# Distributed Cache -- Technical Specification

**Version**: v1.0.0 | **Status**: Placeholder | **Last Updated**: March 2026

## Overview

Reserved submodule for distributed caching with Redis cluster support. Currently contains only a package `__init__.py` with an empty `__all__` export list and no implementation classes.

## Architecture

This module is a structural placeholder within the `cache` package hierarchy. It is intended to provide distributed cache backends (e.g., Redis cluster, Memcached) as an alternative to the in-process cache implementations in `cache/policies/` and `cache/serializers/`.

## Current State

No implementation classes or functions exist in this submodule. The `__init__.py` exports an empty `__all__` list.

## Planned Capabilities

- Redis cluster client integration
- Distributed cache invalidation protocols
- Consistent hashing for key distribution
- Connection pooling and health checks

## Dependencies

- **Internal**: Expected to depend on `cache.policies`, `cache.serializers`, `logging_monitoring`
- **External**: Expected to depend on `redis` (optional)

## Constraints

- No implementation exists; importing this module provides no functionality.
- Any future implementation must follow the zero-mock policy: real Redis connections only, `NotImplementedError` for unimplemented paths.

## Error Handling

- Not applicable until implementation is added.

## Navigation

- **Self**: `SPEC.md`
- **Parent**: [../README.md](../README.md)
- **Readme**: [README.md](README.md)
- **Agents**: [AGENTS.md](AGENTS.md)
- **Repository Root**: [README.md](../../../../README.md)
