Stay in the caller's context. Reuse or establish library context.
Reuse supplied evidence under the evidence contract. Assign collection only for unmet scope, choosing each assignment by its contribution to the question and preserving requested sources and dates. Group overlapping scopes when separate workers would repeat the same investigation. Give shared original-source checks one owner; other assignments collect distinct evidence, passing canonical leads to that owner and reusing its support.
Divide caller bounds across assignments. A total time limit includes evidence writing, gathering and final review: reserve time for those when setting read and handoff deadlines. Share the question, output requirements, ownership and deadlines; give each assignment a separate evidence directory.
Invoke search-site here once per assignment with deferred gathering. Launch independent assignments before gathering, within capacity and shared provider limits.
Gather every assignment's actual outcome by its handoff deadline; stop unfinished workers and retain partial artifacts and missing or failed assignments as gaps.
Invoke rank-evidence once with the question, all supplied and returned evidence and gaps, remaining bounds and report location.
Return the assessment. For N assignments, the workflow uses N workers and one reviewer.