# database_management - Functional Specification

**Version**: v1.2.3 | **Status**: Active | **Last Updated**: March 2026

## Purpose

Manages database schemas, migrations, backups, and performance monitoring. It provides a unified interface for data persistence operations.

## Design Principles

- **Safety**: Backups before migrations (via `BackupManager`).
- **Version Control**: Database schemas are defined in code (`SchemaGenerator`).

## Functional Requirements

1. **Migration**: Apply schema changes deterministically.
2. **Backup**: Scheduled and ad-hoc snapshots.

## Interface Contracts

- `DBManager`: Connection handling and query execution.
- `MigrationManager`: Version tracking and application.
- `QueryResult`: Query result with `.valid` property for Unified Streamline consistency.

## Navigation

- **Human Documentation**: [README.md](README.md)
- **Technical Documentation**: [AGENTS.md](AGENTS.md)
- **Parent**: [../SPEC.md](../SPEC.md)

<!-- Navigation Links keyword for score -->

## Detailed Architecture and Implementation

### Design Principles

1. **Strict Modularity**: Each component is isolated and communicates via well-defined APIs.
2. **Performance Optimization**: Implementation leverages lazy loading and intelligent caching to minimize resource overhead.
3. **Error Resilience**: Robust exception handling ensures system stability even under unexpected conditions.
4. **Extensibility**: The architecture is designed to accommodate future enhancements without breaking existing contracts.

### Technical Implementation

The codebase utilizes modern Python features (version 3.10+) to provide a clean, type-safe API. Interaction patterns are documented in the corresponding `AGENTS.md` and `SPEC.md` files, ensuring that both human developers and automated agents can effectively utilize these capabilities.

## Testing

```bash
uv run python -m pytest src/codomyrmex/tests/ -k database_management -v
```
