own wording. Read off All settings, captured 2026-10-22.
In the changelogs
24Releases whose published page names extraKnownMarketplaces.
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v2.1.295
Removing a marketplace from the plugin errors view now asks you to confirm
Removing a marketplace or ignored-name entries from the plugin errors tab now needs a yes/no confirmation instead of happening at once
found in this entry's text
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v2.1.295
Plugin settings summary now includes a separate seat layer
The summary of plugin and marketplace settings now includes a seat section with its own plugin and marketplace values
found in this entry's text, named in this entry
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v2.1.295
New check on plugin settings loaded from machine-level files
Claude Code now checks plugin-related settings that come from settings files users cannot write to
found in this entry's text
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v2.1.292
Refused marketplace names now come with steps to rename them
When a marketplace from a settings file is refused for an Anthropic-like name, the message now explains how to rename it
found in this entry's text
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v2.1.287
The /plugin menu can turn the built-in marketplace on or off
The plugin marketplace manager lists a built-in marketplace with Turn on and Turn off actions, and explains when policy hides every plugin
found in this entry's text
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v2.1.287
Adding a marketplace can be refused when it clashes with one in your settings
A marketplace add can now be refused if its name or clone folder matches one in
extraKnownMarketplaceswith a different sourcefound in this entry's text, named in this entry
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v2.1.287
Marketplace source mismatch errors now name
extraKnownMarketplacesA marketplace whose source does not match its settings entry now gets an error naming
extraKnownMarketplaces, and theenvcheck is rewordedfound in this entry's text, named in this entry
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v2.1.286
Marketplace trust errors now point to
extraKnownMarketplacesWhen a plugin marketplace fails a trust check, the suggested fix now names the
extraKnownMarketplacessettingfound in this entry's text, named in this entry
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v2.1.284
Managed-rules lockdown keeps plugin tool permissions only from admin-backed sources
Under
allowManagedPermissionRulesOnly, only plugins from admin-backed sources keep their allowed-tools grants; other plugins' grants are ignoredfound in this entry's text
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v2.1.282
Warning for official-looking marketplace names exists but cannot trigger yet
A warning for marketplace entries whose names look official exists in the code but cannot trigger in this build
found in this entry's text, named in this entry
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v2.1.277
Clearer error message when a plugin can't load because its marketplace isn't registered
Plugins that fail to load from an unregistered marketplace now get a specific explanatory error
found in this entry's text
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v2.1.251
Marketplace location mismatch now tells you how to fix it
A misplaced marketplace now tells you to re-add it or declare it under extraKnownMarketplaces.
named in this entry, found in this entry's text
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v2.1.248
Two new settings keys named: WSL settings inheritance and managed-source behaviour
Two settings keys are named for WSL inheriting Windows settings and managed-source behaviour.
found in this entry's text
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v2.1.239
Cloud sessions can be handed forwarded plugin settings
Cloud sessions can accept a pushed plugin configuration, but it stays off without server values.
found in this entry's text
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v2.1.238
Trust dialog now discloses header-minting and marketplace commands a folder declares
The folder-trust prompt now lists commands a repo would run to mint HTTP headers.
found in this entry's text
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v2.1.238
Managed settings can refuse plugin sources and marketplace updates
Admins can block plugins and marketplaces from unlisted sources, with refusals naming the policy.
named in this entry, found in this entry's text
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v2.1.232
additionalMarketplacessettings aliasadditionalMarketplacesnow works as an alias forextraKnownMarketplacesin settings files.named in this entry, found in this entry's text
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v2.1.232
Two new spellings for the marketplace settings keys
You can now write
additionalMarketplacesandallowedMarketplacesas aliases for the older marketplace settings keys.named in this entry, found in this entry's text
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v2.1.228
extraKnownMarketplaces merges instead of being replaced
extraKnownMarketplaces now merges across settings files instead of one layer wiping the others.
named in this entry, found in this entry's text
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v2.1.224
Invalid
extraKnownMarketplacesentries are dropped with a warningBad marketplace entries in your settings are now removed and reported as warnings instead of silently accepted.
named in this entry, found in this entry's text
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v2.1.223
Marketplace policy lists accept an owner wildcard
You can block or allow every repo under one owner with a single
owner/*marketplace entry.named in this entry, found in this entry's text
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v2.1.222
Resume snapshots carry user settings without plugin keys
Resumed sessions now carry your settings files along, with plugin registrations stripped out.
named in this entry, found in this entry's text
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v2.1.80
Inline Marketplace Definitions in Settings
found in this entry's text
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v2.0.28
Enhanced Marketplace Removal Cleanup
found in this entry's text
First cited
6The earliest release whose published evidence quoted extraKnownMarketplaces was v2.1.228, 11 Aug 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
Presence across releases
2Build by build
149One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.