Hello World Example

.trae/specs/hello/checklist.md

@@ -0,0 +1,4 @@
+# Checklist
+- [x] Hello function exists and is accessible
+- [x] Hello function returns a friendly greeting message
+- [x] Error handling is implemented for edge cases

.trae/specs/hello/spec.md

@@ -0,0 +1,20 @@
+# Hello Feature Spec
+
+## Why
+Provide a simple greeting mechanism to demonstrate basic functionality and establish a foundation for user interaction features.
+
+## What Changes
+- Add a hello greeting endpoint/function
+- Implement basic response handling
+
+## Impact
+- Affected specs: User interaction, greeting system
+- Affected code: New greeting module
+
+## ADDED Requirements
+### Requirement: Hello Greeting
+The system SHALL provide a hello greeting function that returns a friendly greeting message.
+
+#### Scenario: Success case
+- **WHEN** user requests a hello greeting
+- **THEN** system returns a friendly greeting message

.trae/specs/hello/tasks.md

@@ -0,0 +1,8 @@
+# Tasks
+- [x] Task 1: Create hello greeting function
+  - [x] SubTask 1.1: Create hello module/file
+  - [x] SubTask 1.2: Implement hello function that returns greeting message
+  - [x] SubTask 1.3: Add basic error handling
+
+# Task Dependencies
+- No dependencies between tasks

pycchess/hello.py

@@ -0,0 +1,26 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+def hello(name=None):
+    """
+    Returns a friendly greeting message.
+
+    Args:
+        name: Optional name to personalize the greeting
+
+    Returns:
+        A greeting string
+
+    Raises:
+        ValueError: If name is empty string
+    """
+    if name is None:
+        return "Hello! Welcome to pycchess."
+
+    if not isinstance(name, str):
+        raise ValueError("Name must be a string")
+
+    if name.strip() == "":
+        raise ValueError("Name cannot be empty")
+
+    return "Hello, {}! Welcome to pycchess.".format(name.strip())