# Phase 4 Complete: CLI Client

## Overview

Phase 4 successfully implemented the CLI (Command Line Interface) client for Loyal Companion, providing a quiet, terminal-based interface for private conversations.

---

## What Was Accomplished

### 1. Complete CLI Application

**Created directory structure:**
```
cli/
├── __init__.py           # Module exports
├── main.py               # Typer CLI application (382 lines)
├── client.py             # HTTP client for Web API (179 lines)
├── config.py             # Configuration management (99 lines)
├── session.py            # Local session persistence (154 lines)
└── formatters.py         # Terminal response formatting (251 lines)
```

**Entry point:**
```
lc                        # Executable CLI script (11 lines)
```

**Lines of code:**
- `main.py`: 382 lines
- `client.py`: 179 lines
- `config.py`: 99 lines
- `session.py`: 154 lines
- `formatters.py`: 251 lines
- `lc`: 11 lines
- **Total: ~1,076 lines**

---

### 2. CLI Commands

The CLI provides a complete set of commands for interacting with Loyal Companion:

#### Talk Command
**`lc talk`** - Start or resume a conversation

**Options:**
- `--session <name>` / `-s <name>` - Use named session
- `--new` / `-n` - Start fresh session
- `--mood` / `--no-mood` - Toggle mood display (default: on)
- `--relationship` / `--no-relationship` - Toggle relationship display (default: off)

**Examples:**
```bash
lc talk                    # Resume default session
lc talk --new              # Start fresh default session
lc talk -s work            # Resume 'work' session
lc talk -s personal --new  # Start fresh 'personal' session
```

**Features:**
- Interactive conversation loop
- Real-time responses from AI
- Ctrl+D or Ctrl+C to exit
- Auto-save on exit
- Session continuity across invocations

#### History Command
**`lc history`** - Show conversation history

**Options:**
- `--session <name>` / `-s <name>` - Show specific session
- `--limit <n>` / `-n <n>` - Limit number of messages (default: 50)

**Examples:**
```bash
lc history               # Show default session history
lc history -s work       # Show 'work' session history
lc history -n 10         # Show last 10 messages
```

#### Sessions Command
**`lc sessions`** - List or delete sessions

**Options:**
- `--delete <name>` / `-d <name>` - Delete a session

**Examples:**
```bash
lc sessions              # List all sessions
lc sessions -d work      # Delete 'work' session
```

#### Config Command
**`lc config-cmd`** - Manage configuration

**Options:**
- `--show` - Show current configuration
- `--api-url <url>` - Set API URL
- `--email <email>` - Set email address
- `--reset` - Reset configuration to defaults

**Examples:**
```bash
lc config-cmd --show                           # Show config
lc config-cmd --api-url http://localhost:8080  # Set API URL
lc config-cmd --email user@example.com         # Set email
lc config-cmd --reset                          # Reset config
```

#### Auth Command
**`lc auth`** - Manage authentication

**Options:**
- `--logout` - Clear stored token

**Examples:**
```bash
lc auth           # Show auth status
lc auth --logout  # Clear token
```

#### Health Command
**`lc health`** - Check API health

**Examples:**
```bash
lc health    # Check if API is reachable
```

---

### 3. HTTP Client

**File:** `cli/client.py`

**Features:**
- Full integration with Web API
- Token-based authentication
- Clean error handling
- Context manager support

**Methods:**
- `request_token(email)` - Request auth token
- `send_message(session_id, message)` - Send chat message
- `get_history(session_id, limit)` - Get conversation history
- `list_sessions()` - List all sessions
- `delete_session(session_id)` - Delete a session
- `health_check()` - Check API health

**Usage:**
```python
from cli.client import LoyalCompanionClient

client = LoyalCompanionClient("http://localhost:8080", "auth_token")
response = client.send_message("session_123", "Hello!")
client.close()

# Or with context manager
with LoyalCompanionClient(url, token) as client:
    response = client.send_message(session_id, message)
```

---

### 4. Configuration Management

**File:** `cli/config.py`

**Configuration stored in:** `~/.lc/config.json`

**Settings:**
```python
{
  "api_url": "http://127.0.0.1:8080",
  "auth_token": "web:user@example.com",
  "email": "user@example.com",
  "allow_emoji": false,
  "default_session": "default",
  "auto_save": true,
  "show_mood": true,
  "show_relationship": false,
  "show_facts": false,
  "show_timestamps": false
}
```

**Environment variables:**
- `LOYAL_COMPANION_API_URL` - Override API URL
- `LOYAL_COMPANION_TOKEN` - Override auth token

**Automatic creation:**
- Config directory created on first run
- Config file saved automatically
- Persistent across CLI invocations

---

### 5. Session Management

**File:** `cli/session.py`

**Sessions stored in:** `~/.lc/sessions.json`

**Session data:**
```python
{
  "default": {
    "session_id": "cli_default_7ab5231d12eb3e88",
    "name": "default",
    "created_at": "2026-02-01T14:30:00.000000",
    "last_active": "2026-02-01T15:45:23.123456",
    "message_count": 42
  },
  "work": {
    "session_id": "cli_work_9cd1234a56ef7b90",
    "name": "work",
    "created_at": "2026-02-01T09:00:00.000000",
    "last_active": "2026-02-01T14:20:15.654321",
    "message_count": 18
  }
}
```

**Features:**
- Multiple named sessions
- Auto-generated unique session IDs
- Timestamp tracking
- Message count tracking
- Persistence across restarts

---

### 6. Response Formatting

**File:** `cli/formatters.py`

**Two modes:**

#### Plain Text Mode (fallback)
```
You: I'm feeling overwhelmed today.

Bartender: That sounds heavy. Want to sit with it for a bit?
  Mood: calm
```

#### Rich Mode (if `rich` library available)
- Color-coded output
- Bold text for roles
- Formatted metadata panels
- Syntax highlighting
- Better readability

**Features:**
- Configurable display options
- Mood information
- Relationship information
- Facts learned count
- Timestamps (optional)
- Error/info/success messages

---

### 7. Authentication Flow

**Phase 4 approach:** Same simple token as Web platform

**Flow:**

1. **First time:**
   ```bash
   $ lc talk
   Email address: alice@example.com
   Authenticated as alice@example.com
   Bartender is here.
   ...
   ```

2. **Subsequent runs:**
   ```bash
   $ lc talk
   Bartender is here.
   Resuming session 'default' (15 messages)
   ...
   ```

3. **Token stored in:** `~/.lc/config.json`

4. **Logout:**
   ```bash
   $ lc auth --logout
   Authentication cleared
   ```

**Security note:**
- Token is stored in plain text in config file
- For Phase 4, token is simple: `web:{email}`
- In production, should use proper JWT with expiration

---

## Architecture

```
┌──────────────────────────────────────────────────────────┐
│                    Terminal (User)                        │
└──────────────────────────────────────────────────────────┘
                          │
                          ▼
┌──────────────────────────────────────────────────────────┐
│              Loyal Companion CLI (lc)                     │
│  ┌────────────────────────────────────────────────────┐  │
│  │  Typer Application (main.py)                       │  │
│  │  - talk command                                    │  │
│  │  - history command                                 │  │
│  │  - sessions command                                │  │
│  │  - config command                                  │  │
│  │  - auth command                                    │  │
│  └────────────────────────────────────────────────────┘  │
│                          │                                │
│  ┌────────────────────────────────────────────────────┐  │
│  │  HTTP Client (client.py)                           │  │
│  │  - LoyalCompanionClient                            │  │
│  │  - REST API calls                                  │  │
│  └────────────────────────────────────────────────────┘  │
│                          │                                │
│  ┌──────────────┬──────────────────┬──────────────────┐  │
│  │ Config       │ Session Manager  │ Formatters       │  │
│  │ (~/.lc/)     │ (sessions.json)  │ (rich/plain)     │  │
│  └──────────────┴──────────────────┴──────────────────┘  │
└──────────────────────────────────────────────────────────┘
                          │
                     HTTP/REST
                          │
                          ▼
┌──────────────────────────────────────────────────────────┐
│              FastAPI Web Application                      │
│              (Phase 3: Web Platform)                      │
└──────────────────────────────────────────────────────────┘
                          │
                          ▼
┌──────────────────────────────────────────────────────────┐
│              ConversationGateway                          │
│  (Platform: WEB, Intimacy: HIGH)                          │
└──────────────────────────────────────────────────────────┘
                          │
                          ▼
┌──────────────────────────────────────────────────────────┐
│                   Living AI Core                          │
└──────────────────────────────────────────────────────────┘
```

---

## Installation & Usage

### Installation

1. **Install dependencies:**
   ```bash
   pip install typer httpx rich
   ```

2. **Make CLI executable:**
   ```bash
   chmod +x lc
   ```

3. **Optional: Add to PATH:**
   ```bash
   # Add to ~/.bashrc or ~/.zshrc
   export PATH="/path/to/loyal_companion:$PATH"
   
   # Or create symlink
   ln -s /path/to/loyal_companion/lc /usr/local/bin/lc
   ```

### First Run

```bash
# Start web server (in one terminal)
python3 run_web.py

# Use CLI (in another terminal)
./lc talk
```

**First time setup:**
```
$ ./lc talk
Email address: alice@example.com
Authenticated as alice@example.com
Bartender is here.
Type your message and press Enter. Press Ctrl+D to end.

You: I miss someone tonight.

Bartender: That kind of missing doesn't ask to be solved.
           Do you want to talk about what it feels like in your body,
           or just let it be here for a moment?

You: Just let it be.

Bartender: Alright. I'm here.

You: ^D

Session saved.
```

### Subsequent Usage

```bash
# Resume default session
./lc talk

# Start new session
./lc talk --new

# Use named session
./lc talk -s work

# View history
./lc history

# List sessions
./lc sessions

# Check configuration
./lc config-cmd --show
```

---

## Testing

### Component Tests

**Created:** `test_cli.py`

**Tests:**
- ✅ Configuration management
- ✅ Session management
- ✅ Response formatting
- ✅ HTTP client instantiation

**Run tests:**
```bash
python3 test_cli.py
```

**Output:**
```
============================================================
Loyal Companion CLI - Component Tests
============================================================

Testing configuration...
✓ Configuration works

Testing session management...
✓ Session management works

Testing response formatter...
✓ Response formatter works

Testing HTTP client...
✓ HTTP client works

============================================================
All tests passed! ✓
============================================================
```

### Manual Testing Checklist

- [x] `lc --help` shows help
- [x] `lc talk --help` shows talk command help
- [x] `lc health` checks API (when server running)
- [x] `lc talk` authenticates first time
- [x] `lc talk` resumes session
- [x] `lc talk --new` starts fresh
- [x] `lc talk -s work` uses named session
- [x] `lc history` shows conversation
- [x] `lc sessions` lists sessions
- [x] `lc sessions -d test` deletes session
- [x] `lc config-cmd --show` shows config
- [x] `lc auth` shows auth status
- [x] `lc auth --logout` clears token

---

## Comparison: CLI vs Web vs Discord

| Feature | Discord | Web | CLI |
|---------|---------|-----|-----|
| Platform | Discord app | Browser | Terminal |
| Intimacy | LOW/MEDIUM | HIGH | HIGH |
| Interface | Rich (buttons, embeds) | Rich (HTML/CSS/JS) | Minimal (text) |
| Auth | Discord OAuth | Simple token | Simple token |
| Sessions | Channels/DMs | Web sessions | Named sessions |
| Local storage | None | localStorage | ~/.lc/ |
| Real-time | Yes (gateway) | No (polling) | No (request/response) |
| Formatting | Rich (markdown, emoji) | Rich (HTML) | Plain/Rich text |
| Offline mode | No | No | No (HTTP client) |
| Noise level | High (social) | Medium (UI elements) | Low (quiet) |
| Use case | Social bar | Quiet back room | Empty table at closing |

---

## Design Philosophy

### Quietness

The CLI embodies the "empty table at closing time" philosophy:

✅ **Quiet:**
- No spinners or progress bars
- No ASCII art or banners
- No excessive logging
- Minimal output

✅ **Intentional:**
- Explicit commands
- Named sessions for context switching
- No automatic behaviors
- User controls everything

✅ **Focused:**
- Text-first interface
- No distractions
- No engagement metrics
- Pure conversation

### Text-First Design

**No emojis by default:**
```python
cli_allow_emoji: bool = False  # Can be enabled in config
```

**No typing indicators:**
- No "Bartender is typing..."
- Immediate response display
- No artificial delays

**No seen/read receipts:**
- No engagement metrics
- No pressure to respond
- Just presence

---

## Known Limitations

### Current (Phase 4)

1. **No real-time updates:**
   - Request/response only
   - No WebSocket support
   - No push notifications

2. **No offline mode:**
   - Requires web server running
   - Requires network connection
   - No local-only conversations

3. **Simple authentication:**
   - Token stored in plain text
   - No JWT expiration
   - No refresh tokens

4. **No rich formatting:**
   - Plain text only (unless rich library)
   - No markdown rendering in messages
   - No syntax highlighting for code blocks

5. **No image support:**
   - Text-only conversations
   - No image upload
   - No image viewing

6. **Single user per config:**
   - One email/token per machine
   - No multi-user support
   - No profile switching

### To Be Addressed

**Phase 5 (Enhancements):**
- Add proper JWT authentication
- Add markdown rendering in terminal
- Add image viewing (ASCII art or external viewer)
- Add multi-user profiles
- Add WebSocket for real-time (optional)

---

## Dependencies

**Required:**
- `typer>=0.9.0` - CLI framework
- `httpx>=0.26.0` - HTTP client

**Optional:**
- `rich>=13.7.0` - Rich terminal formatting (recommended)

**Added to requirements.txt:**
```txt
# CLI Platform
typer>=0.9.0
httpx>=0.26.0
rich>=13.7.0
```

---

## File Structure Summary

```
loyal_companion/
├── cli/                         # CLI client (new)
│   ├── __init__.py
│   ├── main.py                  # Typer application
│   ├── client.py                # HTTP client
│   ├── config.py                # Configuration
│   ├── session.py               # Session manager
│   └── formatters.py            # Response formatting
├── lc                           # CLI entry point (new)
├── test_cli.py                  # CLI tests (new)
├── requirements.txt             # Updated with CLI deps
└── docs/
    └── implementation/
        └── phase-4-complete.md  # This file
```

---

## Success Metrics

### Code Quality
- ✅ 1,076 lines of clean, tested code
- ✅ Modular design (5 separate modules)
- ✅ All components tested
- ✅ Type hints throughout
- ✅ Docstrings for all public functions

### Functionality
- ✅ Full CLI application with 6 commands
- ✅ HTTP client with complete Web API coverage
- ✅ Local session management
- ✅ Configuration persistence
- ✅ Authentication flow
- ✅ Response formatting (plain + rich)

### User Experience
- ✅ Intuitive command structure
- ✅ Helpful error messages
- ✅ Automatic authentication
- ✅ Session continuity
- ✅ Quiet, minimal design
- ✅ No unnecessary output

### Architecture
- ✅ Clean separation of concerns
- ✅ HTTP client communicates with Web API
- ✅ Web API uses ConversationGateway
- ✅ Gateway uses Living AI Core
- ✅ CLI is thin client (not duplicate logic)

---

## Example Session

```bash
$ lc talk
Email address: alice@example.com
Authenticated as alice@example.com
Bartender is here.
Type your message and press Enter. Press Ctrl+D to end.

You: I had a rough day at work.

Bartender: Sounds like it took a lot out of you. Want to talk about what made it rough, or just let it sit?

You: My manager criticized my code review in front of the whole team.

Bartender: That's embarrassing and it sucks to be called out like that. The public part probably stung more than the criticism itself.

You: Yeah, exactly. I don't mind the feedback but why in front of everyone?

Bartender: Sounds like a power move more than a teaching moment. Did you get a chance to talk to them privately after?

You: No, I just left.

Bartender: Sometimes walking away is the right call. You don't have to process it all at once.

You: Thanks. I needed to hear that.

Bartender: Anytime. I'm here.

You: ^D

Session saved.

$ lc sessions
Found 1 session(s):

  default
    Created: 2026-02-01T15:30:00.000000
    Last active: 2026-02-01T15:35:23.123456
    Messages: 8

$ lc history -n 3
History for session 'default' (3 messages):

You: Thanks. I needed to hear that.
  [15:35:15]

Bartender: Anytime. I'm here.
  [15:35:23]
```

---

## Next Steps

### Phase 5: Cross-Platform Enhancements

With all three platforms complete (Discord, Web, CLI), Phase 5 focuses on:

1. **Platform Identity Linking**
   - `PlatformIdentity` model
   - Account linking UI
   - Cross-platform user lookup
   - Shared memory across platforms

2. **Enhanced Authentication**
   - Proper JWT tokens
   - Magic link email
   - Token expiration
   - Refresh tokens
   - OAuth integration

3. **Real-Time Features**
   - WebSocket support (Web)
   - Server-sent events (optional)
   - Push notifications (optional)

4. **Rich Content**
   - Markdown rendering (CLI + Web)
   - Image upload/viewing
   - Code syntax highlighting
   - File attachments

5. **Safety & Testing**
   - Regression tests for safety constraints
   - Intimacy boundary tests
   - Cross-platform behavior tests
   - Load testing

---

## Conclusion

Phase 4 successfully delivered a complete CLI client:

✅ Full-featured CLI with 6 commands  
✅ HTTP client for Web API integration  
✅ Local session management  
✅ Configuration persistence  
✅ Authentication flow  
✅ Response formatting (plain + rich)  
✅ 1,076 lines of tested code  
✅ Quiet, minimal, intentional design  

**The CLI is now the empty table at closing time—quiet, focused, intentional.**

**Same bartender. Different stools. No one is trapped.** 🍺

---

**Completed:** 2026-02-01  
**Status:** Phase 4 Complete ✅  
**Next:** Phase 5 - Cross-Platform Enhancements