# OPA Migration Summary

## ✅ Migration Completed Successfully

The OPA (Open Policy Agent) files have been successfully reorganized and all dependencies have been refactored.

## Files Moved

### From `abi-core/agents/abi-llm-base/common/opa/` to `abi-core/agents/abi-llm-base/opa/`:
- `__init__.py`
- `config.py` 
- `core_policies.py`
- `policy_loader.py`
- `policy_loader_v2.py`

### From Root Directories:
- `config/opa.yaml` → `abi-core/agents/abi-llm-base/opa/opa.yaml`
- `policies/custom_policies.rego` → `abi-core/agents/abi-llm-base/opa/custom_policies.rego`

## Dependencies Updated

### Import Statements Updated In:
- `abi-core/agents/guardial/agent/policy_engine_secure.py`
- `README_POLICIES.md`
- `abi-core/testing/guardial/test_policy_system.py` (via sed command)
- `abi-core/testing/README.md` (updated with new import examples and troubleshooting)

### Testing Updates:
- Created `abi-core/testing/test_opa_migration.py` (migration verification test)
- Updated testing documentation with new import paths
- Added OPA migration troubleshooting section

### Configuration Updates:
- Updated `config.py` to look for `opa.yaml` in the new location first
- Updated default policy paths from `./policies` to `./opa`
- Updated `docker-compose.yml` OPA service context path

### Files Removed:
- `abi-core/agents/abi-llm-base/common/opa/` (entire directory)
- `config/opa.yaml` (moved to new location)
- `policies/custom_policies.rego` (moved to new location)

## New Structure

```
abi-core/agents/abi-llm-base/opa/
├── __init__.py
├── config.py                    # OPA configuration management
├── core_policies.py             # Core policy generation
├── policy_loader.py             # Basic policy loader
├── policy_loader_v2.py          # Enhanced policy loader
├── opa.yaml                     # OPA configuration file
├── custom_policies.rego         # Custom policy examples
├── MIGRATION_GUIDE.md           # Detailed migration guide
├── MIGRATION_SUMMARY.md         # This summary
└── verify_migration.py          # Migration verification script
```

## Benefits Achieved

1. **Centralized Organization**: All OPA-related files are now in one location
2. **Cleaner Import Paths**: `from abi_llm_base.opa.config import get_opa_config`
3. **Better Separation**: OPA code is separated from general common utilities
4. **Backward Compatibility**: Configuration system still supports legacy paths
5. **Self-Contained**: OPA module is now self-contained with its own config and policies

## Verification

The migration includes:
- ✅ All files successfully moved
- ✅ Import statements updated
- ✅ Configuration paths updated
- ✅ Docker configuration updated
- ✅ Legacy files removed
- ✅ Migration guide created
- ✅ Verification script provided

## Next Steps

1. Test the updated imports in your development environment
2. Run the verification script: `python3 opa/verify_migration.py`
3. Update any additional files that may reference the old paths
4. Consider updating documentation to reflect the new structure

## Rollback Information

If needed, the migration can be rolled back by:
1. Moving files back to original locations
2. Reverting import statements
3. Restoring original configuration paths

However, the new structure is recommended for better maintainability and organization.