NotoColorEmoji-digits.ttf is a test-only subset of Google's Noto Color Emoji, licensed under SIL OFL 1.1 (see OFL-NotoEmoji.txt). It is not bundled into the application. The font's embedded copyright/name records are retained.

Source: https://github.com/googlefonts/noto-emoji/blob/f3ae03f5e9b3b8516fa151f7168159ca1a3e7515/fonts/NotoColorEmoji.ttf

Original SHA-256: 72a635cb3d2f3524c51620cdde406b217204e8a6a06c6a096ff8ed4b5fd6e27b

Reproduce with FontTools (pyftsubset):

pyftsubset NotoColorEmoji.ttf \
  --unicodes=U+0023,U+002A,U+0030-0039,U+00A9,U+00AE,U+20E3,U+FE0E,U+FE0F,U+1F600 \
  --output-file=NotoColorEmoji-digits.ttf

This retains the bitmap digits, hash, asterisk, copyright/registered symbols, keycap sequences, and grinning face. It reproduces issues #16/#23 without depending on fonts installed on the machine: when an email names an unavailable platform font, Parley can select this emoji font for plain digits before reaching its Latin/Common fallback. Vello CPU's current build lacks PNG glyph support, so these bitmap digits vanish; Vello GPU paints them with emoji metrics and excessive spacing. The tests verify that text uses the regular fallback while real emoji still select the emoji family.