Marketplace reference changedplugins/marketplace-reference
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Upstream edited this page at 10 Oct 2026 16:33 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 10 Oct 2026 16:37 UTC.
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4343* <span id="reserved-name-spellings" />**Another spelling of a reserved name**: a name that differs from a reserved name only by a trailing dot, or by a symbol other than an underscore in place of a hyphen, so `claude.code.plugins` counts as `claude-code-plugins`. Adding the marketplace fails with [`is another spelling of "<reserved>", a reserved marketplace name`](/docs/en/errors#marketplace-name-is-another-spelling-of-a-reserved-name), and a marketplace already registered under one stops loading. This check requires Claude Code v2.1.280 or later.
4444* **Names Claude Code uses for plugins that don't come from a marketplace**: `inline` for plugins loaded with [`--plugin-dir`](/docs/en/cli-reference), `builtin` for built-in plugins, `skills-dir` for plugins auto-loaded from [`.claude/skills/`](/docs/en/skills), and `synced` for plugins synced from your claude.ai account. `claude-plugin-test` is also reserved. `skills-dir` also appears as `{"source": "skills-dir"}` in `strictKnownMarketplaces` and `blockedMarketplaces`, described under [Source values valid only in policy lists](#source-values-valid-only-in-policy-lists).
4545* **`npm`, `pip`, `uv`, `cargo`, `github`, and `gh`**: reserved in any casing. This check requires Claude Code v2.1.275 or later.
46* **Member names that every JavaScript object has**: `constructor`, `hasOwnProperty`, `isPrototypeOf`, `propertyIsEnumerable`, `toLocaleString`, `toString`, and `valueOf`. `claude plugin marketplace add` refuses a marketplace that uses one with [`Claude Code reserves this name and cannot register a marketplace under it`](/docs/en/plugins/troubleshooting#claude-code-reserves-this-name). This check requires Claude Code v2.1.296 or later.
4647* **Names starting with `claudeai-`**: reserved for marketplaces hosted on claude.ai. `claude plugin marketplace add` refuses any other marketplace that uses one with `Cannot add marketplace "<name>": names starting with "claudeai-" are reserved for marketplaces hosted on claude.ai`.
4748* **The download folder of a registered GitHub marketplace, `<owner>-<repo>`**: Claude Code downloads a marketplace added from a `github` source such as `acme/x-tools` through a folder named `acme-x-tools`, whatever that marketplace's own `name` is. While that marketplace is registered under a name other than `acme-x-tools`, `claude plugin marketplace add` refuses a different marketplace named `acme-x-tools` after downloading it, and reports `Can't use the marketplace name "acme-x-tools"`. This check requires Claude Code v2.1.290 or later.
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