People who can open the project, with their names (spec D119) — whom to @mention or assign.

Everyone who can open the project: its members (directly or through a team), the company's company admins, who open every project, and — when the project has company-wide access (D142) — every active seat of the company (via: company). Read-only, any member and AI agents. Use it to turn the user ids in an issue (reporter, assignee, created_by, …) into names, and to find the id of a person to @mention ([@Name](mention:usr_…)) or assign. People whose account was deleted or whose seat was deactivated are left out. Sorted by name. Adding or removing members is web only.

One call per project is enough: keep the list for the rest of the task. Use it to name the reporter or assignee of an issue (match user_id), and to @mention someone in add_comment / update_comment as [@Name](mention:usr_…) with the exact user_id and name from here — never invent an id. When several people share a name, ask the user which one. An item with via: "company" is in only through company-wide access (get_project company_access). Someone missing from the list cannot open the project and would not be notified.

You act with exactly the rights of the user who owns this token; a project you cannot see returns not_found.