Add production default pipeline modules

internal/framework/pipeline/walking_skeleton_test.go

@@ -135,7 +135,7 @@ func walkingSkeletonCatalog(t *testing.T) ModuleCatalog {
 		Stage:    StageMerge,
 		Requires: []string{"fake_artifacts"},
 	}, func() (contracts.Merger, error) {
-		return AppendOrderMerger{}, nil
+		return walkingSkeletonMerger{}, nil
 	}); err != nil {
 		t.Fatalf("register append-order merger: %v", err)
 	}
@@ -143,7 +143,7 @@ func walkingSkeletonCatalog(t *testing.T) ModuleCatalog {
 		Key:   DefaultNormalizeModule,
 		Stage: StageNormalize,
 	}, func() (contracts.Normalizer, error) {
-		return NoopNormalizer{}, nil
+		return walkingSkeletonNormalizer{}, nil
 	}); err != nil {
 		t.Fatalf("register no-op normalizer: %v", err)
 	}
@@ -309,6 +309,30 @@ func (client *walkingSkeletonLLMClient) CompleteStructured(ctx context.Context,
 	}, nil
 }
 
+type walkingSkeletonMerger struct{}
+
+func (merger walkingSkeletonMerger) Key() string {
+	return DefaultMergeModule
+}
+
+func (merger walkingSkeletonMerger) Merge(ctx context.Context, req contracts.MergeRequest) (contracts.MergeResult, error) {
+	var candidates []artifacts.ArtifactCandidate
+	for _, chunkArtifacts := range req.ChunkArtifacts {
+		candidates = append(candidates, chunkArtifacts.Candidates...)
+	}
+	return contracts.MergeResult{Candidates: candidates}, nil
+}
+
+type walkingSkeletonNormalizer struct{}
+
+func (normalizer walkingSkeletonNormalizer) Key() string {
+	return DefaultNormalizeModule
+}
+
+func (normalizer walkingSkeletonNormalizer) Normalize(ctx context.Context, req contracts.NormalizeRequest) (contracts.NormalizeResult, error) {
+	return contracts.NormalizeResult{Candidates: req.Candidates}, nil
+}
+
 type walkingSkeletonOutput struct{}
 
 func (output walkingSkeletonOutput) Key() string {