From efb2832c1be577ec268cedcf773a01924ba95d54 Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Tue, 15 Jul 2025 12:41:01 +1200
Subject: [PATCH 01/10] feat: support using `error` instead of `warn` for rules
 in config

---
 tools/update-lib-configs.js      | 8 +++++++-
 tools/update-lib-flat-configs.js | 8 +++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/tools/update-lib-configs.js b/tools/update-lib-configs.js
index 0c2845e45..384e4ac1d 100644
--- a/tools/update-lib-configs.js
+++ b/tools/update-lib-configs.js
@@ -44,7 +44,9 @@ function formatRules(rules, categoryId) {
       return [rule.ruleId, options]
     })
   )
-  return JSON.stringify(obj, null, 2)
+  // use the ruleLevel variable for rules set to warn so that they can
+  // be made to error with an env variable if desired
+  return JSON.stringify(obj, null, 2).replaceAll('"warn"', 'ruleLevel')
 }
 
 function formatCategory(category) {
@@ -55,6 +57,8 @@ function formatCategory(category) {
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   parserOptions: {
     ecmaVersion: 'latest',
@@ -78,6 +82,8 @@ module.exports = {
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   extends: require.resolve('./${extendsCategoryId}'),
   rules: ${formatRules(category.rules, category.categoryId)}
diff --git a/tools/update-lib-flat-configs.js b/tools/update-lib-flat-configs.js
index e55fb2d01..7d81b3842 100644
--- a/tools/update-lib-flat-configs.js
+++ b/tools/update-lib-flat-configs.js
@@ -44,7 +44,9 @@ function formatRules(rules, categoryId) {
       return [rule.ruleId, options]
     })
   )
-  return JSON.stringify(obj, null, 2)
+  // use the ruleLevel variable for rules set to warn so that they can
+  // be made to error with an env variable if desired
+  return JSON.stringify(obj, null, 2).replaceAll('"warn"', 'ruleLevel')
 }
 
 function formatCategory(category) {
@@ -55,6 +57,8 @@ function formatCategory(category) {
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   {
     name: 'vue/base/setup',
@@ -93,6 +97,8 @@ module.exports = [
 'use strict'
 const config = require('./${extendsCategoryId}.js')
 
+const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   ...config,
   {

From a379d772e7a31849c8af25b2a28df13639719346 Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Tue, 15 Jul 2025 12:41:12 +1200
Subject: [PATCH 02/10] feat: regenerate configs

---
 lib/configs/base.js                           |  3 ++
 lib/configs/flat/base.js                      |  3 ++
 lib/configs/flat/vue2-essential.js            |  3 ++
 lib/configs/flat/vue2-recommended.js          | 19 ++++---
 lib/configs/flat/vue2-strongly-recommended.js | 49 +++++++++--------
 lib/configs/flat/vue3-essential.js            |  3 ++
 lib/configs/flat/vue3-recommended.js          | 19 ++++---
 lib/configs/flat/vue3-strongly-recommended.js | 53 ++++++++++---------
 lib/configs/vue2-essential.js                 |  3 ++
 lib/configs/vue2-recommended.js               | 19 ++++---
 lib/configs/vue2-strongly-recommended.js      | 49 +++++++++--------
 lib/configs/vue3-essential.js                 |  3 ++
 lib/configs/vue3-recommended.js               | 19 ++++---
 lib/configs/vue3-strongly-recommended.js      | 53 ++++++++++---------
 14 files changed, 170 insertions(+), 128 deletions(-)

diff --git a/lib/configs/base.js b/lib/configs/base.js
index c7189fbca..99ad64a2f 100644
--- a/lib/configs/base.js
+++ b/lib/configs/base.js
@@ -3,6 +3,9 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   parserOptions: {
     ecmaVersion: 'latest',
diff --git a/lib/configs/flat/base.js b/lib/configs/flat/base.js
index 22386f377..90ff3ff0b 100644
--- a/lib/configs/flat/base.js
+++ b/lib/configs/flat/base.js
@@ -3,6 +3,9 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   {
     name: 'vue/base/setup',
diff --git a/lib/configs/flat/vue2-essential.js b/lib/configs/flat/vue2-essential.js
index 0d0920413..dd267d0b3 100644
--- a/lib/configs/flat/vue2-essential.js
+++ b/lib/configs/flat/vue2-essential.js
@@ -6,6 +6,9 @@
 'use strict'
 const config = require('./base.js')
 
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   ...config,
   {
diff --git a/lib/configs/flat/vue2-recommended.js b/lib/configs/flat/vue2-recommended.js
index 8a972bf3d..8dfcec9dd 100644
--- a/lib/configs/flat/vue2-recommended.js
+++ b/lib/configs/flat/vue2-recommended.js
@@ -6,19 +6,22 @@
 'use strict'
 const config = require('./vue2-strongly-recommended.js')
 
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   ...config,
   {
     name: 'vue/vue2-recommended/rules',
     rules: {
-      'vue/attributes-order': 'warn',
-      'vue/block-order': 'warn',
-      'vue/no-lone-template': 'warn',
-      'vue/no-multiple-slot-args': 'warn',
-      'vue/no-required-prop-with-default': 'warn',
-      'vue/no-v-html': 'warn',
-      'vue/order-in-components': 'warn',
-      'vue/this-in-template': 'warn'
+      'vue/attributes-order': ruleLevel,
+      'vue/block-order': ruleLevel,
+      'vue/no-lone-template': ruleLevel,
+      'vue/no-multiple-slot-args': ruleLevel,
+      'vue/no-required-prop-with-default': ruleLevel,
+      'vue/no-v-html': ruleLevel,
+      'vue/order-in-components': ruleLevel,
+      'vue/this-in-template': ruleLevel
     }
   }
 ]
diff --git a/lib/configs/flat/vue2-strongly-recommended.js b/lib/configs/flat/vue2-strongly-recommended.js
index e4913f40c..d05f5feb6 100644
--- a/lib/configs/flat/vue2-strongly-recommended.js
+++ b/lib/configs/flat/vue2-strongly-recommended.js
@@ -6,34 +6,37 @@
 'use strict'
 const config = require('./vue2-essential.js')
 
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   ...config,
   {
     name: 'vue/vue2-strongly-recommended/rules',
     rules: {
-      'vue/attribute-hyphenation': 'warn',
-      'vue/component-definition-name-casing': 'warn',
-      'vue/first-attribute-linebreak': 'warn',
-      'vue/html-closing-bracket-newline': 'warn',
-      'vue/html-closing-bracket-spacing': 'warn',
-      'vue/html-end-tags': 'warn',
-      'vue/html-indent': 'warn',
-      'vue/html-quotes': 'warn',
-      'vue/html-self-closing': 'warn',
-      'vue/max-attributes-per-line': 'warn',
-      'vue/multiline-html-element-content-newline': 'warn',
-      'vue/mustache-interpolation-spacing': 'warn',
-      'vue/no-multi-spaces': 'warn',
-      'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
-      'vue/no-template-shadow': 'warn',
-      'vue/one-component-per-file': 'warn',
-      'vue/prop-name-casing': 'warn',
-      'vue/require-default-prop': 'warn',
-      'vue/require-prop-types': 'warn',
-      'vue/singleline-html-element-content-newline': 'warn',
-      'vue/v-bind-style': 'warn',
-      'vue/v-on-style': 'warn',
-      'vue/v-slot-style': 'warn'
+      'vue/attribute-hyphenation': ruleLevel,
+      'vue/component-definition-name-casing': ruleLevel,
+      'vue/first-attribute-linebreak': ruleLevel,
+      'vue/html-closing-bracket-newline': ruleLevel,
+      'vue/html-closing-bracket-spacing': ruleLevel,
+      'vue/html-end-tags': ruleLevel,
+      'vue/html-indent': ruleLevel,
+      'vue/html-quotes': ruleLevel,
+      'vue/html-self-closing': ruleLevel,
+      'vue/max-attributes-per-line': ruleLevel,
+      'vue/multiline-html-element-content-newline': ruleLevel,
+      'vue/mustache-interpolation-spacing': ruleLevel,
+      'vue/no-multi-spaces': ruleLevel,
+      'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
+      'vue/no-template-shadow': ruleLevel,
+      'vue/one-component-per-file': ruleLevel,
+      'vue/prop-name-casing': ruleLevel,
+      'vue/require-default-prop': ruleLevel,
+      'vue/require-prop-types': ruleLevel,
+      'vue/singleline-html-element-content-newline': ruleLevel,
+      'vue/v-bind-style': ruleLevel,
+      'vue/v-on-style': ruleLevel,
+      'vue/v-slot-style': ruleLevel
     }
   }
 ]
diff --git a/lib/configs/flat/vue3-essential.js b/lib/configs/flat/vue3-essential.js
index ff8b5b4a6..cc2acc613 100644
--- a/lib/configs/flat/vue3-essential.js
+++ b/lib/configs/flat/vue3-essential.js
@@ -6,6 +6,9 @@
 'use strict'
 const config = require('./base.js')
 
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   ...config,
   {
diff --git a/lib/configs/flat/vue3-recommended.js b/lib/configs/flat/vue3-recommended.js
index 21be71a8d..f46bc901a 100644
--- a/lib/configs/flat/vue3-recommended.js
+++ b/lib/configs/flat/vue3-recommended.js
@@ -6,19 +6,22 @@
 'use strict'
 const config = require('./vue3-strongly-recommended.js')
 
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   ...config,
   {
     name: 'vue/recommended/rules',
     rules: {
-      'vue/attributes-order': 'warn',
-      'vue/block-order': 'warn',
-      'vue/no-lone-template': 'warn',
-      'vue/no-multiple-slot-args': 'warn',
-      'vue/no-required-prop-with-default': 'warn',
-      'vue/no-v-html': 'warn',
-      'vue/order-in-components': 'warn',
-      'vue/this-in-template': 'warn'
+      'vue/attributes-order': ruleLevel,
+      'vue/block-order': ruleLevel,
+      'vue/no-lone-template': ruleLevel,
+      'vue/no-multiple-slot-args': ruleLevel,
+      'vue/no-required-prop-with-default': ruleLevel,
+      'vue/no-v-html': ruleLevel,
+      'vue/order-in-components': ruleLevel,
+      'vue/this-in-template': ruleLevel
     }
   }
 ]
diff --git a/lib/configs/flat/vue3-strongly-recommended.js b/lib/configs/flat/vue3-strongly-recommended.js
index fee1d3bb8..48db1aa90 100644
--- a/lib/configs/flat/vue3-strongly-recommended.js
+++ b/lib/configs/flat/vue3-strongly-recommended.js
@@ -6,42 +6,45 @@
 'use strict'
 const config = require('./vue3-essential.js')
 
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = [
   ...config,
   {
     name: 'vue/strongly-recommended/rules',
     rules: {
-      'vue/attribute-hyphenation': 'warn',
-      'vue/component-definition-name-casing': 'warn',
-      'vue/first-attribute-linebreak': 'warn',
-      'vue/html-closing-bracket-newline': 'warn',
-      'vue/html-closing-bracket-spacing': 'warn',
-      'vue/html-end-tags': 'warn',
-      'vue/html-indent': 'warn',
-      'vue/html-quotes': 'warn',
-      'vue/html-self-closing': 'warn',
-      'vue/max-attributes-per-line': 'warn',
-      'vue/multiline-html-element-content-newline': 'warn',
-      'vue/mustache-interpolation-spacing': 'warn',
-      'vue/no-multi-spaces': 'warn',
-      'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
-      'vue/no-template-shadow': 'warn',
-      'vue/one-component-per-file': 'warn',
-      'vue/prop-name-casing': 'warn',
-      'vue/require-default-prop': 'warn',
-      'vue/require-explicit-emits': 'warn',
-      'vue/require-prop-types': 'warn',
-      'vue/singleline-html-element-content-newline': 'warn',
-      'vue/v-bind-style': 'warn',
+      'vue/attribute-hyphenation': ruleLevel,
+      'vue/component-definition-name-casing': ruleLevel,
+      'vue/first-attribute-linebreak': ruleLevel,
+      'vue/html-closing-bracket-newline': ruleLevel,
+      'vue/html-closing-bracket-spacing': ruleLevel,
+      'vue/html-end-tags': ruleLevel,
+      'vue/html-indent': ruleLevel,
+      'vue/html-quotes': ruleLevel,
+      'vue/html-self-closing': ruleLevel,
+      'vue/max-attributes-per-line': ruleLevel,
+      'vue/multiline-html-element-content-newline': ruleLevel,
+      'vue/mustache-interpolation-spacing': ruleLevel,
+      'vue/no-multi-spaces': ruleLevel,
+      'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
+      'vue/no-template-shadow': ruleLevel,
+      'vue/one-component-per-file': ruleLevel,
+      'vue/prop-name-casing': ruleLevel,
+      'vue/require-default-prop': ruleLevel,
+      'vue/require-explicit-emits': ruleLevel,
+      'vue/require-prop-types': ruleLevel,
+      'vue/singleline-html-element-content-newline': ruleLevel,
+      'vue/v-bind-style': ruleLevel,
       'vue/v-on-event-hyphenation': [
-        'warn',
+        ruleLevel,
         'always',
         {
           autofix: true
         }
       ],
-      'vue/v-on-style': 'warn',
-      'vue/v-slot-style': 'warn'
+      'vue/v-on-style': ruleLevel,
+      'vue/v-slot-style': ruleLevel
     }
   }
 ]
diff --git a/lib/configs/vue2-essential.js b/lib/configs/vue2-essential.js
index e2c66ceba..12191cf1d 100644
--- a/lib/configs/vue2-essential.js
+++ b/lib/configs/vue2-essential.js
@@ -3,6 +3,9 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   extends: require.resolve('./base'),
   rules: {
diff --git a/lib/configs/vue2-recommended.js b/lib/configs/vue2-recommended.js
index 9892867c1..a9957d27d 100644
--- a/lib/configs/vue2-recommended.js
+++ b/lib/configs/vue2-recommended.js
@@ -3,16 +3,19 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   extends: require.resolve('./vue2-strongly-recommended'),
   rules: {
-    'vue/attributes-order': 'warn',
-    'vue/block-order': 'warn',
-    'vue/no-lone-template': 'warn',
-    'vue/no-multiple-slot-args': 'warn',
-    'vue/no-required-prop-with-default': 'warn',
-    'vue/no-v-html': 'warn',
-    'vue/order-in-components': 'warn',
-    'vue/this-in-template': 'warn'
+    'vue/attributes-order': ruleLevel,
+    'vue/block-order': ruleLevel,
+    'vue/no-lone-template': ruleLevel,
+    'vue/no-multiple-slot-args': ruleLevel,
+    'vue/no-required-prop-with-default': ruleLevel,
+    'vue/no-v-html': ruleLevel,
+    'vue/order-in-components': ruleLevel,
+    'vue/this-in-template': ruleLevel
   }
 }
diff --git a/lib/configs/vue2-strongly-recommended.js b/lib/configs/vue2-strongly-recommended.js
index e7b0f3dc7..47ca2ca7f 100644
--- a/lib/configs/vue2-strongly-recommended.js
+++ b/lib/configs/vue2-strongly-recommended.js
@@ -3,31 +3,34 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   extends: require.resolve('./vue2-essential'),
   rules: {
-    'vue/attribute-hyphenation': 'warn',
-    'vue/component-definition-name-casing': 'warn',
-    'vue/first-attribute-linebreak': 'warn',
-    'vue/html-closing-bracket-newline': 'warn',
-    'vue/html-closing-bracket-spacing': 'warn',
-    'vue/html-end-tags': 'warn',
-    'vue/html-indent': 'warn',
-    'vue/html-quotes': 'warn',
-    'vue/html-self-closing': 'warn',
-    'vue/max-attributes-per-line': 'warn',
-    'vue/multiline-html-element-content-newline': 'warn',
-    'vue/mustache-interpolation-spacing': 'warn',
-    'vue/no-multi-spaces': 'warn',
-    'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
-    'vue/no-template-shadow': 'warn',
-    'vue/one-component-per-file': 'warn',
-    'vue/prop-name-casing': 'warn',
-    'vue/require-default-prop': 'warn',
-    'vue/require-prop-types': 'warn',
-    'vue/singleline-html-element-content-newline': 'warn',
-    'vue/v-bind-style': 'warn',
-    'vue/v-on-style': 'warn',
-    'vue/v-slot-style': 'warn'
+    'vue/attribute-hyphenation': ruleLevel,
+    'vue/component-definition-name-casing': ruleLevel,
+    'vue/first-attribute-linebreak': ruleLevel,
+    'vue/html-closing-bracket-newline': ruleLevel,
+    'vue/html-closing-bracket-spacing': ruleLevel,
+    'vue/html-end-tags': ruleLevel,
+    'vue/html-indent': ruleLevel,
+    'vue/html-quotes': ruleLevel,
+    'vue/html-self-closing': ruleLevel,
+    'vue/max-attributes-per-line': ruleLevel,
+    'vue/multiline-html-element-content-newline': ruleLevel,
+    'vue/mustache-interpolation-spacing': ruleLevel,
+    'vue/no-multi-spaces': ruleLevel,
+    'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
+    'vue/no-template-shadow': ruleLevel,
+    'vue/one-component-per-file': ruleLevel,
+    'vue/prop-name-casing': ruleLevel,
+    'vue/require-default-prop': ruleLevel,
+    'vue/require-prop-types': ruleLevel,
+    'vue/singleline-html-element-content-newline': ruleLevel,
+    'vue/v-bind-style': ruleLevel,
+    'vue/v-on-style': ruleLevel,
+    'vue/v-slot-style': ruleLevel
   }
 }
diff --git a/lib/configs/vue3-essential.js b/lib/configs/vue3-essential.js
index 34b3229b1..991dc5a27 100644
--- a/lib/configs/vue3-essential.js
+++ b/lib/configs/vue3-essential.js
@@ -3,6 +3,9 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   extends: require.resolve('./base'),
   rules: {
diff --git a/lib/configs/vue3-recommended.js b/lib/configs/vue3-recommended.js
index 083f6c65b..1346a6da3 100644
--- a/lib/configs/vue3-recommended.js
+++ b/lib/configs/vue3-recommended.js
@@ -3,16 +3,19 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   extends: require.resolve('./vue3-strongly-recommended'),
   rules: {
-    'vue/attributes-order': 'warn',
-    'vue/block-order': 'warn',
-    'vue/no-lone-template': 'warn',
-    'vue/no-multiple-slot-args': 'warn',
-    'vue/no-required-prop-with-default': 'warn',
-    'vue/no-v-html': 'warn',
-    'vue/order-in-components': 'warn',
-    'vue/this-in-template': 'warn'
+    'vue/attributes-order': ruleLevel,
+    'vue/block-order': ruleLevel,
+    'vue/no-lone-template': ruleLevel,
+    'vue/no-multiple-slot-args': ruleLevel,
+    'vue/no-required-prop-with-default': ruleLevel,
+    'vue/no-v-html': ruleLevel,
+    'vue/order-in-components': ruleLevel,
+    'vue/this-in-template': ruleLevel
   }
 }
diff --git a/lib/configs/vue3-strongly-recommended.js b/lib/configs/vue3-strongly-recommended.js
index a3f854fc4..6b984eb4f 100644
--- a/lib/configs/vue3-strongly-recommended.js
+++ b/lib/configs/vue3-strongly-recommended.js
@@ -3,39 +3,42 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
+const ruleLevel =
+  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+
 module.exports = {
   extends: require.resolve('./vue3-essential'),
   rules: {
-    'vue/attribute-hyphenation': 'warn',
-    'vue/component-definition-name-casing': 'warn',
-    'vue/first-attribute-linebreak': 'warn',
-    'vue/html-closing-bracket-newline': 'warn',
-    'vue/html-closing-bracket-spacing': 'warn',
-    'vue/html-end-tags': 'warn',
-    'vue/html-indent': 'warn',
-    'vue/html-quotes': 'warn',
-    'vue/html-self-closing': 'warn',
-    'vue/max-attributes-per-line': 'warn',
-    'vue/multiline-html-element-content-newline': 'warn',
-    'vue/mustache-interpolation-spacing': 'warn',
-    'vue/no-multi-spaces': 'warn',
-    'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
-    'vue/no-template-shadow': 'warn',
-    'vue/one-component-per-file': 'warn',
-    'vue/prop-name-casing': 'warn',
-    'vue/require-default-prop': 'warn',
-    'vue/require-explicit-emits': 'warn',
-    'vue/require-prop-types': 'warn',
-    'vue/singleline-html-element-content-newline': 'warn',
-    'vue/v-bind-style': 'warn',
+    'vue/attribute-hyphenation': ruleLevel,
+    'vue/component-definition-name-casing': ruleLevel,
+    'vue/first-attribute-linebreak': ruleLevel,
+    'vue/html-closing-bracket-newline': ruleLevel,
+    'vue/html-closing-bracket-spacing': ruleLevel,
+    'vue/html-end-tags': ruleLevel,
+    'vue/html-indent': ruleLevel,
+    'vue/html-quotes': ruleLevel,
+    'vue/html-self-closing': ruleLevel,
+    'vue/max-attributes-per-line': ruleLevel,
+    'vue/multiline-html-element-content-newline': ruleLevel,
+    'vue/mustache-interpolation-spacing': ruleLevel,
+    'vue/no-multi-spaces': ruleLevel,
+    'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
+    'vue/no-template-shadow': ruleLevel,
+    'vue/one-component-per-file': ruleLevel,
+    'vue/prop-name-casing': ruleLevel,
+    'vue/require-default-prop': ruleLevel,
+    'vue/require-explicit-emits': ruleLevel,
+    'vue/require-prop-types': ruleLevel,
+    'vue/singleline-html-element-content-newline': ruleLevel,
+    'vue/v-bind-style': ruleLevel,
     'vue/v-on-event-hyphenation': [
-      'warn',
+      ruleLevel,
       'always',
       {
         autofix: true
       }
     ],
-    'vue/v-on-style': 'warn',
-    'vue/v-slot-style': 'warn'
+    'vue/v-on-style': ruleLevel,
+    'vue/v-slot-style': ruleLevel
   }
 }

From be3db8df23f48673c5b46120d572ebf59f95a0c6 Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Tue, 15 Jul 2025 12:54:49 +1200
Subject: [PATCH 03/10] feat: only define variable if it is needed

---
 tools/update-lib-configs.js      | 13 +++++++++----
 tools/update-lib-flat-configs.js | 13 +++++++++----
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/tools/update-lib-configs.js b/tools/update-lib-configs.js
index 384e4ac1d..bebd8691a 100644
--- a/tools/update-lib-configs.js
+++ b/tools/update-lib-configs.js
@@ -51,13 +51,18 @@ function formatRules(rules, categoryId) {
 
 function formatCategory(category) {
   const extendsCategoryId = extendsCategories[category.categoryId]
+  const formattedRules = formatRules(category.rules, category.categoryId)
+  const ruleLevelVariable = formattedRules.includes('ruleLevel')
+    ? "const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'"
+    : ''
+
   if (extendsCategoryId == null) {
     return `/*
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+${ruleLevelVariable}
 
 module.exports = {
   parserOptions: {
@@ -67,7 +72,7 @@ module.exports = {
   plugins: [
     'vue'
   ],
-  rules: ${formatRules(category.rules, category.categoryId)},
+  rules: ${formattedRules},
   overrides: [
     {
       files: '*.vue',
@@ -82,11 +87,11 @@ module.exports = {
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+${ruleLevelVariable}
 
 module.exports = {
   extends: require.resolve('./${extendsCategoryId}'),
-  rules: ${formatRules(category.rules, category.categoryId)}
+  rules: ${formattedRules}
 }
 `
 }
diff --git a/tools/update-lib-flat-configs.js b/tools/update-lib-flat-configs.js
index 7d81b3842..ef7b136b3 100644
--- a/tools/update-lib-flat-configs.js
+++ b/tools/update-lib-flat-configs.js
@@ -51,13 +51,18 @@ function formatRules(rules, categoryId) {
 
 function formatCategory(category) {
   const extendsCategoryId = extendsCategories[category.categoryId]
+  const formattedRules = formatRules(category.rules, category.categoryId)
+  const ruleLevelVariable = formattedRules.includes('ruleLevel')
+    ? "const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'"
+    : ''
+
   if (category.categoryId === 'base') {
     return `/*
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+${ruleLevelVariable}
 
 module.exports = [
   {
@@ -83,7 +88,7 @@ module.exports = [
       parser: require('vue-eslint-parser'),
       sourceType: 'module',
     },
-    rules: ${formatRules(category.rules, category.categoryId)},
+    rules: ${formattedRules},
     processor: 'vue/vue'
   }
 ]
@@ -97,13 +102,13 @@ module.exports = [
 'use strict'
 const config = require('./${extendsCategoryId}.js')
 
-const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
+${ruleLevelVariable}
 
 module.exports = [
   ...config,
   {
     name: 'vue/${category.categoryId.replace(/^vue3-/u, '')}/rules',
-    rules: ${formatRules(category.rules, category.categoryId)},
+    rules: ${formattedRules},
   }
 ]
 `

From 98888a6def05a23e7e3e3f501aaad93bbd111b86 Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Tue, 15 Jul 2025 12:56:48 +1200
Subject: [PATCH 04/10] feat: regenerate rules

---
 lib/configs/base.js                | 2 --
 lib/configs/flat/base.js           | 2 --
 lib/configs/flat/vue2-essential.js | 3 ---
 lib/configs/flat/vue3-essential.js | 3 ---
 lib/configs/vue2-essential.js      | 2 --
 lib/configs/vue3-essential.js      | 2 --
 6 files changed, 14 deletions(-)

diff --git a/lib/configs/base.js b/lib/configs/base.js
index 99ad64a2f..2b63dc1f3 100644
--- a/lib/configs/base.js
+++ b/lib/configs/base.js
@@ -3,8 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
 
 module.exports = {
   parserOptions: {
diff --git a/lib/configs/flat/base.js b/lib/configs/flat/base.js
index 90ff3ff0b..84957aae4 100644
--- a/lib/configs/flat/base.js
+++ b/lib/configs/flat/base.js
@@ -3,8 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
 
 module.exports = [
   {
diff --git a/lib/configs/flat/vue2-essential.js b/lib/configs/flat/vue2-essential.js
index dd267d0b3..0d0920413 100644
--- a/lib/configs/flat/vue2-essential.js
+++ b/lib/configs/flat/vue2-essential.js
@@ -6,9 +6,6 @@
 'use strict'
 const config = require('./base.js')
 
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = [
   ...config,
   {
diff --git a/lib/configs/flat/vue3-essential.js b/lib/configs/flat/vue3-essential.js
index cc2acc613..ff8b5b4a6 100644
--- a/lib/configs/flat/vue3-essential.js
+++ b/lib/configs/flat/vue3-essential.js
@@ -6,9 +6,6 @@
 'use strict'
 const config = require('./base.js')
 
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = [
   ...config,
   {
diff --git a/lib/configs/vue2-essential.js b/lib/configs/vue2-essential.js
index 12191cf1d..13b0c5f67 100644
--- a/lib/configs/vue2-essential.js
+++ b/lib/configs/vue2-essential.js
@@ -3,8 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
 
 module.exports = {
   extends: require.resolve('./base'),
diff --git a/lib/configs/vue3-essential.js b/lib/configs/vue3-essential.js
index 991dc5a27..da13f0ad2 100644
--- a/lib/configs/vue3-essential.js
+++ b/lib/configs/vue3-essential.js
@@ -3,8 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
 
 module.exports = {
   extends: require.resolve('./base'),

From 3dd94e3907afe6edfc9fa70ccf6c7e0ab188dec6 Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Tue, 15 Jul 2025 12:58:21 +1200
Subject: [PATCH 05/10] docs: add note to user guide

---
 docs/user-guide/index.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/user-guide/index.md b/docs/user-guide/index.md
index 103471f61..4d8e40b24 100644
--- a/docs/user-guide/index.md
+++ b/docs/user-guide/index.md
@@ -73,6 +73,8 @@ You can use the following configs by adding them to `eslint.config.js`.
 
 :::warning Reporting rules
 By default, all rules from **base** and **essential** categories report ESLint errors. Other rules - because they're not covering potential bugs in the application - report warnings. What does it mean? By default - nothing, but if you want - you can set up a threshold and break the build after a certain amount of warnings, instead of any. More information [here](https://eslint.org/docs/user-guide/command-line-interface#handling-warnings).
+
+Alternatively, you can set `process.env.VUE_ESLINT_ALWAYS_ERROR` to `true` in your configuration file to have `error` be used by all rules.
 :::
 
 #### Specifying Globals (`eslint.config.js`)

From d7990e927ca5b4e71007b99055b68df2fc3860e2 Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Fri, 1 Aug 2025 08:10:42 +1200
Subject: [PATCH 06/10] fix: avoid unneeded blank line

---
 lib/configs/base.js              |  1 -
 lib/configs/flat/base.js         |  1 -
 lib/configs/vue2-essential.js    |  1 -
 lib/configs/vue3-essential.js    |  1 -
 tools/update-lib-configs.js      | 10 +++-------
 tools/update-lib-flat-configs.js |  6 ++----
 6 files changed, 5 insertions(+), 15 deletions(-)

diff --git a/lib/configs/base.js b/lib/configs/base.js
index 2b63dc1f3..c7189fbca 100644
--- a/lib/configs/base.js
+++ b/lib/configs/base.js
@@ -3,7 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-
 module.exports = {
   parserOptions: {
     ecmaVersion: 'latest',
diff --git a/lib/configs/flat/base.js b/lib/configs/flat/base.js
index 84957aae4..22386f377 100644
--- a/lib/configs/flat/base.js
+++ b/lib/configs/flat/base.js
@@ -3,7 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-
 module.exports = [
   {
     name: 'vue/base/setup',
diff --git a/lib/configs/vue2-essential.js b/lib/configs/vue2-essential.js
index 13b0c5f67..e2c66ceba 100644
--- a/lib/configs/vue2-essential.js
+++ b/lib/configs/vue2-essential.js
@@ -3,7 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-
 module.exports = {
   extends: require.resolve('./base'),
   rules: {
diff --git a/lib/configs/vue3-essential.js b/lib/configs/vue3-essential.js
index da13f0ad2..34b3229b1 100644
--- a/lib/configs/vue3-essential.js
+++ b/lib/configs/vue3-essential.js
@@ -3,7 +3,6 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-
 module.exports = {
   extends: require.resolve('./base'),
   rules: {
diff --git a/tools/update-lib-configs.js b/tools/update-lib-configs.js
index bebd8691a..d7e857e50 100644
--- a/tools/update-lib-configs.js
+++ b/tools/update-lib-configs.js
@@ -53,7 +53,7 @@ function formatCategory(category) {
   const extendsCategoryId = extendsCategories[category.categoryId]
   const formattedRules = formatRules(category.rules, category.categoryId)
   const ruleLevelVariable = formattedRules.includes('ruleLevel')
-    ? "const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'"
+    ? "\nconst ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'\n"
     : ''
 
   if (extendsCategoryId == null) {
@@ -61,9 +61,7 @@ function formatCategory(category) {
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
- */
-${ruleLevelVariable}
-
+ */${ruleLevelVariable}
 module.exports = {
   parserOptions: {
     ecmaVersion: 'latest',
@@ -86,9 +84,7 @@ module.exports = {
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
- */
-${ruleLevelVariable}
-
+ */${ruleLevelVariable}
 module.exports = {
   extends: require.resolve('./${extendsCategoryId}'),
   rules: ${formattedRules}
diff --git a/tools/update-lib-flat-configs.js b/tools/update-lib-flat-configs.js
index ef7b136b3..6894f00d6 100644
--- a/tools/update-lib-flat-configs.js
+++ b/tools/update-lib-flat-configs.js
@@ -53,7 +53,7 @@ function formatCategory(category) {
   const extendsCategoryId = extendsCategories[category.categoryId]
   const formattedRules = formatRules(category.rules, category.categoryId)
   const ruleLevelVariable = formattedRules.includes('ruleLevel')
-    ? "const ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'"
+    ? "\nconst ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'\n"
     : ''
 
   if (category.categoryId === 'base') {
@@ -61,9 +61,7 @@ function formatCategory(category) {
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
- */
-${ruleLevelVariable}
-
+ */${ruleLevelVariable}
 module.exports = [
   {
     name: 'vue/base/setup',

From 1b8f18f4b2c573f585646114c2d953974aea50ba Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Fri, 1 Aug 2025 08:13:33 +1200
Subject: [PATCH 07/10] chore: add changeset entry

---
 .changeset/brown-eels-care.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/brown-eels-care.md

diff --git a/.changeset/brown-eels-care.md b/.changeset/brown-eels-care.md
new file mode 100644
index 000000000..6d26027f0
--- /dev/null
+++ b/.changeset/brown-eels-care.md
@@ -0,0 +1,5 @@
+---
+"eslint-plugin-vue": minor
+---
+
+Use `error` instead of `warn` in configs when `VUE_ESLINT_ALWAYS_ERROR` env variable is `"true"`

From 2929ceb0ca1c64b5b59eb6816b60d0cd3e3195dc Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Fri, 8 Aug 2025 15:49:20 +1200
Subject: [PATCH 08/10] revert: don't use an env variable

Revert "feat: support using `error` instead of `warn` for rules in
config"

This reverts commit efb2832c1be577ec268cedcf773a01924ba95d54.

Revert "feat: regenerate configs"

This reverts commit a379d772e7a31849c8af25b2a28df13639719346.

Revert "feat: only define variable if it is needed"

This reverts commit be3db8df23f48673c5b46120d572ebf59f95a0c6.

Revert "feat: regenerate rules"

This reverts commit 98888a6def05a23e7e3e3f501aaad93bbd111b86.

Revert "docs: add note to user guide"

This reverts commit 3dd94e3907afe6edfc9fa70ccf6c7e0ab188dec6.

Revert "fix: avoid unneeded blank line"

This reverts commit d7990e927ca5b4e71007b99055b68df2fc3860e2.
---
 docs/user-guide/index.md                      |  2 -
 lib/configs/flat/vue2-recommended.js          | 19 +++----
 lib/configs/flat/vue2-strongly-recommended.js | 49 ++++++++---------
 lib/configs/flat/vue3-recommended.js          | 19 +++----
 lib/configs/flat/vue3-strongly-recommended.js | 53 +++++++++----------
 lib/configs/vue2-recommended.js               | 19 +++----
 lib/configs/vue2-strongly-recommended.js      | 49 ++++++++---------
 lib/configs/vue3-recommended.js               | 19 +++----
 lib/configs/vue3-strongly-recommended.js      | 53 +++++++++----------
 tools/update-lib-configs.js                   | 17 ++----
 tools/update-lib-flat-configs.js              | 17 ++----
 11 files changed, 137 insertions(+), 179 deletions(-)

diff --git a/docs/user-guide/index.md b/docs/user-guide/index.md
index 4d8e40b24..103471f61 100644
--- a/docs/user-guide/index.md
+++ b/docs/user-guide/index.md
@@ -73,8 +73,6 @@ You can use the following configs by adding them to `eslint.config.js`.
 
 :::warning Reporting rules
 By default, all rules from **base** and **essential** categories report ESLint errors. Other rules - because they're not covering potential bugs in the application - report warnings. What does it mean? By default - nothing, but if you want - you can set up a threshold and break the build after a certain amount of warnings, instead of any. More information [here](https://eslint.org/docs/user-guide/command-line-interface#handling-warnings).
-
-Alternatively, you can set `process.env.VUE_ESLINT_ALWAYS_ERROR` to `true` in your configuration file to have `error` be used by all rules.
 :::
 
 #### Specifying Globals (`eslint.config.js`)
diff --git a/lib/configs/flat/vue2-recommended.js b/lib/configs/flat/vue2-recommended.js
index 8dfcec9dd..8a972bf3d 100644
--- a/lib/configs/flat/vue2-recommended.js
+++ b/lib/configs/flat/vue2-recommended.js
@@ -6,22 +6,19 @@
 'use strict'
 const config = require('./vue2-strongly-recommended.js')
 
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = [
   ...config,
   {
     name: 'vue/vue2-recommended/rules',
     rules: {
-      'vue/attributes-order': ruleLevel,
-      'vue/block-order': ruleLevel,
-      'vue/no-lone-template': ruleLevel,
-      'vue/no-multiple-slot-args': ruleLevel,
-      'vue/no-required-prop-with-default': ruleLevel,
-      'vue/no-v-html': ruleLevel,
-      'vue/order-in-components': ruleLevel,
-      'vue/this-in-template': ruleLevel
+      'vue/attributes-order': 'warn',
+      'vue/block-order': 'warn',
+      'vue/no-lone-template': 'warn',
+      'vue/no-multiple-slot-args': 'warn',
+      'vue/no-required-prop-with-default': 'warn',
+      'vue/no-v-html': 'warn',
+      'vue/order-in-components': 'warn',
+      'vue/this-in-template': 'warn'
     }
   }
 ]
diff --git a/lib/configs/flat/vue2-strongly-recommended.js b/lib/configs/flat/vue2-strongly-recommended.js
index d05f5feb6..e4913f40c 100644
--- a/lib/configs/flat/vue2-strongly-recommended.js
+++ b/lib/configs/flat/vue2-strongly-recommended.js
@@ -6,37 +6,34 @@
 'use strict'
 const config = require('./vue2-essential.js')
 
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = [
   ...config,
   {
     name: 'vue/vue2-strongly-recommended/rules',
     rules: {
-      'vue/attribute-hyphenation': ruleLevel,
-      'vue/component-definition-name-casing': ruleLevel,
-      'vue/first-attribute-linebreak': ruleLevel,
-      'vue/html-closing-bracket-newline': ruleLevel,
-      'vue/html-closing-bracket-spacing': ruleLevel,
-      'vue/html-end-tags': ruleLevel,
-      'vue/html-indent': ruleLevel,
-      'vue/html-quotes': ruleLevel,
-      'vue/html-self-closing': ruleLevel,
-      'vue/max-attributes-per-line': ruleLevel,
-      'vue/multiline-html-element-content-newline': ruleLevel,
-      'vue/mustache-interpolation-spacing': ruleLevel,
-      'vue/no-multi-spaces': ruleLevel,
-      'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
-      'vue/no-template-shadow': ruleLevel,
-      'vue/one-component-per-file': ruleLevel,
-      'vue/prop-name-casing': ruleLevel,
-      'vue/require-default-prop': ruleLevel,
-      'vue/require-prop-types': ruleLevel,
-      'vue/singleline-html-element-content-newline': ruleLevel,
-      'vue/v-bind-style': ruleLevel,
-      'vue/v-on-style': ruleLevel,
-      'vue/v-slot-style': ruleLevel
+      'vue/attribute-hyphenation': 'warn',
+      'vue/component-definition-name-casing': 'warn',
+      'vue/first-attribute-linebreak': 'warn',
+      'vue/html-closing-bracket-newline': 'warn',
+      'vue/html-closing-bracket-spacing': 'warn',
+      'vue/html-end-tags': 'warn',
+      'vue/html-indent': 'warn',
+      'vue/html-quotes': 'warn',
+      'vue/html-self-closing': 'warn',
+      'vue/max-attributes-per-line': 'warn',
+      'vue/multiline-html-element-content-newline': 'warn',
+      'vue/mustache-interpolation-spacing': 'warn',
+      'vue/no-multi-spaces': 'warn',
+      'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
+      'vue/no-template-shadow': 'warn',
+      'vue/one-component-per-file': 'warn',
+      'vue/prop-name-casing': 'warn',
+      'vue/require-default-prop': 'warn',
+      'vue/require-prop-types': 'warn',
+      'vue/singleline-html-element-content-newline': 'warn',
+      'vue/v-bind-style': 'warn',
+      'vue/v-on-style': 'warn',
+      'vue/v-slot-style': 'warn'
     }
   }
 ]
diff --git a/lib/configs/flat/vue3-recommended.js b/lib/configs/flat/vue3-recommended.js
index f46bc901a..21be71a8d 100644
--- a/lib/configs/flat/vue3-recommended.js
+++ b/lib/configs/flat/vue3-recommended.js
@@ -6,22 +6,19 @@
 'use strict'
 const config = require('./vue3-strongly-recommended.js')
 
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = [
   ...config,
   {
     name: 'vue/recommended/rules',
     rules: {
-      'vue/attributes-order': ruleLevel,
-      'vue/block-order': ruleLevel,
-      'vue/no-lone-template': ruleLevel,
-      'vue/no-multiple-slot-args': ruleLevel,
-      'vue/no-required-prop-with-default': ruleLevel,
-      'vue/no-v-html': ruleLevel,
-      'vue/order-in-components': ruleLevel,
-      'vue/this-in-template': ruleLevel
+      'vue/attributes-order': 'warn',
+      'vue/block-order': 'warn',
+      'vue/no-lone-template': 'warn',
+      'vue/no-multiple-slot-args': 'warn',
+      'vue/no-required-prop-with-default': 'warn',
+      'vue/no-v-html': 'warn',
+      'vue/order-in-components': 'warn',
+      'vue/this-in-template': 'warn'
     }
   }
 ]
diff --git a/lib/configs/flat/vue3-strongly-recommended.js b/lib/configs/flat/vue3-strongly-recommended.js
index 48db1aa90..fee1d3bb8 100644
--- a/lib/configs/flat/vue3-strongly-recommended.js
+++ b/lib/configs/flat/vue3-strongly-recommended.js
@@ -6,45 +6,42 @@
 'use strict'
 const config = require('./vue3-essential.js')
 
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = [
   ...config,
   {
     name: 'vue/strongly-recommended/rules',
     rules: {
-      'vue/attribute-hyphenation': ruleLevel,
-      'vue/component-definition-name-casing': ruleLevel,
-      'vue/first-attribute-linebreak': ruleLevel,
-      'vue/html-closing-bracket-newline': ruleLevel,
-      'vue/html-closing-bracket-spacing': ruleLevel,
-      'vue/html-end-tags': ruleLevel,
-      'vue/html-indent': ruleLevel,
-      'vue/html-quotes': ruleLevel,
-      'vue/html-self-closing': ruleLevel,
-      'vue/max-attributes-per-line': ruleLevel,
-      'vue/multiline-html-element-content-newline': ruleLevel,
-      'vue/mustache-interpolation-spacing': ruleLevel,
-      'vue/no-multi-spaces': ruleLevel,
-      'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
-      'vue/no-template-shadow': ruleLevel,
-      'vue/one-component-per-file': ruleLevel,
-      'vue/prop-name-casing': ruleLevel,
-      'vue/require-default-prop': ruleLevel,
-      'vue/require-explicit-emits': ruleLevel,
-      'vue/require-prop-types': ruleLevel,
-      'vue/singleline-html-element-content-newline': ruleLevel,
-      'vue/v-bind-style': ruleLevel,
+      'vue/attribute-hyphenation': 'warn',
+      'vue/component-definition-name-casing': 'warn',
+      'vue/first-attribute-linebreak': 'warn',
+      'vue/html-closing-bracket-newline': 'warn',
+      'vue/html-closing-bracket-spacing': 'warn',
+      'vue/html-end-tags': 'warn',
+      'vue/html-indent': 'warn',
+      'vue/html-quotes': 'warn',
+      'vue/html-self-closing': 'warn',
+      'vue/max-attributes-per-line': 'warn',
+      'vue/multiline-html-element-content-newline': 'warn',
+      'vue/mustache-interpolation-spacing': 'warn',
+      'vue/no-multi-spaces': 'warn',
+      'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
+      'vue/no-template-shadow': 'warn',
+      'vue/one-component-per-file': 'warn',
+      'vue/prop-name-casing': 'warn',
+      'vue/require-default-prop': 'warn',
+      'vue/require-explicit-emits': 'warn',
+      'vue/require-prop-types': 'warn',
+      'vue/singleline-html-element-content-newline': 'warn',
+      'vue/v-bind-style': 'warn',
       'vue/v-on-event-hyphenation': [
-        ruleLevel,
+        'warn',
         'always',
         {
           autofix: true
         }
       ],
-      'vue/v-on-style': ruleLevel,
-      'vue/v-slot-style': ruleLevel
+      'vue/v-on-style': 'warn',
+      'vue/v-slot-style': 'warn'
     }
   }
 ]
diff --git a/lib/configs/vue2-recommended.js b/lib/configs/vue2-recommended.js
index a9957d27d..9892867c1 100644
--- a/lib/configs/vue2-recommended.js
+++ b/lib/configs/vue2-recommended.js
@@ -3,19 +3,16 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = {
   extends: require.resolve('./vue2-strongly-recommended'),
   rules: {
-    'vue/attributes-order': ruleLevel,
-    'vue/block-order': ruleLevel,
-    'vue/no-lone-template': ruleLevel,
-    'vue/no-multiple-slot-args': ruleLevel,
-    'vue/no-required-prop-with-default': ruleLevel,
-    'vue/no-v-html': ruleLevel,
-    'vue/order-in-components': ruleLevel,
-    'vue/this-in-template': ruleLevel
+    'vue/attributes-order': 'warn',
+    'vue/block-order': 'warn',
+    'vue/no-lone-template': 'warn',
+    'vue/no-multiple-slot-args': 'warn',
+    'vue/no-required-prop-with-default': 'warn',
+    'vue/no-v-html': 'warn',
+    'vue/order-in-components': 'warn',
+    'vue/this-in-template': 'warn'
   }
 }
diff --git a/lib/configs/vue2-strongly-recommended.js b/lib/configs/vue2-strongly-recommended.js
index 47ca2ca7f..e7b0f3dc7 100644
--- a/lib/configs/vue2-strongly-recommended.js
+++ b/lib/configs/vue2-strongly-recommended.js
@@ -3,34 +3,31 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = {
   extends: require.resolve('./vue2-essential'),
   rules: {
-    'vue/attribute-hyphenation': ruleLevel,
-    'vue/component-definition-name-casing': ruleLevel,
-    'vue/first-attribute-linebreak': ruleLevel,
-    'vue/html-closing-bracket-newline': ruleLevel,
-    'vue/html-closing-bracket-spacing': ruleLevel,
-    'vue/html-end-tags': ruleLevel,
-    'vue/html-indent': ruleLevel,
-    'vue/html-quotes': ruleLevel,
-    'vue/html-self-closing': ruleLevel,
-    'vue/max-attributes-per-line': ruleLevel,
-    'vue/multiline-html-element-content-newline': ruleLevel,
-    'vue/mustache-interpolation-spacing': ruleLevel,
-    'vue/no-multi-spaces': ruleLevel,
-    'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
-    'vue/no-template-shadow': ruleLevel,
-    'vue/one-component-per-file': ruleLevel,
-    'vue/prop-name-casing': ruleLevel,
-    'vue/require-default-prop': ruleLevel,
-    'vue/require-prop-types': ruleLevel,
-    'vue/singleline-html-element-content-newline': ruleLevel,
-    'vue/v-bind-style': ruleLevel,
-    'vue/v-on-style': ruleLevel,
-    'vue/v-slot-style': ruleLevel
+    'vue/attribute-hyphenation': 'warn',
+    'vue/component-definition-name-casing': 'warn',
+    'vue/first-attribute-linebreak': 'warn',
+    'vue/html-closing-bracket-newline': 'warn',
+    'vue/html-closing-bracket-spacing': 'warn',
+    'vue/html-end-tags': 'warn',
+    'vue/html-indent': 'warn',
+    'vue/html-quotes': 'warn',
+    'vue/html-self-closing': 'warn',
+    'vue/max-attributes-per-line': 'warn',
+    'vue/multiline-html-element-content-newline': 'warn',
+    'vue/mustache-interpolation-spacing': 'warn',
+    'vue/no-multi-spaces': 'warn',
+    'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
+    'vue/no-template-shadow': 'warn',
+    'vue/one-component-per-file': 'warn',
+    'vue/prop-name-casing': 'warn',
+    'vue/require-default-prop': 'warn',
+    'vue/require-prop-types': 'warn',
+    'vue/singleline-html-element-content-newline': 'warn',
+    'vue/v-bind-style': 'warn',
+    'vue/v-on-style': 'warn',
+    'vue/v-slot-style': 'warn'
   }
 }
diff --git a/lib/configs/vue3-recommended.js b/lib/configs/vue3-recommended.js
index 1346a6da3..083f6c65b 100644
--- a/lib/configs/vue3-recommended.js
+++ b/lib/configs/vue3-recommended.js
@@ -3,19 +3,16 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = {
   extends: require.resolve('./vue3-strongly-recommended'),
   rules: {
-    'vue/attributes-order': ruleLevel,
-    'vue/block-order': ruleLevel,
-    'vue/no-lone-template': ruleLevel,
-    'vue/no-multiple-slot-args': ruleLevel,
-    'vue/no-required-prop-with-default': ruleLevel,
-    'vue/no-v-html': ruleLevel,
-    'vue/order-in-components': ruleLevel,
-    'vue/this-in-template': ruleLevel
+    'vue/attributes-order': 'warn',
+    'vue/block-order': 'warn',
+    'vue/no-lone-template': 'warn',
+    'vue/no-multiple-slot-args': 'warn',
+    'vue/no-required-prop-with-default': 'warn',
+    'vue/no-v-html': 'warn',
+    'vue/order-in-components': 'warn',
+    'vue/this-in-template': 'warn'
   }
 }
diff --git a/lib/configs/vue3-strongly-recommended.js b/lib/configs/vue3-strongly-recommended.js
index 6b984eb4f..a3f854fc4 100644
--- a/lib/configs/vue3-strongly-recommended.js
+++ b/lib/configs/vue3-strongly-recommended.js
@@ -3,42 +3,39 @@
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
  */
-const ruleLevel =
-  process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'
-
 module.exports = {
   extends: require.resolve('./vue3-essential'),
   rules: {
-    'vue/attribute-hyphenation': ruleLevel,
-    'vue/component-definition-name-casing': ruleLevel,
-    'vue/first-attribute-linebreak': ruleLevel,
-    'vue/html-closing-bracket-newline': ruleLevel,
-    'vue/html-closing-bracket-spacing': ruleLevel,
-    'vue/html-end-tags': ruleLevel,
-    'vue/html-indent': ruleLevel,
-    'vue/html-quotes': ruleLevel,
-    'vue/html-self-closing': ruleLevel,
-    'vue/max-attributes-per-line': ruleLevel,
-    'vue/multiline-html-element-content-newline': ruleLevel,
-    'vue/mustache-interpolation-spacing': ruleLevel,
-    'vue/no-multi-spaces': ruleLevel,
-    'vue/no-spaces-around-equal-signs-in-attribute': ruleLevel,
-    'vue/no-template-shadow': ruleLevel,
-    'vue/one-component-per-file': ruleLevel,
-    'vue/prop-name-casing': ruleLevel,
-    'vue/require-default-prop': ruleLevel,
-    'vue/require-explicit-emits': ruleLevel,
-    'vue/require-prop-types': ruleLevel,
-    'vue/singleline-html-element-content-newline': ruleLevel,
-    'vue/v-bind-style': ruleLevel,
+    'vue/attribute-hyphenation': 'warn',
+    'vue/component-definition-name-casing': 'warn',
+    'vue/first-attribute-linebreak': 'warn',
+    'vue/html-closing-bracket-newline': 'warn',
+    'vue/html-closing-bracket-spacing': 'warn',
+    'vue/html-end-tags': 'warn',
+    'vue/html-indent': 'warn',
+    'vue/html-quotes': 'warn',
+    'vue/html-self-closing': 'warn',
+    'vue/max-attributes-per-line': 'warn',
+    'vue/multiline-html-element-content-newline': 'warn',
+    'vue/mustache-interpolation-spacing': 'warn',
+    'vue/no-multi-spaces': 'warn',
+    'vue/no-spaces-around-equal-signs-in-attribute': 'warn',
+    'vue/no-template-shadow': 'warn',
+    'vue/one-component-per-file': 'warn',
+    'vue/prop-name-casing': 'warn',
+    'vue/require-default-prop': 'warn',
+    'vue/require-explicit-emits': 'warn',
+    'vue/require-prop-types': 'warn',
+    'vue/singleline-html-element-content-newline': 'warn',
+    'vue/v-bind-style': 'warn',
     'vue/v-on-event-hyphenation': [
-      ruleLevel,
+      'warn',
       'always',
       {
         autofix: true
       }
     ],
-    'vue/v-on-style': ruleLevel,
-    'vue/v-slot-style': ruleLevel
+    'vue/v-on-style': 'warn',
+    'vue/v-slot-style': 'warn'
   }
 }
diff --git a/tools/update-lib-configs.js b/tools/update-lib-configs.js
index d7e857e50..0c2845e45 100644
--- a/tools/update-lib-configs.js
+++ b/tools/update-lib-configs.js
@@ -44,24 +44,17 @@ function formatRules(rules, categoryId) {
       return [rule.ruleId, options]
     })
   )
-  // use the ruleLevel variable for rules set to warn so that they can
-  // be made to error with an env variable if desired
-  return JSON.stringify(obj, null, 2).replaceAll('"warn"', 'ruleLevel')
+  return JSON.stringify(obj, null, 2)
 }
 
 function formatCategory(category) {
   const extendsCategoryId = extendsCategories[category.categoryId]
-  const formattedRules = formatRules(category.rules, category.categoryId)
-  const ruleLevelVariable = formattedRules.includes('ruleLevel')
-    ? "\nconst ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'\n"
-    : ''
-
   if (extendsCategoryId == null) {
     return `/*
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
- */${ruleLevelVariable}
+ */
 module.exports = {
   parserOptions: {
     ecmaVersion: 'latest',
@@ -70,7 +63,7 @@ module.exports = {
   plugins: [
     'vue'
   ],
-  rules: ${formattedRules},
+  rules: ${formatRules(category.rules, category.categoryId)},
   overrides: [
     {
       files: '*.vue',
@@ -84,10 +77,10 @@ module.exports = {
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
- */${ruleLevelVariable}
+ */
 module.exports = {
   extends: require.resolve('./${extendsCategoryId}'),
-  rules: ${formattedRules}
+  rules: ${formatRules(category.rules, category.categoryId)}
 }
 `
 }
diff --git a/tools/update-lib-flat-configs.js b/tools/update-lib-flat-configs.js
index 6894f00d6..e55fb2d01 100644
--- a/tools/update-lib-flat-configs.js
+++ b/tools/update-lib-flat-configs.js
@@ -44,24 +44,17 @@ function formatRules(rules, categoryId) {
       return [rule.ruleId, options]
     })
   )
-  // use the ruleLevel variable for rules set to warn so that they can
-  // be made to error with an env variable if desired
-  return JSON.stringify(obj, null, 2).replaceAll('"warn"', 'ruleLevel')
+  return JSON.stringify(obj, null, 2)
 }
 
 function formatCategory(category) {
   const extendsCategoryId = extendsCategories[category.categoryId]
-  const formattedRules = formatRules(category.rules, category.categoryId)
-  const ruleLevelVariable = formattedRules.includes('ruleLevel')
-    ? "\nconst ruleLevel = process.env.VUE_ESLINT_ALWAYS_ERROR === 'true' ? 'error' : 'warn'\n"
-    : ''
-
   if (category.categoryId === 'base') {
     return `/*
  * IMPORTANT!
  * This file has been automatically generated,
  * in order to update its content execute "npm run update"
- */${ruleLevelVariable}
+ */
 module.exports = [
   {
     name: 'vue/base/setup',
@@ -86,7 +79,7 @@ module.exports = [
       parser: require('vue-eslint-parser'),
       sourceType: 'module',
     },
-    rules: ${formattedRules},
+    rules: ${formatRules(category.rules, category.categoryId)},
     processor: 'vue/vue'
   }
 ]
@@ -100,13 +93,11 @@ module.exports = [
 'use strict'
 const config = require('./${extendsCategoryId}.js')
 
-${ruleLevelVariable}
-
 module.exports = [
   ...config,
   {
     name: 'vue/${category.categoryId.replace(/^vue3-/u, '')}/rules',
-    rules: ${formattedRules},
+    rules: ${formatRules(category.rules, category.categoryId)},
   }
 ]
 `

From 3825a4016493acb5a55cdace080660e3c057814c Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Fri, 8 Aug 2025 16:15:49 +1200
Subject: [PATCH 09/10] feat: generate new error-based configs

---
 lib/configs/flat/vue2-recommended-error.js    | 24 ++++++++++
 .../flat/vue2-strongly-recommended-error.js   | 39 +++++++++++++++
 lib/configs/flat/vue3-recommended-error.js    | 24 ++++++++++
 .../flat/vue3-strongly-recommended-error.js   | 47 +++++++++++++++++++
 lib/configs/vue2-recommended-error.js         | 18 +++++++
 .../vue2-strongly-recommended-error.js        | 33 +++++++++++++
 lib/configs/vue3-recommended-error.js         | 18 +++++++
 .../vue3-strongly-recommended-error.js        | 41 ++++++++++++++++
 tools/update-lib-configs.js                   | 32 ++++++++++---
 tools/update-lib-flat-configs.js              | 34 +++++++++++---
 10 files changed, 298 insertions(+), 12 deletions(-)
 create mode 100644 lib/configs/flat/vue2-recommended-error.js
 create mode 100644 lib/configs/flat/vue2-strongly-recommended-error.js
 create mode 100644 lib/configs/flat/vue3-recommended-error.js
 create mode 100644 lib/configs/flat/vue3-strongly-recommended-error.js
 create mode 100644 lib/configs/vue2-recommended-error.js
 create mode 100644 lib/configs/vue2-strongly-recommended-error.js
 create mode 100644 lib/configs/vue3-recommended-error.js
 create mode 100644 lib/configs/vue3-strongly-recommended-error.js

diff --git a/lib/configs/flat/vue2-recommended-error.js b/lib/configs/flat/vue2-recommended-error.js
new file mode 100644
index 000000000..f9bc69c0a
--- /dev/null
+++ b/lib/configs/flat/vue2-recommended-error.js
@@ -0,0 +1,24 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+'use strict'
+const config = require('./vue2-strongly-recommended-error.js')
+
+module.exports = [
+  ...config,
+  {
+    name: 'vue/vue2-recommended/rules',
+    rules: {
+      'vue/attributes-order': 'error',
+      'vue/block-order': 'error',
+      'vue/no-lone-template': 'error',
+      'vue/no-multiple-slot-args': 'error',
+      'vue/no-required-prop-with-default': 'error',
+      'vue/no-v-html': 'error',
+      'vue/order-in-components': 'error',
+      'vue/this-in-template': 'error'
+    }
+  }
+]
diff --git a/lib/configs/flat/vue2-strongly-recommended-error.js b/lib/configs/flat/vue2-strongly-recommended-error.js
new file mode 100644
index 000000000..176afa681
--- /dev/null
+++ b/lib/configs/flat/vue2-strongly-recommended-error.js
@@ -0,0 +1,39 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+'use strict'
+const config = require('./vue2-essential.js')
+
+module.exports = [
+  ...config,
+  {
+    name: 'vue/vue2-strongly-recommended/rules',
+    rules: {
+      'vue/attribute-hyphenation': 'error',
+      'vue/component-definition-name-casing': 'error',
+      'vue/first-attribute-linebreak': 'error',
+      'vue/html-closing-bracket-newline': 'error',
+      'vue/html-closing-bracket-spacing': 'error',
+      'vue/html-end-tags': 'error',
+      'vue/html-indent': 'error',
+      'vue/html-quotes': 'error',
+      'vue/html-self-closing': 'error',
+      'vue/max-attributes-per-line': 'error',
+      'vue/multiline-html-element-content-newline': 'error',
+      'vue/mustache-interpolation-spacing': 'error',
+      'vue/no-multi-spaces': 'error',
+      'vue/no-spaces-around-equal-signs-in-attribute': 'error',
+      'vue/no-template-shadow': 'error',
+      'vue/one-component-per-file': 'error',
+      'vue/prop-name-casing': 'error',
+      'vue/require-default-prop': 'error',
+      'vue/require-prop-types': 'error',
+      'vue/singleline-html-element-content-newline': 'error',
+      'vue/v-bind-style': 'error',
+      'vue/v-on-style': 'error',
+      'vue/v-slot-style': 'error'
+    }
+  }
+]
diff --git a/lib/configs/flat/vue3-recommended-error.js b/lib/configs/flat/vue3-recommended-error.js
new file mode 100644
index 000000000..232e6b838
--- /dev/null
+++ b/lib/configs/flat/vue3-recommended-error.js
@@ -0,0 +1,24 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+'use strict'
+const config = require('./vue3-strongly-recommended-error.js')
+
+module.exports = [
+  ...config,
+  {
+    name: 'vue/recommended/rules',
+    rules: {
+      'vue/attributes-order': 'error',
+      'vue/block-order': 'error',
+      'vue/no-lone-template': 'error',
+      'vue/no-multiple-slot-args': 'error',
+      'vue/no-required-prop-with-default': 'error',
+      'vue/no-v-html': 'error',
+      'vue/order-in-components': 'error',
+      'vue/this-in-template': 'error'
+    }
+  }
+]
diff --git a/lib/configs/flat/vue3-strongly-recommended-error.js b/lib/configs/flat/vue3-strongly-recommended-error.js
new file mode 100644
index 000000000..883fc5501
--- /dev/null
+++ b/lib/configs/flat/vue3-strongly-recommended-error.js
@@ -0,0 +1,47 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+'use strict'
+const config = require('./vue3-essential.js')
+
+module.exports = [
+  ...config,
+  {
+    name: 'vue/strongly-recommended/rules',
+    rules: {
+      'vue/attribute-hyphenation': 'error',
+      'vue/component-definition-name-casing': 'error',
+      'vue/first-attribute-linebreak': 'error',
+      'vue/html-closing-bracket-newline': 'error',
+      'vue/html-closing-bracket-spacing': 'error',
+      'vue/html-end-tags': 'error',
+      'vue/html-indent': 'error',
+      'vue/html-quotes': 'error',
+      'vue/html-self-closing': 'error',
+      'vue/max-attributes-per-line': 'error',
+      'vue/multiline-html-element-content-newline': 'error',
+      'vue/mustache-interpolation-spacing': 'error',
+      'vue/no-multi-spaces': 'error',
+      'vue/no-spaces-around-equal-signs-in-attribute': 'error',
+      'vue/no-template-shadow': 'error',
+      'vue/one-component-per-file': 'error',
+      'vue/prop-name-casing': 'error',
+      'vue/require-default-prop': 'error',
+      'vue/require-explicit-emits': 'error',
+      'vue/require-prop-types': 'error',
+      'vue/singleline-html-element-content-newline': 'error',
+      'vue/v-bind-style': 'error',
+      'vue/v-on-event-hyphenation': [
+        'error',
+        'always',
+        {
+          autofix: true
+        }
+      ],
+      'vue/v-on-style': 'error',
+      'vue/v-slot-style': 'error'
+    }
+  }
+]
diff --git a/lib/configs/vue2-recommended-error.js b/lib/configs/vue2-recommended-error.js
new file mode 100644
index 000000000..eb7c624fd
--- /dev/null
+++ b/lib/configs/vue2-recommended-error.js
@@ -0,0 +1,18 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+module.exports = {
+  extends: require.resolve('./vue2-strongly-recommended-error'),
+  rules: {
+    'vue/attributes-order': 'error',
+    'vue/block-order': 'error',
+    'vue/no-lone-template': 'error',
+    'vue/no-multiple-slot-args': 'error',
+    'vue/no-required-prop-with-default': 'error',
+    'vue/no-v-html': 'error',
+    'vue/order-in-components': 'error',
+    'vue/this-in-template': 'error'
+  }
+}
diff --git a/lib/configs/vue2-strongly-recommended-error.js b/lib/configs/vue2-strongly-recommended-error.js
new file mode 100644
index 000000000..482914c8c
--- /dev/null
+++ b/lib/configs/vue2-strongly-recommended-error.js
@@ -0,0 +1,33 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+module.exports = {
+  extends: require.resolve('./vue2-essential'),
+  rules: {
+    'vue/attribute-hyphenation': 'error',
+    'vue/component-definition-name-casing': 'error',
+    'vue/first-attribute-linebreak': 'error',
+    'vue/html-closing-bracket-newline': 'error',
+    'vue/html-closing-bracket-spacing': 'error',
+    'vue/html-end-tags': 'error',
+    'vue/html-indent': 'error',
+    'vue/html-quotes': 'error',
+    'vue/html-self-closing': 'error',
+    'vue/max-attributes-per-line': 'error',
+    'vue/multiline-html-element-content-newline': 'error',
+    'vue/mustache-interpolation-spacing': 'error',
+    'vue/no-multi-spaces': 'error',
+    'vue/no-spaces-around-equal-signs-in-attribute': 'error',
+    'vue/no-template-shadow': 'error',
+    'vue/one-component-per-file': 'error',
+    'vue/prop-name-casing': 'error',
+    'vue/require-default-prop': 'error',
+    'vue/require-prop-types': 'error',
+    'vue/singleline-html-element-content-newline': 'error',
+    'vue/v-bind-style': 'error',
+    'vue/v-on-style': 'error',
+    'vue/v-slot-style': 'error'
+  }
+}
diff --git a/lib/configs/vue3-recommended-error.js b/lib/configs/vue3-recommended-error.js
new file mode 100644
index 000000000..23a3c21a2
--- /dev/null
+++ b/lib/configs/vue3-recommended-error.js
@@ -0,0 +1,18 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+module.exports = {
+  extends: require.resolve('./vue3-strongly-recommended-error'),
+  rules: {
+    'vue/attributes-order': 'error',
+    'vue/block-order': 'error',
+    'vue/no-lone-template': 'error',
+    'vue/no-multiple-slot-args': 'error',
+    'vue/no-required-prop-with-default': 'error',
+    'vue/no-v-html': 'error',
+    'vue/order-in-components': 'error',
+    'vue/this-in-template': 'error'
+  }
+}
diff --git a/lib/configs/vue3-strongly-recommended-error.js b/lib/configs/vue3-strongly-recommended-error.js
new file mode 100644
index 000000000..b48e0deec
--- /dev/null
+++ b/lib/configs/vue3-strongly-recommended-error.js
@@ -0,0 +1,41 @@
+/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run update"
+ */
+module.exports = {
+  extends: require.resolve('./vue3-essential'),
+  rules: {
+    'vue/attribute-hyphenation': 'error',
+    'vue/component-definition-name-casing': 'error',
+    'vue/first-attribute-linebreak': 'error',
+    'vue/html-closing-bracket-newline': 'error',
+    'vue/html-closing-bracket-spacing': 'error',
+    'vue/html-end-tags': 'error',
+    'vue/html-indent': 'error',
+    'vue/html-quotes': 'error',
+    'vue/html-self-closing': 'error',
+    'vue/max-attributes-per-line': 'error',
+    'vue/multiline-html-element-content-newline': 'error',
+    'vue/mustache-interpolation-spacing': 'error',
+    'vue/no-multi-spaces': 'error',
+    'vue/no-spaces-around-equal-signs-in-attribute': 'error',
+    'vue/no-template-shadow': 'error',
+    'vue/one-component-per-file': 'error',
+    'vue/prop-name-casing': 'error',
+    'vue/require-default-prop': 'error',
+    'vue/require-explicit-emits': 'error',
+    'vue/require-prop-types': 'error',
+    'vue/singleline-html-element-content-newline': 'error',
+    'vue/v-bind-style': 'error',
+    'vue/v-on-event-hyphenation': [
+      'error',
+      'always',
+      {
+        autofix: true
+      }
+    ],
+    'vue/v-on-style': 'error',
+    'vue/v-slot-style': 'error'
+  }
+}
diff --git a/tools/update-lib-configs.js b/tools/update-lib-configs.js
index 0c2845e45..a97f19cd2 100644
--- a/tools/update-lib-configs.js
+++ b/tools/update-lib-configs.js
@@ -28,10 +28,11 @@ const extendsCategories = {
   'vue3-use-with-caution': 'vue3-recommended'
 }
 
-function formatRules(rules, categoryId) {
+function formatRules(rules, categoryId, alwaysError) {
   const obj = Object.fromEntries(
     rules.map((rule) => {
-      let options = errorCategories.has(categoryId) ? 'error' : 'warn'
+      let options =
+        alwaysError || errorCategories.has(categoryId) ? 'error' : 'warn'
       const defaultOptions =
         rule.meta && rule.meta.docs && rule.meta.docs.defaultOptions
       if (defaultOptions) {
@@ -47,8 +48,16 @@ function formatRules(rules, categoryId) {
   return JSON.stringify(obj, null, 2)
 }
 
-function formatCategory(category) {
-  const extendsCategoryId = extendsCategories[category.categoryId]
+function hasWarningRules(categoryId) {
+  return (
+    categoryId !== 'base' &&
+    categoryId !== 'vue3-essential' &&
+    categoryId !== 'vue2-essential'
+  )
+}
+
+function formatCategory(category, alwaysError = false) {
+  let extendsCategoryId = extendsCategories[category.categoryId]
   if (extendsCategoryId == null) {
     return `/*
  * IMPORTANT!
@@ -63,7 +72,7 @@ module.exports = {
   plugins: [
     'vue'
   ],
-  rules: ${formatRules(category.rules, category.categoryId)},
+  rules: ${formatRules(category.rules, category.categoryId, alwaysError)},
   overrides: [
     {
       files: '*.vue',
@@ -73,6 +82,10 @@ module.exports = {
 }
 `
   }
+  if (alwaysError && hasWarningRules(extendsCategoryId)) {
+    extendsCategoryId += '-error'
+  }
+
   return `/*
  * IMPORTANT!
  * This file has been automatically generated,
@@ -80,7 +93,7 @@ module.exports = {
  */
 module.exports = {
   extends: require.resolve('./${extendsCategoryId}'),
-  rules: ${formatRules(category.rules, category.categoryId)}
+  rules: ${formatRules(category.rules, category.categoryId, alwaysError)}
 }
 `
 }
@@ -92,6 +105,13 @@ for (const category of categories) {
   const content = formatCategory(category)
 
   fs.writeFileSync(filePath, content)
+
+  if (hasWarningRules(category.categoryId)) {
+    fs.writeFileSync(
+      path.join(ROOT, `${category.categoryId}-error.js`),
+      formatCategory(category, true)
+    )
+  }
 }
 
 // Format files.
diff --git a/tools/update-lib-flat-configs.js b/tools/update-lib-flat-configs.js
index e55fb2d01..619f72653 100644
--- a/tools/update-lib-flat-configs.js
+++ b/tools/update-lib-flat-configs.js
@@ -28,10 +28,11 @@ const extendsCategories = {
   'vue3-use-with-caution': 'vue3-recommended'
 }
 
-function formatRules(rules, categoryId) {
+function formatRules(rules, categoryId, alwaysError) {
   const obj = Object.fromEntries(
     rules.map((rule) => {
-      let options = errorCategories.has(categoryId) ? 'error' : 'warn'
+      let options =
+        alwaysError || errorCategories.has(categoryId) ? 'error' : 'warn'
       const defaultOptions =
         rule.meta && rule.meta.docs && rule.meta.docs.defaultOptions
       if (defaultOptions) {
@@ -47,8 +48,17 @@ function formatRules(rules, categoryId) {
   return JSON.stringify(obj, null, 2)
 }
 
-function formatCategory(category) {
-  const extendsCategoryId = extendsCategories[category.categoryId]
+function hasWarningRules(categoryId) {
+  return (
+    categoryId !== 'base' &&
+    categoryId !== 'vue3-essential' &&
+    categoryId !== 'vue2-essential'
+  )
+}
+
+function formatCategory(category, alwaysError = false) {
+  let extendsCategoryId = extendsCategories[category.categoryId]
+
   if (category.categoryId === 'base') {
     return `/*
  * IMPORTANT!
@@ -79,12 +89,17 @@ module.exports = [
       parser: require('vue-eslint-parser'),
       sourceType: 'module',
     },
-    rules: ${formatRules(category.rules, category.categoryId)},
+    rules: ${formatRules(category.rules, category.categoryId, alwaysError)},
     processor: 'vue/vue'
   }
 ]
 `
   }
+
+  if (alwaysError && hasWarningRules(extendsCategoryId)) {
+    extendsCategoryId += '-error'
+  }
+
   return `/*
  * IMPORTANT!
  * This file has been automatically generated,
@@ -97,7 +112,7 @@ module.exports = [
   ...config,
   {
     name: 'vue/${category.categoryId.replace(/^vue3-/u, '')}/rules',
-    rules: ${formatRules(category.rules, category.categoryId)},
+    rules: ${formatRules(category.rules, category.categoryId, alwaysError)},
   }
 ]
 `
@@ -110,6 +125,13 @@ for (const category of categories) {
   const content = formatCategory(category)
 
   fs.writeFileSync(filePath, content)
+
+  if (hasWarningRules(category.categoryId)) {
+    fs.writeFileSync(
+      path.join(ROOT, `${category.categoryId}-error.js`),
+      formatCategory(category, true)
+    )
+  }
 }
 
 // Format files.

From 168cf660a88bc51b1e92049cf6e5ac439336fbde Mon Sep 17 00:00:00 2001
From: Gareth Jones <3151613+G-Rath@users.noreply.github.com>
Date: Fri, 8 Aug 2025 16:32:36 +1200
Subject: [PATCH 10/10] docs: update documentation

---
 docs/user-guide/index.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docs/user-guide/index.md b/docs/user-guide/index.md
index 103471f61..85acc40b9 100644
--- a/docs/user-guide/index.md
+++ b/docs/user-guide/index.md
@@ -187,14 +187,20 @@ You can use the following configs by adding them to `extends`.
 - Configurations for using Vue.js 3.x:
   - `"plugin:vue/essential"` ... `base`, plus rules to prevent errors or unintended behavior.
   - `"plugin:vue/strongly-recommended"` ... Above, plus rules to considerably improve code readability and/or dev experience.
+  - `"plugin:vue/strongly-recommended-error"` ... Above, except with all rules configured to error instead of warn.
   - `"plugin:vue/recommended"` ... Above, plus rules to enforce subjective community defaults to ensure consistency.
+  - `"plugin:vue/recommended-error"` ... Above, except with all rules configured to error instead of warn.
 - Configurations for using Vue.js 2.x:
   - `"plugin:vue/vue2-essential"` ... `base`, plus rules to prevent errors or unintended behavior.
   - `"plugin:vue/vue2-strongly-recommended"` ... Above, plus rules to considerably improve code readability and/or dev experience.
+  - `"plugin:vue/vue2-strongly-recommended-error"` ... Above, except with all rules configured to error instead of warn.
   - `"plugin:vue/vue2-recommended"` ... Above, plus rules to enforce subjective community defaults to ensure consistency.
+  - `"plugin:vue/vue2-recommended-error"` ... Above, except with all rules configured to error instead of warn.
 
 :::warning Reporting rules
 By default, all rules from **base** and **essential** categories report ESLint errors. Other rules - because they're not covering potential bugs in the application - report warnings. What does it mean? By default - nothing, but if you want - you can set up a threshold and break the build after a certain amount of warnings, instead of any. More information [here](https://eslint.org/docs/user-guide/command-line-interface#handling-warnings).
+
+Alternatively, there are versions of the configs with all rules set to error suffixed with `-error` that you can use.
 :::
 
 :::warning Status of Vue.js 3.x supports