semi implemented and features implemented save checkpoint

docs/features/unchecked/vexlens/trust-weight-engine-with-patch-verification.md

@@ -0,0 +1,28 @@
+# Trust Weight Engine with Patch Verification
+
+## Module
+VexLens
+
+## Status
+IMPLEMENTED
+
+## Description
+Trust weight engine with configurable weights and patch verification integration for elevated trust in backport-confirmed VEX statements.
+
+## Implementation Details
+- **Trust weight engine**: `src/VexLens/StellaOps.VexLens/Trust/TrustWeightEngine.cs`, `ITrustWeightEngine.cs` -- configurable trust weight computation
+- **Core trust engine**: `src/VexLens/StellaOps.VexLens/StellaOps.VexLens.Core/Trust/TrustWeightEngine.cs`, `ITrustWeightEngine.cs`
+- **Patch verification provider**: `src/VexLens/StellaOps.VexLens/StellaOps.VexLens.Core/Trust/PatchVerificationTrustProvider.cs` -- elevates trust for VEX statements confirmed by patch/backport verification
+- **Source trust calculator**: `src/VexLens/StellaOps.VexLens/Trust/SourceTrust/SourceTrustScoreCalculator.cs`, `ISourceTrustScoreCalculator.cs` -- multi-factor source trust scoring
+- **Provenance chain validator**: `src/VexLens/StellaOps.VexLens/Trust/SourceTrust/ProvenanceChainValidator.cs`, `IProvenanceChainValidator.cs` -- validates provenance chain for trust elevation
+- **Signature verifier**: `src/VexLens/StellaOps.VexLens/Verification/SignatureVerifier.cs`, `ISignatureVerifier.cs` -- signature strength factor
+- **Issuer directory**: `src/VexLens/StellaOps.VexLens/Verification/InMemoryIssuerDirectory.cs`, `IIssuerDirectory.cs` -- trusted issuer registry
+- **Trust score model**: `src/VexLens/StellaOps.VexLens/Trust/SourceTrust/VexSourceTrustScore.cs`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Verify trust weight increases when patch verification confirms VEX statement
+- [ ] Test trust weight computation with different source reputation levels
+- [ ] Verify signature strength contributes to trust weight
+- [ ] Test provenance chain validation elevates trust appropriately
+- [ ] Verify configurable weight parameters adjust scoring