Product Decisions This Supports

Enables rapid development of cache-dependent features without external dependencies, reducing setup time and infrastructure costs during early stages.
Provides a consistent PSR-6 interface for testing, ensuring code works with any PSR-6 implementation without rewriting logic.
Serves as a temporary fallback during development when production cache systems aren't configured, allowing teams to focus on business logic first.
Supports deterministic testing via custom clock implementations (e.g., frozen time), critical for validating cache expiration logic in unit tests.

When to Consider This Package

✅ Ideal for local development, unit tests, and CI pipelines where speed and simplicity matter.
✅ When building new features that abstract cache usage via PSR-6 but haven't finalized production cache infrastructure.
❌ Avoid for production environments requiring persistence, high availability, or distributed caching (e.g., Redis, Memcached).
❌ Not suitable for applications needing multi-process/multi-server cache sharing due to in-memory, process-specific nature.
❌ If your project requires advanced features like cache eviction policies beyond TTL or large-scale data storage.

Executives: "This package eliminates the need for external caching infrastructure during development and testing phases, saving costs and accelerating time-to-market. By using a standards-compliant in-memory cache, our team can build and validate cache-dependent features faster without relying on complex production systems, ensuring smoother transitions to scalable solutions later."
Engineering: "A lightweight, PSR-6 compliant in-memory cache that requires zero configuration. Perfect for mocking cache behavior in tests—supports TTL via PSR-20 clock for deterministic time-based validation. Integrates seamlessly with existing codebases, reducing test setup time and avoiding external dependencies like Redis during local development."