feat(cli): Enhance test discovery with support for single file and glob pattern execution using improved CLI argument detection

readme.plan.md

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+# Plan for adding single file and glob pattern execution support to tstest
+
+!! FIRST: Reread /home/philkunz/.claude/CLAUDE.md to ensure following all guidelines !!
+
+## Goal - ✅ COMPLETED
+- ✅ Make `tstest test/test.abc.ts` run the specified file directly
+- ✅ Support glob patterns like `tstest test/*.spec.ts` or `tstest test/**/*.test.ts`
+- ✅ Maintain backward compatibility with directory argument
+
+## Current behavior - UPDATED
+- ✅ tstest now supports three modes: directory, single file, and glob patterns
+- ✅ Directory mode now searches recursively using `**/test*.ts` pattern
+- ✅ Single file mode runs a specific test file
+- ✅ Glob mode runs files matching the pattern
+
+## Completed changes
+
+### 1. ✅ Update cli argument handling in index.ts
+- ✅ Detect argument type: file path, glob pattern, or directory
+- ✅ Check if argument contains glob characters (*, **, ?, [], etc.)
+- ✅ Pass appropriate mode to TsTest constructor
+- ✅ Added TestExecutionMode enum
+
+### 2. ✅ Modify TsTest constructor and class
+- ✅ Add support for three modes: directory, file, glob
+- ✅ Update constructor to accept pattern/path and mode
+- ✅ Added executionMode property to track the mode
+
+### 3. ✅ Update TestDirectory class
+- ✅ Used `listFileTree` for glob pattern support
+- ✅ Used `SmartFile.fromFilePath` for single file loading
+- ✅ Refactored to support all three modes in `_init` method
+- ✅ Return appropriate file array based on mode
+- ✅ Changed default directory behavior to recursive search
+  - ✅ When directory argument: use `**/test*.ts` pattern for recursive search
+  - ✅ This ensures subdirectories are included in test discovery
+
+### 4. ✅ Test the implementation
+- ✅ Created test file `test/test.single.ts` for single file functionality
+- ✅ Created test file `test/test.glob.ts` for glob pattern functionality
+- ✅ Created test in subdirectory `test/subdir/test.sub.ts` for recursive search
+- ✅ Tested with existing test files for backward compatibility
+- ✅ Tested glob patterns: `test/test.*.ts` works correctly
+- ✅ Verified that default behavior now includes subdirectories
+
+## Implementation completed
+1. ✅ CLI argument type detection implemented
+2. ✅ TsTest class supports all three modes
+3. ✅ TestDirectory handles files, globs, and directories
+4. ✅ Default pattern changed from `test*.ts` to `**/test*.ts` for recursive search
+5. ✅ Comprehensive tests added and all modes verified