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docs/features/checked/excititor/vex-annotation-and-export.md

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+# VEX annotation and export (OpenVEX + CycloneDX VEX formats)
+
+## Module
+Excititor
+
+## Status
+VERIFIED
+
+## Description
+OpenVEX, CycloneDX, and CSAF VEX normalizers plus consensus export service implement multi-format VEX annotation and export.
+
+## Implementation Details
+- **Modules**: `src/Excititor/__Libraries/StellaOps.Excititor.Export/`, `src/Excititor/__Libraries/StellaOps.Excititor.Core/`
+- **Key Classes**:
+  - `ExportEngine` (`src/Excititor/__Libraries/StellaOps.Excititor.Export/ExportEngine.cs`) - multi-format VEX export engine
+  - `VexExportManifest` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexExportManifest.cs`) - manifest tracking exported VEX data
+  - `FileSystemArtifactStore` (`src/Excititor/__Libraries/StellaOps.Excititor.Export/FileSystemArtifactStore.cs`) - file-based storage for exported artifacts
+  - `VexConsensus` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexConsensus.cs`) - consensus model for export
+  - `VexCanonicalJsonSerializer` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexCanonicalJsonSerializer.cs`) - canonical JSON for deterministic export
+  - `VexConsensusResolver` (`src/Excititor/__Libraries/StellaOps.Excititor.Core/VexConsensusResolver.cs`) - resolves consensus before export
+- **Interfaces**: `IVexArtifactStore`, `IVexExportStore`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Export VEX data in OpenVEX format via `ExportEngine` and verify schema compliance
+- [ ] Export VEX data in CycloneDX format and verify CycloneDX VEX schema compliance
+- [ ] Export VEX data in CSAF format and verify CSAF schema compliance
+- [ ] Verify `VexExportManifest` tracks all exported artifacts with content hashes
+- [ ] Verify `VexCanonicalJsonSerializer` produces deterministic output across repeated exports
+- [ ] Verify `FileSystemArtifactStore` persists exported artifacts to the configured directory
+
+## Verification
+- Verified on 2026-02-13 via `run-001`.
+- Tier 0: Source files confirmed present on disk.
+- Tier 1: `dotnet build` passed (0 errors); 503/504 tests passed (1 env_issue: no local Postgres).
+- Tier 2d: `docs/qa/feature-checks/runs/excititor/vex-annotation-and-export/run-001/tier2-integration-check.json`