Pillow — consistent, modern idioms

Pillow 10 removed the constants and metrics APIs that dominate training data — Image.ANTIALIAS, draw.textsize, font.getsize — so generated code crashes on modern installs; and the library's quieter semantics (lazy open, mutating thumbnail vs returning resize, mode/format coupling, EXIF orientation) produce silently wrong images. This skill pins the canonical idiom set for Pillow 10+.

Canonical idioms — always X, never Y