skills-guide changedbuild-with-claude/skills-guide
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19491949## Managing custom Skills
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19511951<Warning id="workspace-scoped-access">
1952 **Custom Skills are accessible to your entire workspace, not scoped to an end user, conversation, or session.** Any API key with access to a workspace can read, use, and delete every custom Skill uploaded to that workspace. Every service account, and every user whose organization role allows API access, can use the Default Workspace in addition to any workspace you add them to, so keep Skills that must stay separate in their own workspace and access them only with [keys scoped to that workspace](https://platform.claude.com/docs/en/manage-claude/workspaces#api-keys-and-resource-scoping).
1952 **Custom Skills are accessible to your entire workspace, not scoped to an end user, conversation, or session.** Any API key with access to a workspace can read, use, and delete every custom Skill uploaded to that workspace. Every service account, and every user whose organization role allows API access, can use the Default Workspace in addition to any workspace you add them to. For that reason, keep Skills that must stay separate in their own workspace and access them only with [keys scoped to that workspace](https://platform.claude.com/docs/en/manage-claude/workspaces#api-keys-and-resource-scoping).
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19541954 If you are building a multitenant platform on the Skills API, create a separate [workspace](https://platform.claude.com/docs/en/manage-claude/workspaces) for each tenant. The workspace is the isolation boundary for custom Skills, so a workspace for each tenant gives that tenant's Skills hard isolation from every other tenant. Each organization can have up to 100 workspaces by default (see [How workspaces work](https://platform.claude.com/docs/en/manage-claude/workspaces#how-workspaces-work)); if you need more for tenant isolation, contact your account team.
19551955</Warning>
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