Give every teammate the right level of access so more people can collaborate safely without slowing delivery.
Every teammate in Hamster has a role that controls what they can do. Hamster Studio uses four roles: Reviewer, Creator, Admin, and Owner.
This gives teams a practical middle ground: you can let more people contribute and review work without giving full admin-level permissions to everyone.
There is also a special designation called primary owner, which applies to the person who originally created the team. The primary owner has extra protections that cannot be overridden by other roles.

Reviewers can see everything in the workspace — briefs, blueprints, skills, methods, plans, tasks, and conversations — without being able to edit any of it. They can comment on briefs, participate in conversation threads, and vote on alignment, so they stay involved without changing the work itself.
Reviewer seats are free, making it easy to include stakeholders, leadership, clients, or partners in the same shared context without risking accidental changes.
Creators can build and edit all workspace content — briefs, blueprints, skills, methods, plans, and tasks — but do not have team-administration privileges.
This role is ideal for teammates who should ship work but should not manage membership, billing, or team settings.
Admins can manage day-to-day team operations without full primary ownership controls. An admin can:
Admins cannot delete the team, manage billing, or take over primary ownership.
Owners have full access to the team workspace and its settings. An owner can:
Owners cannot change the role or remove the primary owner.
The hierarchy determines which actions are permitted between roles. The list below is ordered from most limited access to highest access:
| Role | Access Level | Summary |
|---|---|---|
| Reviewer | Read-only | View everything, comment on briefs, vote on alignment |
| Creator | Standard | All of Reviewer, plus create and edit workspace content |
| Admin | Elevated | All of Creator, plus manage members, roles, and settings |
| Owner | Full | All of Admin, plus billing, ownership transfer, and team deletion |
When someone performs a role-sensitive action (such as changing a teammate's role), they can only assign roles at or below their allowed level.
| Capability | Reviewer | Creator | Admin | Owner |
|---|---|---|---|---|
| View all workspace content and activity | * | * | * | * |
| Comment on briefs, threads, and alignment votes | * | * | * | * |
| Create and edit workspace content (briefs, blueprints, skills, methods, plans, tasks) | * | * | * | |
| Organize work into initiatives | * | * | * | |
| Set up integrations (GitHub, Linear, Slack, etc.) | * | * | * | |
| Invite and remove members | * | * | ||
| Assign and update roles | * | * | ||
| Manage team settings | * | * | ||
| Manage billing and subscriptions | * | |||
| Transfer ownership | * | |||
| Delete the team | * |
Owner, Admin, and Creator roles each use one paid seat. Reviewer seats are free and unlimited — add as many stakeholders, clients, or partners as you need without affecting your plan.
The primary owner is the member who created the team. This designation cannot be transferred through normal role management — it requires an explicit ownership transfer, which includes an additional verification step.
Key differences for the primary owner:
To change a member's role:
The change takes effect immediately. The affected member does not need to do anything.
Transferring primary ownership moves full control of the team from you to another owner. This is a permanent action that requires verification:
After the transfer, you remain in the team as an owner (not the primary owner). You can still manage the workspace, but you can no longer delete the team or perform other primary-owner-only actions.
Owners and admins can remove members whose role is at a lower hierarchy level than their own. To remove a member:
Removed members lose access to the workspace immediately. Their past contributions (briefs, comments, and similar) remain in the workspace.
Any role except the primary owner can leave a team at any time. To leave:
LEAVE to confirm.The primary owner cannot leave the team. They must transfer ownership first.