diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/README.md b/lib/node_modules/@stdlib/plot/vega/signal/names/README.md
new file mode 100644
index 000000000000..798e8abe7482
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/README.md
@@ -0,0 +1,133 @@
+
+
+# signals
+
+> List of reserved Vega signal names.
+
+
+
+
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var signals = require( '@stdlib/plot/vega/signal/names' );
+```
+
+#### signals( \[kind] )
+
+Returns a list of reserved signal names.
+
+```javascript
+var out = signals();
+// e.g., returns [ 'datum', 'event', ... ]
+```
+
+The function has the following parameters:
+
+- **kind**: signal kind. Must be one of the following:
+
+ - `'all'`: all signal names (default).
+ - `'reserved'`: reserved signal names.
+ - `'built_in'`: built-in signal names.
+ - `'special'`: special signal names.
+
+By default, the function returns all signal names. To return only those signals of a specified kind, provide a `kind` argument.
+
+```javascript
+var out = signals( 'reserved' );
+// e.g., returns [ 'datum', 'event', 'item', 'parent' ]
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var contains = require( '@stdlib/array/base/assert/contains' ).factory;
+var signals = require( '@stdlib/plot/vega/signal/names' );
+
+var isSignal = contains( signals() );
+
+var bool = isSignal( 'datum' );
+// returns true
+
+bool = isSignal( 'width' );
+// returns true
+
+bool = isSignal( 'beep' );
+// returns false
+
+bool = isSignal( 'boop' );
+// returns false
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/benchmark/benchmark.js b/lib/node_modules/@stdlib/plot/vega/signal/names/benchmark/benchmark.js
new file mode 100644
index 000000000000..ac67efc67a93
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/benchmark/benchmark.js
@@ -0,0 +1,105 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
+var pkg = require( './../package.json' ).name;
+var signals = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var out;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = signals();
+ if ( out.length < 2 ) {
+ b.fail( 'should return an array' );
+ }
+ }
+ b.toc();
+ if ( !isStringArray( out ) ) {
+ b.fail( 'should return an array of strings' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
+
+bench( pkg+':kind=reserved', function benchmark( b ) {
+ var out;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = signals( 'reserved' );
+ if ( out.length < 2 ) {
+ b.fail( 'should return an array' );
+ }
+ }
+ b.toc();
+ if ( !isStringArray( out ) ) {
+ b.fail( 'should return an array of strings' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
+
+bench( pkg+':kind=built_in', function benchmark( b ) {
+ var out;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = signals( 'built_in' );
+ if ( out.length < 2 ) {
+ b.fail( 'should return an array' );
+ }
+ }
+ b.toc();
+ if ( !isStringArray( out ) ) {
+ b.fail( 'should return an array of strings' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
+
+bench( pkg+':kind=special', function benchmark( b ) {
+ var out;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = signals( 'special' );
+ if ( out.length < 1 ) {
+ b.fail( 'should return an array' );
+ }
+ }
+ b.toc();
+ if ( !isStringArray( out ) ) {
+ b.fail( 'should return an array of strings' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/docs/repl.txt b/lib/node_modules/@stdlib/plot/vega/signal/names/docs/repl.txt
new file mode 100644
index 000000000000..f19cc5bec98d
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/docs/repl.txt
@@ -0,0 +1,29 @@
+
+{{alias}}( [kind] )
+ Returns a list of reserved signal names.
+
+ Parameters
+ ----------
+ kind: string (optional)
+ Signal kind. Must be one of the following:
+
+ - all: all signal names (default).
+ - reserved: reserved signal names.
+ - built_in: built-in signal names.
+ - special: special signal names.
+
+ Returns
+ -------
+ out: Array
+ List of signal names.
+
+ Examples
+ --------
+ > var out = {{alias}}()
+ e.g., [ 'datum', 'event', ... ]
+ > out = {{alias}}( 'reserved' )
+ [ 'datum', 'event', ... ]
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/docs/types/index.d.ts b/lib/node_modules/@stdlib/plot/vega/signal/names/docs/types/index.d.ts
new file mode 100644
index 000000000000..f566b2a6b1fc
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/docs/types/index.d.ts
@@ -0,0 +1,45 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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
+
+/**
+* Signal kind.
+*/
+type SignalKind = 'all' | 'reserved' | 'built_in' | 'special';
+
+/**
+* Returns a list of reserved signal names.
+*
+* @param kind - signal kind
+* @returns list of signal names
+*
+* @example
+* var out = signals();
+* // e.g., returns [ 'datum', 'event', ... ]
+*
+* @example
+* var list = signals( 'reserved' );
+* // e.g., returns [ 'datum', 'event', ... ]
+*/
+declare function signals( kind?: SignalKind ): Array;
+
+
+// EXPORTS //
+
+export = signals;
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/docs/types/test.ts b/lib/node_modules/@stdlib/plot/vega/signal/names/docs/types/test.ts
new file mode 100644
index 000000000000..9d245f3a021d
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/docs/types/test.ts
@@ -0,0 +1,51 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 signals = require( './index' );
+
+
+// TESTS //
+
+// The function returns an array of strings when not provided any arguments...
+{
+ signals(); // $ExpectType string[]
+}
+
+// The function returns an array of strings when provided a recognized signal kind...
+{
+ signals( 'all' ); // $ExpectType string[]
+ signals( 'reserved' ); // $ExpectType string[]
+ signals( 'built_in' ); // $ExpectType string[]
+ signals( 'special' ); // $ExpectType string[]
+}
+
+// The compiler throws an error if the function is provided an invalid first argument...
+{
+ signals( 5 ); // $ExpectError
+ signals( true ); // $ExpectError
+ signals( false ); // $ExpectError
+ signals( null ); // $ExpectError
+ signals( [] ); // $ExpectError
+ signals( {} ); // $ExpectError
+ signals( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+ signals( 'reserved', {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/examples/index.js b/lib/node_modules/@stdlib/plot/vega/signal/names/examples/index.js
new file mode 100644
index 000000000000..832b3f7e7a09
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/examples/index.js
@@ -0,0 +1,40 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 contains = require( '@stdlib/array/base/assert/contains' ).factory;
+var signals = require( './../lib' );
+
+var isSignal = contains( signals() );
+
+var bool = isSignal( 'datum' );
+console.log( bool );
+// => true
+
+bool = isSignal( 'width' );
+console.log( bool );
+// => true
+
+bool = isSignal( 'beep' );
+console.log( bool );
+// => false
+
+bool = isSignal( 'boop' );
+console.log( bool );
+// => false
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/lib/data.json b/lib/node_modules/@stdlib/plot/vega/signal/names/lib/data.json
new file mode 100644
index 000000000000..ef70af47261e
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/lib/data.json
@@ -0,0 +1,32 @@
+{
+ "all": [
+ "datum",
+ "event",
+ "item",
+ "parent",
+
+ "width",
+ "height",
+ "padding",
+ "autosize",
+ "background",
+
+ "cursor"
+ ],
+ "reserved": [
+ "datum",
+ "event",
+ "item",
+ "parent"
+ ],
+ "built_in": [
+ "width",
+ "height",
+ "padding",
+ "autosize",
+ "background"
+ ],
+ "special": [
+ "cursor"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/lib/index.js b/lib/node_modules/@stdlib/plot/vega/signal/names/lib/index.js
new file mode 100644
index 000000000000..9bcdf3ed5891
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/lib/index.js
@@ -0,0 +1,40 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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';
+
+/**
+* Return a list of reserved signal names.
+*
+* @module @stdlib/plot/vega/signal/names
+*
+* @example
+* var signals = require( '@stdlib/plot/vega/signal/names' );
+*
+* var out = signals();
+* // e.g., returns [ 'datum', 'event', ... ]
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/lib/main.js b/lib/node_modules/@stdlib/plot/vega/signal/names/lib/main.js
new file mode 100644
index 000000000000..c957c54243b5
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/lib/main.js
@@ -0,0 +1,54 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 DATA = require( './data.json' );
+
+
+// MAIN //
+
+/**
+* Returns a list of reserved signal names.
+*
+* @param {string} [kind] - signal kind
+* @returns {StringArray} list of reserved signal names
+*
+* @example
+* var out = signals();
+* // e.g., returns [ 'datum', 'event', ... ]
+*
+* @example
+* var list = signals( 'reserved' );
+* // e.g., returns [ 'datum', 'event', ... ]
+*/
+function signals( kind ) {
+ var v;
+ if ( arguments.length ) {
+ v = DATA[ kind ];
+ return ( v ) ? v.slice() : [];
+ }
+ return DATA.all.slice();
+}
+
+
+// EXPORTS //
+
+module.exports = signals;
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/package.json b/lib/node_modules/@stdlib/plot/vega/signal/names/package.json
new file mode 100644
index 000000000000..e0068f11b556
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/package.json
@@ -0,0 +1,62 @@
+{
+ "name": "@stdlib/plot/vega/signal/names",
+ "version": "0.0.0",
+ "description": "List of reserved Vega signal names.",
+ "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",
+ "plot",
+ "vega",
+ "signals",
+ "utilities",
+ "utility",
+ "utils",
+ "util"
+ ],
+ "__stdlib__": {}
+}
diff --git a/lib/node_modules/@stdlib/plot/vega/signal/names/test/test.js b/lib/node_modules/@stdlib/plot/vega/signal/names/test/test.js
new file mode 100644
index 000000000000..c5ecc3ea5e30
--- /dev/null
+++ b/lib/node_modules/@stdlib/plot/vega/signal/names/test/test.js
@@ -0,0 +1,127 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 signals = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof signals, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function returns a list of signal names (default)', function test( t ) {
+ var expected;
+ var actual;
+
+ expected = [
+ 'datum',
+ 'event',
+ 'item',
+ 'parent',
+
+ 'width',
+ 'height',
+ 'padding',
+ 'autosize',
+ 'background',
+
+ 'cursor'
+ ];
+ actual = signals();
+
+ t.deepEqual( actual, expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns a list of signal names (kind=all)', function test( t ) {
+ var expected;
+ var actual;
+
+ expected = [
+ 'datum',
+ 'event',
+ 'item',
+ 'parent',
+
+ 'width',
+ 'height',
+ 'padding',
+ 'autosize',
+ 'background',
+
+ 'cursor'
+ ];
+ actual = signals( 'all' );
+
+ t.deepEqual( actual, expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns a list of reserved signal names (kind=reserved)', function test( t ) {
+ var expected;
+ var actual;
+
+ expected = [
+ 'datum',
+ 'event',
+ 'item',
+ 'parent'
+ ];
+ actual = signals( 'reserved' );
+
+ t.deepEqual( actual, expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns a list of signal names (kind=built_in)', function test( t ) {
+ var expected;
+ var actual;
+
+ expected = [
+ 'width',
+ 'height',
+ 'padding',
+ 'autosize',
+ 'background'
+ ];
+ actual = signals( 'built_in' );
+
+ t.deepEqual( actual, expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns a list of signal names (kind=special)', function test( t ) {
+ var expected;
+ var actual;
+
+ expected = [
+ 'cursor'
+ ];
+ actual = signals( 'special' );
+
+ t.deepEqual( actual, expected, 'returns expected value' );
+ t.end();
+});