eslint-scope 5.1.1: verify ScopeManager and analyze in eslint-scope

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify ScopeManager and analyze in eslint-scope
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/eslint-scope@5.1.1
Demonstrate these symbols/APIs:
  - ScopeManager
  - analyze

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:29d527635e59000acae398eb2a015c71938c12c420677a8e46c9b495d41283d9","contract":["analyze generates a ScopeManager with global and module scopes from ESTree AST","ScopeManager.acquire retrieves the Scope associated with an AST node","ScopeManager.getDeclaredVariables returns variables declared by an AST node","Scope tracks variable references and distinguishes read and write operations","GlobalScope.through records unresolved references to undeclared variables across nested scopes"],"goal":"verify ScopeManager and analyze in eslint-scope","kind":"HOW","packages":["pkg:npm/eslint-scope@5.1.1"],"schemaVersion":1,"symbols":["ScopeManager","analyze"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/eslint-scope@5.1.1"],"schemaVersion":1,"subject":"pkg:npm/eslint-scope@5.1.1","symbols":["ScopeManager","analyze"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-eslint-scope",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-eslint-scope",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "eslint-scope": "5.1.1"
      }
    },
    "node_modules/eslint-scope": {
      "version": "5.1.1",
      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.1.1.tgz",
      "integrity": "sha512-2NxwbF/hZ0KpepYN0cNbo+FN6XoK7GaHlQhgx/hIZl6Va0bF45RQOOwhLIy8lQDbuCiadSLCBnH2CFYquit5bw==",
      "license": "BSD-2-Clause",
      "dependencies": {
        "esrecurse": "^4.3.0",
        "estraverse": "^4.1.1"
      },
      "engines": {
        "node": ">=8.0.0"
      }
    },
    "node_modules/esrecurse": {
      "version": "4.3.0",
      "resolved": "https://registry.npmjs.org/esrecurse/-/esrecurse-4.3.0.tgz",
      "integrity": "sha512-KmfKL3b6G+RXvP8N1vr3Tq1kL/oCFgn2NYXEtqP8/L3pKapUA4G8cFVaoF3SU323CD4XypR/ffioHmkti6/Tag==",
      "license": "BSD-2-Clause",
      "dependencies": {
        "estraverse": "^5.2.0"
      },
      "engines": {
        "node": ">=4.0"
      }
    },
    "node_modules/esrecurse/node_modules/estraverse": {
      "version": "5.3.0",
      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.3.0.tgz",
      "integrity": "sha512-MMdARuVEQziNTeJD8DgMqmhwR11BRQ/cBP+pLtYdSTnf3MIO8fFeiINEbX36ZdNlfU/7A9f3gUw49B3oQsvwBA==",
      "license": "BSD-2-Clause",
      "engines": {
        "node": ">=4.0"
      }
    },
    "node_modules/estraverse": {
      "version": "4.3.0",
      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.3.0.tgz",
      "integrity": "sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==",
      "license": "BSD-2-Clause",
      "engines": {
        "node": ">=4.0"
      }
    }
  }
}

{
  "name": "sample-eslint-scope",
  "version": "1.0.0",
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "eslint-scope": "5.1.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify ScopeManager and analyze in eslint-scope",
  "kind": "HOW",
  "packages": [
    "pkg:npm/eslint-scope@5.1.1"
  ],
  "symbols": [
    "ScopeManager",
    "analyze"
  ]
}

import assert from 'node:assert/strict';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const { analyze, ScopeManager } = require('eslint-scope');

// Build an ESTree AST representing module declarations, functions, and cross-scope references
const varDeclNode = {
  type: 'VariableDeclaration',
  kind: 'const',
  range: [0, 25],
  declarations: [
    {
      type: 'VariableDeclarator',
      range: [6, 25],
      id: { type: 'Identifier', name: 'baseValue', range: [6, 15] },
      init: { type: 'Literal', value: 42, range: [18, 20] }
    }
  ]
};

const funcNode = {
  type: 'FunctionDeclaration',
  range: [27, 130],
  id: { type: 'Identifier', name: 'compute', range: [36, 43] },
  params: [
    { type: 'Identifier', name: 'factor', range: [44, 50] }
  ],
  body: {
    type: 'BlockStatement',
    range: [52, 130],
    body: [
      {
        type: 'VariableDeclaration',
        kind: 'let',
        range: [58, 80],
        declarations: [
          {
            type: 'VariableDeclarator',
            range: [62, 80],
            id: { type: 'Identifier', name: 'total', range: [62, 67] },
            init: {
              type: 'BinaryExpression',
              operator: '*',
              range: [70, 79],
              left: { type: 'Identifier', name: 'baseValue', range: [70, 79] },
              right: { type: 'Identifier', name: 'factor', range: [80, 86] }
            }
          }
        ]
      },
      {
        type: 'ExpressionStatement',
        range: [86, 110],
        expression: {
          type: 'AssignmentExpression',
          operator: '=',
          range: [86, 110],
          left: { type: 'Identifier', name: 'factor', range: [86, 92] },
          right: { type: 'Identifier', name: 'externalGlobal', range: [95, 109] }
        }
      },
      {
        type: 'ReturnStatement',
        range: [114, 128],
        argument: { type: 'Identifier', name: 'total', range: [121, 126] }
      }
    ]
  }
};

const ast = {
  type: 'Program',
  range: [0, 130],
  sourceType: 'module',
  body: [varDeclNode, funcNode]
};

const scopeManager = analyze(ast, { ecmaVersion: 2020, sourceType: 'module' });

// 1. analyze generates a ScopeManager with global and module scopes from ESTree AST
assert.ok(scopeManager instanceof ScopeManager, 'ScopeManager should be created');
assert.equal(scopeManager.scopes.length, 3);
assert.equal(scopeManager.scopes[0].type, 'global');
assert.equal(scopeManager.scopes[1].type, 'module');
assert.equal(scopeManager.scopes[2].type, 'function');

// 2. ScopeManager.acquire retrieves the Scope associated with an AST node
const moduleScope = scopeManager.scopes[1];
const functionScope = scopeManager.acquire(funcNode);
assert.ok(functionScope, 'FunctionScope should be acquired');
assert.equal(functionScope.type, 'function');
assert.equal(functionScope.block, funcNode);
assert.equal(functionScope.upper, moduleScope);

// 3. ScopeManager.getDeclaredVariables returns variables declared by an AST node
const moduleVars = scopeManager.getDeclaredVariables(varDeclNode);
assert.equal(moduleVars.length, 1);
assert.equal(moduleVars[0].name, 'baseValue');

const funcDeclaredVars = scopeManager.getDeclaredVariables(funcNode);
assert.deepEqual(funcDeclaredVars.map(v => v.name), ['compute', 'factor']);

// 4. Scope tracks variable references and distinguishes read and write operations
const baseVar = moduleScope.set.get('baseValue');
assert.ok(baseVar, 'baseValue variable should exist in module scope');
assert.equal(baseVar.references.length, 2);

const baseWrite = baseVar.references.find(r => r.isWrite());
const baseRead = baseVar.references.find(r => r.isRead());
assert.ok(baseWrite.isWriteOnly(), 'Definition reference should be write-only');
assert.ok(baseRead.isReadOnly(), 'Usage reference should be read-only');
assert.equal(baseRead.resolved, baseVar);
assert.equal(baseRead.from, functionScope);

const factorVar = functionScope.set.get('factor');
assert.ok(factorVar, 'factor variable should exist in function scope');
const factorWrite = factorVar.references.find(r => r.isWrite());
assert.ok(factorWrite, 'Assignment expression should create a write reference');
assert.equal(factorWrite.from, functionScope);

// 5. GlobalScope.through records unresolved references to undeclared variables across nested scopes
const globalScope = scopeManager.scopes[0];
assert.equal(globalScope.through.length, 1);
assert.equal(globalScope.through[0].identifier.name, 'externalGlobal');
assert.equal(globalScope.through[0].resolved, null);
assert.equal(globalScope.through[0].from, functionScope);