diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2e7048..9b8be89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,25 @@
 
 ## [Unreleased]
 
+## [2.2.4](https://github.com/lint-md/cli/compare/v2.2.3...v2.2.4) (2026-07-30)
+
+### Dependencies
+
+- upgrade `@lint-md/core` from `^2.2.1` to `^2.3.0`
+
+### Documentation
+
+- document Core 2.3 opt-in rules in both README files
+
+### Tests
+
+- add a CLI regression test for the Core 2.3 opt-in rules
+
+### Refactoring
+
+- use `fixMarkdown()` for CLI fix paths
+- require an explicit fix mode for lint workers
+
 ## [2.2.3](https://github.com/lint-md/cli/compare/v2.2.2...v2.2.3) (2026-07-29)
 
 ### Tests
diff --git a/README.en-US.md b/README.en-US.md
index e41a66e..1ff5c11 100644
--- a/README.en-US.md
+++ b/README.en-US.md
@@ -103,6 +103,59 @@ The image runs as a non-root user by default. If the mounted directory has stric
 | `extensions`   | `string[]` | `[".md", ".markdown", ".mdx"]`         | File extensions to lint                                               |
 | `rules`        | `object`   | `{}`                                   | Rule configuration. See the `@lint-md/core` documentation for details |
 
+### Core 2.3 Rules
+
+The following rules are disabled by default.
+Enable them in `./.lintmdrc` at the project root.
+
+```json
+{
+  "rules": {
+    "require-trailing-spaces": 2,
+    "space-around-link": 2,
+    "no-multiple-blank-lines": 2
+  }
+}
+```
+
+The CLI reads `./.lintmdrc` by default.
+Use `lint-md --config <file-path>` to select another file.
+
+For direct Core API use, configure rules in `fixMarkdown()`.
+
+```ts
+import { fixMarkdown, RULE_SEVERITY } from "@lint-md/core";
+
+const markdown = "First line\nSecond line";
+const result = fixMarkdown(markdown, {
+  rules: {
+    "require-trailing-spaces": RULE_SEVERITY.ERROR,
+    "space-around-link": RULE_SEVERITY.ERROR,
+    "no-multiple-blank-lines": RULE_SEVERITY.ERROR,
+  },
+});
+
+console.log(result.fixedResult.result);
+```
+
+`RULE_SEVERITY.ERROR` equals rule level `2`.
+`fixMarkdown()` always applies fixes.
+Use `lintMarkdown(markdown, rules, false)` for lint-only checks.
+
+`space-around-link` handles normal, automatic, and reference links.
+It does not handle standalone images.
+Full-width punctuation needs no added spaces.
+Other Unicode punctuation needs no added spaces.
+Existing whitespace needs no added spaces.
+Block boundaries need no added spaces.
+Adjacent links receive only one space.
+
+`no-multiple-blank-lines` reduces consecutive blank lines to one blank line.
+It removes blank lines at the document start.
+It keeps one final newline at the document end.
+Lines that contain only spaces or tabs are blank lines.
+Content inside code blocks remains unchanged.
+
 ## Exit Codes
 
 - `0`: no errors were found, or only warnings were found while `--suppress-warnings` is enabled
diff --git a/README.md b/README.md
index 29cdcb2..9198d8a 100644
--- a/README.md
+++ b/README.md
@@ -103,6 +103,55 @@ docker run --rm \
 | `extensions`   | `string[]` | `[".md", ".markdown", ".mdx"]`         | 要 lint 的文件扩展名                |
 | `rules`        | `object`   | `{}`                                   | 规则配置，详见 `@lint-md/core` 文档 |
 
+### Core 2.3 新规则
+
+以下规则默认关闭。请在项目根目录的 `./.lintmdrc` 中启用它们。
+
+```json
+{
+  "rules": {
+    "require-trailing-spaces": 2,
+    "space-around-link": 2,
+    "no-multiple-blank-lines": 2
+  }
+}
+```
+
+CLI 默认读取 `./.lintmdrc`。
+也可以使用 `lint-md --config <文件路径>` 指定配置文件。
+
+直接使用 Core API 时，请在 `fixMarkdown()` 的 `rules` 中配置规则。
+
+```ts
+import { fixMarkdown, RULE_SEVERITY } from "@lint-md/core";
+
+const markdown = "第一行\n第二行";
+const result = fixMarkdown(markdown, {
+  rules: {
+    "require-trailing-spaces": RULE_SEVERITY.ERROR,
+    "space-around-link": RULE_SEVERITY.ERROR,
+    "no-multiple-blank-lines": RULE_SEVERITY.ERROR,
+  },
+});
+
+console.log(result.fixedResult.result);
+```
+
+`RULE_SEVERITY.ERROR` 等同于规则级别 `2`。
+`fixMarkdown()` 始终执行自动修复。
+只检查时，请使用 `lintMarkdown(markdown, rules, false)`。
+
+`space-around-link` 处理普通链接、自动链接和引用链接。
+它不处理独立图片。
+全角标点、其他 Unicode 标点、已有空白和块边界不需要空格。
+连续链接之间只添加一个空格。
+
+`no-multiple-blank-lines` 将连续空白行修复为一个空白行。
+它删除文档开头的空白行。
+它保留文档末尾的一个换行。
+空格和 Tab 组成的行也算空白行。
+代码块内部内容不受影响。
+
 ## 退出码约定
 
 - `0`：无错误（或仅 warning 且启用了 `--suppress-warnings`）
diff --git a/__tests__/core-2-3-cli.spec.ts b/__tests__/core-2-3-cli.spec.ts
new file mode 100644
index 0000000..68fd097
--- /dev/null
+++ b/__tests__/core-2-3-cli.spec.ts
@@ -0,0 +1,48 @@
+import { execFileSync } from "child_process";
+import { mkdtempSync, rmSync, writeFileSync } from "fs";
+import { tmpdir } from "os";
+import * as path from "path";
+
+const TSX = path.resolve(__dirname, "../node_modules/tsx/dist/cli.mjs");
+const CLI = path.resolve(__dirname, "../src/lint-md.ts");
+
+describe("core 2.3 rules", () => {
+  let tmpDir: string;
+  let configPath: string;
+
+  beforeEach(() => {
+    tmpDir = mkdtempSync(path.join(tmpdir(), "lint-md-core-2-3-"));
+    configPath = path.join(tmpDir, ".lintmdrc");
+    writeFileSync(
+      configPath,
+      JSON.stringify({
+        rules: {
+          "require-trailing-spaces": 2,
+          "space-around-link": 2,
+          "no-multiple-blank-lines": 2,
+        },
+      }),
+      "utf8"
+    );
+  });
+
+  afterEach(() => {
+    rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  test("applies all opt-in rules through stdin fix mode", () => {
+    const stdout = execFileSync(
+      process.execPath,
+      [TSX, CLI, "--stdin", "--fix", "--config", configPath],
+      {
+        input: "甲[链接](https://example.com)乙\n第二行\n\n\n末行\n",
+        encoding: "utf8",
+        stdio: ["pipe", "pipe", "pipe"],
+      }
+    );
+
+    expect(stdout).toBe(
+      "甲 [链接](https://example.com) 乙  \n第二行\n\n末行\n"
+    );
+  });
+});
diff --git a/__tests__/lint-worker.spec.ts b/__tests__/lint-worker.spec.ts
index d3601bd..6878384 100644
--- a/__tests__/lint-worker.spec.ts
+++ b/__tests__/lint-worker.spec.ts
@@ -1,10 +1,11 @@
 import { jest } from "@jest/globals";
 
 jest.mock("@lint-md/core", () => ({
+  fixMarkdown: jest.fn(),
   lintMarkdown: jest.fn(),
 }));
 
-import { lintMarkdown } from "@lint-md/core";
+import { fixMarkdown, lintMarkdown } from "@lint-md/core";
 import lintWorker from "../src/utils/lint-worker";
 import { writeFile, mkdtemp, rm } from "fs/promises";
 import { tmpdir } from "os";
@@ -13,12 +14,16 @@ import * as path from "path";
 const mockedLintMarkdown = lintMarkdown as jest.MockedFunction<
   typeof lintMarkdown
 >;
+const mockedFixMarkdown = fixMarkdown as jest.MockedFunction<
+  typeof fixMarkdown
+>;
 
 describe("lintWorker executionErrors passthrough", () => {
   let tmpDir: string;
 
   beforeEach(async () => {
     tmpDir = await mkdtemp(path.join(tmpdir(), "lint-worker-exec-"));
+    mockedFixMarkdown.mockReset();
     mockedLintMarkdown.mockReset();
   });
 
@@ -76,4 +81,26 @@ describe("lintWorker executionErrors passthrough", () => {
 
     expect(result.executionErrors).toBeUndefined();
   });
+
+  test("uses fixMarkdown for fix mode", async () => {
+    const file = path.join(tmpDir, "fix.md");
+    const rules = { "space-around-link": 2 };
+    await writeFile(file, "甲[链接](https://example.com)乙\n", "utf8");
+
+    mockedFixMarkdown.mockReturnValue({
+      lintResult: [],
+      fixedResult: { result: "甲 [链接](https://example.com) 乙\n" },
+      fixableErrorCount: 0,
+      fixableWarningCount: 0,
+      executionErrors: [],
+    } as any);
+
+    await lintWorker({ filePath: file, rules, isFixMode: true });
+
+    expect(mockedFixMarkdown).toHaveBeenCalledWith(
+      "甲[链接](https://example.com)乙\n",
+      { rules }
+    );
+    expect(mockedLintMarkdown).not.toHaveBeenCalled();
+  });
 });
diff --git a/package.json b/package.json
index ff16362..bea96bb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@lint-md/cli",
-  "version": "2.2.3",
+  "version": "2.2.4",
   "description": "CLI tool to lint your markdown file for Chinese.",
   "main": "lib/index.js",
   "module": "esm/index.js",
@@ -60,7 +60,7 @@
     ]
   },
   "dependencies": {
-    "@lint-md/core": "^2.2.1",
+    "@lint-md/core": "^2.3.0",
     "chalk": "^4",
     "commander": "^9.4.1",
     "glob": "^13.0.6",
diff --git a/src/lint-md.ts b/src/lint-md.ts
index 897cd29..7405a22 100644
--- a/src/lint-md.ts
+++ b/src/lint-md.ts
@@ -8,7 +8,7 @@ const setExitCode = (code: number): void => {
 import { readFileSync } from "fs";
 import { availableParallelism } from "os";
 import { program } from "commander";
-import { lintMarkdown } from "@lint-md/core";
+import { fixMarkdown, lintMarkdown } from "@lint-md/core";
 import { version } from "../package.json";
 import { safeWriteFile } from "./utils/safe-write-file";
 import {
@@ -100,7 +100,7 @@ program
         }
 
         try {
-          const result = lintMarkdown(content, rules, true);
+          const result = fixMarkdown(content, { rules });
           process.stdout.write(result.fixedResult?.result ?? content);
           const stdinItem = {
             path: "(stdin)",
diff --git a/src/types.ts b/src/types.ts
index b982514..8921225 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -40,7 +40,7 @@ export interface CliErrorCount {
 export interface LintWorkerOptions {
   filePath: string;
   rules?: LintMdRulesConfig;
-  isFixMode?: boolean;
+  isFixMode: boolean;
 }
 
 /** batchLint 单个文件的 lint 结果 */
diff --git a/src/utils/lint-worker.ts b/src/utils/lint-worker.ts
index d214e3f..a573afa 100644
--- a/src/utils/lint-worker.ts
+++ b/src/utils/lint-worker.ts
@@ -1,12 +1,14 @@
 import { readFile } from "fs/promises";
-import { lintMarkdown } from "@lint-md/core";
+import { fixMarkdown, lintMarkdown } from "@lint-md/core";
 import type { LintWorkerOptions } from "../types";
 
 const lintWorker = async (options: LintWorkerOptions) => {
   const { filePath, rules, isFixMode } = options;
 
   const content = await readFile(filePath, "utf8");
-  const result = lintMarkdown(content, rules, isFixMode);
+  const result = isFixMode
+    ? fixMarkdown(content, { rules })
+    : lintMarkdown(content, rules, false);
 
   return {
     path: filePath,