/work-sweep — Multi-Angle Blind Discovery

Implements the Multi-modal sweep pattern.

Orchestration shape: PARALLEL with a BARRIER at the merge

This skill is PARALLEL fan-out → BARRIER at the dedup/merge step. See the three shapes in ../work/references/workflow-mode.md §1.

• The fan-out is parallel: N blind searchers run at once, one per angle, fully independent. No barrier between searchers.
• The merge is a genuine barrier: you must wait for ALL searchers because the dedup and the completeness pass are cross-item operations — "same issue found via two paths counts once" and "what did NO angle cover?" can only be computed once every angle has reported. This is exactly the cross-item dependency that justifies a barrier (workflow-mode §1: dedup/merge across the full result set). It is not a barrier of convenience: the cross-angle comparison genuinely needs the whole set.
• The barrier is plain set logic, not an agent call. Dedup + completeness run in the orchestrator's own context against the seen set; never spawn a sub-agent to "merge".