# Task 01: Project Setup & Dependencies

**Status:** 🟢 Complete
**Created:** 2025-01-08
**Completed:** 2025-01-08

---

## Objective

Set up the project infrastructure and dependencies required for YouTube MCP server implementation.

---

## Acceptance Criteria

- [x] Add YouTube dependencies to pyproject.toml
  - [x] `google-api-python-client>=2.0.0`
  - [x] `youtube-transcript-api>=0.6.0`
- [x] Update config.py with YOUTUBE_API_KEY
- [x] Create `app/tools/youtube/` module structure
- [x] Run `uv sync` to install dependencies
- [x] Verify linting passes

---

## Implementation

### 1. Added YouTube Dependencies

Used `uv add` to install latest versions:

```bash
uv add google-api-python-client youtube-transcript-api
```

**Installed packages:**
- `google-api-python-client==2.187.0` - YouTube Data API v3 client
- `youtube-transcript-api==1.2.3` - Transcript extraction
- Plus 12 transitive dependencies (google-auth, httplib2, etc.)

### 2. Updated Configuration

Modified `app/config.py`:

```python
# YouTube API configuration
youtube_api_key: str | None = Field(
    default=None,
    description="YouTube Data API v3 key for accessing YouTube services.",
)

@property
def youtube_enabled(self) -> bool:
    """Check if YouTube API key is configured."""
    return bool(self.youtube_api_key)
```

**Benefits:**
- Environment variable `YOUTUBE_API_KEY` auto-loaded via pydantic-settings
- `settings.youtube_enabled` property for conditional feature activation
- Type-safe configuration with validation

### 3. Created YouTube Tools Module

Created directory structure:

```
app/tools/youtube/
└── __init__.py
```

**Next steps:**
- `models.py` - Pydantic models (Task 02)
- `client.py` - YouTube API client (Task 02)
- `search.py` - Search tools (Task 03)
- `metadata.py` - Metadata tools (Task 04)
- `transcripts.py` - Transcript tools (Task 05)
- `comments.py` - Comment tools (Task 06)

### 4. Environment Configuration

`.env.example` already configured with:
- Required: `YOUTUBE_API_KEY`
- Optional: Langfuse tracing keys
- Optional: Cache size overrides
- Clear setup instructions

---

## Verification

```bash
# Dependencies installed
uv sync
# ✅ Resolved 132 packages in 2ms

# Linting passed
ruff check app/config.py app/tools/youtube/
# ✅ All checks passed!

# Module structure verified
tree app/tools/youtube
# ✅ youtube/__init__.py created
```

---

## Issues Encountered

### Issue 1: Virtual Environment Mismatch

**Problem:** Shell had old `fastmcp-template/.venv` active

**Solution:** User deactivated old venv and fixed environment

**Lesson:** Always check `$VIRTUAL_ENV` matches current project

---

## Files Modified

- `pyproject.toml` - Added 2 dependencies
- `uv.lock` - Updated with 14 packages
- `app/config.py` - Added YouTube API key configuration
- `app/tools/youtube/__init__.py` - Created (new file)

---

## Next Task

**Task 02: Core YouTube Client**
- Create Pydantic models for YouTube data structures
- Implement YouTube API client factory
- Add error handling for quota/auth issues
- Write unit tests for client initialization
