From 76cb9c2a39d477a64824a985ade40507e3bbade1 Mon Sep 17 00:00:00 2001
From: Adam Mathes <adam@adammathes.com>
Date: Fri, 13 Feb 2026 21:34:48 -0800
Subject: feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

---
 vanilla/node_modules/ast-v8-to-istanbul/LICENSE    |  21 +
 vanilla/node_modules/ast-v8-to-istanbul/README.md  | 278 +++++++
 .../ast-v8-to-istanbul/dist/index.d.mts            | 568 ++++++++++++++
 .../node_modules/ast-v8-to-istanbul/dist/index.mjs | 848 +++++++++++++++++++++
 .../node_modules/ast-v8-to-istanbul/package.json   |  71 ++
 5 files changed, 1786 insertions(+)
 create mode 100644 vanilla/node_modules/ast-v8-to-istanbul/LICENSE
 create mode 100644 vanilla/node_modules/ast-v8-to-istanbul/README.md
 create mode 100644 vanilla/node_modules/ast-v8-to-istanbul/dist/index.d.mts
 create mode 100644 vanilla/node_modules/ast-v8-to-istanbul/dist/index.mjs
 create mode 100644 vanilla/node_modules/ast-v8-to-istanbul/package.json

(limited to 'vanilla/node_modules/ast-v8-to-istanbul')

diff --git a/vanilla/node_modules/ast-v8-to-istanbul/LICENSE b/vanilla/node_modules/ast-v8-to-istanbul/LICENSE
new file mode 100644
index 0000000..073bd2a
--- /dev/null
+++ b/vanilla/node_modules/ast-v8-to-istanbul/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Ari Perkkiö
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/vanilla/node_modules/ast-v8-to-istanbul/README.md b/vanilla/node_modules/ast-v8-to-istanbul/README.md
new file mode 100644
index 0000000..e4aa256
--- /dev/null
+++ b/vanilla/node_modules/ast-v8-to-istanbul/README.md
@@ -0,0 +1,278 @@
+# `ast-v8-to-istanbul`
+
+[![Version][version-badge]][npm-url]
+[![Downloads][downloads-url]][npm-url]
+
+> - Speed of V8 coverage 🏎
+> - Accuracy of Istanbul coverage 🔍
+
+[Ignoring code](#ignoring-code) | [Source maps](#source-maps) | [Istanbul Compatibility](#istanbul-compatibility) | [Limitations](#limitations)
+
+---
+
+AST-aware [`v8-to-istanbul`](https://www.npmjs.com/package/v8-to-istanbul).
+
+Unopinionated - _bring-your-own_ AST parser and source maps.
+
+Passes all 195 tests<sup>[*](#istanbul-compatibility)</sup> of [`istanbul-lib-instrument`](https://github.com/istanbuljs/istanbuljs/tree/main/packages/istanbul-lib-instrument/test/specs). ✅
+
+Test cases run against:
+- `vite/parseAst` ✅
+- `acorn` ✅
+- `oxc-parser` ✅
+- `@babel/parser` ✅
+
+See example report at https://ariperkkio.github.io/ast-v8-to-istanbul.
+
+```ts
+import { convert } from "ast-v8-to-istanbul";
+import { parseAstAsync } from "vite";
+import type { CoverageMapData } from "istanbul-lib-coverage";
+
+const data: CoverageMapData = await convert({
+  // Bring-your-own AST parser
+  ast: parseAstAsync(<code>),
+
+  // Code of the executed file (not the source file)
+  code: "function sum(a, b) {\n  return a + b ...",
+
+  // Execution wrapper offset
+  wrapperLength: 0,
+
+  // Script coverage of the executed file
+  coverage: {
+    scriptId: "123",
+    url: "file:///absolute/path/to/dist/index.js",
+    functions: [
+      {
+        functionName: "sum",
+        ranges: [{ startOffset: 223, endOffset: 261, count: 0 }],
+        isBlockCoverage: false,
+      },
+      // ... etc
+    ],
+  },
+
+  // Source map of the executed file
+  sourceMap: {
+    version: 3,
+    sources: ["../sources.ts"],
+    sourcesContent: ["export function sum(a: number, b: number) {\n..."],
+    mappings: ";AAAO,SAAS,...",
+    names: [],
+  },
+});
+```
+
+## Ignoring code
+
+### Ignoring source code
+
+#### Ignore hints
+
+See live example at https://ariperkkio.github.io/ast-v8-to-istanbul/ignore-examples.html.
+
+The typical ignore hints from `nyc` are supported: https://github.com/istanbuljs/nyc?tab=readme-ov-file#parsing-hints-ignoring-lines:
+
+> * `/* istanbul ignore if */`: ignore the next if statement.
+> * `/* istanbul ignore else */`: ignore the else portion of an if statement.
+> * `/* istanbul ignore next */`: ignore the next _thing_ in the source-code (functions, if statements, classes, you name it).
+> * `/* istanbul ignore file */`: ignore an entire source-file (this should be placed at the top of the file).
+
+In addition to `istanbul` keyword, you can use `v8`, `c8` and `node:coverage`:
+
+- `/* istanbul ignore if */`
+- `/* v8 ignore else */`
+- `/* c8 ignore file */`
+- `/* node:coverage ignore next */`
+
+Also `start` and `stop` ignore hints from original [`v8-to-istanbul`](https://www.npmjs.com/package/v8-to-istanbul) are supported.
+These ignore hints are checked from the original sources instead of transpiled code.
+
+> * `/* v8 ignore start */`: start ignoring lines
+> * `/* v8 ignore stop */`: stop ignoring lines
+> * `<!-- /* v8 ignore start */ -->`: start ignoring lines
+> * `<!-- /* v8 ignore stop */ -->`: stop ignoring lines
+> * `anything /* v8 ignore start */ anything`: start ignoring lines
+> * `anything /* v8 ignore stop */ anything`: stop ignoring lines
+
+#### Class methods
+
+The `ignore-class-method` from `nyc` is also supported: https://github.com/istanbuljs/nyc?tab=readme-ov-file#ignoring-methods
+
+> You can ignore every instance of a method simply by adding its name to the `ignore-class-method` array in your `nyc` config.
+
+```ts
+import { convert } from "ast-v8-to-istanbul";
+
+await convert({
+  ignoreClassMethods: ['render']
+});
+```
+
+#### Ignore after remapping
+
+You can ignore source code after coverage results have been remapped back to original sources using `ignoreSourceCode`.
+This is a high level API that can be exposed to end-users by tooling developers.
+
+It's mostly intended for excluding code that is incorrectly shown in coverage report when compilers add generated code in the source maps.
+
+Note that as the exclusion happens after remapping, this option is slower than [`ignoreNode`](#ignoring-generated-code) option.
+
+```ts
+function ignoreSourceCode(
+  code: string,
+  type: "function" | "statement" | "branch",
+  location: Record<"start" | "end", { line: number; column: number }>,
+): boolean | void;
+```
+
+```ts
+import { convert } from "ast-v8-to-istanbul";
+
+await convert({
+  ignoreSourceCode: (code, type, location) => {
+    // Ignore all "noop()" calls
+    if(type === "function" && code.includes("noop(")) {
+      return true;
+    }
+
+    // In Vue "<script>" tags generate code that is incorrectly left in source maps - exclude it
+    if(code === '<script>') {
+      return true;
+    }
+
+    // Ignore anything above line 5
+    return location.start.line < 5;
+  },
+});
+```
+
+### Ignoring generated code
+
+This API is mostly for developers integrating `ast-v8-to-istanbul` with other tooling.
+
+If your code transform pipeline is adding generated code that's included in the source maps, it will be included in coverage too.
+You can exclude these known patterns by defining `ignoreNode` for filtering such nodes.
+
+By returning `"ignore-this-and-nested-nodes"` from the handler, you can ignore all nested nodes too.
+This can be useful when you need to ignore everything a certain node wraps, e.g. `IfStatement`.
+
+```ts
+function ignoreNode(
+  node: Node,
+  type: "branch" | "function" | "statement"
+): boolean | "ignore-this-and-nested-nodes" | void;
+```
+
+```ts
+import { convert } from "ast-v8-to-istanbul";
+
+await convert({
+  ignoreNode: (node, type) => {
+    // Ignore all `await __vite_ssr_import__( ... )` calls that Vite SSR transform adds
+    return (
+      type === "statement" &&
+      node.type === "AwaitExpression" &&
+      node.argument.type === "CallExpression" &&
+      node.argument.callee.type === "Identifier" &&
+      node.argument.callee.name === "__vite_ssr_import__"
+    );
+  },
+});
+```
+
+## Source maps
+
+Source maps are optional and supported by various ways:
+
+- Pass directly to `convert` as argument:
+  ```ts
+  import { convert } from "ast-v8-to-istanbul";
+
+  await convert({
+    sourceMap: {
+      version: 3,
+      sources: ["../sources.ts"],
+      sourcesContent: ["export function sum(a: number, b: number) {\n..."],
+      mappings: ";AAAO,SAAS,...",
+      names: [],
+    }
+  });
+  ```
+- Include base64 encoded inline maps in `code`:
+  ```ts
+  await convert({
+    code: `\
+    function hello() {}
+    //# sourceMappingURL=data:application/json;base64,eyJzb3VyY2VzIjpbIi9zb21lL...
+    `
+  });
+  ```
+- Include inline maps with filename in `code`:
+  ```ts
+  await convert({
+    code: `\
+    function hello() {}
+    //# sourceMappingURL=some-file-on-file-system.js.map
+    `
+  });
+  ```
+- Don't use source maps at all, and pass original source code in `code`:
+  ```ts
+  await convert({
+    code: `function hello() {}`,
+    sourceMap: undefined,
+  });
+  ```
+
+## Istanbul Compatibility
+
+This project tests itself against test cases of `istanbul-lib-instrument` and verifies coverage maps are 100% identical. Some cases, like [deprecated `with()` statement](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/with) and edge cases of strict mode are skipped, as all tests are run in strict mode.
+
+100% istanbul compatibility guarantees that coverage reports between V8 and Istanbul can be merged together.
+
+<img src="https://github.com/user-attachments/assets/f74f129c-d63a-403e-8091-aefa53f6f97e" width="400" />
+
+## Limitations
+
+The way how V8 reports runtime coverage has some limitations when compared to pre-instrumented coverage:
+
+- Unable to detect uncovered `AssignmentPattern`'s if line is otherwise covered
+  - https://github.com/nodejs/node/issues/57435
+
+- Unable to detect uncovered parts when block execution stops due to function throwing:
+  - ```js
+    function first() {
+      throws()
+
+      // unreachable, but incorrectly covered
+      return "first";
+    }
+
+    const throws = ()  => { throw new Error() }
+
+    try { first(1) } catch {}
+    ```
+  - ```json
+    [
+      {
+        "ranges": [{ "startOffset": 0, "endOffset": 165, "count": 1 }],
+        "isBlockCoverage": true
+      },
+      {
+        "functionName": "first",
+        "ranges": [{ "startOffset": 0, "endOffset": 92, "count": 1 }],
+        "isBlockCoverage": true
+      },
+      {
+        "functionName": "throws",
+        "ranges": [{ "startOffset": 109, "endOffset": 137, "count": 1 }],
+        "isBlockCoverage": true
+      }
+    ]
+    ```
+
+[version-badge]: https://img.shields.io/npm/v/ast-v8-to-istanbul
+[npm-url]: https://www.npmjs.com/package/ast-v8-to-istanbul
+[downloads-url]: https://img.shields.io/npm/dm/ast-v8-to-istanbul
diff --git a/vanilla/node_modules/ast-v8-to-istanbul/dist/index.d.mts b/vanilla/node_modules/ast-v8-to-istanbul/dist/index.d.mts
new file mode 100644
index 0000000..9d69ea5
--- /dev/null
+++ b/vanilla/node_modules/ast-v8-to-istanbul/dist/index.d.mts
@@ -0,0 +1,568 @@
+import { EncodedSourceMap } from "@jridgewell/trace-mapping";
+import { CoverageMapData } from "istanbul-lib-coverage";
+import { Profiler } from "node:inspector";
+
+//#region node_modules/.pnpm/@types+estree@1.0.8/node_modules/@types/estree/index.d.ts
+// This definition file follows a somewhat unusual format. ESTree allows
+// runtime type checks based on the `type` parameter. In order to explain this
+// to typescript we want to use discriminated union types:
+// https://github.com/Microsoft/TypeScript/pull/9163
+//
+// For ESTree this is a bit tricky because the high level interfaces like
+// Node or Function are pulling double duty. We want to pass common fields down
+// to the interfaces that extend them (like Identifier or
+// ArrowFunctionExpression), but you can't extend a type union or enforce
+// common fields on them. So we've split the high level interfaces into two
+// types, a base type which passes down inherited fields, and a type union of
+// all types which extend the base type. Only the type union is exported, and
+// the union is how other types refer to the collection of inheriting types.
+//
+// This makes the definitions file here somewhat more difficult to maintain,
+// but it has the notable advantage of making ESTree much easier to use as
+// an end user.
+interface BaseNodeWithoutComments {
+  // Every leaf interface that extends BaseNode must specify a type property.
+  // The type property should be a string literal. For example, Identifier
+  // has: `type: "Identifier"`
+  type: string;
+  loc?: SourceLocation | null | undefined;
+  range?: [number, number] | undefined;
+}
+interface BaseNode extends BaseNodeWithoutComments {
+  leadingComments?: Comment[] | undefined;
+  trailingComments?: Comment[] | undefined;
+}
+interface NodeMap {
+  AssignmentProperty: AssignmentProperty;
+  CatchClause: CatchClause;
+  Class: Class;
+  ClassBody: ClassBody;
+  Expression: Expression;
+  Function: Function;
+  Identifier: Identifier;
+  Literal: Literal;
+  MethodDefinition: MethodDefinition;
+  ModuleDeclaration: ModuleDeclaration;
+  ModuleSpecifier: ModuleSpecifier;
+  Pattern: Pattern;
+  PrivateIdentifier: PrivateIdentifier;
+  Program: Program;
+  Property: Property;
+  PropertyDefinition: PropertyDefinition;
+  SpreadElement: SpreadElement;
+  Statement: Statement;
+  Super: Super;
+  SwitchCase: SwitchCase;
+  TemplateElement: TemplateElement;
+  VariableDeclarator: VariableDeclarator;
+}
+type Node = NodeMap[keyof NodeMap];
+interface Comment extends BaseNodeWithoutComments {
+  type: "Line" | "Block";
+  value: string;
+}
+interface SourceLocation {
+  source?: string | null | undefined;
+  start: Position;
+  end: Position;
+}
+interface Position {
+  /** >= 1 */
+  line: number;
+  /** >= 0 */
+  column: number;
+}
+interface Program extends BaseNode {
+  type: "Program";
+  sourceType: "script" | "module";
+  body: Array<Directive | Statement | ModuleDeclaration>;
+  comments?: Comment[] | undefined;
+}
+interface Directive extends BaseNode {
+  type: "ExpressionStatement";
+  expression: Literal;
+  directive: string;
+}
+interface BaseFunction extends BaseNode {
+  params: Pattern[];
+  generator?: boolean | undefined;
+  async?: boolean | undefined; // The body is either BlockStatement or Expression because arrow functions
+  // can have a body that's either. FunctionDeclarations and
+  // FunctionExpressions have only BlockStatement bodies.
+  body: BlockStatement | Expression;
+}
+type Function = FunctionDeclaration | FunctionExpression | ArrowFunctionExpression;
+type Statement = ExpressionStatement | BlockStatement | StaticBlock | EmptyStatement | DebuggerStatement | WithStatement | ReturnStatement | LabeledStatement | BreakStatement | ContinueStatement | IfStatement | SwitchStatement | ThrowStatement | TryStatement | WhileStatement | DoWhileStatement | ForStatement | ForInStatement | ForOfStatement | Declaration;
+interface BaseStatement extends BaseNode {}
+interface EmptyStatement extends BaseStatement {
+  type: "EmptyStatement";
+}
+interface BlockStatement extends BaseStatement {
+  type: "BlockStatement";
+  body: Statement[];
+  innerComments?: Comment[] | undefined;
+}
+interface StaticBlock extends Omit<BlockStatement, "type"> {
+  type: "StaticBlock";
+}
+interface ExpressionStatement extends BaseStatement {
+  type: "ExpressionStatement";
+  expression: Expression;
+}
+interface IfStatement extends BaseStatement {
+  type: "IfStatement";
+  test: Expression;
+  consequent: Statement;
+  alternate?: Statement | null | undefined;
+}
+interface LabeledStatement extends BaseStatement {
+  type: "LabeledStatement";
+  label: Identifier;
+  body: Statement;
+}
+interface BreakStatement extends BaseStatement {
+  type: "BreakStatement";
+  label?: Identifier | null | undefined;
+}
+interface ContinueStatement extends BaseStatement {
+  type: "ContinueStatement";
+  label?: Identifier | null | undefined;
+}
+interface WithStatement extends BaseStatement {
+  type: "WithStatement";
+  object: Expression;
+  body: Statement;
+}
+interface SwitchStatement extends BaseStatement {
+  type: "SwitchStatement";
+  discriminant: Expression;
+  cases: SwitchCase[];
+}
+interface ReturnStatement extends BaseStatement {
+  type: "ReturnStatement";
+  argument?: Expression | null | undefined;
+}
+interface ThrowStatement extends BaseStatement {
+  type: "ThrowStatement";
+  argument: Expression;
+}
+interface TryStatement extends BaseStatement {
+  type: "TryStatement";
+  block: BlockStatement;
+  handler?: CatchClause | null | undefined;
+  finalizer?: BlockStatement | null | undefined;
+}
+interface WhileStatement extends BaseStatement {
+  type: "WhileStatement";
+  test: Expression;
+  body: Statement;
+}
+interface DoWhileStatement extends BaseStatement {
+  type: "DoWhileStatement";
+  body: Statement;
+  test: Expression;
+}
+interface ForStatement extends BaseStatement {
+  type: "ForStatement";
+  init?: VariableDeclaration | Expression | null | undefined;
+  test?: Expression | null | undefined;
+  update?: Expression | null | undefined;
+  body: Statement;
+}
+interface BaseForXStatement extends BaseStatement {
+  left: VariableDeclaration | Pattern;
+  right: Expression;
+  body: Statement;
+}
+interface ForInStatement extends BaseForXStatement {
+  type: "ForInStatement";
+}
+interface DebuggerStatement extends BaseStatement {
+  type: "DebuggerStatement";
+}
+type Declaration = FunctionDeclaration | VariableDeclaration | ClassDeclaration;
+interface BaseDeclaration extends BaseStatement {}
+interface MaybeNamedFunctionDeclaration extends BaseFunction, BaseDeclaration {
+  type: "FunctionDeclaration";
+  /** It is null when a function declaration is a part of the `export default function` statement */
+  id: Identifier | null;
+  body: BlockStatement;
+}
+interface FunctionDeclaration extends MaybeNamedFunctionDeclaration {
+  id: Identifier;
+}
+interface VariableDeclaration extends BaseDeclaration {
+  type: "VariableDeclaration";
+  declarations: VariableDeclarator[];
+  kind: "var" | "let" | "const" | "using" | "await using";
+}
+interface VariableDeclarator extends BaseNode {
+  type: "VariableDeclarator";
+  id: Pattern;
+  init?: Expression | null | undefined;
+}
+interface ExpressionMap {
+  ArrayExpression: ArrayExpression;
+  ArrowFunctionExpression: ArrowFunctionExpression;
+  AssignmentExpression: AssignmentExpression;
+  AwaitExpression: AwaitExpression;
+  BinaryExpression: BinaryExpression;
+  CallExpression: CallExpression;
+  ChainExpression: ChainExpression;
+  ClassExpression: ClassExpression;
+  ConditionalExpression: ConditionalExpression;
+  FunctionExpression: FunctionExpression;
+  Identifier: Identifier;
+  ImportExpression: ImportExpression;
+  Literal: Literal;
+  LogicalExpression: LogicalExpression;
+  MemberExpression: MemberExpression;
+  MetaProperty: MetaProperty;
+  NewExpression: NewExpression;
+  ObjectExpression: ObjectExpression;
+  SequenceExpression: SequenceExpression;
+  TaggedTemplateExpression: TaggedTemplateExpression;
+  TemplateLiteral: TemplateLiteral;
+  ThisExpression: ThisExpression;
+  UnaryExpression: UnaryExpression;
+  UpdateExpression: UpdateExpression;
+  YieldExpression: YieldExpression;
+}
+type Expression = ExpressionMap[keyof ExpressionMap];
+interface BaseExpression extends BaseNode {}
+type ChainElement = SimpleCallExpression | MemberExpression;
+interface ChainExpression extends BaseExpression {
+  type: "ChainExpression";
+  expression: ChainElement;
+}
+interface ThisExpression extends BaseExpression {
+  type: "ThisExpression";
+}
+interface ArrayExpression extends BaseExpression {
+  type: "ArrayExpression";
+  elements: Array<Expression | SpreadElement | null>;
+}
+interface ObjectExpression extends BaseExpression {
+  type: "ObjectExpression";
+  properties: Array<Property | SpreadElement>;
+}
+interface PrivateIdentifier extends BaseNode {
+  type: "PrivateIdentifier";
+  name: string;
+}
+interface Property extends BaseNode {
+  type: "Property";
+  key: Expression | PrivateIdentifier;
+  value: Expression | Pattern; // Could be an AssignmentProperty
+  kind: "init" | "get" | "set";
+  method: boolean;
+  shorthand: boolean;
+  computed: boolean;
+}
+interface PropertyDefinition extends BaseNode {
+  type: "PropertyDefinition";
+  key: Expression | PrivateIdentifier;
+  value?: Expression | null | undefined;
+  computed: boolean;
+  static: boolean;
+}
+interface FunctionExpression extends BaseFunction, BaseExpression {
+  id?: Identifier | null | undefined;
+  type: "FunctionExpression";
+  body: BlockStatement;
+}
+interface SequenceExpression extends BaseExpression {
+  type: "SequenceExpression";
+  expressions: Expression[];
+}
+interface UnaryExpression extends BaseExpression {
+  type: "UnaryExpression";
+  operator: UnaryOperator;
+  prefix: true;
+  argument: Expression;
+}
+interface BinaryExpression extends BaseExpression {
+  type: "BinaryExpression";
+  operator: BinaryOperator;
+  left: Expression | PrivateIdentifier;
+  right: Expression;
+}
+interface AssignmentExpression extends BaseExpression {
+  type: "AssignmentExpression";
+  operator: AssignmentOperator;
+  left: Pattern | MemberExpression;
+  right: Expression;
+}
+interface UpdateExpression extends BaseExpression {
+  type: "UpdateExpression";
+  operator: UpdateOperator;
+  argument: Expression;
+  prefix: boolean;
+}
+interface LogicalExpression extends BaseExpression {
+  type: "LogicalExpression";
+  operator: LogicalOperator;
+  left: Expression;
+  right: Expression;
+}
+interface ConditionalExpression extends BaseExpression {
+  type: "ConditionalExpression";
+  test: Expression;
+  alternate: Expression;
+  consequent: Expression;
+}
+interface BaseCallExpression extends BaseExpression {
+  callee: Expression | Super;
+  arguments: Array<Expression | SpreadElement>;
+}
+type CallExpression = SimpleCallExpression | NewExpression;
+interface SimpleCallExpression extends BaseCallExpression {
+  type: "CallExpression";
+  optional: boolean;
+}
+interface NewExpression extends BaseCallExpression {
+  type: "NewExpression";
+}
+interface MemberExpression extends BaseExpression, BasePattern {
+  type: "MemberExpression";
+  object: Expression | Super;
+  property: Expression | PrivateIdentifier;
+  computed: boolean;
+  optional: boolean;
+}
+type Pattern = Identifier | ObjectPattern | ArrayPattern | RestElement | AssignmentPattern | MemberExpression;
+interface BasePattern extends BaseNode {}
+interface SwitchCase extends BaseNode {
+  type: "SwitchCase";
+  test?: Expression | null | undefined;
+  consequent: Statement[];
+}
+interface CatchClause extends BaseNode {
+  type: "CatchClause";
+  param: Pattern | null;
+  body: BlockStatement;
+}
+interface Identifier extends BaseNode, BaseExpression, BasePattern {
+  type: "Identifier";
+  name: string;
+}
+type Literal = SimpleLiteral | RegExpLiteral | BigIntLiteral;
+interface SimpleLiteral extends BaseNode, BaseExpression {
+  type: "Literal";
+  value: string | boolean | number | null;
+  raw?: string | undefined;
+}
+interface RegExpLiteral extends BaseNode, BaseExpression {
+  type: "Literal";
+  value?: RegExp | null | undefined;
+  regex: {
+    pattern: string;
+    flags: string;
+  };
+  raw?: string | undefined;
+}
+interface BigIntLiteral extends BaseNode, BaseExpression {
+  type: "Literal";
+  value?: bigint | null | undefined;
+  bigint: string;
+  raw?: string | undefined;
+}
+type UnaryOperator = "-" | "+" | "!" | "~" | "typeof" | "void" | "delete";
+type BinaryOperator = "==" | "!=" | "===" | "!==" | "<" | "<=" | ">" | ">=" | "<<" | ">>" | ">>>" | "+" | "-" | "*" | "/" | "%" | "**" | "|" | "^" | "&" | "in" | "instanceof";
+type LogicalOperator = "||" | "&&" | "??";
+type AssignmentOperator = "=" | "+=" | "-=" | "*=" | "/=" | "%=" | "**=" | "<<=" | ">>=" | ">>>=" | "|=" | "^=" | "&=" | "||=" | "&&=" | "??=";
+type UpdateOperator = "++" | "--";
+interface ForOfStatement extends BaseForXStatement {
+  type: "ForOfStatement";
+  await: boolean;
+}
+interface Super extends BaseNode {
+  type: "Super";
+}
+interface SpreadElement extends BaseNode {
+  type: "SpreadElement";
+  argument: Expression;
+}
+interface ArrowFunctionExpression extends BaseExpression, BaseFunction {
+  type: "ArrowFunctionExpression";
+  expression: boolean;
+  body: BlockStatement | Expression;
+}
+interface YieldExpression extends BaseExpression {
+  type: "YieldExpression";
+  argument?: Expression | null | undefined;
+  delegate: boolean;
+}
+interface TemplateLiteral extends BaseExpression {
+  type: "TemplateLiteral";
+  quasis: TemplateElement[];
+  expressions: Expression[];
+}
+interface TaggedTemplateExpression extends BaseExpression {
+  type: "TaggedTemplateExpression";
+  tag: Expression;
+  quasi: TemplateLiteral;
+}
+interface TemplateElement extends BaseNode {
+  type: "TemplateElement";
+  tail: boolean;
+  value: {
+    /** It is null when the template literal is tagged and the text has an invalid escape (e.g. - tag`\unicode and \u{55}`) */cooked?: string | null | undefined;
+    raw: string;
+  };
+}
+interface AssignmentProperty extends Property {
+  value: Pattern;
+  kind: "init";
+  method: boolean; // false
+}
+interface ObjectPattern extends BasePattern {
+  type: "ObjectPattern";
+  properties: Array<AssignmentProperty | RestElement>;
+}
+interface ArrayPattern extends BasePattern {
+  type: "ArrayPattern";
+  elements: Array<Pattern | null>;
+}
+interface RestElement extends BasePattern {
+  type: "RestElement";
+  argument: Pattern;
+}
+interface AssignmentPattern extends BasePattern {
+  type: "AssignmentPattern";
+  left: Pattern;
+  right: Expression;
+}
+type Class = ClassDeclaration | ClassExpression;
+interface BaseClass extends BaseNode {
+  superClass?: Expression | null | undefined;
+  body: ClassBody;
+}
+interface ClassBody extends BaseNode {
+  type: "ClassBody";
+  body: Array<MethodDefinition | PropertyDefinition | StaticBlock>;
+}
+interface MethodDefinition extends BaseNode {
+  type: "MethodDefinition";
+  key: Expression | PrivateIdentifier;
+  value: FunctionExpression;
+  kind: "constructor" | "method" | "get" | "set";
+  computed: boolean;
+  static: boolean;
+}
+interface MaybeNamedClassDeclaration extends BaseClass, BaseDeclaration {
+  type: "ClassDeclaration";
+  /** It is null when a class declaration is a part of the `export default class` statement */
+  id: Identifier | null;
+}
+interface ClassDeclaration extends MaybeNamedClassDeclaration {
+  id: Identifier;
+}
+interface ClassExpression extends BaseClass, BaseExpression {
+  type: "ClassExpression";
+  id?: Identifier | null | undefined;
+}
+interface MetaProperty extends BaseExpression {
+  type: "MetaProperty";
+  meta: Identifier;
+  property: Identifier;
+}
+type ModuleDeclaration = ImportDeclaration | ExportNamedDeclaration | ExportDefaultDeclaration | ExportAllDeclaration;
+interface BaseModuleDeclaration extends BaseNode {}
+type ModuleSpecifier = ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier | ExportSpecifier;
+interface BaseModuleSpecifier extends BaseNode {
+  local: Identifier;
+}
+interface ImportDeclaration extends BaseModuleDeclaration {
+  type: "ImportDeclaration";
+  specifiers: Array<ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier>;
+  attributes: ImportAttribute[];
+  source: Literal;
+}
+interface ImportSpecifier extends BaseModuleSpecifier {
+  type: "ImportSpecifier";
+  imported: Identifier | Literal;
+}
+interface ImportAttribute extends BaseNode {
+  type: "ImportAttribute";
+  key: Identifier | Literal;
+  value: Literal;
+}
+interface ImportExpression extends BaseExpression {
+  type: "ImportExpression";
+  source: Expression;
+  options?: Expression | null | undefined;
+}
+interface ImportDefaultSpecifier extends BaseModuleSpecifier {
+  type: "ImportDefaultSpecifier";
+}
+interface ImportNamespaceSpecifier extends BaseModuleSpecifier {
+  type: "ImportNamespaceSpecifier";
+}
+interface ExportNamedDeclaration extends BaseModuleDeclaration {
+  type: "ExportNamedDeclaration";
+  declaration?: Declaration | null | undefined;
+  specifiers: ExportSpecifier[];
+  attributes: ImportAttribute[];
+  source?: Literal | null | undefined;
+}
+interface ExportSpecifier extends Omit<BaseModuleSpecifier, "local"> {
+  type: "ExportSpecifier";
+  local: Identifier | Literal;
+  exported: Identifier | Literal;
+}
+interface ExportDefaultDeclaration extends BaseModuleDeclaration {
+  type: "ExportDefaultDeclaration";
+  declaration: MaybeNamedFunctionDeclaration | MaybeNamedClassDeclaration | Expression;
+}
+interface ExportAllDeclaration extends BaseModuleDeclaration {
+  type: "ExportAllDeclaration";
+  exported: Identifier | Literal | null;
+  attributes: ImportAttribute[];
+  source: Literal;
+}
+interface AwaitExpression extends BaseExpression {
+  type: "AwaitExpression";
+  argument: Expression;
+}
+//#endregion
+//#region src/types.d.ts
+interface Options<T = Node, Program = T & {
+  type: "Program";
+}> {
+  /** Code of the executed runtime file, not the original source file */
+  code: string;
+  /** Length of the execution wrapper, e.g. wrapper used in node:vm */
+  wrapperLength?: number;
+  /** Source map for the current file */
+  sourceMap?: Omit<EncodedSourceMap, "version"> & {
+    version: number;
+  };
+  /** ScriptCoverage for the current file */
+  coverage: Pick<Profiler.ScriptCoverage, "functions" | "url">;
+  /** AST for the transpiled file that matches the coverage results */
+  ast: Program | Promise<Program>;
+  /** Class method names to ignore for coverage, identical to https://github.com/istanbuljs/nyc?tab=readme-ov-file#ignoring-methods */
+  ignoreClassMethods?: string[];
+  /** Filter to ignore code based on AST nodes */
+  ignoreNode?: (node: T, type: "function" | "statement" | "branch") => boolean | "ignore-this-and-nested-nodes" | void;
+  /**
+   * Filter to ignore code based on source code
+   * - Note that this is slower than `ignoreNode` as exclusion happens after remapping
+   */
+  ignoreSourceCode?: (code: string, type: "function" | "statement" | "branch", location: Record<"start" | "end", {
+    line: number;
+    column: number;
+  }>) => boolean | void;
+}
+//#endregion
+//#region src/index.d.ts
+/**
+ * Maps V8 `ScriptCoverage` to Istanbul's `CoverageMap`.
+ * Results are identical with `istanbul-lib-instrument`.
+ */
+declare function convert<T = Node, Program = T & {
+  type: "Program";
+}>(options: Options<T, Program>): Promise<CoverageMapData>;
+//#endregion
+export { Options, convert, convert as default };
\ No newline at end of file
diff --git a/vanilla/node_modules/ast-v8-to-istanbul/dist/index.mjs b/vanilla/node_modules/ast-v8-to-istanbul/dist/index.mjs
new file mode 100644
index 0000000..8b66bc3
--- /dev/null
+++ b/vanilla/node_modules/ast-v8-to-istanbul/dist/index.mjs
@@ -0,0 +1,848 @@
+import { asyncWalk } from "estree-walker";
+import { dirname, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import { LEAST_UPPER_BOUND, TraceMap, allGeneratedPositionsFor, originalPositionFor, sourceContentFor } from "@jridgewell/trace-mapping";
+import { readFileSync } from "node:fs";
+import { readFile } from "node:fs/promises";
+import jsTokens from "js-tokens";
+
+//#region src/ast.ts
+function getWalker() {
+	let nextIgnore = false;
+	function onIgnore(node) {
+		nextIgnore = node;
+	}
+	async function walk(ast, ignoreHints, ignoreClassMethods, visitors) {
+		return await asyncWalk(ast, {
+			async enter(node) {
+				if (nextIgnore !== false) return;
+				const hint = getIgnoreHint(node);
+				if (hint === "next") return onIgnore(node);
+				if (isSkipped(node)) onIgnore(node);
+				switch (node.type) {
+					case "FunctionDeclaration": return visitors.onFunctionDeclaration(node);
+					case "FunctionExpression":
+						if (ignoreClassMethods && node.id?.name) {
+							if (ignoreClassMethods.includes(node.id.name)) return onIgnore(node);
+						}
+						return visitors.onFunctionExpression(node);
+					case "MethodDefinition": return visitors.onMethodDefinition(node);
+					case "Property": return visitors.onProperty(node);
+					case "ArrowFunctionExpression":
+						if (node.body?.type === "ParenthesizedExpression") node.body = node.body.expression;
+						return visitors.onArrowFunctionExpression(node);
+					case "ExpressionStatement": return visitors.onExpressionStatement(node);
+					case "BreakStatement": return visitors.onBreakStatement(node);
+					case "ContinueStatement": return visitors.onContinueStatement(node);
+					case "DebuggerStatement": return visitors.onDebuggerStatement(node);
+					case "ReturnStatement": return visitors.onReturnStatement(node);
+					case "ThrowStatement": return visitors.onThrowStatement(node);
+					case "TryStatement": return visitors.onTryStatement(node);
+					case "ForStatement": return visitors.onForStatement(node);
+					case "ForInStatement": return visitors.onForInStatement(node);
+					case "ForOfStatement": return visitors.onForOfStatement(node);
+					case "WhileStatement": return visitors.onWhileStatement(node);
+					case "DoWhileStatement": return visitors.onDoWhileStatement(node);
+					case "WithStatement": return visitors.onWithStatement(node);
+					case "LabeledStatement": return visitors.onLabeledStatement(node);
+					case "VariableDeclarator": return visitors.onVariableDeclarator(node);
+					case "ClassBody": {
+						const classBody = node;
+						if (ignoreClassMethods) {
+							for (const child of classBody.body) if (child.type === "MethodDefinition" || child.type === "ClassMethod") {
+								const name = child.key.type === "Identifier" && child.key.name;
+								if (name && ignoreClassMethods.includes(name)) setSkipped(child);
+							}
+							classBody.body = classBody.body.filter((child) => !isSkipped(child));
+						}
+						return visitors.onClassBody(classBody);
+					}
+					case "IfStatement": {
+						const branches = [];
+						if (node.consequent.type !== "BlockStatement") node.consequent = {
+							type: "BlockStatement",
+							body: [node.consequent],
+							start: node.consequent.start,
+							end: node.consequent.end
+						};
+						if (node.alternate && node.alternate.type !== "BlockStatement") node.alternate = {
+							type: "BlockStatement",
+							body: [node.alternate],
+							start: node.alternate.start,
+							end: node.alternate.end
+						};
+						if (hint === "if") setSkipped(node.consequent);
+						else branches.push(node.consequent);
+						if (hint === "else" && node.alternate) setSkipped(node.alternate);
+						else if (hint !== "if" && hint !== "else") branches.push(node.alternate);
+						return visitors.onIfStatement(node, branches);
+					}
+					case "SwitchStatement": {
+						const cases = [];
+						for (const _case of node.cases) if (getIgnoreHint(_case) !== "next") cases.push(_case);
+						return visitors.onSwitchStatement(node, cases);
+					}
+					case "ConditionalExpression": {
+						const branches = [];
+						if (node.consequent.type === "ParenthesizedExpression") node.consequent = node.consequent.expression;
+						if (node.alternate.type === "ParenthesizedExpression") node.alternate = node.alternate.expression;
+						if (getIgnoreHint(node.consequent) === "next") setSkipped(node.consequent);
+						else branches.push(node.consequent);
+						if (getIgnoreHint(node.alternate) === "next") setSkipped(node.alternate);
+						else branches.push(node.alternate);
+						return visitors.onConditionalExpression(node, branches);
+					}
+					case "LogicalExpression": {
+						if (isSkipped(node)) return;
+						const branches = [];
+						function visit(child) {
+							if (child.type === "LogicalExpression") {
+								setSkipped(child);
+								if (getIgnoreHint(child) !== "next") {
+									visit(child.left);
+									return visit(child.right);
+								}
+							}
+							branches.push(child);
+						}
+						visit(node);
+						return visitors.onLogicalExpression(node, branches);
+					}
+					case "AssignmentPattern": return visitors.onAssignmentPattern(node);
+					case "ClassMethod": return visitors.onClassMethod(node);
+					case "ObjectMethod": return visitors.onObjectMethod(node);
+				}
+			},
+			async leave(node) {
+				if (node === nextIgnore) nextIgnore = false;
+			}
+		});
+		function getIgnoreHint(node) {
+			for (const hint of ignoreHints) if (hint.loc.end === node.start) return hint.type;
+			return null;
+		}
+	}
+	return {
+		walk,
+		onIgnore
+	};
+}
+const skippedNodes = /* @__PURE__ */ new WeakSet();
+function getFunctionName(node) {
+	if (node.type === "Identifier") return node.name;
+	if ("id" in node && node.id) return getFunctionName(node.id);
+}
+function setSkipped(node) {
+	skippedNodes.add(node);
+}
+function isSkipped(node) {
+	return skippedNodes.has(node);
+}
+
+//#endregion
+//#region src/coverage-map.ts
+function createCoverageMapData(filename, sourceMap) {
+	const data = {};
+	const directory = dirname(filename);
+	for (const source of sourceMap.sources) {
+		let path = filename;
+		if (source) if (source.startsWith("file://")) path = fileURLToPath(source);
+		else path = resolve(directory, source);
+		data[path] = {
+			path,
+			statementMap: {},
+			fnMap: {},
+			branchMap: {},
+			s: {},
+			f: {},
+			b: {},
+			meta: {
+				lastBranch: 0,
+				lastFunction: 0,
+				lastStatement: 0,
+				seen: {}
+			}
+		};
+	}
+	return data;
+}
+function addFunction(options) {
+	const fileCoverage = options.coverageMapData[options.filename];
+	const meta = fileCoverage.meta;
+	const key = `f:${cacheKey(options.decl)}`;
+	let index = meta.seen[key];
+	if (index == null) {
+		index = meta.lastFunction;
+		meta.lastFunction++;
+		meta.seen[key] = index;
+		fileCoverage.fnMap[index] = {
+			name: options.name || `(anonymous_${index})`,
+			decl: pickLocation(options.decl),
+			loc: pickLocation(options.loc),
+			line: options.loc.start.line
+		};
+	}
+	fileCoverage.f[index] ||= 0;
+	fileCoverage.f[index] += options.covered || 0;
+}
+function addStatement(options) {
+	const fileCoverage = options.coverageMapData[options.filename];
+	const meta = fileCoverage.meta;
+	const key = `s:${cacheKey(options.loc)}`;
+	let index = meta.seen[key];
+	if (index == null) {
+		index = meta.lastStatement;
+		meta.lastStatement++;
+		meta.seen[key] = index;
+		fileCoverage.statementMap[index] = pickLocation(options.loc);
+	}
+	fileCoverage.s[index] = options.covered || 0;
+}
+function addBranch(options) {
+	const fileCoverage = options.coverageMapData[options.filename];
+	const meta = fileCoverage.meta;
+	const key = ["b", ...options.locations.map(cacheKey)].join(":");
+	let index = meta.seen[key];
+	if (index == null) {
+		index = meta.lastBranch;
+		meta.lastBranch++;
+		meta.seen[key] = index;
+		fileCoverage.branchMap[index] = {
+			loc: pickLocation(options.loc),
+			type: options.type,
+			locations: options.locations.map((loc) => pickLocation(loc)),
+			line: options.loc.start.line
+		};
+	}
+	if (!fileCoverage.b[index]) fileCoverage.b[index] = Array(options.locations.length).fill(0);
+	options.covered?.forEach((hit, i) => {
+		fileCoverage.b[index][i] += hit;
+	});
+}
+function pickLocation(loc) {
+	return {
+		start: {
+			line: loc.start.line,
+			column: loc.start.column
+		},
+		end: {
+			line: loc.end.line,
+			column: loc.end.column
+		}
+	};
+}
+function cacheKey(loc) {
+	return `${loc.start.line}:${loc.start.column}:${loc.end.line}:${loc.end.column}`;
+}
+
+//#endregion
+//#region src/ignore-hints.ts
+const IGNORE_PATTERN = /^\s*(?:istanbul|[cv]8|node:coverage)\s+ignore\s+(if|else|next|file)(?=\W|$)/;
+const IGNORE_LINES_PATTERN = /\s*(?:istanbul|[cv]8|node:coverage)\s+ignore\s+(start|stop)(?=\W|$)/;
+const EOL_PATTERN = /\r?\n/g;
+/**
+* Parse ignore hints from **Javascript** code based on AST
+* - Most AST parsers don't emit comments in AST like Acorn does, so parse comments manually instead.
+*/
+function getIgnoreHints(code) {
+	const ignoreHints = [];
+	const tokens = jsTokens(code);
+	let current = 0;
+	let previousTokenWasIgnoreHint = false;
+	for (const token of tokens) {
+		if (previousTokenWasIgnoreHint && token.type !== "WhiteSpace" && token.type !== "LineTerminatorSequence") {
+			const previous = ignoreHints.at(-1);
+			if (previous) previous.loc.end = current;
+			previousTokenWasIgnoreHint = false;
+		}
+		if (token.type === "SingleLineComment" || token.type === "MultiLineComment") {
+			const loc = {
+				start: current,
+				end: current + token.value.length
+			};
+			const type = token.value.replace(/^\/\*\*/, "").replace(/^\/\*/, "").replace(/\*\*\/$/, "").replace(/\*\/$/, "").replace(/^\/\//, "").match(IGNORE_PATTERN)?.[1];
+			if (type === "file") return [{
+				type: "file",
+				loc: {
+					start: 0,
+					end: 0
+				}
+			}];
+			if (type === "if" || type === "else" || type === "next") {
+				ignoreHints.push({
+					type,
+					loc
+				});
+				previousTokenWasIgnoreHint = true;
+			}
+		}
+		current += token.value.length;
+	}
+	return ignoreHints;
+}
+/**
+* Parse ignore start/stop hints from **text file** based on regular expressions
+* - Does not understand what a comment is in Javascript (or JSX, Vue, Svelte)
+* - Parses source code (JS, TS, Vue, Svelte, anything) based on text search by
+*   matching for `/* <name> ignore start *\/` pattern - not by looking for real comments
+*
+* ```js
+* /* v8 ignore start *\/
+* <!-- /* v8 ignore start *\/ -->
+* <SomeFrameworkComment content="/* v8 ignore start *\/">
+* ```
+*/
+function getIgnoredLines(text) {
+	if (!text) return /* @__PURE__ */ new Set();
+	const ranges = [];
+	let lineNumber = 0;
+	for (const line of text.split(EOL_PATTERN)) {
+		lineNumber++;
+		const match = line.match(IGNORE_LINES_PATTERN);
+		if (match) {
+			if (match[1] === "stop") {
+				const previous = ranges.at(-1);
+				if (previous && previous.stop === Infinity) previous.stop = lineNumber;
+				continue;
+			}
+			ranges.push({
+				start: lineNumber,
+				stop: Infinity
+			});
+		}
+	}
+	const ignoredLines = /* @__PURE__ */ new Set();
+	for (const range of ranges) for (let line = range.start; line <= range.stop; line++) {
+		ignoredLines.add(line);
+		if (line >= lineNumber) break;
+	}
+	return ignoredLines;
+}
+
+//#endregion
+//#region src/location.ts
+const WORD_PATTERN = /(\w+|\s|[^\w\s])/g;
+const INLINE_MAP_PATTERN = /#\s*sourceMappingURL=(.*)\s*$/m;
+const BASE_64_PREFIX = "data:application/json;base64,";
+/** How often should offset calculations be cached */
+const CACHE_THRESHOLD = 250;
+var Locator = class {
+	#cache = /* @__PURE__ */ new Map();
+	#codeParts;
+	#map;
+	#directory;
+	#ignoredLines = /* @__PURE__ */ new Map();
+	constructor(code, map, directory) {
+		this.#codeParts = code.split("");
+		this.#map = map;
+		this.#directory = directory;
+	}
+	reset() {
+		this.#cache.clear();
+		this.#ignoredLines.clear();
+		this.#codeParts = [];
+	}
+	offsetToNeedle(offset) {
+		const closestThreshold = Math.floor(offset / CACHE_THRESHOLD) * CACHE_THRESHOLD;
+		const cacheHit = this.#cache.get(closestThreshold);
+		let current = cacheHit ? closestThreshold : 0;
+		let line = cacheHit?.line ?? 1;
+		let column = cacheHit?.column ?? 0;
+		for (let i = current; i <= this.#codeParts.length; i++) {
+			if (current === offset) return {
+				line,
+				column
+			};
+			if (current % CACHE_THRESHOLD === 0) this.#cache.set(current, {
+				line,
+				column
+			});
+			if (this.#codeParts[i] === "\n") {
+				line++;
+				column = 0;
+			} else column++;
+			current++;
+		}
+		return {
+			line,
+			column
+		};
+	}
+	getLoc(node) {
+		const startNeedle = this.offsetToNeedle(node.start);
+		const start = getPosition(startNeedle, this.#map);
+		if (start === null) return null;
+		const endNeedle = this.offsetToNeedle(node.end);
+		endNeedle.column -= 1;
+		let end = getPosition(endNeedle, this.#map);
+		if (end === null) {
+			for (let line = endNeedle.line; line >= startNeedle.line && end === null; line--) end = getPosition({
+				line,
+				column: Infinity
+			}, this.#map);
+			if (end === null) return null;
+		}
+		const loc = {
+			start,
+			end
+		};
+		const afterEndMappings = allGeneratedPositionsFor(this.#map, {
+			source: loc.end.filename,
+			line: loc.end.line,
+			column: loc.end.column + 1,
+			bias: LEAST_UPPER_BOUND
+		});
+		if (afterEndMappings.length === 0) loc.end.column = Infinity;
+		else for (const mapping of afterEndMappings) {
+			if (mapping.line === null) continue;
+			const original = originalPositionFor(this.#map, mapping);
+			if (original.line === loc.end.line) {
+				loc.end = {
+					...original,
+					filename: original.source
+				};
+				break;
+			}
+		}
+		const filename = loc.start.filename;
+		let ignoredLines = this.#ignoredLines.get(filename);
+		if (!ignoredLines) {
+			ignoredLines = getIgnoredLines(sourceContentFor(this.#map, filename) ?? tryReadFileSync(filename));
+			this.#ignoredLines.set(filename, ignoredLines);
+		}
+		if (ignoredLines.has(loc.start.line)) return null;
+		return loc;
+	}
+	getSourceLines(loc, filename) {
+		const index = this.#map.resolvedSources.findIndex((source) => source === filename || resolve(this.#directory, source) === filename);
+		const sourcesContent = this.#map.sourcesContent?.[index];
+		if (sourcesContent == null) return null;
+		const lines = sourcesContent.split("\n").slice(loc.start.line - 1, loc.end.line);
+		lines[0] = lines[0].slice(loc.start.column);
+		lines[lines.length - 1] = lines[lines.length - 1].slice(0, loc.end.column);
+		return lines.join("\n");
+	}
+};
+function getPosition(needle, map) {
+	let position = originalPositionFor(map, needle);
+	if (position.source == null) position = originalPositionFor(map, {
+		column: needle.column,
+		line: needle.line,
+		bias: LEAST_UPPER_BOUND
+	});
+	if (position.source == null) return null;
+	return {
+		line: position.line,
+		column: position.column,
+		filename: position.source
+	};
+}
+function createEmptySourceMap(filename, code) {
+	const mappings = [];
+	for (const [line, content] of code.split("\n").entries()) {
+		const parts = content.match(WORD_PATTERN) || [];
+		const segments = [];
+		let column = 0;
+		for (const part of parts) {
+			segments.push([
+				column,
+				0,
+				line,
+				column
+			]);
+			column += part.length;
+		}
+		mappings.push(segments);
+	}
+	return {
+		version: 3,
+		mappings,
+		file: filename,
+		sources: [filename],
+		sourcesContent: [code],
+		names: []
+	};
+}
+async function getInlineSourceMap(filename, code) {
+	const match = code.match(INLINE_MAP_PATTERN)?.[1];
+	if (!match) return null;
+	try {
+		if (match.includes(BASE_64_PREFIX)) {
+			const encoded = match.split(BASE_64_PREFIX).at(-1) || "";
+			const decoded = atob(encoded);
+			return JSON.parse(decoded);
+		}
+		const content = await readFile(resolve(dirname(filename), match), "utf-8");
+		return JSON.parse(content);
+	} catch {
+		return null;
+	}
+}
+function tryReadFileSync(filename) {
+	try {
+		return readFileSync(filename, "utf8");
+	} catch {
+		return;
+	}
+}
+
+//#endregion
+//#region src/script-coverage.ts
+function normalize(scriptCoverage) {
+	if (scriptCoverage.functions.length === 0) return [];
+	const ranges = scriptCoverage.functions.flatMap((fn) => fn.ranges.map((range) => ({
+		start: range.startOffset,
+		end: range.endOffset,
+		count: range.count,
+		area: range.endOffset - range.startOffset
+	}))).sort((a, b) => {
+		const diff = b.area - a.area;
+		if (diff !== 0) return diff;
+		return a.end - b.end;
+	});
+	let maxEnd = 0;
+	for (const r of ranges) if (r.end > maxEnd) maxEnd = r.end;
+	const hits = new Uint32Array(maxEnd + 1);
+	for (const range of ranges) hits.fill(range.count, range.start, range.end + 1);
+	const normalized = [];
+	let start = 0;
+	for (let end = 1; end <= hits.length; end++) {
+		const isLast = end === hits.length;
+		const current = isLast ? null : hits[end];
+		const previous = hits[start];
+		if (current !== previous || isLast) {
+			normalized.push({
+				start,
+				end: end - 1,
+				count: previous
+			});
+			start = end;
+		}
+	}
+	return normalized;
+}
+function getCount(offset, coverages) {
+	let low = 0;
+	let high = coverages.length - 1;
+	while (low <= high) {
+		const mid = Math.floor((low + high) / 2);
+		const coverage = coverages[mid];
+		if (coverage.start <= offset.startOffset && offset.startOffset <= coverage.end) return coverage.count;
+		else if (offset.startOffset < coverage.start) high = mid - 1;
+		else low = mid + 1;
+	}
+	return 0;
+}
+
+//#endregion
+//#region src/coverage-mapper.ts
+var CoverageMapper = class CoverageMapper {
+	constructor(locator, coverageMapData, ranges, wrapperLength, directory, onIgnoreNode, ignoreNode, ignoreSourceCode) {
+		this.locator = locator;
+		this.coverageMapData = coverageMapData;
+		this.ranges = ranges;
+		this.wrapperLength = wrapperLength;
+		this.directory = directory;
+		this.onIgnoreNode = onIgnoreNode;
+		this.ignoreNode = ignoreNode;
+		this.ignoreSourceCode = ignoreSourceCode;
+	}
+	static async create(options, onIgnoreNode) {
+		const filename = fileURLToPath(options.coverage.url);
+		const directory = dirname(filename);
+		const map = new TraceMap(options.sourceMap || await getInlineSourceMap(filename, options.code) || createEmptySourceMap(filename, options.code));
+		return new CoverageMapper(new Locator(options.code, map, directory), createCoverageMapData(filename, map), normalize(options.coverage), options.wrapperLength || 0, directory, onIgnoreNode, options.ignoreNode, options.ignoreSourceCode);
+	}
+	onFunction(node, positions) {
+		if (this.#onIgnore(node, "function")) return;
+		const loc = this.locator.getLoc(positions.loc);
+		if (loc === null) return;
+		const decl = this.locator.getLoc(positions.decl);
+		if (decl === null) return;
+		const covered = getCount({
+			startOffset: node.start + this.wrapperLength,
+			endOffset: node.end + this.wrapperLength
+		}, this.ranges);
+		if (this.ignoreSourceCode) {
+			const current = this.locator.getLoc(node) || loc;
+			const sources = this.locator.getSourceLines(current, this.#getSourceFilename(current));
+			if (sources != null && this.ignoreSourceCode(sources, "function", {
+				start: {
+					line: current.start.line,
+					column: current.start.column
+				},
+				end: {
+					line: current.end.line,
+					column: current.end.column
+				}
+			})) return;
+		}
+		addFunction({
+			coverageMapData: this.coverageMapData,
+			covered,
+			loc,
+			decl,
+			filename: this.#getSourceFilename(loc),
+			name: getFunctionName(node)
+		});
+	}
+	onStatement(node, parent) {
+		if (this.#onIgnore(parent || node, "statement")) return;
+		const loc = this.locator.getLoc(node);
+		if (loc === null) return;
+		const covered = getCount({
+			startOffset: (parent || node).start + this.wrapperLength,
+			endOffset: (parent || node).end + this.wrapperLength
+		}, this.ranges);
+		if (this.ignoreSourceCode) {
+			const current = parent && this.locator.getLoc(parent) || loc;
+			const sources = this.locator.getSourceLines(current, this.#getSourceFilename(current));
+			if (sources != null && this.ignoreSourceCode(sources, "statement", {
+				start: {
+					line: current.start.line,
+					column: current.start.column
+				},
+				end: {
+					line: current.end.line,
+					column: current.end.column
+				}
+			})) return;
+		}
+		addStatement({
+			coverageMapData: this.coverageMapData,
+			loc,
+			covered,
+			filename: this.#getSourceFilename(loc)
+		});
+	}
+	onBranch(type, node, branches) {
+		if (this.#onIgnore(node, "branch")) return;
+		const loc = this.locator.getLoc(node);
+		if (loc === null) return;
+		const locations = [];
+		const covered = [];
+		for (const branch of branches) {
+			if (!branch) {
+				locations.push({
+					start: {
+						line: void 0,
+						column: void 0
+					},
+					end: {
+						line: void 0,
+						column: void 0
+					}
+				});
+				const count = getCount({
+					startOffset: node.start + this.wrapperLength,
+					endOffset: node.end + this.wrapperLength
+				}, this.ranges);
+				const previous = covered.at(-1) || 0;
+				covered.push(count - previous);
+				continue;
+			}
+			const location = this.locator.getLoc(branch);
+			if (location !== null) locations.push(location);
+			const bias = branch.type === "BlockStatement" ? 1 : 0;
+			covered.push(getCount({
+				startOffset: branch.start + bias + this.wrapperLength,
+				endOffset: branch.end - bias + this.wrapperLength
+			}, this.ranges));
+		}
+		if (type === "if") {
+			if (locations.length > 0) locations[0] = loc;
+		}
+		if (locations.length === 0) return;
+		if (this.ignoreSourceCode) {
+			const sources = this.locator.getSourceLines(loc, this.#getSourceFilename(loc));
+			if (sources != null && this.ignoreSourceCode(sources, "branch", {
+				start: {
+					line: loc.start.line,
+					column: loc.start.column
+				},
+				end: {
+					line: loc.end.line,
+					column: loc.end.column
+				}
+			})) return;
+		}
+		addBranch({
+			coverageMapData: this.coverageMapData,
+			loc,
+			locations,
+			type,
+			covered,
+			filename: this.#getSourceFilename(loc)
+		});
+	}
+	generate() {
+		this.locator.reset();
+		return this.coverageMapData;
+	}
+	#getSourceFilename(position) {
+		const sourceFilename = position.start.filename || position.end.filename;
+		if (!sourceFilename) throw new Error(`Missing original filename for ${JSON.stringify(position, null, 2)}`);
+		if (sourceFilename.startsWith("file://")) return fileURLToPath(sourceFilename);
+		return resolve(this.directory, sourceFilename);
+	}
+	#onIgnore(node, type) {
+		if (!this.ignoreNode) return false;
+		const scope = this.ignoreNode(node, type);
+		if (scope === "ignore-this-and-nested-nodes") this.onIgnoreNode(node);
+		return scope;
+	}
+};
+
+//#endregion
+//#region src/index.ts
+/**
+* Maps V8 `ScriptCoverage` to Istanbul's `CoverageMap`.
+* Results are identical with `istanbul-lib-instrument`.
+*/
+async function convert(options) {
+	const ignoreHints = getIgnoreHints(options.code);
+	if (ignoreHints.length === 1 && ignoreHints[0].type === "file") return {};
+	const walker = getWalker();
+	const mapper = await CoverageMapper.create(options, walker.onIgnore);
+	const ast = await options.ast;
+	await walker.walk(ast, ignoreHints, options.ignoreClassMethods, {
+		onFunctionDeclaration(node) {
+			mapper.onFunction(node, {
+				loc: node.body,
+				decl: node.id || {
+					...node,
+					end: node.start + 1
+				}
+			});
+		},
+		onFunctionExpression(node) {
+			if (isCovered(node)) return;
+			mapper.onFunction(node, {
+				loc: node.body,
+				decl: node.id || {
+					...node,
+					end: node.start + 1
+				}
+			});
+		},
+		onArrowFunctionExpression(node) {
+			mapper.onFunction(node, {
+				loc: node.body,
+				decl: {
+					...node,
+					end: node.start + 1
+				}
+			});
+			if (node.body.type !== "BlockStatement") mapper.onStatement(node.body, node);
+		},
+		onMethodDefinition(node) {
+			if (node.value.type === "FunctionExpression") setCovered(node.value);
+			mapper.onFunction(node, {
+				loc: node.value.body,
+				decl: node.key
+			});
+		},
+		onProperty(node) {
+			if (node.value.type === "FunctionExpression") {
+				setCovered(node.value);
+				mapper.onFunction(node, {
+					loc: node.value.body,
+					decl: node.key
+				});
+			}
+		},
+		onClassMethod(babelNode) {
+			const node = {
+				type: "FunctionExpression",
+				start: babelNode.start,
+				end: babelNode.end,
+				body: {
+					type: "BlockStatement",
+					start: babelNode.body.start,
+					end: babelNode.body.end,
+					body: []
+				},
+				params: []
+			};
+			mapper.onFunction(node, {
+				loc: node.body,
+				decl: {
+					start: babelNode.key.start,
+					end: babelNode.key.end
+				}
+			});
+		},
+		onObjectMethod(babelNode) {
+			const node = {
+				type: "FunctionExpression",
+				start: babelNode.start,
+				end: babelNode.end,
+				body: {
+					type: "BlockStatement",
+					start: babelNode.body.start,
+					end: babelNode.body.end,
+					body: []
+				},
+				params: []
+			};
+			mapper.onFunction(node, {
+				loc: node.body,
+				decl: {
+					start: babelNode.key.start,
+					end: babelNode.key.end
+				}
+			});
+		},
+		onBreakStatement: (node) => mapper.onStatement(node),
+		onContinueStatement: (node) => mapper.onStatement(node),
+		onDebuggerStatement: (node) => mapper.onStatement(node),
+		onReturnStatement: (node) => mapper.onStatement(node),
+		onThrowStatement: (node) => mapper.onStatement(node),
+		onTryStatement: (node) => mapper.onStatement(node),
+		onForStatement: (node) => mapper.onStatement(node),
+		onForInStatement: (node) => mapper.onStatement(node),
+		onForOfStatement: (node) => mapper.onStatement(node),
+		onWhileStatement: (node) => mapper.onStatement(node),
+		onDoWhileStatement: (node) => mapper.onStatement(node),
+		onWithStatement: (node) => mapper.onStatement(node),
+		onLabeledStatement: (node) => mapper.onStatement(node),
+		onExpressionStatement(node) {
+			if (node.expression.type === "Literal" && node.expression.value === "use strict") return;
+			mapper.onStatement(node);
+		},
+		onVariableDeclarator(node) {
+			if (node.init) mapper.onStatement(node.init, node);
+		},
+		onClassBody(node) {
+			for (const child of node.body) if ((child.type === "PropertyDefinition" || child.type === "ClassProperty" || child.type === "ClassPrivateProperty") && child.value) mapper.onStatement(child.value);
+		},
+		onIfStatement(node, branches) {
+			mapper.onBranch("if", node, branches);
+			mapper.onStatement(node);
+		},
+		onConditionalExpression(node, branches) {
+			mapper.onBranch("cond-expr", node, branches);
+		},
+		onLogicalExpression(node, branches) {
+			mapper.onBranch("binary-expr", node, branches);
+		},
+		onSwitchStatement(node, cases) {
+			mapper.onBranch("switch", node, cases);
+			mapper.onStatement(node);
+		},
+		onAssignmentPattern(node) {
+			mapper.onBranch("default-arg", node, [node.right]);
+		}
+	});
+	return mapper.generate();
+}
+const coveredNodes = /* @__PURE__ */ new WeakSet();
+function setCovered(node) {
+	coveredNodes.add(node);
+}
+function isCovered(node) {
+	return coveredNodes.has(node);
+}
+
+//#endregion
+export { convert, convert as default };
\ No newline at end of file
diff --git a/vanilla/node_modules/ast-v8-to-istanbul/package.json b/vanilla/node_modules/ast-v8-to-istanbul/package.json
new file mode 100644
index 0000000..d3cae0b
--- /dev/null
+++ b/vanilla/node_modules/ast-v8-to-istanbul/package.json
@@ -0,0 +1,71 @@
+{
+  "name": "ast-v8-to-istanbul",
+  "version": "0.3.11",
+  "description": "AST-aware v8-to-istanbul",
+  "homepage": "https://github.com/AriPerkkio/ast-v8-to-istanbul",
+  "bugs": "https://github.com/AriPerkkio/ast-v8-to-istanbul",
+  "license": "MIT",
+  "author": "Ari Perkkiö <ari.perkkio@gmail.com>",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/AriPerkkio/ast-v8-to-istanbul.git"
+  },
+  "files": [
+    "dist"
+  ],
+  "type": "module",
+  "types": "./dist/index.d.mts",
+  "exports": "./dist/index.mjs",
+  "dependencies": {
+    "@jridgewell/trace-mapping": "^0.3.31",
+    "estree-walker": "^3.0.3",
+    "js-tokens": "^10.0.0"
+  },
+  "devDependencies": {
+    "@babel/parser": "^7.28.6",
+    "@babel/types": "^7.28.6",
+    "@sveltejs/vite-plugin-svelte": "^6.2.4",
+    "@types/estree": "^1.0.8",
+    "@types/istanbul-lib-coverage": "^2.0.6",
+    "@types/istanbul-lib-instrument": "^1.7.8",
+    "@types/istanbul-lib-report": "^3.0.3",
+    "@types/istanbul-lib-source-maps": "^4.0.4",
+    "@types/istanbul-reports": "^3.0.4",
+    "@types/node": "^25.0.10",
+    "@vitejs/plugin-vue": "^6.0.3",
+    "@vitest/coverage-istanbul": "^4.0.18",
+    "@vitest/coverage-v8": "^4.0.18",
+    "acorn": "^8.15.0",
+    "gh-pages": "^6.3.0",
+    "istanbul-lib-coverage": "^3.2.2",
+    "istanbul-lib-instrument": "^6.0.3",
+    "istanbul-lib-report": "^3.0.1",
+    "istanbul-lib-source-maps": "^5.0.6",
+    "istanbul-reports": "^3.2.0",
+    "magic-string": "^0.30.21",
+    "oxc-parser": "^0.110.0",
+    "oxfmt": "^0.27.0",
+    "oxlint": "^1.42.0",
+    "oxlint-tsgolint": "^0.11.2",
+    "publint": "^0.3.17",
+    "rollup": "^4.56.0",
+    "tinyrainbow": "^3.0.3",
+    "tsdown": "^0.20.1",
+    "typescript": "^5.9.3",
+    "vite": "^7.3.1",
+    "vitest": "^4.0.18",
+    "vue": "^3.5.27",
+    "yaml": "^2.8.2"
+  },
+  "scripts": {
+    "dev": "tsdown --watch --sourcemap",
+    "build": "tsdown",
+    "deploy": "touch coverage/.nojekyll && gh-pages --dist coverage --dotfiles",
+    "test": "vitest",
+    "test:dev": "vitest --project 'vite/parseAstAsync'",
+    "lint": "oxlint --type-aware && oxfmt --check && publint",
+    "typecheck": "tsc --noEmit",
+    "debug": "open fixture-coverage/index.html istanbul-coverage/index.html",
+    "verify": "pnpm build; pnpm lint; pnpm typecheck; pnpm run test --run; pnpm bench"
+  }
+}
\ No newline at end of file
-- 
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