diff --git a/.changeset/fec-738-no-direct-currency-formatting.md b/.changeset/fec-738-no-direct-currency-formatting.md
new file mode 100644
index 0000000000..6b6d19f519
--- /dev/null
+++ b/.changeset/fec-738-no-direct-currency-formatting.md
@@ -0,0 +1,43 @@
+---
+'@commercetools-frontend/eslint-config-mc-app': minor
+---
+
+Add bundled `no-direct-currency-formatting` rule via the `@commercetools-frontend/eslint-config-mc-app/rules` inline plugin.
+
+This rule disallows direct currency formatting through `intl.formatNumber`, `intl.formatCurrency`, `new Intl.NumberFormat` when using a `currency` option or `style: 'currency'`, and `<FormattedNumber />` from `react-intl`.
+
+Use a shared currency formatting wrapper instead, and allowlist that wrapper path if needed.
+
+## How to update
+
+Enable the bundled rule in your project config:
+
+```js
+// eslint.config.js
+import mcAppConfig from '@commercetools-frontend/eslint-config-mc-app';
+
+export default [
+  ...mcAppConfig,
+  {
+    files: ['**/*.{js,jsx,ts,tsx}'],
+    rules: {
+      '@commercetools-frontend/eslint-config-mc-app/rules/no-direct-currency-formatting':
+        [
+          'error',
+          {
+            allowedWrapperPaths: [
+              'src/utils/money.js', // path to your shared wrapper implementation
+            ],
+          },
+        ],
+    },
+  },
+];
+```
+
+If you need to customize the wrapper allowlist, pass `allowedWrapperPaths` as shown above.
+
+## Why
+
+Direct currency formatting is hard to standardize across applications and can drift in behavior over time.
+Enforcing a shared wrapper keeps formatting logic consistent, testable, and centrally maintainable.
diff --git a/jest.test.config.js b/jest.test.config.js
index 110b00780e..6a8f90fcd4 100644
--- a/jest.test.config.js
+++ b/jest.test.config.js
@@ -1,29 +1,65 @@
 process.env.ENABLE_NEW_JSX_TRANSFORM = 'true';
 
 /**
- * @type {import('@jest/types').Config.ProjectConfig}
+ * This config uses Jest "projects" to run two test suites in a single
+ * `pnpm test` invocation, each with its own environment:
+ *
+ *  - "test"         — the main suite (jsdom). Uses the MC app preset which
+ *                     sets up window.app, localStorage mocks, etc.
+ *  - "eslint-rules" — custom ESLint rule tests (node). These use ESLint's
+ *                     RuleTester which requires `structuredClone` (available
+ *                     in Node but not in jsdom) and has no DOM dependencies.
+ *                     The MC app preset's setup files also assume jsdom
+ *                     (they write to `global.window`), so these tests cannot
+ *                     run under the main project.
+ *
+ * If you add more custom ESLint rules under
+ * packages/eslint-config-mc-app/rules/, their *.spec.js files will be
+ * picked up automatically by the "eslint-rules" project.
+ *
+ * @type {import('@jest/types').Config.InitialOptions}
  */
 
 module.exports = {
-  preset: '@commercetools-frontend/jest-preset-mc-app/typescript',
-  moduleDirectories: [
-    'application-templates/',
-    'custom-views-templates/',
-    'packages/',
-    'playground/',
-    'node_modules/',
+  projects: [
+    // Main application test suite — jsdom environment.
+    {
+      displayName: 'test',
+      preset: '@commercetools-frontend/jest-preset-mc-app/typescript',
+      moduleDirectories: [
+        'application-templates/',
+        'custom-views-templates/',
+        'packages/',
+        'playground/',
+        'node_modules/',
+      ],
+      modulePathIgnorePatterns: [
+        '.cache',
+        'build',
+        'dist',
+        'public/',
+        'examples',
+        'packages-backend/',
+      ],
+      testPathIgnorePatterns: [
+        '/node_modules/',
+        // Excluded here because these tests need the node environment (see below).
+        'packages/eslint-config-mc-app/rules/',
+      ],
+      transformIgnorePatterns: [
+        // Transpile also our local packages as they are only symlinked.
+        'node_modules/(?!(@commercetools-[frontend|backend]+)/)',
+      ],
+      testEnvironment: 'jsdom',
+    },
+    // Custom ESLint rule tests — node environment, no preset/setup files.
+    // `transform: {}` disables Babel so the MC app preset's babel-plugin-istanbul
+    // doesn't conflict with Jest's own coverage instrumentation.
+    {
+      displayName: 'eslint-rules',
+      testEnvironment: 'node',
+      testMatch: ['<rootDir>/packages/eslint-config-mc-app/rules/**/*.spec.js'],
+      transform: {},
+    },
   ],
-  modulePathIgnorePatterns: [
-    '.cache',
-    'build',
-    'dist',
-    'public/',
-    'examples',
-    'packages-backend/',
-  ],
-  transformIgnorePatterns: [
-    // Transpile also our local packages as they are only symlinked.
-    'node_modules/(?!(@commercetools-[frontend|backend]+)/)',
-  ],
-  testEnvironment: 'jsdom',
 };
diff --git a/packages/eslint-config-mc-app/index.js b/packages/eslint-config-mc-app/index.js
index fe18f98dba..a991ade0fc 100644
--- a/packages/eslint-config-mc-app/index.js
+++ b/packages/eslint-config-mc-app/index.js
@@ -90,6 +90,9 @@ const { statusCode, allSupportedExtensions } = require('./helpers/eslint');
 const hasJsxRuntime = require('./helpers/has-jsx-runtime');
 const { craRules } = require('./helpers/rules-presets');
 
+// Bundled custom rules
+const noDirectCurrencyFormattingRule = require('./rules/no-direct-currency-formatting');
+
 /**
  * ESLint flat config format for @commercetools-frontend/eslint-config-mc-app
  * @type {import("eslint").Linter.FlatConfig[]}
@@ -124,6 +127,11 @@ module.exports = [
       'jsx-a11y': jsxA11yPlugin,
       prettier: prettierPlugin,
       cypress: cypressPlugin,
+      '@commercetools-frontend/eslint-config-mc-app/rules': {
+        rules: {
+          'no-direct-currency-formatting': noDirectCurrencyFormattingRule,
+        },
+      },
     },
     settings: {
       'import/resolver': {
diff --git a/packages/eslint-config-mc-app/rules/no-direct-currency-formatting.js b/packages/eslint-config-mc-app/rules/no-direct-currency-formatting.js
new file mode 100644
index 0000000000..0bffbe9eba
--- /dev/null
+++ b/packages/eslint-config-mc-app/rules/no-direct-currency-formatting.js
@@ -0,0 +1,413 @@
+const path = require('path');
+
+const unwrapExpression = (node) => {
+  if (!node) return node;
+
+  if (node.type === 'TSAsExpression' || node.type === 'TypeCastExpression') {
+    return unwrapExpression(node.expression);
+  }
+
+  return node;
+};
+
+const isStringLiteralCurrency = (node) =>
+  node &&
+  node.type === 'Literal' &&
+  typeof node.value === 'string' &&
+  node.value === 'currency';
+
+const getPropertyKeyName = (propertyNode) => {
+  if (!propertyNode || propertyNode.type !== 'Property') return undefined;
+
+  if (!propertyNode.computed && propertyNode.key.type === 'Identifier')
+    return propertyNode.key.name;
+  if (propertyNode.key.type === 'Literal') return propertyNode.key.value;
+
+  return undefined;
+};
+
+const findVariableByName = (scope, name) => {
+  let currentScope = scope;
+
+  while (currentScope) {
+    const variable = currentScope.variables.find(
+      (entry) => entry.name === name
+    );
+    if (variable) return variable;
+    currentScope = currentScope.upper;
+  }
+
+  return undefined;
+};
+
+const resolveNodeFromIdentifier = (
+  node,
+  scope,
+  seenIdentifiers = new Set()
+) => {
+  const unwrappedNode = unwrapExpression(node);
+  if (!unwrappedNode || unwrappedNode.type !== 'Identifier')
+    return unwrappedNode;
+
+  if (seenIdentifiers.has(unwrappedNode.name)) return unwrappedNode;
+  seenIdentifiers.add(unwrappedNode.name);
+
+  const variable = findVariableByName(scope, unwrappedNode.name);
+  if (!variable || variable.defs.length === 0) return unwrappedNode;
+
+  const definitionNode = variable.defs[0].node;
+  if (
+    definitionNode &&
+    definitionNode.type === 'VariableDeclarator' &&
+    definitionNode.init
+  ) {
+    return resolveNodeFromIdentifier(
+      definitionNode.init,
+      scope,
+      seenIdentifiers
+    );
+  }
+
+  return unwrappedNode;
+};
+
+// Detects any `currency` property in an options object, static or dynamic.
+// Intl.NumberFormat validates the `currency` option regardless of `style`, so
+// any direct usage — even with a hardcoded value — must go through the wrapper.
+const hasCurrencyOption = (node, scope, seenObjectNodes = new Set()) => {
+  const resolvedNode = resolveNodeFromIdentifier(node, scope);
+  if (!resolvedNode || resolvedNode.type !== 'ObjectExpression') return false;
+
+  if (seenObjectNodes.has(resolvedNode)) return false;
+  seenObjectNodes.add(resolvedNode);
+
+  return resolvedNode.properties.some((propertyNode) => {
+    if (propertyNode.type === 'SpreadElement') {
+      return hasCurrencyOption(propertyNode.argument, scope, seenObjectNodes);
+    }
+
+    return getPropertyKeyName(propertyNode) === 'currency';
+  });
+};
+
+// Detects options that resolve to `style: 'currency'`, even via identifiers/spreads.
+const isCurrencyStyleOption = (node, scope, seenObjectNodes = new Set()) => {
+  const resolvedNode = resolveNodeFromIdentifier(node, scope);
+  if (!resolvedNode || resolvedNode.type !== 'ObjectExpression') return false;
+
+  if (seenObjectNodes.has(resolvedNode)) return false;
+  seenObjectNodes.add(resolvedNode);
+
+  return resolvedNode.properties.some((propertyNode) => {
+    if (propertyNode.type === 'SpreadElement') {
+      return isCurrencyStyleOption(
+        propertyNode.argument,
+        scope,
+        seenObjectNodes
+      );
+    }
+
+    if (getPropertyKeyName(propertyNode) !== 'style') {
+      return false;
+    }
+
+    const resolvedStyleValue = resolveNodeFromIdentifier(
+      propertyNode.value,
+      scope
+    );
+    return isStringLiteralCurrency(unwrapExpression(resolvedStyleValue));
+  });
+};
+
+const getJsxAttributeName = (attributeNode) => {
+  if (
+    !attributeNode ||
+    attributeNode.type !== 'JSXAttribute' ||
+    !attributeNode.name ||
+    attributeNode.name.type !== 'JSXIdentifier'
+  ) {
+    return undefined;
+  }
+
+  return attributeNode.name.name;
+};
+
+const getJsxAttributeValueNode = (attributeNode) => {
+  if (!attributeNode || attributeNode.type !== 'JSXAttribute') return undefined;
+  if (!attributeNode.value) return undefined;
+
+  if (attributeNode.value.type === 'Literal') return attributeNode.value;
+  if (attributeNode.value.type !== 'JSXExpressionContainer') return undefined;
+
+  return unwrapExpression(attributeNode.value.expression);
+};
+
+const isCurrencyFormattedNumberElement = (node, scope) => {
+  if (!node || !node.attributes) return false;
+
+  return node.attributes.some((attributeNode) => {
+    if (attributeNode.type === 'JSXSpreadAttribute') {
+      return isCurrencyStyleOption(attributeNode.argument, scope);
+    }
+
+    if (getJsxAttributeName(attributeNode) !== 'style') return false;
+    const resolvedAttributeValue = resolveNodeFromIdentifier(
+      getJsxAttributeValueNode(attributeNode),
+      scope
+    );
+
+    return isStringLiteralCurrency(unwrapExpression(resolvedAttributeValue));
+  });
+};
+
+// Rule allowlist for wrapper files that are expected to format currencies directly.
+const isPathAllowed = (filename, allowedWrapperPaths) => {
+  const normalizePathSeparators = (value) => value.replace(/\\/g, '/');
+  const normalizedFilename = normalizePathSeparators(
+    filename.split(path.sep).join('/')
+  );
+
+  return allowedWrapperPaths.some((allowedPath) => {
+    const normalizedAllowedPath = normalizePathSeparators(
+      allowedPath.split(path.sep).join('/')
+    );
+    return normalizedFilename.endsWith(normalizedAllowedPath);
+  });
+};
+
+/** ESLint 9+: use SourceCode#getScope(node); legacy context.getScope() was removed. */
+function getScopeForNode(context, node) {
+  const sourceCode = context.sourceCode ?? context.getSourceCode();
+  return sourceCode.getScope(node);
+}
+
+/**
+ * @type {import('eslint').Rule.RuleModule}
+ */
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description:
+        'Disallow direct currency formatting and enforce shared wrapper usage.',
+      category: 'Best Practices',
+      recommended: false,
+    },
+    schema: [
+      {
+        type: 'object',
+        properties: {
+          allowedWrapperPaths: {
+            type: 'array',
+            items: {
+              type: 'string',
+            },
+            default: [],
+          },
+        },
+        additionalProperties: false,
+      },
+    ],
+    messages: {
+      noDirectCurrencyFormatting:
+        'Use the shared currency formatting wrapper instead of direct currency formatting.',
+    },
+  },
+  create: function (context) {
+    const options = context.options[0] || {};
+    const allowedWrapperPaths = options.allowedWrapperPaths || [];
+    const filename = context.getFilename();
+
+    // Skip checks for explicitly allowed wrapper implementations.
+    if (isPathAllowed(filename, allowedWrapperPaths)) return {};
+
+    // Track local names of formatting functions from destructuring or aliasing.
+    // Covers: const { formatNumber } = useIntl()
+    //         const { formatCurrency } = intl
+    //         function Foo({ formatNumber }) { ... }
+    //         const fmt = intl.formatNumber
+    const destructuredFormattingFunctionNames = new Set();
+    const formattingFunctionNames = new Set(['formatNumber', 'formatCurrency']);
+    const formattedNumberComponentNames = new Set();
+    const reactIntlNamespaceImports = new Set();
+
+    const collectFormatNumberFromObjectPattern = (objectPatternNode) => {
+      if (!objectPatternNode || objectPatternNode.type !== 'ObjectPattern')
+        return;
+
+      objectPatternNode.properties.forEach((prop) => {
+        if (prop.type !== 'Property') return;
+        const propertyKeyName = getPropertyKeyName(prop);
+        if (!formattingFunctionNames.has(propertyKeyName)) return;
+        if (prop.value.type !== 'Identifier') return;
+        destructuredFormattingFunctionNames.add(prop.value.name);
+      });
+    };
+
+    const isFormatNumberMemberExpression = (node) => {
+      if (!node || node.type !== 'MemberExpression') return false;
+
+      if (!node.computed)
+        return (
+          node.property.type === 'Identifier' &&
+          formattingFunctionNames.has(node.property.name)
+        );
+
+      return (
+        node.property.type === 'Literal' &&
+        formattingFunctionNames.has(node.property.value)
+      );
+    };
+
+    return {
+      ImportDeclaration(node) {
+        if (!node.source || node.source.value !== 'react-intl') return;
+
+        node.specifiers.forEach((specifier) => {
+          if (specifier.type === 'ImportSpecifier') {
+            if (
+              specifier.imported &&
+              specifier.imported.type === 'Identifier' &&
+              specifier.imported.name === 'FormattedNumber'
+            ) {
+              formattedNumberComponentNames.add(specifier.local.name);
+            }
+          }
+
+          if (
+            specifier.type === 'ImportNamespaceSpecifier' &&
+            specifier.local &&
+            specifier.local.type === 'Identifier'
+          ) {
+            reactIntlNamespaceImports.add(specifier.local.name);
+          }
+        });
+      },
+
+      // function Foo({ formatNumber }) { ... }
+      FunctionDeclaration(node) {
+        node.params.forEach(collectFormatNumberFromObjectPattern);
+      },
+      FunctionExpression(node) {
+        node.params.forEach(collectFormatNumberFromObjectPattern);
+      },
+      ArrowFunctionExpression(node) {
+        node.params.forEach(collectFormatNumberFromObjectPattern);
+      },
+
+      // const { formatNumber } = useIntl() / const { formatNumber } = intl
+      // const fmt = intl.formatNumber
+      VariableDeclarator(node) {
+        if (node.id && node.id.type === 'ObjectPattern' && node.init) {
+          collectFormatNumberFromObjectPattern(node.id);
+        }
+
+        // const { FormattedNumber } = require('react-intl')
+        if (
+          node.id &&
+          node.id.type === 'ObjectPattern' &&
+          node.init &&
+          node.init.type === 'CallExpression' &&
+          node.init.callee.type === 'Identifier' &&
+          node.init.callee.name === 'require' &&
+          node.init.arguments &&
+          node.init.arguments[0] &&
+          node.init.arguments[0].type === 'Literal' &&
+          node.init.arguments[0].value === 'react-intl'
+        ) {
+          node.id.properties.forEach((propertyNode) => {
+            if (propertyNode.type !== 'Property') return;
+            if (getPropertyKeyName(propertyNode) !== 'FormattedNumber') return;
+            if (propertyNode.value.type !== 'Identifier') return;
+            formattedNumberComponentNames.add(propertyNode.value.name);
+          });
+        }
+
+        if (
+          node.id &&
+          node.id.type === 'Identifier' &&
+          isFormatNumberMemberExpression(unwrapExpression(node.init))
+        ) {
+          destructuredFormattingFunctionNames.add(node.id.name);
+        }
+      },
+
+      JSXOpeningElement(node) {
+        if (!node.name) return;
+        const scope = getScopeForNode(context, node);
+
+        // <FormattedNumber .../> with named or aliased import.
+        if (
+          node.name.type === 'JSXIdentifier' &&
+          formattedNumberComponentNames.has(node.name.name) &&
+          isCurrencyFormattedNumberElement(node, scope)
+        ) {
+          context.report({ node, messageId: 'noDirectCurrencyFormatting' });
+          return;
+        }
+
+        // <ReactIntl.FormattedNumber .../> with namespace import.
+        if (
+          node.name.type === 'JSXMemberExpression' &&
+          node.name.object &&
+          node.name.object.type === 'JSXIdentifier' &&
+          reactIntlNamespaceImports.has(node.name.object.name) &&
+          node.name.property &&
+          node.name.property.type === 'JSXIdentifier' &&
+          node.name.property.name === 'FormattedNumber' &&
+          isCurrencyFormattedNumberElement(node, scope)
+        ) {
+          context.report({ node, messageId: 'noDirectCurrencyFormatting' });
+        }
+      },
+
+      CallExpression(node) {
+        const scope = getScopeForNode(context, node);
+
+        const isCurrencyFormattingArg = (arg) =>
+          isCurrencyStyleOption(arg, scope) || hasCurrencyOption(arg, scope);
+        const hasCurrencyFormattingArgs =
+          isCurrencyFormattingArg(node.arguments[1]) ||
+          isCurrencyFormattingArg(node.arguments[0]);
+
+        // Disallow member-expression calls: intl.formatNumber(..., { style: 'currency' })
+        // or intl.formatNumber(..., { currency: dynamicCode })
+        if (
+          node.callee.type === 'MemberExpression' &&
+          isFormatNumberMemberExpression(node.callee) &&
+          hasCurrencyFormattingArgs
+        ) {
+          context.report({ node, messageId: 'noDirectCurrencyFormatting' });
+          return;
+        }
+
+        // Disallow destructured calls: const { formatNumber } = useIntl(); formatNumber(...)
+        if (
+          node.callee.type === 'Identifier' &&
+          destructuredFormattingFunctionNames.has(node.callee.name) &&
+          hasCurrencyFormattingArgs
+        ) {
+          context.report({ node, messageId: 'noDirectCurrencyFormatting' });
+        }
+      },
+
+      NewExpression(node) {
+        const scope = getScopeForNode(context, node);
+        // Disallow direct native Intl currency formatting constructors,
+        // with style:'currency' or a dynamic currency option.
+        if (
+          node.callee.type === 'MemberExpression' &&
+          !node.callee.computed &&
+          node.callee.object.type === 'Identifier' &&
+          node.callee.object.name === 'Intl' &&
+          node.callee.property.type === 'Identifier' &&
+          node.callee.property.name === 'NumberFormat' &&
+          (isCurrencyStyleOption(node.arguments[1], scope) ||
+            hasCurrencyOption(node.arguments[1], scope))
+        ) {
+          context.report({ node, messageId: 'noDirectCurrencyFormatting' });
+        }
+      },
+    };
+  },
+};
diff --git a/packages/eslint-config-mc-app/rules/no-direct-currency-formatting.spec.js b/packages/eslint-config-mc-app/rules/no-direct-currency-formatting.spec.js
new file mode 100644
index 0000000000..b112363bb2
--- /dev/null
+++ b/packages/eslint-config-mc-app/rules/no-direct-currency-formatting.spec.js
@@ -0,0 +1,361 @@
+/**
+ * @jest-environment node
+ */
+const { RuleTester } = require('eslint');
+const rule = require('./no-direct-currency-formatting');
+
+const ruleTester = new RuleTester({
+  languageOptions: {
+    ecmaVersion: 2022,
+    sourceType: 'module',
+    parserOptions: {
+      ecmaFeatures: { jsx: true },
+    },
+  },
+});
+
+const error = { messageId: 'noDirectCurrencyFormatting' };
+
+ruleTester.run('no-direct-currency-formatting', rule, {
+  valid: [
+    // ─── intl.formatNumber — non-currency usage ───
+    {
+      code: `intl.formatNumber(42, { style: 'decimal' })`,
+    },
+    {
+      code: `intl.formatNumber(0.5, { style: 'percent' })`,
+    },
+    {
+      code: `intl.formatNumber(42)`,
+    },
+    {
+      code: `intl.formatNumber(42, {})`,
+    },
+
+    // ─── destructured formatNumber — non-currency ───
+    {
+      code: `
+        const { formatNumber } = useIntl();
+        formatNumber(42, { style: 'decimal' });
+      `,
+    },
+    {
+      code: `
+        const { formatNumber } = useIntl();
+        formatNumber(42);
+      `,
+    },
+    // ─── Intl.NumberFormat — non-currency ───
+    {
+      code: `new Intl.NumberFormat('en', { style: 'decimal' })`,
+    },
+    {
+      code: `new Intl.NumberFormat('en')`,
+    },
+    {
+      code: `new Intl.NumberFormat('en', { minimumFractionDigits: 2 })`,
+    },
+    // ─── FormattedNumber — non-currency usage ───
+    // BUG: These currently fail because the rule flags ALL <FormattedNumber />
+    // usage from react-intl, regardless of whether currency props are present.
+    // Non-currency usage (percent, decimal, no style) should be allowed.
+    // Once the rule's JSXOpeningElement handler is fixed to inspect props,
+    // these tests will pass.
+    {
+      code: `
+        import { FormattedNumber } from 'react-intl';
+        const x = <FormattedNumber style="percent" value={0.5} />;
+      `,
+    },
+    {
+      code: `
+        import { FormattedNumber } from 'react-intl';
+        const x = <FormattedNumber style="decimal" value={42} />;
+      `,
+    },
+    {
+      code: `
+        import { FormattedNumber } from 'react-intl';
+        const x = <FormattedNumber value={42} />;
+      `,
+    },
+
+    // ─── Unrelated components with "FormattedNumber" name (not from react-intl) ───
+    {
+      code: `const x = <FormattedNumber value={42} />;`,
+    },
+    {
+      code: `
+        import { FormattedNumber } from './my-components';
+        const x = <FormattedNumber value={42} />;
+      `,
+    },
+    // ─── Unrelated function names ───
+    {
+      code: `intl.formatDate(new Date())`,
+    },
+    {
+      code: `intl.formatMessage({ id: 'hello' })`,
+    },
+    // ─── Allowlisted wrapper path ───
+    {
+      code: `intl.formatNumber(42, { style: 'currency', currency: 'EUR' })`,
+      options: [{ allowedWrapperPaths: ['src/utils/money.js'] }],
+      filename: '/project/src/utils/money.js',
+    },
+    {
+      code: `
+        import { FormattedNumber } from 'react-intl';
+        const x = <FormattedNumber style="currency" currency="EUR" />;
+      `,
+      options: [{ allowedWrapperPaths: ['src/utils/money.js'] }],
+      filename: '/project/src/utils/money.js',
+    },
+    // ─── Allowlisted wrapper path — Windows-style separators ───
+    {
+      code: `intl.formatNumber(42, { style: 'currency', currency: 'EUR' })`,
+      options: [{ allowedWrapperPaths: ['src/utils/money.js'] }],
+      filename: 'C:\\project\\src\\utils\\money.js',
+    },
+
+    // ─── formatNumber on unrelated objects (non-currency) ───
+    {
+      code: `myLib.formatNumber(42, { style: 'decimal' })`,
+    },
+
+    // ─── FormattedNumber — non-currency via namespace import ───
+    // BUG: Same false-positive as named import — namespace access is also
+    // flagged unconditionally without inspecting props.
+    {
+      code: `
+        import * as ReactIntl from 'react-intl';
+        const x = <ReactIntl.FormattedNumber style="percent" value={0.5} />;
+      `,
+    },
+    {
+      code: `
+        import * as ReactIntl from 'react-intl';
+        const x = <ReactIntl.FormattedNumber value={42} />;
+      `,
+    },
+  ],
+
+  invalid: [
+    // ═══════════════════════════════════════════════════
+    // intl.formatNumber with currency
+    // ═══════════════════════════════════════════════════
+    {
+      name: 'intl.formatNumber with style: currency',
+      code: `intl.formatNumber(42, { style: 'currency', currency: 'EUR' })`,
+      errors: [error],
+    },
+    {
+      name: 'intl.formatNumber with currency option only (no style)',
+      code: `intl.formatNumber(42, { currency: 'EUR' })`,
+      errors: [error],
+    },
+    {
+      name: 'intl.formatCurrency call',
+      code: `intl.formatCurrency(42, { currency: 'EUR' })`,
+      errors: [error],
+    },
+    {
+      name: 'intl["formatNumber"] computed member access',
+      code: `intl['formatNumber'](42, { style: 'currency', currency: 'EUR' })`,
+      errors: [error],
+    },
+
+    // ═══════════════════════════════════════════════════
+    // Destructured formatNumber
+    // ═══════════════════════════════════════════════════
+    {
+      name: 'destructured formatNumber from useIntl()',
+      code: `
+        const { formatNumber } = useIntl();
+        formatNumber(42, { style: 'currency', currency: 'EUR' });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'destructured formatNumber with currency option only',
+      code: `
+        const { formatNumber } = useIntl();
+        formatNumber(42, { currency: 'USD' });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'aliased destructured formatNumber',
+      code: `
+        const { formatNumber: fmt } = useIntl();
+        fmt(42, { style: 'currency', currency: 'EUR' });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'formatNumber from function declaration parameter',
+      code: `
+        function Foo({ formatNumber }) {
+          return formatNumber(42, { style: 'currency', currency: 'EUR' });
+        }
+      `,
+      errors: [error],
+    },
+    {
+      name: 'formatNumber from function expression parameter',
+      code: `
+        const Foo = function({ formatNumber }) {
+          return formatNumber(42, { style: 'currency', currency: 'EUR' });
+        }
+      `,
+      errors: [error],
+    },
+    {
+      name: 'formatNumber from arrow function parameter',
+      code: `
+        const Foo = ({ formatNumber }) => formatNumber(42, { currency: 'EUR' });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'destructured formatCurrency from useIntl()',
+      code: `
+        const { formatCurrency } = useIntl();
+        formatCurrency(42, { currency: 'EUR' });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'assigned from member expression: const fmt = intl.formatNumber',
+      code: `
+        const fmt = intl.formatNumber;
+        fmt(42, { style: 'currency', currency: 'EUR' });
+      `,
+      errors: [error],
+    },
+
+    // ═══════════════════════════════════════════════════
+    // Intl.NumberFormat
+    // ═══════════════════════════════════════════════════
+    {
+      name: 'new Intl.NumberFormat with style: currency',
+      code: `new Intl.NumberFormat('en', { style: 'currency', currency: 'EUR' })`,
+      errors: [error],
+    },
+    {
+      name: 'new Intl.NumberFormat with currency option only',
+      code: `new Intl.NumberFormat('en', { currency: 'EUR' })`,
+      errors: [error],
+    },
+
+    // ═══════════════════════════════════════════════════
+    // Variable-resolved options
+    // ═══════════════════════════════════════════════════
+    {
+      name: 'options object in variable with style: currency',
+      code: `
+        const opts = { style: 'currency', currency: 'EUR' };
+        intl.formatNumber(42, opts);
+      `,
+      errors: [error],
+    },
+    {
+      name: 'options with currency in variable',
+      code: `
+        const opts = { currency: 'USD' };
+        intl.formatNumber(42, opts);
+      `,
+      errors: [error],
+    },
+    {
+      name: 'style value resolved through variable',
+      code: `
+        const currencyStyle = 'currency';
+        intl.formatNumber(42, { style: currencyStyle, currency: 'EUR' });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'Intl.NumberFormat with options in variable',
+      code: `
+        const opts = { style: 'currency', currency: 'EUR' };
+        new Intl.NumberFormat('en', opts);
+      `,
+      errors: [error],
+    },
+
+    // ═══════════════════════════════════════════════════
+    // Spread elements
+    // ═══════════════════════════════════════════════════
+    {
+      name: 'currency option via spread',
+      code: `
+        const base = { currency: 'EUR' };
+        intl.formatNumber(42, { ...base });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'style: currency via spread',
+      code: `
+        const base = { style: 'currency' };
+        intl.formatNumber(42, { ...base, currency: 'EUR' });
+      `,
+      errors: [error],
+    },
+    {
+      name: 'nested spread: currency buried two levels deep',
+      code: `
+        const inner = { currency: 'EUR' };
+        const outer = { ...inner };
+        intl.formatNumber(42, { ...outer });
+      `,
+      errors: [error],
+    },
+
+    // ═══════════════════════════════════════════════════
+    // Currency options in first argument
+    // ═══════════════════════════════════════════════════
+    {
+      name: 'currency options passed as first argument',
+      code: `intl.formatNumber({ style: 'currency', currency: 'EUR' })`,
+      errors: [error],
+    },
+
+    // ═══════════════════════════════════════════════════
+    // <FormattedNumber /> — currency usage
+    // ═══════════════════════════════════════════════════
+    {
+      name: 'FormattedNumber with style="currency" (named import)',
+      code: `
+        import { FormattedNumber } from 'react-intl';
+        const x = <FormattedNumber style="currency" currency="EUR" value={42} />;
+      `,
+      errors: [error],
+    },
+    {
+      name: 'FormattedNumber aliased import',
+      code: `
+        import { FormattedNumber as FN } from 'react-intl';
+        const x = <FN style="currency" currency="EUR" value={42} />;
+      `,
+      errors: [error],
+    },
+    {
+      name: 'FormattedNumber via namespace import',
+      code: `
+        import * as ReactIntl from 'react-intl';
+        const x = <ReactIntl.FormattedNumber style="currency" currency="EUR" value={42} />;
+      `,
+      errors: [error],
+    },
+    {
+      name: 'FormattedNumber via require destructuring',
+      code: `
+        const { FormattedNumber } = require('react-intl');
+        const x = <FormattedNumber style="currency" currency="EUR" value={42} />;
+      `,
+      errors: [error],
+    },
+  ],
+});