diff --git a/apps/oxlint/src-js/package/compat.ts b/apps/oxlint/src-js/package/compat.ts
new file mode 100644
index 0000000000000..b66180f2be2b2
--- /dev/null
+++ b/apps/oxlint/src-js/package/compat.ts
@@ -0,0 +1,217 @@
+/*
+ * `eslintCompatPlugin` function.
+ * Converts an Oxlint plugin using `createOnce` to a plugin which will run in ESLint.
+ */
+
+import { debugAssertIsNonNull } from "../utils/asserts.ts";
+
+import type { Context, FileContext, LanguageOptions } from "../plugins/context.ts";
+import type { CreateOnceRule, Plugin, Rule } from "../plugins/load.ts";
+import type { Settings } from "../plugins/settings.ts";
+import type { SourceCode } from "../plugins/source_code.ts";
+import type { BeforeHook, Visitor, VisitorWithHooks } from "../plugins/types.ts";
+import type { SetNullable } from "../utils/types.ts";
+
+// Empty visitor object, returned by `create` when `before` hook returns `false`.
+const EMPTY_VISITOR: Visitor = {};
+
+/**
+ * Convert a plugin which used Oxlint's `createOnce` API to also work with ESLint.
+ *
+ * If any of the plugin's rules use the Oxlint alternative `createOnce` API,
+ * add ESLint-compatible `create` methods to those rules, which delegate to `createOnce`.
+ * This makes the plugin compatible with ESLint.
+ *
+ * The `plugin` object passed in is mutated in-place.
+ *
+ * @param plugin - Plugin to convert
+ * @returns Plugin with all rules having `create` method
+ * @throws {Error} If `plugin` is not an object, or `plugin.rules` is not an object
+ */
+export function eslintCompatPlugin(plugin: Plugin): Plugin {
+  // Validate type of `plugin`
+  if (plugin === null || typeof plugin !== "object") throw new Error("Plugin must be an object");
+
+  const { rules } = plugin;
+  if (rules === null || typeof rules !== "object") {
+    throw new Error("Plugin must have an object as `rules` property");
+  }
+
+  // Make each rule in the plugin ESLint-compatible by calling `convertRule` on it
+  for (const ruleName in rules) {
+    if (Object.hasOwn(rules, ruleName)) convertRule(rules[ruleName]);
+  }
+
+  return plugin;
+}
+
+/**
+ * Convert a rule.
+ *
+ * The `rule` object passed in is mutated in-place.
+ *
+ * @param rule - Rule to convert
+ * @throws {Error} If `rule` is not an object
+ */
+function convertRule(rule: Rule) {
+  // Validate type of `rule`
+  if (rule === null || typeof rule !== "object") throw new Error("Rule must be an object");
+
+  // If rule already has `create` method, no need to convert
+  if ("create" in rule) return;
+
+  // Add `create` function to `rule`
+  let context: Context | null = null,
+    visitor: Visitor | undefined,
+    beforeHook: BeforeHook | null;
+
+  rule.create = (eslintContext) => {
+    // Lazily call `createOnce` on first invocation of `create`
+    if (context === null) {
+      ({ context, visitor, beforeHook } = createContextAndVisitor(rule));
+    }
+    debugAssertIsNonNull(visitor);
+
+    // Copy properties from ESLint's context object to `context`.
+    // ESLint's context object is an object of form `{ id, options, report }`, with all other properties
+    // and methods on another object which is its prototype.
+    Object.defineProperties(context, {
+      id: { value: eslintContext.id },
+      options: { value: eslintContext.options },
+      report: { value: eslintContext.report },
+    });
+    Object.setPrototypeOf(context, Object.getPrototypeOf(eslintContext));
+
+    // If `before` hook returns `false`, skip traversal by returning an empty object as visitor
+    if (beforeHook !== null) {
+      const shouldRun = beforeHook();
+      if (shouldRun === false) return EMPTY_VISITOR;
+    }
+
+    // Return same visitor each time
+    return visitor;
+  };
+}
+
+// File context object. Used as prototype for `Context` objects for each rule during `createOnce` call.
+// When running the rules, ESLint's `context` object's prototype is switched in as prototype for `Context` objects.
+//
+// Only `extends` method is available in `createOnce`, so only that is implemented here.
+// All other getters/methods throw, same as they do in main implementation.
+//
+// See `FILE_CONTEXT` in `plugins/context.ts` for details of all the getters/methods.
+const FILE_CONTEXT: FileContext = Object.freeze({
+  get filename(): string {
+    throw new Error("Cannot access `context.filename` in `createOnce`");
+  },
+
+  getFilename(): string {
+    throw new Error("Cannot call `context.getFilename` in `createOnce`");
+  },
+
+  get physicalFilename(): string {
+    throw new Error("Cannot access `context.physicalFilename` in `createOnce`");
+  },
+
+  getPhysicalFilename(): string {
+    throw new Error("Cannot call `context.getPhysicalFilename` in `createOnce`");
+  },
+
+  get cwd(): string {
+    throw new Error("Cannot access `context.cwd` in `createOnce`");
+  },
+
+  getCwd(): string {
+    throw new Error("Cannot call `context.getCwd` in `createOnce`");
+  },
+
+  get sourceCode(): SourceCode {
+    throw new Error("Cannot access `context.sourceCode` in `createOnce`");
+  },
+
+  getSourceCode(): SourceCode {
+    throw new Error("Cannot call `context.getSourceCode` in `createOnce`");
+  },
+
+  get languageOptions(): LanguageOptions {
+    throw new Error("Cannot access `context.languageOptions` in `createOnce`");
+  },
+
+  get settings(): Readonly<Settings> {
+    throw new Error("Cannot access `context.settings` in `createOnce`");
+  },
+
+  extend(this: FileContext, extension: Record<string | number | symbol, unknown>): FileContext {
+    // Note: We can allow calling `extend` in `createOnce`, as it involves no file-specific state
+    return Object.freeze(Object.assign(Object.create(this), extension));
+  },
+
+  get parserOptions(): Record<string, unknown> {
+    throw new Error("Cannot access `context.parserOptions` in `createOnce`");
+  },
+
+  get parserPath(): string | undefined {
+    throw new Error("Cannot access `context.parserPath` in `createOnce`");
+  },
+});
+
+/**
+ * Call `createOnce` method of rule, and return `Context`, `Visitor`, and `beforeHook` (if any).
+ *
+ * @param rule - Rule with `createOnce` method
+ * @returns Object with `context`, `visitor`, and `beforeHook` properties
+ */
+function createContextAndVisitor(rule: CreateOnceRule): {
+  context: Context;
+  visitor: Visitor;
+  beforeHook: BeforeHook | null;
+} {
+  // Validate type of `createOnce`
+  const { createOnce } = rule;
+  if (createOnce == null) {
+    throw new Error("Rules must define either a `create` or `createOnce` method");
+  }
+  if (typeof createOnce !== "function") {
+    throw new Error("Rule `createOnce` property must be a function");
+  }
+
+  // Call `createOnce` with empty context object.
+  // Really, accessing `options` or calling `report` should throw, because they're illegal in `createOnce`.
+  // But any such bugs should have been caught when testing the rule in Oxlint, so should be OK to take this shortcut.
+  // `FILE_CONTEXT` prototype provides `extends` method, which is available in `createOnce`.
+  const context: Context = Object.create(FILE_CONTEXT, {
+    id: { value: "", enumerable: true, configurable: true },
+    options: { value: null, enumerable: true, configurable: true },
+    report: { value: null, enumerable: true, configurable: true },
+  });
+
+  let {
+    before: beforeHook,
+    after: afterHook,
+    ...visitor
+  } = createOnce.call(rule, context) as SetNullable<VisitorWithHooks, "before" | "after">;
+
+  if (beforeHook === undefined) {
+    beforeHook = null;
+  } else if (beforeHook !== null && typeof beforeHook !== "function") {
+    throw new Error("`before` property of visitor must be a function if defined");
+  }
+
+  // Add `after` hook to `Program:exit` visit fn
+  if (afterHook != null) {
+    if (typeof afterHook !== "function") {
+      throw new Error("`after` property of visitor must be a function if defined");
+    }
+
+    const programExit = visitor["Program:exit"];
+    visitor["Program:exit"] =
+      programExit == null
+        ? (_node) => afterHook()
+        : (node) => {
+            programExit(node);
+            afterHook();
+          };
+  }
+
+  return { context, visitor, beforeHook };
+}
diff --git a/apps/oxlint/src-js/package/define.ts b/apps/oxlint/src-js/package/define.ts
index ab935013e23fe..d3fe2e7965879 100644
--- a/apps/oxlint/src-js/package/define.ts
+++ b/apps/oxlint/src-js/package/define.ts
@@ -2,224 +2,28 @@
  * `definePlugin` and `defineRule` functions.
  */
 
-import { debugAssertIsNonNull } from "../utils/asserts.ts";
-
-import type { Context, FileContext, LanguageOptions } from "../plugins/context.ts";
-import type { CreateOnceRule, Plugin, Rule } from "../plugins/load.ts";
-import type { Settings } from "../plugins/settings.ts";
-import type { SourceCode } from "../plugins/source_code.ts";
-import type { BeforeHook, Visitor, VisitorWithHooks } from "../plugins/types.ts";
-import type { SetNullable } from "../utils/types.ts";
-
-// Empty visitor object, returned by `create` when `before` hook returns `false`.
-const EMPTY_VISITOR: Visitor = {};
+import type { Plugin, Rule } from "../plugins/load.ts";
 
 /**
  * Define a plugin.
  *
- * If any of the plugin's rules use the Oxlint alternative `createOnce` API,
- * add ESLint-compatible `create` methods to those rules, which delegate to `createOnce`.
- * This makes the plugin compatible with ESLint.
- *
- * The `plugin` object passed in is mutated in-place.
+ * No-op function, just to provide type safety. Input is passed through unchanged.
  *
  * @param plugin - Plugin to define
- * @returns Plugin with all rules having `create` method
- * @throws {Error} If `plugin` is not an object, or `plugin.rules` is not an object
+ * @returns Same plugin as passed in
  */
 export function definePlugin(plugin: Plugin): Plugin {
-  // Validate type of `plugin`
-  if (plugin === null || typeof plugin !== "object") throw new Error("Plugin must be an object");
-
-  const { rules } = plugin;
-  if (rules === null || typeof rules !== "object") {
-    throw new Error("Plugin must have an object as `rules` property");
-  }
-
-  // Make each rule in the plugin ESLint-compatible by calling `defineRule` on it
-  for (const ruleName in rules) {
-    if (Object.hasOwn(rules, ruleName)) {
-      rules[ruleName] = defineRule(rules[ruleName]);
-    }
-  }
-
   return plugin;
 }
 
 /**
  * Define a rule.
  *
- * If `rule` uses the Oxlint alternative `createOnce` API, add an ESLint-compatible
- * `create` method to the rule, which delegates to `createOnce`.
- * This makes the rule compatible with ESLint.
- *
- * The `rule` object passed in is mutated in-place.
+ * No-op function, just to provide type safety. Input is passed through unchanged.
  *
  * @param rule - Rule to define
- * @returns Rule with `create` method
- * @throws {Error} If `rule` is not an object
+ * @returns Same rule as passed in
  */
 export function defineRule(rule: Rule): Rule {
-  // Validate type of `rule`
-  if (rule === null || typeof rule !== "object") throw new Error("Rule must be an object");
-
-  // If rule already has `create` method, return it as is
-  if ("create" in rule) return rule;
-
-  // Add `create` function to `rule`
-  let context: Context | null = null,
-    visitor: Visitor | undefined,
-    beforeHook: BeforeHook | null;
-
-  rule.create = (eslintContext) => {
-    // Lazily call `createOnce` on first invocation of `create`
-    if (context === null) {
-      ({ context, visitor, beforeHook } = createContextAndVisitor(rule));
-    }
-    debugAssertIsNonNull(visitor);
-
-    // Copy properties from ESLint's context object to `context`.
-    // ESLint's context object is an object of form `{ id, options, report }`, with all other properties
-    // and methods on another object which is its prototype.
-    Object.defineProperties(context, {
-      id: { value: eslintContext.id },
-      options: { value: eslintContext.options },
-      report: { value: eslintContext.report },
-    });
-    Object.setPrototypeOf(context, Object.getPrototypeOf(eslintContext));
-
-    // If `before` hook returns `false`, skip traversal by returning an empty object as visitor
-    if (beforeHook !== null) {
-      const shouldRun = beforeHook();
-      if (shouldRun === false) return EMPTY_VISITOR;
-    }
-
-    // Return same visitor each time
-    return visitor;
-  };
-
   return rule;
 }
-
-// File context object. Used as prototype for `Context` objects for each rule during `createOnce` call.
-// When running the rules, ESLint's `context` object is switching in as prototype for `Context` objects.
-//
-// Only `extends` method is available in `createOnce`, so only that is implemented here.
-// All other getters/methods throw, same as they do in main implementation.
-//
-// See `FILE_CONTEXT` in `plugins/context.ts` for details of all the getters/methods.
-const FILE_CONTEXT: FileContext = Object.freeze({
-  get filename(): string {
-    throw new Error("Cannot access `context.filename` in `createOnce`");
-  },
-
-  getFilename(): string {
-    throw new Error("Cannot call `context.getFilename` in `createOnce`");
-  },
-
-  get physicalFilename(): string {
-    throw new Error("Cannot access `context.physicalFilename` in `createOnce`");
-  },
-
-  getPhysicalFilename(): string {
-    throw new Error("Cannot call `context.getPhysicalFilename` in `createOnce`");
-  },
-
-  get cwd(): string {
-    throw new Error("Cannot access `context.cwd` in `createOnce`");
-  },
-
-  getCwd(): string {
-    throw new Error("Cannot call `context.getCwd` in `createOnce`");
-  },
-
-  get sourceCode(): SourceCode {
-    throw new Error("Cannot access `context.sourceCode` in `createOnce`");
-  },
-
-  getSourceCode(): SourceCode {
-    throw new Error("Cannot call `context.getSourceCode` in `createOnce`");
-  },
-
-  get languageOptions(): LanguageOptions {
-    throw new Error("Cannot access `context.languageOptions` in `createOnce`");
-  },
-
-  get settings(): Readonly<Settings> {
-    throw new Error("Cannot access `context.settings` in `createOnce`");
-  },
-
-  extend(this: FileContext, extension: Record<string | number | symbol, unknown>): FileContext {
-    // Note: We can allow calling `extend` in `createOnce`, as it involves no file-specific state
-    return Object.freeze(Object.assign(Object.create(this), extension));
-  },
-
-  get parserOptions(): Record<string, unknown> {
-    throw new Error("Cannot access `context.parserOptions` in `createOnce`");
-  },
-
-  get parserPath(): string | undefined {
-    throw new Error("Cannot access `context.parserPath` in `createOnce`");
-  },
-});
-
-/**
- * Call `createOnce` method of rule, and return `Context`, `Visitor`, and `beforeHook` (if any).
- *
- * @param rule - Rule with `createOnce` method
- * @returns Object with `context`, `visitor`, and `beforeHook` properties
- */
-function createContextAndVisitor(rule: CreateOnceRule): {
-  context: Context;
-  visitor: Visitor;
-  beforeHook: BeforeHook | null;
-} {
-  // Validate type of `createOnce`
-  const { createOnce } = rule;
-  if (createOnce == null) {
-    throw new Error("Rules must define either a `create` or `createOnce` method");
-  }
-  if (typeof createOnce !== "function") {
-    throw new Error("Rule `createOnce` property must be a function");
-  }
-
-  // Call `createOnce` with empty context object.
-  // Really, accessing `options` or calling `report` should throw, because they're illegal in `createOnce`.
-  // But any such bugs should have been caught when testing the rule in Oxlint, so should be OK to take this shortcut.
-  // `FILE_CONTEXT` prototype provides `extends` method, which is available in `createOnce`.
-  const context: Context = Object.create(FILE_CONTEXT, {
-    id: { value: "", enumerable: true, configurable: true },
-    options: { value: null, enumerable: true, configurable: true },
-    report: { value: null, enumerable: true, configurable: true },
-  });
-
-  let {
-    before: beforeHook,
-    after: afterHook,
-    ...visitor
-  } = createOnce.call(rule, context) as SetNullable<VisitorWithHooks, "before" | "after">;
-
-  if (beforeHook === undefined) {
-    beforeHook = null;
-  } else if (beforeHook !== null && typeof beforeHook !== "function") {
-    throw new Error("`before` property of visitor must be a function if defined");
-  }
-
-  // Add `after` hook to `Program:exit` visit fn
-  if (afterHook != null) {
-    if (typeof afterHook !== "function") {
-      throw new Error("`after` property of visitor must be a function if defined");
-    }
-
-    const programExit = visitor["Program:exit"];
-    visitor["Program:exit"] =
-      programExit == null
-        ? (_node) => afterHook()
-        : (node) => {
-            programExit(node);
-            afterHook();
-          };
-  }
-
-  return { context, visitor, beforeHook };
-}
diff --git a/apps/oxlint/src-js/plugin.ts b/apps/oxlint/src-js/plugin.ts
index 4440e22a442ed..b0c267a84df30 100644
--- a/apps/oxlint/src-js/plugin.ts
+++ b/apps/oxlint/src-js/plugin.ts
@@ -1,5 +1,6 @@
-// Entry point for definePlugin and defineRule
+// Re-export `definePlugin`, `defineRule`, and `eslintCompatPlugin` functions
 export { definePlugin, defineRule } from "./package/define.ts";
+export { eslintCompatPlugin } from "./package/compat.ts";
 
 // ESTree types
 export type * as ESTree from "./generated/types.d.ts";
diff --git a/apps/oxlint/src-js/plugins/load.ts b/apps/oxlint/src-js/plugins/load.ts
index 92a6c4e098bcb..cb09995bec2cb 100644
--- a/apps/oxlint/src-js/plugins/load.ts
+++ b/apps/oxlint/src-js/plugins/load.ts
@@ -29,7 +29,7 @@ export interface Plugin {
  * If `createOnce` method is present, `create` is ignored.
  *
  * If defining the rule with `createOnce`, and you want the rule to work with ESLint too,
- * you need to wrap the rule with `defineRule`.
+ * you need to wrap the plugin containing the rule with `eslintCompatPlugin`.
  */
 export type Rule = CreateRule | CreateOnceRule;
 
diff --git a/apps/oxlint/test/fixtures/definePlugin/.oxlintrc.json b/apps/oxlint/test/fixtures/definePlugin/.oxlintrc.json
index 8efed9986574e..645c7ec9a8dcf 100644
--- a/apps/oxlint/test/fixtures/definePlugin/.oxlintrc.json
+++ b/apps/oxlint/test/fixtures/definePlugin/.oxlintrc.json
@@ -3,11 +3,6 @@
   "categories": { "correctness": "off" },
   "rules": {
     "define-plugin-plugin/create": "error",
-    "define-plugin-plugin/create-once": "error",
-    "define-plugin-plugin/create-once-before-false": "error",
-    "define-plugin-plugin/create-once-before-only": "error",
-    "define-plugin-plugin/create-once-after-only": "error",
-    "define-plugin-plugin/create-once-hooks-only": "error",
-    "define-plugin-plugin/create-once-no-hooks": "error"
+    "define-plugin-plugin/create-once": "error"
   }
 }
diff --git a/apps/oxlint/test/fixtures/definePlugin/eslint.config.js b/apps/oxlint/test/fixtures/definePlugin/eslint.config.js
deleted file mode 100644
index 3546931bab668..0000000000000
--- a/apps/oxlint/test/fixtures/definePlugin/eslint.config.js
+++ /dev/null
@@ -1,19 +0,0 @@
-import plugin from "./plugin.ts";
-
-export default [
-  {
-    files: ["files/*.js"],
-    plugins: {
-      "define-plugin-plugin": plugin,
-    },
-    rules: {
-      "define-plugin-plugin/create": "error",
-      "define-plugin-plugin/create-once": "error",
-      "define-plugin-plugin/create-once-before-false": "error",
-      "define-plugin-plugin/create-once-before-only": "error",
-      "define-plugin-plugin/create-once-after-only": "error",
-      "define-plugin-plugin/create-once-hooks-only": "error",
-      "define-plugin-plugin/create-once-no-hooks": "error",
-    },
-  },
-];
diff --git a/apps/oxlint/test/fixtures/definePlugin/eslint.snap.md b/apps/oxlint/test/fixtures/definePlugin/eslint.snap.md
deleted file mode 100644
index a26f214da5d71..0000000000000
--- a/apps/oxlint/test/fixtures/definePlugin/eslint.snap.md
+++ /dev/null
@@ -1,103 +0,0 @@
-# Exit code
-1
-
-# stdout
-```
-<fixture>/files/1.js
-  0:1  error  create body:
-this === rule: true                                         define-plugin-plugin/create
-  0:1  error  before hook:
-createOnce call count: 1
-this === rule: true
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-before-false
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-before-only
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-hooks-only
-  0:1  error  after hook:
-identNum: 2
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once
-  0:1  error  after hook:
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-after-only
-  0:1  error  after hook:
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-hooks-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create
-  1:5  error  ident visit fn "a":
-identNum: 1
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-before-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-after-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-no-hooks
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create
-  1:8  error  ident visit fn "b":
-identNum: 2
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-before-only
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-after-only
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-plugin/create-once-no-hooks
-
-<fixture>/files/2.js
-  0:1  error  create body:
-this === rule: true                                         define-plugin-plugin/create
-  0:1  error  before hook:
-createOnce call count: 1
-this === rule: true
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-before-false
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-before-only
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-hooks-only
-  0:1  error  after hook:
-identNum: 2
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-before-false
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-after-only
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-hooks-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create
-  1:5  error  ident visit fn "c":
-identNum: 1
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-before-false
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-before-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-after-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-no-hooks
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create
-  1:8  error  ident visit fn "d":
-identNum: 2
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-before-false
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-before-only
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-after-only
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-plugin/create-once-no-hooks
-
-✖ 39 problems (39 errors, 0 warnings)
-```
-
-# stderr
-```
-```
diff --git a/apps/oxlint/test/fixtures/definePlugin/output.snap.md b/apps/oxlint/test/fixtures/definePlugin/output.snap.md
index 5dedfdbe41ed3..2ffdca28a99c4 100644
--- a/apps/oxlint/test/fixtures/definePlugin/output.snap.md
+++ b/apps/oxlint/test/fixtures/definePlugin/output.snap.md
@@ -3,51 +3,6 @@
 
 # stdout
 ```
-  x define-plugin-plugin(create): create body:
-  | this === rule: true
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once): before hook:
-  | createOnce call count: 1
-  | this === rule: true
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once): after hook:
-  | identNum: 2
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once-after-only): after hook:
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once-before-false): before hook:
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once-before-only): before hook:
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
   x define-plugin-plugin(create): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
@@ -56,28 +11,6 @@
    `----
 
   x define-plugin-plugin(create-once): ident visit fn "a":
-  | identNum: 1
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:5]
- 1 | let a, b;
-   :     ^
-   `----
-
-  x define-plugin-plugin(create-once-after-only): ident visit fn "a":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:5]
- 1 | let a, b;
-   :     ^
-   `----
-
-  x define-plugin-plugin(create-once-before-only): ident visit fn "a":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:5]
- 1 | let a, b;
-   :     ^
-   `----
-
-  x define-plugin-plugin(create-once-no-hooks): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
  1 | let a, b;
@@ -92,86 +25,12 @@
    `----
 
   x define-plugin-plugin(create-once): ident visit fn "b":
-  | identNum: 2
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:8]
  1 | let a, b;
    :        ^
    `----
 
-  x define-plugin-plugin(create-once-after-only): ident visit fn "b":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:8]
- 1 | let a, b;
-   :        ^
-   `----
-
-  x define-plugin-plugin(create-once-before-only): ident visit fn "b":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:8]
- 1 | let a, b;
-   :        ^
-   `----
-
-  x define-plugin-plugin(create-once-no-hooks): ident visit fn "b":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:8]
- 1 | let a, b;
-   :        ^
-   `----
-
-  x define-plugin-plugin(create): create body:
-  | this === rule: true
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once): before hook:
-  | createOnce call count: 1
-  | this === rule: true
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once): after hook:
-  | identNum: 2
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once-after-only): after hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once-before-false): before hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once-before-false): after hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-plugin-plugin(create-once-before-only): before hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
   x define-plugin-plugin(create): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
@@ -180,35 +39,6 @@
    `----
 
   x define-plugin-plugin(create-once): ident visit fn "c":
-  | identNum: 1
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-plugin-plugin(create-once-after-only): ident visit fn "c":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-plugin-plugin(create-once-before-false): ident visit fn "c":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-plugin-plugin(create-once-before-only): ident visit fn "c":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-plugin-plugin(create-once-no-hooks): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
  1 | let c, d;
@@ -223,43 +53,14 @@
    `----
 
   x define-plugin-plugin(create-once): ident visit fn "d":
-  | identNum: 2
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-plugin-plugin(create-once-after-only): ident visit fn "d":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-plugin-plugin(create-once-before-false): ident visit fn "d":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-plugin-plugin(create-once-before-only): ident visit fn "d":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-plugin-plugin(create-once-no-hooks): ident visit fn "d":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
  1 | let c, d;
    :        ^
    `----
 
-Found 0 warnings and 35 errors.
-Finished in Xms on 2 files with 7 rules using X threads.
+Found 0 warnings and 8 errors.
+Finished in Xms on 2 files with 2 rules using X threads.
 ```
 
 # stderr
diff --git a/apps/oxlint/test/fixtures/definePlugin/plugin.ts b/apps/oxlint/test/fixtures/definePlugin/plugin.ts
index 115fb0baba32d..1c8621e005b7d 100644
--- a/apps/oxlint/test/fixtures/definePlugin/plugin.ts
+++ b/apps/oxlint/test/fixtures/definePlugin/plugin.ts
@@ -1,201 +1,21 @@
 import { definePlugin } from "#oxlint/plugin";
 
-import type { Node, Rule } from "#oxlint/plugin";
-
-const SPAN: Node = {
-  start: 0,
-  end: 0,
-  range: [0, 0],
-  loc: {
-    start: { line: 0, column: 0 },
-    end: { line: 0, column: 0 },
-  },
-};
+import type { Rule } from "#oxlint/plugin";
 
 const createRule: Rule = {
   create(context) {
-    context.report({ message: `create body:\nthis === rule: ${this === createRule}`, node: SPAN });
-
     return {
-      Identifier(node) {
-        context.report({
-          message: `ident visit fn "${node.name}":\nfilename: ${context.filename}`,
-          node,
-        });
-      },
-    };
-  },
-};
-
-// This aims to test that `createOnce` is called once only, and `before` hook is called once per file.
-// i.e. Oxlint calls `createOnce` directly, and not the `create` method that `defineRule` (via `definePlugin`)
-// adds to the rule.
-let createOnceCallCount = 0;
-
-const createOnceRule: Rule = {
-  createOnce(context) {
-    createOnceCallCount++;
-
-    // `fileNum` should be different for each file.
-    // `identNum` should start at 1 for each file.
-    let fileNum = 0,
-      identNum: number;
-    // Note: Files are processed in unpredictable order, so `files/1.js` may be `fileNum` 1 or 2.
-    // Therefore, collect all visits and check them in `after` hook of the 2nd file.
-    const visits: { fileNum: number; identNum: number }[] = [];
-
-    // `this` should be the rule object
-    // oxlint-disable-next-line typescript-eslint/no-this-alias
-    const topLevelThis = this;
-
-    return {
-      before() {
-        fileNum++;
-        identNum = 0;
-
-        context.report({
-          message:
-            "before hook:\n" +
-            `createOnce call count: ${createOnceCallCount}\n` +
-            `this === rule: ${topLevelThis === createOnceRule}\n` +
-            `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-      Identifier(node) {
-        identNum++;
-        visits.push({ fileNum, identNum });
-
-        context.report({
-          message:
-            `ident visit fn "${node.name}":\n` +
-            `identNum: ${identNum}\n` +
-            `filename: ${context.filename}`,
-          node,
-        });
-      },
-      after() {
-        context.report({
-          message: "after hook:\n" + `identNum: ${identNum}\n` + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-
-        if (fileNum === 2) {
-          visits.sort((v1, v2) => v1.fileNum - v2.fileNum);
-
-          const expectedVisits = [
-            { fileNum: 1, identNum: 1 },
-            { fileNum: 1, identNum: 2 },
-            { fileNum: 2, identNum: 1 },
-            { fileNum: 2, identNum: 2 },
-          ];
-
-          if (
-            visits.length !== expectedVisits.length ||
-            visits.some(
-              (v, i) =>
-                v.fileNum !== expectedVisits[i].fileNum ||
-                v.identNum !== expectedVisits[i].identNum,
-            )
-          ) {
-            context.report({ message: `Unexpected visits: ${JSON.stringify(visits)}`, node: SPAN });
-          }
-        }
-      },
-    };
-  },
-};
-
-// Tests that `before` hook returning `false` disables visiting AST for the file.
-const createOnceBeforeFalseRule: Rule = {
-  createOnce(context) {
-    return {
-      before() {
-        context.report({
-          message: "before hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-
-        // Only visit AST for `files/2.js`
-        return context.filename.endsWith("2.js");
-      },
       Identifier(node) {
         context.report({
           message: `ident visit fn "${node.name}":\n` + `filename: ${context.filename}`,
           node,
         });
       },
-      after() {
-        context.report({
-          message: "after hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-    };
-  },
-};
-
-// These 4 rules test that `createOnce` without `before` and `after` hooks works correctly.
-
-const createOnceBeforeOnlyRule: Rule = {
-  createOnce(context) {
-    return {
-      before() {
-        context.report({
-          message: "before hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-      Identifier(node) {
-        context.report({
-          message: `ident visit fn "${node.name}":\n` + `filename: ${context.filename}`,
-          node,
-        });
-      },
-    };
-  },
-};
-
-const createOnceAfterOnlyRule: Rule = {
-  createOnce(context) {
-    return {
-      Identifier(node) {
-        context.report({
-          message: `ident visit fn "${node.name}":\n` + `filename: ${context.filename}`,
-          node,
-        });
-      },
-      after() {
-        context.report({
-          message: "after hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
     };
   },
 };
 
-const createOnceHooksOnlyRule: Rule = {
-  createOnce(context) {
-    return {
-      // Neither hook should be called, because no AST node visitor functions
-      before() {
-        context.report({
-          message: "before hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-      after() {
-        context.report({
-          message: "after hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-    };
-  },
-};
-
-const createOnceNoHooksRule: Rule = {
+const createOnceRule: Rule = {
   createOnce(context) {
     return {
       Identifier(node) {
@@ -215,10 +35,5 @@ export default definePlugin({
   rules: {
     create: createRule,
     "create-once": createOnceRule,
-    "create-once-before-false": createOnceBeforeFalseRule,
-    "create-once-before-only": createOnceBeforeOnlyRule,
-    "create-once-after-only": createOnceAfterOnlyRule,
-    "create-once-hooks-only": createOnceHooksOnlyRule,
-    "create-once-no-hooks": createOnceNoHooksRule,
   },
 });
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/.oxlintrc.json b/apps/oxlint/test/fixtures/definePlugin_and_defineRule/.oxlintrc.json
deleted file mode 100644
index 1a0cebc110ea5..0000000000000
--- a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/.oxlintrc.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-  "jsPlugins": ["./plugin.ts"],
-  "categories": { "correctness": "off" },
-  "rules": {
-    "define-plugin-and-rule-plugin/create": "error",
-    "define-plugin-and-rule-plugin/create-once": "error",
-    "define-plugin-and-rule-plugin/create-once-before-false": "error",
-    "define-plugin-and-rule-plugin/create-once-before-only": "error",
-    "define-plugin-and-rule-plugin/create-once-after-only": "error",
-    "define-plugin-and-rule-plugin/create-once-hooks-only": "error",
-    "define-plugin-and-rule-plugin/create-once-no-hooks": "error"
-  }
-}
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/eslint.config.js b/apps/oxlint/test/fixtures/definePlugin_and_defineRule/eslint.config.js
deleted file mode 100644
index 315fef87cb166..0000000000000
--- a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/eslint.config.js
+++ /dev/null
@@ -1,19 +0,0 @@
-import plugin from "./plugin.ts";
-
-export default [
-  {
-    files: ["files/*.js"],
-    plugins: {
-      "define-plugin-and-rule-plugin": plugin,
-    },
-    rules: {
-      "define-plugin-and-rule-plugin/create": "error",
-      "define-plugin-and-rule-plugin/create-once": "error",
-      "define-plugin-and-rule-plugin/create-once-before-false": "error",
-      "define-plugin-and-rule-plugin/create-once-before-only": "error",
-      "define-plugin-and-rule-plugin/create-once-after-only": "error",
-      "define-plugin-and-rule-plugin/create-once-hooks-only": "error",
-      "define-plugin-and-rule-plugin/create-once-no-hooks": "error",
-    },
-  },
-];
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/eslint.snap.md b/apps/oxlint/test/fixtures/definePlugin_and_defineRule/eslint.snap.md
deleted file mode 100644
index 34fea45856490..0000000000000
--- a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/eslint.snap.md
+++ /dev/null
@@ -1,103 +0,0 @@
-# Exit code
-1
-
-# stdout
-```
-<fixture>/files/1.js
-  0:1  error  create body:
-this === rule: true                                         define-plugin-and-rule-plugin/create
-  0:1  error  before hook:
-createOnce call count: 1
-this === rule: true
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-before-false
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-before-only
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-hooks-only
-  0:1  error  after hook:
-identNum: 2
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once
-  0:1  error  after hook:
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-after-only
-  0:1  error  after hook:
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-hooks-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create
-  1:5  error  ident visit fn "a":
-identNum: 1
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-before-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-after-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-no-hooks
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create
-  1:8  error  ident visit fn "b":
-identNum: 2
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-before-only
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-after-only
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-plugin-and-rule-plugin/create-once-no-hooks
-
-<fixture>/files/2.js
-  0:1  error  create body:
-this === rule: true                                         define-plugin-and-rule-plugin/create
-  0:1  error  before hook:
-createOnce call count: 1
-this === rule: true
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-before-false
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-before-only
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-hooks-only
-  0:1  error  after hook:
-identNum: 2
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-before-false
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-after-only
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-hooks-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create
-  1:5  error  ident visit fn "c":
-identNum: 1
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-before-false
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-before-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-after-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-no-hooks
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create
-  1:8  error  ident visit fn "d":
-identNum: 2
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-before-false
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-before-only
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-after-only
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-plugin-and-rule-plugin/create-once-no-hooks
-
-✖ 39 problems (39 errors, 0 warnings)
-```
-
-# stderr
-```
-```
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/options.json b/apps/oxlint/test/fixtures/definePlugin_and_defineRule/options.json
deleted file mode 100644
index f380a596b9d7a..0000000000000
--- a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "eslint": true
-}
diff --git a/apps/oxlint/test/fixtures/defineRule/.oxlintrc.json b/apps/oxlint/test/fixtures/defineRule/.oxlintrc.json
index 9a2ce74204b05..d5a9663734b7d 100644
--- a/apps/oxlint/test/fixtures/defineRule/.oxlintrc.json
+++ b/apps/oxlint/test/fixtures/defineRule/.oxlintrc.json
@@ -3,11 +3,6 @@
   "categories": { "correctness": "off" },
   "rules": {
     "define-rule-plugin/create": "error",
-    "define-rule-plugin/create-once": "error",
-    "define-rule-plugin/create-once-before-false": "error",
-    "define-rule-plugin/create-once-before-only": "error",
-    "define-rule-plugin/create-once-after-only": "error",
-    "define-rule-plugin/create-once-hooks-only": "error",
-    "define-rule-plugin/create-once-no-hooks": "error"
+    "define-rule-plugin/create-once": "error"
   }
 }
diff --git a/apps/oxlint/test/fixtures/defineRule/eslint.config.js b/apps/oxlint/test/fixtures/defineRule/eslint.config.js
deleted file mode 100644
index a17f865b95c38..0000000000000
--- a/apps/oxlint/test/fixtures/defineRule/eslint.config.js
+++ /dev/null
@@ -1,19 +0,0 @@
-import plugin from "./plugin.ts";
-
-export default [
-  {
-    files: ["files/*.js"],
-    plugins: {
-      "define-rule-plugin": plugin,
-    },
-    rules: {
-      "define-rule-plugin/create": "error",
-      "define-rule-plugin/create-once": "error",
-      "define-rule-plugin/create-once-before-false": "error",
-      "define-rule-plugin/create-once-before-only": "error",
-      "define-rule-plugin/create-once-after-only": "error",
-      "define-rule-plugin/create-once-hooks-only": "error",
-      "define-rule-plugin/create-once-no-hooks": "error",
-    },
-  },
-];
diff --git a/apps/oxlint/test/fixtures/defineRule/eslint.snap.md b/apps/oxlint/test/fixtures/defineRule/eslint.snap.md
deleted file mode 100644
index 0908bd2eb2082..0000000000000
--- a/apps/oxlint/test/fixtures/defineRule/eslint.snap.md
+++ /dev/null
@@ -1,103 +0,0 @@
-# Exit code
-1
-
-# stdout
-```
-<fixture>/files/1.js
-  0:1  error  create body:
-this === rule: true                                         define-rule-plugin/create
-  0:1  error  before hook:
-createOnce call count: 1
-this === rule: true
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-before-false
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-before-only
-  0:1  error  before hook:
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-hooks-only
-  0:1  error  after hook:
-identNum: 2
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once
-  0:1  error  after hook:
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-after-only
-  0:1  error  after hook:
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-hooks-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-rule-plugin/create
-  1:5  error  ident visit fn "a":
-identNum: 1
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-before-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-after-only
-  1:5  error  ident visit fn "a":
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-no-hooks
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-rule-plugin/create
-  1:8  error  ident visit fn "b":
-identNum: 2
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-before-only
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-after-only
-  1:8  error  ident visit fn "b":
-filename: <fixture>/files/1.js                              define-rule-plugin/create-once-no-hooks
-
-<fixture>/files/2.js
-  0:1  error  create body:
-this === rule: true                                         define-rule-plugin/create
-  0:1  error  before hook:
-createOnce call count: 1
-this === rule: true
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-before-false
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-before-only
-  0:1  error  before hook:
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-hooks-only
-  0:1  error  after hook:
-identNum: 2
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-before-false
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-after-only
-  0:1  error  after hook:
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-hooks-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-rule-plugin/create
-  1:5  error  ident visit fn "c":
-identNum: 1
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-before-false
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-before-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-after-only
-  1:5  error  ident visit fn "c":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-no-hooks
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-rule-plugin/create
-  1:8  error  ident visit fn "d":
-identNum: 2
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-before-false
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-before-only
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-after-only
-  1:8  error  ident visit fn "d":
-filename: <fixture>/files/2.js                              define-rule-plugin/create-once-no-hooks
-
-✖ 39 problems (39 errors, 0 warnings)
-```
-
-# stderr
-```
-```
diff --git a/apps/oxlint/test/fixtures/defineRule/options.json b/apps/oxlint/test/fixtures/defineRule/options.json
deleted file mode 100644
index f380a596b9d7a..0000000000000
--- a/apps/oxlint/test/fixtures/defineRule/options.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "eslint": true
-}
diff --git a/apps/oxlint/test/fixtures/defineRule/output.snap.md b/apps/oxlint/test/fixtures/defineRule/output.snap.md
index 4dfc433722a42..b331fd1ac3110 100644
--- a/apps/oxlint/test/fixtures/defineRule/output.snap.md
+++ b/apps/oxlint/test/fixtures/defineRule/output.snap.md
@@ -3,51 +3,6 @@
 
 # stdout
 ```
-  x define-rule-plugin(create): create body:
-  | this === rule: true
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once): before hook:
-  | createOnce call count: 1
-  | this === rule: true
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once): after hook:
-  | identNum: 2
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once-after-only): after hook:
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once-before-false): before hook:
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once-before-only): before hook:
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:1]
- 1 | let a, b;
-   : ^
-   `----
-
   x define-rule-plugin(create): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
@@ -56,28 +11,6 @@
    `----
 
   x define-rule-plugin(create-once): ident visit fn "a":
-  | identNum: 1
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:5]
- 1 | let a, b;
-   :     ^
-   `----
-
-  x define-rule-plugin(create-once-after-only): ident visit fn "a":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:5]
- 1 | let a, b;
-   :     ^
-   `----
-
-  x define-rule-plugin(create-once-before-only): ident visit fn "a":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:5]
- 1 | let a, b;
-   :     ^
-   `----
-
-  x define-rule-plugin(create-once-no-hooks): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
  1 | let a, b;
@@ -92,86 +25,12 @@
    `----
 
   x define-rule-plugin(create-once): ident visit fn "b":
-  | identNum: 2
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:8]
  1 | let a, b;
    :        ^
    `----
 
-  x define-rule-plugin(create-once-after-only): ident visit fn "b":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:8]
- 1 | let a, b;
-   :        ^
-   `----
-
-  x define-rule-plugin(create-once-before-only): ident visit fn "b":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:8]
- 1 | let a, b;
-   :        ^
-   `----
-
-  x define-rule-plugin(create-once-no-hooks): ident visit fn "b":
-  | filename: <fixture>/files/1.js
-   ,-[files/1.js:1:8]
- 1 | let a, b;
-   :        ^
-   `----
-
-  x define-rule-plugin(create): create body:
-  | this === rule: true
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once): before hook:
-  | createOnce call count: 1
-  | this === rule: true
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once): after hook:
-  | identNum: 2
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once-after-only): after hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once-before-false): before hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once-before-false): after hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
-  x define-rule-plugin(create-once-before-only): before hook:
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:1]
- 1 | let c, d;
-   : ^
-   `----
-
   x define-rule-plugin(create): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
@@ -180,35 +39,6 @@
    `----
 
   x define-rule-plugin(create-once): ident visit fn "c":
-  | identNum: 1
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-rule-plugin(create-once-after-only): ident visit fn "c":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-rule-plugin(create-once-before-false): ident visit fn "c":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-rule-plugin(create-once-before-only): ident visit fn "c":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:5]
- 1 | let c, d;
-   :     ^
-   `----
-
-  x define-rule-plugin(create-once-no-hooks): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
  1 | let c, d;
@@ -223,43 +53,14 @@
    `----
 
   x define-rule-plugin(create-once): ident visit fn "d":
-  | identNum: 2
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-rule-plugin(create-once-after-only): ident visit fn "d":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-rule-plugin(create-once-before-false): ident visit fn "d":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-rule-plugin(create-once-before-only): ident visit fn "d":
-  | filename: <fixture>/files/2.js
-   ,-[files/2.js:1:8]
- 1 | let c, d;
-   :        ^
-   `----
-
-  x define-rule-plugin(create-once-no-hooks): ident visit fn "d":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
  1 | let c, d;
    :        ^
    `----
 
-Found 0 warnings and 35 errors.
-Finished in Xms on 2 files with 7 rules using X threads.
+Found 0 warnings and 8 errors.
+Finished in Xms on 2 files with 2 rules using X threads.
 ```
 
 # stderr
diff --git a/apps/oxlint/test/fixtures/defineRule/plugin.ts b/apps/oxlint/test/fixtures/defineRule/plugin.ts
index 0027e6f21ce13..d1f6652c71df3 100644
--- a/apps/oxlint/test/fixtures/defineRule/plugin.ts
+++ b/apps/oxlint/test/fixtures/defineRule/plugin.ts
@@ -1,150 +1,8 @@
 import { defineRule } from "#oxlint/plugin";
 
-import type { Node } from "#oxlint/plugin";
-
-const SPAN: Node = {
-  start: 0,
-  end: 0,
-  range: [0, 0],
-  loc: {
-    start: { line: 0, column: 0 },
-    end: { line: 0, column: 0 },
-  },
-};
-
 const createRule = defineRule({
   create(context) {
-    context.report({ message: `create body:\nthis === rule: ${this === createRule}`, node: SPAN });
-
-    return {
-      Identifier(node) {
-        context.report({
-          message: `ident visit fn "${node.name}":\nfilename: ${context.filename}`,
-          node,
-        });
-      },
-    };
-  },
-});
-
-// This aims to test that `createOnce` is called once only, and `before` hook is called once per file.
-// i.e. Oxlint calls `createOnce` directly, and not the `create` method that `defineRule` adds to the rule.
-let createOnceCallCount = 0;
-
-const createOnceRule = defineRule({
-  createOnce(context) {
-    createOnceCallCount++;
-
-    // `fileNum` should be different for each file.
-    // `identNum` should start at 1 for each file.
-    let fileNum = 0,
-      identNum: number;
-    // Note: Files are processed in unpredictable order, so `files/1.js` may be `fileNum` 1 or 2.
-    // Therefore, collect all visits and check them in `after` hook of the 2nd file.
-    const visits: { fileNum: number; identNum: number }[] = [];
-
-    // `this` should be the rule object returned by `defineRule`
-    // oxlint-disable-next-line typescript-eslint/no-this-alias
-    const topLevelThis = this;
-
-    return {
-      before() {
-        fileNum++;
-        identNum = 0;
-
-        context.report({
-          message:
-            "before hook:\n" +
-            `createOnce call count: ${createOnceCallCount}\n` +
-            `this === rule: ${topLevelThis === createOnceRule}\n` +
-            `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-      Identifier(node) {
-        identNum++;
-        visits.push({ fileNum, identNum });
-
-        context.report({
-          message:
-            `ident visit fn "${node.name}":\n` +
-            `identNum: ${identNum}\n` +
-            `filename: ${context.filename}`,
-          node,
-        });
-      },
-      after() {
-        context.report({
-          message: "after hook:\n" + `identNum: ${identNum}\n` + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-
-        if (fileNum === 2) {
-          visits.sort((v1, v2) => v1.fileNum - v2.fileNum);
-
-          const expectedVisits = [
-            { fileNum: 1, identNum: 1 },
-            { fileNum: 1, identNum: 2 },
-            { fileNum: 2, identNum: 1 },
-            { fileNum: 2, identNum: 2 },
-          ];
-
-          if (
-            visits.length !== expectedVisits.length ||
-            visits.some(
-              (v, i) =>
-                v.fileNum !== expectedVisits[i].fileNum ||
-                v.identNum !== expectedVisits[i].identNum,
-            )
-          ) {
-            context.report({ message: `Unexpected visits: ${JSON.stringify(visits)}`, node: SPAN });
-          }
-        }
-      },
-    };
-  },
-});
-
-// Tests that `before` hook returning `false` disables visiting AST for the file.
-const createOnceBeforeFalseRule = defineRule({
-  createOnce(context) {
-    return {
-      before() {
-        context.report({
-          message: "before hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-
-        // Only visit AST for `files/2.js`
-        return context.filename.endsWith("2.js");
-      },
-      Identifier(node) {
-        context.report({
-          message: `ident visit fn "${node.name}":\n` + `filename: ${context.filename}`,
-          node,
-        });
-      },
-      after() {
-        context.report({
-          message: "after hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-    };
-  },
-});
-
-// These 4 rules test that `createOnce` without `before` and `after` hooks works correctly.
-
-const createOnceBeforeOnlyRule = defineRule({
-  createOnce(context) {
     return {
-      before() {
-        context.report({
-          message: "before hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
       Identifier(node) {
         context.report({
           message: `ident visit fn "${node.name}":\n` + `filename: ${context.filename}`,
@@ -155,46 +13,7 @@ const createOnceBeforeOnlyRule = defineRule({
   },
 });
 
-const createOnceAfterOnlyRule = defineRule({
-  createOnce(context) {
-    return {
-      Identifier(node) {
-        context.report({
-          message: `ident visit fn "${node.name}":\n` + `filename: ${context.filename}`,
-          node,
-        });
-      },
-      after() {
-        context.report({
-          message: "after hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-    };
-  },
-});
-
-const createOnceHooksOnlyRule = defineRule({
-  createOnce(context) {
-    return {
-      // Neither hook should be called, because no AST node visitor functions
-      before() {
-        context.report({
-          message: "before hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-      after() {
-        context.report({
-          message: "after hook:\n" + `filename: ${context.filename}`,
-          node: SPAN,
-        });
-      },
-    };
-  },
-});
-
-const createOnceNoHooksRule = defineRule({
+const createOnceRule = defineRule({
   createOnce(context) {
     return {
       Identifier(node) {
@@ -214,10 +33,5 @@ export default {
   rules: {
     create: createRule,
     "create-once": createOnceRule,
-    "create-once-before-false": createOnceBeforeFalseRule,
-    "create-once-before-only": createOnceBeforeOnlyRule,
-    "create-once-after-only": createOnceAfterOnlyRule,
-    "create-once-hooks-only": createOnceHooksOnlyRule,
-    "create-once-no-hooks": createOnceNoHooksRule,
   },
 };
diff --git a/apps/oxlint/test/fixtures/eslintCompat/.oxlintrc.json b/apps/oxlint/test/fixtures/eslintCompat/.oxlintrc.json
new file mode 100644
index 0000000000000..71f69bdb13a72
--- /dev/null
+++ b/apps/oxlint/test/fixtures/eslintCompat/.oxlintrc.json
@@ -0,0 +1,13 @@
+{
+  "jsPlugins": ["./plugin.ts"],
+  "categories": { "correctness": "off" },
+  "rules": {
+    "eslint-compat-plugin/create": "error",
+    "eslint-compat-plugin/create-once": "error",
+    "eslint-compat-plugin/create-once-before-false": "error",
+    "eslint-compat-plugin/create-once-before-only": "error",
+    "eslint-compat-plugin/create-once-after-only": "error",
+    "eslint-compat-plugin/create-once-hooks-only": "error",
+    "eslint-compat-plugin/create-once-no-hooks": "error"
+  }
+}
diff --git a/apps/oxlint/test/fixtures/eslintCompat/eslint.config.js b/apps/oxlint/test/fixtures/eslintCompat/eslint.config.js
new file mode 100644
index 0000000000000..1c2edc11d1a8c
--- /dev/null
+++ b/apps/oxlint/test/fixtures/eslintCompat/eslint.config.js
@@ -0,0 +1,19 @@
+import plugin from "./plugin.ts";
+
+export default [
+  {
+    files: ["files/*.js"],
+    plugins: {
+      "eslint-compat-plugin": plugin,
+    },
+    rules: {
+      "eslint-compat-plugin/create": "error",
+      "eslint-compat-plugin/create-once": "error",
+      "eslint-compat-plugin/create-once-before-false": "error",
+      "eslint-compat-plugin/create-once-before-only": "error",
+      "eslint-compat-plugin/create-once-after-only": "error",
+      "eslint-compat-plugin/create-once-hooks-only": "error",
+      "eslint-compat-plugin/create-once-no-hooks": "error",
+    },
+  },
+];
diff --git a/apps/oxlint/test/fixtures/eslintCompat/eslint.snap.md b/apps/oxlint/test/fixtures/eslintCompat/eslint.snap.md
new file mode 100644
index 0000000000000..d74c9e727e942
--- /dev/null
+++ b/apps/oxlint/test/fixtures/eslintCompat/eslint.snap.md
@@ -0,0 +1,103 @@
+# Exit code
+1
+
+# stdout
+```
+<fixture>/files/1.js
+  0:1  error  create body:
+this === rule: true                                         eslint-compat-plugin/create
+  0:1  error  before hook:
+createOnce call count: 1
+this === rule: true
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once
+  0:1  error  before hook:
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-before-false
+  0:1  error  before hook:
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-before-only
+  0:1  error  before hook:
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-hooks-only
+  0:1  error  after hook:
+identNum: 2
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once
+  0:1  error  after hook:
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-after-only
+  0:1  error  after hook:
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-hooks-only
+  1:5  error  ident visit fn "a":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create
+  1:5  error  ident visit fn "a":
+identNum: 1
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once
+  1:5  error  ident visit fn "a":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-before-only
+  1:5  error  ident visit fn "a":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-after-only
+  1:5  error  ident visit fn "a":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-no-hooks
+  1:8  error  ident visit fn "b":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create
+  1:8  error  ident visit fn "b":
+identNum: 2
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once
+  1:8  error  ident visit fn "b":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-before-only
+  1:8  error  ident visit fn "b":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-after-only
+  1:8  error  ident visit fn "b":
+filename: <fixture>/files/1.js                              eslint-compat-plugin/create-once-no-hooks
+
+<fixture>/files/2.js
+  0:1  error  create body:
+this === rule: true                                         eslint-compat-plugin/create
+  0:1  error  before hook:
+createOnce call count: 1
+this === rule: true
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once
+  0:1  error  before hook:
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-before-false
+  0:1  error  before hook:
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-before-only
+  0:1  error  before hook:
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-hooks-only
+  0:1  error  after hook:
+identNum: 2
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once
+  0:1  error  after hook:
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-before-false
+  0:1  error  after hook:
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-after-only
+  0:1  error  after hook:
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-hooks-only
+  1:5  error  ident visit fn "c":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create
+  1:5  error  ident visit fn "c":
+identNum: 1
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once
+  1:5  error  ident visit fn "c":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-before-false
+  1:5  error  ident visit fn "c":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-before-only
+  1:5  error  ident visit fn "c":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-after-only
+  1:5  error  ident visit fn "c":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-no-hooks
+  1:8  error  ident visit fn "d":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create
+  1:8  error  ident visit fn "d":
+identNum: 2
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once
+  1:8  error  ident visit fn "d":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-before-false
+  1:8  error  ident visit fn "d":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-before-only
+  1:8  error  ident visit fn "d":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-after-only
+  1:8  error  ident visit fn "d":
+filename: <fixture>/files/2.js                              eslint-compat-plugin/create-once-no-hooks
+
+✖ 39 problems (39 errors, 0 warnings)
+```
+
+# stderr
+```
+```
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/files/1.js b/apps/oxlint/test/fixtures/eslintCompat/files/1.js
similarity index 100%
rename from apps/oxlint/test/fixtures/definePlugin_and_defineRule/files/1.js
rename to apps/oxlint/test/fixtures/eslintCompat/files/1.js
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/files/2.js b/apps/oxlint/test/fixtures/eslintCompat/files/2.js
similarity index 100%
rename from apps/oxlint/test/fixtures/definePlugin_and_defineRule/files/2.js
rename to apps/oxlint/test/fixtures/eslintCompat/files/2.js
diff --git a/apps/oxlint/test/fixtures/definePlugin/options.json b/apps/oxlint/test/fixtures/eslintCompat/options.json
similarity index 100%
rename from apps/oxlint/test/fixtures/definePlugin/options.json
rename to apps/oxlint/test/fixtures/eslintCompat/options.json
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/output.snap.md b/apps/oxlint/test/fixtures/eslintCompat/output.snap.md
similarity index 59%
rename from apps/oxlint/test/fixtures/definePlugin_and_defineRule/output.snap.md
rename to apps/oxlint/test/fixtures/eslintCompat/output.snap.md
index b2bd81109fd52..b38ef26091092 100644
--- a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/output.snap.md
+++ b/apps/oxlint/test/fixtures/eslintCompat/output.snap.md
@@ -3,14 +3,14 @@
 
 # stdout
 ```
-  x define-plugin-and-rule-plugin(create): create body:
+  x eslint-compat-plugin(create): create body:
   | this === rule: true
    ,-[files/1.js:1:1]
  1 | let a, b;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): before hook:
+  x eslint-compat-plugin(create-once): before hook:
   | createOnce call count: 1
   | this === rule: true
   | filename: <fixture>/files/1.js
@@ -19,7 +19,7 @@
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): after hook:
+  x eslint-compat-plugin(create-once): after hook:
   | identNum: 2
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:1]
@@ -27,35 +27,35 @@
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-after-only): after hook:
+  x eslint-compat-plugin(create-once-after-only): after hook:
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:1]
  1 | let a, b;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-false): before hook:
+  x eslint-compat-plugin(create-once-before-false): before hook:
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:1]
  1 | let a, b;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-only): before hook:
+  x eslint-compat-plugin(create-once-before-only): before hook:
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:1]
  1 | let a, b;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create): ident visit fn "a":
+  x eslint-compat-plugin(create): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
  1 | let a, b;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): ident visit fn "a":
+  x eslint-compat-plugin(create-once): ident visit fn "a":
   | identNum: 1
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
@@ -63,35 +63,35 @@
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-after-only): ident visit fn "a":
+  x eslint-compat-plugin(create-once-after-only): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
  1 | let a, b;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-only): ident visit fn "a":
+  x eslint-compat-plugin(create-once-before-only): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
  1 | let a, b;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-no-hooks): ident visit fn "a":
+  x eslint-compat-plugin(create-once-no-hooks): ident visit fn "a":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:5]
  1 | let a, b;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create): ident visit fn "b":
+  x eslint-compat-plugin(create): ident visit fn "b":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:8]
  1 | let a, b;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): ident visit fn "b":
+  x eslint-compat-plugin(create-once): ident visit fn "b":
   | identNum: 2
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:8]
@@ -99,35 +99,35 @@
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-after-only): ident visit fn "b":
+  x eslint-compat-plugin(create-once-after-only): ident visit fn "b":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:8]
  1 | let a, b;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-only): ident visit fn "b":
+  x eslint-compat-plugin(create-once-before-only): ident visit fn "b":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:8]
  1 | let a, b;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-no-hooks): ident visit fn "b":
+  x eslint-compat-plugin(create-once-no-hooks): ident visit fn "b":
   | filename: <fixture>/files/1.js
    ,-[files/1.js:1:8]
  1 | let a, b;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create): create body:
+  x eslint-compat-plugin(create): create body:
   | this === rule: true
    ,-[files/2.js:1:1]
  1 | let c, d;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): before hook:
+  x eslint-compat-plugin(create-once): before hook:
   | createOnce call count: 1
   | this === rule: true
   | filename: <fixture>/files/2.js
@@ -136,7 +136,7 @@
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): after hook:
+  x eslint-compat-plugin(create-once): after hook:
   | identNum: 2
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:1]
@@ -144,42 +144,42 @@
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-after-only): after hook:
+  x eslint-compat-plugin(create-once-after-only): after hook:
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:1]
  1 | let c, d;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-false): before hook:
+  x eslint-compat-plugin(create-once-before-false): before hook:
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:1]
  1 | let c, d;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-false): after hook:
+  x eslint-compat-plugin(create-once-before-false): after hook:
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:1]
  1 | let c, d;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-only): before hook:
+  x eslint-compat-plugin(create-once-before-only): before hook:
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:1]
  1 | let c, d;
    : ^
    `----
 
-  x define-plugin-and-rule-plugin(create): ident visit fn "c":
+  x eslint-compat-plugin(create): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
  1 | let c, d;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): ident visit fn "c":
+  x eslint-compat-plugin(create-once): ident visit fn "c":
   | identNum: 1
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
@@ -187,42 +187,42 @@
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-after-only): ident visit fn "c":
+  x eslint-compat-plugin(create-once-after-only): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
  1 | let c, d;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-false): ident visit fn "c":
+  x eslint-compat-plugin(create-once-before-false): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
  1 | let c, d;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-only): ident visit fn "c":
+  x eslint-compat-plugin(create-once-before-only): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
  1 | let c, d;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-no-hooks): ident visit fn "c":
+  x eslint-compat-plugin(create-once-no-hooks): ident visit fn "c":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:5]
  1 | let c, d;
    :     ^
    `----
 
-  x define-plugin-and-rule-plugin(create): ident visit fn "d":
+  x eslint-compat-plugin(create): ident visit fn "d":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
  1 | let c, d;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once): ident visit fn "d":
+  x eslint-compat-plugin(create-once): ident visit fn "d":
   | identNum: 2
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
@@ -230,28 +230,28 @@
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-after-only): ident visit fn "d":
+  x eslint-compat-plugin(create-once-after-only): ident visit fn "d":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
  1 | let c, d;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-false): ident visit fn "d":
+  x eslint-compat-plugin(create-once-before-false): ident visit fn "d":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
  1 | let c, d;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-before-only): ident visit fn "d":
+  x eslint-compat-plugin(create-once-before-only): ident visit fn "d":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
  1 | let c, d;
    :        ^
    `----
 
-  x define-plugin-and-rule-plugin(create-once-no-hooks): ident visit fn "d":
+  x eslint-compat-plugin(create-once-no-hooks): ident visit fn "d":
   | filename: <fixture>/files/2.js
    ,-[files/2.js:1:8]
  1 | let c, d;
diff --git a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/plugin.ts b/apps/oxlint/test/fixtures/eslintCompat/plugin.ts
similarity index 86%
rename from apps/oxlint/test/fixtures/definePlugin_and_defineRule/plugin.ts
rename to apps/oxlint/test/fixtures/eslintCompat/plugin.ts
index f19290d9aef77..c6324395e94df 100644
--- a/apps/oxlint/test/fixtures/definePlugin_and_defineRule/plugin.ts
+++ b/apps/oxlint/test/fixtures/eslintCompat/plugin.ts
@@ -1,6 +1,6 @@
-import { definePlugin, defineRule } from "#oxlint/plugin";
+import { eslintCompatPlugin } from "#oxlint/plugin";
 
-import type { Node } from "#oxlint/plugin";
+import type { Node, Rule } from "#oxlint/plugin";
 
 const SPAN: Node = {
   start: 0,
@@ -12,26 +12,29 @@ const SPAN: Node = {
   },
 };
 
-const createRule = defineRule({
+const createRule: Rule = {
   create(context) {
-    context.report({ message: `create body:\nthis === rule: ${this === createRule}`, node: SPAN });
+    context.report({
+      message: `create body:\n` + `this === rule: ${this === createRule}`,
+      node: SPAN,
+    });
 
     return {
       Identifier(node) {
         context.report({
-          message: `ident visit fn "${node.name}":\nfilename: ${context.filename}`,
+          message: `ident visit fn "${node.name}":\n` + `filename: ${context.filename}`,
           node,
         });
       },
     };
   },
-});
+};
 
 // This aims to test that `createOnce` is called once only, and `before` hook is called once per file.
-// i.e. Oxlint calls `createOnce` directly, and not the `create` method that `defineRule` adds to the rule.
+// i.e. Oxlint calls `createOnce` directly, and not the `create` method that `eslintCompatPlugin` adds to the rule.
 let createOnceCallCount = 0;
 
-const createOnceRule = defineRule({
+const createOnceRule: Rule = {
   createOnce(context) {
     createOnceCallCount++;
 
@@ -43,7 +46,7 @@ const createOnceRule = defineRule({
     // Therefore, collect all visits and check them in `after` hook of the 2nd file.
     const visits: { fileNum: number; identNum: number }[] = [];
 
-    // `this` should be the rule object returned by `defineRule`
+    // `this` should be the rule object
     // oxlint-disable-next-line typescript-eslint/no-this-alias
     const topLevelThis = this;
 
@@ -103,10 +106,10 @@ const createOnceRule = defineRule({
       },
     };
   },
-});
+};
 
 // Tests that `before` hook returning `false` disables visiting AST for the file.
-const createOnceBeforeFalseRule = defineRule({
+const createOnceBeforeFalseRule: Rule = {
   createOnce(context) {
     return {
       before() {
@@ -132,11 +135,11 @@ const createOnceBeforeFalseRule = defineRule({
       },
     };
   },
-});
+};
 
 // These 4 rules test that `createOnce` without `before` and `after` hooks works correctly.
 
-const createOnceBeforeOnlyRule = defineRule({
+const createOnceBeforeOnlyRule: Rule = {
   createOnce(context) {
     return {
       before() {
@@ -153,9 +156,9 @@ const createOnceBeforeOnlyRule = defineRule({
       },
     };
   },
-});
+};
 
-const createOnceAfterOnlyRule = defineRule({
+const createOnceAfterOnlyRule: Rule = {
   createOnce(context) {
     return {
       Identifier(node) {
@@ -172,9 +175,9 @@ const createOnceAfterOnlyRule = defineRule({
       },
     };
   },
-});
+};
 
-const createOnceHooksOnlyRule = defineRule({
+const createOnceHooksOnlyRule: Rule = {
   createOnce(context) {
     return {
       // Neither hook should be called, because no AST node visitor functions
@@ -192,9 +195,9 @@ const createOnceHooksOnlyRule = defineRule({
       },
     };
   },
-});
+};
 
-const createOnceNoHooksRule = defineRule({
+const createOnceNoHooksRule: Rule = {
   createOnce(context) {
     return {
       Identifier(node) {
@@ -205,11 +208,11 @@ const createOnceNoHooksRule = defineRule({
       },
     };
   },
-});
+};
 
-export default definePlugin({
+export default eslintCompatPlugin({
   meta: {
-    name: "define-plugin-and-rule-plugin",
+    name: "eslint-compat-plugin",
   },
   rules: {
     create: createRule,