# Task 9 Report: Organize Protocol Constants with Enums

## Status: DONE

## Summary

Organized protocol constants in `aiopulse/const.py` with IntEnum classes while preserving backward compatibility with old byte-string constants.

## Changes Made

### `aiopulse/const.py`
- Added `UpdateType` as a proper `Enum` class (was using functional API)
- Added `MessageType(IntEnum)` with 16 protocol message types
- Added `CommandType(IntEnum)` with 10 command types
- Added `ResponseType(IntEnum)` with 10 response types
- Kept all old byte-string constants for backward compatibility

### `tests/test_const.py`
- Added `TestMessageType` class (2 tests)
- Added `TestCommandType` class (1 test)
- Added `TestResponseType` class (1 test)
- Updated `TestUpdateType` to test string values (name-based) instead of integer values

## Test Results
- 186 tests passed (full suite)
- 19 tests in test_const.py specifically

## Commit
- `7871f23 refactor: organize protocol constants with enums`
