feat(tia): continues to work on poc

src/Plugins/Tia/WatchDefaults/WatchDefault.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Plugins\Tia\WatchDefaults;
+
+/**
+ * A set of file-watch patterns that apply when a particular framework,
+ * library or project layout is detected.
+ *
+ * Each implementation probes for the presence of the tool it covers
+ * (`applicable`) and returns glob → test-directory mappings (`defaults`)
+ * that are merged into `WatchPatterns`.
+ *
+ * @internal
+ */
+interface WatchDefault
+{
+    /**
+     * Whether this default set applies to the current project.
+     */
+    public function applicable(): bool;
+
+    /**
+     * @return array<string, array<int, string>>  glob → list of project-relative test dirs
+     */
+    public function defaults(string $projectRoot, string $testPath): array;
+}