chore: import upstream snapshot with attribution

internal/markdown/ast/mention.go

@@ -0,0 +1,28 @@
+package ast
+
+import (
+	gast "github.com/yuin/goldmark/ast"
+)
+
+// MentionNode represents an @mention in the markdown AST.
+type MentionNode struct {
+	gast.BaseInline
+
+	// Username without the @ prefix.
+	Username []byte
+}
+
+// KindMention is the NodeKind for MentionNode.
+var KindMention = gast.NewNodeKind("Mention")
+
+// Kind returns KindMention.
+func (*MentionNode) Kind() gast.NodeKind {
+	return KindMention
+}
+
+// Dump implements Node.Dump for debugging.
+func (n *MentionNode) Dump(source []byte, level int) {
+	gast.DumpHelper(n, source, level, map[string]string{
+		"Username": string(n.Username),
+	}, nil)
+}

internal/markdown/ast/tag.go

@@ -0,0 +1,28 @@
+package ast
+
+import (
+	gast "github.com/yuin/goldmark/ast"
+)
+
+// TagNode represents a #tag in the markdown AST.
+type TagNode struct {
+	gast.BaseInline
+
+	// Tag name without the # prefix
+	Tag []byte
+}
+
+// KindTag is the NodeKind for TagNode.
+var KindTag = gast.NewNodeKind("Tag")
+
+// Kind returns KindTag.
+func (*TagNode) Kind() gast.NodeKind {
+	return KindTag
+}
+
+// Dump implements Node.Dump for debugging.
+func (n *TagNode) Dump(source []byte, level int) {
+	gast.DumpHelper(n, source, level, map[string]string{
+		"Tag": string(n.Tag),
+	}, nil)
+}