diff --git a/.vscode/settings.json b/.vscode/settings.json
index 4bf57ae..a37cb84 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -12,5 +12,6 @@
         "statusBar.debuggingForeground": "#F3FBFE",
         "statusBar.noFolderBackground": "#053241",
         "statusBar.noFolderForeground": "#F3FBFE"
-    }
+    },
+    "phpcs.standard": ".\\phpcs.xml",
 }
diff --git a/composer.json b/composer.json
index 3017a05..0c69478 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,8 @@
         }
     },
     "scripts": {
-        "test": "phpunit"
+        "test": "phpunit",
+        "lint": "phpcs --standard=phpcs.xml --report=full --report-file=phpcs-results.txt .",
+        "lint:fix": "phpcbf --standard=phpcs.xml ."
     }
 }
diff --git a/src/Domain/Task.php b/src/Domain/Task.php
index 96bf730..e154bda 100644
--- a/src/Domain/Task.php
+++ b/src/Domain/Task.php
@@ -1,5 +1,4 @@
 <?php
-
 /**
  * Task Domain Model
  *
@@ -31,30 +30,30 @@ class Task {
     /**
      * Constructor for Task
      *
-     * @param string $id        The task identifier
-     * @param string $title     The task title
-     * @param string $projectId The project identifier
-     * @param string $column    The column the task belongs to
-     * @param int    $order     The order of the task
-     * @param bool   $completed Whether the task is completed
-     * @param string $priority  The priority level of the task
-     * @param bool   $isActive  Whether the task is active
-     * @param string $body      The task description
-     * @param string $fileName  The task file name
-     * @param array  $meta      Additional metadata (optional)
+     * @param string $id        The task identifier.
+     * @param string $title     The task title.
+     * @param string $projectId The project identifier.
+     * @param string $column    The column the task belongs to.
+     * @param int    $order     The order of the task.
+     * @param bool   $completed Whether the task is completed.
+     * @param string $priority  The priority level of the task.
+     * @param bool   $isActive  Whether the task is active.
+     * @param string $body      The task description.
+     * @param string $fileName  The task file name.
+     * @param array  $meta      Additional metadata (optional).
      */
     public function __construct(
-    public string $id,
-    public string $title,
-    public string $projectId,
-    public string $column,
-    public int $order,
-    public bool $completed,
-    public string $priority,
-    public bool $isActive,
-    public string $body,
-    public string $fileName,
-    public array $meta = []
+        public string $id,
+        public string $title,
+        public string $projectId,
+        public string $column,
+        public int $order,
+        public bool $completed,
+        public string $priority,
+        public bool $isActive,
+        public string $body,
+        public string $fileName,
+        public array $meta = array()
     ) {
     }
 }
diff --git a/src/Markdown/FrontMatterDocument.php b/src/Markdown/FrontMatterDocument.php
index 79c83f5..638a69d 100644
--- a/src/Markdown/FrontMatterDocument.php
+++ b/src/Markdown/FrontMatterDocument.php
@@ -30,10 +30,9 @@ class FrontMatterDocument {
     /**
      * Constructor for FrontMatterDocument
      *
-     * @param array  $meta The front matter metadata
-     * @param string $body The document body content
+     * @param array  $meta The front matter metadata.
+     * @param string $body The document body content.
      */
     public function __construct( public array $meta, public string $body ) {
-
     }
 }
diff --git a/src/Markdown/FrontMatterParser.php b/src/Markdown/FrontMatterParser.php
index d9dd0fb..f6024c5 100644
--- a/src/Markdown/FrontMatterParser.php
+++ b/src/Markdown/FrontMatterParser.php
@@ -1,5 +1,4 @@
 <?php
-
 /**
  * Front Matter Parser
  *
@@ -14,7 +13,7 @@
  * @link     https://git.keithsolomon.net/keith/IronKanban
  */
 
-declare(strict_types=1);
+declare( strict_types=1 );
 
 namespace IronKanban\Markdown;
 
@@ -31,19 +30,17 @@ use Symfony\Component\Yaml\Yaml;
  * @license  Unlicense https://unlicense.org
  * @link     https://git.keithsolomon.net/keith/IronKanban
  */
-class FrontMatterParser
-{
+class FrontMatterParser {
     /**
      * Parse a markdown file and extract front matter
      *
-     * @param string $filePath Path to the markdown file
+     * @param string $filePath Path to the markdown file.
      *
-     * @return FrontMatterDocument The parsed document
+     * @return FrontMatterDocument The parsed document.
      *
-     * @throws RuntimeException If file cannot be read
+     * @throws RuntimeException If file cannot be read.
      */
-    public function parseFile(string $filePath): FrontMatterDocument
-    {
+    public function parseFile( string $filePath ): FrontMatterDocument {
         if (!is_file($filePath)) {
             throw new RuntimeException("Markdown file not found: {$filePath}");
         }
@@ -60,14 +57,13 @@ class FrontMatterParser
     /**
      * Parse a markdown string and extract front matter
      *
-     * @param string $contents The markdown content to parse
+     * @param string $contents The markdown content to parse.
      *
-     * @return FrontMatterDocument The parsed document
+     * @return FrontMatterDocument The parsed document.
      *
-     * @throws RuntimeException If YAML parsing fails
+     * @throws RuntimeException If YAML parsing fails.
      */
-    public function parseString(string $contents): FrontMatterDocument
-    {
+    public function parseString( string $contents ): FrontMatterDocument {
         $contents = str_replace(["\r\n", "\r"], "\n", $contents);
 
         if (!str_starts_with($contents, "---\n")) {
@@ -92,7 +88,7 @@ class FrontMatterParser
 
         try {
             $meta = Yaml::parse($yamlText);
-        } catch (ParseException $e) {
+        } catch ( ParseException $e ) {
             throw new RuntimeException(
                 'Failed to parse YAML front matter: ' . $e->getMessage(),
                 0,
@@ -110,12 +106,11 @@ class FrontMatterParser
     /**
      * Dump a document to markdown string with front matter
      *
-     * @param FrontMatterDocument $document The document to dump
+     * @param FrontMatterDocument $document The document to dump.
      *
-     * @return string The markdown content with front matter
+     * @return string The markdown content with front matter.
      */
-    public function dump(FrontMatterDocument $document): string
-    {
+    public function dump( FrontMatterDocument $document ): string {
         $yaml = Yaml::dump(
             $document->meta,
             4,
diff --git a/src/Repository/TaskRepository.php b/src/Repository/TaskRepository.php
index afeee1b..7915850 100644
--- a/src/Repository/TaskRepository.php
+++ b/src/Repository/TaskRepository.php
@@ -1,5 +1,4 @@
 <?php
-
 /**
  * Task Repository
  *
diff --git a/src/Support/FileLock.php b/src/Support/FileLock.php
index 0f2e951..ff62b1e 100644
--- a/src/Support/FileLock.php
+++ b/src/Support/FileLock.php
@@ -1,5 +1,4 @@
 <?php
-
 /**
  * File Lock
  *
diff --git a/src/Support/IdGenerator.php b/src/Support/IdGenerator.php
index 58766a9..019f570 100644
--- a/src/Support/IdGenerator.php
+++ b/src/Support/IdGenerator.php
@@ -1,5 +1,4 @@
 <?php
-
 /**
  * ID Generator
  *
diff --git a/src/Support/Paths.php b/src/Support/Paths.php
index 3ad1352..c3f9118 100644
--- a/src/Support/Paths.php
+++ b/src/Support/Paths.php
@@ -1,5 +1,4 @@
 <?php
-
 /**
  * Paths Helper
  *
diff --git a/src/Support/TaskMapper.php b/src/Support/TaskMapper.php
index e6b2565..fdcb5b7 100644
--- a/src/Support/TaskMapper.php
+++ b/src/Support/TaskMapper.php
@@ -1,5 +1,4 @@
 <?php
-
 /**
  * Task Mapper
  *
diff --git a/tests/FrontMatterParserTest.php b/tests/FrontMatterParserTest.php
new file mode 100644
index 0000000..de01c6d
--- /dev/null
+++ b/tests/FrontMatterParserTest.php
@@ -0,0 +1,74 @@
+<?php
+// phpcs:disable
+declare(strict_types=1);
+
+namespace IronKanban\Tests;
+
+use IronKanban\Markdown\FrontMatterDocument;
+use IronKanban\Markdown\FrontMatterParser;
+use PHPUnit\Framework\TestCase;
+
+class FrontMatterParserTest extends TestCase {
+    public function testParsesFrontMatterAndBody(): void {
+        $contents = <<<MD
+        ---
+        id: task-123
+        title: Test Task
+        completed: false
+        tags:
+        - alpha
+        - beta
+        ---
+
+        # Hello
+
+        This is the body.
+        MD;
+
+        $parser = new FrontMatterParser();
+        $document = $parser->parseString($contents);
+
+        $this->assertSame('task-123', $document->meta['id']);
+        $this->assertSame('Test Task', $document->meta['title']);
+        $this->assertFalse($document->meta['completed']);
+        $this->assertSame(['alpha', 'beta'], $document->meta['tags']);
+        $this->assertStringContainsString('# Hello', $document->body);
+    }
+
+    public function testReturnsEmptyMetaWhenNoFrontMatterExists(): void {
+        $contents = <<<MD
+        # Plain Markdown
+
+        No front matter here.
+        MD;
+
+        $parser = new FrontMatterParser();
+        $document = $parser->parseString($contents);
+
+        $this->assertSame([], $document->meta);
+        $this->assertStringContainsString('# Plain Markdown', $document->body);
+    }
+
+    public function testRoundTripsUnknownMetaKeys(): void {
+        $document = new FrontMatterDocument(
+            meta: [
+                'id' => 'task-456',
+                'type' => 'task',
+                'custom_key' => 'custom value',
+                'nested' => [
+                'one' => 'two',
+                ],
+            ],
+            body: "Test body\n\nMore text."
+        );
+
+        $parser = new FrontMatterParser();
+        $dumped = $parser->dump($document);
+        $parsed = $parser->parseString($dumped);
+
+        $this->assertSame('custom value', $parsed->meta['custom_key']);
+        $this->assertSame(['one' => 'two'], $parsed->meta['nested']);
+        $this->assertSame("Test body\n\nMore text.", $parsed->body);
+    }
+}
+// phpcs:enable
diff --git a/tests/TaskRepositoryTest.php b/tests/TaskRepositoryTest.php
new file mode 100644
index 0000000..c604b79
--- /dev/null
+++ b/tests/TaskRepositoryTest.php
@@ -0,0 +1,147 @@
+<?php
+// phpcs:disable
+declare(strict_types=1);
+
+namespace IronKanban\Tests;
+
+use IronKanban\Markdown\FrontMatterParser;
+use IronKanban\Repository\TaskRepository;
+use IronKanban\Support\IdGenerator;
+use IronKanban\Support\Paths;
+use IronKanban\Support\TaskMapper;
+use PHPUnit\Framework\TestCase;
+
+class TaskRepositoryTest extends TestCase {
+    private string $tempRoot;
+
+    protected function setUp(): void {
+        parent::setUp();
+
+        $this->tempRoot = sys_get_temp_dir() . '/ironkanban-test-' . bin2hex(random_bytes(4));
+        mkdir($this->tempRoot, 0775, true);
+        mkdir($this->tempRoot . '/sample-project', 0775, true);
+        mkdir($this->tempRoot . '/sample-project/tasks', 0775, true);
+    }
+
+    protected function tearDown(): void {
+        $this->deleteDirectory($this->tempRoot);
+        parent::tearDown();
+    }
+
+    public function testCreateWritesTaskFileAndCanReadItBack(): void {
+        $repo = $this->makeRepository();
+
+        $task = $repo->create([
+            'projectId' => 'sample-project',
+            'title' => 'Build parser',
+            'body' => "Task body",
+            'column' => 'doing',
+            'priority' => 'high',
+        ]);
+
+        $this->assertSame('Build parser', $task->title);
+        $this->assertSame('doing', $task->column);
+        $this->assertSame('high', $task->priority);
+        $this->assertFileExists($this->tempRoot . '/sample-project/tasks/' . $task->fileName);
+
+        $loaded = $repo->get('sample-project', $task->id);
+
+        $this->assertSame($task->id, $loaded->id);
+        $this->assertSame('Build parser', $loaded->title);
+        $this->assertSame('Task body', $loaded->body);
+        $this->assertSame($task->fileName, $loaded->fileName);
+    }
+
+    public function testPreservesLegacyFilenameWhenReadingAndSaving(): void {
+        $contents = <<<MD
+        ---
+        id: custom-task-id
+        type: task
+        title: Legacy Task
+        project_id: sample-project
+        section: Back Burner
+        priority: normal
+        completed: false
+        is_active: true
+        created: 2026-03-01T00:00:00+00:00
+        updated: 2026-03-01T00:00:00+00:00
+        legacy_key: keep-me
+        ---
+
+        Legacy body
+        MD;
+
+        $legacyPath = $this->tempRoot . '/sample-project/tasks/task-legacy-import.md';
+        file_put_contents($legacyPath, $contents);
+
+        $repo = $this->makeRepository();
+        $task = $repo->get('sample-project', 'custom-task-id');
+
+        $this->assertSame('task-legacy-import.md', $task->fileName);
+        $this->assertSame('back-burner', $task->column);
+        $this->assertSame('keep-me', $task->meta['legacy_key']);
+
+        $task->title = 'Legacy Task Updated';
+        $repo->save($task);
+
+        $this->assertFileExists($legacyPath);
+        $this->assertStringContainsString('Legacy Task Updated', (string) file_get_contents($legacyPath));
+        $this->assertStringContainsString('legacy_key: keep-me', (string) file_get_contents($legacyPath));
+    }
+
+    public function testDeleteRemovesUnderlyingFile(): void {
+        $repo = $this->makeRepository();
+
+        $task = $repo->create([
+            'projectId' => 'sample-project',
+            'title' => 'Delete me',
+        ]);
+
+        $filePath = $this->tempRoot . '/sample-project/tasks/' . $task->fileName;
+
+        $this->assertFileExists($filePath);
+
+        $repo->delete('sample-project', $task->id);
+
+        $this->assertFileDoesNotExist($filePath);
+    }
+
+    private function makeRepository(): TaskRepository {
+        return new TaskRepository(
+            new Paths($this->tempRoot),
+            new FrontMatterParser(),
+            new TaskMapper(),
+            new IdGenerator()
+        );
+    }
+
+    private function deleteDirectory(string $path): void {
+        if (!is_dir($path)) {
+            return;
+        }
+
+        $items = scandir($path);
+
+        if ($items === false) {
+            return;
+        }
+
+        foreach ($items as $item) {
+            if ($item === '.' || $item === '..') {
+                continue;
+            }
+
+            $itemPath = $path . DIRECTORY_SEPARATOR . $item;
+
+            if (is_dir($itemPath) && !is_link($itemPath)) {
+                $this->deleteDirectory($itemPath);
+                continue;
+            }
+
+            @unlink($itemPath);
+        }
+
+        @rmdir($path);
+    }
+}
+// phpcs:enable
diff --git a/vendor/bin/.phpunit.result.cache b/vendor/bin/.phpunit.result.cache
new file mode 100644
index 0000000..33b0f86
--- /dev/null
+++ b/vendor/bin/.phpunit.result.cache
@@ -0,0 +1 @@
+{"version":2,"defects":{"IronKanban\\Tests\\TaskRepositoryTest::testCreateWritesTaskFileAndCanReadItBack":7,"IronKanban\\Tests\\TaskRepositoryTest::testPreservesLegacyFilenameWhenReadingAndSaving":7,"IronKanban\\Tests\\TaskRepositoryTest::testDeleteRemovesUnderlyingFile":7},"times":{"IronKanban\\Tests\\FrontMatterParserTest::testParsesFrontMatterAndBody":0.702,"IronKanban\\Tests\\FrontMatterParserTest::testReturnsEmptyMetaWhenNoFrontMatterExists":0,"IronKanban\\Tests\\FrontMatterParserTest::testRoundTripsUnknownMetaKeys":0.081,"IronKanban\\Tests\\TaskRepositoryTest::testCreateWritesTaskFileAndCanReadItBack":0.879,"IronKanban\\Tests\\TaskRepositoryTest::testPreservesLegacyFilenameWhenReadingAndSaving":0.037,"IronKanban\\Tests\\TaskRepositoryTest::testDeleteRemovesUnderlyingFile":0.009}}
\ No newline at end of file