diff --git a/README.md b/README.md
index a846be3..a7d895f 100644
--- a/README.md
+++ b/README.md
@@ -4,28 +4,21 @@ Textwrap for JavaScript/Node.js.
 Correctly handles wide characters (宽字符) and emojis (😃).  
 Optionally break words when wrapping strings. Preserves ANSI escape codes.
 
-## Why?
+## Packages in this repo
 
-JavaScript's `String.length` counts code units, not visual terminal width.  
-Wide characters (CJK) and many emoji occupy 2 columns but have length 1.  
-This package wraps text to a target **visual** width using `wcwidth`.
+| Install | Package | What you get |
+|---------|---------|----------------|
+| `npm install smartwrap` | **smartwrap** (this package) | Core library only — **no CLI, no `yargs`** |
+| `npm install -g smartwrap-cli` | [smartwrap-cli](./packages/smartwrap-cli) | `smartwrap` binary |
 
-## Installation
+Library users who only need wrapping no longer pull in CLI dependencies ([#19](https://github.com/tecfu/smartwrap/issues/19)).
 
-```bash
-npm install smartwrap
-```
-
-CLI (global):
+## Installation (library)
 
 ```bash
-npm install -g smartwrap
+npm install smartwrap
 ```
 
-## Node module
-
-### Wide character wrapping
-
 ```js
 const smartwrap = require('smartwrap')
 console.log(smartwrap('宽字符', { width: 2 }))
@@ -34,24 +27,14 @@ console.log(smartwrap('宽字符', { width: 2 }))
 // 符
 ```
 
-### Word wrapping (default)
-
 ```js
-console.log(smartwrap('break at word', {
-  width: 10,
-  breakword: false // default
-}))
+console.log(smartwrap('break at word', { width: 10 }))
 // break at
 // word
 ```
 
-### Force-break long words
-
 ```js
-console.log(smartwrap('break at word', {
-  width: 10,
-  breakword: true
-}))
+console.log(smartwrap('break at word', { width: 10, breakword: true }))
 // break at w
 // ord
 ```
@@ -72,41 +55,35 @@ console.log(smartwrap('break at word', {
 ## CLI
 
 ```bash
+npm install -g smartwrap-cli
 echo "somestring you want to wrap" | smartwrap --width=3 --paddingLeft=1
+smartwrap --help
 ```
 
-```
- so
- me
- st
- ri
- ng
- yo
- u
- wa
- nt
- to
- wr
- ap
-```
-
-Run `smartwrap --help` for all flags.
-
 ## Breaking changes in 3.0.0
 
 - **Node.js ≥ 12** required (native `Array.prototype.flat`).
-- Removed unused `grapheme-splitter` and the `array.prototype.flat` polyfill (eliminates ~50 transitive dependencies).
-- Updated `yargs` and other dependencies.
-- CLI now correctly passes `breakword` and `errorChar`.
-- Test runner switched from Grunt to plain Mocha.
-- Minor code cleanups (fixed undeclared variable, modernized style).
+- **CLI moved** to the separate package `smartwrap-cli`.  
+  `npm install smartwrap` no longer installs `yargs` or the `smartwrap` binary.
+- Removed unused `grapheme-splitter` and the `array.prototype.flat` polyfill.
+- CLI options (`breakword`, `errorChar`, etc.) are forwarded correctly in `smartwrap-cli`.
+- Test runner switched from Grunt to Mocha.
 
-Existing wrapping behavior for supported inputs is intentionally preserved.
+## Development
 
-## Compatibility
+```bash
+npm install
+npm test
+```
+
+To exercise the CLI locally against this checkout:
 
-- Node.js ≥ 12
-- CommonJS
+```bash
+cd packages/smartwrap-cli
+npm install
+npm link ../..          # or: npm install file:../..
+# then: echo "宽字符" | node src/terminal-adapter.js -w 2
+```
 
 ## License
 
diff --git a/package.json b/package.json
index 3916675..f0c16bd 100644
--- a/package.json
+++ b/package.json
@@ -6,14 +6,10 @@
   "engines": {
     "node": ">=12"
   },
-  "bin": {
-    "smartwrap": "src/terminal-adapter.js"
-  },
   "scripts": {
     "test": "mocha test/test.js",
     "test-display": "mocha test/test.js --require test/display-hook.js",
-    "lint": "eslint src/",
-    "lint-fix": "eslint src/ --fix"
+    "lint": "eslint src/ packages/smartwrap-cli/src/"
   },
   "repository": {
     "type": "git",
@@ -32,8 +28,7 @@
   "dependencies": {
     "breakword": "^1.0.5",
     "strip-ansi": "^6.0.1",
-    "wcwidth": "^1.0.1",
-    "yargs": "^17.7.2"
+    "wcwidth": "^1.0.1"
   },
   "devDependencies": {
     "chai": "^4.3.10",
diff --git a/packages/smartwrap-cli/LICENSE b/packages/smartwrap-cli/LICENSE
new file mode 100644
index 0000000..d13cc4b
--- /dev/null
+++ b/packages/smartwrap-cli/LICENSE
@@ -0,0 +1,19 @@
+The MIT License (MIT)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/packages/smartwrap-cli/README.md b/packages/smartwrap-cli/README.md
new file mode 100644
index 0000000..921e691
--- /dev/null
+++ b/packages/smartwrap-cli/README.md
@@ -0,0 +1,22 @@
+# smartwrap-cli
+
+Command-line interface for [smartwrap](https://www.npmjs.com/package/smartwrap).
+
+## Install
+
+```bash
+npm install -g smartwrap-cli
+```
+
+For library-only use (no CLI, no `yargs`), install [`smartwrap`](https://www.npmjs.com/package/smartwrap) instead.
+
+## Usage
+
+```bash
+echo "somestring you want to wrap" | smartwrap --width=3 --paddingLeft=1
+smartwrap --help
+```
+
+## License
+
+MIT
diff --git a/packages/smartwrap-cli/package.json b/packages/smartwrap-cli/package.json
new file mode 100644
index 0000000..b230670
--- /dev/null
+++ b/packages/smartwrap-cli/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "smartwrap-cli",
+  "version": "3.0.0",
+  "description": "CLI for smartwrap — text wrapping with wide-character and emoji support",
+  "bin": {
+    "smartwrap": "src/terminal-adapter.js"
+  },
+  "engines": {
+    "node": ">=12"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/tecfu/smartwrap.git",
+    "directory": "packages/smartwrap-cli"
+  },
+  "keywords": [
+    "smartwrap",
+    "wordwrap",
+    "cli",
+    "terminal"
+  ],
+  "author": "tecfu",
+  "license": "MIT",
+  "dependencies": {
+    "smartwrap": "^3.0.0",
+    "yargs": "^17.7.2"
+  },
+  "files": [
+    "src/",
+    "LICENSE",
+    "README.md"
+  ]
+}
diff --git a/src/terminal-adapter.js b/packages/smartwrap-cli/src/terminal-adapter.js
similarity index 97%
rename from src/terminal-adapter.js
rename to packages/smartwrap-cli/src/terminal-adapter.js
index 2c6520d..17f3594 100755
--- a/src/terminal-adapter.js
+++ b/packages/smartwrap-cli/src/terminal-adapter.js
@@ -1,7 +1,7 @@
 #!/usr/bin/env node
 'use strict'
 
-const smartwrap = require('./main.js')
+const smartwrap = require('smartwrap')
 const yargs = require('yargs')
 
 yargs
diff --git a/test/test.js b/test/test.js
index 4e3c13b..93b220d 100644
--- a/test/test.js
+++ b/test/test.js
@@ -7,7 +7,7 @@ const chai = require('chai');
 const expect = chai.expect;
 const assert = chai.assert;
 const should = chai.should();
-const smartwrap = require("../");
+const smartwrap = require("..");
 const data = require("./data")
 
 let test = function(testResult,savedResult){