# Progress

## 2026-04-27

- Created project directory `~/Code/cold_display_guard`.
- Confirmed standalone project scope and initial project name.
- Started file-based planning files.
- Created core engine, config loader, CLI, README, design doc, implementation plan, and tests.
- First test run failed because `_end_batch()` set `ended_at` before calculating dwell seconds, causing ended batches to report `0` seconds. Fixed by calculating dwell before assigning `ended_at`.
- Test suite now passes: `PYTHONPATH=src python3 -m unittest discover -s tests -v`.
- Initialized git repository and created the initial project commit.
- Added RTSP single-frame calibration tool under `tools/calibrator`.
- Added formal management API on port `19080` and Vite frontend on port `23000`.