Provenance. §1 = reviewed unit (candidate gold, Watson-grounded). §§2–3 = candidate (agent-panel self-consistency, not human-calibrated). §§4–73 = machine-assisted, unreviewed heuristic exploration. Every agreement figure here is agent-panel self-consistency (κ_agent) — a same-base-model proxy CONTROL, NOT human inter-annotator agreement. No human has annotated: humanCalibrationOnFile = false. On unseen text the hardest tier is weak (macro full-tag κ_agent = 0.57, §§2–3). Interpretive layers are valid-but-heuristic rule-sets — coverage ≠ accuracy, not a digital edition. Editorial statement · Error budget