Implement Python greeting utility with validation and tests

[Copilot]

Agent task demonstration implementing a greeting utility module with proper error handling and test coverage.

Implementation

• Core module (greeting.py): Two functions with input validation

  • greet(name) - single name greeting
  • greet_multiple(names) - batch greeting with list content validation

• Test coverage (test_greeting.py): 11 test cases covering normal operation, edge cases, and error conditions

• Error handling: Validates input types and content, raises ValueError for invalid strings and TypeError for wrong types

greet("World")  # Returns: "Hello, World! Welcome to the agent task implementation."

greet_multiple(["Alice", "Bob"])  # Returns list of greetings

greet("")  # Raises ValueError
greet_multiple(["Alice", None, "Bob"])  # Raises ValueError - validates all elements

Quality

• All tests pass
• CodeQL: No vulnerabilities
• Added .gitignore for Python artifacts

Original prompt

An agent task

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