diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index aaee198..bddbadb 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -35,3 +35,8 @@ jobs:
 
       - name: Lint Frontend
         run: npx biome check
+
+      - name: Lint TS errors
+        run: |
+          php artisan wayfinder:generate
+          npx vue-tsc --noEmit --checkJs --project tsconfig.json
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 038f158..f0d01f3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,38 +13,47 @@ on:
 jobs:
   ci:
     runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:15
+        env:
+          POSTGRES_USER: test
+          POSTGRES_PASSWORD: secret
+          POSTGRES_DB: test_db
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
-      - name: Setup PHP
-        uses: shivammathur/setup-php@v2
+      - uses: shivammathur/setup-php@v2
         with:
           php-version: 8.4
           tools: composer:v2
           coverage: xdebug
 
-      - name: Setup Node
-        uses: actions/setup-node@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: '22'
           cache: 'npm'
 
-      - name: Install Node Dependencies
-        run: npm ci
-
-      - name: Install Dependencies
-        run: composer install --no-interaction --prefer-dist --optimize-autoloader
-
-      - name: Copy Environment File
-        run: cp .env.example .env
-
-      - name: Generate Application Key
-        run: php artisan key:generate
-
-      - name: Build Assets
-        run: npm run build
+      - run: npm ci
+      - run: composer install --no-interaction --prefer-dist --optimize-autoloader
+      - run: cp .env.example .env
+      - run: php artisan key:generate
+      - run: npm run build
 
       - name: Tests
+        env:
+          DB_CONNECTION: pgsql
+          DB_HOST: 127.0.0.1
+          DB_PORT: 5432
+          DB_DATABASE: test_db
+          DB_USERNAME: test
+          DB_PASSWORD: secret
         run: ./vendor/bin/pest
diff --git a/app/Console/Commands/LoadProLang.php b/app/Console/Commands/LoadProLang.php
index 1a3ae26..10602ca 100644
--- a/app/Console/Commands/LoadProLang.php
+++ b/app/Console/Commands/LoadProLang.php
@@ -51,9 +51,9 @@ private function saveProLang(array $item) {
                     'name' => $yearGroup['name'],
                 ),
                 array(
-                    'apiId' => $yearGroup['id'],
-                    'position' => $yearGroup['position'],
-                    'name' => $yearGroup['name'],
+                    'apiId' => $yearGroup['id'] ?? null,
+                    'position' => $yearGroup['position'] ?? null,
+                    'name' => $yearGroup['name'] ?? null,
                 ));
 
             $updatedLang = ProLang::updateOrCreate(
@@ -118,12 +118,92 @@ private function getLanguages(int $page) {
     }
 
     /**
-     * Execute the console command.
+     * Add some languages like Phel missing in prolang api
      */
+    private function addProLanguage() {
+        $langToAdd = array(
+            // Data : https://phel-lang.org/ and preums itselft
+            array(
+                'authors' => array(),
+                'company' => null,
+                'id' => uniqid().'_Phel',
+                'link' => '',
+                'name' => 'Phel',
+                'predecessors' => array(),
+                'yearGroup' => array(
+                    'name' => '2020s',
+                ),
+                'years' => array(2020),
+            ),
+            // Data : https://janet-lang.org/ and preums itselft
+            array(
+                'authors' => array(),
+                'company' => null,
+                'id' => uniqid().'_Janet',
+                'link' => '',
+                'name' => 'Janet',
+                'predecessors' => array(),
+                'yearGroup' => array(
+                    'name' => '2010s',
+                ),
+                'years' => array(2017),
+            ),
+        );
+
+        foreach ($langToAdd as $item) {
+            $this->saveProLang($item);
+            Log::info('action=add_missing_lang, status=succes, lang='.$item['name']);
+        }
+    }
+
+    /**
+     * Add links between languages
+     *  - Some data are missing from prolang api
+     *  - Ex : Php is Hack's predecessors
+     */
+    private function updateLangFamily() {
+        $langFamilies = array(
+            // Data: https://github.com/janet-lang/janet
+            'Janet' => array('C'),
+            // Data : https://phel-lang.org/
+            'Phel' => array('PHP', 'Clojure', 'Janet', 'Lisp'),
+            // https://en.wikipedia.org/wiki/PHP
+            'PHP' => array('C', 'C++', 'Perl'),
+            // Data : https://en.wikipedia.org/wiki/Hack_(programming_language)
+            'Hack' => array('PHP', 'OCaml', 'Java', 'Scala', 'Haskell', 'C#'),
+            // Data : https://crystal-lang.org/ and https://en.wikipedia.org/wiki/Crystal_(programming_language)
+            'Crystal' => array('Ruby', 'Go'),
+            // Data : https://en.wikipedia.org/wiki/Ruby_(programming_language)
+            'Ruby' => array('Ada', 'Eiffel', 'Lua', 'Dylan'),
+            // Data : https://en.wikipedia.org/wiki/Dylan_(programming_language)
+            'Dylan' => array('ALGOL 60', 'EuLisp'),
+            // Data : https://en.wikipedia.org/wiki/Lasso_(programming_language)
+            'Lasso' => array('Dylan', 'Scala'),
+        );
+
+        foreach ($langFamilies as $name => $value) {
+            $lang = ProLang::where('name', $name)->first();
+            if ($lang) {
+                $parents = ProLang::whereIn(
+                    'name', $value
+                )->pluck('id');
+
+                $lang->parents()->sync($parents);
+                $lang->save();
+
+                Log::info("action=save_lang, status=success, lang=$name");
+            } else {
+                Log::info("action=save_lang, status=failed, reason=lang $name not found");
+            }
+        }
+    }
+
     public function handle() {
         Log::info('action=load_prolang_command, status=started');
 
         $this->getLanguages(1);
+        $this->addProLanguage();
+        $this->updateLangFamily();
 
         Log::info('action=load_prolang_command, status=finished');
     }
diff --git a/app/Console/Commands/ProLangAssets.php b/app/Console/Commands/ProLangAssets.php
index 5cd41c7..d6894e1 100644
--- a/app/Console/Commands/ProLangAssets.php
+++ b/app/Console/Commands/ProLangAssets.php
@@ -1117,6 +1117,12 @@ function member
             ),
             'Common Lisp' => array(),
             'Windows PowerShell' => array(),
+            'Phel' => array(
+                'mainRepository' => 'https://github.com/phel-lang/phel-lang',
+            ),
+            'Janet' => array(
+                'mainRepository' => 'https://github.com/janet-lang/janet',
+            ),
         );
 
         DB::transaction(function () use ($langsData) {
@@ -1141,9 +1147,10 @@ function member
      */
     public function handle() {
         Log::info('action=prolang_assets_command, status=started');
-        $this->updateAssets();
-        Log::info('action=prolang_assets_command, status=finished');
 
+        $this->updateAssets();
         $this->updateLinks();
+
+        Log::info('action=prolang_assets_command, status=finished');
     }
 }
diff --git a/app/Models/ProLang.php b/app/Models/ProLang.php
index c575573..fead52a 100644
--- a/app/Models/ProLang.php
+++ b/app/Models/ProLang.php
@@ -5,6 +5,7 @@
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Support\Facades\DB;
 
 /**
  * @property int $id
@@ -21,6 +22,8 @@
 class ProLang extends Model {
     protected $guarded = array('id');
 
+    protected $appends = array('paths');
+
     protected $casts = array(
         'years' => 'array',
     );
@@ -52,4 +55,38 @@ public function authors(): BelongsToMany {
     public function authorNames(): array {
         return $this->authors()->pluck('name')->toArray();
     }
+
+    // paths
+
+    public function getPathsAttribute() {
+        $targetId = DB::table('pro_langs')->where('id', $this->id)->value('id');
+
+        $paths = DB::select("
+            WITH RECURSIVE paths AS (
+                SELECT
+                    l.id,
+                    l.name,
+                    l.name::text AS path
+                FROM pro_langs l
+                WHERE NOT EXISTS (
+                    SELECT 1 FROM predecessors p WHERE p.child_id = l.id
+                )
+
+                UNION ALL
+
+                SELECT
+                    c.id,
+                    c.name,
+                    paths.path || ' -> ' || c.name
+                FROM paths
+                JOIN predecessors p ON p.parent_id = paths.id
+                JOIN pro_langs c ON c.id = p.child_id
+            )
+            SELECT path
+            FROM paths
+            WHERE id = ?
+        ", array($targetId));
+
+        return array_map(fn ($r) => $r->path, $paths);
+    }
 }
diff --git a/package-lock.json b/package-lock.json
index faf7b7f..0e20858 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,6 @@
                 "@hackernoon/pixel-icon-library": "^1.0.6",
                 "@inertiajs/vue3": "^2.2.19",
                 "@nanostores/vue": "^1.0.1",
-                "@tailwindcss/vite": "^4.1.11",
                 "@vueuse/core": "^12.8.2",
                 "@yeger/vue-masonry-wall": "^5.1.4",
                 "chart.js": "^4.5.1",
@@ -43,19 +42,6 @@
                 "lightningcss-linux-x64-gnu": "^1.29.1"
             }
         },
-        "node_modules/@ampproject/remapping": {
-            "version": "2.3.0",
-            "resolved": "https://registry.npmjs.org/@ampproject/remapping/-/remapping-2.3.0.tgz",
-            "integrity": "sha512-30iZtAPgz+LTIYoeivqYo853f02jBYSd5uGnGpkFV0M3xOt9aN73erkgYAmZU43x4VfqcnLxW9Kpg3R5LC4YYw==",
-            "license": "Apache-2.0",
-            "dependencies": {
-                "@jridgewell/gen-mapping": "^0.3.5",
-                "@jridgewell/trace-mapping": "^0.3.24"
-            },
-            "engines": {
-                "node": ">=6.0.0"
-            }
-        },
         "node_modules/@awesome.me/webawesome": {
             "version": "3.0.0",
             "resolved": "https://registry.npmjs.org/@awesome.me/webawesome/-/webawesome-3.0.0.tgz",
@@ -734,53 +720,12 @@
                 "vue": "^3.0.0"
             }
         },
-        "node_modules/@isaacs/fs-minipass": {
-            "version": "4.0.1",
-            "resolved": "https://registry.npmjs.org/@isaacs/fs-minipass/-/fs-minipass-4.0.1.tgz",
-            "integrity": "sha512-wgm9Ehl2jpeqP3zw/7mo3kRHFp5MEDhqAdwy1fTGkHAwnkGOVsgpvQhL8B5n1qlb01jV3n/bI0ZfZp5lWA1k4w==",
-            "license": "ISC",
-            "dependencies": {
-                "minipass": "^7.0.4"
-            },
-            "engines": {
-                "node": ">=18.0.0"
-            }
-        },
-        "node_modules/@jridgewell/gen-mapping": {
-            "version": "0.3.12",
-            "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.12.tgz",
-            "integrity": "sha512-OuLGC46TjB5BbN1dH8JULVVZY4WTdkF7tV9Ys6wLL1rubZnCMstOhNHueU5bLCrnRuDhKPDM4g6sw4Bel5Gzqg==",
-            "license": "MIT",
-            "dependencies": {
-                "@jridgewell/sourcemap-codec": "^1.5.0",
-                "@jridgewell/trace-mapping": "^0.3.24"
-            }
-        },
-        "node_modules/@jridgewell/resolve-uri": {
-            "version": "3.1.2",
-            "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
-            "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
-            "license": "MIT",
-            "engines": {
-                "node": ">=6.0.0"
-            }
-        },
         "node_modules/@jridgewell/sourcemap-codec": {
             "version": "1.5.4",
             "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.4.tgz",
             "integrity": "sha512-VT2+G1VQs/9oz078bLrYbecdZKs912zQlkelYpuf+SXF+QvZDYJlbx/LSx+meSAwdDFnF8FVXW92AVjjkVmgFw==",
             "license": "MIT"
         },
-        "node_modules/@jridgewell/trace-mapping": {
-            "version": "0.3.29",
-            "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.29.tgz",
-            "integrity": "sha512-uw6guiW/gcAGPDhLmd77/6lW8QLeiV5RUTsAX46Db6oLhGaVj4lhnPwb184s1bkc8kdVg/+h988dro8GRDpmYQ==",
-            "license": "MIT",
-            "dependencies": {
-                "@jridgewell/resolve-uri": "^3.1.0",
-                "@jridgewell/sourcemap-codec": "^1.4.14"
-            }
-        },
         "node_modules/@kurkle/color": {
             "version": "0.3.4",
             "resolved": "https://registry.npmjs.org/@kurkle/color/-/color-0.3.4.tgz",
@@ -1527,79 +1472,6 @@
             "integrity": "sha512-r4C9C/5kSfMBIr0D9imvpRdCNXtUNgyYThc4YlS6K5Hchv1UyxNQ9mxwj+BTRH2i1Neits260sR3OjKMnplsFA==",
             "license": "MIT"
         },
-        "node_modules/@tailwindcss/node": {
-            "version": "4.1.11",
-            "resolved": "https://registry.npmjs.org/@tailwindcss/node/-/node-4.1.11.tgz",
-            "integrity": "sha512-yzhzuGRmv5QyU9qLNg4GTlYI6STedBWRE7NjxP45CsFYYq9taI0zJXZBMqIC/c8fViNLhmrbpSFS57EoxUmD6Q==",
-            "license": "MIT",
-            "dependencies": {
-                "@ampproject/remapping": "^2.3.0",
-                "enhanced-resolve": "^5.18.1",
-                "jiti": "^2.4.2",
-                "lightningcss": "1.30.1",
-                "magic-string": "^0.30.17",
-                "source-map-js": "^1.2.1",
-                "tailwindcss": "4.1.11"
-            }
-        },
-        "node_modules/@tailwindcss/oxide": {
-            "version": "4.1.11",
-            "resolved": "https://registry.npmjs.org/@tailwindcss/oxide/-/oxide-4.1.11.tgz",
-            "integrity": "sha512-Q69XzrtAhuyfHo+5/HMgr1lAiPP/G40OMFAnws7xcFEYqcypZmdW8eGXaOUIeOl1dzPJBPENXgbjsOyhg2nkrg==",
-            "hasInstallScript": true,
-            "license": "MIT",
-            "dependencies": {
-                "detect-libc": "^2.0.4",
-                "tar": "^7.4.3"
-            },
-            "engines": {
-                "node": ">= 10"
-            },
-            "optionalDependencies": {
-                "@tailwindcss/oxide-android-arm64": "4.1.11",
-                "@tailwindcss/oxide-darwin-arm64": "4.1.11",
-                "@tailwindcss/oxide-darwin-x64": "4.1.11",
-                "@tailwindcss/oxide-freebsd-x64": "4.1.11",
-                "@tailwindcss/oxide-linux-arm-gnueabihf": "4.1.11",
-                "@tailwindcss/oxide-linux-arm64-gnu": "4.1.11",
-                "@tailwindcss/oxide-linux-arm64-musl": "4.1.11",
-                "@tailwindcss/oxide-linux-x64-gnu": "4.1.11",
-                "@tailwindcss/oxide-linux-x64-musl": "4.1.11",
-                "@tailwindcss/oxide-wasm32-wasi": "4.1.11",
-                "@tailwindcss/oxide-win32-arm64-msvc": "4.1.11",
-                "@tailwindcss/oxide-win32-x64-msvc": "4.1.11"
-            }
-        },
-        "node_modules/@tailwindcss/oxide-darwin-arm64": {
-            "version": "4.1.11",
-            "resolved": "https://registry.npmjs.org/@tailwindcss/oxide-darwin-arm64/-/oxide-darwin-arm64-4.1.11.tgz",
-            "integrity": "sha512-ESgStEOEsyg8J5YcMb1xl8WFOXfeBmrhAwGsFxxB2CxY9evy63+AtpbDLAyRkJnxLy2WsD1qF13E97uQyP1lfQ==",
-            "cpu": [
-                "arm64"
-            ],
-            "license": "MIT",
-            "optional": true,
-            "os": [
-                "darwin"
-            ],
-            "engines": {
-                "node": ">= 10"
-            }
-        },
-        "node_modules/@tailwindcss/vite": {
-            "version": "4.1.11",
-            "resolved": "https://registry.npmjs.org/@tailwindcss/vite/-/vite-4.1.11.tgz",
-            "integrity": "sha512-RHYhrR3hku0MJFRV+fN2gNbDNEh3dwKvY8XJvTxCSXeMOsCRSr+uKvDWQcbizrHgjML6ZmTE5OwMrl5wKcujCw==",
-            "license": "MIT",
-            "dependencies": {
-                "@tailwindcss/node": "4.1.11",
-                "@tailwindcss/oxide": "4.1.11",
-                "tailwindcss": "4.1.11"
-            },
-            "peerDependencies": {
-                "vite": "^5.2.0 || ^6 || ^7"
-            }
-        },
         "node_modules/@types/conventional-commits-parser": {
             "version": "5.0.2",
             "resolved": "https://registry.npmjs.org/@types/conventional-commits-parser/-/conventional-commits-parser-5.0.2.tgz",
@@ -2177,15 +2049,6 @@
                 "url": "https://paulmillr.com/funding/"
             }
         },
-        "node_modules/chownr": {
-            "version": "3.0.0",
-            "resolved": "https://registry.npmjs.org/chownr/-/chownr-3.0.0.tgz",
-            "integrity": "sha512-+IxzY9BZOQd/XuYPRmrvEVjF/nqj5kgT4kEq7VofrDoM1MxoRjEWkrCC3EtLi59TVawxTAn+orJwFQcrqEN1+g==",
-            "license": "BlueOak-1.0.0",
-            "engines": {
-                "node": ">=18"
-            }
-        },
         "node_modules/class-variance-authority": {
             "version": "0.7.1",
             "resolved": "https://registry.npmjs.org/class-variance-authority/-/class-variance-authority-0.7.1.tgz",
@@ -2530,6 +2393,8 @@
             "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.0.4.tgz",
             "integrity": "sha512-3UDv+G9CsCKO1WKMGw9fwq/SWJYbI0c5Y7LU1AXYoDdbhE2AHQ6N6Nb34sG8Fj7T5APy8qXDCKuuIHd1BR0tVA==",
             "license": "Apache-2.0",
+            "optional": true,
+            "peer": true,
             "engines": {
                 "node": ">=8"
             }
@@ -2581,19 +2446,6 @@
             "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
             "license": "MIT"
         },
-        "node_modules/enhanced-resolve": {
-            "version": "5.18.2",
-            "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.18.2.tgz",
-            "integrity": "sha512-6Jw4sE1maoRJo3q8MsSIn2onJFbLTOjY9hlx4DZXmOKvLRd1Ok2kXmAGXaafL2+ijsJZ1ClYbl/pmqr9+k4iUQ==",
-            "license": "MIT",
-            "dependencies": {
-                "graceful-fs": "^4.2.4",
-                "tapable": "^2.2.0"
-            },
-            "engines": {
-                "node": ">=10.13.0"
-            }
-        },
         "node_modules/entities": {
             "version": "4.5.0",
             "resolved": "https://registry.npmjs.org/entities/-/entities-4.5.0.tgz",
@@ -2916,12 +2768,6 @@
                 "url": "https://github.com/sponsors/ljharb"
             }
         },
-        "node_modules/graceful-fs": {
-            "version": "4.2.11",
-            "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.11.tgz",
-            "integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==",
-            "license": "ISC"
-        },
         "node_modules/has-flag": {
             "version": "4.0.0",
             "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
@@ -3153,6 +2999,7 @@
             "version": "2.6.1",
             "resolved": "https://registry.npmjs.org/jiti/-/jiti-2.6.1.tgz",
             "integrity": "sha512-ekilCSN1jwRvIbgeg/57YFh8qQDNbwDb9xT/qu2DAHbFFZUicIl4ygVaAvzveMhMVr3LnpSKTNnwt8PoOfmKhQ==",
+            "devOptional": true,
             "license": "MIT",
             "bin": {
                 "jiti": "lib/jiti-cli.mjs"
@@ -3244,6 +3091,8 @@
             "resolved": "https://registry.npmjs.org/lightningcss/-/lightningcss-1.30.1.tgz",
             "integrity": "sha512-xi6IyHML+c9+Q3W0S4fCQJOym42pyurFiJUHEcEyHS0CeKzia4yZDEsLlqOFykxOdHpNy0NmvVO31vcSqAxJCg==",
             "license": "MPL-2.0",
+            "optional": true,
+            "peer": true,
             "dependencies": {
                 "detect-libc": "^2.0.3"
             },
@@ -3279,6 +3128,7 @@
             "os": [
                 "darwin"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3299,6 +3149,7 @@
             "os": [
                 "darwin"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3319,6 +3170,7 @@
             "os": [
                 "freebsd"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3339,6 +3191,7 @@
             "os": [
                 "linux"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3359,6 +3212,7 @@
             "os": [
                 "linux"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3379,6 +3233,7 @@
             "os": [
                 "linux"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3419,6 +3274,7 @@
             "os": [
                 "linux"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3439,6 +3295,7 @@
             "os": [
                 "win32"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3459,6 +3316,7 @@
             "os": [
                 "win32"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3479,6 +3337,7 @@
             "os": [
                 "linux"
             ],
+            "peer": true,
             "engines": {
                 "node": ">= 12.0.0"
             },
@@ -3821,48 +3680,12 @@
                 "url": "https://github.com/sponsors/ljharb"
             }
         },
-        "node_modules/minipass": {
-            "version": "7.1.2",
-            "resolved": "https://registry.npmjs.org/minipass/-/minipass-7.1.2.tgz",
-            "integrity": "sha512-qOOzS1cBTWYF4BH8fVePDBOO9iptMnGUEZwNc/cMWnTV2nVLZ7VoNWEPHkYczZA0pdoA7dl6e7FL659nX9S2aw==",
-            "license": "ISC",
-            "engines": {
-                "node": ">=16 || 14 >=14.17"
-            }
-        },
-        "node_modules/minizlib": {
-            "version": "3.0.2",
-            "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-3.0.2.tgz",
-            "integrity": "sha512-oG62iEk+CYt5Xj2YqI5Xi9xWUeZhDI8jjQmC5oThVH5JGCTgIjr7ciJDzC7MBzYd//WvR1OTmP5Q38Q8ShQtVA==",
-            "license": "MIT",
-            "dependencies": {
-                "minipass": "^7.1.2"
-            },
-            "engines": {
-                "node": ">= 18"
-            }
-        },
         "node_modules/mitt": {
             "version": "3.0.1",
             "resolved": "https://registry.npmjs.org/mitt/-/mitt-3.0.1.tgz",
             "integrity": "sha512-vKivATfr97l2/QBCYAkXYDbrIWPM2IIKEl7YPhjCvKlG3kE2gm+uBo6nEXK3M5/Ffh/FLpKExzOQ3JJoJGFKBw==",
             "license": "MIT"
         },
-        "node_modules/mkdirp": {
-            "version": "3.0.1",
-            "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-3.0.1.tgz",
-            "integrity": "sha512-+NsyUUAZDmo6YVHzL/stxSu3t9YS1iljliy3BSDrXJ/dkn1KYdmtZODGGjLcc9XLgVVpH4KshHB8XmZgMhaBXg==",
-            "license": "MIT",
-            "bin": {
-                "mkdirp": "dist/cjs/src/bin.js"
-            },
-            "engines": {
-                "node": ">=10"
-            },
-            "funding": {
-                "url": "https://github.com/sponsors/isaacs"
-            }
-        },
         "node_modules/muggle-string": {
             "version": "0.4.1",
             "resolved": "https://registry.npmjs.org/muggle-string/-/muggle-string-0.4.1.tgz",
@@ -4875,38 +4698,6 @@
                 "node": ">=16.0.0"
             }
         },
-        "node_modules/tailwindcss": {
-            "version": "4.1.11",
-            "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.1.11.tgz",
-            "integrity": "sha512-2E9TBm6MDD/xKYe+dvJZAmg3yxIEDNRc0jwlNyDg/4Fil2QcSLjFKGVff0lAf1jjeaArlG/M75Ey/EYr/OJtBA==",
-            "license": "MIT"
-        },
-        "node_modules/tapable": {
-            "version": "2.2.2",
-            "resolved": "https://registry.npmjs.org/tapable/-/tapable-2.2.2.tgz",
-            "integrity": "sha512-Re10+NauLTMCudc7T5WLFLAwDhQ0JWdrMK+9B2M8zR5hRExKmsRDCBA7/aV/pNJFltmBFO5BAMlQFi/vq3nKOg==",
-            "license": "MIT",
-            "engines": {
-                "node": ">=6"
-            }
-        },
-        "node_modules/tar": {
-            "version": "7.4.3",
-            "resolved": "https://registry.npmjs.org/tar/-/tar-7.4.3.tgz",
-            "integrity": "sha512-5S7Va8hKfV7W5U6g3aYxXmlPoZVAwUMy9AOKyF2fVuZa2UD3qZjg578OrLRt8PcNN1PleVaL/5/yYATNL0ICUw==",
-            "license": "ISC",
-            "dependencies": {
-                "@isaacs/fs-minipass": "^4.0.0",
-                "chownr": "^3.0.0",
-                "minipass": "^7.1.2",
-                "minizlib": "^3.0.1",
-                "mkdirp": "^3.0.1",
-                "yallist": "^5.0.0"
-            },
-            "engines": {
-                "node": ">=18"
-            }
-        },
         "node_modules/text-extensions": {
             "version": "2.4.0",
             "resolved": "https://registry.npmjs.org/text-extensions/-/text-extensions-2.4.0.tgz",
@@ -5377,15 +5168,6 @@
                 "node": ">=10"
             }
         },
-        "node_modules/yallist": {
-            "version": "5.0.0",
-            "resolved": "https://registry.npmjs.org/yallist/-/yallist-5.0.0.tgz",
-            "integrity": "sha512-YgvUTfwqyc7UXVMrB+SImsVYSmTS8X/tSrtdNZMImM+n7+QTriRXyXim0mBrTXNeqzVF0KWGgHPeiyViFFrNDw==",
-            "license": "BlueOak-1.0.0",
-            "engines": {
-                "node": ">=18"
-            }
-        },
         "node_modules/yargs": {
             "version": "17.7.2",
             "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
diff --git a/package.json b/package.json
index 0ef0851..bf2edaf 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,6 @@
         "@hackernoon/pixel-icon-library": "^1.0.6",
         "@inertiajs/vue3": "^2.2.19",
         "@nanostores/vue": "^1.0.1",
-        "@tailwindcss/vite": "^4.1.11",
         "@vueuse/core": "^12.8.2",
         "@yeger/vue-masonry-wall": "^5.1.4",
         "chart.js": "^4.5.1",
diff --git a/resources/js/components/prolang/LangCard.vue b/resources/js/components/prolang/LangCard.vue
index 41b66c9..89de930 100644
--- a/resources/js/components/prolang/LangCard.vue
+++ b/resources/js/components/prolang/LangCard.vue
@@ -1,7 +1,7 @@
 <template>
     <wa-drawer
         :open="props.selectedLang === props.lang.name"
-        @wa-hide="emits('select-lang', null)"
+        @wa-hide="emits('close', '')"
         :label="props.lang.name"
         style="--size: 50vw"
     >
@@ -89,8 +89,13 @@
         </div>
 
         <!--  -->
-        <wa-button slot="footer" variant="brand" @click="drawerOpen = false"
-            >Close</wa-button
+        <wa-button
+            slot="footer"
+            variant="brand"
+            @click="emits('close')"
+        >
+            Close
+        </wa-button
         >
     </wa-drawer>
     <wa-card class="card-overview">
@@ -145,7 +150,7 @@ import { computed, ref } from "vue"
 import type { ProLangLanguage } from "@/types/main"
 
 const code = ref<string | null>(null)
-const emits = defineEmits(["select-lang"])
+const emits = defineEmits(["select-lang", "close"])
 
 const props = defineProps<{
     lang: ProLangLanguage
diff --git a/resources/js/components/repository/RepositoryDetails.vue b/resources/js/components/repository/RepositoryDetails.vue
index 7446e42..a48449a 100644
--- a/resources/js/components/repository/RepositoryDetails.vue
+++ b/resources/js/components/repository/RepositoryDetails.vue
@@ -11,9 +11,9 @@
 </template>
 
 <script lang="ts" setup>
-import type { GithubSearchResultItem } from "@/types/main"
+import type { GithubRepository } from "@/types/main"
 
 const props = defineProps<{
-    repository: GithubSearchResultItem
+    repository: GithubRepository
 }>()
 </script>
diff --git a/resources/js/lib/utils.ts b/resources/js/lib/utils.ts
deleted file mode 100644
index 03aaa4b..0000000
--- a/resources/js/lib/utils.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import { type ClassValue, clsx } from "clsx"
-import { twMerge } from "tailwind-merge"
-
-export function cn(...inputs: ClassValue[]) {
-    return twMerge(clsx(inputs))
-}
diff --git a/resources/js/pages/LangHistory.vue b/resources/js/pages/LangHistory.vue
index 981fb6a..7506cf3 100644
--- a/resources/js/pages/LangHistory.vue
+++ b/resources/js/pages/LangHistory.vue
@@ -56,7 +56,8 @@
                         <LangCard
                             :lang="item"
                             :key="item.apiId"
-                            @select-lang="updateSelectedLang($event)"
+                            @select-lang="updateSelectedLang($event, false)"
+                            @close="updateSelectedLang($event, true)"
                             :selectedLang="selectedLang"
                         />
                     </template>
@@ -84,12 +85,17 @@ const props = defineProps<{
     groups: YearGroup[]
 }>()
 
-function updateSelectedLang(value: string) {
-    if (searchLang.value.length > 0) {
+function updateSelectedLang(value: string, forClose: boolean) {
+    if (forClose) {
+        selectedLang.value = ""
+    } else {
+        // if (searchLang.value.length > 0) {
+        //     searchLang.value = value
+        // }
+
         searchLang.value = value
+        selectedLang.value = value
     }
-
-    selectedLang.value = value
 }
 
 const showGroups = computed(() => {
diff --git a/resources/js/pages/RepositoryHistory.vue b/resources/js/pages/RepositoryHistory.vue
index 9481afd..818f6aa 100644
--- a/resources/js/pages/RepositoryHistory.vue
+++ b/resources/js/pages/RepositoryHistory.vue
@@ -67,10 +67,10 @@ import RepositoryDetails from "@/components/repository/RepositoryDetails.vue"
 import RepositoryLanguages from "@/components/repository/RepositoryLanguages.vue"
 import RepositoryRelease from "@/components/repository/RepositoryRelease.vue"
 import RepositoryTopics from "@/components/repository/RepositoryTopics.vue"
-import type { GithubCommit, GithubCommitActivity, GithubCommitDiff, GithubRelease, GithubSearchResultItem } from "@/types/main"
+import type { GithubCommit, GithubCommitActivity, GithubCommitDiff, GithubRelease, GithubRepository } from "@/types/main"
 
 const props = defineProps<{
-    repository: GithubSearchResultItem
+    repository: GithubRepository
     commits: {
         firstCommit: GithubCommit | null
         lastCommit: GithubCommit
diff --git a/resources/js/types/main.d.ts b/resources/js/types/main.d.ts
index 71e7ef0..60558e5 100644
--- a/resources/js/types/main.d.ts
+++ b/resources/js/types/main.d.ts
@@ -112,7 +112,6 @@ export type ProLangAuthor = {
 }
 
 export type ProLangLanguage = {
-    // TODO: add predecessors in hisotry
     id: number
     apiId: string
     company: string | null
@@ -125,8 +124,9 @@ export type ProLangLanguage = {
     codeTitle: string
     rawCode: string | null
     rawCodeLink: string | null
-    children: ProLangLanguage[]
-    parents: ProLangLanguage[]
+    children: Array<Omit<ProLangLanguage, "childran" | "parent">>
+    parents: Array<Omit<ProLangLanguage, "childran" | "parent">>
+    paths: string[]
 }
 
 export type YearGroup = {
diff --git a/tests/Datasets/ProLang.php b/tests/Datasets/ProLang.php
index 2164999..37f3eca 100644
--- a/tests/Datasets/ProLang.php
+++ b/tests/Datasets/ProLang.php
@@ -1,5 +1,8 @@
 <?php
 
+use App\Console\Commands\LoadProLang;
+use Illuminate\Support\Facades\Http;
+
 function getProLangSample(string $filename) {
     return json_decode(
         file_get_contents(PROJECT_ROOT.'/tests/samples/'.$filename),
@@ -7,7 +10,18 @@ function getProLangSample(string $filename) {
     );
 }
 
-$proLang = getGithubSample('prolang-api.json');
+function mockProlangApi(array $prolang) {
+    Http::fake(array(
+        'https://api.prolanghistory.com/languages*' => Http::response(
+            $prolang,
+            200,
+        ),
+    ));
+
+    (new LoadProLang())->handle();
+}
+
+$proLang = getProLangSample('prolang-api.json');
 
 dataset('prolang', array(
     array($proLang))
diff --git a/tests/Unit/Commands/FroozeRepositoriesTest.php b/tests/Unit/Commands/FroozeRepositoriesTest.php
index 44db81b..03e1393 100644
--- a/tests/Unit/Commands/FroozeRepositoriesTest.php
+++ b/tests/Unit/Commands/FroozeRepositoriesTest.php
@@ -15,6 +15,12 @@
                 200,
             ),
         ));
+        Http::fake(array(
+            'https://api.github.com/repos/*' => Http::response(
+                $repos[0],
+                200,
+            ),
+        ));
 
         FrozenRepository::insert(array(
             'created_at' => Carbon::now(),
diff --git a/tests/Unit/Commands/LoadProLangTest.php b/tests/Unit/Commands/LoadProLangTest.php
index 79a237c..0d94a17 100644
--- a/tests/Unit/Commands/LoadProLangTest.php
+++ b/tests/Unit/Commands/LoadProLangTest.php
@@ -1,23 +1,11 @@
 <?php
 
-use App\Console\Commands\LoadProLang;
 use App\Models\ProLang;
 use App\Models\YearGroup;
 use Illuminate\Http\Client\Request;
 use Illuminate\Support\Facades\Http;
 
 describe('LoadProLang command', function () {
-    function mockProlangApi(array $prolang) {
-        Http::fake(array(
-            'https://api.prolanghistory.com/languages*' => Http::response(
-                $prolang,
-                200,
-            ),
-        ));
-
-        (new LoadProLang())->handle();
-    }
-
     it('should call prolang api', function (array $prolang) {
         mockProlangApi($prolang);
 
@@ -63,7 +51,7 @@ function mockProlangApi(array $prolang) {
 
         expect(
             ProLang::all()->count()
-        )->toBe(29);
+        )->toBe(30);
         expect(
             ProLang::where('name', 'Icon')->count()
         )->toBe(1);
diff --git a/tests/Unit/Models/ProLangTest.php b/tests/Unit/Models/ProLangTest.php
new file mode 100644
index 0000000..433f39c
--- /dev/null
+++ b/tests/Unit/Models/ProLangTest.php
@@ -0,0 +1,84 @@
+<?php
+
+use App\Models\ProLang;
+use App\Models\YearGroup;
+
+it('should be able to get all family paths', function () {
+    $group = YearGroup::create(array(
+        'apiId' => '',
+        'name' => '1990',
+        'position' => 1,
+    ));
+
+    $parents = array_map(function (string $name) use ($group) {
+        $l = ProLang::create(array(
+            'name' => $name,
+            'apiId' => '',
+            'link' => '',
+            'company' => null,
+            'years' => '["1990"]',
+            'yearGroupId' => $group->id,
+        ));
+
+        return $l;
+    }, array('LiveScript', 'Perl'));
+
+    $lang = ProLang::create(array(
+        'name' => 'JvaScript',
+        'apiId' => '',
+        'link' => '',
+        'company' => null,
+        'years' => '["1990"]',
+        'yearGroupId' => $group->id,
+    ));
+
+    $anotherLang = ProLang::create(array(
+        'name' => 'Awesome',
+        'apiId' => '',
+        'link' => '',
+        'company' => null,
+        'years' => '["1990"]',
+        'yearGroupId' => $group->id,
+    ));
+
+    $lang->parents()->sync($parents);
+    $anotherLang->children()->sync(array(
+        $parents[0],
+    ));
+
+    expect(count($lang->paths))->toBe(2);
+    expect($lang->paths)->toContain('Perl -> JvaScript');
+    expect($lang->paths)->toContain('Awesome -> LiveScript -> JvaScript');
+});
+
+it('should be able to detect if it is an orphan lang', function () {
+    $group = YearGroup::create(array(
+        'apiId' => '',
+        'name' => '1990',
+        'position' => 1,
+    ));
+
+    $lang = ProLang::create(array(
+        'name' => 'JvaScript',
+        'apiId' => '',
+        'link' => '',
+        'company' => null,
+        'years' => '["1990"]',
+        'yearGroupId' => $group->id,
+    ));
+
+    $anotherLang = ProLang::create(array(
+        'name' => 'Awesome',
+        'apiId' => '',
+        'link' => '',
+        'company' => null,
+        'years' => '["1990"]',
+        'yearGroupId' => $group->id,
+    ));
+
+    expect($lang->isOrphan())->toBe(true);
+
+    $lang->parents()->sync($anotherLang);
+
+    expect($lang->isOrphan())->toBe(false);
+});