MR: Pending ## Description In https://gitlab.com/gitlab-org/gitlab/-/issues/426512 we implemented limits on workspaces imposed at a per-agent level. By enforcing these limits, we put the user in a position to encounter errors during the creation of their workspace. If the total number of workspaces currently running on an agent has reached the quota, or I have reached my per_user quota, I can't create a workspace on that agent. It's important to note that I may have access to multiple agents, so we can't resolve this by preventing access to the `New workspace` view entirely. ### Current experience Validation doesn't occur until after the user tries to create a workspace, at which point we display an error. ### Proposal A Hide or otherwise prevent agents that can't accept new workspace from the current user from the dropdown in the UI. ### Proposal B Allow a user to select any properly configured agent, but perform the validation before the form has been submitted. Disable the button and display a clear error message that indicates why the user can't create one at this point. ## Acceptance Criteria - [ ] TBD ## Design Requirements ## Impact Assessment TODO: Fill out or delete \[Please describe the impact this feature/enhancement will have on the user experience and/or the product as a whole.\] ## User Story TODO: Fill out or delete \[Provide a user story to illustrate the use case for this feature/enhancement. Include examples to help communicate the intended functionality.\]