Reuse parsed validation content by blob

internal/validation/markdown_check_test.go

@@ -150,6 +150,24 @@ func TestCheckMarkdownLinksUsesResolvedMarkdownIdentity(t *testing.T) {
 	}
 }
 
+func TestCheckMarkdownLinksUsesCurrentPathForSharedDocuments(t *testing.T) {
+	shared := []byte("[target](target.md)\n")
+	_, tree := committedMarkdownTree(t, map[string][]byte{
+		"one/guide.md":  shared,
+		"one/target.md": []byte("# Target\n"),
+		"two/guide.md":  shared,
+	})
+
+	err := checkMarkdownLinks(context.Background(), tree, false, nil)
+	var failure *Failure
+	if !errors.As(err, &failure) || failure.Check != MarkdownLinks || len(failure.Findings) != 1 {
+		t.Fatalf("checkMarkdownLinks() error = %v, want one path-specific finding", err)
+	}
+	if finding := failure.Findings[0]; finding.Path != "two/guide.md" || finding.Target != "target.md" {
+		t.Fatalf("shared-document finding = %#v, want missing target relative to two/guide.md", finding)
+	}
+}
+
 func TestCheckMarkdownLinksReportsBoundaryAndSubmoduleObservations(t *testing.T) {
 	repository, tree := committedMarkdownTree(t, map[string][]byte{
 		"guide.md": []byte("[outside](../../outside.md)\n[submodule](deps/module/README.md)\n"),