partly or unimplemented features - now implemented

docs/features/unchecked/vexlens/vexlens-truth-table-tests.md

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+# VexLens Truth Table Tests
+
+## Status
+NOT_FOUND
+
+## Description
+Systematic truth table tests for VEX lattice merge correctness. The VexLens engine exists but comprehensive truth table test coverage is missing.
+
+## Why Not Implemented
+- No systematic truth table tests for VEX lattice merge correctness found
+- The VexLens test infrastructure does exist:
+  - `src/VexLens/__Tests/StellaOps.VexLens.Tests/` -- VexLens tests project
+  - `src/VexLens/StellaOps.VexLens/__Tests/StellaOps.VexLens.Tests/` -- additional test project
+  - `src/VexLens/StellaOps.VexLens/__Tests/StellaOps.VexLens.Core.Tests/` -- core tests
+  - Tests cover: `NormalizerTests`, `PurlParserTests`, `ProductMapperTests`, `CpeParserTests`
+  - `src/VexLens/__Libraries/__Tests/StellaOps.VexLens.Spdx3.Tests/` -- SPDX3 integration tests
+- The VexLens engine has merge logic (consensus projections, delta computation) but does not have exhaustive truth table tests covering all VEX status transition combinations
+- TASKS.md files in test directories indicate planned but incomplete test coverage
+- The advisory called for systematic coverage of all status pairs (affected/not_affected/fixed/under_investigation x all transitions)
+
+## Source
+- Feature matrix scan
+
+## Notes
+- Module: VexLens
+- Modules referenced: `src/VexLens`
+- Related: `src/VexLens/__Tests/` (existing tests cover parsing/mapping but not exhaustive lattice merge truth tables)