* README documents new modes, format/index_str output, reset button, and adds a dev section covering uv, ruff, pyright, pytest. * CHANGELOG follows Keep a Changelog with entries for v2.0.0, v1.1.1, v1.1.0, v1.0.0. * workflows/hold_counter_basic.json: minimal example wiring HoldCounter to LoadImage + PreviewAny.