diff --git a/lib/node_modules/@stdlib/string/base/concat/README.md b/lib/node_modules/@stdlib/string/base/concat/README.md
new file mode 100644
index 000000000000..ff2986dff57d
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/README.md
@@ -0,0 +1,114 @@
+
+
+# concat
+
+> Concatenate two strings.
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var concat = require( '@stdlib/string/base/concat' );
+```
+
+#### concat( str1, str2 )
+
+Concatenates two strings.
+
+```javascript
+var str = concat( 'hello', 'world' );
+// returns 'helloworld'
+```
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var concat = require( '@stdlib/string/base/concat' );
+
+var str = concat( 'hello', 'world' );
+// returns 'helloworld'
+
+str = concat( 'foo', 'bar' );
+// returns 'foobar'
+
+str = concat( 'beep', ' boop' );
+// returns 'beep boop'
+
+str = concat( '', 'baz' );
+// returns 'baz'
+
+str = concat( 'qux', '' );
+// returns 'qux'
+
+str = concat( '', '' );
+// returns ''
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[@stdlib/string/base/lowercase]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/string/base/lowercase
+
+[@stdlib/string/base/uppercase]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/string/base/uppercase
+
+
+
+
+
+
+
diff --git a/lib/node_modules/@stdlib/string/base/concat/benchmark/benchmark.js b/lib/node_modules/@stdlib/string/base/concat/benchmark/benchmark.js
new file mode 100644
index 000000000000..eb295b045be1
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/benchmark/benchmark.js
@@ -0,0 +1,81 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
+var pkg = require( './../package.json' ).name;
+var concat = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var values;
+ var out;
+ var i;
+
+ values = [
+ [ 'hello', 'world' ],
+ [ 'foo', 'bar' ],
+ [ 'beep', 'boop' ]
+ ];
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = concat(values[ i%values.length ][ 0 ], values[ i%values.length ][ 1 ]);
+ if ( typeof out !== 'string' ) {
+ b.fail( 'should return a string' );
+ }
+ }
+ b.toc();
+ if ( !isString( out ) ) {
+ b.fail( 'should return a string' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
+
+bench( pkg+'::builtin', function benchmark( b ) {
+ var values;
+ var out;
+ var i;
+
+ values = [
+ [ 'hello', 'world' ],
+ [ 'foo', 'bar' ],
+ [ 'beep', 'boop' ]
+ ];
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = values[ i%values.length ][ 0 ].concat(values[ i%values.length ][ 1 ]);
+ if ( typeof out !== 'string' ) {
+ b.fail( 'should return a string' );
+ }
+ }
+ b.toc();
+ if ( !isString( out ) ) {
+ b.fail( 'should return a string' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/string/base/concat/docs/repl.txt b/lib/node_modules/@stdlib/string/base/concat/docs/repl.txt
new file mode 100644
index 000000000000..7977f1302f99
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/docs/repl.txt
@@ -0,0 +1,29 @@
+
+{{alias}}( str1, str2 )
+ Concatenates two strings.
+
+ Parameters
+ ----------
+ str1: string
+ First input string.
+
+ str2: string
+ Second input string.
+
+ Returns
+ -------
+ out: string
+ Concatenated string.
+
+ Examples
+ --------
+ > var out = {{alias}}( 'hello', 'world' )
+ 'helloworld'
+ > out = {{alias}}( 'foo', 'bar' )
+ 'foobar'
+ > out = {{alias}}( '', 'baz' )
+ 'baz'
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/string/base/concat/docs/types/index.d.ts b/lib/node_modules/@stdlib/string/base/concat/docs/types/index.d.ts
new file mode 100644
index 000000000000..df61b61db496
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/docs/types/index.d.ts
@@ -0,0 +1,38 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Concatenates two strings.
+*
+* @param str1 - first string
+* @param str2 - second string
+* @returns concatenated string
+*
+* @example
+* var str = concat( 'hello', 'world' );
+* // returns 'helloworld'
+*/
+declare function concat( str1: string, str2: string ): string;
+
+
+// EXPORTS //
+
+export = concat;
+
diff --git a/lib/node_modules/@stdlib/string/base/concat/docs/types/test.ts b/lib/node_modules/@stdlib/string/base/concat/docs/types/test.ts
new file mode 100644
index 000000000000..828d6a80ea27
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/docs/types/test.ts
@@ -0,0 +1,56 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import concat = require( './index' );
+
+
+// TESTS //
+
+// The function returns a string...
+{
+ concat( 'hello', 'world' ); // $ExpectType string
+ concat( 'foo', 'bar' ); // $ExpectType string
+ concat( 'beep' as string, 'boop' as string ); // $ExpectType string
+}
+
+// The compiler throws an error if the function is provided a value other than a string...
+{
+ concat( true, 'world' ); // $ExpectError
+ concat( false, 'world' ); // $ExpectError
+ concat( null, 'world' ); // $ExpectError
+ concat( undefined, 'world' ); // $ExpectError
+ concat( 5, 'world' ); // $ExpectError
+ concat( [], 'world' ); // $ExpectError
+ concat( {}, 'world' ); // $ExpectError
+ concat( ( x: number ): number => x, 'world' ); // $ExpectError
+ concat( 'hello', true ); // $ExpectError
+ concat( 'hello', false ); // $ExpectError
+ concat( 'hello', null ); // $ExpectError
+ concat( 'hello', undefined ); // $ExpectError
+ concat( 'hello', 5 ); // $ExpectError
+ concat( 'hello', [] ); // $ExpectError
+ concat( 'hello', {} ); // $ExpectError
+ concat( 'hello', ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+ concat(); // $ExpectError
+ concat( 'hello' ); // $ExpectError
+}
+
diff --git a/lib/node_modules/@stdlib/string/base/concat/examples/index.js b/lib/node_modules/@stdlib/string/base/concat/examples/index.js
new file mode 100644
index 000000000000..7057240030c1
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/examples/index.js
@@ -0,0 +1,45 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var concat = require( './../lib' );
+
+var str = concat( 'hello', 'world' );
+console.log( str );
+// => 'helloworld'
+
+str = concat( 'foo', 'bar' );
+console.log( str );
+// => 'foobar'
+
+str = concat( 'beep', ' boop' );
+console.log( str );
+// => 'beep boop'
+
+str = concat( '', 'baz' );
+console.log( str );
+// => 'baz'
+
+str = concat( 'qux', '' );
+console.log( str );
+// => 'qux'
+
+str = concat( '', '' );
+console.log( str );
+// => ''
diff --git a/lib/node_modules/@stdlib/string/base/concat/lib/index.js b/lib/node_modules/@stdlib/string/base/concat/lib/index.js
new file mode 100644
index 000000000000..2a1bdffd4e74
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/lib/index.js
@@ -0,0 +1,40 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* Concatenate two strings.
+*
+* @module @stdlib/string/base/concat
+*
+* @example
+* var concat = require( '@stdlib/string/base/concat' );
+*
+* var str = concat( 'hello', 'world' );
+* // returns 'helloworld'
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/string/base/concat/lib/main.js b/lib/node_modules/@stdlib/string/base/concat/lib/main.js
new file mode 100644
index 000000000000..ec1af93a6e31
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/lib/main.js
@@ -0,0 +1,41 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MAIN //
+
+/**
+* Concatenates two strings.
+*
+* @param {string} str1 - first string
+* @param {string} str2 - second string
+* @returns {string} concatenated string
+*
+* @example
+* var str = concat( 'hello', 'world' );
+* // returns 'helloworld'
+*/
+function concat( str1, str2 ) {
+ return str1.concat( str2 );
+}
+
+
+// EXPORTS //
+
+module.exports = concat;
diff --git a/lib/node_modules/@stdlib/string/base/concat/package.json b/lib/node_modules/@stdlib/string/base/concat/package.json
new file mode 100644
index 000000000000..22168a574576
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/package.json
@@ -0,0 +1,65 @@
+{
+ "name": "@stdlib/string/base/concat",
+ "version": "0.0.0",
+ "description": "Concatenate two strings.",
+ "license": "Apache-2.0",
+ "author": {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ },
+ "contributors": [
+ {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ }
+ ],
+ "main": "./lib",
+ "directories": {
+ "benchmark": "./benchmark",
+ "doc": "./docs",
+ "example": "./examples",
+ "lib": "./lib",
+ "test": "./test"
+ },
+ "types": "./docs/types",
+ "scripts": {},
+ "homepage": "https://github.com/stdlib-js/stdlib",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/stdlib-js/stdlib.git"
+ },
+ "bugs": {
+ "url": "https://github.com/stdlib-js/stdlib/issues"
+ },
+ "dependencies": {},
+ "devDependencies": {},
+ "engines": {
+ "node": ">=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "stdstring",
+ "utilities",
+ "utility",
+ "utils",
+ "util",
+ "base",
+ "concat",
+ "concatenate",
+ "join",
+ "string",
+ "str"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/string/base/concat/test/test.js b/lib/node_modules/@stdlib/string/base/concat/test/test.js
new file mode 100644
index 000000000000..287b49eddb3b
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/base/concat/test/test.js
@@ -0,0 +1,90 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var concat = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof concat, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function concatenates two strings', function test( t ) {
+ var expected;
+ var actual;
+ var str1;
+ var str2;
+
+ str1 = 'hello';
+ str2 = 'world';
+ expected = 'helloworld';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'concatenates strings' );
+
+ str1 = 'foo';
+ str2 = 'bar';
+ expected = 'foobar';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'concatenates strings' );
+
+ str1 = '';
+ str2 = 'baz';
+ expected = 'baz';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'handles empty first string' );
+
+ str1 = 'qux';
+ str2 = '';
+ expected = 'qux';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'handles empty second string' );
+
+ str1 = '';
+ str2 = '';
+ expected = '';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'handles both empty strings' );
+
+ str1 = 'a';
+ str2 = 'b';
+ expected = 'ab';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'handles single character strings' );
+
+ str1 = 'beep';
+ str2 = ' boop';
+ expected = 'beep boop';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'handles strings with spaces' );
+
+ str1 = '$**_';
+ str2 = 'beep_**$';
+ expected = '$**_beep_**$';
+ actual = concat( str1, str2 );
+ t.strictEqual( actual, expected, 'handles strings with special characters' );
+
+ t.end();
+});