diff --git a/eslint-plugin-report-name-utils/index.mjs b/eslint-plugin-report-name-utils/index.mjs
new file mode 100644
index 0000000000000..78bbc70504e0f
--- /dev/null
+++ b/eslint-plugin-report-name-utils/index.mjs
@@ -0,0 +1,30 @@
+/**
+ * ESLint plugin that enforces architectural constraints on ReportNameUtils.ts.
+ *
+ * `getReportName` must remain a pure read-only function — it reads from
+ * pre-computed `reportAttributesDerivedValue` and must never call other
+ * functions. All computation belongs in `computeReportName`.
+ */
+
+const noFunctionCallInGetReportName = {
+    meta: {
+        type: 'problem',
+        docs: {description: 'getReportName must be a pure read-only function. Move any computation to computeReportName instead.'},
+        messages: {noFunctionCall: 'getReportName must be a pure read-only function. Move any computation to computeReportName instead.'},
+        schema: [],
+    },
+    create(context) {
+        return {
+            'FunctionDeclaration[id.name="getReportName"] CallExpression': function (node) {
+                context.report({node, messageId: 'noFunctionCall'});
+            },
+        };
+    },
+};
+
+export default {
+    meta: {name: 'eslint-plugin-report-name-utils'},
+    rules: {
+        'no-function-call-in-get-report-name': noFunctionCallInGetReportName,
+    },
+};
diff --git a/eslint.changed.config.mjs b/eslint.changed.config.mjs
index 79114b59a65eb..87417ae72a2ab 100644
--- a/eslint.changed.config.mjs
+++ b/eslint.changed.config.mjs
@@ -1,4 +1,5 @@
 import {defineConfig} from 'eslint/config';
+import reportNameUtilsPlugin from './eslint-plugin-report-name-utils/index.mjs';
 import mainConfig from './eslint.config.mjs';
 
 const restrictedIconImportPaths = [
@@ -106,6 +107,12 @@ const config = defineConfig([
             ],
         },
     },
+
+    {
+        files: ['src/libs/ReportNameUtils.ts'],
+        plugins: {'report-name-utils': reportNameUtilsPlugin},
+        rules: {'report-name-utils/no-function-call-in-get-report-name': 'error'},
+    },
 ]);
 
 export default config;
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 361e2b63b90ae..6051af243bcde 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -14,6 +14,7 @@ import path from 'node:path';
 import {fileURLToPath} from 'node:url';
 import typescriptEslint from 'typescript-eslint';
 import reactCompilerCompat from './eslint-plugin-react-compiler-compat/index.mjs';
+import reportNameUtilsPlugin from './eslint-plugin-report-name-utils/index.mjs';
 
 const filename = fileURLToPath(import.meta.url);
 const dirname = path.dirname(filename);
@@ -592,6 +593,12 @@ const config = defineConfig([
         },
     },
 
+    {
+        files: ['src/libs/ReportNameUtils.ts'],
+        plugins: {'report-name-utils': reportNameUtilsPlugin},
+        rules: {'report-name-utils/no-function-call-in-get-report-name': 'error'},
+    },
+
     {
         files: ['src/**/*'],
         ignores: ['src/languages/**', 'src/CONST/index.ts', 'src/NAICS.ts'],