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git.stella-ops.org/docs/features/checked/policy/delta-verdict-engine.md
2026-02-13 02:04:55 +02:00

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Delta Verdict Engine

Module

Policy

Status

VERIFIED

Verification Summary

Full delta verdict computation verified across 3 test projects (2059 tests total, 0 failures):

  • WhatIfSimulationService: hypothetical SBOM diffs (add/remove/upgrade/downgrade) with VEX override and reachability downgrade
  • DeltaVerdictBuilder: content-addressed VerdictId, gate escalation (Critical->G4, High->G3), PassWithExceptions
  • ConsoleSimulationDiffService: deterministic delta diff with severity breakdowns, rule impact, explain samples
  • SimulationAnalyticsService: delta summary with outcome/severity change tracking, high-impact findings, determinism hashes
  • EffectiveDecisionMap: materialized baseline decisions for delta comparison
  • PolicyEngineDeterminismTests: same inputs produce identical verdict hashes, order-independent, concurrent-safe

Evidence

  • docs/qa/feature-checks/runs/policy/delta-verdict-engine/run-002/