Estimate N identical units, nesting all units together so offcuts carry across
units → realistic per-unit cost.
- build_cut_plan(quantity=N) / best_cut_plan(quantity=N) replicate CutItems
(not Parts) with a `unit` field; reoptimize infers the batch size from the
base plan and preserves it.
- project_estimate(quantity=N): materials from the N-unit plan; setup labor once
per batch, per-op time + consumables ×N; reports per-unit cost & price.
- BOM window: "Build units" spinner in the header drives the active plan; layout
labels pieces by unit ("U2 left leg"); cost tab shows total + per-unit.
- tests: replication + units, offcut sharing across units, per-unit estimate.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
rob
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