# Core Pack Setup Implementation Summary

**Date:** 2025-01-20  
**Task:** Core Pack Setup - Loader Script & Documentation  
**Status:** ✅ Complete

## Overview

Created a comprehensive system for loading the Attune core pack from the filesystem into the database. This enables the built-in system pack to be properly initialized with all its actions, triggers, and sensors.

## What Was Built

### 1. Python Loader Script (`scripts/load_core_pack.py`)

**Purpose:** Parse YAML pack definitions and load them into the database

**Features:**
- Reads `pack.yaml` for pack metadata
- Loads triggers from `triggers/*.yaml`
- Loads actions from `actions/*.yaml`
- Loads sensors from `sensors/*.yaml`
- Creates runtime entries for actions and sensors
- Idempotent operations (can be run multiple times safely)
- Transaction-based (all-or-nothing)
- Command-line arguments for flexibility
- Comprehensive error handling and reporting

**Usage:**
```bash
# Basic usage
python3 scripts/load_core_pack.py

# With custom database URL
python3 scripts/load_core_pack.py --database-url "postgresql://..."

# With custom pack directory
python3 scripts/load_core_pack.py --pack-dir ./packs
```

**Key Functions:**
- `upsert_pack()` - Create/update pack metadata
- `upsert_triggers()` - Load all trigger definitions
- `upsert_actions()` - Load all action definitions
- `upsert_sensors()` - Load all sensor definitions
- `ensure_shell_runtime()` - Create shell runtime for actions
- `ensure_sensor_runtime()` - Create built-in sensor runtime

**Database Operations:**
- Uses `ON CONFLICT ... DO UPDATE` for upserts
- Maintains referential integrity (pack → triggers/actions → sensors)
- Returns IDs for cross-referencing
- Proper transaction handling with rollback on error

### 2. Shell Wrapper Script (`scripts/load-core-pack.sh`)

**Purpose:** User-friendly wrapper with prerequisite checking

**Features:**
- Prerequisites validation (Python, packages, database)
- Interactive package installation
- Database connectivity testing
- Colored output for better UX
- Help documentation
- Environment variable support
- Verbose mode for debugging

**Checks Performed:**
1. ✓ Python 3 is installed
2. ✓ Required Python packages (psycopg2-binary, pyyaml)
3. ✓ Database is accessible
4. ✓ Core pack directory exists
5. ✓ pack.yaml file is present

**Usage:**
```bash
# Basic usage
./scripts/load-core-pack.sh

# With options
./scripts/load-core-pack.sh --database-url "postgresql://..." --verbose

# Dry run
./scripts/load-core-pack.sh --dry-run
```

### 3. Comprehensive Documentation

#### `packs/core/SETUP.md` (305 lines)

Complete setup guide including:
- **Overview** - What the core pack provides
- **Prerequisites** - Requirements before loading
- **Loading Methods** - 3 different approaches:
  1. Python loader script (recommended)
  2. SQL seed script
  3. CLI (future)
- **Verification** - How to confirm successful loading
- **Testing** - Testing the loaded pack
- **Updating** - Re-running after changes
- **Troubleshooting** - Common issues and solutions
- **Development Workflow** - Adding new components
- **Environment Variables** - Configuration options
- **CI/CD Integration** - Automated deployment examples

#### Updated `README.md`

Added new section "3. Load the Core Pack":
- Quick start instructions
- Verification commands
- Link to detailed setup guide
- Renumbered subsequent sections

### 4. Existing Assets

**Already Present:**
- ✅ `packs/core/pack.yaml` - Pack metadata
- ✅ `packs/core/actions/*.yaml` - Action definitions (echo, sleep, noop, http_request)
- ✅ `packs/core/actions/*.sh` - Shell action implementations
- ✅ `packs/core/actions/*.py` - Python action implementations
- ✅ `packs/core/triggers/*.yaml` - Trigger definitions (intervaltimer, crontimer, datetimetimer)
- ✅ `packs/core/sensors/*.yaml` - Sensor definitions
- ✅ `packs/core/sensors/*.py` - Sensor implementations
- ✅ `packs/core/README.md` - Component documentation
- ✅ `packs/core/TESTING.md` - Testing procedures
- ✅ `packs/core/test_core_pack.sh` - Test suite
- ✅ `scripts/seed_core_pack.sql` - SQL seed script (legacy)

## Core Pack Contents

### Pack Metadata
- **Ref:** `core`
- **Version:** `1.0.0`
- **Type:** System pack (built-in)

### Triggers (3)
1. `core.intervaltimer` - Regular interval-based timer
2. `core.crontimer` - Cron schedule-based timer
3. `core.datetimetimer` - One-shot datetime timer

### Actions (4)
1. `core.echo` - Echo message to stdout
2. `core.sleep` - Sleep for N seconds
3. `core.noop` - No operation (testing)
4. `core.http_request` - Make HTTP requests

### Sensors (1)
1. `core.interval_timer_sensor` - Built-in interval timer sensor

## Technical Details

### Database Schema Usage

**Tables Populated:**
- `attune.pack` - Core pack entry
- `attune.runtime` - Shell and sensor runtimes
- `attune.trigger` - Trigger type definitions
- `attune.action` - Action definitions
- `attune.sensor` - Sensor instances

**Key Features:**
- UPSERT operations for idempotency
- Proper foreign key relationships
- JSON schema storage for parameters/output
- Runtime type discrimination (action vs sensor)

### Python Dependencies

Required packages:
- `psycopg2-binary` - PostgreSQL database adapter
- `pyyaml` - YAML parsing

### Environment Variables

- `DATABASE_URL` - PostgreSQL connection string
  - Default: `postgresql://postgres:postgres@localhost:5432/attune`
  
- `ATTUNE_PACKS_DIR` - Base directory for packs
  - Default: `./packs`

## Usage Workflow

### First-Time Setup
```bash
# 1. Ensure database is running and migrations applied
createdb attune
sqlx migrate run

# 2. Install Python dependencies
pip install psycopg2-binary pyyaml

# 3. Load core pack
./scripts/load-core-pack.sh

# 4. Verify
attune pack show core
```

### Development Workflow
```bash
# 1. Edit pack files (actions, triggers, sensors)
vim packs/core/actions/new_action.yaml
vim packs/core/actions/new_action.sh

# 2. Make scripts executable
chmod +x packs/core/actions/new_action.sh

# 3. Test locally
export ATTUNE_ACTION_FOO="bar"
./packs/core/actions/new_action.sh

# 4. Reload into database
./scripts/load-core-pack.sh

# 5. Restart services
# API, executor, worker, sensor services
```

### Updating Existing Components
```bash
# 1. Modify YAML definitions
vim packs/core/actions/echo.yaml

# 2. Re-run loader (upsert mode)
./scripts/load-core-pack.sh

# 3. Changes take effect immediately for new executions
```

## Testing

### Loader Script Testing
```bash
# Syntax check
python3 -m py_compile scripts/load_core_pack.py

# Dry run
python3 scripts/load_core_pack.py --dry-run

# Actual load
python3 scripts/load_core_pack.py
```

### Verification Queries
```sql
-- Check pack exists
SELECT * FROM attune.pack WHERE ref = 'core';

-- Count components
SELECT 
    (SELECT COUNT(*) FROM attune.trigger WHERE pack_ref = 'core') as triggers,
    (SELECT COUNT(*) FROM attune.action WHERE pack_ref = 'core') as actions,
    (SELECT COUNT(*) FROM attune.sensor WHERE pack_ref = 'core') as sensors;

-- List all core components
SELECT ref, label FROM attune.trigger WHERE pack_ref = 'core';
SELECT ref, label FROM attune.action WHERE pack_ref = 'core';
SELECT ref, label FROM attune.sensor WHERE pack_ref = 'core';
```

### End-to-End Test
```bash
# 1. Load pack
./scripts/load-core-pack.sh

# 2. Create a test rule
attune rule create \
  --name "test_timer" \
  --trigger "core.intervaltimer" \
  --trigger-config '{"unit":"seconds","interval":10}' \
  --action "core.echo" \
  --action-params '{"message":"Hello!"}' \
  --enabled

# 3. Monitor executions
attune execution list --limit 5
```

## Files Created

- ✅ `scripts/load_core_pack.py` (478 lines)
- ✅ `scripts/load-core-pack.sh` (231 lines)
- ✅ `packs/core/SETUP.md` (305 lines)
- ✅ `work-summary/core-pack-setup-summary.md` (this file)

## Files Modified

- ✅ `README.md` - Added "Load the Core Pack" section

## Benefits

### For Users
- **Simple Setup** - One command to load entire pack
- **Clear Documentation** - Step-by-step guides
- **Error Messages** - Helpful troubleshooting info
- **Verification Tools** - Easy to confirm success

### For Developers
- **Flexible Loading** - Multiple methods available
- **Idempotent** - Safe to run multiple times
- **Version Control** - YAML definitions in git
- **Easy Updates** - Change YAML and reload
- **Extensible** - Easy to add new components

### For Operations
- **Automated** - Script-based for CI/CD
- **Transactional** - All-or-nothing updates
- **Logged** - Clear output for debugging
- **Configurable** - Environment variable support

## Future Enhancements

### Short Term
- [ ] Add `--force` flag to delete and recreate
- [ ] Add validation mode (check YAML without loading)
- [ ] Generate migration SQL from YAML changes
- [ ] Support loading multiple packs at once

### Medium Term
- [ ] CLI integration: `attune pack load ./packs/core`
- [ ] Pack versioning and upgrades
- [ ] Dependency resolution between packs
- [ ] Pack marketplace/registry support

### Long Term
- [ ] Hot-reload without service restart
- [ ] Pack development mode with file watching
- [ ] Pack testing framework
- [ ] Pack distribution as archives

## Integration Points

### Services That Use Core Pack

1. **Sensor Service** - Runs interval timer sensor
2. **Worker Service** - Executes core actions
3. **Executor Service** - Schedules core action executions
4. **API Service** - Serves core pack metadata

### Other Packs Can Depend On Core

Example in `custom-pack/pack.yaml`:
```yaml
runtime_deps:
  - core
```

## Success Criteria

- ✅ Core pack can be loaded with one command
- ✅ All components (triggers, actions, sensors) are created
- ✅ Idempotent operation (safe to re-run)
- ✅ Clear error messages on failure
- ✅ Comprehensive documentation
- ✅ Verification commands work
- ✅ Compatible with existing pack structure

## Next Steps

After loading the core pack:

1. **Start Services** - Run executor, worker, sensor services
2. **Create Rules** - Use core triggers and actions
3. **Test Automation** - Verify timer triggers fire
4. **Build Custom Packs** - Create domain-specific automation
5. **Monitor Executions** - Observe core actions running

## Related Documentation

- `packs/core/README.md` - Component reference
- `packs/core/SETUP.md` - Detailed setup guide
- `packs/core/TESTING.md` - Testing procedures
- `docs/pack-development.md` - Creating custom packs
- `docs/api-packs.md` - Pack management API

---

**Core Pack Setup Status: ✅ COMPLETE AND PRODUCTION-READY**

The core pack can now be easily loaded into any Attune installation with comprehensive documentation and tooling support.