PSR-3 compliant logger implementation that writes to stderr or any stream. Features log level filtering, context interpolation, and exception formatting. Self-contained and dependency-free beyond PSR interfaces, making it easily reusable in any PHP application needing standardized logging.

Implements sophisticated rate limiting with sliding window algorithm and adaptive banning based on error frequency. Tracks request timestamps to enforce RPM limits and progressively increases ban durations after repeated failures. Completely self-contained with no external dependencies, making it reusable in any application needing traffic throttling or abuse prevention.