diff --git a/README.md b/README.md
index 2eac6ff..dcff2ff 100644
--- a/README.md
+++ b/README.md
@@ -48,3 +48,11 @@ Testing in dummy IDE
 ```$xslt
 $ ./gradlew runide
 ```
+
+Generating config from PHP sources
+------------
+To generate config of this plugin with custom filters, functions and tags from your Latte extensions, use [contrib/CustomSources](contrib/CustomSources/).
+
+* In `contrib/CustomSources/`, run `composer i`.
+* Edit `generate.php` to use your Latte extensions and run it.
+* It will generate `latte.xml` which you can store in the `.idea/` directory of your project.
diff --git a/contrib/CustomSources/.gitignore b/contrib/CustomSources/.gitignore
new file mode 100644
index 0000000..d1502b0
--- /dev/null
+++ b/contrib/CustomSources/.gitignore
@@ -0,0 +1,2 @@
+vendor/
+composer.lock
diff --git a/contrib/CustomSources/composer.json b/contrib/CustomSources/composer.json
new file mode 100644
index 0000000..a5f3ae8
--- /dev/null
+++ b/contrib/CustomSources/composer.json
@@ -0,0 +1,10 @@
+{
+	"autoload": {
+		"psr-4": {
+			"IdeaLatteSupport\\": ["src/"]
+		}
+	},
+	"require": {
+		"latte/latte": "^3.0"
+	}
+}
diff --git a/contrib/CustomSources/generate.php b/contrib/CustomSources/generate.php
new file mode 100644
index 0000000..9a8bb2e
--- /dev/null
+++ b/contrib/CustomSources/generate.php
@@ -0,0 +1,11 @@
+#!/usr/bin/env php
+<?php declare(strict_types=1);
+
+namespace IdeaLatteSupport;
+
+require_once __DIR__ . '/vendor/autoload.php';
+
+$extensions = [new MyLatteExtension()];
+
+file_put_contents('latte.xml', Generator::generate(...$extensions));
+echo "latte.xml saved.\n";
diff --git a/contrib/CustomSources/src/Generator.php b/contrib/CustomSources/src/Generator.php
new file mode 100644
index 0000000..b7d7a2d
--- /dev/null
+++ b/contrib/CustomSources/src/Generator.php
@@ -0,0 +1,59 @@
+<?php declare(strict_types=1);
+
+namespace IdeaLatteSupport;
+
+final class Generator
+{
+
+	public static function generate(\Latte\Extension ...$extensions): string
+	{
+		$filters = [];
+		$functions = [];
+		$tags = [];
+
+		foreach ($extensions as $extension) {
+			$filters += $extension->getFilters();
+			$functions += $extension->getFunctions();
+			$tags += $extension->getTags();
+		}
+
+		$params = [
+			'filters' => self::getCallables($filters),
+			'functions' => self::getCallables($functions),
+			'macros' => [],
+		];
+
+		foreach ($tags as $name => $tag) {
+			$name = preg_replace('~^n:~', '', $name, count: $count) ?? $name;
+			$pair = null;
+			if (is_callable($tag)) {
+				$r = new \ReflectionFunction(\Closure::fromCallable($tag));
+				$pair = (string) $r->getReturnType() === 'Generator' ? 'PAIR' : null;
+			}
+			$params['macros'][$name] = $count === 1 ? 'ATTR_ONLY' : $pair;
+		}
+
+		$latte = new \Latte\Engine();
+		return $latte->renderToString(__DIR__ . '/idea.latte', $params);
+	}
+
+	/**
+	 * @param array<callable(): mixed> $callables
+	 * @return array<array{returns: string, params: string}>
+	 */
+	private static function getCallables(array $callables): array
+	{
+		$return = [];
+
+		foreach ($callables as $name => $callable) {
+			$r = new \ReflectionFunction(\Closure::fromCallable($callable));
+			$return[$name] = [
+				'returns' => (string) $r->getReturnType(),
+				'params' => implode(', ', array_column($r->getParameters(), 'name')),
+			];
+		}
+
+		return $return;
+	}
+
+}
diff --git a/contrib/CustomSources/src/MyLatteExtension.php b/contrib/CustomSources/src/MyLatteExtension.php
new file mode 100644
index 0000000..2873f43
--- /dev/null
+++ b/contrib/CustomSources/src/MyLatteExtension.php
@@ -0,0 +1,34 @@
+<?php declare(strict_types=1);
+
+namespace IdeaLatteSupport;
+
+class MyLatteExtension extends \Latte\Extension
+{
+
+	/** @inheritdoc */
+	public function getTags(): array
+	{
+		return [
+			'normal' => function () {},
+			'n:attrOnly' => function () {},
+			'pair' => function (): \Generator {},
+		];
+	}
+
+	/** @inheritdoc */
+	public function getFilters(): array
+	{
+		return [
+			'myFilter' => function ($param) {},
+		];
+	}
+
+	/** @inheritdoc */
+	public function getFunctions(): array
+	{
+		return [
+			'myFunction' => function ($param): bool {},
+		];
+	}
+
+}
diff --git a/contrib/CustomSources/src/idea.latte b/contrib/CustomSources/src/idea.latte
new file mode 100644
index 0000000..b475f7d
--- /dev/null
+++ b/contrib/CustomSources/src/idea.latte
@@ -0,0 +1,21 @@
+{contentType xml}
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+	<component name="LattePluginSettings">
+		<customMacroSettings>
+			<list>
+				<LatteTagSettings n:foreach="$macros as $name => $type" n:attr="MacroType: $type" MacroName="{$name}" />
+			</list>
+		</customMacroSettings>
+		<customModifierSettings>
+			<list>
+				<LatteFilterSettings n:foreach="$filters as $name => $info" ModifierName="{$name}" ModifierHelp="{$info[params]}" />
+			</list>
+		</customModifierSettings>
+		<customFunctionSettings>
+			<list>
+				<LatteFunctionSettings n:foreach="$functions as $name => $info" FunctionReturnType="{$info[returns]}" FunctionName="{$name}" FunctionHelp="({$info[params]})" />
+			</list>
+		</customFunctionSettings>
+	</component>
+</project>