---
phase: 02-bot-core
plan: 01
subsystem: bot
tags: [telegram, python-telegram-bot, async, configuration]

# Dependency graph
requires:
  - phase: 01-foundation/01-03
    provides: Async database session management (init_db, create_tables, close_db)
provides:
  - Bot entry point with Application lifecycle
  - Configuration loading from environment
  - Handler registration pattern
affects: [02-02-handlers, 03-project-crud]

# Tech tracking
tech-stack:
  added: [python-telegram-bot]
  patterns: [ApplicationBuilder with lifecycle hooks, module-level config singleton]

key-files:
  created:
    - src/moai/bot/config.py
    - src/moai/bot/main.py
  modified:
    - src/moai/bot/handlers/__init__.py

key-decisions:
  - "Module-level config reference for post_init callback access"
  - "Config stored in bot_data for handler access"
  - "Empty register_handlers as extension point for future handlers"

patterns-established:
  - "Bot lifecycle: post_init for DB setup, post_shutdown for cleanup"
  - "Environment config with BotConfig.from_env() pattern"

issues-created: []

# Metrics
duration: 2min
completed: 2026-01-16
---

# Phase 02-01: Bot Infrastructure Summary

**Telegram bot entry point with ApplicationBuilder, config loading, and handler registration pattern**

## Performance

- **Duration:** 2 min
- **Started:** 2026-01-16T15:34:55Z
- **Completed:** 2026-01-16T15:37:27Z
- **Tasks:** 3
- **Files modified:** 3

## Accomplishments
- BotConfig dataclass loading configuration from environment variables
- Bot main.py with ApplicationBuilder and database lifecycle hooks
- Handler registration pattern ready for incremental handler addition

## Task Commits

Each task was committed atomically:

1. **Task 1: Create bot configuration module** - `4381e12` (feat)
2. **Task 2: Create bot main.py with Application setup** - `c3a849b` (feat)
3. **Task 3: Create handlers package structure** - `0a81855` (feat)

## Files Created/Modified
- `src/moai/bot/config.py` - BotConfig dataclass with from_env() loading BOT_TOKEN, ALLOWED_USERS, DATABASE_URL, LOG_LEVEL
- `src/moai/bot/main.py` - Bot entry point with ApplicationBuilder, post_init/post_shutdown hooks, register_handlers call
- `src/moai/bot/handlers/__init__.py` - register_handlers function placeholder for future handler registration

## Decisions Made
- Used module-level `_config` variable for post_init callback to access config (simpler than passing through Application)
- Store config in `app.bot_data["config"]` for handlers to access user settings
- Keep register_handlers as empty placeholder rather than removing it - cleaner extension point

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

## Next Phase Readiness
- Bot infrastructure complete, ready for handler implementation
- Ready for 02-02: /help and /status command handlers
- Database lifecycle integrated with bot startup/shutdown

---
*Phase: 02-bot-core*
*Completed: 2026-01-16*