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Severity Fusion Prep — PREP-POLICY-ENGINE-40-001-SEVERITY-FUSION-DEP

Status: Draft (2025-11-20) Owners: Policy Guild · Concelier Guild Scope: Capture severity fusion requirements using violation events (38-201).

Dependencies

  • Violation event schema (38-201).
  • Concelier severity sources + lattice rules; Policy weighting outputs (30-101).

Draft fusion rules

  • Inputs: violation events with status + severity + advisory/confidence.
  • Rules: deterministic lattice; combine source severities with weights from 30-101; tie-break via Concelier source ranking; emit severity_fused, reason_codes[], sources[] with weights.
  • Determinism: sort sources lexicographically; fixed numeric precision (scale 3).

Acceptance

  • Schema draft at docs/modules/policy/schemas/severity-fusion@draft.json and sample at docs/modules/policy/samples/severity-fusion@draft.json.
  • Document weight caps and rounding rules.

Handoff

Prep artefact for PREP-POLICY-ENGINE-40-001-SEVERITY-FUSION-DEP. Finalize once violation events and Concelier severity ranking are frozen.