diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 232565c..44a0c66 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -7,7 +7,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [8.1, 8.2, 8.3, 8.4, 8.5]
+        # PHP v8.5 has issues with Phan 5.5.1
+        # Method SplObjectStorage::attach() is deprecated since 8.5, use method SplObjectStorage::offsetSet() instead
+        php: [8.1, 8.2, 8.3, 8.4]
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -28,3 +30,6 @@ jobs:
 
       - name: Run tests
         run: php ./vendor/bin/phpunit
+
+      - name: Running phan
+        run: composer run-script phan
diff --git a/.phan/config.php b/.phan/config.php
new file mode 100644
index 0000000..9933d02
--- /dev/null
+++ b/.phan/config.php
@@ -0,0 +1,2 @@
+<?php
+return require __DIR__ . '/../vendor/mediawiki/mediawiki-phan-config/src/config.php';
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 29ab31f..2bdbea6 100644
--- a/composer.json
+++ b/composer.json
@@ -37,6 +37,7 @@
 		"ext-curl": "*",
 		"phpunit/phpunit": "9.6.20",
 		"mediawiki/mediawiki-codesniffer": "48.0.0",
+		"mediawiki/mediawiki-phan-config": "0.17.0",
 		"mustangostang/spyc": "0.6.3",
 		"mhujer/yaml-sort-checker": "^1.5"
 	},
@@ -55,11 +56,13 @@
 		"fix": "phpcbf",
 		"cs": "phpcs -sp",
 		"yaml-sort-check": "yaml-sort-checker",
+		"phan": "phan -d . --long-progress-bar",
 		"test": [
 			"@composer validate --no-interaction",
 			"phpunit",
 			"@cs",
-			"@yaml-sort-check"
+			"@yaml-sort-check",
+			"@phan"
 		]
 	},
 	"config": {
diff --git a/composer.lock b/composer.lock
index 2433943..be18818 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,9 +4,88 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "050079c706ed6014be8bbd9692bda7e0",
+    "content-hash": "b5d42e187db6548ed349a7e2deb82d58",
     "packages": [],
     "packages-dev": [
+        {
+            "name": "composer/pcre",
+            "version": "3.3.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/pcre.git",
+                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/pcre/zipball/b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
+                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ^8.0"
+            },
+            "conflict": {
+                "phpstan/phpstan": "<1.11.10"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.12 || ^2",
+                "phpstan/phpstan-strict-rules": "^1 || ^2",
+                "phpunit/phpunit": "^8 || ^9"
+            },
+            "type": "library",
+            "extra": {
+                "phpstan": {
+                    "includes": [
+                        "extension.neon"
+                    ]
+                },
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Composer\\Pcre\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
+                }
+            ],
+            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
+            "keywords": [
+                "PCRE",
+                "preg",
+                "regex",
+                "regular expression"
+            ],
+            "support": {
+                "issues": "https://github.com/composer/pcre/issues",
+                "source": "https://github.com/composer/pcre/tree/3.3.2"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2024-11-12T16:29:46+00:00"
+        },
         {
             "name": "composer/semver",
             "version": "3.4.4",
@@ -164,6 +243,72 @@
             ],
             "time": "2025-05-12T21:07:07+00:00"
         },
+        {
+            "name": "composer/xdebug-handler",
+            "version": "3.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/xdebug-handler.git",
+                "reference": "6c1925561632e83d60a44492e0b344cf48ab85ef"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/6c1925561632e83d60a44492e0b344cf48ab85ef",
+                "reference": "6c1925561632e83d60a44492e0b344cf48ab85ef",
+                "shasum": ""
+            },
+            "require": {
+                "composer/pcre": "^1 || ^2 || ^3",
+                "php": "^7.2.5 || ^8.0",
+                "psr/log": "^1 || ^2 || ^3"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.0",
+                "phpstan/phpstan-strict-rules": "^1.1",
+                "phpunit/phpunit": "^8.5 || ^9.6 || ^10.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Composer\\XdebugHandler\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "John Stevenson",
+                    "email": "john-stevenson@blueyonder.co.uk"
+                }
+            ],
+            "description": "Restarts a process without Xdebug.",
+            "keywords": [
+                "Xdebug",
+                "performance"
+            ],
+            "support": {
+                "irc": "ircs://irc.libera.chat:6697/composer",
+                "issues": "https://github.com/composer/xdebug-handler/issues",
+                "source": "https://github.com/composer/xdebug-handler/tree/3.0.5"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2024-05-06T16:37:16+00:00"
+        },
         {
             "name": "dealerdirect/phpcodesniffer-composer-installer",
             "version": "v1.2.0",
@@ -260,6 +405,54 @@
             ],
             "time": "2025-11-11T04:32:07+00:00"
         },
+        {
+            "name": "doctrine/deprecations",
+            "version": "1.1.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/deprecations.git",
+                "reference": "459c2f5dd3d6a4633d3b5f46ee2b1c40f57d3f38"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/deprecations/zipball/459c2f5dd3d6a4633d3b5f46ee2b1c40f57d3f38",
+                "reference": "459c2f5dd3d6a4633d3b5f46ee2b1c40f57d3f38",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0"
+            },
+            "conflict": {
+                "phpunit/phpunit": "<=7.5 || >=13"
+            },
+            "require-dev": {
+                "doctrine/coding-standard": "^9 || ^12 || ^13",
+                "phpstan/phpstan": "1.4.10 || 2.1.11",
+                "phpstan/phpstan-phpunit": "^1.0 || ^2",
+                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.6 || ^10.5 || ^11.5 || ^12",
+                "psr/log": "^1 || ^2 || ^3"
+            },
+            "suggest": {
+                "psr/log": "Allows logging deprecations via PSR-3 logger implementation"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Deprecations\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "A small layer on top of trigger_error(E_USER_DEPRECATED) or PSR-3 logging with options to disable all deprecations or selectively for packages.",
+            "homepage": "https://www.doctrine-project.org/",
+            "support": {
+                "issues": "https://github.com/doctrine/deprecations/issues",
+                "source": "https://github.com/doctrine/deprecations/tree/1.1.5"
+            },
+            "time": "2025-04-07T20:06:18+00:00"
+        },
         {
             "name": "doctrine/instantiator",
             "version": "2.0.0",
@@ -330,6 +523,51 @@
             ],
             "time": "2022-12-30T00:23:10+00:00"
         },
+        {
+            "name": "felixfbecker/advanced-json-rpc",
+            "version": "v3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/felixfbecker/php-advanced-json-rpc.git",
+                "reference": "b5f37dbff9a8ad360ca341f3240dc1c168b45447"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/felixfbecker/php-advanced-json-rpc/zipball/b5f37dbff9a8ad360ca341f3240dc1c168b45447",
+                "reference": "b5f37dbff9a8ad360ca341f3240dc1c168b45447",
+                "shasum": ""
+            },
+            "require": {
+                "netresearch/jsonmapper": "^1.0 || ^2.0 || ^3.0 || ^4.0",
+                "php": "^7.1 || ^8.0",
+                "phpdocumentor/reflection-docblock": "^4.3.4 || ^5.0.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^7.0 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "AdvancedJsonRpc\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "ISC"
+            ],
+            "authors": [
+                {
+                    "name": "Felix Becker",
+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "A more advanced JSONRPC implementation",
+            "support": {
+                "issues": "https://github.com/felixfbecker/php-advanced-json-rpc/issues",
+                "source": "https://github.com/felixfbecker/php-advanced-json-rpc/tree/v3.2.1"
+            },
+            "time": "2021-06-11T22:34:44+00:00"
+        },
         {
             "name": "mediawiki/mediawiki-codesniffer",
             "version": "v48.0.0",
@@ -382,6 +620,126 @@
             },
             "time": "2025-09-04T20:12:57+00:00"
         },
+        {
+            "name": "mediawiki/mediawiki-phan-config",
+            "version": "0.17.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/wikimedia/mediawiki-tools-phan.git",
+                "reference": "5e98f0ae2755650c6bebb682c0fcc06b371745c9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/wikimedia/mediawiki-tools-phan/zipball/5e98f0ae2755650c6bebb682c0fcc06b371745c9",
+                "reference": "5e98f0ae2755650c6bebb682c0fcc06b371745c9",
+                "shasum": ""
+            },
+            "require": {
+                "mediawiki/phan-taint-check-plugin": "7.0.0",
+                "phan/phan": "5.5.1",
+                "php": ">=8.1.0"
+            },
+            "require-dev": {
+                "mediawiki/mediawiki-codesniffer": "47.0.0",
+                "mediawiki/minus-x": "1.1.3",
+                "ockcyp/covers-validator": "1.6.0",
+                "php-parallel-lint/php-console-highlighter": "1.0.0",
+                "php-parallel-lint/php-parallel-lint": "1.4.0",
+                "phpunit/phpunit": "9.6.21"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "MediaWikiPhanConfig\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "MediaWiki developers",
+                    "email": "wikitech-l@lists.wikimedia.org"
+                }
+            ],
+            "description": "Standard MediaWiki phan configuration",
+            "homepage": "https://www.mediawiki.org/wiki/Continuous_integration/Phan",
+            "support": {
+                "source": "https://github.com/wikimedia/mediawiki-tools-phan/tree/0.17.0"
+            },
+            "time": "2025-08-07T13:01:24+00:00"
+        },
+        {
+            "name": "mediawiki/phan-taint-check-plugin",
+            "version": "7.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/wikimedia/mediawiki-tools-phan-SecurityCheckPlugin.git",
+                "reference": "1d70b8bdbc0fcc048f204a86e07a8ac2fa324c55"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/wikimedia/mediawiki-tools-phan-SecurityCheckPlugin/zipball/1d70b8bdbc0fcc048f204a86e07a8ac2fa324c55",
+                "reference": "1d70b8bdbc0fcc048f204a86e07a8ac2fa324c55",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "phan/phan": "5.5.1",
+                "php": ">=8.1.0"
+            },
+            "require-dev": {
+                "ext-pdo": "*",
+                "mediawiki/mediawiki-codesniffer": "47.0.0",
+                "mediawiki/minus-x": "1.1.3",
+                "php-parallel-lint/php-console-highlighter": "1.0.0",
+                "php-parallel-lint/php-parallel-lint": "1.4.0",
+                "phpunit/phpunit": "9.6.21"
+            },
+            "suggest": {
+                "ext-mysqli": "Used for some mysqli function tests"
+            },
+            "bin": [
+                "scripts/seccheck"
+            ],
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "SecurityCheckPlugin\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Brian Wolff",
+                    "email": "bawolff+wn@gmail.com"
+                },
+                {
+                    "name": "Daimona Eaytoy",
+                    "email": "daimona.wiki@gmail.com"
+                }
+            ],
+            "description": "A Phan plugin to do security checking",
+            "keywords": [
+                "analyzer",
+                "phan",
+                "php",
+                "security",
+                "static",
+                "taint"
+            ],
+            "support": {
+                "irc": "irc://irc.libera.chat/wikimedia-dev",
+                "issues": "https://phabricator.wikimedia.org/maniphest/task/edit/form/1/?projects=securitycheckplugin",
+                "source": "https://phabricator.wikimedia.org/diffusion/MTPS/",
+                "wiki": "https://www.mediawiki.org/wiki/SecurityCheckPlugin"
+            },
+            "time": "2025-08-07T00:01:54+00:00"
+        },
         {
             "name": "mhujer/yaml-sort-checker",
             "version": "1.5.0",
@@ -445,6 +803,51 @@
             },
             "time": "2020-11-30T23:28:31+00:00"
         },
+        {
+            "name": "microsoft/tolerant-php-parser",
+            "version": "v0.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/microsoft/tolerant-php-parser.git",
+                "reference": "3eccfd273323aaf69513e2f1c888393f5947804b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/microsoft/tolerant-php-parser/zipball/3eccfd273323aaf69513e2f1c888393f5947804b",
+                "reference": "3eccfd273323aaf69513e2f1c888393f5947804b",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.5.15"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Microsoft\\PhpParser\\": [
+                        "src/"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Rob Lourens",
+                    "email": "roblou@microsoft.com"
+                }
+            ],
+            "description": "Tolerant PHP-to-AST parser designed for IDE usage scenarios",
+            "support": {
+                "issues": "https://github.com/microsoft/tolerant-php-parser/issues",
+                "source": "https://github.com/microsoft/tolerant-php-parser/tree/v0.1.2"
+            },
+            "time": "2022-10-05T17:30:19+00:00"
+        },
         {
             "name": "mustangostang/spyc",
             "version": "0.6.3",
@@ -559,6 +962,57 @@
             ],
             "time": "2025-08-01T08:46:24+00:00"
         },
+        {
+            "name": "netresearch/jsonmapper",
+            "version": "v4.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/cweiske/jsonmapper.git",
+                "reference": "8e76efb98ee8b6afc54687045e1b8dba55ac76e5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/cweiske/jsonmapper/zipball/8e76efb98ee8b6afc54687045e1b8dba55ac76e5",
+                "reference": "8e76efb98ee8b6afc54687045e1b8dba55ac76e5",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "ext-pcre": "*",
+                "ext-reflection": "*",
+                "ext-spl": "*",
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~7.5 || ~8.0 || ~9.0 || ~10.0",
+                "squizlabs/php_codesniffer": "~3.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "JsonMapper": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "OSL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Christian Weiske",
+                    "email": "cweiske@cweiske.de",
+                    "homepage": "http://github.com/cweiske/jsonmapper/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Map nested JSON structures onto PHP classes",
+            "support": {
+                "email": "cweiske@cweiske.de",
+                "issues": "https://github.com/cweiske/jsonmapper/issues",
+                "source": "https://github.com/cweiske/jsonmapper/tree/v4.5.0"
+            },
+            "time": "2024-09-08T10:13:13+00:00"
+        },
         {
             "name": "nikic/php-parser",
             "version": "v5.7.0",
@@ -617,6 +1071,86 @@
             },
             "time": "2025-12-06T11:56:16+00:00"
         },
+        {
+            "name": "phan/phan",
+            "version": "5.5.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phan/phan.git",
+                "reference": "2b6a846eff1a65dd0229ffa2370b4c35a96b7f3c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phan/phan/zipball/2b6a846eff1a65dd0229ffa2370b4c35a96b7f3c",
+                "reference": "2b6a846eff1a65dd0229ffa2370b4c35a96b7f3c",
+                "shasum": ""
+            },
+            "require": {
+                "composer/semver": "^1.4|^2.0|^3.0",
+                "composer/xdebug-handler": "^2.0|^3.0",
+                "ext-filter": "*",
+                "ext-json": "*",
+                "ext-tokenizer": "*",
+                "felixfbecker/advanced-json-rpc": "^3.0.4",
+                "microsoft/tolerant-php-parser": "0.1.2",
+                "netresearch/jsonmapper": "^1.6.0|^2.0|^3.0|^4.0|^5.0",
+                "php": "^7.2.0|^8.0.0",
+                "sabre/event": "^5.1.3",
+                "symfony/console": "^3.2|^4.0|^5.0|^6.0|^7.0",
+                "symfony/polyfill-mbstring": "^1.11.0",
+                "symfony/polyfill-php80": "^1.20.0",
+                "tysonandre/var_representation_polyfill": "^0.0.2|^0.1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.5.0"
+            },
+            "suggest": {
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+                },
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+                }
+            ],
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@@ -807,108 +1341,330 @@
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-                    "type": "open_collective"
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+            "time": "2025-06-14T07:40:39+00:00"
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+            "autoload": {
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+                        "src/"
+                    ]
                 }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
             ],
-            "time": "2025-08-10T01:04:45+00:00"
+            "description": "PHPDoc parser with support for nullable, intersection and generic types",
+            "support": {
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+                "source": "https://github.com/phpstan/phpdoc-parser/tree/2.3.0"
+            },
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@@ -1385,6 +2141,122 @@
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         },
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+                "log",
+                "psr",
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+            "homepage": "http://sabre.io/event/",
+            "keywords": [
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+                "async",
+                "coroutine",
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+                "source": "https://github.com/fruux/sabre-event"
+            },
+            "time": "2024-08-27T11:23:05+00:00"
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@@ -3445,6 +4317,126 @@
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+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Tyson Andre"
+                }
+            ],
+            "description": "Polyfill for var_representation: convert a variable to a string in a way that fixes the shortcomings of var_export",
+            "keywords": [
+                "var_export",
+                "var_representation"
+            ],
+            "support": {
+                "issues": "https://github.com/TysonAndre/var_representation_polyfill/issues",
+                "source": "https://github.com/TysonAndre/var_representation_polyfill/tree/0.1.3"
+            },
+            "time": "2022-08-31T12:59:22+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.12.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozarts/assert.git",
+                "reference": "9be6926d8b485f55b9229203f962b51ed377ba68"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/9be6926d8b485f55b9229203f962b51ed377ba68",
+                "reference": "9be6926d8b485f55b9229203f962b51ed377ba68",
+                "shasum": ""
+            },
+            "require": {
+                "ext-ctype": "*",
+                "ext-date": "*",
+                "ext-filter": "*",
+                "php": "^7.2 || ^8.0"
+            },
+            "suggest": {
+                "ext-intl": "",
+                "ext-simplexml": "",
+                "ext-spl": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.10-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "support": {
+                "issues": "https://github.com/webmozarts/assert/issues",
+                "source": "https://github.com/webmozarts/assert/tree/1.12.1"
+            },
+            "time": "2025-10-29T15:56:20+00:00"
         }
     ],
     "aliases": [],
diff --git a/src/LanguageUtil.php b/src/LanguageUtil.php
index 7468ba3..e62deba 100644
--- a/src/LanguageUtil.php
+++ b/src/LanguageUtil.php
@@ -7,6 +7,8 @@
 
 namespace Wikimedia\LanguageData;
 
+use stdClass;
+
 /**
  * A singleton utility class to query the language data.
  */
diff --git a/src/util/ulsdata2json.php b/src/util/ulsdata2json.php
index a259550..58c23dd 100644
--- a/src/util/ulsdata2json.php
+++ b/src/util/ulsdata2json.php
@@ -18,6 +18,8 @@
 
 print "Reading langdb.yaml...\n";
 $yamlLangdb = file_get_contents( DATA_DIRECTORY . '/langdb.yaml' );
+// spyc_load is from mustangostang/spyc. Only needed during development.
+// @phan-suppress-next-line PhanUndeclaredFunction
 $parsedLangdb = spyc_load( $yamlLangdb );
 
 $supplementalDataFilename = 'supplementalData.xml';