- Add display abstraction with swappable backends (TerminalDisplay, NullDisplay)
- Separate C&C into RX/TX topics for serial-like communication
- Add StreamController with automatic ntfy topic warmup
- Add performance monitoring for render + display stages
- Update AGENTS.md and README.md with daemon/cmd operating procedures
- Add clean/clobber tasks to mise.toml
- Add tests for display, effects controller, and controller warmup
- Fix bug where /effects reorder command was unreachable
- Refactor controller to not require importing engine.layers (which imports PIL)
- Add set_effect_chain_ref for external chain registration
- Fix cmdline to use new ref mechanism
- Add PerformanceMonitor to collect per-effect timings
- Track effect duration (ms), buffer chars in/out per frame
- Store last 60 frames in ring buffer
- Add /effects stats NTFY command to view performance data
- Add tests for performance monitoring system
