Original PickImageColors unused-palette experiment, October 13, 2026. Two 240x120 two-bit indexed PNGs with four actual PLTE entries; only indices0/1 are used, 14400 pixels each. Control changes only unused entry2 from pink to blue. Run check-used-colors.py with Python and Pillow. Live observations record two actual public-tool uploads, two generated palettes and four actual clicks in Codex in-app browser. Opaque files, no profiles; no general guarantee for quantization or other tools.
