diff --git a/crates/codegen/runtime/npm/package/src/runtime/cst/index.mts b/crates/codegen/runtime/npm/package/src/runtime/cst/index.mts
index a22005f1ce..4ad2bc383b 100644
--- a/crates/codegen/runtime/npm/package/src/runtime/cst/index.mts
+++ b/crates/codegen/runtime/npm/package/src/runtime/cst/index.mts
@@ -14,8 +14,8 @@ export type EdgeLabel = generated.cst.EdgeLabel;
 
 export type Node = generated.cst.Node;
 
-export const NodeVariant = generated.cst.NodeVariant;
-export type NodeVariant = generated.cst.NodeVariant;
+export const NodeType = generated.cst.NodeType;
+export type NodeType = generated.cst.NodeType;
 
 export const NonterminalNode = generated.cst.NonterminalNode;
 export type NonterminalNode = generated.cst.NonterminalNode;
diff --git a/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts b/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
index 138e7f7f89..f73857b6a4 100644
--- a/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
+++ b/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
@@ -7,7 +7,6 @@ import type { Node } from "./nomic-foundation-slang-cst.js";
 export { Node };
 import type { NonterminalNode } from "./nomic-foundation-slang-cst.js";
 export { NonterminalNode };
-
 export class Selectors {
   static sequence(node: NonterminalNode): (Node | undefined)[];
   static choice(node: NonterminalNode): Node;
diff --git a/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts b/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
index 8c5babbfdd..d851d5ca9d 100644
--- a/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
+++ b/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
@@ -13,7 +13,7 @@ export namespace NomicFoundationSlangCst {
   export { TerminalKind };
   export { EdgeLabel };
   export { Node };
-  export { NodeVariant };
+  export { NodeType };
 }
 /**
  * Represents different kinds of nonterminal nodes in the syntax tree.
@@ -90,7 +90,7 @@ export declare enum EdgeLabel {
  * The super type of all nodes in a tree.
  */
 export type Node = NonterminalNode | TerminalNode;
-export enum NodeVariant {
+export enum NodeType {
   NonterminalNode = "NonterminalNode",
   TerminalNode = "TerminalNode",
 }
@@ -181,6 +181,9 @@ export interface TextRange {
   end: TextIndex;
 }
 
+/**
+ * Iterator over all ancestors of the current node, starting with the immediate parent, and moving upwards, ending with the root node.
+ */
 export class AncestorsIterator {
   [Symbol.iterator](): Iterator<NonterminalNode>;
   /**
@@ -189,6 +192,9 @@ export class AncestorsIterator {
   next(): NonterminalNode | undefined;
 }
 
+/**
+ * Provides navigation and traversal capabilities over the syntax tree.
+ */
 export class Cursor {
   /**
    * Resets the cursor to its initial position.
@@ -316,6 +322,9 @@ export class Cursor {
   query(queries: Query[]): QueryMatchIterator;
 }
 
+/**
+ * Iterator over all the remaining nodes in the current tree, moving in pre-order traversal, until the tree is completed.
+ */
 export class CursorIterator {
   [Symbol.iterator](): Iterator<Edge>;
   /**
@@ -324,13 +333,34 @@ export class CursorIterator {
   next(): Edge | undefined;
 }
 
+/**
+ * Represents a non-terminal node in the syntax tree.
+ * These nodes can have child nodes and represent language constructs.
+ */
 export class NonterminalNode {
-  readonly nodeVariant = NodeVariant.NonterminalNode;
+  /**
+   * The variant of `NodeType` that corresponds to this class.
+   */
+  readonly type = NodeType.NonterminalNode;
 
+  /**
+   * Coerce this variant to a `NonterminalNode`, or `undefined` if this is not the correct type.
+   */
   asNonterminalNode(): this;
+
+  /**
+   * Return `true` if this object is an instance of `NonterminalNode`.
+   */
   isNonterminalNode(): this is NonterminalNode;
 
+  /**
+   * Coerce this variant to a `TerminalNode`, or `undefined` if this is not the correct type.
+   */
   asTerminalNode(): undefined;
+
+  /**
+   * Return `true` if this object is an instance of `TerminalNode`.
+   */
   isTerminalNode(): false;
 
   /**
@@ -369,6 +399,9 @@ export class NonterminalNode {
   createCursor(textOffset: TextIndex): Cursor;
 }
 
+/**
+ * Represents a tree query for pattern matching in the syntax tree.
+ */
 export class Query {
   /**
    * Parses a query string into a query object.
@@ -377,6 +410,9 @@ export class Query {
   static parse(text: string): Query;
 }
 
+/**
+ * Iterator over query matches in the syntax tree.
+ */
 export class QueryMatchIterator {
   [Symbol.iterator](): Iterator<QueryMatch>;
   /**
@@ -385,6 +421,9 @@ export class QueryMatchIterator {
   next(): QueryMatch | undefined;
 }
 
+/**
+ * Useful extension methods for working with terminals and terminal kinds.
+ */
 export class TerminalKindExtensions {
   /**
    * Returns true if the terminal is a trivia token. i.e. whitespace, comments, etc...
@@ -396,13 +435,34 @@ export class TerminalKindExtensions {
   static isValid(kind: TerminalKind): boolean;
 }
 
+/**
+ * Represents a terminal node in the syntax tree.
+ * These are leaf nodes that represent actual tokens from the source code.
+ */
 export class TerminalNode {
-  readonly nodeVariant = NodeVariant.TerminalNode;
+  /**
+   * The variant of `NodeType` that corresponds to this class.
+   */
+  readonly type = NodeType.TerminalNode;
 
+  /**
+   * Coerce this variant to a `TerminalNode`, or `undefined` if this is not the correct type.
+   */
   asTerminalNode(): this;
+
+  /**
+   * Return `true` if this object is an instance of `TerminalNode`.
+   */
   isTerminalNode(): this is TerminalNode;
 
+  /**
+   * Coerce this variant to a `NonterminalNode`, or `undefined` if this is not the correct type.
+   */
   asNonterminalNode(): undefined;
+
+  /**
+   * Return `true` if this object is an instance of `NonterminalNode`.
+   */
   isNonterminalNode(): false;
 
   /**
diff --git a/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts b/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
index 9d24311b88..bc99b8e132 100644
--- a/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
+++ b/crates/codegen/runtime/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
@@ -14,6 +14,9 @@ export { NonterminalKind };
 import type { TextRange } from "./nomic-foundation-slang-cst.js";
 export { TextRange };
 
+/**
+ * Contains information about where the error occurred and what went wrong.
+ */
 export class ParseError {
   /**
    * Returns the text range where the error occurred in the source code.
@@ -25,6 +28,10 @@ export class ParseError {
   get message(): string;
 }
 
+/**
+ * The output of a parsing operation.
+ * Contains the resulting syntax tree and any errors encountered during parsing.
+ */
 export class ParseOutput {
   /**
    * Returns the root node of the parsed syntax tree.
@@ -48,6 +55,10 @@ export class ParseOutput {
   createTreeCursor(): Cursor;
 }
 
+/**
+ * A parser instance that can parse source code into syntax trees.
+ * Each parser is configured for a specific language version and grammar.
+ */
 export class Parser {
   /**
    * Returns the root nonterminal kind for this parser's grammar.
diff --git a/crates/solidity/outputs/npm/package/src/generated/cst/index.mts b/crates/solidity/outputs/npm/package/src/generated/cst/index.mts
index 39bc7cfd94..9ceb7c6f40 100644
--- a/crates/solidity/outputs/npm/package/src/generated/cst/index.mts
+++ b/crates/solidity/outputs/npm/package/src/generated/cst/index.mts
@@ -16,8 +16,8 @@ export type EdgeLabel = generated.cst.EdgeLabel;
 
 export type Node = generated.cst.Node;
 
-export const NodeVariant = generated.cst.NodeVariant;
-export type NodeVariant = generated.cst.NodeVariant;
+export const NodeType = generated.cst.NodeType;
+export type NodeType = generated.cst.NodeType;
 
 export const NonterminalNode = generated.cst.NonterminalNode;
 export type NonterminalNode = generated.cst.NonterminalNode;
diff --git a/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts b/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
index 138e7f7f89..f73857b6a4 100644
--- a/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
+++ b/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
@@ -7,7 +7,6 @@ import type { Node } from "./nomic-foundation-slang-cst.js";
 export { Node };
 import type { NonterminalNode } from "./nomic-foundation-slang-cst.js";
 export { NonterminalNode };
-
 export class Selectors {
   static sequence(node: NonterminalNode): (Node | undefined)[];
   static choice(node: NonterminalNode): Node;
diff --git a/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts b/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
index 9e1b37d948..1d8e203320 100644
--- a/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
+++ b/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
@@ -13,7 +13,7 @@ export namespace NomicFoundationSlangCst {
   export { TerminalKind };
   export { EdgeLabel };
   export { Node };
-  export { NodeVariant };
+  export { NodeType };
 }
 /**
  * Represents different kinds of nonterminal nodes in the syntax tree.
@@ -5964,7 +5964,7 @@ export declare enum EdgeLabel {
  * The super type of all nodes in a tree.
  */
 export type Node = NonterminalNode | TerminalNode;
-export enum NodeVariant {
+export enum NodeType {
   NonterminalNode = "NonterminalNode",
   TerminalNode = "TerminalNode",
 }
@@ -6055,6 +6055,9 @@ export interface TextRange {
   end: TextIndex;
 }
 
+/**
+ * Iterator over all ancestors of the current node, starting with the immediate parent, and moving upwards, ending with the root node.
+ */
 export class AncestorsIterator {
   [Symbol.iterator](): Iterator<NonterminalNode>;
   /**
@@ -6063,6 +6066,9 @@ export class AncestorsIterator {
   next(): NonterminalNode | undefined;
 }
 
+/**
+ * Provides navigation and traversal capabilities over the syntax tree.
+ */
 export class Cursor {
   /**
    * Resets the cursor to its initial position.
@@ -6190,6 +6196,9 @@ export class Cursor {
   query(queries: Query[]): QueryMatchIterator;
 }
 
+/**
+ * Iterator over all the remaining nodes in the current tree, moving in pre-order traversal, until the tree is completed.
+ */
 export class CursorIterator {
   [Symbol.iterator](): Iterator<Edge>;
   /**
@@ -6198,13 +6207,34 @@ export class CursorIterator {
   next(): Edge | undefined;
 }
 
+/**
+ * Represents a non-terminal node in the syntax tree.
+ * These nodes can have child nodes and represent language constructs.
+ */
 export class NonterminalNode {
-  readonly nodeVariant = NodeVariant.NonterminalNode;
+  /**
+   * The variant of `NodeType` that corresponds to this class.
+   */
+  readonly type = NodeType.NonterminalNode;
 
+  /**
+   * Coerce this variant to a `NonterminalNode`, or `undefined` if this is not the correct type.
+   */
   asNonterminalNode(): this;
+
+  /**
+   * Return `true` if this object is an instance of `NonterminalNode`.
+   */
   isNonterminalNode(): this is NonterminalNode;
 
+  /**
+   * Coerce this variant to a `TerminalNode`, or `undefined` if this is not the correct type.
+   */
   asTerminalNode(): undefined;
+
+  /**
+   * Return `true` if this object is an instance of `TerminalNode`.
+   */
   isTerminalNode(): false;
 
   /**
@@ -6243,6 +6273,9 @@ export class NonterminalNode {
   createCursor(textOffset: TextIndex): Cursor;
 }
 
+/**
+ * Represents a tree query for pattern matching in the syntax tree.
+ */
 export class Query {
   /**
    * Parses a query string into a query object.
@@ -6251,6 +6284,9 @@ export class Query {
   static parse(text: string): Query;
 }
 
+/**
+ * Iterator over query matches in the syntax tree.
+ */
 export class QueryMatchIterator {
   [Symbol.iterator](): Iterator<QueryMatch>;
   /**
@@ -6259,6 +6295,9 @@ export class QueryMatchIterator {
   next(): QueryMatch | undefined;
 }
 
+/**
+ * Useful extension methods for working with terminals and terminal kinds.
+ */
 export class TerminalKindExtensions {
   /**
    * Returns true if the terminal is a trivia token. i.e. whitespace, comments, etc...
@@ -6270,13 +6309,34 @@ export class TerminalKindExtensions {
   static isValid(kind: TerminalKind): boolean;
 }
 
+/**
+ * Represents a terminal node in the syntax tree.
+ * These are leaf nodes that represent actual tokens from the source code.
+ */
 export class TerminalNode {
-  readonly nodeVariant = NodeVariant.TerminalNode;
+  /**
+   * The variant of `NodeType` that corresponds to this class.
+   */
+  readonly type = NodeType.TerminalNode;
 
+  /**
+   * Coerce this variant to a `TerminalNode`, or `undefined` if this is not the correct type.
+   */
   asTerminalNode(): this;
+
+  /**
+   * Return `true` if this object is an instance of `TerminalNode`.
+   */
   isTerminalNode(): this is TerminalNode;
 
+  /**
+   * Coerce this variant to a `NonterminalNode`, or `undefined` if this is not the correct type.
+   */
   asNonterminalNode(): undefined;
+
+  /**
+   * Return `true` if this object is an instance of `NonterminalNode`.
+   */
   isNonterminalNode(): false;
 
   /**
diff --git a/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts b/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
index 9d24311b88..bc99b8e132 100644
--- a/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
+++ b/crates/solidity/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
@@ -14,6 +14,9 @@ export { NonterminalKind };
 import type { TextRange } from "./nomic-foundation-slang-cst.js";
 export { TextRange };
 
+/**
+ * Contains information about where the error occurred and what went wrong.
+ */
 export class ParseError {
   /**
    * Returns the text range where the error occurred in the source code.
@@ -25,6 +28,10 @@ export class ParseError {
   get message(): string;
 }
 
+/**
+ * The output of a parsing operation.
+ * Contains the resulting syntax tree and any errors encountered during parsing.
+ */
 export class ParseOutput {
   /**
    * Returns the root node of the parsed syntax tree.
@@ -48,6 +55,10 @@ export class ParseOutput {
   createTreeCursor(): Cursor;
 }
 
+/**
+ * A parser instance that can parse source code into syntax trees.
+ * Each parser is configured for a specific language version and grammar.
+ */
 export class Parser {
   /**
    * Returns the root nonterminal kind for this parser's grammar.
diff --git a/crates/testlang/outputs/npm/package/src/generated/cst/index.mts b/crates/testlang/outputs/npm/package/src/generated/cst/index.mts
index 39bc7cfd94..9ceb7c6f40 100644
--- a/crates/testlang/outputs/npm/package/src/generated/cst/index.mts
+++ b/crates/testlang/outputs/npm/package/src/generated/cst/index.mts
@@ -16,8 +16,8 @@ export type EdgeLabel = generated.cst.EdgeLabel;
 
 export type Node = generated.cst.Node;
 
-export const NodeVariant = generated.cst.NodeVariant;
-export type NodeVariant = generated.cst.NodeVariant;
+export const NodeType = generated.cst.NodeType;
+export type NodeType = generated.cst.NodeType;
 
 export const NonterminalNode = generated.cst.NonterminalNode;
 export type NonterminalNode = generated.cst.NonterminalNode;
diff --git a/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts b/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
index 138e7f7f89..f73857b6a4 100644
--- a/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
+++ b/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-ast.d.ts
@@ -7,7 +7,6 @@ import type { Node } from "./nomic-foundation-slang-cst.js";
 export { Node };
 import type { NonterminalNode } from "./nomic-foundation-slang-cst.js";
 export { NonterminalNode };
-
 export class Selectors {
   static sequence(node: NonterminalNode): (Node | undefined)[];
   static choice(node: NonterminalNode): Node;
diff --git a/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts b/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
index 45a4f18ed3..5e6d97a7dc 100644
--- a/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
+++ b/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-cst.d.ts
@@ -13,7 +13,7 @@ export namespace NomicFoundationSlangCst {
   export { TerminalKind };
   export { EdgeLabel };
   export { Node };
-  export { NodeVariant };
+  export { NodeType };
 }
 /**
  * Represents different kinds of nonterminal nodes in the syntax tree.
@@ -302,7 +302,7 @@ export declare enum EdgeLabel {
  * The super type of all nodes in a tree.
  */
 export type Node = NonterminalNode | TerminalNode;
-export enum NodeVariant {
+export enum NodeType {
   NonterminalNode = "NonterminalNode",
   TerminalNode = "TerminalNode",
 }
@@ -393,6 +393,9 @@ export interface TextRange {
   end: TextIndex;
 }
 
+/**
+ * Iterator over all ancestors of the current node, starting with the immediate parent, and moving upwards, ending with the root node.
+ */
 export class AncestorsIterator {
   [Symbol.iterator](): Iterator<NonterminalNode>;
   /**
@@ -401,6 +404,9 @@ export class AncestorsIterator {
   next(): NonterminalNode | undefined;
 }
 
+/**
+ * Provides navigation and traversal capabilities over the syntax tree.
+ */
 export class Cursor {
   /**
    * Resets the cursor to its initial position.
@@ -528,6 +534,9 @@ export class Cursor {
   query(queries: Query[]): QueryMatchIterator;
 }
 
+/**
+ * Iterator over all the remaining nodes in the current tree, moving in pre-order traversal, until the tree is completed.
+ */
 export class CursorIterator {
   [Symbol.iterator](): Iterator<Edge>;
   /**
@@ -536,13 +545,34 @@ export class CursorIterator {
   next(): Edge | undefined;
 }
 
+/**
+ * Represents a non-terminal node in the syntax tree.
+ * These nodes can have child nodes and represent language constructs.
+ */
 export class NonterminalNode {
-  readonly nodeVariant = NodeVariant.NonterminalNode;
+  /**
+   * The variant of `NodeType` that corresponds to this class.
+   */
+  readonly type = NodeType.NonterminalNode;
 
+  /**
+   * Coerce this variant to a `NonterminalNode`, or `undefined` if this is not the correct type.
+   */
   asNonterminalNode(): this;
+
+  /**
+   * Return `true` if this object is an instance of `NonterminalNode`.
+   */
   isNonterminalNode(): this is NonterminalNode;
 
+  /**
+   * Coerce this variant to a `TerminalNode`, or `undefined` if this is not the correct type.
+   */
   asTerminalNode(): undefined;
+
+  /**
+   * Return `true` if this object is an instance of `TerminalNode`.
+   */
   isTerminalNode(): false;
 
   /**
@@ -581,6 +611,9 @@ export class NonterminalNode {
   createCursor(textOffset: TextIndex): Cursor;
 }
 
+/**
+ * Represents a tree query for pattern matching in the syntax tree.
+ */
 export class Query {
   /**
    * Parses a query string into a query object.
@@ -589,6 +622,9 @@ export class Query {
   static parse(text: string): Query;
 }
 
+/**
+ * Iterator over query matches in the syntax tree.
+ */
 export class QueryMatchIterator {
   [Symbol.iterator](): Iterator<QueryMatch>;
   /**
@@ -597,6 +633,9 @@ export class QueryMatchIterator {
   next(): QueryMatch | undefined;
 }
 
+/**
+ * Useful extension methods for working with terminals and terminal kinds.
+ */
 export class TerminalKindExtensions {
   /**
    * Returns true if the terminal is a trivia token. i.e. whitespace, comments, etc...
@@ -608,13 +647,34 @@ export class TerminalKindExtensions {
   static isValid(kind: TerminalKind): boolean;
 }
 
+/**
+ * Represents a terminal node in the syntax tree.
+ * These are leaf nodes that represent actual tokens from the source code.
+ */
 export class TerminalNode {
-  readonly nodeVariant = NodeVariant.TerminalNode;
+  /**
+   * The variant of `NodeType` that corresponds to this class.
+   */
+  readonly type = NodeType.TerminalNode;
 
+  /**
+   * Coerce this variant to a `TerminalNode`, or `undefined` if this is not the correct type.
+   */
   asTerminalNode(): this;
+
+  /**
+   * Return `true` if this object is an instance of `TerminalNode`.
+   */
   isTerminalNode(): this is TerminalNode;
 
+  /**
+   * Coerce this variant to a `NonterminalNode`, or `undefined` if this is not the correct type.
+   */
   asNonterminalNode(): undefined;
+
+  /**
+   * Return `true` if this object is an instance of `NonterminalNode`.
+   */
   isNonterminalNode(): false;
 
   /**
diff --git a/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts b/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
index 9d24311b88..bc99b8e132 100644
--- a/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
+++ b/crates/testlang/outputs/npm/package/wasm/generated/interfaces/nomic-foundation-slang-parser.d.ts
@@ -14,6 +14,9 @@ export { NonterminalKind };
 import type { TextRange } from "./nomic-foundation-slang-cst.js";
 export { TextRange };
 
+/**
+ * Contains information about where the error occurred and what went wrong.
+ */
 export class ParseError {
   /**
    * Returns the text range where the error occurred in the source code.
@@ -25,6 +28,10 @@ export class ParseError {
   get message(): string;
 }
 
+/**
+ * The output of a parsing operation.
+ * Contains the resulting syntax tree and any errors encountered during parsing.
+ */
 export class ParseOutput {
   /**
    * Returns the root node of the parsed syntax tree.
@@ -48,6 +55,10 @@ export class ParseOutput {
   createTreeCursor(): Cursor;
 }
 
+/**
+ * A parser instance that can parse source code into syntax trees.
+ * Each parser is configured for a specific language version and grammar.
+ */
 export class Parser {
   /**
    * Returns the root nonterminal kind for this parser's grammar.
diff --git a/crates/testlang/outputs/npm/tests/src/cst/cursor.test.mts b/crates/testlang/outputs/npm/tests/src/cst/cursor.test.mts
index 2a69cfb088..a719094355 100644
--- a/crates/testlang/outputs/npm/tests/src/cst/cursor.test.mts
+++ b/crates/testlang/outputs/npm/tests/src/cst/cursor.test.mts
@@ -2,7 +2,7 @@ import { Parser } from "@slang-private/testlang-npm-package/parser";
 import {
   Cursor,
   EdgeLabel,
-  NodeVariant,
+  NodeType,
   assertIsNonterminalNode,
   assertIsTerminalNode,
   NonterminalKind,
@@ -112,10 +112,7 @@ test("access the node using its name", () => {
       const node = innerCursor.node;
       const label = innerCursor.label;
 
-      if (
-        node.nodeVariant == NodeVariant.TerminalNode &&
-        (label == EdgeLabel.OpenBracket || label == EdgeLabel.CloseBracket)
-      ) {
+      if (node.type == NodeType.TerminalNode && (label == EdgeLabel.OpenBracket || label == EdgeLabel.CloseBracket)) {
         names.push(node.unparse());
       }
     }
diff --git a/submodules/jco b/submodules/jco
index 51b184c43b..0e0a0b2cfc 160000
--- a/submodules/jco
+++ b/submodules/jco
@@ -1 +1 @@
-Subproject commit 51b184c43b35ad350989a55e4a8983ebf4861088
+Subproject commit 0e0a0b2cfc01ecfa65ef86becfff58de2ce4535f