# Beast Mailbox Core

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Redis-backed mailbox utilities extracted from Beast Mode. **Enterprise-grade with 90% coverage, 52% documentation density, and ZERO defects!**

## Features
- Durable messaging via Redis streams (`XADD`/`XREADGROUP`)
- Consumer groups per agent ID
- Async handler registration for inbound messages
- Simple CLI entry points (`beast-mailbox-service`, `beast-mailbox-send`)
- One-shot message inspection with optional acknowledge/trim operations

## Installation

```bash
pip install beast-mailbox-core
```

## Quickstart

### Redis Configuration

**Priority order:**
1. CLI flags (highest priority - explicit override)
2. `REDIS_URL` environment variable (convenient default)
3. Hardcoded defaults (localhost:6379)

**Using REDIS_URL (recommended for OpenFlow Playground):**
```bash
export REDIS_URL="redis://:password@host:port/db"
beast-mailbox-service my-agent --echo  # Just works!
```

**Using Individual Environment Variables (Programmatic Usage):**
```bash
export REDIS_HOST="prod-redis.example.com"
export REDIS_PORT="6379"
export REDIS_PASSWORD="secret"
export REDIS_DB="0"
```

**Python API automatically reads environment variables:**
```python
from beast_mailbox_core import RedisMailboxService

# Automatically reads from REDIS_HOST, REDIS_PORT, REDIS_PASSWORD, REDIS_DB
# Falls back to REDIS_URL if REDIS_HOST not set
# Only defaults to localhost:6379 if no env vars are set
service = RedisMailboxService("my-agent", config=None)  # Reads from env!
```

**Using CLI flags:**
```bash
beast-mailbox-service my-agent \
  --redis-host 192.168.1.119 \
  --redis-password beastmode2025 \
  --redis-port 6379 \
  --redis-db 0
```

CLI flags override environment variables when both are provided.

### Start a streaming listener

```bash
# With REDIS_URL set (easiest)
export REDIS_URL="redis://:beastmode2025@192.168.1.119:6379/0"
beast-mailbox-service herbert --echo

# Or with CLI flags
beast-mailbox-service herbert \
  --redis-host 192.168.1.119 --redis-password beastmode2025 --echo
```

### Send messages

```bash
# With REDIS_URL set
export REDIS_URL="redis://:beastmode2025@192.168.1.119:6379/0"
beast-mailbox-send devbox herbert --message "ping"

# Or with CLI flags
beast-mailbox-send devbox herbert --message "ping" \
  --redis-host 192.168.1.119 --redis-password beastmode2025

# Send structured JSON payload
beast-mailbox-send devbox herbert --json '{"task": "sync", "priority": "high"}' \
  --message-type task_update
```

## One-Shot Message Inspection

### Read-only inspection (default)

```bash
# View the latest message without consuming it
beast-mailbox-service devbox --latest --count 1 \
  --redis-host vonnegut --redis-password beastmode2025

# View the 5 most recent messages
beast-mailbox-service devbox --latest --count 5 \
  --redis-host vonnegut --redis-password beastmode2025 --verbose
```

### Acknowledge messages (semi-destructive)

⚠️ **Warning:** Marks messages as acknowledged in the consumer group, preventing redelivery.

```bash
# View and acknowledge the latest 5 messages
beast-mailbox-service devbox --latest --count 5 --ack \
  --redis-host vonnegut --redis-password beastmode2025
```

Output:
```
📬 devbox <- alice (direct_message) [1234567890-0]: {'text': 'Hello'}
✓ Acknowledged 5 message(s) in group devbox:group
```

### Trim messages (destructive)

⚠️ **Warning:** Permanently deletes messages from the stream. **Cannot be undone.**

```bash
# View and delete the latest 5 messages
beast-mailbox-service devbox --latest --count 5 --trim \
  --redis-host vonnegut --redis-password beastmode2025
```

Output:
```
📬 devbox <- alice (direct_message) [1234567890-0]: {'text': 'Hello'}
🗑️  Deleted 5 message(s) from stream
```

### Combined acknowledge and trim (common cleanup pattern)

```bash
# View, acknowledge, and delete messages in one operation
beast-mailbox-service devbox --latest --count 10 --ack --trim \
  --redis-host vonnegut --redis-password beastmode2025 --verbose
```

## CLI Options Reference

### `beast-mailbox-service <agent_id> [options]`

**Positional Arguments:**
- `agent_id` - Unique identifier for this mailbox (e.g., `devbox`, `poe`, `herbert`)

**Connection Options:**
- `--redis-host HOST` - Redis server host (default: `localhost`)
- `--redis-port PORT` - Redis server port (default: `6379`)
- `--redis-password PASSWORD` - Redis authentication password
- `--redis-db DB` - Redis database index (default: `0`)

**Operation Modes:**
- `--latest` - One-shot mode: fetch latest messages and exit (default: streaming mode)
- `--count N` - Number of messages to fetch in one-shot mode (default: `1`)

**Destructive Operations (require `--latest`):**
- `--ack` - Acknowledge messages after displaying them
- `--trim` - Delete messages after displaying them (implies acknowledgement)

**Other Options:**
- `--poll-interval SECONDS` - Seconds between stream polls in streaming mode (default: `2.0`)
- `--verbose` - Enable debug logging
- `--echo` - (deprecated, use `--verbose`)

### `beast-mailbox-send <sender> <recipient> [options]`

**Positional Arguments:**
- `sender` - Agent ID sending the message
- `recipient` - Agent ID receiving the message

**Message Options:**
- `--message TEXT` - Plain text message
- `--json JSON` - JSON payload
- `--message-type TYPE` - Message type classification (default: `direct_message`)

**Connection Options:** (same as `beast-mailbox-service`)

## Best Practices

### Safety Guidelines

1. **Always start with read-only inspection:**
   ```bash
   beast-mailbox-service myagent --latest --count 5
   ```

2. **Use `--count` to limit destructive operations:**
   Don't accidentally delete hundreds of messages - specify a reasonable count.

3. **Enable `--verbose` for audit trails:**
   See exactly what was acknowledged/deleted with timestamps and message IDs.

4. **`--ack` is safer than `--trim`:**
   Acknowledgement prevents redelivery but keeps messages in the stream for debugging.

5. **Back up before trimming in production:**
   Use `redis-cli DUMP beast:mailbox:<agent>:in` to export the stream first.

6. **Check exit codes in automation:**
   - Exit code `0` = success
   - Non-zero = failure (check stderr for details)

### Error Handling

- Partial failures (e.g., network interruption) are reported clearly
- Acknowledgement failures prevent trimming to avoid data loss
- Consumer group creation errors are handled gracefully (BUSYGROUP)

## Environment Notes

This package disables the heavy observability hooks by default. You still need a Redis
instance accessible to all nodes. If you run alongside the full Beast Mode
stack, simply point to the same Redis host.

Set `BEAST_MODE_PROMETHEUS_ENABLED=false` to explicitly disable metrics collection.

## Troubleshooting

**Messages not appearing:**
- Verify Redis connection with `redis-cli -h <host> -a <password> ping`
- Check the stream exists: `redis-cli -h <host> XLEN beast:mailbox:<agent>:in`
- Ensure agent IDs match (sender → recipient)

**Consumer group errors:**
- "BUSYGROUP" errors are normal and handled automatically
- Group names are `<agent_id>:group` format

**REDIS_URL parsing errors:**
- Verify REDIS_URL format: `redis://:password@host:port/db`
- Check for URL encoding issues (special characters in password/host)
- Use `--redis-host` and other CLI flags to override if REDIS_URL is misconfigured
- Test REDIS_URL parsing: `python -c "from beast_mailbox_core.cli import parse_redis_url; print(parse_redis_url('redis://:pass@host:6379/0'))"`

**Blocking in tests:**
- See `.kiro/steering/testing-patterns.md` for guidance on mocking ReflectiveModule

## Documentation

- **📘 [API Reference](docs/API.md)** - Comprehensive API documentation for integration
- **🤖 [beast-agent Integration](https://github.com/nkllon/beast-agent/blob/main/docs/INTEGRATION_WITH_MAILBOX_CORE.md)** - Authoritative guide for using beast-agent with beast-mailbox-core ⭐ (v0.1.3+)
- **📖 [Usage Guide](docs/USAGE_GUIDE.md)** - Detailed usage patterns and examples

**Note:** Deprecated temporary guides (see beast-agent repo for authoritative docs):
  - ~~[Using beast-agent](docs/USING_BEAST_AGENT.md)~~ (deprecated - use beast-agent docs)
  - ~~[Cluster Discovery](docs/CLUSTER_DISCOVERY.md)~~ (deprecated - use beast-agent docs)
- **🔍 [SonarCloud & Integration Testing](docs/SONARCLOUD_INTEGRATION_GUIDE.md)** - Best practices for quality infrastructure
- **📋 [Quick Reference](docs/QUICK_REFERENCE.md)** - Command cheat sheet
- **📚 [Lessons Learned](docs/LESSONS_LEARNED_v0.3.0.md)** - 80+ lessons from v0.1.0 → v0.3.0

## For AI Maintainers

**This repository was built 100% by AI agents and is maintained by AI agents.**

If you're an AI agent tasked with maintaining this repository, start here:
- **📖 [AGENT.md](AGENT.md)** - Comprehensive maintainer guide for AI agents
- **📚 [docs/LESSONS_LEARNED_v0.3.0.md](docs/LESSONS_LEARNED_v0.3.0.md)** - 80+ lessons from v0.1.0 → v0.3.0
- **🔧 [steering/release-procedure-CORRECTED.md](steering/release-procedure-CORRECTED.md)** - Mandatory release procedure

These documents contain critical context, quality standards, testing requirements, release procedures, and lessons learned from building this project from crisis to excellence.

## Version History

### 0.2.0 (2025-10-10)
- Added `--ack` flag for acknowledging messages after inspection
- Added `--trim` flag for deleting messages from the stream
- Comprehensive test suite (21 tests, all passing)
- Enhanced error handling for partial failures
- Clear logging with emoji indicators

### 0.1.0 (Initial release)
- Basic streaming mailbox service
- One-shot message inspection
- Message sending utility


