listIssueComments reads issue discussion, including threaded replies returned by Linear’s comment filter.
automations/list-linear-comments.automation.ts
issueId accepts a UUID or identifier. orderBy is "createdAt" (default) or "updatedAt". Common page fields are limit (1–50, default 50), after, and includeArchived; optional account defaults to the project binding.
Returns { comments: LinearComment[]; pageInfo: LinearPageInfo }. Comments include body, author, issue/parent IDs, URL, and creation, update, edit, resolve, and archive dates.