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git.stella-ops.org/docs/features/checked/policy/deterministic-sbom-to-vex-pipeline-with-signed-state-transitions.md
2026-02-13 02:04:55 +02:00

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# Deterministic SBOM-to-VEX Pipeline with Signed State Transitions
## Module
Policy
## Status
VERIFIED
## Verification Summary
Full verdict pipeline determinism verified across 2 test projects (1716 tests total, 0 failures):
- **DeterminizationGate**: signal snapshot-based evaluation with uncertainty/trust/decay/guardrail metadata
- **DeterminismGuardService**: static analysis (ProhibitedPatternAnalyzer) and runtime monitoring
- **VerdictAttestationService**: DSSE-signed verdict decisions with deterministic predicate JSON
- **ScoringDeterminismVerifier**: scoring drift detection on weight changes
- **KnowledgeSnapshotManifest**: content-addressed snapshot pinning all inputs
- **PolicyGateEvaluator**: VEX state transition validation with DSSE-attested graphHash and path analysis
- Error handling: attestor unavailable and timeout return null (soft failure when FailOnError=false)
## Evidence
- `docs/qa/feature-checks/runs/policy/deterministic-sbom-to-vex-pipeline-with-signed-state-transitions/run-002/`